CN110311601A - Clamping device powers off targeted release circuit device and bracket and vehicle-mounted bracket with the circuit device - Google Patents
Clamping device powers off targeted release circuit device and bracket and vehicle-mounted bracket with the circuit device Download PDFInfo
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- CN110311601A CN110311601A CN201910696836.2A CN201910696836A CN110311601A CN 110311601 A CN110311601 A CN 110311601A CN 201910696836 A CN201910696836 A CN 201910696836A CN 110311601 A CN110311601 A CN 110311601A
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- circuit
- motor
- pin
- control chip
- motor drive
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- H—ELECTRICITY
- H02—GENERATION; CONVERSION OR DISTRIBUTION OF ELECTRIC POWER
- H02H—EMERGENCY PROTECTIVE CIRCUIT ARRANGEMENTS
- H02H7/00—Emergency protective circuit arrangements specially adapted for specific types of electric machines or apparatus or for sectionalised protection of cable or line systems, and effecting automatic switching in the event of an undesired change from normal working conditions
- H02H7/08—Emergency protective circuit arrangements specially adapted for specific types of electric machines or apparatus or for sectionalised protection of cable or line systems, and effecting automatic switching in the event of an undesired change from normal working conditions for dynamo-electric motors
- H02H7/0811—Emergency protective circuit arrangements specially adapted for specific types of electric machines or apparatus or for sectionalised protection of cable or line systems, and effecting automatic switching in the event of an undesired change from normal working conditions for dynamo-electric motors for dc motors
-
- H—ELECTRICITY
- H02—GENERATION; CONVERSION OR DISTRIBUTION OF ELECTRIC POWER
- H02H—EMERGENCY PROTECTIVE CIRCUIT ARRANGEMENTS
- H02H7/00—Emergency protective circuit arrangements specially adapted for specific types of electric machines or apparatus or for sectionalised protection of cable or line systems, and effecting automatic switching in the event of an undesired change from normal working conditions
- H02H7/08—Emergency protective circuit arrangements specially adapted for specific types of electric machines or apparatus or for sectionalised protection of cable or line systems, and effecting automatic switching in the event of an undesired change from normal working conditions for dynamo-electric motors
- H02H7/085—Emergency protective circuit arrangements specially adapted for specific types of electric machines or apparatus or for sectionalised protection of cable or line systems, and effecting automatic switching in the event of an undesired change from normal working conditions for dynamo-electric motors against excessive load
- H02H7/0853—Emergency protective circuit arrangements specially adapted for specific types of electric machines or apparatus or for sectionalised protection of cable or line systems, and effecting automatic switching in the event of an undesired change from normal working conditions for dynamo-electric motors against excessive load specially adapted for motors rotating in both directions
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- H—ELECTRICITY
- H02—GENERATION; CONVERSION OR DISTRIBUTION OF ELECTRIC POWER
- H02J—CIRCUIT ARRANGEMENTS OR SYSTEMS FOR SUPPLYING OR DISTRIBUTING ELECTRIC POWER; SYSTEMS FOR STORING ELECTRIC ENERGY
- H02J9/00—Circuit arrangements for emergency or stand-by power supply, e.g. for emergency lighting
- H02J9/04—Circuit arrangements for emergency or stand-by power supply, e.g. for emergency lighting in which the distribution system is disconnected from the normal source and connected to a standby source
- H02J9/06—Circuit arrangements for emergency or stand-by power supply, e.g. for emergency lighting in which the distribution system is disconnected from the normal source and connected to a standby source with automatic change-over, e.g. UPS systems
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- H—ELECTRICITY
- H02—GENERATION; CONVERSION OR DISTRIBUTION OF ELECTRIC POWER
- H02P—CONTROL OR REGULATION OF ELECTRIC MOTORS, ELECTRIC GENERATORS OR DYNAMO-ELECTRIC CONVERTERS; CONTROLLING TRANSFORMERS, REACTORS OR CHOKE COILS
- H02P7/00—Arrangements for regulating or controlling the speed or torque of electric DC motors
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- H—ELECTRICITY
- H02—GENERATION; CONVERSION OR DISTRIBUTION OF ELECTRIC POWER
- H02P—CONTROL OR REGULATION OF ELECTRIC MOTORS, ELECTRIC GENERATORS OR DYNAMO-ELECTRIC CONVERTERS; CONTROLLING TRANSFORMERS, REACTORS OR CHOKE COILS
- H02P7/00—Arrangements for regulating or controlling the speed or torque of electric DC motors
- H02P7/03—Arrangements for regulating or controlling the speed or torque of electric DC motors for controlling the direction of rotation of DC motors
-
- H—ELECTRICITY
- H02—GENERATION; CONVERSION OR DISTRIBUTION OF ELECTRIC POWER
- H02J—CIRCUIT ARRANGEMENTS OR SYSTEMS FOR SUPPLYING OR DISTRIBUTING ELECTRIC POWER; SYSTEMS FOR STORING ELECTRIC ENERGY
- H02J7/00—Circuit arrangements for charging or depolarising batteries or for supplying loads from batteries
- H02J7/34—Parallel operation in networks using both storage and other dc sources, e.g. providing buffering
- H02J7/345—Parallel operation in networks using both storage and other dc sources, e.g. providing buffering using capacitors as storage or buffering devices
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- Engineering & Computer Science (AREA)
- Power Engineering (AREA)
- Business, Economics & Management (AREA)
- Emergency Management (AREA)
- Control Of Direct Current Motors (AREA)
Abstract
The invention discloses a kind of clamping devices to power off targeted release circuit device, circuit device includes way circuit, way circuit includes the circuit for controlling motor for controlling dc motor, it and include motor drive ic and energy storage type electrolytic capacitor in circuit for controlling motor for transmitting the MCU control circuit that electric signal instructs to circuit for controlling motor；MCU control circuit includes control chip, when way circuit power-off, energy storage type electrolytic capacitor can discharge so that motor drive ic and control chip continue to operate, the pin and motor drive ic that control chip is used to control motor drive ic respectively correspond electric connection, chip controls chip rotates backward its control dc motor within t seconds time to transmit electric signal to motor drive ic, and present invention offer also provides a kind of bracket.Present invention offer also provides a kind of vehicle-mounted bracket.
Description
[technical field]
The present invention relates to technical field of electric equipment, specifically a kind of clamping device power-off targeted release circuit device and
Bracket and vehicle-mounted bracket with the circuit device.
