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CN108688765A - The method for transmitting signals of axis moment measuring device - Google Patents

The method for transmitting signals of axis moment measuring device Download PDF

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Publication number
CN108688765A
CN108688765A CN201810428671.6A CN201810428671A CN108688765A CN 108688765 A CN108688765 A CN 108688765A CN 201810428671 A CN201810428671 A CN 201810428671A CN 108688765 A CN108688765 A CN 108688765A
Authority
CN
China
Prior art keywords
axis
torque
antenna
deformation
acquisition circuit
Prior art date
Legal status (The legal status is an assumption and is not a legal conclusion. Google has not performed a legal analysis and makes no representation as to the accuracy of the status listed.)
Pending
Application number
CN201810428671.6A
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Chinese (zh)
Inventor
夏静满
胡江勇
李家成
Current Assignee (The listed assignees may be inaccurate. Google has not performed a legal analysis and makes no representation or warranty as to the accuracy of the list.)
ACMA electric drive system (Suzhou) Co.,Ltd.
Original Assignee
Chongqing Clover Technology Co Ltd
Priority date (The priority date is an assumption and is not a legal conclusion. Google has not performed a legal analysis and makes no representation as to the accuracy of the date listed.)
Filing date
Publication date
Application filed by Chongqing Clover Technology Co Ltd filed Critical Chongqing Clover Technology Co Ltd
Priority to CN201810428671.6A priority Critical patent/CN108688765A/en
Publication of CN108688765A publication Critical patent/CN108688765A/en
Pending legal-status Critical Current

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    • B—PERFORMING OPERATIONS; TRANSPORTING
    • B62—LAND VEHICLES FOR TRAVELLING OTHERWISE THAN ON RAILS
    • B62M—RIDER PROPULSION OF WHEELED VEHICLES OR SLEDGES; POWERED PROPULSION OF SLEDGES OR SINGLE-TRACK CYCLES; TRANSMISSIONS SPECIALLY ADAPTED FOR SUCH VEHICLES
    • B62M6/00—Rider propulsion of wheeled vehicles with additional source of power, e.g. combustion engine or electric motor
    • B62M6/40—Rider propelled cycles with auxiliary electric motor
    • B62M6/45—Control or actuating devices therefor
    • B62M6/50—Control or actuating devices therefor characterised by detectors or sensors, or arrangement thereof

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  • Engineering & Computer Science (AREA)
  • Chemical & Material Sciences (AREA)
  • Combustion & Propulsion (AREA)
  • Transportation (AREA)
  • Mechanical Engineering (AREA)
  • Arrangements For Transmission Of Measured Signals (AREA)

Abstract

The present application relates to moped actuation techniques fields, specifically disclose a kind of method for transmitting signals of axis moment measuring device, including the following contents:The circuit board being arranged on axis, by torque Acquisition Circuit receive be arranged on deformation bridge strain blade unit transmission come electric signal and its logic is converted into torque size, torque Acquisition Circuit receives two Hall elements and transmits the pulse signal come and the rotation direction for being converted into stepping frequency and axis, and these electric signals are sent to torque control and treatment circuit by the first antenna being arranged on axis and the second antenna;Torque control and treatment circuit according to from torque Acquisition Circuit transmit come torque size, stepping frequency and rotation direction logical calculated go out electric machine theory output power and send electric machine controller to.The application can precisely transmit signal.

