CN203050353U - Car window anti-pinching control circuit based on ripple wave and current detection - Google Patents
Car window anti-pinching control circuit based on ripple wave and current detection Download PDFInfo
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- CN203050353U CN203050353U CN2012204073760U CN201220407376U CN203050353U CN 203050353 U CN203050353 U CN 203050353U CN 2012204073760 U CN2012204073760 U CN 2012204073760U CN 201220407376 U CN201220407376 U CN 201220407376U CN 203050353 U CN203050353 U CN 203050353U
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Abstract
The utility model discloses a car window anti-pinching control circuit based on ripple wave and current detection. The car window anti-pinching control circuit is formed by a motor driving control circuit, a filtering circuit, an amplification circuit, a power supply circuit and a micro-control unit. Operation current of a car window motor of a car is sampled through a sampling resistor; current sampling voltage is directly amplified and then is divided into two paths; one path passes through the filtering circuit and a ripple wave signal is filtered; then the path of the voltage is amplified again and then is sent to the micro-control unit to be treated so as to calculate a current position and a movement direction of a car window; and the other path is sent to an AD (Analogue-Digital) port of the micro-control unit and is used for judging whether the car window meets obstacles in a movement process, so that a car window anti-pinching function is realized.
Description
Technical field
The utility model is under the jurisdiction of automotive window anti-pinch control circuit technical field, particularly a kind of anti-pinching car window control circuit based on ripple and current detecting.This anti-pinching car window control circuit is mainly by micro-control unit, motor driving controling circuit, and amplifying circuit, filter circuit, power-supplying circuit is formed, and it realizes the automotive window pinch resistant functionality by the detection to Car window electric machine ripple and electric current.
Background technology
Along with vehicle intellectualized in recent years development, automobile electric car-window anti-pinch The Application of Technology is more and more wider model also.
At present, realize the technical method of automobile electric car-window pinch resistant functionality, mainly contain two kinds of Hall element scheme and infrared detection schemes.
Infrared detection method is to utilize infrared light detection to have or not foreign matter in the power windows moving range, controls glass for vehicle window by microcontroller and moves, and this method can prevent that foreign matter from directly touching glass.But in this special applied environment of automobile, especially under the harsh climate condition, can badly influence the performance of infrared light supply, in these cases, infrared system is difficult to guarantee operate as normal, be unsuitable on the automobile, so this scheme has been suffered negating of most of automotive electronics developers and automaker basically.
Automobile anti-pinch power windows based on the pressure sensor scheme is that application is more at present, this scheme often utilizes Hall element to monitor the movement position of vehicle window, when the vehicle window in the motion is subjected to horizontal or positive pressure, it can bring big load to motor, when electric current reaches to a certain degree, this scheme just thinks that power windows has run into resistance in uphill process, and sends instruction by micro-control unit and allow motor stall or counter-rotating, thereby effectively and has reliably realized pinch resistant functionality.
Hall element provides the information such as number of revolutions of motor, but the shortcoming of this scheme has increased Hall element exactly, and will design special installation site.
Chinese patent application numbers 200920196866.9 disclosed automotive window anti-pinch control circuits that detect based on ripple current in addition, its control flow chart such as Fig. 1 are to shown in Figure 2, as a rule, the ripple current signal is the small-signal that is mingled with in the sample rate current, the amplitude of ripple signal is 0.2-0.4mV, the amplitude of sample rate current is 2V-8V, when if the ripple signal is amplified to the 4V left and right sides, similar 1000 times of the multiple of amplifying circuit, the amplitude of current sample voltage just is amplified to 2000-8000V voltage so, and the supply voltage of amplifying circuit is 5V or 12V, at this moment the voltage from amplifying circuit output just can only be 5V or 12V, at this moment just lost the ripple signal, so this patent only is applicable to that electric current is less than the motor of 0.6A.
In sum, the infrared detection scheme is also infeasible in automobile, and the Hall element scheme, cost is high and install complicated.And existing ripple detection scheme patent, compliance is relatively poor.
