CN114482767B - Anti-pinch force detection method and system for ripple anti-pinch car window - Google Patents
Anti-pinch force detection method and system for ripple anti-pinch car window Download PDFInfo
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- CN114482767B CN114482767B CN202111603374.9A CN202111603374A CN114482767B CN 114482767 B CN114482767 B CN 114482767B CN 202111603374 A CN202111603374 A CN 202111603374A CN 114482767 B CN114482767 B CN 114482767B
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- 238000005070 sampling Methods 0.000 claims description 19
- 238000000034 method Methods 0.000 claims description 13
- 230000002265 prevention Effects 0.000 claims description 11
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- 230000000737 periodic effect Effects 0.000 abstract description 3
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- 230000008569 process Effects 0.000 description 6
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Classifications
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- E—FIXED CONSTRUCTIONS
- E05—LOCKS; KEYS; WINDOW OR DOOR FITTINGS; SAFES
- E05F—DEVICES FOR MOVING WINGS INTO OPEN OR CLOSED POSITION; CHECKS FOR WINGS; WING FITTINGS NOT OTHERWISE PROVIDED FOR, CONCERNED WITH THE FUNCTIONING OF THE WING
- E05F15/00—Power-operated mechanisms for wings
- E05F15/60—Power-operated mechanisms for wings using electrical actuators
- E05F15/603—Power-operated mechanisms for wings using electrical actuators using rotary electromotors
- E05F15/665—Power-operated mechanisms for wings using electrical actuators using rotary electromotors for vertically-sliding wings
- E05F15/689—Power-operated mechanisms for wings using electrical actuators using rotary electromotors for vertically-sliding wings specially adapted for vehicle windows
- E05F15/695—Control circuits therefor
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- E—FIXED CONSTRUCTIONS
- E05—LOCKS; KEYS; WINDOW OR DOOR FITTINGS; SAFES
- E05F—DEVICES FOR MOVING WINGS INTO OPEN OR CLOSED POSITION; CHECKS FOR WINGS; WING FITTINGS NOT OTHERWISE PROVIDED FOR, CONCERNED WITH THE FUNCTIONING OF THE WING
- E05F15/00—Power-operated mechanisms for wings
- E05F15/40—Safety devices, e.g. detection of obstructions or end positions
Abstract
The invention provides an anti-pinch force detection method and system for a ripple anti-pinch car window, which relate to the technical field of car window anti-pinch, and comprise the following steps: step S1, after an external window closing instruction is received, continuously capturing the ripple pulse period number of a window driving motor of a corresponding ripple anti-pinch window, and compensating a calibrated ripple period number to obtain a corresponding compensation period number; step S2, judging whether the periods of ripple pulse captured at least twice successively are larger than the corresponding compensation periods: if yes, outputting an anti-pinch force detection signal to drive the window driving motor to control the ripple anti-pinch window to stop closing; if not, returning to the step S1. The anti-pinch force detection device has the beneficial effects that the detection precision of the anti-pinch force of the vehicle window is improved, and the influence of the motor on the anti-pinch force detection due to reasons such as working voltage, working temperature, abrupt change of working load and the like is reduced; the ripple periodic interference caused by the factors of clamping hard objects and the like is effectively avoided, and the integrity of anti-clamping force detection is improved.
Description
Technical Field
The invention relates to the technical field of anti-pinch of vehicle windows, in particular to an anti-pinch force detection method and system for a ripple anti-pinch vehicle window.
Background
The ripple clamping prevention scheme of the power window is more and more valued and favored in the industry because of the relatively simple structure and lower cost, but the clamping prevention precision and reliability are always difficult problems, and the detection precision of the ripple clamping prevention force is the most critical clamping prevention index and is also the most important index for safely evaluating the whole system.