Description

The method for transmitting signals of axis moment measuring device
Technical field
The present invention relates to moped actuation techniques fields, and in particular to a kind of moped axis moment inspecting dress The method for transmitting signals set.
Background technology
Axis refers to being used for connecting two foot pedals on moped, and the chain on claw and claw is driven to rotate Structure, axis are the core components of moped, for driving, controlling vehicle normally travel.Cyclist needs when riding Central axis is driven by scrunching foot pedal, and then drives and is rotated with the claw of middle axis connection, claw drives chain rotation, chain Band moves tyre rotation.
In order to detect the output power that human power is applied on moped, need to the torsional moment on axis It is detected, after sensing, needs to pass to the signals such as torque size, stepping frequency and central axis direction at torque Reason module carries out processing and finally obtains output power of motor, then output power of motor signal is sent to the electricity of moped Machine, control motor provide power-assisted according to this power.
Applicant's synchronization has applied for that a kind of axis moment measuring device that can accurately provide power-assisted, the application are exactly used for The method for transmitting signals of signal transmission is carried out in the device.
Because axis rotates always at work, in existing signal transmission system, antenna is in rotation process Meeting jitter increases also because being made poor signal quality by the interference of other metal devices in signals transmission Error makes the power-assisted finally provided error occur, and the using effect for eventually leading to moped is poor.
Invention content
The invention is intended to provide a kind of method for transmitting signals of the axis moment measuring device of energy precise delivery signal.
To achieve the above objectives, following method is provided:
Method one:The method for transmitting signals of axis moment measuring device, including the following contents:The circuit being arranged on axis Plate, by torque Acquisition Circuit receive be arranged on deformation bridge strain blade unit transmission come electric signal and its logic is converted At torque size, torque Acquisition Circuit receives two Hall elements and transmits the pulse signal come and be converted into stepping frequency and axis Rotation direction, and by these electric signals by the first antenna being arranged on axis and the second antenna be sent to torque processing control Circuit processed;Torque control and treatment circuit according to from torque Acquisition Circuit transmit come torque size, stepping frequency and rotation direction Logical calculated goes out electric machine theory output power and sends electric machine controller to.
Explanation of nouns:
Electric machine controller:Refer to the control device for being mounted on and being used for controlling rotation on motor.
Torque size:Refer to torsional moment sizes values.
Stepping frequency:Refer to the frequency that cyclist steps on foot pedal.
The operation principle and advantage of the present invention is:
With torque Acquisition Circuit, torque size is acquired from the foil gauge on deformation bridge, is received from two Hall elements The rotation direction of stepping frequency and axis that pulse signal is converted into, wherein axis is that rotation is generated under torsion, axis Rotation direction is exactly the direction of torsion, and the rotation direction that torque size is multiplied by axis is exactly the torque of torsion, torque acquisition electricity Road can will veritably detect that cyclist is applied to the torque on moped, be calculated for torque control and treatment circuit below Manpower output power and electric machine theory output power provide accurately parameter.Torque control and treatment circuit is receiving torque and is pedaling After stepping on frequency, torque and stepping frequency are multiplied by a predetermined constant, obtain the people that current cyclist is applied to moped Power output power obtains the electric machine theory that should be exported on electric machine theory at this time output multiplied by the assist rate selected with cyclist Power.Electric machine theory output power is sent to electric machine controller by torque control and treatment circuit, and control motor is carried according to this power For the power-assisted for being suitble to cyclist to need.
Compared to the pseudo- torque that present many detection devices are all detection, the axis moment measuring device inspection that the present invention applies It can veritably detect torsional moment, and then can accurately calculate the theoretical output power that motor should provide, make electricity Machine can be supplied to the required power-assisted of moped cyclist according to the size of the manpower output power of cyclist, avoid helping Power it is excessive or too small and caused by bad influence.
When torque Acquisition Circuit and torque control and treatment circuit one are arranged on axis one and are not located on axis When, wireless signal transmission is carried out by first antenna and the second antenna.
Two antennas are located in the opposite sides of axis, and two antennas conducting wire is connected rotable antenna, is compensated for The shortcomings that present antenna back side because be blocked can not transmit, enable the rotable antenna 360 deg to be formed in all directions into Row signal transmission.Meanwhile because there are two radio antenna, the intensity of aerial signal transmission is strengthened, axis is especially worked as When rotation, it is total there are one radio antenna from it is closer, and because two antennas can gamut radiation, effectively increase The continuity and signal strength of signal transmission ensure that axis data in rotary course are not lost, it is ensured that data acquire accurate Degree, improves sensitivity and the stability of system.
Method two:The method for transmitting signals of axis moment measuring device, including the following contents:The circuit being arranged on axis Plate, by torque Acquisition Circuit receive be arranged on deformation bridge strain blade unit transmission come electric signal and its logic is converted At torque size, torque Acquisition Circuit receives two Hall elements and transmits the pulse signal come and be converted into stepping frequency and axis Rotation direction, and these electric signals are sent to torque control and treatment circuit by conducting wire;Torque control and treatment circuit according to Torque size, stepping frequency and the rotation direction logical calculated come, which are transmitted, from torque Acquisition Circuit goes out electric machine theory output power simultaneously Electric machine controller is sent to by first antenna and the second antenna.
When torque Acquisition Circuit and torque control and treatment circuit are all disposed on circuit board, that is, it is all disposed within axis When upper, signal transmission was directly carried out by conducting wire between two circuits, and torque control and treatment circuit then by first antenna and Second antenna sends the electric machine theory output power being calculated to electric machine controller.
Method three:The method for transmitting signals of axis moment measuring device, including the following contents:The circuit being arranged on axis Plate, by torque Acquisition Circuit receive be arranged on deformation bridge strain blade unit transmission come electric signal and its logic is converted Torque control and treatment circuit is passed at torque size and by first antenna and the second antenna;Torque control and treatment circuit receives Two Hall elements transmit the pulse signal come and the rotation direction for being converted into stepping frequency and axis;Torque control and treatment circuit Go out electric machine theory output power according to stepping frequency, the rotation direction of axis and torque size logical calculated and is passed by conducting wire Give electric machine controller.
Method three and method one difference lies in, the torque Acquisition Circuit value being arranged on axis has detected torque size, And the rotation direction of stepping frequency and axis is all directly received by torque control and treatment circuit.
Method four:On the basis of method one or two further, shape occurs for central axis, the deformation bridge being arranged on axis Become, the interconnecting piece of deformation bridge and axis is rotated together with axis, and the suspending part of deformation bridge, which passes to deformation, to be arranged in deformation bridge On strain blade unit;Strain blade unit, which detects the deformation quantity of deformation bridge and deformation quantity is converted into electric signal, passes to torque Acquisition Circuit;
While central axis, the double Hall subassemblies being arranged on axis are arranged as axis rotates together in installation set On magnet ring and face double Hall subassemblies occur relative motion;Two unipolarity Hall elements point in double Hall subassemblies It does not do relative motion along the circumference of magnet ring, two Hall elements are respectively induced the poles N being continuously arranged on magnet ring and the poles S and are formed Pulse signal transmission gives torque Acquisition Circuit.
Double Hall subassemblies in method one and method two, which are provided on axis, is followed by what axis rotated together, and magnet ring is quiet Only, double Hall subassemblies are located in magnet ring.Magnet ring and double Hall subassemblies are followed by the rotation of axis and synchronous generation relative motion, make Two Hall elements in double Hall subassemblies can obtain the rotation direction of stepping frequency and axis by incuding the poles S and the poles N.It pedals Frequency is stepped on to be Hall element senses in the unit time the number of the poles S or the poles N divided by scrunch a Hall element and sense The poles S or the poles N number.The phase difference of the poles N and the poles S that the rotation direction of axis is sensed by two Hall elements obtains It arrives.Meanwhile the torsion that central axis generates is passed to by foil gauge by deformation bridge, the torsion by strain measurement axis is big It is small.The torque magnitude detected is multiplied by rotation direction and just obtains torsional moment.
The method for transmitting signals of axis moment measuring device of the present invention, ingenious setting magnet ring and double Hall subassemblies, make it is double suddenly You are able to detect that stepping frequency and central axis direction by component, and the output power to obtain axis torque and people detects necessity Parameter.The magnet steel used in compared with the prior art, magnet ring is that an entirety is not only easy for installation, is also beneficial to keep Hall first Part more accurately delicately incudes magnetic pole.The relative motion of magnet ring and double Hall subassemblies is synchronous with the rotation of axis, simple in structure But accuracy is high, along with the torque magnitude that strain measurement arrives, can veritably detect torsional moment, and the one of deformation bridge End is stationarily connected on axis, can accurately be incuded and be transmitted torque magnitude, make the torsional moment finally obtained and reality The torsional moment on border is sufficiently close to, and the method for transmitting signals of entire axis moment measuring device is made to have degree of precision.
Method five:On the basis of method one or two or three further, what is be arranged between dirt-proof boot and magnetic shield is wireless Power supply receiving coil and wireless power transmitting coil are used for powering for torque Acquisition Circuit and torque control and treatment circuit;It is wireless to supply Electric receiving coil and wireless power transmitting coil are coaxial and wireless power receiving coil is located in wireless power transmitting coil;Wirelessly It is both provided with antifreeze plate between power supply transmitting coil and dirt-proof boot and between wireless power receiving coil and magnetic shield.
Because wireless power transmitting coil and wireless power receiving coil are coaxial, even if two coils do not generate mutual fortune Dynamic, the magnetic induction line that they generate each other is also mutually cut, as long as wireless power transmitting coil is powered, then wireless power receiving coil In just will produce the magnetic flux of variation, so that wireless power receiving coil is generated induced current because of electromagnetic induction, no matter wirelessly Power supply receiving coil and wireless power transmitting coil between whether generate relative motion, always can be torque Acquisition Circuit and Torque control and treatment circuit is powered.
It, can be by wireless power transmitting coil and other of wireless power receiving coil and moped by antifreeze plate Metal structure, such as vehicle frame, bearing, axis are all kept apart, and can avoid wireless power transmitting coil and nothing to the maximum extent The loss that line power supply receiving coil produces electricl energy.
Method six:On the basis of method one or two or three further, during first antenna and the second antenna are by being wrapped in Conducting wire on axis is communicated.
Conducting wire is wrapped on axis, conducting wire can be avoided to loosen, and enables the signal between first antenna and the second antenna Low-loss transmission drops.
Method seven:On the basis of method six further, the serpentine-like cabling of conducting wire of first antenna and the second antenna is connected It is wrapped on axis and forms loop, tied up the second antenna on axis by loop.
Loop not only plays the role of transmitting signal between first antenna and the second antenna, also acts and pinions the The effect of two antennas.
Method eight:On the basis of method three further, central axis, the deformation bridge being arranged on axis deforms upon, The interconnecting piece of deformation bridge and axis is rotated together with axis, and the suspending part of deformation bridge, which passes to deformation, to be arranged on deformation bridge Strain blade unit;Strain blade unit, which detects the deformation quantity of deformation bridge and deformation quantity is converted into electric signal, passes to torque acquisition Circuit;
While central axis, for the magnet ring being arranged on axis as axis rotates together, what is be arranged in installation set is double Relative motion occurs for Hall subassembly and the magnet ring of face;Two unipolarity Hall elements in double Hall subassemblies respectively along The circumference of magnet ring does relative motion, and two Hall elements are respectively induced the poles N being continuously arranged on magnet ring and the poles S and form pulse letter Number it is transferred to torque Acquisition Circuit.
