CN109849595A - Tire pressure monitoring system, transmitter and tire pressure monitoring method - Google Patents
Tire pressure monitoring system, transmitter and tire pressure monitoring method Download PDFInfo
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- CN109849595A CN109849595A CN201910234385.0A CN201910234385A CN109849595A CN 109849595 A CN109849595 A CN 109849595A CN 201910234385 A CN201910234385 A CN 201910234385A CN 109849595 A CN109849595 A CN 109849595A
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Abstract
This application discloses a kind of tire pressure monitoring systems, the system includes: multiple transmitters and receiver, when any transmitter receipt is to low frequency wake-up signal, then the tire pressure data of transmitter transmitting tyre pressure sensor detecting are to receiver, so that the pressure of the tire where receiver monitoring emitter；When any transmitter does not receive low frequency wake-up signal, then the acceleration information of tire where position sensing device detects it is made in the control circuit control in transmitter by oneself, gain amplification disposal is carried out to obtain corresponding acceleration information, and the tire pressure data for acceleration information and the tyre pressure sensor detecting that will acquire emit to receiver, so that receiver determines the orientation of the tire where transmitter, and the pressure of the tire where monitoring emitter according to the acceleration information received.The application further correspondingly discloses a kind of transmitter and a kind of tire pressure monitoring method.Tire pressure monitoring system provided by the present application can reduce system power consumption and improve the accuracy of the self-positioning result of tire.
Description
Technical field
This application involves technical field of automotive electronics, more particularly to a kind of tire pressure monitoring system, transmitter and tire pressure
Monitoring method.
Background technique
Tire pressure monitoring system (Tire Pressure Monitoring System, TPMS) is a kind of active automobile peace
Full device can monitor tire pressure automatically in real time, allow driver to understand the pressure data of tire at any time, and can be inclined in tire pressure
When low and excessively high and alarm.TPMS improves the safety of car steering, effectively reduces traffic accident, has huge
Big Social benefit and economic benefit.
Wherein, the tire self-locating function of TPMS refers to that automobile tire after installation and replacement, can establish tire automatically
Corresponding relationship between transmitter and tire location.Positioning method difference determines the whole design idea and framework of product, relates to
And surface structure, Electronic Design, chipset composition, mounting process and cost etc..
Summary of the invention
The purpose of the application is, not perfect for the function in existing tire pressure monitoring system, provides a kind of tire pressure prison
Control system, transmitter and tire pressure monitoring method, to reduce system power consumption and improve the accuracy of the self-positioning result of tire.
In order to solve the above technical problems, a technical solution provided by the present application is:
A kind of tire pressure monitoring system is provided, which includes:
Multiple transmitters are separately positioned on each tire of vehicle, wherein are provided in each transmitter for detecting
The tyre pressure sensor of place tire pressure makes position sensing device and control circuit, tire pressure by oneself for the wheel position of foetus where detecting
It sensor and makes position sensing device by oneself and is separately connected control circuit；
Receiver is arranged on vehicle body, wherein low-frequency signal emitter is provided in receiver with low for emitting
Frequency wake-up signal, and low frequency signal receiver is correspondingly provided in any transmitter for receiving low frequency wake-up signal；
Wherein, when any transmitter receipt is to low frequency wake-up signal, then the tire of transmitter transmitting tyre pressure sensor detecting
Press data to receiver, so that the pressure of the tire where receiver monitoring emitter；
When any transmitter does not receive low frequency wake-up signal, then position sensing is made in the control circuit control in transmitter by oneself
The acceleration information of tire where device detects it carries out gain amplification disposal to obtain corresponding acceleration information, and will obtain
The tire pressure data of acceleration information and the tyre pressure sensor detecting taken emit to receiver, so that receiver adds according to what is received
Speed data and the orientation for determining the tire where transmitter, and the pressure of the tire where monitoring emitter.
In order to solve the above technical problems, another technical solution provided by the present application is:
A kind of transmitter is provided, which includes: control circuit, tyre pressure sensor, makes position sensing device and low by oneself
Frequency signal receiver；
Control circuit respectively with tyre pressure sensor, make position sensing device by oneself and low frequency signal receiver is connect；
Low frequency signal receiver, for receiving low frequency wake-up signal；
Tyre pressure sensor, the pressure for tire where detecting；
Position sensing device is made by oneself, for when low frequency signal receiver does not receive low frequency wake-up signal, detecting its place
The acceleration information of tire carries out gain amplification disposal to obtain corresponding acceleration information；
Control circuit, for when low frequency signal receiver receives low frequency wake-up signal, control to emit tyre pressure sensor
The tire pressure data of detecting then control transmitting and accelerate to receiver when low frequency signal receiver does not receive low frequency wake-up signal
Degree evidence and the tire pressure data of tyre pressure sensor detecting are to receiver, so that receiver is true according to the acceleration information received
Determine the orientation of the tire where transmitter, and the pressure of the tire where monitoring emitter.
In order to solve the above technical problems, another technical solution provided by the present application is:
There is provided a kind of tire pressure monitoring method, in this method, transmitter includes: control circuit, tyre pressure sensor, self-positioning sense
Survey device and low frequency signal receiver, control circuit respectively with tyre pressure sensor, make position sensing device and low frequency signal by oneself
Receiver connection；
Wherein, transmitter judges whether to receive low frequency wake-up signal；
When transmitter receipt is to low frequency wake-up signal, then transmitter emits the tire pressure that the tyre pressure sensor in it detects
Data are to receiver, so that the pressure of the tire where receiver monitoring emitter；
When transmitter does not receive low frequency wake-up signal, then position sensing device is made in the control circuit control in transmitter by oneself
The acceleration information of tire where detecting it carries out gain amplification disposal to obtain corresponding acceleration information, and will acquire
Acceleration information and the tire pressure data of tyre pressure sensor detecting are sent to receiver, so that receiver is according to the acceleration received
Data and the orientation for determining the tire where transmitter, and the pressure of the tire where monitoring emitter.
The beneficial effect of the application is: being in contrast to the prior art, the application in receiver by being arranged low frequency
Signal projector with for emit low frequency wake-up signal and be correspondingly provided in any transmitter low frequency signal receiver with
For receiving low frequency wake-up signal, so that whether transmitter can receive low frequency control according to low frequency signal receiving unit in the application
Signal processed is to determine whether carry out the detecting of the acceleration information of tire, so as to the power consumption for the system of saving.
In addition, also by the acceleration information progress gain amplification disposal to tire to obtain corresponding acceleration information,
So that the accuracy for making the data that position sensing device is detected in the application by oneself is higher, to can further improve self-positioning result
Accuracy.