The implementation of the anti-pinch function needs to accurately detect the anti-pinch force, and the traditional ripple anti-pinch force detection mainly judges whether the car window is in anti-pinch action or not by a method of collecting motor current and setting a threshold value for comparison, but in actual work, the working current of the anti-pinch motor is changed severely along with working temperature and working voltage, the anti-pinch function is judged in a traditional threshold value mode, and misoperation of an anti-pinch system can be directly caused. In order to ensure that the anti-pinch system works normally and reliably, ensure the normal closing of the vehicle window, avoid pinching, and accurately calculate and compensate the anti-pinch force of the vehicle window.
Disclosure of Invention
Aiming at the problems in the prior art, the invention provides an anti-pinch force detection method of a ripple anti-pinch car window, which comprises the following steps:
step S1, after an external window closing instruction is received, continuously capturing the ripple pulse period number of a window driving motor of a corresponding ripple anti-pinch window, and compensating a calibrated ripple period number in real time to obtain a corresponding compensation period number;
step S2, determining whether the number of ripple pulse cycles captured at least twice consecutively is greater than the corresponding number of compensation cycles:
if yes, outputting an anti-pinch force detection signal to drive the car window driving motor to control the ripple anti-pinch car window to stop closing;
if not, returning to the step S1.
Preferably, in the step S1, compensating the calibration ripple period number includes:
when capturing the ripple pulse cycle number each time, acquiring the working temperature of the vehicle window driving motor, processing according to the working temperature and a temperature compensation coefficient acquired in advance to obtain a temperature compensation value, and compensating the calibration ripple cycle number according to the temperature compensation value;
and/or
And when capturing the ripple pulse cycle number each time, acquiring the working voltage of the car window driving motor, processing according to the working voltage and a voltage compensation coefficient acquired in advance to obtain a voltage compensation value, and compensating the calibration ripple cycle number according to the voltage compensation value.
Preferably, the calculation formula of the compensation cycle number is as follows:
T compensation period ＝T Calibrating ripple period +T Temperature compensation
Or (b)
T Compensation period ＝T Calibrating ripple period +T Voltage compensation
Or (b)
T Compensation period ＝T Calibrating ripple period +T Temperature compensation +T Voltage compensation
Wherein,
T temperature compensation ＝T t *K t ，T Voltage compensation ＝V*K v
Wherein T is Compensation period Representing the number of compensation cycles, T Calibrating ripple period Representing the number of the nominal ripple periods, T Temperature compensation Representing the temperature compensation value, T Voltage compensation Representing the voltage compensation value, T t Indicating the operating temperature, K t Representing the temperature compensation coefficient, V representing the operating voltage, K v Representing the voltage compensation coefficient.
Preferably, in the step S2, after determining that the number of periods of the ripple pulse captured at least twice in succession is greater than the corresponding number of periods of compensation, the method further includes:
a1, acquiring a sampling current of the window driving motor at the current moment, and processing according to the sampling current and a calibration current acquired in advance to obtain a current safety threshold;
step A2, judging whether the current safety threshold is larger than a set threshold:
if yes, outputting the anti-pinch force detection signal to drive the car window driving motor to control the ripple anti-pinch car window to stop closing;
if not, returning to the step S1.
Preferably, the calculation formula of the current safety threshold is as follows:
wherein S represents the current safety threshold, I represents the sampling current, I Calibrating Representing the nominal current.
The invention also provides an anti-pinch force detection system of the ripple anti-pinch vehicle window, which applies the anti-pinch force detection method, and comprises the following steps:
the cycle compensation module is used for continuously capturing the ripple pulse cycle number of a window driving motor of a corresponding ripple anti-pinch window after receiving an external window closing instruction, and compensating a calibrated ripple cycle number in real time to obtain a corresponding compensation cycle number;
and the anti-pinch judging module is connected with the period compensation module and is used for outputting an anti-pinch force detection signal to drive the window driving motor to control the ripple anti-pinch window to stop closing when judging that the period number of the ripple pulse captured at least twice is larger than the compensation period number.