The utility model content
Technical problem to be solved in the utility model is to provide a kind of automotive window anti-pinch control circuit based on ripple and current detecting at the existing deficiency of technical method of existing realization automobile electric car-window pinch resistant functionality, this automotive window anti-pinch control circuit dependable performance is stable, cost is low, and has solved and amplify ripple voltage and ripple is lost when causing big electric current problem.
Technical problem to be solved in the utility model can be achieved through the following technical solutions:
Anti-pinching car window control circuit based on ripple and current detecting comprises motor driving controling circuit, filter circuit, power circuit, micro-control unit, and power circuit is given motor driving controling circuit and micro-control unit power supply; Described motor driving controling circuit comprises two relays, wherein a static contact of first relay static contact and second relay and connect after connect power circuit, the moving contact of the moving contact of first relay and second relay connect respectively the automotive window motor the input anode and the input negative terminal; Another static contact of first relay and another static contact of second relay also connect the back by sample resistance ground connection; Described micro-control unit has two control signal outputs, and wherein the first control signal output and the second control signal output are connected with the control end of the line bag of the line Bao Yiduan of described first relay and second relay respectively; It is characterized in that, described sample resistance is sampled to the operating current of automotive window motor, the current conversion that obtains of sampling is sampled voltage, and described sampled voltage is divided into two-way and sends in the micro-control unit by two signal sampling mouths of micro-control unit and handle; Wherein form the ripple signal of automotive window motor behind one road sampled voltage removal direct current, another road sampled voltage input micro-control unit forms the current running current of automotive window motor.
In a preferred embodiment of the present utility model, also comprise first amplifying circuit, second amplifying circuit and filter circuit, the voltage signal input of described first amplifying circuit is connected with the sampling end of sample resistance, first amplifying circuit has two amplification voltage signal outputs, the first amplification voltage signal output of first amplifying circuit is connected with the first signal sampling mouth of described micro-control unit, the second amplification voltage signal output of first amplifying circuit is connected with the input of filter circuit, the output of filter circuit is connected with the amplification voltage signal input of second amplifying circuit, and the amplification voltage signal output of second amplifying circuit is connected with the secondary signal thief hatch of described micro-control unit.
In another preferred embodiment of the present utility model, also comprise first amplifying circuit, second amplifying circuit and filter circuit, the voltage signal input of described first amplifying circuit and the input of filter circuit are connected with the sampling end of sample resistance, first amplifying circuit has an amplification voltage signal output, the amplification voltage signal output of first amplifying circuit is connected with the first signal sampling mouth of described micro-control unit, the output of filter circuit is connected with the amplification voltage signal input of second amplifying circuit, and the amplification voltage signal output of second amplifying circuit is connected with the secondary signal thief hatch of described micro-control unit.
In the preferred embodiment of utility model, a double relay can be two single relays or the metal-oxide-semiconductor similar to relay function.
The utility model can be realized the automotive window anti-pinch by ripple and current detecting, and the reliability height, and calculating location is accurate, and cost is low.
Description of drawings
Fig. 1, Fig. 2 are the control flow chart of the disclosed automotive window anti-pinch control circuit that detects based on ripple current of Chinese patent application numbers 200920196866.9.
Fig. 3 is that the utility model is based on the schematic block circuit diagram of the anti-pinching car window control circuit embodiment 1 of ripple and current detecting.
Fig. 4 is that the utility model is based on the schematic block circuit diagram of the anti-pinching car window control circuit embodiment 2 of ripple and current detecting.
The specific embodiment
Prevent from further describing the utility model below in conjunction with accompanying drawing and concrete enforcement.
The motor driving controling circuit that following examples are made of a double relay J is described.Certainly the motor driving controling circuit metal-oxide-semiconductor that also can adopt two single relays or have a relay identical function constitutes.