[background technique]
Direct current generator is the motor that direct current energy is converted to mechanical energy.It is dragged due to its good speed adjusting performance in electric power
It is used widely in dynamic.
Direct current generator can be divided into large-scale, medium-sized and DC micro-motor by specification size, universal small-sized straight in the market
Galvanic electricity machine be mostly it is unidirectional, usually do not have reverse function when power is off, and some specific scenes exactly need to utilize
It is disconnected with comprehending on vehicle-mounted bracket after automobile closes power supply such as the electric vehicle-mounted support product on some automobiles to this function
Electricity faces the mobile phone that a puzzlement is vehicle-mounted bracket at this time and does not take not come out, and user can only restart automobile and take again at this time
Mobile phone out, but it is relatively complicated under such circumstances, and the continuous start and stop of automobile can damage interior component.Utilization scene ratio also
Such as some fixtures or safety-valve, in the event of the nipped situation of human finger, even if safety protective circuit and
When power off, but human body still can not extract finger at once, to bring secondary injury.
Therefore the DC micro-motor for having orientation (mostly reversed) release comes into being, but it is this kind of design be used in it is small
The necessary feature of type direct current generator is: driving circuit can bear high current；Therefore the prior art, which often uses, has high current
The superpower super capacitor of discharge capability is realized, but there are some disadvantages below super capacitor:
1, the price is very expensive for super capacitor first, and a genuine super capacitor is easily close to thousands of, for manufacturer,
Thousand dress super capacitors are taken to realize the protection of some small parts or realize certain functions, business efficiency is to be worthy of consideration
The problem of.
2, the resistance of super capacitor is higher, and the super capacitor of low capacitor has up to hundreds of ohm of resistance, it is known that electricity
The peak point current on road depends on electromotive force of source and internal resistance, and in the very high situation of super capacitor resistance, for some low capacitors
Super capacitor for, be not able to satisfy the requirement of peak point current, and the super capacitor of bulky capacitor, further relate to first point of price said
Problem.
If being 3, that electric current caused by its big internal resistance is released problem there is also any using super capacitor, DC micro-motor
It just can not operate normally lower than a certain voltage value, MCU at this time is but also being operated, in the process that electric current is gradually released
In, so that MCU work in power-failure memory mode, starting next time, is easy to cause partial function abnormal, if I0 grid are locked, MCU, which is run, to fly
Deng.
4, when super capacitor is used in DC micro-motor, due to its high-resistance characteristic, it is easy to cause charge and discharge electric
Pressure difference is such as charged using the voltage of 5V, and electric discharge but only has 4.5V~4.7V, reduces efficiency utilization.
Therefore the above problem can be overcome and apply to the driving circuit device of DC micro-motor by how designing one kind, be
Technology today problem to be solved.
[summary of the invention]
In order to overcome the problems referred above, the present invention provides a kind of clamping device power-off targeted release circuit device and has the electricity
The bracket and vehicle-mounted bracket of road device.
In order to solve the above technical problem, the present invention provides a technical solution is as follows: the present invention provides a kind of clamping device
Targeted release circuit device is powered off, circuit device includes way circuit, and way circuit includes the motor control for controlling dc motor
Circuit processed, and include electricity in circuit for controlling motor for transmitting the MCU control circuit that electric signal instructs to circuit for controlling motor
Machine driving chip and energy storage type electrolytic capacitor；The positive/negative pole plate of energy storage type electrolytic capacitor and the power supply of motor drive ic are positive/negative
Pole pin respectively corresponds connected, and MCU control circuit includes control chip, controls the positive pole pin serial connection of chip/be connected in parallel on
Between positive plate and the positive pin of motor drive ic, when way circuit power-off, energy storage type electrolytic capacitor can discharge so that electricity
Machine driving chip and control chip continue to operate, and control chip is used to control the pin and motor drive ic of motor drive ic
Electric connection is respectively corresponded, chip controls chip makes it control dc motor in t to transmit electric signal to motor drive ic
It is rotated backward in time second, wherein t setting and 0~2s.
It preferably, further comprise photoelectric coupled circuit and resistance and capacitor；After resistance and capacitor are in parallel, it is connected on to be set to and bears
Between pole plate and the negative pin of motor drive ic, photoelectric coupled circuit includes photoelectric coupling driver and photoelectrical coupler, light
It is electrically coupled between the same series connection of anode of driver and negative plate and the negative pin of motor drive ic, and is series connection with resistance
Relationship；The anode of the cathode connection and photoelectrical coupler of photoelectric coupling driver, the cathode of photoelectrical coupler are connected to control core
At the pin that the corresponding control direct current generator of on piece stops；When the electric current of way circuit is zero, capacitor electric discharge, by way of the electric current of resistance
Linear change can be ensued, so as to cause the response of photoelectric coupling driver, photoelectric coupling driver makes photoelectrical coupler electric
Property conducting, when photoelectrical coupler electrically conducts, the pin that the corresponding control dc motor of control chip stops is just
Electric signal can be received, is stopped operating with controlling dc motor.
It preferably, further comprise power supply input circuit, power supply input circuit, which can correspond to, to be electrically connected in input male connector
Positive/negative pin on to constitute positive/negative input terminal, the electrode input end of power supply input circuit is connected to control chip power supply
Input detection pin on.
It preferably, further comprise low pressure difference linearity voltage-stabiliser tube, the output end of low pressure difference linearity voltage-stabiliser tube is connected to motor
On the positive pin of driving chip, low pressure difference linearity voltage-stabiliser tube input terminal is connected to input detection of the control chip for power supply and draws
On foot.
It preferably, further comprise infrared sensing circuit, infrared sensing circuit includes infrared sensor, infrared sensing circuit
It is connected on the corresponding pin of control chip, infrared sensor is series in infrared sensing circuit and does not form access, when infrared
When sensor sensing is to exterior object, so that infrared sensing circuit forms access, start accordingly, to give motor drive to control chip
Dynamic chip, which issues, to be instructed so that dc motor operates.
Preferably, input male connector be microUSB, BNC male connector, two/tri- hole male connectors it is any.
It preferably, further comprise key, key is the key or mechanical key of external touch formula, by being connected to
On the corresponding pin for controlling chip, human contact or the corresponding pin of extruding key meeting trigger control chip are begun to respond to, from
Motor drive ic control dc motor is issued a command under and to be operated.
