CN104141439A - Anti-pinch detection method for electric car window - Google Patents
Anti-pinch detection method for electric car window Download PDFInfo
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- CN104141439A CN104141439A CN201310170735.4A CN201310170735A CN104141439A CN 104141439 A CN104141439 A CN 104141439A CN 201310170735 A CN201310170735 A CN 201310170735A CN 104141439 A CN104141439 A CN 104141439A
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- power windows
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Abstract
The invention provides an anti-pinch detection method for an electric car window. The anti-pinch detection method includes receiving a first position signal and a second position signal, performing logic operation on the first position signal and the second position signal to generate a composite signal, and controlling a motor to stop or reverse according to the composite signal, wherein the first position signal and the second position signal are synchronously generated when the motor runs, and has a phase difference therebetween. Consequently, resolution of a judgment signal (namely the composite signal) is improved by compositing the two position signals to avoid maloperation so as to meet requirements on anti-pinch strength to realize safe pinching prevention.
Description
Technical field
The present invention relates to a kind of anti-clamping method, particularly relate to a kind of Antipinch detection method of power windows.
Background technology
The vehicle window of early stage vehicle, is provided with wind, while wanting lifting window, shakes thorny rocking handle, can borrow manual mode of operation window lifting.Along with electronic development, the vehicle window on vehicle from manually changing into automatically, consequently makes user only need press direction switch mostly, can make like a cork the electronic rising of vehicle window or decline.
The vehicle of existing volume production all can design anti-pinch mechanism, to avoid power windows because of faulty operation, and when window-glass rises, clips to driver or passenger and serious accident occurs.And US and European has all been formulated rules FMVSS118 and 74/60/EEC, with mandatory provision automatic switch window, must there is the pinch resistant functionality of anti-pinch power below 100N.
Common anti-clipping system belongs to the pressure-sensing mode of contact-type more.In vehicle window uphill process, meet obstructions and cause motor torsional moment to change or when electric current changes, can produce signal output, and this signal is after micro computer is processed, the running that can make emergent control vehicle window CD-ROM drive motor stops or being reverse state again.
Yet this kind of judgment mode be easily because car door precision, adhesive tape are aging, glass deformation equal time environmental factor causes the start of anti-pinch mistake, and cause judgement overlong time because signal resolution degree is not enough, and then cause the anti-pinch power cannot be below the 100N of satisfy regulatory.
Summary of the invention
In one embodiment, the present invention proposes a kind of Antipinch detection method of power windows, comprising: receive a primary importance signal and a second place signal, logical operation primary importance signal and second place signal and stop or reversing to produce a composite signal and to control motor according to composite signal.Wherein, primary importance signal and second place signal be for synchronously to produce when motor running, and have a phase difference between the two.Wherein, phase difference is about 90 degree.
In certain embodiments, controlling step comprises: sequentially calculate adjacent two ripples of composite signal wide poor, the difference calculating is sequentially obtained to a plurality of comparative results and controls motor according to comparative result stopping or reversing with threshold value comparison.Wherein, when comparative result recurs set number of times for the poor situation that is greater than threshold value, cause motor to stop or reversing.
In certain embodiments, control step and also comprise: sequentially obtain a plurality of comparative results with threshold value comparison by each ripple of composite signal is wide, and according to comparative result, control motor and stop or reversing.Wherein, when comparative result is situation that ripple is wider than threshold value while recurring set number of times, cause motor to stop or reversing.
In certain embodiments, logical operation step comprises carries out primary importance signal and the second place signal XOR or with exclusive disjunction, obtains composite signal.
In certain embodiments, the Antipinch detection method of power windows can also comprise: by detecting the turned position of motor, produce primary importance signal and second place signal.Wherein, producing step can comprise: utilize the rotational angle of two detectors detection motors to export respectively primary importance signal and second place signal.
In sum, according to the Antipinch detection method of power windows of the present invention, by synthetic two position signallings, improve the resolution of judgement signal (that is, composite signal), to avoid the generation of misoperation, and then meet the regulation of anti-pinch power, to reach safe anti-pinch.In certain embodiments, according to the Antipinch detection method of power windows of the present invention, more utilize repeatedly judgement further to avoid the generation of misoperation.In certain embodiments, according to the Antipinch detection method of power windows of the present invention, more utilize the wide variation of ripple to judge, further avoid the generation of misoperation.In this, sensor can be Hall element, magnetic encoder or current sensor.