Detailed description of the invention
Fig. 1 is the structural schematic diagram of the application tire pressure monitoring system embodiment；
Fig. 2 is the structural schematic diagram of the transmitter of the application tire pressure monitoring system embodiment；
Fig. 3 is the structural schematic diagram of the receiver of the application tire pressure monitoring system embodiment；
Fig. 4 is the first pass figure of the tire pressure monitoring method of the application tire pressure monitoring system embodiment；
Fig. 5 is the structural schematic diagram for making position sensing device by oneself of the transmitter of the application tire pressure monitoring system embodiment；
Fig. 6 is the second procedure schematic diagram of the tire pressure monitoring method of the application tire pressure monitoring system embodiment；
Fig. 7 is the working condition of the transmitter in Fig. 6 in the tire pressure monitoring method of the application tire pressure monitoring system embodiment
Schematic diagram；
Fig. 8 is the structural schematic diagram of the control circuit of the transmitter of the application tire pressure monitoring system embodiment；
Fig. 9 is the third flow diagram of the tire pressure monitoring method of the application tire pressure monitoring system embodiment；
Figure 10 is the 4th flow diagram of the tire pressure monitoring method of the application tire pressure monitoring system embodiment；
Figure 11 is the structural schematic diagram of the application transmitter embodiment；
Figure 12 is the flow diagram of the application tire pressure monitoring method embodiment.
Specific embodiment
To make those skilled in the art more fully understand the technical solution of the application, with reference to the accompanying drawing and it is embodied
Mode is described in further detail the technical solution of the application.
The application provides a kind of tire pressure monitoring system 100, which can be applied to all kinds of vehicles
In, by taking automobile as an example.
Referring to Fig. 1, wherein, Fig. 1 is the structural schematic diagram of the application tire pressure monitoring system embodiment.
As shown in Figure 1, the tire pressure monitoring system 100 of the application includes: multiple transmitters 10 and receiver 20.
Wherein, multiple transmitters 10 are separately positioned on each tire of vehicle, i.e., four transmitters 10 are separately positioned on
On four tires of vehicle.Receiver 20 is arranged on vehicle body, such as is arranged in the master control display device of vehicle.
In terms of monitoring tire pressure, tyre pressure sensor 11 is provided in transmitter 10, tyre pressure sensor 11 is for detecting
Place tire pressure, transmitter 10 are used to for the pressure data of place tire being sent to receiver 20, and receiver 20, which receives, to be corresponded to
The pressure data of tire enables driver to understand the pressure of corresponding tire in real time to be supplied to driver, still, if one opens
The wheel position of foetus corresponding to the pressure data of uncertain tire that begins or the installation site for changing tire, transmitter 10 and tire
Corresponding relationship between position is just unclear, at this point, being difficult to determination if transmitter 10 sends pressure data to receiver 20 and connecing
Receive the relationship between the pressure data recorded of device 20 and corresponding tire.
For this purpose, referring to Fig. 2, the structural schematic diagram of its transmitter for being schematically shown as the application tire pressure monitoring system embodiment.
It is additionally provided in each transmitter 10 and makes position sensing device 12 and control electricity by oneself for the wheel position of foetus where detecting
Road 13, tyre pressure sensor 11 and makes position sensing device 12 by oneself and is separately connected control circuit 13.
Low frequency signal receiver 14 is additionally provided in each transmitter 10 for receiving low frequency wake-up signal.
In addition, being also provided with data signal transmitter 15 in each transmitter 10, data signal transmitter 15 will be for that will transport
The signal for carrying the pressure data of above-mentioned acceleration information and/or tire is sent to receiver 20.Specifically, data signal transmission
The signal of above-mentioned data can be sent to receiver 20 by RF high-frequency mode by device 15.
Referring to Fig. 3, Fig. 3 is the structural schematic diagram of the receiver of the application tire pressure monitoring system embodiment.
Receiver 20 is provided with low-frequency signal emitter 21 for emitting low frequency wake-up signal.
In addition, receiver 20 is also provided with data signal receiver 22 and processor 23.Data signal receiver 22 is used for
Receive the pressure data and/or acceleration information of its place tire that transmitter 10 is transmitted.Processor 23 is used for according to each
Acceleration information that transmitter 10 is sent and the tire where determining each transmitter 10 are left tire or right wheel tire and according to tire
The pressure for the 10 place tire of pressure data monitoring emitter for pressing sensor 11 to detect.
When in use, receiver 20 can be also attached with the display screen (not shown) of automotive interior, in display screen is shown
Holding includes the near front wheel tire pressure, left rear wheel tire pressure, off-front wheel tire pressure and off hind wheel tire pressure, and display screen is equipped with corresponding the near front wheel
Alarm lamp, left rear wheel alarm lamp, off-front wheel alarm lamp and off hind wheel alarm lamp, receiver 20 are used for the number pressure of each tire
The relative position of display screen is sent to after being matched according to the azimuth information with tire accordingly, allows the operator to intuitive standard
Really see tire pressure data, grasps the tire pressure condition of automobile tire in time.In other embodiments, receiver 20 can be with
It is further wirelessly connected with mobile terminal, such as user mobile phone.
Referring to Fig. 4, Fig. 4 is the first pass figure of the tire pressure monitoring method of the application tire pressure monitoring system embodiment.
In the present embodiment, tire pressure monitoring method the following steps are included:
S102: any transmitter 10 judges whether to receive low frequency wake-up signal.
Optionally, may include S101 before step S102: the control circuit 13 of any transmitter 10 controls tyre pressure sensor
The tire pressure data of its place tire of 11 detectings.
Specifically, can judge that the low frequency in transmitter 10 is believed by the control circuit 13 in any transmitter 10 in the step
Whether number receiver 14 receives low-frequency control signal and control transmitter 10 carries out following steps.
When any transmitter 10 receives low-frequency control signal, S103-S104 is followed the steps below:
S103: the tire pressure data that any transmitting of transmitter 10 tyre pressure sensor 11 is detected to receiver 20.
It is detected specifically, data signal transmitter 15 can be controlled in the step by control circuit 13 and emit tyre pressure sensor 11
Tire pressure data to receiver 20.
In another embodiment, low-frequency control signal can also include the azimuth information of tire, when low in transmitter 10
When in the low-frequency control signal that frequency signal receiver 14 receives including the azimuth information of tire, transmitter 10 emits tire pressure sensing
The azimuth information of pressure data and the tire that device 11 is detected monitors the pressure of corresponding tire to receiver 20.
S104: receiver 20 receives the pressure of the tire where tire pressure data and monitoring emitter 10.
Specifically, tire pressure data can be received in the step by the data signal receiver 22 in receiver 20 and monitor transmitting
The pressure of tire where device 10.
When any transmitter 10 does not receive low-frequency control signal, S105-S107 is followed the steps below:
S105: the control circuit 13 in any transmitter 10, which controls, makes adding for tire where position sensing device 12 detects it by oneself
Velocity information carries out gain amplification disposal to obtain corresponding acceleration information.
Further, when transmitter 10 does not receive low-frequency control signal, position sensing device 12 is made by oneself in control circuit
It under 13 control, is then turned on and is detected after one section of dormancy time, to reduce the power consumption of system.For example, making position sensing by oneself
The dormancy mechanism of device 12 can are as follows: detecting in m seconds is carried out after every n seconds dormancy times of experience, n and m can according to need progress
Setting and change.