Difference lies in double Hall subassemblies are not located at axis to method eight, and magnet ring is arranged on axis, magnetic with method four Ring is followed by what axis rotated together, and double Hall subassemblies are located at outside magnet ring.
Description of the drawings
Fig. 1 is that the 1 corresponding axis moment inspecting of method for transmitting signals embodiment of axis moment measuring device of the present invention fills The structural schematic diagram set.
Fig. 2 is that the 1 corresponding axis moment inspecting of method for transmitting signals embodiment of axis moment measuring device of the present invention fills Set the structural schematic diagram of middle deformation bridge.
Fig. 3 is that the 1 corresponding axis moment inspecting of method for transmitting signals embodiment of axis moment measuring device of the present invention fills The logic diagram set.
Fig. 4 is that the 1 corresponding axis moment inspecting of method for transmitting signals embodiment of axis moment measuring device of the present invention fills Set the structural schematic diagram of middle multi-pole magnet-ring.
Fig. 5 is that the 1 corresponding axis moment inspecting of method for transmitting signals embodiment of axis moment measuring device of the present invention fills Set the structural schematic diagram of middle the two poles of the earth magnet ring.
Fig. 6 is that the 2 corresponding axis moment inspecting of method for transmitting signals embodiment of axis moment measuring device of the present invention fills The logic diagram set.
Fig. 7 is that the 3 corresponding axis moment inspecting of method for transmitting signals embodiment of axis moment measuring device of the present invention fills The logic diagram set.
Fig. 8 is that the 4 corresponding axis moment inspecting of method for transmitting signals embodiment of axis moment measuring device of the present invention fills The logic diagram set.
Fig. 9 is that the 5 corresponding axis moment inspecting of method for transmitting signals embodiment of axis moment measuring device of the present invention fills The structural schematic diagram set.
Figure 10 is that the 5 corresponding axis moment inspecting of method for transmitting signals embodiment of axis moment measuring device of the present invention fills Set the structural schematic diagram of middle multi-pole magnet-ring.
Figure 11 is that the 5 corresponding axis moment inspecting of method for transmitting signals embodiment of axis moment measuring device of the present invention fills Set the structural schematic diagram of middle the two poles of the earth magnet ring.
Specific implementation mode
Below by the further details of explanation of specific implementation mode:
Reference numeral in Figure of description includes:Axis 1, locking nut 2, claw 3, right bowl group 4, the first clamp spring 5, shape Become bridge 6, first bearing 7, dirt-proof boot 8, installation set 9, magnetic shield 10, multi-pole magnet-ring 11, foil gauge 12, circuit board 13, first every Magnetic sheet 14, wireless power receiving coil 15, the second antifreeze plate 16, wireless power transmitting coil 17, second bearing 18,3rd bearing 19, the second clamp spring 20, fourth bearing 21, left bowl group 22, first switch Hall 23, second switch Hall 24, the two poles of the earth magnet ring 25, double Polarity linear Hall 26.
Embodiment 1:
Embodiment 1 is substantially as shown in Fig. 1:1 moment inspecting system of axis include locking nut 2, claw 3, left bowl group 22, Right bowl group 4, axis 1, deformation bridge 6, sleeve and magnetic shield 10.
Such as Fig. 1 and shown, the left end of axis 1 connects left crank and the right side of Vehicular left pedal with right end by fastening screw respectively The right crank of foot pedal, left crank are located at the left side of left bowl group 22, and right crank is located at the right of right bowl group 4.The lateral surface of axis 1 It is provided with external screw thread on the upper position being connect with deformation bridge 6.The deformation bridge 6 is sleeved on axis 1, and deformation bridge 6 is with axis 1 by anti- To threaded connection, the internal thread of 1 threaded portion of axis and deformation bridge 6 is to lock.Deformation bridge 6 passes through reverse thread structure with axis 1 Connection substitutes original dentalation make-up, ensures seamless connectivity between axis 1 and deformation set, avoids dentation docking positive and negative Shake during turning ensures the accuracy of data acquisition, and easy for installation.
Left bowl group 22 and right bowl group 4 are separately mounted to the left and right both ends of axis 1, and left bowl group 22 and right bowl group 4 have The Five-way tube both ends of external screw thread, force-aid bicycle frame are provided with internal thread corresponding with left and right bowl group 4, and axis 1 passes through left bowl group 22 are mounted on right bowl group 4 in Five-way tube.The vehicle frame of axis 1 and moped is connected into one by left bowl group 22 and right bowl group 4 A entirety, meanwhile, 4 pairs of left bowl group 22 and right bowl group are connected to all structures on axis 1 and play a limit and fixed work With.Left bowl group 22 is fixed on by fourth bearing 21 on axis 1, and right bowl group 4 is fixed on by first bearing 7 on axis 1, wherein The inner ring of fourth bearing 21 is contacted with axis 1, and the inner ring of first bearing 7 is contacted with deformation bridge 6 is pressed on axis 1 by deformation bridge 6 On.The inside of right bowl group 4 is equipped with the first clamp spring 5 radially-inwardly stretched out, is limited to first bearing 7 by the first clamp spring 5.The The left side of one clamp spring 5 is abutted with the right side of first bearing 7.
Sleeve includes being sleeved on from inside to outside on axis 1, for fixing axis 1 or being provided for other devices on axis 1 Magnetic shield 10, installation set 9 and the dirt-proof boot 8 of connection structure.It is provided between magnetic shield 10 and dirt-proof boot 8 from inside to outside in The first antifreeze plate 14 and the second antifreeze plate 16 of axis 1.The first antifreeze plate 14 close to axis 1 has lower magnetic permeability, prevents Circuit between first antifreeze plate 14 and the second antifreeze plate 16 transmits electromagnetic signal to axis 1, reduces axis 1 to being arranged in axis The influence of circuit on 1.The second antifreeze plate 16 far from axis 1 has higher magnetic permeability, guides the first antifreeze plate 14 and the Circuit between two antifreeze plates 16 sends electromagnetic signal towards the direction of the second antifreeze plate 16, can ensure the outside in magnetic field in this way Diverging, enables the circuit being arranged on axis 1 preferably to transfer out signal.
Magnetic shield 10 is directly sleeved on axis 1, and the longitudinal section of axis 1 and 10 contact portion of magnetic shield is ladder step structure, i.e., There are bumps, the medial surface of magnetic shield 10 to match with the lateral surface shape of axis 1 for axis 1 and the contact surface of magnetic shield 10, because Magnetic shield 10 can be directly socketed on axis 1 by this, and without worrying that magnetic shield 10 can horizontally slip.The left end of magnetic shield 10 Face is abutted with the right side of 3rd bearing 19, and the right side of magnetic shield 10 is abutted with the circuit board 13 being arranged on axis 1.In order to So that circuit board 13 is not slided on axis 1, the mounting groove of the installation of power circuit board 13 is provided on the lateral surface of axis 1.Pass through 3rd bearing 19 further limits magnetic shield 10, so that magnetic shield 10 is steadily covered by 3rd bearing 19 and circuit board 13 It is connected on axis 1, does not generate sliding.The second annular groove is provided on the lateral surface of magnetic shield 10, the position of the second annular groove is located at The underface of first annular slot.Second annular groove and first annular slot are all coaxial with axis 1.In the second annular groove, from it is interior to It is socketed with the first antifreeze plate 14 and wireless power receiving coil 15 successively outside.Wireless power receiving coil 15 connects with circuit board 13 It connects, powers for circuit board 13.Wireless power receiving coil 15 can be rotated together with axis 1.
By first annular slot and the second annular groove, make to be socketed with successively from inside to outside between magnetic shield 10 and dirt-proof boot 8 First antifreeze plate 14, wireless power receiving coil 15, wireless power transmitting coil 17 and the second antifreeze plate 16, because first annular Slot and the second annular groove be coaxial and the second annular groove is located at the lower section of first annular slot, makes in the first antifreeze plate 14 and second every magnetic Wireless power receiving coil 15 between piece 16 forms coaxial and parallel thimble structure with wireless power transmitting coil 17, wirelessly Power supply transmitting coil 17 surrounds wireless power receiving coil 15.It is set on wireless power transmitting coil 17 and force-aid bicycle frame The driving circuit conducting wire connection set.It is generated by wireless power transmitting coil 17 according to Maxwell's Theory of Electromagnetic Field driving circuit The electric field of the electric field of variation, variation can evoke changing magnetic field, and by the resonance between coil, ray circle is received in wireless power The electric field for generating variation, achievees the effect that energy transmission.Because of wireless power transmitting coil 17 and wireless power receiving coil 15 Coil is parallel, always exists the magnetic flux of variation each other, therefore no matter whether coil rotates can generate electric current, Ensure the normal power supply of 1 moment inspecting system of axis.
By the first antifreeze plate 14, the resonance line for making wireless power transmitting coil 17 and wireless power receiving coil 15 constitute Circle is isolated with axis 1, is improved coil quality factor, is reduced the loss of energy transmission, improves the stability and one of product Cause property.By the second antifreeze plate 16, it is equivalent to outside resonance coil and is wound with one layer of magnetic separator, avoid the energy of resonance coil It measures to external radiation, reduces loss;Influence of the unlike material frame five-through pipe to product is reduced, the absorption of metal Five-way tube is reduced Energy, avoid the situation for causing system power dissipation unstable, ensure that homogeneity of product.
Wherein, the longitudinal section of the right end of dirt-proof boot 8 is also ladder step structure, and ladder step structure refers to having to be had as ladder There are the structure that right angle is bent, i.e. the right end integrated molding of dirt-proof boot 8 to be connected to the tubular structure that a diameter becomes smaller.Right bowl group 4 Inside contacted with the lateral surface of 8 right end of dirt-proof boot, i.e., right bowl group 4 compresses the right end of dirt-proof boot 8.The left end of dirt-proof boot 8 is direct It is abutted with the end face of left bowl group 22.The both ends of dirt-proof boot 8 are connected with left bowl group 22 and right bowl group 4 respectively, and composition one is in week Upward ring lives the unified whole of axis 1, and convenient and left bowl group 22 and right bowl group 4 together surround the device being connected on axis 1 Firmly, it can be connected firmly on axis 1.
The left end of installation set 9 and the longitudinal section of right end are all ladder step structure, and the left end and right end diameter of installation set 9 all subtract It is small, so that the left end lateral surface of installation set 9 is in contact with left 22 medial surface of bowl group, right end lateral surface and the dirt-proof boot 8 of installation set 9 Medial surface is in contact.First annular slot is provided on the lateral surface of installation set 9 on the position of left bowl group 22, in first annular slot It is socketed with wireless power transmitting coil 17 and the second antifreeze plate 16 successively from inside to outside.From a left side on the left end medial surface of installation set 9 It turns right and is connected with second bearing 18 and 3rd bearing 19 in turn, the inner ring of second bearing 18 and 3rd bearing 19 is contacted with axis 1, Installation set 9 is socketed in securely on axis 1 by 19 two bearings of second bearing 18 and 3rd bearing, while making installation set 9 It axis 1 can be moved relatively by second bearing 18 and 3rd bearing 19, so that installation set 9 is kept when axis 1 is in rotation It is static, so that the wireless power transmitting coil 17 being arranged in first annular slot is still arranged on force-aid bicycle frame And it is connect with driving circuit, wherein driving circuit is connect with the power supply for being arranged in vehicle frame etc..
It is provided with groove on the lateral surface that axis 1 is connect with left bowl group 22, the second clamp spring 20, the second card are connected with by groove Spring 20 between fourth bearing 21 and second bearing 18, support by the left side of fourth bearing 21 and the right side of the second clamp spring 20 It connects, the right side of second bearing 18 is abutted with the left side of the second clamp spring 20, and the second clamp spring 20 plays while limiting left bowl group 22 and installation set 9 work.Second clamp spring 20 can also be directly clamped with the inner ring of second bearing 18 and 3rd bearing 19, avoid making The inner ring of second bearing 18 and 3rd bearing 19 generates relative motion with axis 1.
In the present embodiment, double Hall subassemblies, the peace outside mounting groove are installed on the circuit board 13 in 1 mounting groove of axis There are one the multi-pole magnet-ring 11 with double Hall subassembly faces, multi-pole magnet-ring 11 and axis 1 are coaxial for installation on encapsulation 9.Double Hall groups Two switch Hall face multi-pole magnet-rings 11 in part.It is linear that bipolarity is installed on circuit board 13 in 1 mounting groove of axis Hall 26, there are one the two poles of the earth magnet ring 25 with 26 face of bipolarity linear Hall, the two poles of the earth for installation in the installation set 9 outside mounting groove Magnet ring 25 and axis 1 are coaxial.
Circuit board 13 in mounting groove is torque signals acquisition process plate makes torque signals adopt by mounting groove Collection processing board will not generate sliding on axis 1.
As shown in figure 3, being mounted at torque Acquisition Circuit and torque on torque signals acquisition process plate in the present embodiment Manage control circuit.Torque Acquisition Circuit and torque control and treatment circuit are installed on axis 1, as axis 1 rotates together.Together The wireless power receiving coil 15 on axis 1 is arranged by the electromagnetic induction with wireless power transmitting coil 17 to entire power in sample Square signal acquisition process plate is powered.