Accompanying drawing explanation
Fig. 1 is the schematic diagram of the control device of power windows according to an embodiment of the invention;
Fig. 2 is the flow chart of the Antipinch detection method of power windows according to an embodiment of the invention;
Fig. 3 is the schematic diagram of an embodiment of signal processing circuit in Fig. 1;
Fig. 4 is the oscillogram of the input/output signal of an embodiment of logical block in Fig. 3;
Fig. 5 is the flow chart of the Antipinch detection method of power windows according to another embodiment of the present invention;
Fig. 6 is according to the flow chart of the Antipinch detection method of the power windows of further embodiment of this invention.
Reference numeral
10: control device 110: drive circuit
130: signal processing circuit 132: logical block
134: monitoring unit 136: counter
150: detector 152: detector
170: switch 20: motor
22: linkage unit 30: power windows
θ: angle Sc: control signal
I: electric current D1: ripple is wide
D2: the wide D3 of ripple: ripple is wide
D4: the wide Sp1 of ripple: primary importance signal
Sp2: second place signal Sp3: composite signal
S41: order about motor running and rise with driving electric vehicle window
S43: utilize the rotational angle of two detectors detection motors to export respectively primary importance signal and second place signal
S45: receive primary importance signal and second place signal
S47: logical operation primary importance signal and second place signal are to produce a composite signal
S49: control motor according to composite signal and stop or reversing
S491: sequentially calculate wide poor of adjacent two ripples of composite signal
S492: by each ripple of composite signal wide sequentially with a threshold value comparison
S492 ': by the difference calculating and threshold value comparison
S494: cumulative number adds 1
S496: cumulative number makes zero
S498: order about motor and stop or reversing
The specific embodiment
Fig. 1 is the schematic diagram of the control device of power windows according to an embodiment of the invention.Fig. 2 is the flow chart of the Antipinch detection method of power windows according to an embodiment of the invention.
With reference to Fig. 1 and Fig. 2, control device 10 is in order to control the running of at least one motor 20, and each motor 20 drives the lifting of a power windows 30.Control device 10 comprises at least one drive circuit 110, a signal processing circuit 130, a plurality of detector 150,152 and at least one switch 170.The corresponding one drive circuit of each motor 20 110, two detectors 150,152 and switches 170.
Drive circuit 110 is electrically connected between signal processing circuit 130 and corresponding motor 20.Detector 150,152 is arranged on corresponding motor 20, and is electrically connected signal processing circuit 130.In this, the setting position of detector 150,152 and the rotating shaft of motor 20 form an angle theta.In one embodiment, this angle theta is about 90 degree.Switch 170 is electrically connected signal processing circuit 130, and as a user interface, for user, controls the lifting of power windows 30.
In certain embodiments, detector 150,152 can be same components.In this, detector 150,152 can be two Hall elements (hall sensor), two magnetic encoders (encoder) or two current sensors (current sensor).
Signal processing circuit 130 is controlled drive circuit 110 and is ordered about motor 20 runnings, with driving electric vehicle window 30(, rises or declines) (step S41).For instance, when user's push switch 170 causes corresponding power windows 30 to rise, signal processing circuit 130 receives controls drive circuit 110 generation forward current I to motor 20 from the controlling signal Sc of switch 170.Motor 20 receives forward current I, and under the driving of forward current I and be rotated in the forward.Now, motor 20 past rising of driving electric vehicle window 30 by linkage unit 22.
When motor 20 running, the anglec of rotation that detector 150,152 detects corresponding motor 20 is exported respectively primary importance signal Sp1 and second place signal Sp2(step S43).In other words, when motor 20 running, corresponding detector 150 can synchronously produce primary importance signal Sp1, and corresponding detector 152 is the synchronous second place signal Sp2 that produces.In this, primary importance signal Sp1 and second place signal Sp2 have a phase difference.In one embodiment, this phase difference is about 90 degree.
Signal processing circuit 130 receives primary importance signal Sp1 and second place signal Sp2(step S45), and learn the moving direction (rise or decline) of power windows 30 and estimate the position of power windows 30 by primary importance signal Sp1 and second place signal Sp2.