S106: the tire pressure data for acceleration information and tyre pressure sensor 11 detecting that transmitter 10 will acquire emit to reception
Device 20.
S107: receiver 20 determines the orientation of the tire where transmitter 10 according to the acceleration information received, and
The pressure of tire where monitoring emitter 10.
In the present embodiment, step S101- step S107 is only the stated order of the present embodiment, is not limited to this reality
Apply the execution step of example, wherein the step of not influence technique scheme realize in the case where can be exchanged.
In the present embodiment, by the way that low-frequency signal emitter 21 is arranged in receiver 20 to be used to emit low frequency wake-up letter
Number and low frequency signal receiver 14 is correspondingly provided in any transmitter 10 with for receiving low frequency wake-up signal so that
Whether transmitter 10 can receive low-frequency control signal according to low frequency signal receiver 14 to determine whether taking turns in the application
The detecting of the acceleration information of tire, it can it allows and makes position sensing device 12 by oneself and keep dormant state when unwanted, thus
The power consumption of system can be saved.
In addition, also by the acceleration information progress gain amplification disposal to tire to obtain corresponding acceleration information,
So that the accuracy for making the data that position sensing device 12 is detected in the application by oneself is higher, made by oneself to can further improve tire
The accuracy of position result.
Please refer to Fig. 5, Fig. 6 and Fig. 7, wherein Fig. 5 is the transmitter of the application tire pressure monitoring system embodiment
Make the structural schematic diagram of position sensing device by oneself.Fig. 6 is the second of the tire pressure monitoring method of the application tire pressure monitoring system embodiment
Flow diagram.Fig. 7 is the transmitter work feelings in Fig. 6 in the tire pressure monitoring method of the application tire pressure monitoring system embodiment
Condition schematic diagram.
Referring to Fig. 5, the position sensing device 12 of making by oneself in transmitter 10 includes: the first sensor 121 and the second sensor
122。
First sensor 121 and the second sensor 122 are connect with control circuit 13 respectively.
Wherein, the centrifugal direction acceleration of tire where the first sensor 121 is used to detect.Second sensor 122 is used for
The tangential direction acceleration of tire where detecting.
Referring to Fig. 6, Fig. 6 is the specific flow chart of the step S105 in Fig. 4, wherein the control in any transmitter 10
Circuit 13 controls the acceleration information for making tire where position sensing device 12 detects it by oneself, carries out gain amplification disposal to obtain phase
The acceleration information answered includes:
S201: the centrifugal direction acceleration for the place tire that the first sensor 121 detects is obtained.
Wherein, the centrifugal direction acceleration for the place tire that the first sensor 121 detects is obtained by control circuit 13.
S202: judge whether the average value for the centrifugal direction acceleration that the first sensor 121 detects is greater than predetermined threshold
And it is in stable state.
Wherein, by control circuit 13 judge centrifugal direction acceleration that the first sensor 121 detects average value whether
Greater than predetermined threshold and it is in stable state.
When vehicle is moved backward or is turned to, Vehicle Speed is smaller, i.e., speed of tire rotations is generally lower, and
When the first sensor 121 detect centrifugal direction acceleration average value be greater than predetermined threshold when, it is known that Vehicle Speed compared with
Greatly, it thus can determine that vehicle is carrying out forward travel, and when the average value of centrifugal direction acceleration is in stable state, i.e. table
Show that vehicle shows greatly at the uniform velocity (traveling acceleration is less than certain value) Lai Jinhang forward travel.
When the average value for the centrifugal direction acceleration that the first sensor 121 detects is not greater than predetermined threshold or is not at steady
When determining state, step S201 is returned to, continues to obtain the centrifugal direction acceleration that the first sensor 121 detects.
Stablize shape when the average value for the centrifugal direction acceleration that the first sensor 121 detects is greater than predetermined threshold and is in
When state, step S203 is executed:
S203: when the first sensor 121, which detects centrifugal direction acceleration, is in minimum value, the control of control circuit 13 the
The continuous sampling in first time period of two sensors 122 obtains the first acceleration information of the tangential direction of tire, and to first
Acceleration information carries out gain process and obtains corresponding first acceleration information.
Wherein, the first acceleration information can be the second sensor 122 and accelerate in the tangential direction that first time period acquires
Maximum value, minimum value or the average value of degree.
S204: when the first sensor 121, which detects centrifugal direction acceleration, is in maximum value, the control of control circuit 13 the
The continuous sampling in second time period of two sensors 122 obtains the second acceleration information of the tangential direction of tire, and to second
Acceleration information carries out gain process and obtains corresponding second acceleration information.
Wherein, the second acceleration information can be the second sensor 122 and accelerate in the tangential direction that second time period acquires
Maximum value, minimum value or the average value of degree.
Second acceleration information is corresponding with the first acceleration information.For example, when the first acceleration information is first
Between in section the maximum value of the acceleration information of the tangential direction of tire acquired in continuous sampling carry out gained after gain process, second
Acceleration information be then the acceleration information of the tangential direction of tire acquired in continuous sampling in second time period maximum value into
Gained after row gain process.
In other embodiments, the first acceleration information and the second acceleration information are also possible to the first acceleration information
It is imported after identical algorithms with the second acceleration information and carries out the data obtained after gain process.
Acceleration information transmitted by any transmitter 10 includes that above-mentioned the first acceleration information and second accelerates degree
According to.
By the above-mentioned means, can judge the traveling of vehicle using the centrifugal direction acceleration that the first sensor 121 is detected
Whether state enables the second sensor 122, so that the second sensor 122 is not needing to decide whether to carry out next step
When in a dormant state, the power consumption of transmitter 10 can be further decreased, and tire provided herein is made by oneself
Position method is implemented without the driving status that vehicle is judged by former vehicle system, the installation and dimension of self aligning system of being more convenient for
Shield, also further reduced use cost.
In addition, the centrifugal direction acceleration that the first sensor 121 detects is in maximum value and minimum value, centrifugal force and gravity
Direction is identical respectively or on the contrary, can have the gravity acceleration g of a unit respectively, so that the maximum of centrifugal direction acceleration
Value and minimum value are easier to detect than median, so opening second when centrifugal direction acceleration is in maximum value or minimum value
Sensor 122, can be improved the accuracy of data detection result, to improve the accuracy of the self-positioning result of tire.Meanwhile it is logical
The continuous sampling in first time period or second time period is crossed, increases number of samples, the tangential of acquired tire can be improved
The accuracy of the acceleration information in direction.
In the present embodiment, defining the first acceleration information is that the centrifugal direction that corresponding first sensor 121 detects adds
Speed opens the second sensor 122 when being in minimum value collected, and defining the second acceleration information is corresponding first sensor
The 121 centrifugal direction acceleration detected open the second sensor 122 when being in maximum value collected, correspondingly, working as data
It can also include the first acceleration when signal projector 15 sends the first acceleration information and the second acceleration information to receiver 20
Data discrimination information corresponding to degree evidence and the second acceleration information, such as the data discrimination information that the first acceleration information is
0, the data discrimination information 1 that the second acceleration information is, the data discrimination information identifies that whichever adds for first for receiver 20
Speed data, whichever are the second acceleration information.