Wherein, torque Acquisition Circuit includes the 12 favour stone full-bridge of foil gauge of foil gauge Unit 12 composition, with foil gauge 12 Favour stone full-bridge connection the first amplifier unit, the first microcontroller being connect with the first amplifier unit, and with the first micro-control The first transmitting module of device connection processed being used for torque control and treatment circuit transmission telecommunications number.
Torque control and treatment circuit includes the first receiving module for being connect with the first transmitting module, is used for and first Second microcontroller of receiving module connection, current detector, the double Hall subassemblies for being used for connecting with the second microcontroller respectively With bipolarity linear Hall 26, and the second transmitting module for being connect with the second microcontroller.
Wherein, double Hall subassemblies include two unipolar switches for being used for detecting 1 rotation direction of stepping frequency and axis Hall, the two switch Halls are respectively first switch Hall 23 and second switch Hall 24, and wherein first switch Hall 23 is felt It answers the poles N, second switch Hall 24 to incude the poles S, is high level when first switch Hall 23 incudes the poles N, others are low Level, when first switch Hall 23 and the relative rotation of multi-pole magnet-ring 11, first switch Hall 23 forms one and indicates height electricity The rectangular wave of planometer rule variation.Equally, second switch Hall 24 is high level when sensing the poles S, and others are low level, when When second switch Hall 24 is relatively rotated with multi-pole magnet-ring 11, second switch Hall 24 forms one and indicates that low and high level rule becomes The rectangular wave of change.According to two unipolarity switch Halls formed potential diagram rising edge number, can Logical Deriving export scrunch Frequency.Because the installation site of first switch Hall 23 and second switch Hall 24 is arranged side by side, and two switch Hall senses The magnetic pole answered is different, therefore can be with Logical Deriving by the relative position of the rising edge of the potential diagram of two each self-formings of switch Hall Export the steering of axis 1.Using the prior art, when axis 1 rotates forward, the power supply power supply on moped, when axis 1 inverts When, the power cut-off on moped avoids the reversion of axis 1 from causing harmful effect to motor etc..
Bipolarity linear Hall 26, the poles N can be sensed but also sense the poles S by referring to, with induction magnetic pole difference and Bipolarity linear Hall 26 becomes different relative to the position of magnetic pole of the two poles of the earth magnet ring, and the voltage for continuously generating induction connects Continuous curve indicates, when half bowlder of the poles S and N extremely equal lengths, the voltage change that bipolarity linear Hall 26 senses is bent Line is sinusoidal or cosine curve.Using the logical calculated to sinusoidal or cosine curve, crank can be calculated in each electricity Corresponding rotational angle in pressure value, and the corresponding pedalling force size of each crank angle degree, and then can be to those arm of forces The pedalling force that very little is unable on the rotational angle position of accurate response pedalling force variation compensates.
Torque control and treatment circuit goes out pedalling force and sent according to pedalling force according to crank angle degree logical calculated to be accelerated Signal is spent to electric machine controller, and electric machine controller adjustment motor reaches the speed of electric machine theory output power.It is rotated by crank Angle reduction cyclist leg is applied to the pedalling force of moped, and the response brought because of the fluctuation of the arm of force is avoided to prolong Late, make cyclist when increasing pedalling force on any crank angle degree position, can access and timely respond to, improve cyclist Experience of riding.
The microcontroller of universal models may be used in the first microcontroller and the second microcontroller in the present embodiment.
In torque Acquisition Circuit, is rotated and generated by the axis 1 that 12 favour stone full-bridge of foil gauge detects foil gauge 12 Torsional moment size be changed into the deformation of foil gauge 12 and then be changed into the resistance variations of 12 favour stone full-bridge of foil gauge, by because The voltage signal that variation is synchronized for resistance variations passes to the first amplifier unit, is believed voltage change by the first amplifier unit Pass to the first microcontroller as torque acquisition module after number amplification, the first microcontroller is by this characterization torsional moment size Voltage change signal torque control and treatment circuit is sent to by the first transmitting module and the first receiving module.Torque processing control As the second microcontroller of torque processing module in circuit processed, table is obtained from torque Acquisition Circuit by the first receiving module The voltage signal of torsional moment size is levied, meanwhile, it is linear by the double Hall subassemblies and bipolarity that are connect with the second microcontroller Hall 26 obtains the electric signal of characterization stepping frequency and crank angle degree, and the second microcontroller is according to prior art logical calculated Go out stepping frequency.Second microcontroller will be turned round according to the torque size for indicating that the electric signal logical calculated of torsional moment size goes out Force square size is multiplied by stepping frequency and obtains the manpower output power of cyclist, then manpower output power is multiplied by assistant's ratio, obtains To electric machine theory output power.
Second microcontroller goes out crank angle degree according to arcsine or anticosine logical calculated.In the second microcontroller The pedalling force on this rotational angle position is exported according to crank angle degree Logical Deriving, the second microcontroller is according to pedalling force size Variation generate acceleration signal be sent to electric machine controller, make electric machine controller adjustment motor reach electric machine theory output power Speed.The pedalling force that cyclist leg is applied to moped is restored by crank angle degree, is avoided because of the arm of force The operating lag for fluctuating and bringing makes cyclist when increasing pedalling force on any crank angle degree position, can access It timely responds to, improves the experience of riding of cyclist.
Second microcontroller is by the second transmitting module and the second receiving module, by electric machine theory output power and acceleration Signal sends jointly to electric machine controller, so that electric machine controller is rotated according to electric machine theory output power motor, makes motor According to the actual demand of cyclist accurately power-assisted can be provided for moped.When the crank angle degree detected does not exist When in pre-stored rotational angle range value, torque size actual response at this time force of the cyclist to moped Situation, therefore logical calculated that directly torque size is multiplied with stepping frequency goes out manpower output power.
Because the torque Acquisition Circuit and torque control and treatment circuit in the present embodiment are all disposed on axis 1, Conducting wire connection may be used in connection between two circuits, i.e. the first transmitting module and the first receiving module are interconnection Conducting wire.And the second transmitting module and the second receiving module between torque control and treatment circuit and electric machine controller are channel radio Letter, the second transmitting module and the second receiving module can be bluetooth module, radio-frequency module or other channel radios being wirelessly connected Believe module.
In addition, the second microcontroller in torque control and treatment circuit is also associated with velocity sensor, the prior art is utilized Detect the travel speed of moped, and automatically selected according to travel speed be stored in advance in it is more in the second microcontroller A assist rate, each assist rate are traveling speed one-to-one with a travel speed value range, being arrived by contrasting detection Degree and travel speed value range choose the corresponding assist rate of travel speed as calculating current motor theory output power Key parameter participate in calculate.
The motor current signal detected is passed to the second microcontroller by the current detector in torque control and treatment circuit Device, the actual current and gone out by electric machine theory output power logical calculated that the second microcontroller comparison current detector detects Theoretical current value, increase or reduce output power of motor, enable motor according to moped actual travel situation come The power-assisted size of regulation motor ensures that cyclist is firmly effortless, and also power saving simultaneously.
The wireless power receiving coil 15 for generating electric current and torque signals acquisition process plate are separated in the present embodiment, it can The high-frequency signal that wireless power receiving coil 15 receives is isolated with the low frequency signal that torque signals acquisition process plate receives, is kept away Exempt from the interference acquired to torque signals.First antenna is installed on torque signals acquisition process plate, at torque signals acquisition The second antenna is installed on the axis 1 of reason backboard side, i.e., is mounted with torque signals acquisition process plate, torque letter in the side of mounting groove It is mounted with first antenna on number acquisition process plate, is mounted with second day at the back side of first antenna in the other side of mounting groove Line, two radio antennas are located in the opposite sides of 1 mounting groove of axis, and two radio antenna conducting wires are connected It is connected into the rotable antenna rotated together with axis 1, the shortcomings that present antenna back side because be blocked can not transmit is compensated for, makes The rotable antenna of formation can 360 deg carry out signal transmission in all directions.Meanwhile because there are two radio antenna, The intensity for strengthening aerial signal transmission, especially when axis 1 rotates, it is closer from obtaining that always there are one radio antennas, And because two antennas can gamut radiation, effectively increase the continuity and signal strength of signal transmission, ensure that axis 1 exists Data are not lost in rotary course, it is ensured that the accuracy of data acquisition improves sensitivity and the stability of system.
It is connected to the snakelike cabling on axis 1 of the conducting wire between first antenna and the second antenna and is wound a coil, Ensure that the external world in rotation process of axis 1 can be not in dead angle, while coil also plays and fixes second day with normal communication The effect of line.
First antenna and the second antenna in the present embodiment are two transmitting terminals of the second transmitting module, and torque processing is controlled The electric machine theory output power that circuit counting processed goes out passes to electric machine controller.
In the present embodiment, current detector can directly use operational amplifier circuit, be acquired by the direct AD of operational amplifier circuit.It is exactly A faint voltage signal is acquired, after amplifier is amplified, acquires that in filtered algorithm to obtain current of electric big by AD It is small.Current detector can be regarded to the second amplifier unit as, the second amplifier unit and the first amplifier unit are the same, directly using packet Existing amplifier chip containing operational amplifier circuit.
As shown in figure 4, the multi-pole magnet-ring 11 in the present embodiment shares 48 magnetic poles, that is, have 24 to pole, One includes the poles N and the poles S to pole.On entire multi-pole magnet-ring 11 one to pole one pole is disposed adjacent, i.e., the poles N and The poles S are spaced setting on entire multi-pole magnet-ring 11.When two switch Halls are when following axis 1 to rotate together, two switches are suddenly You can sense continually changing magnetic pole on multi-pole magnet-ring 11.Because the poles N and the poles S are spaced, switched by two The number that the number and the poles S that the poles N that Hall is respectively induced occur occur, is able to detect that the stepping frequency of moped. Two switch Halls according to the characteristic of itself, occur N and the poles S whens be high level, remaining is low level, Neng Goushi When form the detection trajectory diagram of the poles N and the poles S, the phase difference by forming trajectory diagram can judge the steering of axis 1.Example Such as, the rising edge of first switch Hall trajectory diagram corresponds to second switch Hall signal when axis 1 rotates clockwise High level, the failing edge of first switch Hall corresponds to the low level of the signal of second switch Hall.And work as 1 inverse time of axis The rising edge of first switch Hall corresponds to the low level of second switch Hall signal when needle rotates, first switch Hall Failing edge corresponds to the high level of second switch Hall signal.The prior art is used for detecting stepping frequency and generally uses magnet steel, magnetic The steel capital is discontinuous, needs respectively to install the magnet steel of different magnetic poles, troublesome in poeration, complex process.Because of multipole magnetic Ring 11 is an entirety, easy for installation, and each magnetic pole all fixes on multi-pole magnet-ring 11, and relative position will not change, Keep detection more accurate, thus use multi-pole magnet-ring 11, compared with the prior art in use magnet steel, not only simplify erector Skill also improves detection sensitivity;Coordinate with double Halls, can not only calculate and step on frequency, 1 rotation direction of axis can be detected, simplifies Structure, it is cost-effective.
In order to make switch Hall be more precisely carried out detection, when installing switch Hall, by two switch Halls Corresponding one makes another switch Hall pair to pole when one of switch Hall is aligned this to the extremely middle poles N center The intersection of the neat poles N and adjacent S pole can maximize avoid magnetizing fluctuation and Hall patch is swung leads to following logic in this way Confusion because theoretically the poles N and the poles S are magnetized uniformly, but really has fluctuation, and switch Hall relative position is in batch Error is also likely to be present when patch.Two switch Halls are installed according to the method for front, error can be avoided to the maximum extent.