In the process rising in power windows 30, signal processing circuit 130 logical operation primary importance signal Sp1 and second place signal Sp2 are to produce a composite signal (step S47).Then, signal processing circuit 130 stops or reversing (step S49) according to composite signal control motor 20.In other words, signal processing circuit 130 judges power windows 30 thing that whether meets with obstruction by analyzing composite signal, and then controls drive circuit 110 and order about motor 20 and stop or reversing.
In one embodiment, with reference to Fig. 3, signal processing circuit 130 can comprise a logical block 132 and a monitoring unit 134.Two inputs of logical block 132 are electrically connected respectively detector 150,152, and monitoring unit 134 is electrically connected between the output and drive circuit 110 of logical block 132.
Logical block 132 receives primary importance signal Sp1 and second place signal Sp2, and logical operation primary importance signal Sp1 and second place signal Sp2.In certain embodiments, logical block 132 can be an XOR gate (XOR gate), so that primary importance signal Sp1 and second place signal Sp2 are carried out to XOR, obtains composite signal Sp3.In certain embodiments, logical block 132 can be together or door (XNOR gate), so that primary importance signal Sp1 and second place signal Sp2 are carried out to same exclusive disjunction, obtains composite signal Sp3.
Take XOR gate as example, collocation is with reference to Fig. 4, when motor 20 is rotated in the forward, detector 150,152 output primary importance signal Sp1 and second place signal Sp2 are to logical block 132, and then logical block 132 produces composite signal Sp3 based on primary importance signal Sp1 and second place signal Sp2.
Monitoring unit 134 determines whether stop motor 20 according to composite signal Sp3 again or makes motor 20 reversions.In this, monitoring unit 134 is analyzed composite signal Sp3 with the variation of observation signal, and in abnormal signal, recurs set number of times and cause motor 20 to shut down or reverse.Wherein, monitoring unit 134 can couple a counter 136, to calculate the frequency of abnormal signal.
In certain embodiments, with reference to Fig. 5, monitoring unit 134 by the wide D1 of each ripple of composite signal, D2, D3, D4 sequentially with a threshold value comparison (step S492), to obtain comparative result separately.When comparative result is ripple while being wider than threshold value, monitoring unit 134 causes the cumulative number of counter 136 to add 1(step S494).When comparative result is when to be that ripple is wide be not more than threshold value, 134 of monitoring units cause the cumulative number of counter 136 to make zero (step S496).
When (cumulative number reaches set number of times, the situation that ripple is wider than threshold value recurs set number of times) time, monitoring unit 134 is controlled drive circuit 110 and is stopped output current I to cause motor 20 to shut down, or controls drive circuit 110 output reversing the current I with CD-ROM drive motor 20 reverse rotations (step S498).
In certain embodiments, with reference to Fig. 6, monitoring unit 134 first sequentially calculate composite signal Sp3 the wide D1 of adjacent two ripple, D2/(or) poor (the step S491) of D2, D3/D3, D4.In this, the difference calculating can absolute value performance.
Monitoring unit 134 again by the difference calculating sequentially with threshold value comparison (step S492 '), to obtain comparative result separately.When comparative result is the difference that calculates while being greater than threshold value, monitoring unit 134 causes the cumulative number of counter 136 to add 1(step S494).When comparative result is the difference that calculates while being not more than threshold value, 134 of monitoring units cause the cumulative number of counter 136 to make zero (step S496).
When (cumulative number reaches set number of times, the situation that ripple is wider than threshold value recurs set number of times) time, monitoring unit 134 is controlled drive circuit 110 and is stopped output current I to cause motor 20 to shut down, or controls drive circuit 110 output reversing the current I with CD-ROM drive motor 20 reverse rotations (step S498).
In certain embodiments, set number of times is preferably 8 times.For instance, when the scope of vehicle voltage value (V) is 9V～16V, the threshold value of the difference that adjacent two ripples are wide is between 10～30, and to recur number of times (that is, set number of times) be 8 times, can reach anti-pinch power (N) and be less than 100N.