It preferably, further comprise light emitting diode, light emitting diode connects on the corresponding pin of control chip.
Preferably to solve the above problems, the present invention also provides a kind of bracket, the bracket by outer goods support and
When fixed, need to use above-mentioned clamping device power-off targeted release circuit device.
Further preferably to solve the above problems, the present invention also provides a kind of vehicle-mounted bracket, which includes two
Clamp arm, two clamp arm when two clamp arm are discharged, are both needed to when electronic product is fixed, and after vehicle-mounted bracket power-off
Use above-mentioned clamping device power-off targeted release circuit device.
Compared with prior art, a kind of clamping device power-off targeted release circuit device provided by the present invention has as follows
The utility model has the advantages that
1, the present invention using energy storage type electrolysis capacitance connection on motor drive ic, and simultaneously will control chip-in series or
Person is connected in parallel between the positive plate of energy storage type electrolytic capacitor and the positive pin of motor drive ic, therefore when way circuit power-off hair
When raw, under the characteristic of energy storage type electrolytic capacitor, it can discharge to control chip phase to control chip and motor drive ic power supply
The pin response answered, is judged as power-off, instructs to issue electric signal to motor drive ic, and motor drive ic is into one
Step control direct current generator carries out counter-rotational movement in 0~2s；It can be seen from the above, whole process smoothness is simplified, and pass through
Energy storage type electrolytic capacitor discharges this characteristic, so that it may to provide corresponding required electric energy after power-off, and control the time shorter
In time, to generate the movement of release at the first time to user, and using energy storage type electrolytic capacitor as the function after power-off
Element has advantage more apparent than capacity cell in conventional art as follows:
1., the capacitance of unit volume it is very big, the capacitor than other types is big by tens to hundreds times.
2., specified capacity can accomplish very big, tens of thousands of μ f even several f can be easily done.
3., price than other types have overwhelming dominance because the composition material of electrolytic capacitor is all common industry
Material, such as aluminium etc., the equipment for manufacturing electrolytic capacitor are also all common industrial equipments, can be mass produced, cost phase
To relatively low.
2, stall detection, photoelectric coupling driver and photoelectric coupling further are carried out to direct current generator using photoelectric coupled circuit
Device series connection, so that the weak current of photoelectrical coupler can to control the corresponding pin response of chip, to close after open circuit
Dc motor, such design sense are, can be automatically stopped when each motor rotation blockage, illustratively such as: Ruo Benfa
The bright circuit device is used in handset bracket, then the clamping device on handset bracket is after touching mobile phone, without
Method continues to hold it tighter, then the direct current generator in its circuit device will stall, direct current should be stopped at once at this time
Machine prevents direct current generator from damaging；And when restarting every time, all in the state of dc motor stalling, first is that guaranteeing peace
Quan Xing, second is that playing reset response.
3, further power supply input circuit and input male connector are directly connected to, and power supply input circuit is correspondingly connected in control core
It is such to be advantageous in that on the input detection pin of piece power supply, it can will control chip and regard the electronic component that core assigns instruction,
So motor drive ic is equivalent to executive component, and dc motor is equivalent to and is performed part, other circuits such as light
Coupling circuit is equivalent to judgment component, one by one clearly, ensure that the integrality and smoothness of operation, and input male connector can be
MicroUSB, BNC male connector, two/tri- hole male connectors it is any.
4, low pressure difference linearity voltage-stabiliser tube can play the role of current stabilization to way circuit, to prevent the total electricity of Current Voltage overload damage
The electronic component on road.
It 5, further comprise infrared sensing circuit, infrared sensing circuit includes infrared sensor, utilizes the physics of infrared ray
Property measures, and infrared sensor measurement Shi Buyu testee directly contacts, and rubs because may be not present, and have spirit
Sensitivity is high, reacts the advantages that fast, so that dc motor moment captures external physical change, to realize operating.
It 6, further comprise key in addition to above-mentioned infrared sensing circuit, key is the key or machine of external touch formula
The key of tool formula, by being connected on the corresponding pin of control chip, human contact or extruding key can trigger control chips pair
The pin answered is begun to respond to, thus under issue a command to motor drive ic control dc motor operated so that clamping machine
Structure tightening is unclamped.
It 7, further comprise light emitting diode, light emitting diode connects on the corresponding pin of control chip, therefore can root
It is shown according to the situation of dc motor to carry out different light, for example when night state, light emitting diode can be opened to user
Certain visual field is provided, or shows green light etc. when common charging.
8, clamping device provided by the invention can use the circuit device, and after realizing power-off, the position of clamping be will do it
Release movement, so that the article of clamping is released, which can be widely used in self-shooting bar, handset bracket, electronic
Tool etc. can prevent from needing to be re-energised after powering off just taking out clamped article, and convenient and simple and reliability of operation is very
By force.
9, bracket and vehicle-mounted bracket provided by the invention, circuit device of the invention can directly be applied to thereon, with
To electronic product, perhaps the movement clamped is not only may be implemented in clamping or fixation in other articles such as microphone, cup, and
After a loss of power to carry out a release job.
[Detailed description of the invention]
Fig. 1 is power supply input circuit in first embodiment clamping device power-off targeted release circuit device provided by the invention
Circuit diagram；
Fig. 2 is MCU control circuit 2 in first embodiment clamping device power-off targeted release circuit device provided by the invention
Circuit diagram；
Fig. 3 is circuit for controlling motor in first embodiment clamping device power-off targeted release circuit device provided by the invention
The circuit diagram of 3 part.
Fig. 4 is circuit for controlling motor in first embodiment clamping device power-off targeted release circuit device provided by the invention
The circuit diagram of 3 another part.
Detailed description of the invention: 1, power supply input circuit；2, MCU control circuit；3, circuit for controlling motor；4, infrared sensing circuit；
100, male connector is inputted；GND: negative input；U10: control chip, 200, infrared sensor；U6: motor drive ic；U3, light
It is electrically coupled driver；U7, photoelectrical coupler；EC1, EC2: energy storage type electrolytic capacitor；LDO: low pressure difference linear voltage regulator；LED: hair
Optical diode；C33, capacitor；R26, resistance；D6, unilateral diode；10, electrode input end；20: the first branch；30, second
Road；40, third branch；50, the 4th branch；60, the 5th branch；70, the 6th branch, 201: the differential signal of the first branch；M1,
Dc motor.