In other embodiments, it can also first obtain the second acceleration information and obtain the first acceleration information again.The application
It is not intended to limit the acquisition sequence of the first acceleration information and the second acceleration information herein.Wherein, " first ", " second " only indicate
When starting to acquire the acceleration information, the centrifugal direction acceleration that the first sensor 121 detects is in minimum value or maximum
Value.
Optionally, receiver 20 is sent according to any transmitter 10 the first acceleration information and the second acceleration information and
Tire where determining transmitter 10 is left tire or right wheel tire；And the first acceleration information and/or second based on the received
The signal strength of acceleration information and the tire where determining transmitter 10 is front tyre or rear tyre.
Receiver 20 is set to the front end or rear end of vehicle, it is generally the case that receiver 20 is the middle control that vehicle is arranged in
In display device, that is, it is located at the front end of vehicle, close to the front tyre of vehicle, and the rear tyre far from vehicle.Then receiver
The transmitted signal strength or weakness of transmitter 10 on 20 front tyres and rear tyre received is also just different, and receiver 20 receives
Front tyre on transmitter 10 transmitted by signal strength be better than signal strength transmitted by the transmitter 10 on rear tyre.
Therefore, receiver 20 can each transmitter 10 is transmitted based on the received the first acceleration information and/or the second acceleration
The signal strengths of data and the tire where determining each transmitter 10 is front tyre or rear tyre.
Optionally, first time period detects the centrifugal direction acceleration of tire no more than tire from the first sensor 121
The consumed time is enclosed up to tyre rotation 1/2 in minimum value；Second time period detects wheel no more than the first sensor 121
The centrifugal direction acceleration of tire encloses the consumed time up to tyre rotation 1/2 for maximum value.
Turn when tire is in minimum value or maximum value from the centrifugal direction acceleration that the first sensor 121 detects tire
In the period of dynamic 1/2 circle, in the component direction of tangential direction, difference is identical for the detecting direction of the second sensor 122 and gravity
Or on the contrary, for example when vehicle is at the uniform velocity advanced, the first acceleration information and the second acceleration information one are positive number, one
It for negative, is relatively used for subsequent, and because numerical value differs larger, can further improve the accuracy of judging result.
Optionally, first time period is the first sensor 121 when to detect the centrifugal direction acceleration of tire be minimum value
The consumed time is enclosed to tyre rotation 1/4；Second time period is the centrifugal direction acceleration that the first sensor 121 detects tire
Degree encloses the consumed time up to tyre rotation 1/4 for maximum value.
By respectively first time period being set as the first sensor 121 to detect the centrifugal direction acceleration of tire being most
Small value encloses the consumed time up to tyre rotation 1/4；Second time period be set as the first sensor 121 detect tire from
Heart directional acceleration encloses the consumed time up to tyre rotation 1/4 for maximum value, can be further reduced the second sensor 122
The time of work, to reduce the power consumption of transmitter 10, and when transmitter 10 detects the centrifugation side of tire from the first sensor 121
1/4 circle of setting in motion rotation, can make the tangential of tire acquired in the second sensor 122 when to acceleration being minimum or minimum value
Directional acceleration tapers to maximum value and minimum value so that the difference of the first acceleration information and the second acceleration information compared with
Greatly, be conducive to subsequent relatively use, improve the accuracy of judging result.
Optionally, it when the first acceleration information that any transmitter 10 is sent is greater than the second acceleration information, then receives
Tire where device 20 determines transmitter 10 is left tire；When the first acceleration information that any transmitter 10 is sent is less than second
When acceleration information, then the tire where receiver 20 determines transmitter 10 is right wheel tire.
Specifically, referring to Figure 7 together.Fig. 7 is the tire pressure monitoring method of the application tire pressure monitoring system embodiment in Fig. 6
In transmitter working condition schematic diagram.
Wherein, A shown in Fig. 7 is located at the highest point (far from ground) of tire for the transmitter 10 on tire, and C is on tire
Transmitter 10 be located at the minimum point (ground proximity) of tire, B is the front end that transmitter 10 on tire is located at tire, and D is
Transmitter 10 on tire is located at the rearmost end of tire, in detail below four points of the transmitter 10 in arcs such as processes on analysis tire
A, the working condition of B, C, D.
It should be noted that transmitter 10, when being mounted on tire, transmitter 10 is pacified respectively relative to setter
On the tire of left and right, for left tire, setter is located at the left of left tire；Relatively, for right wheel tire, peace
Dress person is located at the right of right wheel tire.Since setter is just opposite relative to left and right tire, then transmitter 10 is being installed to left and right
When on tire, the installation direction of transmitter 10 is opposite.Therefore, for detecting tire tangential directional acceleration in transmitter 10
The second sensor 122, the detecting direction on the tire of left and right is exactly the opposite；And it is used to detect tire centrifugal direction acceleration
The first sensor 121, due to its detect direction always departing from be directed toward tire fetal rhythm direction, in left and right tire
On detecting direction it is consistent.
When illustrating that vehicle forward direction drives at a constant speed by taking revolver as an example below, the transmitter 10 on revolver is passing through A, B, C, D
The first sensor 121 and the respective working condition of the second sensor 122 when point, in transmitter 10.
When transmitter 10 is by A point, since centrifugal force direction and gravity direction are located on the centrifugal direction of revolver,
And centrifugal force direction and gravity direction is contrary, is accordingly used in the first sensor of the centrifugal direction acceleration of detecting revolver
The 121 centrifugal direction acceleration that can detect revolver are minimum value, i.e. a-g, wherein a is the acceleration corresponding to centrifugal force, and
G is the acceleration corresponding to gravity；And at this point, the second sensor 122 of the tangential direction acceleration for detecting revolver can be detectd
The tangential direction acceleration of the revolver measured is 0.
When transmitter 10 is by B point, since gravity direction is and itself and the second sensing in the tangential direction of revolver
The detecting direction of device 122 is identical, therefore the tangential direction acceleration of revolver that the second sensor 122 detects is maximum value g.
When transmitter 10 is by C point, since centrifugal force direction and gravity direction are all located on the centrifugal direction of revolver, and
Centrifugal force direction is identical with the direction of gravity direction, is accordingly used in the first sensor of the centrifugal direction acceleration of detecting revolver
The 121 centrifugal direction acceleration that can detect revolver are maximum value, i.e. a+g；And revolver that the second sensor 122 detects is cut
It is 0 to the size of directional acceleration.
When transmitter 10 is by D, since gravity direction is and itself and the second sensor in the tangential direction of revolver
122 detecting is contrary, therefore the tangential direction acceleration of revolver that the second sensor 122 detects is minimum value-g.
Therefore, when transmitter 10 moves to A point, the centrifugal direction acceleration that the first sensor 121 detects revolver is
Minimum value；When transmitter 10 moves to C point, the centrifugal direction acceleration that the first sensor 121 detects revolver is maximum value.