In sum, according to the Antipinch detection method of power windows of the present invention, by synthetic two position signallings, improve the resolution of judgement signal (that is, composite signal), to avoid the generation of misoperation, and then meet the regulation of anti-pinch power, to reach safe anti-pinch.In certain embodiments, according to the Antipinch detection method of power windows of the present invention, more utilize repeatedly judgement further to avoid the generation of misoperation.In certain embodiments, according to the Antipinch detection method of power windows of the present invention, more utilize the wide variation of ripple to judge, further avoid the generation of misoperation.
Although the present invention discloses as above with aforesaid embodiment; yet it is not in order to limit the present invention; any personnel that are familiar with correlation technique; without departing from the spirit and scope of the present invention; can do a little change and modification, therefore scope of patent protection of the present invention should be defined and is as the criterion by this manual appending claims.
Claims (10)
1. an Antipinch detection method for power windows, is characterized in that, comprising:
Receive a primary importance signal and a second place signal, wherein this primary importance signal and this second place signal for synchronously producing and having a phase difference when a motor running;
This primary importance signal of logical operation and this second place signal are to produce a composite signal; And
According to this composite signal, controlling this motor stops or reversing.
2. the Antipinch detection method of power windows according to claim 1, is characterized in that, this control step comprises:
Sequentially calculate wide poor of adjacent two ripples of this composite signal;
Those differences that calculate are sequentially obtained to a plurality of comparative results with a threshold value comparison; And
According to those comparative results, controlling this motor stops or reversing.
3. the Antipinch detection method of power windows according to claim 2, is characterized in that, controls that this motor stops or this step of reversing comprises according to those comparative results:
When the situation that is greater than this threshold value when this difference recurs set number of times, cause this motor stop or reversing.
4. the Antipinch detection method of power windows according to claim 1, is characterized in that, this control step comprises:
Sequentially obtain a plurality of comparative results with a threshold value comparison by each ripple of this composite signal is wide; And
According to those comparative results, controlling this motor stops or reversing.
5. the Antipinch detection method of power windows according to claim 4, is characterized in that, controls that this motor stops or this step of reversing comprises according to those comparative results:
When the situation that is wider than this threshold value when this ripple recurs set number of times, cause this motor stop or reversing.
6. according to the Antipinch detection method of the power windows described in any one in claim 1 to 5, it is characterized in that, this logical operation step comprises:
This primary importance signal and this second place signal are carried out to XOR or with exclusive disjunction, obtain this composite signal.
7. according to the Antipinch detection method of the power windows described in any one in claim 1 to 5, it is characterized in that, this phase difference is about 90 degree.
8. according to the Antipinch detection method of the power windows described in any one in claim 1 to 5, it is characterized in that, also comprise:
By detecting the turned position of this motor, produce this primary importance signal and this second place signal.
9. the Antipinch detection method of power windows according to claim 8, is characterized in that, this generation step comprises:
Utilize rotational angle that two detectors detect this motor to export respectively this primary importance signal and this second place signal.
10. the Antipinch detection method of power windows according to claim 9, is characterized in that, those detectors are two Hall elements, two magnetic encoders or two current sensors.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201310170735.4A CN104141439B (en) | 2013-05-10 | 2013-05-10 | The anti-pinch detection method of power windows |
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| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201310170735.4A CN104141439B (en) | 2013-05-10 | 2013-05-10 | The anti-pinch detection method of power windows |
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| Publication Number | Publication Date |
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| CN104141439A true CN104141439A (en) | 2014-11-12 |
| CN104141439B CN104141439B (en) | 2016-06-01 |
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| CN201310170735.4A Expired - Fee Related CN104141439B (en) | 2013-05-10 | 2013-05-10 | The anti-pinch detection method of power windows |
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Cited By (1)
| Publication number | Priority date | Publication date | Assignee | Title |
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| CN106193880A (en) * | 2016-07-29 | 2016-12-07 | 郑州天迈科技股份有限公司 | Motor based on self-studying mode is closed the door finger method and system |
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| CN106193880A (en) * | 2016-07-29 | 2016-12-07 | 郑州天迈科技股份有限公司 | Motor based on self-studying mode is closed the door finger method and system |
| CN106193880B (en) * | 2016-07-29 | 2017-12-15 | 郑州天迈科技股份有限公司 | Motor shutdown finger method and system based on self-studying mode |
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| CN104141439B (en) | 2016-06-01 |
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