[specific embodiment]
In order to make the purpose of the present invention, technical solution and advantage are more clearly understood, below in conjunction with attached drawing and embodiment,
The present invention will be described in further detail.It should be appreciated that the specific embodiments described herein are merely illustrative of the present invention,
It is not intended to limit the present invention.
Clamping device power-off targeted release circuit device provided by the invention can be transported with realizing the function of targeted release
With for clamping, the mechanism of fixed operation tool, the clamping plate of such as support of electronic product, automobile data recorder and electric wrench, pincers
Son etc..
With reference to the accompanying drawing and embodiment the present invention is further described, and the noun that will hereafter mention is given
It explains:
Motor rotation blockage: a kind of situation of motor still output torque when revolving speed is 0 turn, typically mechanical or people
For.Motor load is excessive, dragging mechanical breakdown, bearing damage sweep motor caused by due to hall etc. can not start or
The phenomenon that stopping operating.
Photoelectric coupling driver: the device for driving photoelectrical coupler to respond, similar switch element.
Photoelectrical coupler: hereinafter referred optocoupler；Optocoupler components are one groups for carrying out transmission telecommunications number using light as media
Device, function are that electric signal input, outlet chamber is usually maintained to have good buffer action, electric signal can be made to pass through when needing
The transmission mode of separation layer, wherein it is by light emitting source using light as a kind of switching device of electrical-optical-electrical of media transmission electric signal
It is formed with light-receiving device two parts.Light emitting source and light-receiving device are assembled in same closed shell, use transparent insulator to each other
Isolation.The pin of light emitting source is input terminal, and the pin of light-receiving device is output end, and common light emitting source is light emitting diode, light
Device is photodiode, phototriode etc..
LDO: being a kind of low pressure difference linear voltage regulator.Use the transistor or field-effect tube run in its linear region
(FET), the voltage of excess is subtracted from the input voltage of application, generates the output voltage through overregulating.So-called pressure drop voltage is
Refer to the input voltage needed for voltage-stablizer maintains output voltage within its rated value or more 100mV with output voltage difference most
Small value.
It should be noted that the specific embodiment of the invention and diagram only refer to and are labelled with member related to the present invention
Device, but it is the integrality of circuit, diagram, which gives all circuit elements, to be shown.
Please first substantially refering to fig. 1~Fig. 4, the embodiment of the present invention one provide a kind of clamping device power-off targeted release circuit dress
(hereinafter referred to as way circuit) is set, mainly applies to the targeted release control of DC micro-motor comprising power supply input circuit
1, MCU control circuit 2 and circuit for controlling motor 3, the input of electric energy needed for the power supply input circuit 1 is used for way circuit, electricity
Machine control circuit 3 is used to control the operating start and stop of DC micro-motor, and MCU control circuit 2 then gives motor control according to response
Circuit 3 processed assigns related command, to realize the targeted release realized by MCU control circuit 2 to DC micro-motor.
Referring to Fig. 1, wherein power supply input circuit 1 can be electrically connected in input male connector 100, input male connector 100 can be used
Grafting is carried out in the female with external equipment, to power to entire circuit, input male connector 100 can be used microUSB, BNC public
Head, two/tri- Kong Gongtou, the present embodiment are optionally microUSB male connector as input male connector 100, and those skilled in the art can manage
Solution, in the application of small-sized DC motor, data terminal/foot of microUSB male connector is not no Essential Action, therefore should
The end EP of microUSB male connector and the end GND draw circuit and intersect at point C, and it is defeated as the present embodiment way circuit to draw circuit from the end V+
The electrode input end 10 entered further goes out from point C and draws circuit, and the one of grounding of the circuit, another branch is as this
The earth polar input terminal GND (hereinafter referred to as negative input) of embodiment way circuit, i.e. ground wire are used；And wherein in electrode input end
10 and negative input GND multiple adjusting capacitors in parallel.
It is appreciated that capacitor is adjusted first is that in order to increase the capacitance that filtering adjusts capacitor using in parallel between two branches, two
It is to reduce opposite equivalent inductance value, and the advantage of microUSB is used to be to be adapted to most of electronic product charging now
Head, if two/tri- hole male connector of single use or other male connectors, suitability is not strong, to increase the versatility of the product, still
In the environment of fixed-site, such as the small-sized brushless dc motor of the curler under domestic environment, then in contrast
It is higher using two/tri- hole male connector relative reliabilities.
Referring to Fig. 2, the concrete model that MCU control circuit 2 includes control chip U10, control chip U10 not limits
Fixed, in the present embodiment, optionally with the chip of the PIC16F630/676 of model microchip, mass 14 are drawn
Foot, diagram and this paper or less are indicated with the 1st~14 foot, wherein the 3rd foot connects external key (not shown), key can be touching
Perhaps as human contact or extruding key, the 3rd foot of trigger control chip U10 starts mechanical key the formula key of touching
Response instructs so that control chip U10 is issued to circuit for controlling motor 3, to control the operating of direct current generator.
Wherein the 4th pin is to detect pin for controlling the input of chip U10 power supply, and detection of power loss is sentenced by this foot
It is disconnected, therefore the 4th pin utilizes on circuit connection electrode input end 10, and draws second branch 30 from the circuit, wherein second
Road 30 and electrode input end 10 are parallel relationship, i.e. a part of traffic organising chip U10 of the electric current of electrode input end 10 is it
Power supply, another part current direction second branch 30.
1st foot and the 14th foot are respectively the VDD foot and negative input foot of control chip U10, therefore the 1st foot and the 14th
Foot is separately connected the first branch 20 and negative input, wherein the 13rd foot is the pin of LED indication function, hair is arranged at the 13rd foot
Optical diode LED, the 13rd foot are directly connected to negative input after connecting Light-emitting diode LED.