In the present embodiment, when transmitter 10 moves to A point, i.e. centrifugation side that the first sensor 121 detects revolver
To acceleration be minimum value when, the second sensor 122 work, in first time period continuous sampling obtain revolver tangential direction
The first acceleration information, and to the first acceleration information carry out gain process and obtain corresponding first acceleration information,
In, first time period no more than revolver from A point by B point move to the time consumed by C point (i.e. first time period no more than a left side
Wheel is in minimum value from the centrifugal direction acceleration that the first sensor 121 detects revolver and is consumed up to 1/2 circle of revolver rotation
Time).As moving in first time period consumed by C point from A point by B point in revolver, the second sensor 122 is detectd
The angle surveyed between direction and gravity acceleration g vertically downward is consistently less than 90 degree, and therefore, the second sensor 122 detects
Tangential direction acceleration be in positive value always.In particular, when left wheel motion to B point, the detecting direction of the second sensor 122
It is overlapped with the direction of acceleration of gravity, therefore, the second sensor 122 detects the tangential direction acceleration of revolver as maximum at this time
Value g.That is, in first time period, tangential direction acceleration that the second sensor 122 detects from 0 incrementally increase to
Then g is gradually reduced again to 0.And the first acceleration information can be the second sensor 122 acquired in first time period it is tangential
Maximum value, minimum value or the average value of directional acceleration.
And when transmitter 10 moves to C, i.e. the first sensor 121 detects the centrifugal direction acceleration of revolver as maximum
When value, the work of the second sensor 122, the second acceleration of the tangential direction for the revolver that continuous sampling obtains in second time period
Information, and gain process is carried out to second acceleration information and obtains corresponding second acceleration information, wherein when second
Between section no more than revolver move to the time consumed by A point by D point from C point (i.e. second time period be no more than revolver from first
The centrifugal direction acceleration that sensor 121 detects revolver is in maximum value and encloses the consumed time up to revolver rotation 1/2).
As being moved in second time period consumed by A point from C point by D point in revolver, the detecting direction of the second sensor 122 with
The angle between gravity acceleration g vertically downward is consistently greater than 90 degree, therefore, the tangential side that the second sensor 122 detects
It is in negative value always to acceleration.In particular, the detecting direction of the second sensor 122 adds with gravity when left wheel motion to D point
Speed it is contrary, therefore, at this time the second sensor 122 detect revolver tangential direction acceleration be minimum value-g.?
That is in first time period, tangential direction acceleration that the second sensor 122 detects is gradually reduced from 0 to-g, then
It is incrementally increased again to 0.And the second acceleration information can be the second sensor 122 and add in the tangential direction that second time period acquires
Maximum value, minimum value or the average value of speed.
Correspondingly, the transmitter on the detecting direction and revolver of the first sensor 121 in the transmitter 10 in right wheel
The detecting direction of the first sensor 121 in 10 is consistent, therefore, the first sensor 121 in right wheel be also when by A point,
The centrifugal direction acceleration detected is minimum value, i.e. a-g；And when by C point, the centrifugal direction acceleration detected is most
Small value, i.e. a+g.
And the detecting direction of the second sensor 122 is contrary with the detecting of the second sensor 122 on revolver in right wheel,
Therefore, the second sensor 122 is minimum value-g in the tangential direction acceleration by detecting when B point, i.e., passes through in right wheel from A
In the first time period of B to C, the tangential direction acceleration that the second sensor 122 detects is to gradually reduce from 0 to-g, then
0 is increased to again.And the second sensor 122 is maximum value+g in the tangential direction acceleration by detecting when D point, i.e., in right wheel
From C by D to A second time period in, the tangential direction acceleration that the second sensor 122 detects be from 0 incrementally increase to+
Then g is gradually reduced again to 0.
Therefore, the first acceleration information and the second acceleration information that receiver 20 is sent according to each transmitter 10
It is left tire or right wheel tire with the tire where each transmitter 10 of determination.
In addition, it will be appreciated by persons skilled in the art that first time period also can be set as being not more than tire from first
The centrifugal direction acceleration that sensor 121 detects tire is in minimum value and encloses the consumed time up to tyre rotation 1/4, i.e.,
Tire moves to the time consumed by B point from A point, that is to say, that for revolver, what the second sensor 122 sensed is cut
It incrementally increases to directional acceleration from 0 to g；For right wheel, tangential direction that the second sensor 122 senses
Acceleration is gradually reduced from 0 to-g.Relatively, second time period also can be set as being not more than tire from the first sensor 121
The centrifugal direction acceleration for detecting tire is in maximum value and encloses the consumed time up to tyre rotation 1/4, i.e. tire is from C point
Move to the time consumed by D point, that is to say, that for revolver, the tangential direction that the second sensor 122 detects accelerates
Degree is gradually reduced from 0 to-g；For right wheel, tangential direction acceleration that the second sensor 122 detects is from 0
It incrementally increases to+g.
Therefore, in the present embodiment, when the first acceleration information that transmitter 10 is sent is greater than the second acceleration information,
Tire where then receiver 20 can determine transmitter 10 is left tire；When the first acceleration information is less than the second acceleration information
When, receiver 20 can determine that fixed wheel tire is right wheel tire really at transmitter 10 place.
In the present embodiment, determine that tire is left by comparing the size of the first acceleration information and the second acceleration information
Tire or right wheel tire, compared with the existing technology in realize the self-positioning mode of tire, calculation is easier, and calculated result is more
It is accurate to add, and the difficulty due to reducing data processing, can effectively reduce the power consumption of receiver 20.
Please refer to Fig. 8, Fig. 9 and Figure 10.Wherein, Fig. 8 is the transmitter of the application tire pressure monitoring system embodiment
Control circuit structural schematic diagram.Fig. 9 is the third process of the tire pressure monitoring method of the application tire pressure monitoring system embodiment
Schematic diagram.Figure 10 is the 4th flow diagram of the tire pressure monitoring method of the application tire pressure monitoring system embodiment.
Referring to Fig. 8, control circuit 13 includes data selector 131, differential operational amplifier 132 and microcontroller
133。
First sensor 121 and the second sensor 122 are connected to differential operational amplifier by data selector 131
132, and microcontroller 133 is connected to by differential operational amplifier 132.
Please refer to Fig. 9.Fig. 9 show the part specific flow chart of step S203 in Fig. 6.
Wherein, when the first sensor 121, which detects centrifugal direction acceleration, is in minimum value.
Control circuit 13 controls the second sensor 122 tangential direction of continuous sampling acquisition tire in first time period
First acceleration information, and the first acceleration information is carried out gain process and obtain corresponding first acceleration information to include such as
Lower step:
The first of the tangential direction of S301: the second sensor 122 tire that continuous sampling obtains in first time period adds
Velocity information is input to differential operational amplifier 132 by data selector 131.
S302: the first acceleration after corresponding gain is calculated in the work of differential operational amplifier 132 under the first gain
Information.
Optionally, the first gain is self-adapting changeable gain.