As shown in figure 5, the two poles of the earth magnet ring 25 in the present embodiment includes the poles S of semicircular in shape shape and one is in semicircle The poles N of shape, bipolarity linear Hall 26 are arranged in the two poles of the earth magnet ring 25.When bipolarity linear Hall 26 is followed by 1 turn of axis When dynamic, bipolarity linear Hall 26 can incude the poles N and the poles S along the medial surface of the two poles of the earth magnet ring 25, because of the length of the poles N and the poles S Spend it is equal, bipolarity linear Hall 26 incude magnetic pole formed potential diagram be a sine or cosine curve.It is bent by calculating The slope of line can accurately calculate the rotational angle of each moment crank, so level off in those arm of forces 0 position, it is right Torque size compensates, when making over these locations, 1 moment inspecting system of axis through this embodiment can it is sensitive and When react to the variation of the torsion of cyclist, so that the power-assisted that moped provides is disclosure satisfy that the practical need of cyclist It asks.
As depicted in figs. 1 and 2,6 left end of deformation bridge is threaded togather by reverse thread and axis 1;Deformation bridge 6 is right End is connect with claw 3 by trench structure or dentalation, and the right end of claw 3 is equipped with the locking being threadedly coupled with deformation bridge 6 Nut 2 is compressed claw 3 and deformation bridge 6 by locking nut 2.The fluted disc of moped to split nut by being fixed on card On pawl 3.
Specifically, deformation bridge 6 is a tubular structure that is coaxial with axis 1 and being sleeved on outside axis 1, the left end of deformation bridge 6 Equipped with reversed internal thread, the left end of deformation bridge 6 is linked together by reverse thread structure and axis 1.The right end of deformation bridge 6 is outstanding The empty gap for having very little with axis 1, the right end lateral surface of deformation bridge 6 are equipped with the dentalation outwardly protruded, and right end passes through tooth Shape structure is connect with fluted disc, can ensure that the power of the right and left is transmitted to fluted disc to reach double-side torque by deformation set in this way Effect.
Wherein, deformation bridge 6 is divided into N equal portions by deformation bridge 6 along 1 axis direction of axis, in the deformation of each equal portions Bridge 6 all has exterior surface area of the same area and identical volume.Be bonded on the deformation bridge 6 of each equal portions identical quantity and The foil gauge 12 of shape.Specifically, as shown in Fig. 2, pasting foil gauge 12 in deformation bridge 6 and 1 connecting portion outer ring of axis, individually The projecting direction angle at 45 ° of foil gauge 12 and 1 axis of axis, two foil gauges 12 form a half-bridge, i.e., in each equal portions The outer surface of deformation bridge 6 all paste a half-bridge.In the present embodiment, by 6 liang of equal portions of deformation bridge, then having pasted one and half After bridge, it is rotated further by 180 ° of position and pastes the composition half-bridge of a pair of of foil gauge 12 again in the manner described above, two groups of half-bridges form one entirely Bridge;Although it is now generally in the art that this, which pastes direction and angle, present embodiment ensure that inferior the case where intensity Part deformation bridge 6 reduces 12 quantity of foil gauge by structure optimization, unlike other existing deformation bridges 6 need on each position Foil gauge 12 is all pasted, only needs to paste one group of foil gauge 12 on the outer surface of each equal portions in the present embodiment, reduce Cost and ensure acquisition precision.Using deformation bridge 6 in the present embodiment, after collecting foil gauge 12 and transmitting the stress come, First by Amplification, detection sensitivity is improved;Reducing heat treatment or machining leads to 6 case hardness of deformation bridge or thickness The uneven influence to stress distribution is spent, homogeneity of product is improved.
The present embodiment posts foil gauge 12 in deformation bridge 6 and 1 connecting portion outer ring of axis, single foil gauge 12 with it is axial at 45 °, two composition half-bridges;It is rotated further by 90 ° of position and pastes the composition half-bridge of a pair of of foil gauge 12, two groups of half-bridges again in the manner described above A full-bridge is formed, the first microcontroller is input to after the amplification of the first amplifier unit, converses corresponding force size;In this way may be used To avoid because deformation bridge 6 process it is uneven caused by stress Acquisition Error.It is pasted on 6 circumference of deformation bridge in compared with the prior art The way of full foil gauge 12, the present embodiment not only reduces the quantity of foil gauge 12, reduces cost, also by dividing equally deformation bridge 6 circumferential area makes to be detected there are one foil gauge 12 on each position being divided equally, and then can ensure deformation bridge 6 There is the foil gauge 12 of detection in all directions, as long as respectively reasonable quantity, then can effectively be protected on the basis of reducing cost Demonstrate,prove the accuracy of detection of deformation bridge 6.
When cyclist tramples left/right crank, power all can be transmitted to deformation bridge 6 by axis 1, pass through deformation bridge 6 It is transmitted to claw 3 again, claw 3 is rotated with active toothed disk.The stress intensity above deformation bridge 6, foil gauge are acquired by foil gauge 12 Collected transformation for stress is passed to the first microcontroller by 12 for electric signal by the first amplifier unit, and the first level controller will It passes to the second microcontroller, and it is big that the second microcontroller by conversion obtains cyclist's size i.e. torsional moment of currently exerting oneself It is small, torsional moment is calculated in conjunction with the arm of force being stored in advance in the second microcontroller on each crank angle degree position, Torsional moment is multiplied by the stepping frequency that double Hall subassemblies detect and the coefficient value being stored in advance in the first microcontroller, meter Calculating obtains current manpower output power.It is previously stored with assist rate in second microcontroller and corresponds to table, assist rate corresponds in table Including multigroup travel speed being arranged in a one-to-one correspondence and assist rate.It can determine by the travel speed that velocity sensor detects The assist rate currently needed, torque control and treatment circuit should be provided according to assist rate and when the output power of forefathers calculates motor Theoretical output power, the theoretical current value of motor is further calculated out, by electric machine controller according to theoretical output power control Motor speed processed and then the power-assisted size that motor offer is provided.By compare the motor actual current that detects of current detector and Theoretical current value carrys out the rotating speed of real-time regulation motor.
Meanwhile going out the angle of rotation of each moment crank by the two poles of the earth magnet ring 25 and 26 logical calculated of bipolarity linear Hall Degree, pre-set formula logical calculated can go out each crank angle degree by this rotational angle from the second microcontroller On pedalling force, pass through the compensation method that is stored in advance on the second microcontroller and compensate pedalling force and form an acceleration letter Number, allow electric machine controller according to this acceleration.Specific compensation method can be that proportional increase or reduction motor turn Dynamic speed can also be some other logical calculateds to control the speed of motor rotation.Pass through the two poles of the earth magnet ring 25 and bipolarity Linear Hall 26 can avoid causing the torque signals of acquisition and people actually firmly variant because the compensation arm of force moves in a circle The case where, synchronism between human and machine is improved, people is avoided to have an effect suddenly in the minimum place of the arm of force, sensor low-response or without response Problem.
Each assist rate obtained according to current driving speed is a definite value, and occurrence is carried out according to respective standard Setting.People rides in different road conditions needs different power, according to the assist rate that mark the inside requires, controls people and motor Output power relationship, it is firmly effortless to ensure that bicyclist rides.
In the market most prior art scheme can not precise acquisition torque, accurately controlled so cannot reach, Jin Erwu The output power of people is accurately calculated in method, and motor can not be made to provide rational power-assisted, very bad body is caused to cyclist Test sense.
The scheme of rotating speed is only detected in compared with prior art, the present embodiment can detect rotating speed and torque simultaneously, and can Accomplish the precise acquisition to torque, Torque Control core is how to calculate stabilization and accurate people tramples power and motor is defeated Go out power, how deformation bridge 6 by equal portions and is pasted foil gauge 12 and ensure that power acquires uniform essence by us in structure design Really, ensure the accurate of motor power calculation further through hardware circuit and software filtering, to reach a dynamic flat by adjusting in real time Weighing apparatus.When motor is under the control of electric machine controller, after being rotated according to certain electric machine theory output power, setting is in motor On current detector by electric current of the motor in rotation process be detected and by actual current value feed back to torque handle mould Block.The second microcontroller in torque processing module is compared according to by actual current value and theoretical current value, if the two is not So that actual current value and theoretical current value is tended to be equal by adjusting the theoretical output power of motor when the same, is adjusting The rotating speed of motor is adjusted while output power of motor, and then the power-assisted for making motor generate is adjusted, entire moment inspecting, control System and adjusting form a closed loop, and the adjusting of motor power-assisted is made to reach a dynamic equilibrium.Briefly, calculate people's first Output power detects output power of motor by current collector, output power of motor is increased or reduced to adjust by comparing.
It is detected by the current feedback and crank turned position that introduce motor in the present embodiment, improves the response time and ride Row comfort level ensures that cyclist exerts oneself effortless while more power saving.
In the fixation to sleeve, especially in the fixation of installation set 9, the present embodiment is using bearing instead of traditional Wear-resistant pad or clamp spring, making entire axis 1, almost upper no frictional force generates, effectively reduce because overcoming self friction power and The energy of consumption.Specifically increase a ring stiffener by left side place in turnbarrel, by respectively pacifying at reinforcing rib both ends A bearing is filled, and adds a clamp spring to be close to left end bearing on axis 1, in this way rotation plastic cement cylinder in Axis 1 is fixed together.Original wear-resistant pad is substituted, sliding friction Variable roll is rubbed, the service life of wear-out part is extended, reduces Frictional resistance reduces the loss in power transmittance process, improves accuracy of detection, extends life of product;Bearing is reduced to exist With the axis of sleeve/radially wobble in rotation process, the fluctuation of mutual induction amount between two resonance coils is reduced, reduces energy biography Defeated fluctuation improves the stability and consistency of product.
In the art, people are in fixes sleeve, and universal means and inertial thinking are exactly in one end of sleeve with one A bearing is fixed, and is limited the position of sleeve by increasing clamp spring on axis 1 in the other end of sleeve, still, is easy in this way Cause to generate friction between clamp spring and sleeve, being used for a long time can make the gap between clamp spring and sleeve increasing.The present embodiment It is to add two bearings in the same side of installation set 9, i.e., second bearing 18 and 3rd bearing 19 are simultaneously installation set 9 and magnetic shield 10 It clamps, the second clamp spring 20 is clamped between fourth bearing 21 and second bearing 18, and the second clamp spring 20 will not be with second bearing 18 Outer ring contact, resistance caused by reducing phase mutual friction centering axis 1 improves the service life of product.Second bearing 18 and third For bearing 19 while more steadily connecting installation set 9 with axis 1,3rd bearing 19 and the abutting of magnetic shield 10 are also fine Ground plays position-limiting action to magnetic shield 10.
Deformation bridge 6 is connect with axis 1 by reverse thread structure, substitutes original dentalation make-up, ensure axis 1 with Seamless connectivity between deformation bridge 6 avoids dentation from docking the shake during positive and negative rotation, ensures the accuracy of data acquisition, and It is easy for installation.
Rotation multi-pole magnet-ring 11 substitutes existing magnetic steel structure, simplifies mounting process, improves detection sensitivity;With double Hall groups Part coordinates, and can not only calculate stepping frequency, can also detect 1 rotation direction of axis, simplifies structure, cost-effective.
Axis 1 rotates always in use, and the present embodiment uses wireless power and communication, on axis 1 Face is wound with resonance coil, and resonance coil is wound with one layer of antifreeze plate both above and below, and antifreeze plate maintains an equal level with coil or be higher than coil, By antifreeze plate coil and axis 1 and surrounding metal part, such as bearing isolation, reduce wireless power energy loss.
In the present embodiment, multi-pole magnet-ring 11 and double Hall subassemblies are followed by the rotation of axis 1 and synchronous generation relative motion, So that two unipolarity switch Halls in double Hall subassemblies is obtained the potential diagram of induction generation by incuding the poles S and the poles N, leads to Rising edge number Logical Deriving in overpotential figure exports stepping frequency.The torsion for making axis 1 rotate is passed to by deformation bridge 6 Foil gauge Unit 12 detects the torsional moment size electric signal of characterization axis 1 by foil gauge Unit 12 and passes electric signal Circuit board 13 is passed, circuit board 13 shifts out torsional moment size onto by logic.The torsional moment size detected is multiplied by power Arm just obtains torsional moment.The detection of the arm of force uses the prior art.