Further, the 2nd pin is the pin for controlling motor and stopping, and draws third branch 40 from the 2nd pin；5th, 6 draw
Foot is motor control signal pin, depending on the control program of control chip U10 setting, wherein the 5th pin draws the
The 50, the 6th pin of four branches draws the 5th branch 60；
Further, in some particular embodiments, set infrared sensing circuit 4, remaining the 7th, 8,9,10 this four
A pin is the pin for realizing infrared induction function, therefore the 7th, 8,9,10 this four pins are connected to infrared sensing circuit 4, red
Outer sensing circuit 4 includes infrared sensor 200, and infrared sensor 200 is connected in infrared sensing circuit 4 and is not formed access,
When infrared sensor 200 experiences exterior object, entire infrared sensing circuit 4 can be connected in resistance, so as to cause the 7th, 8,9,
10 this four pins are begun to respond to, and control chip U10 can issue motor drive ic U6 and instruct, and motor drive ic U6 is into one
Step, which receives, to be instructed so that motor starts operation, those skilled in the art it will be understood that the infrared sensing circuit 4 is traditional circuit,
It only realizes infrared sensing function and sets, specific electric connection mode does not illustrate excessively herein.
It is appreciated that infrared sensing circuit is relatively conventional in the use of direct current generator, illustratively such as: electronic self-shooting bar
In, when detecting that mobile phone is put into fixture, electronic self-shooting bar meeting Automatic-clamping mobile phone, so that mobile phone is fixed.
The MCU control circuit 2 further includes the electric elements for pressure regulation and drainage, and the present embodiment does not illustrate one by one.
It is appreciated that above-mentioned control chip U10, when replacing model, the position of pin and quantity can change,
The present invention only facilitates illustrated embodiments one, does not limit the connection relationship and positional relationship of pin.
Referring to Fig. 3, the circuit for controlling motor 3 in embodiment one includes motor drive ic U6, this field tradesman
It will be understood that the mode of direct current generator driving has very much, but driving principle is invariable, the regulation of motor speed
There are three types of generally speaking: weak magnetic speed-up, variable voltage control and serial-resistance speed-regulation, optionally, for illustrating the present invention in the present embodiment
Motor drive ic U6 use small power DC motor drive ic, illustratively such as: model can be LG9110.
Circuit for controlling motor 3 further include: resistance R26, energy storage type electrolytic capacitor EC1, energy storage type electrolytic capacitor EC2 are (following
Abbreviation EC1, EC2), and the electric elements of pressure regulation and drainage are partially used for, the present embodiment does not illustrate one by one.
It is appreciated that energy storage electric electrolysis condenser is widely used in household electrical appliance and various electronic products, capacity model
Larger, generally 1~33000 μ F is enclosed, rated operational voltage range is 6.3~700V, and energy storage electric electrolysis condenser price is just
Preferably, very high using the efficiency in DC micro-motor, therefore in the present embodiment using EC1, EC2 as the energy supply after power-off
It uses, to realize maximum that cost performance arrives.
Wherein circuit connecting relation is as follows, and motor drive ic U6 shares eight pins, and output end is that OA pin and OB draw
Foot, input terminal include positive polarity pin (hereinafter referred to as VCC foot), the mould of exciting current pin (hereinafter referred to as VM foot), power supply
Quasi- negative pin (hereinafter referred to as AGND foot), power cathode pin (hereinafter referred to as PGND foot), remaining pin the present embodiment are different
One illustrates；
Wherein AGND foot, PGND foot draw branch respectively and intersect at the similarly extraction branch intersection respectively of point A, VM foot, VCC foot
In point B, wherein in VDD foot of the positive plate connection from MCU control circuit 2 of EC1, EC2, i.e., the above-mentioned first branch 20, and
It is the unilateral diode D6 towards A point that water conservancy diversion direction is provided at VCC foot, draws another branch in one end of positive plate, with
201 feet from the first branch 20 are connected, therefore the first branch 20, V foot connect on point A, so that the external first branch
20,201 feet are in parallel relationship, it should be noted that 201 feet of the MCU control circuit 2 are not motor drive ic U6
VCC foot, 201 feet of MCU control circuit 2 be for the i.e. differential signal of the first branch 20 on MCU control circuit VDD foot, it is exemplary
Such as: the wherein VDD foot of MCU control circuit, it may be possible to 3.3V, 201,10V, 12V, 15V, 18V, 24V etc., therein 201
Foot is power supply all the way therein；
Further, the OA foot of the output end of motor drive ic U6 and OB foot are connected with dc motor M1, to pass through
The electric energy of input terminal makes dc motor M1 carry out operating, stop, inverted command.
It is appreciated that usually, EC1, EC2 can just charge at that moment what power supply input circuit 1 was connected, wait until
When the voltage at the both ends EC1, EC2 is equal to the voltage that power supply input circuit 1 inputs, EC1, EC2 just stop charging, it is possible to understand that
For when EC1, EC2 both end voltage are equal to V+ foot in power supply input circuit 1, EC1, EC2 are in direct current interruption state；Herein it
Between, dc motor M1 is forward rotation direction always, with should power supply input circuit 1 disconnect when EC1, EC2 can then discharge, it is right
It indicates positive symbol for polarized capacitor, on EC1, EC2 to flow at cathode, here it is dc capacitor discharge current sides
To, therefore unilateral diode D6 is added so as to can make the direction of EC1, EC2 will not be in other branch when EC1, EC2 electric discharge
Road forming circuit, causes waste of energy.
Further, including low pressure difference linearity voltage-stabiliser tube (hereinafter referred to as LDO), output end, that is, negative pole end VOUT of LDO go here and there
It is associated on point A, and the 4th pin that input terminal VIN is connected on control chip U10 is used to control the input inspection that chip U10 powers
It surveys on pin, i.e. second branch 30, those skilled in the art are designing it will be understood that the most important index of LDO is exactly stability
Usually see in route and have big and small capacitor (not labeled) in its output end VOUT, when way circuit power-off, prevents electricity
Stream moment is excessive, damages to way circuit, plays the role of giving motor drive ic U6 lowering and stabilizing blood pressure using LDO.
It further comprise capacitor C33 incorporated by reference to Fig. 3 and Fig. 4, capacitor C33 can be conventional capacitive or energy storage type
After electrolytic capacitor, resistance R26 and capacitor C33 parallel connection, it is connected between the circuit of the negative plate of point B and EC1, EC2, while the electricity
It is in series with the 6th branch 70 between road, includes the electricity of photoelectric coupling driver U3 and photoelectrical coupler U7 on the 6th branch 70
Road (hereinafter referred to as photoelectric coupled circuit), in photoelectric coupled circuit, photoelectric coupling driver U3 is similar to switch element, illustratively such as:
Triode ends when high level, triode ON when low level, therefore input terminal, that is, anode of photoelectrical coupler U7 is terminated at
On photoelectric coupling driver U3 output end, that is, negative pole end, input terminal, that is, positive terminal of photoelectric coupling driver U3 is connected serially to resistance
R26 connects between the circuit of point B, i.e. between the 6th branch 70, output end, that is, cathode of photoelectrical coupler U7 terminates at MCU control
On 2nd pin of circuit 2, i.e., between above-mentioned third branch 40；Rest part is used for the electric elements of pressure regulation and drainage, Yi Jijie
The connection relationship of negative input can be shown that the present embodiment does not illustrate one by one by diagram.