Specifically, maximum gain can be preset, the data of sampling are input to differential operational amplifier 132 and make calculus of differences
Corresponding acceleration information is calculated in the work of amplifier 132 under maximum gain, judges in resulting acceleration information most
Whether big value overflows:
If not overflowing, using the maxgain value as the value of the first gain, and the acceleration information is exported.
If overflowing, so that maximum gain is successively decreased and obtain current gain, until acceleration letter acquired under current gain
Maximum value in breath is not overflowed, then using current gain value as the value of the first gain, and exports the acceleration information.
S303: microcontroller 133 is received from the first acceleration information after the gain that differential operational amplifier 132 transmits, and
The tangential direction acceleration that actual tire is obtained according to the first acceleration information after the value and gain of the first gain, using as
First acceleration information.
Please refer to Figure 10.Figure 10 show the part specific flow chart of step S204 in Fig. 6.
Wherein, when the first sensor 121, which detects centrifugal direction acceleration, is in maximum value.
Control circuit 13 controls the second sensor 122 tangential direction of continuous sampling acquisition tire in second time period
Second acceleration information, and the second acceleration information is carried out gain process and obtain corresponding second acceleration information to include such as
Lower step:
The second of the tangential direction of S401: the second sensor 122 tire that continuous sampling obtains in second time period adds
Velocity information is input to differential operational amplifier 132 by data selector 131.
S402: the second acceleration after corresponding gain is calculated in the work of differential operational amplifier 132 under the second gain
Information.
S403: microcontroller 133 is received from the second acceleration information after the gain that differential operational amplifier 132 transmits, and
The tangential direction acceleration that actual tire is obtained according to the second acceleration information after the value and gain of the second gain, using as
Second acceleration information.
Optionally, the value of the first gain is equal to the value of the second gain.
When the first sensor 121, which detects centrifugal direction acceleration, is in stable state, the detecting of the second sensor 122
Tangential direction acceleration is also steady change, so can reduce using the value of the first gain as the value of the second gain and repeat to determine
The value process of adopted second gain, and the second acceleration information is amplified to maximum multiple, while improving data accuracy, into
One step reduces power consumption.
By the above-mentioned means, the acceleration information of tire tangential direction acquired in the second sensor 122 is made to carry out increase increasing
Susceptibility when data detection can be improved in benefit, to further increase the accuracy of collecting method.
Particularly, when wheel carries out uniform rotation, the tangential direction acceleration of the second sensor 122 detecting will receive one
The influence of the acceleration of gravity of a unit, the sampling difficulty of acceleration information increases at this time, and to acquired acceleration information
Required precision it is high, by the way that current gain is amplified to maximum multiple and increases number of samples, data sampling error can be reduced
Risk.
Figure 11 is please referred to, the structural schematic diagram of the application transmitter embodiment is schematically shown as.
Transmitter 10a in the present embodiment, is arranged on each tire of vehicle.
Transmitter 10a includes control circuit 13a, tyre pressure sensor 11a, makes position sensing device 12a and low frequency signal by oneself
Receiver 14a.
Control circuit 13a respectively with tyre pressure sensor 11a, make position sensing device 12a and low frequency signal receiver 14a by oneself
Connection.
Low frequency signal receiver 14a is for receiving low frequency wake-up signal, and tyre pressure sensor 11a is for tire where detecting
Pressure, make position sensing device 12a by oneself for when low frequency signal receiver 14a does not receive low frequency wake-up signal, detect it
The acceleration information of place tire carries out gain amplification disposal to obtain corresponding acceleration information.
Control circuit 13a is used for when low frequency signal receiver 14a receives low frequency wake-up signal, control transmitting tire pressure sense
The tire pressure data of device 11a detecting are surveyed to receiver 20.When low frequency signal receiver 14a does not receive low frequency wake-up signal, then
The tire pressure data of launching acceleration data and tyre pressure sensor 11a detecting are controlled to receiver 20, so that receiver 20 is according to connecing
The acceleration information that receives and the orientation for determining the tire where transmitter 10a, and the pressure of the tire where monitoring emitter 10a
Power.
The present embodiment provides a kind of transmitter 10a to refer to the application about the more structure and functions of transmitter 10a
The content of tire pressure monitoring system embodiment, details are not described herein.
Figure 12 is please referred to, the flow diagram of the application tire pressure monitoring method embodiment is schematically shown as.
The tire pressure monitoring method of the present embodiment is executing subject with transmitter 10, and transmitter 10 includes: control circuit 13, tire
Pressure sensor 11 makes position sensing device 12 and low frequency signal receiver 14 by oneself, control circuit 13 respectively with tyre pressure sensor 11,
It makes position sensing device 12 by oneself and low frequency signal receiver 14 connects.
The tire pressure monitoring method of the present embodiment includes the following steps:
S111: transmitter 10 judges whether to receive low frequency wake-up signal.
Optionally, may include S110 before step S111: the control circuit 13 of transmitter 10 controls tyre pressure sensor 11 and detects
The tire pressure data of tire where surveying it.
When transmitter 10 receives low-frequency control signal, step S112 is carried out:
S112: transmitter 10 emits the tire pressure data that detect of tyre pressure sensor 11 in it to receiver 20, so as to connect
Receive the pressure of the tire where 20 monitoring emitter of device 10.
When transmitter 10 does not receive low frequency wake-up signal, step S113-S114 is carried out:
S113: the control circuit 13 in transmitter 10 controls the acceleration for making tire where position sensing device 12 detects it by oneself
Information, carry out gain amplification disposal to obtain corresponding acceleration information,
S114: the tire pressure data for acceleration information and tyre pressure sensor 11 detecting that transmitter 10 will acquire are sent to reception
Device 20 so that receiver 20 determines the orientation of the tire where transmitter 10 according to the acceleration information received, and monitors
The pressure of tire where transmitter 10.
The tire pressure monitoring method of the present embodiment is executing subject with transmitter 10, the step more about tire pressure monitoring method
And content, refer to the first pass figure of the tire pressure monitoring method of the application tire pressure monitoring system embodiment to third flow chart,
Details are not described herein.
The above is only embodiments of the present invention, are not intended to limit the scope of the invention, all to utilize the present invention
Equivalent structure or equivalent flow shift made by specification and accompanying drawing content is applied directly or indirectly in other relevant technologies
Field similarly includes in scope of patent protection of the invention.
Claims (16)
1. a kind of tire pressure monitoring system characterized by comprising
Multiple transmitters are separately positioned on each tire of vehicle, wherein are provided in each transmitter for detecting
The tyre pressure sensor of place tire pressure makes position sensing device and control circuit by oneself for the wheel position of foetus where detecting, described
Tyre pressure sensor and the position sensing device of making by oneself are separately connected the control circuit；
Receiver is arranged on the vehicle body, wherein low-frequency signal emitter is provided in the receiver for sending out
Low frequency wake-up signal is penetrated, and is correspondingly provided with low frequency signal receiver in any transmitter for receiving the low frequency
Wake-up signal；
Wherein, when any transmitter receipt is to the low frequency wake-up signal, then the transmitter emits the tire pressure sense
The tire pressure data of device detecting are surveyed to the receiver, so that the receiver monitors the pressure of the tire where the transmitter；
When any transmitter does not receive the low frequency wake-up signal, then the control circuit control in the transmitter
The acceleration information for making tire where position sensing device detects it described in system by oneself carries out gain amplification disposal to obtain corresponding add
Speed data, and the acceleration information that will acquire and the tire pressure data of tyre pressure sensor detecting emit to the reception
Device, so that the receiver determines the orientation of the tire where the transmitter according to the acceleration information received,
And monitor the pressure of the tire where the transmitter.