When riding moped, manpower output power P=K*N*F, K are constant, and N is torsional moment, and F is to scrunch frequency Rate;The output power that cyclist is currently applied to moped is conversed using the product of stepping frequency and torsional moment, and It is multiplied by manpower output power according to assist rate, the theoretical output power of motor can be calculated, according to electric machine theory output power Control motor is rotated, and power-assisted is provided to moped.
Cyclist makes crank move in a circle when scrunching foot pedal, forms the motive torque that cyclist is applied to crank, Crank drives central axis in rotation process, forms the torsional moment of axis.However, crank is turning to certain rotational angles When, because of effective arm very little, the pedalling force for making one to scrunch foot pedal can not be all for forming motive torque, if at this On a little rotational angle positions, if cyclist increases prodigious torsion suddenly, collected torque signals still very little, at this time without Method is really exerted a force requirement by torque size to react cyclist.The variation meeting very little of motive torque, and then make the torsion of axis Force square can not accurately and timely respond, and give cyclist very bad experience of riding.And existing axis moment inspecting system There is no take any effective measures for this problem for system.By the two poles of the earth magnet ring and bipolarity linear Hall 26, make this two A device synchronizes generation relative motion with the rotation of axis 1, and bipolarity linear Hall 26 is enable to pass through to the two poles of the earth magnet ring The detection of the upper poles N and the poles S forms the electric signal for being used for characterizing crank angle degree, and electric signal is sent to circuit board 13, electricity Road plate 13 derives the rotational angle of current crank by logical calculated.For cyclist when scrunching foot pedal, people is in the mistake trampled Crank is moving in a circle in journey, and when being trampled with same power, collected torque signals are a sine wave (parts y >=0 weeks Phase is π), it is directly mended according to the size of the pedalling force of recovery when arm of force very little by the detection to crank position It repays, improves the real-time of the sensitivity of moment inspecting and system response when people has an effect suddenly, enable the timely root of moped Power-assisted is provided according to Man's Demands are cycled, improves comfort level of riding.And these no functions of the existing torque sensor in market, so In the reinforcing suddenly of the minimum place of the arm of force, response is very slow.
The ingenious setting multi-pole magnet-ring 11 of the present embodiment and double Hall subassemblies make double Hall subassemblies be able to detect that and scrunch frequency Rate goes out torque size by logical calculated, and the output power to obtain 1 torque of axis and people detects necessary parameter.This hair Bright ingenious setting the two poles of the earth magnet ring 25 and bipolarity linear Hall 26 make axis 1 when because torsion generates rotation, and bipolarity is linear Hall 26 by incude the pole change on the two poles of the earth magnet ring 25 obtain voltage change of the crank in rotation process sinogram or Person's cosine figure, the angle of current crank and axis 1 is gone out by logical calculated.It, being capable of basis in conjunction with the torque size calculated The turned position of crank calculates size of the crank at this time with torsion on the angle of axis 1 and axis 1.
The present embodiment, ingenious setting multi-pole magnet-ring and double Hall subassemblies and the two poles of the earth magnet ring and bipolarity linear Hall, no Only moped can be made accurately to provide power-assisted according to the actual demand of cyclist, additionally it is possible to present torque effectively be avoided to examine The problem of examining system leads to response system low-response because of crank angle degree.
The article connected on the entire axis of the present embodiment is connected by bearing, in this way sleeve in Axis is fixed together.Original wear-resistant pad is substituted, sliding friction Variable roll is rubbed, the service life of wear-out part is extended, reduces Frictional resistance reduces the loss in power transmittance process, improves accuracy of detection, extends life of product;Bearing is reduced to exist With the axis of sleeve/radially wobble in rotation process, reduce between wireless power transmitting coil and wireless power receiving coil mutually The fluctuation of sensibility reciprocal reduces the fluctuation of energy transmission, improves the stability and consistency of product.
The present embodiment by magnetic shield, can by wireless power transmitting coil and wireless power receiving coil with power-assisted voluntarily Other metal structures of vehicle, such as vehicle frame, bearing, axis are all kept apart, and coil can be avoided to produce electricl energy to the maximum extent Loss.
Embodiment 2:
As shown in fig. 6, the present embodiment is with embodiment 1, difference lies in double Hall subassemblies and bipolarity linear Hall 26 connect It is connected in torque Acquisition Circuit, the first microcontroller obtains characterization stepping frequency and axis 1 rotation direction from double Hall subassemblies Electric signal, the first microcontroller obtain the electric signal of characterization crank angle degree from bipolarity linear Hall 26, and these are electric Signal passes to torque control and treatment circuit.Two circuits can be together arranged on axis 1 at this time, can also be provided separately, Torque Acquisition Circuit is arranged on axis 1 and torque control and treatment circuit is arranged in installation set 9.When torque Acquisition Circuit and power When square control and treatment circuit is provided separately, the first transmitting module and the first receiving module are wireless transport module, first day Line and the second antenna are exactly two transmitting terminals of the first transmitting module.
Embodiment 3:
As shown in fig. 7, the present embodiment is with embodiment 1, difference lies in double Hall subassemblies and foil gauge Unit 12 are connected to In torque Acquisition Circuit, the first microcontroller obtains the telecommunications of characterization stepping frequency and 1 rotation direction of axis from double Hall subassemblies Number, bipolarity linear Hall 26 is connected in torque control and treatment circuit, and the second microcontroller is obtained from bipolarity linear Hall 26 To the electric signal of characterization crank angle degree.Two circuits can be together arranged on axis 1 at this time, can also be provided separately, Torque Acquisition Circuit is arranged on axis 1 and torque control and treatment circuit is arranged in installation set 9.When torque Acquisition Circuit and power When square control and treatment circuit is provided separately, the first transmitting module and the first receiving module are wireless transport module, first day Line and the second antenna are exactly two transmitting terminals of the first transmitting module.
Embodiment 4:
As shown in figure 8, the present embodiment is with embodiment 1, difference lies in bipolarity linear Hall 26 and foil gauge Unit 12 It is connected in torque Acquisition Circuit, the first microcontroller obtains the telecommunications of characterization crank angle degree from bipolarity linear Hall 26 Number.Double Hall subassemblies are connected in torque control and treatment circuit, and the second microcontroller obtains characterization from double Hall subassemblies and scrunches frequency The electric signal of 1 rotation direction of rate and axis.Two circuits can be together arranged on axis 1 at this time, can also be provided separately, power Square Acquisition Circuit is arranged on axis 1 and torque control and treatment circuit is arranged in installation set 9.When torque Acquisition Circuit and torque When control and treatment circuit is provided separately, the first transmitting module and the first receiving module are wireless transport module, first antenna It is exactly two transmitting terminals of the first transmitting module with the second antenna.
Embodiment 5:
As shown in Fig. 9, Figure 10 and Figure 11, the present embodiment difference from Example 1 is, the setting of torque Acquisition Circuit exists On axis 1, torque control and treatment circuit is arranged in installation set 9.
Mounting torque signal acquiring board, multi-pole magnet-ring 11 and the two poles of the earth magnet ring 25 on axis 1 are pacified on torque signals collection plate Torque Acquisition Circuit has been filled, first antenna is installed on torque signals collection plate, it is opposite with torque signals collection plate on axis 1 Side on the second antenna is installed, two radio antennas are connected to form rotable antenna with conducting wire.In installation set 9 Mounting torque signal-processing board installs moment control and treatment circuit in torque signals processing board.Meanwhile torque signals processing board On be mounted with to emit the antenna receiving module of signal for receiving first antenna and the second antenna, antenna receiving module adopts torque Collector transmits the signal come and passes to the second microcontroller as torque processing module.It is mounted in torque signals processing board Two with the switch Hall of 11 face of multi-pole magnet-ring, respectively first switch Hall 23 and second switch Hall 24.Torque signals The bipolarity linear Hall 26 with 25 face of the two poles of the earth magnet ring is mounted in processing board.Double Hall subassemblies at this time are located at multi-pole magnet-ring Outside 11, bipolarity linear Hall 26 is located at outside the two poles of the earth magnet ring 25.First antenna and the second antenna are two of the first transmitting module Transmitting terminal.
Embodiment 6:
Difference from Example 1 is that the both ends of dirt-proof boot 8 are ladder step structure, the i.e. diameter at the both ends of dirt-proof boot 8 Less than the diameter of middle section so that it is convenient to which the both ends of dirt-proof boot 8 are connected with left bowl group 22 and right bowl group 4 respectively, it is convenient and Left bowl group 22 and right bowl group 4 together surround the device being connected on axis 1, can be connected firmly on axis 1.
Embodiment 7:
Difference from Example 1 is, the circuit board 13 in mounting groove include the power panel being separated from each other and Torque signals acquisition process plate is mounted with torque Acquisition Circuit and torque control and treatment circuit on torque signals acquisition process plate. Power panel is electrically connected with wireless power receiving coil 15, and power panel is electrically connected with torque signals collection plate, and power panel is believed for torque The power supply of number acquisition process plate.Power panel and torque signals collection plate are all sleeved in mounting groove side by side.In power panel and torque signals It is connected between acquisition process plate and magnetic sheet is isolated for interference third is isolated.By power panel and torque signals acquisition process plate point It opens, high-frequency signal can be isolated, avoid the interference to signal acquisition.
Embodiment 8:
It is in place of the difference of embodiment 1, the second clamp spring 20 and the inner ring of second bearing 18 are fixed, and second bearing 18 is made It does not produce relative rotation with the second clamp spring 20, reduces phase mutual friction and form the resistance for hindering axis 1 to rotate, improve the product whole longevity Life.
Embodiment 9:
Be in place of the difference of embodiment 1, the second clamp spring 20 inner ring with second bearing 18 and fourth bearing 21 respectively It is fixed, so that the inner ring of second bearing 18 and fourth bearing 21 relative to rotation is generated will not be all avoided that phase mutual friction is caused to form resistance The resistance for hindering axis 1 to rotate improves product bulk life time.
Embodiment 10:
It is in place of the difference of embodiment 1, rotational angle range value is previously provided in the second microcontroller, rotates Angular range value is the too small corresponding rotational angle set in position of those arm of forces.When what the second microcontroller logical calculated went out turns When dynamic angle is in rotational angle range value, the second microcontroller is according to the electric signal logical calculated for indicating torsional moment size The torsional moment size gone out.Torque control and treatment circuit calculates manpower output power by stepping frequency and torsional moment size Afterwards, torque control and treatment circuit exports the pedalling force that leg is applied to crank according to crank angle degree Logical Deriving, by scrunching The size variation of power proportionally increases or reduces manpower output power, and then is gone out than logical calculated according to assistant revised Electric machine theory output power, i.e. motor synthesize output power, and motor synthesis output power is sent to electric machine controller control electricity Machine rotates, and restoring cyclist leg by crank angle degree is applied to the pedalling force of moped, and then passes through pedalling force It corrects torsional moment size and forms resultant moment size, the crank brought because of the fluctuation of the arm of force is avoided to be transmitted on axis Power error makes cyclist when changing pedalling force on any crank angle degree position, regulation motor can provide in time Power-assisted, improve the experience of riding of cyclist.
Above-described is only the embodiment of the present invention, and the common sense such as well known concrete structure and characteristic are not made herein in scheme Excessive description, technical field that the present invention belongs to is all before one skilled in the art know the applying date or priority date Ordinary technical knowledge can know the prior art all in the field, and with using routine experiment hand before the date The ability of section, one skilled in the art can improve in conjunction with self-ability and implement under the enlightenment that the application provides This programme, some typical known features or known method should not implement the application as one skilled in the art Obstacle.It should be pointed out that for those skilled in the art, without departing from the structure of the invention, can also make Go out several modifications and improvements, these should also be considered as protection scope of the present invention, these all do not interfere with the effect that the present invention is implemented Fruit and patent practicability.The scope of protection required by this application should be based on the content of the claims, the tool in specification The records such as body embodiment can be used for explaining the content of claim.