The necessary electrical connection of clamping device provided by the invention power-off targeted release circuit device is carried out above
It illustrates, principle explanation when being below specifically used:
Incorporated by reference to Fig. 1 to Fig. 4 and foregoing description, the circuit which provides is mainly used in dc motor M1 stall
When targeted release control, i.e., in dc motor M1 stall, assign closing dc motor using MCU control circuit 2
The order of M1；When total electric down circuitry, dc motor M1 can be allowed to realize reversion.
It is as follows that specific working method is detected when to dc motor M1 stall, when dc motor M1 is worked normally,
Way circuit will not occur to trigger phenomenon, i.e. way circuit is in the normally input constant current of power supply input circuit 1, MCU control electricity
Road 2 and circuit for controlling motor 3 are normal operating condition, and dc motor M1 is run at this time with constant power and revolving speed.
It is appreciated that dc motor M1 can be electromagnetic motor and permanent magnet motor, with specific reference to use environment
Depending on, wherein permanent magnet motor performance is close with electromagnetic type shunt motor, and starting torque is larger, and mechanical property is hard, load
Rotation speed change is little when variation, is suitable for small power DC and drives, such as electronic toy, electric tool, stereo set, automobile electricity
Device, therefore this city implementation is optionally permanent magnet motor, dc motor M1 include stator winding and rotor, therefore direct current
When motivation M1 is rotated, the rotating excitation field dragging rotor rotation that stator winding is formed, and magnetic field caused by induced current in rotor
Also back-emf, that is, induction reactance are induced in stator winding, plays the role of preventing motor stator electric current increased；Therefore way circuit
In the even running stage.
When dc motor M1 stall, power factor reduce, if motor rotation blockage, above-mentioned back-emf also without,
Dc motor M1 is just as connecing an inductance element in way circuit, the only resistance and inductance of its own, natural electric current meeting
It greatly increases.According to the size of dc motor M1 capacity and processing technology difference, motor rotation blockage electric current is generally Rated motor
5-12 times of electric current.
Therefore after realizing power-off dc motor M1, the increase of dc motor M1 electric current meeting several times, the meeting on resistance R26
Sufficiently high voltage is mapped out, and way circuit is exactly to detect this phenomenon to realize the judgement of stall and stop motor rotation
, the core devices of detection are photoelectric coupling driver U3, by being pre-designed a voltage monitoring point, when resistance R26 is logical
When voltage after overcurrent is close to preset electrical voltage point, photoelectric coupling driver enters linear conducting region, photoelectrical coupler U7
Internal Weak-luminescence, but because the limitation of its CTR (photoelectricity transmission ratio), makes the faint conducting of its photoelectrical coupler U7, but
It is not enough to drive the output stage of photoelectrical coupler U7 to invert, when detecting that the voltage on R26 continues to rise to equal to preset electricity
When pressure value, photoelectric coupling driver U3 enters saturation conduction state, photoelectrical coupler U7 normal luminous, at this time photoelectrical coupler U7
Output stage saturation, it is above-mentioned it is found that low level passes through the notice control chip U10 of third branch 40, control to export low level
After chip U10 receives order, control chip U10 passes through the 4th branch 50 on the 5th pin, the 5th branch 60 on the 6th pin
It controls motor drive ic U6 and closes motor.
Further, when way circuit powers off, the specific working mode at this time inverting its motor M1 is as follows, works as power-off
When generation, the 4th pin of control chip U10 can be turned to low level from high level, this process control chip U10 is judged as
Power down occurs, and most of function of way circuit can all fail at this time, and workable part is control chip U 10, motor driven core
Piece U6, this two-part electric current are taken from the characteristic of EC1, EC2 electrolytic capacitor and can send after control chip U10 to power down occurs
The signal of preset motor release direction gives motor drive ic U6, allows its work when being lower than 1s in fixed release direction
Between, so that dc motor M1 completes the movement of power down reversion, and after completing such movement, the electric energy of EC1EC2
Almost drain.
It is appreciated that it can be seen from the above, EC1, EC2 are energy storage type electrolytic capacitor, as a kind of container that can store charge,
It has the characteristic of electric discharge, and when way circuit is in off-position, EC1, EC2 will do it electric discharge, pass through circuit for controlling motor 3
It is found that its EC1, EC2 can form access by the first branch 20 and motor drive ic U6, control chip U10 when discharging, at this time
The order that motor drive ic U6 assigns reversion to dc motor M1 can be controlled by program by controlling chip U10.
Further, control chip U10 controls motor drive ic U6, so that dc motor M1 is anti-within t seconds time
Turn, wherein t is set as 0~2s, it is preferable that the t is set as 0~1s.
It is appreciated that control chip U10 is the control chip of similar single-chip microcontroller, above-mentioned finger can be realized by timing routine
It enables, the meaning of instruction setting is, after dc motor M1 stalling, in many equipment, needs a reversion release
Order, for example vehicle-mounted electronic handset bracket product of an actual product also bring some ask while bringing convenience
Topic, after automobile closes power supply, the mobile phone in mobile phone support is not just taken not come out, therefore the instruction can be used for thereon
Mobile phone is discharged.
In some embodiments, motor control can be likewise entered by OA foot and OB foot with it by setting motor drive ic U6
Circuit 3 charges to EC1, EC2, by above-mentioned it is found that can generate 5-12 times of rated current after dc motor M1 stall
Electric current, therefore at this time setting motor drive ic U6 can charge back to EC1, EC2, electric energy can be made full use of, reached most
The efficiency changed greatly.
In order to solve the above technical problem, the present invention provides another technical solution is as follows: the second embodiment of the present invention is also
A kind of power-off targeted release system of small-sized DC motor is provided, which includes that the clamping device power-off in embodiment one is fixed
To release circuit device.