Referring to Fig. 3, the anti-pinching car window control circuit based on ripple and current detecting that provides among the figure, its circuit comprise motor driving controling circuit 100, power circuit 200, micro-control unit 300, amplifying circuit 400,500 and filter circuit 600.
The sampling end of sample resistance R is connected with the voltage signal input 410 of amplifying circuit 400, amplifying circuit 400 has two amplification voltage signal outputs 420,430, amplification voltage signal output 420 is connected with the signal sampling mouth 330 of micro-control unit 300, amplification voltage signal output 430 is connected with the input 610 of filter circuit 600, the output 620 of filter circuit 600 is connected with the amplification voltage signal input 510 of amplifying circuit 500, and the amplification voltage signal output 520 of amplifying circuit 500 is connected with the signal sampling mouth 340 of micro-control unit 300.
The operating principle of this embodiment is:
Can sample the operating current of automotive window motor 700 by sample resistance R, R is converted to voltage by sample resistance, and current sample voltage is: current sample voltage=current of electric * sampling resistor resistance.
Then with the voltage signal of sampling, through amplifying circuit 400, the scope that the current sample voltage amplification can be measured to micro-control unit is at this moment with the voltage signal separated into two parts of exporting.
A part is wave circuit 600 after filtration, remove direct current component, at this moment can obtain the ripple signal of electric motor of automobile, then the ripple signal is amplified to the scope that micro-control unit 300 can be measured by amplifying circuit 500, ripple signal after will amplifying again is transferred to micro-control unit 300 and handles, algorithm by micro-control unit 300 calculates, and can determine position and the direction of current vehicle window motion.
Another part directly transfers to the signal sampling mouth 330(AD port of micro-control unit 300), calculate running current when front motor by the current sample voltage after measure amplifying, thereby judge whether run into obstruction in the vehicle window running.
Embodiment 2
Referring to Fig. 4, the anti-pinching car window control circuit based on ripple and current detecting that provides among the figure, its circuit comprise motor driving controling circuit 100, power circuit 200, micro-control unit 300, amplifying circuit 400a, 500 and filter circuit 600a.
The sampling end of sample resistance R is told two-way, one the tunnel is connected with the voltage signal input 410a of amplifying circuit 400a, the input 610a of another road filter circuit 600a connects, and the amplification voltage signal output 420a of amplifying circuit 400a is connected with the signal sampling mouth 330 of micro-control unit 300.The output 620a of filter circuit 600a is connected with the amplification voltage signal input 510 of amplifying circuit 500, and the amplification voltage signal output 520 of amplifying circuit 500 is connected with the signal sampling mouth 340 of micro-control unit 300.
The operating principle of this embodiment is:
Can sample the operating current of automotive window motor 700 by sample resistance R, R is converted to voltage by sample resistance, and current sample voltage is: current sample voltage=current of electric * sampling resistor resistance.
Then with the voltage signal of sampling, tell two-way, one tunnel wave circuit 600a after filtration, filtering goes out the ripple signal, then the ripple signal is amplified to the scope that micro-control unit 300 can be measured by amplifying circuit 500, will amplifies back ripple signal again and be transferred to micro-control unit 300.And another road directly is amplified to the scope that micro-control unit 300 can detect with the voltage signal of sampling through amplifying circuit 400a, and is transferred to micro-control unit 300.
Among above-mentioned two embodiment; if in the vehicle window process of rising or falling; when the voltage that records by signal sampling mouth 330 surpasses certain voltage; and by the vehicle window position that the ripple signal detection arrives, in the time of near vehicle window bottom or vehicle window top, illustrate that vehicle window rose to the top or dropped to the end this moment; micro controller unit 300 sends instruction; make motor driving controling circuit 100 disable motor power supplys, vehicle window stops action, thereby has protected Car window electric machine.