Claims (8)

1. the method for transmitting signals of axis moment measuring device, it is characterised in that:Including the following contents:The electricity being arranged on axis Road plate, by torque Acquisition Circuit receive be arranged on deformation bridge strain blade unit transmission come electric signal and its logic is changed It is counted as torque size, torque Acquisition Circuit receives two Hall elements and transmits the pulse signal come and be converted into stepping frequency in The rotation direction of axis, and these electric signals are sent to torque processing by the first antenna being arranged on axis and the second antenna Control circuit;Torque control and treatment circuit according to from torque Acquisition Circuit transmit come torque size, stepping frequency and rotation side Go out electric machine theory output power to logical calculated and sends electric machine controller to.
2. the method for transmitting signals of axis moment measuring device, it is characterised in that:Including the following contents:The electricity being arranged on axis Road plate, by torque Acquisition Circuit receive be arranged on deformation bridge strain blade unit transmission come electric signal and its logic is changed It is counted as torque size, torque Acquisition Circuit receives two Hall elements and transmits the pulse signal come and be converted into stepping frequency in The rotation direction of axis, and these electric signals are sent to torque control and treatment circuit by conducting wire;Torque control and treatment circuit root Go out electric machine theory output power according to torque size, stepping frequency and the rotation direction logical calculated come is transmitted from torque Acquisition Circuit And electric machine controller is sent to by first antenna and the second antenna.
3. the method for transmitting signals of axis moment measuring device, it is characterised in that:Including the following contents:The electricity being arranged on axis Road plate, by torque Acquisition Circuit receive be arranged on deformation bridge strain blade unit transmission come electric signal and its logic is changed It is counted as torque size and torque control and treatment circuit is passed to by first antenna and the second antenna;Torque control and treatment circuit connects It receives two Hall elements and transmits the pulse signal come and the rotation direction for being converted into stepping frequency and axis;Torque processing control electricity Road goes out electric machine theory output power according to stepping frequency, the rotation direction of axis and torque size logical calculated and passes through conducting wire Send electric machine controller to.
4. the method for transmitting signals of axis moment measuring device according to claim 1 or 2, it is characterised in that:Middle shaft rotation Dynamic, the deformation bridge being arranged on axis deforms upon, and interconnecting piece and the axis of deformation bridge and axis rotate together, and deformation bridge hangs Deformation is passed to the strain blade unit being arranged on deformation bridge by empty portion;Strain blade unit detects the deformation quantity of deformation bridge and will Deformation quantity is converted into electric signal and passes to torque Acquisition Circuit;
While central axis, the double Hall subassemblies being arranged on axis are arranged as axis rotates together in installation set Relative motion occurs for magnet ring and double Hall subassemblies of face;Two unipolarity Hall elements in double Hall subassemblies edge respectively The circumference for magnet ring does relative motion, and two Hall elements are respectively induced the poles N being continuously arranged on magnet ring and the poles S and form pulse Signal transmission gives torque Acquisition Circuit.
5. the method for transmitting signals of axis moment measuring device according to claim 1 or 2 or 3, it is characterised in that:Setting Wireless power receiving coil and wireless power transmitting coil between dirt-proof boot and magnetic shield be used for as torque Acquisition Circuit and Torque control and treatment circuit is powered;Wireless power receiving coil and wireless power transmitting coil be coaxial and wireless power receiving coil In wireless power transmitting coil;Between wireless power transmitting coil and dirt-proof boot and wireless power receiving coil with every magnetic Antifreeze plate is both provided between set.
6. the method for transmitting signals of axis moment measuring device according to claim 1 or 2 or 3, it is characterised in that:First Antenna and the second antenna are communicated by the conducting wire being wrapped on axis.
7. the method for transmitting signals of axis moment measuring device according to claim 6, it is characterised in that:Connection first day The serpentine-like cabling of the conducting wire of line and the second antenna, which is wrapped on axis, forms loop, is tied up the second antenna in by loop On axis.
8. the method for transmitting signals of axis moment measuring device according to claim 3, it is characterised in that:Central axis, The deformation bridge being arranged on axis deforms upon, and interconnecting piece and the axis of deformation bridge and axis rotate together, deformation bridge it is hanging Deformation is passed to the strain blade unit being arranged on deformation bridge by portion;Strain blade unit detects the deformation quantity of deformation bridge and by shape Variable is converted into electric signal and passes to torque Acquisition Circuit;
While central axis, the magnet ring being arranged on axis is as axis rotates together, double Halls for being arranged in installation set Relative motion occurs for component and the magnet ring of face;Two unipolarity Hall elements in double Hall subassemblies are respectively along magnet ring Circumference do relative motion, two Hall elements be respectively induced the poles N being continuously arranged on magnet ring and the poles S and formed pulse signal biography It is defeated by torque Acquisition Circuit.
CN201810428671.6A 2018-05-07 2018-05-07 The method for transmitting signals of axis moment measuring device Pending CN108688765A (en)