In order to solve the above technical problem, the present invention provides another technical solution is as follows: the third embodiment of the present invention is also
A kind of bracket is provided, which needs to use the clamping device in embodiment one when supporting by outer goods and being fixed
Power off targeted release circuit device, when in use, the bracket can fixed clamp electronic product, cup, microphone, when the bracket power off
When, discharge folded article using the power-off targeted release device of small-sized DC motor.
In order to solve the above-mentioned technical problem, it is as follows that the present invention further provides schemes: the fourth embodiment of the present invention also mentions
For a kind of vehicle-mounted bracket, vehicle-mounted bracket is the tool that user allows electronic product fixed on the way in traveling, which includes two
Clamp arm (not shown), two clamp arm when electronic product is fixed, and when the vehicle-mounted bracket power-off after, two institutes
When stating clamp arm and being discharged, it is required to use the clamping device power-off targeted release circuit device in embodiment one, is using
When, which can fixed clamp mobile phone, plate, microcomputer, board.
Those skilled in the art are it will also be understood that if by circuit device of the present invention or system, small DC
All or part of circuit of machine is combined by condensed, simple change, series-parallel mutually phase inversion etc. modes, is replaced, such as each group
Part, route, electronic component put shift position；Or the product for being constituted it is wholely set；Or design for disassembly；All group
Component after conjunction can form circuit device/equipment/device with specific function, with such circuit device/equipment/device
It is also fallen in protection scope of the present invention instead of corresponding assembly of the present invention.
Compared with prior art, a kind of clamping device power-off targeted release circuit device provided by the present invention has as follows
The utility model has the advantages that
1, the present invention using energy storage type electrolysis capacitance connection on motor drive ic, and simultaneously will control chip-in series or
Person is connected in parallel between the positive plate of energy storage type electrolytic capacitor and the positive pin of motor drive ic, therefore when way circuit power-off hair
When raw, under the characteristic of energy storage type electrolytic capacitor, it can discharge to control chip phase to control chip and motor drive ic power supply
The pin response answered, is judged as power-off, instructs to issue electric signal to motor drive ic, and motor drive ic is into one
Step control direct current generator carries out counter-rotational movement in 0~2s；It can be seen from the above, whole process smoothness is simplified, and pass through
Energy storage type electrolytic capacitor discharges this characteristic, so that it may to provide corresponding required electric energy after power-off, and control the time shorter
In time, to generate the movement of release at the first time to user, and using energy storage type electrolytic capacitor as the function after power-off
Element has advantage more apparent than capacity cell in conventional art as follows:
1., the capacitance of unit volume it is very big, the capacitor than other types is big by tens to hundreds times.
2., specified capacity can accomplish very big, tens of thousands of μ f even several f can be easily done.
3., price than other types have overwhelming dominance because the composition material of electrolytic capacitor is all common industry
Material, such as aluminium etc., the equipment for manufacturing electrolytic capacitor are also all common industrial equipments, can be mass produced, cost phase
To relatively low.
2, stall detection, photoelectric coupling driver and photoelectric coupling further are carried out to direct current generator using photoelectric coupled circuit
Device series connection, so that the weak current of photoelectrical coupler can to control the corresponding pin response of chip, to close after open circuit
Dc motor, such design sense are, can be automatically stopped when each motor rotation blockage, illustratively such as: Ruo Benfa
The bright circuit device is used in handset bracket, then the clamping device on handset bracket is after touching mobile phone, without
Method continues to hold it tighter, then the direct current generator in its circuit device will stall, direct current should be stopped at once at this time
Machine prevents direct current generator from damaging；And when restarting every time, all in the state of dc motor stalling, first is that guaranteeing peace
Quan Xing, second is that playing reset response.
3, further power supply input circuit and input male connector are directly connected to, and power supply input circuit is correspondingly connected in control core
It is such to be advantageous in that on the input detection pin of piece power supply, it can will control chip and regard the electronic component that core assigns instruction,
So motor drive ic is equivalent to executive component, and dc motor is equivalent to and is performed part, other circuits such as light
Coupling circuit is equivalent to judgment component, one by one clearly, ensure that the integrality and smoothness of operation, and input male connector can be
MicroUSB, BNC male connector, two/tri- hole male connectors it is any.
4, low pressure difference linearity voltage-stabiliser tube can play the role of current stabilization to way circuit, to prevent the total electricity of Current Voltage overload damage
The electronic component on road.
It 5, further comprise infrared sensing circuit, infrared sensing circuit includes infrared sensor, utilizes the physics of infrared ray
Property measures, and infrared sensor measurement Shi Buyu testee directly contacts, and rubs because may be not present, and have spirit
Sensitivity is high, reacts the advantages that fast, so that dc motor moment captures external physical change, to realize operating.
It 6, further comprise key in addition to above-mentioned infrared sensing circuit, key is the key or machine of external touch formula
The key of tool formula, by being connected on the corresponding pin of control chip, human contact or extruding key can trigger control chips pair
The pin answered is begun to respond to, thus under issue a command to motor drive ic control dc motor operated so that clamping machine
Structure tightening is unclamped.
It 7, further comprise light emitting diode, light emitting diode connects on the corresponding pin of control chip, therefore can root
It is shown according to the situation of dc motor to carry out different light, for example when night state, light emitting diode can be opened to user
Certain visual field is provided, or shows green light etc. when common charging.
8, clamping device provided by the invention can use the circuit device, and after realizing power-off, the position of clamping be will do it
Release movement, so that the article of clamping is released, which can be widely used in self-shooting bar, handset bracket, electronic
Tool etc. can prevent from needing to be re-energised after powering off just taking out clamped article, and convenient and simple and reliability of operation is very
By force.
9, bracket and vehicle-mounted bracket provided by the invention, circuit device of the invention can directly be applied to thereon, with
To electronic product, perhaps the movement clamped is not only may be implemented in clamping or fixation in other articles such as microphone, cup, and
After a loss of power to carry out a release job.
The above is only present pre-ferred embodiments, are not intended to limit the invention, all institutes within principle of the present invention
Any modification made, equivalent replacement and improvement etc. should all be comprising within protection scope of the present invention.