2. tire pressure monitoring system according to claim 1, which is characterized in that the position sensing device of making by oneself includes:
First sensor connects the control circuit to detect the centrifugal direction acceleration of place tire；
Second sensor connects the control circuit to detect the tangential direction acceleration of place tire；
Wherein, the average value of the centrifugal direction acceleration of tire is greater than predetermined threshold where detecting in first sensor
After being worth and being in stable state,
When first sensor, which detects the centrifugal direction acceleration, is in minimum value, described in the control circuit control
The continuous sampling in first time period of second sensor obtains the first acceleration information of the tangential direction of the tire, and to institute
The first acceleration information is stated to carry out gain process and obtain corresponding first acceleration information；
When first sensor, which detects the centrifugal direction acceleration, is in maximum value, described in the control circuit control
The continuous sampling in second time period of second sensor obtains the second acceleration information of the tangential direction of the tire, and to institute
The second acceleration information is stated to carry out gain process and obtain corresponding second acceleration information；
Wherein, acceleration information transmitted by any transmitter includes that first acceleration information and described second accelerate
Degree evidence.
3. tire pressure monitoring system according to claim 2, which is characterized in that the receiver is according to any transmitter
First acceleration information and second acceleration information that send and the tire where determining the transmitter is revolver
Tire or right wheel tire；And the signal strength of first acceleration information and/or second acceleration information based on the received
And the tire where determining the transmitter is front tyre or rear tyre.
4. tire pressure monitoring system according to claim 3, which is characterized in that when any transmitter send described the
When one acceleration information is greater than second acceleration information, then the tire where the receiver determines the transmitter is left
Tire；It is when first acceleration information that any transmitter is sent is less than second acceleration information, then described
Tire where receiver determines the transmitter is right wheel tire.
5. tire pressure monitoring system according to claim 2, which is characterized in that the first time period is not more than the tire
The centrifugal direction acceleration for detecting the tire from first sensor is in minimum value up to the tyre rotation
1/2 encloses the consumed time；The second time period detects the centrifugal direction of the tire no more than first sensor
Acceleration encloses the consumed time up to the tyre rotation 1/2 for maximum value.
6. tire pressure monitoring system according to claim 2, which is characterized in that the first time period is the tire from institute
It states the first sensor and detects the centrifugal direction acceleration of the tire and be in minimum value and enclosed up to the tyre rotation 1/4
The consumed time；The second time period is that the centrifugal direction acceleration that first sensor detects the tire is most
Big value encloses the consumed time up to the tyre rotation 1/4.
7. tire pressure monitoring system according to claim 2, which is characterized in that the control circuit include: data selector,
Differential operational amplifier and microcontroller, wherein first sensor and second sensor are selected by the data
It selects device and is connected to the differential operational amplifier, and be connected to the microcontroller by the differential operational amplifier；
Wherein, the of the tangential direction of second sensor tire that continuous sampling obtains in the first time period
One acceleration information is input to the differential operational amplifier, the differential operational amplifier work by the data selector
The first acceleration information after corresponding gain is calculated in work under the first gain, and the microcontroller is received from the difference
First acceleration information after the gain that operational amplifier transmits, and according to after the value and the gain of first gain
One acceleration information and the tangential direction acceleration for obtaining the actual tire, using as first acceleration information；
The second of the tangential direction of second sensor tire that continuous sampling obtains in the second time period adds
Velocity information is input to the differential operational amplifier by the data selector, and the differential operational amplifier work exists
The second acceleration information after corresponding gain is calculated under second gain, and the microcontroller is received from the calculus of differences
Second acceleration information after the gain that amplifier transmits, and add according to after the value and the gain of second gain second
Velocity information and the tangential direction acceleration for obtaining the actual tire, using as second acceleration information.
8. a kind of transmitter is arranged on each tire of vehicle characterized by comprising
Control circuit, tyre pressure sensor make position sensing device and low frequency signal receiver by oneself；
The control circuit respectively with the tyre pressure sensor, described make position sensing device and the low frequency signal receiver by oneself
Connection；
The low frequency signal receiver, for receiving low frequency wake-up signal；
The tyre pressure sensor, the pressure for tire where detecting；
It is described to make position sensing device by oneself, for detecing when the low frequency signal receiver does not receive the low frequency wake-up signal
The acceleration information of tire where surveying it carries out gain amplification disposal to obtain corresponding acceleration information；
The control circuit, for when the low frequency signal receiver receives low frequency wake-up signal, control to emit the tire
Press the tire pressure data of sensor detecting to receiver, when the low frequency signal receiver does not receive the low frequency wake-up signal
When, then the tire pressure data for emitting the acceleration information and tyre pressure sensor detecting are controlled to receiver, so that receiver
The orientation of the tire where the transmitter is determined according to the acceleration information received, and monitors the transmitter institute
Tire pressure.
9. transmitter according to claim 8, which is characterized in that the position sensing device of making by oneself includes:
First sensor and the second sensor；
First sensor and second sensor are connect with the control circuit respectively；
First sensor, the centrifugal direction acceleration for tire where detecting；
Second sensor, the tangential direction acceleration for tire where detecting；
Wherein, the average value of the centrifugal direction acceleration of tire is greater than predetermined threshold where detecting in first sensor
After being worth and being in stable state,
When first sensor, which detects the centrifugal direction acceleration, is in minimum value, described in the control circuit control
The continuous sampling in first time period of second sensor obtains the first acceleration information of the tangential direction of the tire, and to institute
The first acceleration information is stated to carry out gain process and obtain corresponding first acceleration information；
When first sensor, which detects the centrifugal direction acceleration, is in maximum value, described in the control circuit control
The continuous sampling in second time period of second sensor obtains the second acceleration information of the tangential direction of the tire, and to institute
The second acceleration information is stated to carry out gain process and obtain corresponding second acceleration information；
Wherein, the acceleration information includes first acceleration information and second acceleration information.
10. transmitter according to claim 9, which is characterized in that the control circuit includes:
Data selector, differential operational amplifier and microcontroller；
First sensor and second sensor are connected to the calculus of differences by the data selector and amplify
Device, and the microcontroller is connected to by the differential operational amplifier；
Wherein, the first of the tangential direction of second sensor tire that continuous sampling obtains in first time period adds
Velocity information is input to the differential operational amplifier by the data selector, and the differential operational amplifier work exists
The first acceleration information after corresponding gain is calculated under first gain, and the microcontroller is received from the calculus of differences
First acceleration information after the gain that amplifier transmits, and add according to after the value and the gain of first gain first
Velocity information and the tangential direction acceleration for obtaining the actual tire, using as first acceleration information；
Second acceleration of the tangential direction of second sensor tire that continuous sampling obtains in second time period
Information is input to the differential operational amplifier by the data selector, and the differential operational amplifier work is second
The second acceleration information after corresponding gain is calculated under gain, and the microcontroller receives and amplifies from the calculus of differences
Second acceleration information after the gain that device transmits, and according to the second acceleration after the value and the gain of second gain
Information and the tangential direction acceleration for obtaining the actual tire, using as second acceleration information.