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Cited By (2)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
CN113086079A (en) * 2021-05-20 2021-07-09 安乃达驱动技术(上海)股份有限公司 Torque sensor and electric power-assisted bicycle
CN115037335A (en) * 2021-03-05 2022-09-09 浙江荷清柔性电子技术有限公司 Near-field induction type wireless communication system

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EP1160556B1 (en) * 2000-05-16 2007-01-24 Sew-Eurodrive GmbH & Co. KG System for the measurement of torque, axial and/or lateral force and temperature of an axle or a rotatable shaft, and method of process control for such a system
CN101890691A (en) * 2009-04-16 2010-11-24 前田金属工业株式会社 wireless data transceiving system
CN205664845U (en) * 2016-05-19 2016-10-26 昆山朗德森机电科技有限公司 Sensor device is frequently stepped on to integral type axis
CN107336793A (en) * 2017-07-04 2017-11-10 河北工业大学 Moped axis torque sensor
CN107628186A (en) * 2017-07-27 2018-01-26 新安乃达驱动技术（上海）股份有限公司 Axis torque sensor and electric booster bicycle

Patent Citations (5)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
EP1160556B1 (en) * 2000-05-16 2007-01-24 Sew-Eurodrive GmbH & Co. KG System for the measurement of torque, axial and/or lateral force and temperature of an axle or a rotatable shaft, and method of process control for such a system
CN101890691A (en) * 2009-04-16 2010-11-24 前田金属工业株式会社 wireless data transceiving system
CN205664845U (en) * 2016-05-19 2016-10-26 昆山朗德森机电科技有限公司 Sensor device is frequently stepped on to integral type axis
CN107336793A (en) * 2017-07-04 2017-11-10 河北工业大学 Moped axis torque sensor
CN107628186A (en) * 2017-07-27 2018-01-26 新安乃达驱动技术（上海）股份有限公司 Axis torque sensor and electric booster bicycle

Cited By (2)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
CN115037335A (en) * 2021-03-05 2022-09-09 浙江荷清柔性电子技术有限公司 Near-field induction type wireless communication system
CN113086079A (en) * 2021-05-20 2021-07-09 安乃达驱动技术(上海)股份有限公司 Torque sensor and electric power-assisted bicycle

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