Claims (10)
1. a kind of clamping device powers off targeted release circuit device, the circuit device includes way circuit, and the way circuit includes
It is instructed for controlling the circuit for controlling motor of the dc motor, and for giving the circuit for controlling motor to transmit electric signal
MCU control circuit,
It is characterized in that, including motor drive ic and energy storage type electrolytic capacitor in the circuit for controlling motor；
The positive/negative pole plate of the energy storage type electrolytic capacitor is respectively corresponded with the power supply positive/negative pin of motor drive ic to be connected,
The MCU control circuit includes control chip, the positive pole pin serial connection for controlling chip/be connected in parallel on the anode
Between plate and the positive pin of motor drive ic, when the way circuit power-off when, the energy storage type electrolytic capacitor can discharge with
The motor drive ic and control chip is set to continue to operate, the pin and motor drive ic of the control chip respectively correspond
It is electrically connected, the control chip makes it control the dc motor in t to transmit electric signal to the motor drive ic
It is rotated backward in time second, wherein t setting and 0~2s.
2. clamping device as described in claim 1 powers off targeted release circuit device, which is characterized in that
It further comprise photoelectric coupled circuit and resistance and capacitor；
After the resistance and capacitor are in parallel, be connected on set on the negative pin of the negative plate and the motor drive ic it
Between, the photoelectric coupled circuit includes photoelectric coupling driver and photoelectrical coupler, and the anode of the photoelectric coupling driver is same
It between series connection and the negative plate and the negative pin of the motor drive ic, and is series relationship with resistance；The photoelectricity
The anode of the cathode connection and photoelectrical coupler of coupled driver, the cathode of photoelectrical coupler is connected to right on the control chip
At the pin that direct current generator stopping should be controlled；
When the electric current of the way circuit is zero, capacitor electric discharge, the electric current by way of the resistance can ensue linear change, from
And the photoelectric coupling driver is caused to respond, the photoelectric coupling driver makes the photoelectrical coupler electrically conduct, when
When photoelectrical coupler electrically conducts, the pin that the corresponding control dc motor of control chip stops will receive electricity
Signal is stopped operating with controlling dc motor.
3. clamping device as described in claim 1 powers off targeted release circuit device, which is characterized in that further comprise power supply
Input circuit and input male connector, the power supply input circuit can correspond on the positive/negative pin being electrically connected in input male connector
To constitute positive/negative input terminal, the electrode input end of the power supply input circuit is connected to the input detection of control chip power supply
On pin.
4. clamping device as described in claim 1 powers off targeted release circuit device, which is characterized in that further comprise low pressure
The output end of poor linear voltage stabilization pipe, the low pressure difference linearity voltage-stabiliser tube is connected on the positive pin of motor drive ic, described
Low pressure difference linearity voltage-stabiliser tube input terminal is connected to input detection pin of the control chip for power supply.
5. clamping device as described in claim 1 powers off targeted release circuit device, which is characterized in that further comprise infrared
Sensing circuit, infrared sensing circuit include infrared sensor, and infrared sensing circuit is connected to the corresponding pin of the control chip
On, infrared sensor is series in infrared sensing circuit and is not formed access, when infrared sensor senses exterior object, with
So that infrared sensing circuit is formed access, so that the control chip starts accordingly, issues instruction so that institute to motor drive ic
State dc motor operating.
6. clamping device as claimed in claim 3 powers off targeted release circuit device, which is characterized in that the input male connector is
MicroUSB, BNC male connector, two/tri- hole male connectors it is any.
7. clamping device as described in claim 1 powers off targeted release circuit device, which is characterized in that further comprise by
Key, the key are the key or mechanical key of external touch formula, described by the correspondence for being connected to the control chip
On pin, human contact or squeeze key and can trigger the corresponding pin of the control chip and begin to respond to, thus under send instructions
The dc motor is controlled to the motor drive ic to be operated.
8. clamping device as described in claim 1 powers off targeted release circuit device, which is characterized in that further comprise shining
Diode, the light emitting diode connect on the corresponding pin of the control chip.
9. a kind of bracket, it is characterized in that, the bracket needs to use power when supporting by outer goods and being fixed
Benefit require any one of 1 to 9 described in clamping device power-off targeted release circuit device.
10. a kind of vehicle-mounted bracket, the tool for allowing electronic product fixed on the way in traveling for user, which is characterized in that including two folders
Arm, two clamp arm when the electronic product is fixed, and when the vehicle-mounted bracket power-off after, two clamp arm into
When row release, it is required to use the power-off targeted release circuit device of clamping device described in any one of claims 1 to 9.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201910696836.2A CN110311601B (en) | 2019-07-30 | 2019-07-30 | Clamping mechanism outage directional release circuit device and have this circuit device's support and on-vehicle support |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201910696836.2A CN110311601B (en) | 2019-07-30 | 2019-07-30 | Clamping mechanism outage directional release circuit device and have this circuit device's support and on-vehicle support |
Publications (2)
| Publication Number | Publication Date |
|---|---|
| CN110311601A true CN110311601A (en) | 2019-10-08 |
| CN110311601B CN110311601B (en) | 2022-04-29 |
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| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| CN201910696836.2A Active CN110311601B (en) | 2019-07-30 | 2019-07-30 | Clamping mechanism outage directional release circuit device and have this circuit device's support and on-vehicle support |
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| CN (1) | CN110311601B (en) |
Citations (3)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN106094653A (en) * | 2016-08-10 | 2016-11-09 | 江苏北方湖光光电有限公司 | A kind of current control circuit based on retaining mechanism |
| CN108791104A (en) * | 2018-06-19 | 2018-11-13 | 深圳市蓝禾技术有限公司 | A kind of vehicle-mounted bracket opened automatically |
| CN208498479U (en) * | 2018-07-17 | 2019-02-15 | 深圳市京视智能科技有限公司 | Shield door multimedia system |
-
2019
- 2019-07-30 CN CN201910696836.2A patent/CN110311601B/en active Active
Patent Citations (3)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN106094653A (en) * | 2016-08-10 | 2016-11-09 | 江苏北方湖光光电有限公司 | A kind of current control circuit based on retaining mechanism |
| CN108791104A (en) * | 2018-06-19 | 2018-11-13 | 深圳市蓝禾技术有限公司 | A kind of vehicle-mounted bracket opened automatically |
| CN208498479U (en) * | 2018-07-17 | 2019-02-15 | 深圳市京视智能科技有限公司 | Shield door multimedia system |
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| Publication number | Publication date |
|---|---|
| CN110311601B (en) | 2022-04-29 |
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