11. transmitter according to claim 9, which is characterized in that the first time period is the tire from described the
The centrifugal direction acceleration that one sensor detects the tire is in minimum value and is disappeared up to the tyre rotation 1/4 circle
The time of consumption；The second time period is that the centrifugal direction acceleration that first sensor detects the tire is maximum value
The consumed time is enclosed up to the tyre rotation 1/4.
12. a kind of tire pressure monitoring method, which is characterized in that transmitter includes: control circuit, tyre pressure sensor, makes position sensing by oneself
Device and low frequency signal receiver, the control circuit respectively with the tyre pressure sensor, it is described make by oneself position sensing device with
And the low frequency signal receiver connection；
Wherein, transmitter judges whether to receive low frequency wake-up signal；
When the transmitter receipt is to the low frequency wake-up signal, then the transmitter emits the detecting of the tyre pressure sensor in it
The tire pressure data arrived are to receiver, so that receiver monitors the pressure of the tire where the transmitter；
When the transmitter does not receive the low frequency wake-up signal, then the control circuit control in the transmitter is self-positioning
The acceleration information of tire where sensing device detects it carries out gain amplification disposal to obtain corresponding acceleration information, and
The acceleration information that will acquire and the tire pressure data of tyre pressure sensor detecting are sent to receiver, so that receiver root
The orientation of the tire where the transmitter is determined according to the acceleration information received, and monitors the transmitter place
Tire pressure.
13. tire pressure monitoring method according to claim 12, which is characterized in that the position sensing device of making by oneself includes:
One sensor and the second sensor, first sensor and second sensor are connect with the control circuit respectively, institute
Centrifugal direction acceleration of first sensor for tire where detecting is stated, tire where second sensor is used to detect
Tangential direction acceleration；
Wherein, the acceleration information of tire where position sensing device detects it is made in the control circuit control in the transmitter by oneself,
Gain amplification disposal is carried out to obtain corresponding acceleration information, and the acceleration information that will acquire and tire pressure sensing
The step of tire pressure data of device detecting are sent to the receiver further comprises:
The average value of the centrifugal direction acceleration of tire is greater than predetermined where detecting first sensor and detecting
Threshold value and after the stable state,
When first sensor, which detects the centrifugal direction acceleration, is in minimum value, described in the control circuit control
The continuous sampling in first time period of second sensor obtains the first acceleration information of the tangential direction of the tire, and to institute
The first acceleration information is stated to carry out gain process and obtain corresponding first acceleration information；
When first sensor, which detects the centrifugal direction acceleration, is in maximum value, described in the control circuit control
The continuous sampling in second time period of second sensor obtains the second acceleration information of the tangential direction of the tire, and to institute
The second acceleration information is stated to carry out gain process and obtain corresponding second acceleration information；
Wherein, acceleration information transmitted by any transmitter includes that first acceleration information and described second accelerate
Degree evidence.
14. tire pressure monitoring method according to claim 13, which is characterized in that the first time period is not more than the wheel
Tire is in minimum value up to the tyre revolution from the centrifugal direction acceleration that first sensor detects the tire
Dynamic 1/2 encloses the consumed time；The second time period detects the centrifugation side of the tire no more than first sensor
The consumed time is enclosed up to the tyre rotation 1/2 to acceleration for maximum value.
15. tire pressure monitoring method according to claim 13, which is characterized in that the first time period be the tire from
The centrifugal direction acceleration that first sensor detects the tire is in minimum value up to the tyre rotation 1/4
Time consumed by enclosing；The second time period is that first sensor detects the centrifugal direction acceleration of the tire and is
Maximum value encloses the consumed time up to the tyre rotation 1/4.
16. tire pressure monitoring method according to claim 13, which is characterized in that the control circuit includes: data selection
Device, differential operational amplifier and microcontroller, wherein first sensor and second sensor pass through the data
Selector and be connected to the differential operational amplifier, and be connected to the microcontroller by the differential operational amplifier
Device；
Wherein, when first sensor, which detects the centrifugal direction acceleration, is in minimum value, the control circuit control
The first acceleration information that the second sensor continuous sampling in first time period obtains the tangential direction of the tire is made,
And the step of gain process is carried out to first acceleration information and obtains corresponding first acceleration information, further wrap
It includes:
When first sensor, which detects the centrifugal direction acceleration, is in minimum value, described in the control circuit control
Second sensor is opened, so that the second sensor continuous sampling in first time period obtains the tangential direction of the tire
The first acceleration information；
First acceleration information of sampling is input to the differential operational amplifier by data selector, and makes institute
It states and the first acceleration information after corresponding gain is calculated under differential operational amplifier the first gain of work；
First acceleration information after the gain that the microcontroller reception is transmitted from the differential operational amplifier, and according to
First acceleration information after the value and the gain of first gain and obtain the actual tire tangential direction accelerate
Degree, using as first acceleration information；
And when first sensor detects the centrifugal direction acceleration and is in maximum value, the control circuit controls institute
The second acceleration information that the continuous sampling in second time period of the second sensor obtains the tangential direction of the tire is stated, and right
The step of second acceleration information carries out gain process and obtains corresponding second acceleration information further comprises:
When first sensor, which detects the centrifugal direction acceleration, is in maximum value, described in the control circuit control
Second sensor is opened, so that the second sensor continuous sampling in second time period obtains the tangential direction of the tire
The second acceleration information；
Second acceleration information of sampling is input to the differential operational amplifier by data selector, and makes institute
It states and the second acceleration information after corresponding gain is calculated under differential operational amplifier the second gain of work；
Second acceleration information after the gain that the microcontroller reception is transmitted from the differential operational amplifier, and according to
Second acceleration information after the value and the gain of second gain and obtain the actual tire tangential direction accelerate
Degree, using as second acceleration information.
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| CN113071270A (en) * | 2021-03-22 | 2021-07-06 | 深圳市道通科技股份有限公司 | Detection system, method, device, electronic equipment and computer readable storage medium |
| CN113799552A (en) * | 2020-06-16 | 2021-12-17 | 武汉杰开科技有限公司 | Left and right wheel positioning method, tire pressure monitoring chip and system and related device |
| CN114619808A (en) * | 2022-01-20 | 2022-06-14 | 武汉杰开科技有限公司 | Front and rear wheel positioning method, tire pressure monitoring device and system |
| CN115431680A (en) * | 2021-06-01 | 2022-12-06 | 英飞凌科技股份有限公司 | Selective activation of TPMS sensor modules for RF communication |
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