If vehicle window is in uphill process the time, when the voltage that records by signal sampling mouth 330 surpasses certain voltage, the vehicle window position of arriving by the ripple signal detection is in the anti-pinch zone time, illustrate that run into obstruction this moment in the vehicle window uphill process, micro controller unit 300 sends instruction, motor driving controling circuit 100 control motors are stopped or the decline certain distance that reverses, thereby realize the automotive window pinch resistant functionality.
Claims (4)
1. based on the anti-pinching car window control circuit of ripple and current detecting, comprise motor driving controling circuit, power circuit, micro-control unit, power circuit is given motor driving controling circuit and micro-control unit power supply; Described motor driving controling circuit comprises two relays, wherein a static contact of first relay static contact and second relay and connect after connect power circuit, the moving contact of the moving contact of first relay and second relay connect respectively the automotive window motor the input anode and the input negative terminal; Another static contact of first relay and another static contact of second relay also connect the back by sample resistance ground connection; Described micro-control unit has two control signal outputs, and wherein the first control signal output and the second control signal output are connected with the control end of the line bag of the line Bao Yiduan of described first relay and second relay respectively; It is characterized in that, described sample resistance is sampled to the operating current of automotive window motor, the current conversion that obtains of sampling is sampled voltage, and described sampled voltage is divided into two-way and sends in the micro-control unit by two signal sampling mouths of micro-control unit and handle; Wherein form the ripple signal of automotive window motor behind one road sampled voltage removal direct current, another road sampled voltage input micro-control unit forms the current running current of automotive window motor.
2. the anti-pinching car window control circuit based on ripple and current detecting as claimed in claim 1, it is characterized in that, also comprise first amplifying circuit, second amplifying circuit and filter circuit, the voltage signal input of described first amplifying circuit is connected with the sampling end of sample resistance, first amplifying circuit has two amplification voltage signal outputs, the first amplification voltage signal output of first amplifying circuit is connected with the first signal sampling mouth of described micro-control unit, the second amplification voltage signal output of first amplifying circuit is connected with the input of filter circuit, the output of filter circuit is connected with the amplification voltage signal input of second amplifying circuit, and the amplification voltage signal output of second amplifying circuit is connected with the secondary signal thief hatch of described micro-control unit.
3. the anti-pinching car window control circuit based on ripple and current detecting as claimed in claim 1, it is characterized in that, also comprise first amplifying circuit, second amplifying circuit and filter circuit, the voltage signal input of described first amplifying circuit and the input of filter circuit are connected with the sampling end of sample resistance, first amplifying circuit has an amplification voltage signal output, the amplification voltage signal output of first amplifying circuit is connected with the first signal sampling mouth of described micro-control unit, the output of filter circuit is connected with the amplification voltage signal input of second amplifying circuit, and the amplification voltage signal output of second amplifying circuit is connected with the secondary signal thief hatch of described micro-control unit.
4. as the described anti-pinching car window control circuit based on ripple and current detecting of each claim of claim 1 to 3, it is characterized in that a double relay is two single relays or the metal-oxide-semiconductor similar to relay function.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN2012204073760U CN203050353U (en) | 2012-08-16 | 2012-08-16 | Car window anti-pinching control circuit based on ripple wave and current detection |
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| Application Number | Priority Date | Filing Date | Title |
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| CN2012204073760U CN203050353U (en) | 2012-08-16 | 2012-08-16 | Car window anti-pinching control circuit based on ripple wave and current detection |
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| CN203050353U true CN203050353U (en) | 2013-07-10 |
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| CN2012204073760U Expired - Lifetime CN203050353U (en) | 2012-08-16 | 2012-08-16 | Car window anti-pinching control circuit based on ripple wave and current detection |
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Cited By (9)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN104155502A (en) * | 2014-08-29 | 2014-11-19 | 北京经纬恒润科技有限公司 | Voltage fluctuation detection method and system |
| CN106703583A (en) * | 2016-12-22 | 2017-05-24 | 广州镭铯电子有限公司 | Anti-pinching control method of power window and locked-rotor control method of motor of power window |
| CN107666269A (en) * | 2017-09-08 | 2018-02-06 | 东方久乐汽车电子（上海）股份有限公司 | A kind of heat protection method based on current sample electric machine controller |
| CN108240150A (en) * | 2016-12-27 | 2018-07-03 | 北汽福田汽车股份有限公司 | The anti-pinch device and vehicle of vehicle window |
| CN109278594A (en) * | 2018-10-24 | 2019-01-29 | 东方久乐汽车电子（上海）股份有限公司 | Electric seat of car anti-clip control method and controller based on current of electric ripple |
| CN111361468A (en) * | 2020-03-25 | 2020-07-03 | 浙江航芯科技有限公司 | Anti-pinch control circuit and method for memory seat of automobile |
| CN112610106A (en) * | 2020-12-15 | 2021-04-06 | 重庆集诚汽车电子有限责任公司 | Automobile window anti-pinch control method adopting corrugated motor as driving motor |
| CN113417533A (en) * | 2021-07-19 | 2021-09-21 | 温州长江汽车电子有限公司 | Ripple anti-pinch circuit of automobile electric window |
| CN113485197A (en) * | 2021-07-22 | 2021-10-08 | 北京经纬恒润科技股份有限公司 | Method, device and system for calibrating current of car door and window |
-
2012
- 2012-08-16 CN CN2012204073760U patent/CN203050353U/en not_active Expired - Lifetime
Cited By (14)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN104155502B (en) * | 2014-08-29 | 2017-01-25 | 北京经纬恒润科技有限公司 | Voltage fluctuation detection method and system |
| CN104155502A (en) * | 2014-08-29 | 2014-11-19 | 北京经纬恒润科技有限公司 | Voltage fluctuation detection method and system |
| CN106703583A (en) * | 2016-12-22 | 2017-05-24 | 广州镭铯电子有限公司 | Anti-pinching control method of power window and locked-rotor control method of motor of power window |
| CN106703583B (en) * | 2016-12-22 | 2018-04-27 | 广州镭铯电子有限公司 | The anti-clip control method of power windows and its stall control method of motor |
| CN108240150A (en) * | 2016-12-27 | 2018-07-03 | 北汽福田汽车股份有限公司 | The anti-pinch device and vehicle of vehicle window |
| CN108240150B (en) * | 2016-12-27 | 2021-06-18 | 北汽福田汽车股份有限公司 | Anti-pinch device of car window and vehicle |
| CN107666269B (en) * | 2017-09-08 | 2021-01-15 | 东方久乐汽车电子（上海）股份有限公司 | Thermal protection method based on current sampling motor controller |
| CN107666269A (en) * | 2017-09-08 | 2018-02-06 | 东方久乐汽车电子（上海）股份有限公司 | A kind of heat protection method based on current sample electric machine controller |
| CN109278594A (en) * | 2018-10-24 | 2019-01-29 | 东方久乐汽车电子（上海）股份有限公司 | Electric seat of car anti-clip control method and controller based on current of electric ripple |
| CN111361468A (en) * | 2020-03-25 | 2020-07-03 | 浙江航芯科技有限公司 | Anti-pinch control circuit and method for memory seat of automobile |
| CN112610106A (en) * | 2020-12-15 | 2021-04-06 | 重庆集诚汽车电子有限责任公司 | Automobile window anti-pinch control method adopting corrugated motor as driving motor |
| CN113417533A (en) * | 2021-07-19 | 2021-09-21 | 温州长江汽车电子有限公司 | Ripple anti-pinch circuit of automobile electric window |
| CN113485197A (en) * | 2021-07-22 | 2021-10-08 | 北京经纬恒润科技股份有限公司 | Method, device and system for calibrating current of car door and window |
| CN113485197B (en) * | 2021-07-22 | 2023-03-28 | 北京经纬恒润科技股份有限公司 | Method, device and system for calibrating current of car door and window |
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Granted publication date: 20130710 |
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