Preferably, the period compensation module includes:
the first compensation unit is used for acquiring the working temperature of the vehicle window driving motor when capturing the ripple pulse cycle number each time, processing according to the working temperature and a temperature compensation coefficient acquired in advance to obtain a temperature compensation value, and compensating the calibration ripple cycle number according to the temperature compensation value;
and/or
The second compensation unit is used for acquiring the working voltage of the car window driving motor when capturing the ripple pulse cycle number each time, processing the working voltage and a voltage compensation coefficient acquired in advance to obtain a voltage compensation value, and compensating the calibration ripple cycle number according to the voltage compensation value.
Preferably, the calculation formula of the compensation cycle number is as follows:
T compensation period ＝T Calibrating ripple period +T Temperature compensation
Or (b)
T Compensation period ＝T Calibrating ripple period +T Voltage compensation
Or (b)
T Compensation period ＝T Calibrating ripple period +T Temperature compensation +T Voltage compensation
Wherein,
T temperature compensation ＝T t *K t ，T Voltage compensation ＝V*K v
Wherein T is Compensation period Representing the number of compensation cycles, T Calibrating ripple period Representing the number of the nominal ripple periods, T Temperature compensation Representing the temperature compensation value, T Voltage compensation Representing the voltage compensation value, T t Indicating the operating temperature, K t Representing the temperature compensation coefficient, V representing the operating voltage, K v Representing the voltage compensation coefficient.
Preferably, the anti-pinch judging module includes:
the first judging unit is used for outputting an anti-pinch signal when judging that the ripple pulse cycle number captured at least twice continuously is larger than the nominal ripple cycle number;
the second judging unit is connected with the first judging unit and is used for obtaining the sampling current of the window driving motor at the current moment according to the anti-pinch signal, obtaining a current safety threshold value according to the sampling current and a calibration current obtained in advance, and outputting the anti-pinch force detection signal to drive the window driving motor to control the ripple anti-pinch window to stop closing when the current safety threshold value is judged to be larger than a set threshold value.
Preferably, the calculation formula of the current safety threshold is as follows:
wherein S represents the current safety threshold, I represents the sampling current, I Calibrating Representing the nominal current.
The technical scheme has the following advantages or beneficial effects:
1) By compensating the number of the calibrated ripple cycles, the detection precision of the anti-pinch force of the car window is improved, and the influence of the motor on the detection of the anti-pinch force due to reasons such as working voltage, working temperature, abrupt change of working load and the like is reduced;
2) When the ripple pulse cycle number captured at least twice continuously is larger than the calibrated ripple cycle number after compensation, whether the anti-clamping function is started or not is further judged based on the current safety threshold value of the car window driving motor, ripple cycle interference caused by factors such as clamping to hard objects is effectively avoided, the problem that clamping force detection is inaccurate is further solved, and the integrity of clamping force detection is improved.
Drawings
FIG. 1 is a flow chart of a method for detecting pinching prevention force of a ripple pinching prevention vehicle window according to a preferred embodiment of the present invention;
FIG. 2 is a flow chart of determining whether to turn on the anti-pinch function based on the current safety threshold of the window driving motor according to the preferred embodiment of the present invention;
fig. 3 is a schematic structural diagram of an anti-pinching force detection system for a ripple anti-pinching vehicle window according to a preferred embodiment of the present invention.
Detailed Description
The invention will now be described in detail with reference to the drawings and specific examples. The present invention is not limited to the embodiment, and other embodiments may fall within the scope of the present invention as long as they conform to the gist of the present invention.
In a preferred embodiment of the present invention, based on the above-mentioned problems existing in the prior art, there is now provided a method for detecting anti-pinching force of a ripple anti-pinching vehicle window, as shown in fig. 1, comprising:
step S1, after an external window closing instruction is received, continuously capturing the ripple pulse period number of a window driving motor of a corresponding ripple anti-pinch window, and compensating a calibrated ripple period number to obtain a corresponding compensation period number;
step S2, judging whether the periods of ripple pulse captured at least twice successively are larger than the corresponding compensation periods:
if yes, outputting an anti-pinch force detection signal to drive the window driving motor to control the ripple anti-pinch window to stop closing;
if not, returning to the step S1.
Specifically, when an external window closing command is received, the window driving motor can start closing the corresponding ripple anti-pinch window in response to the window closing command. In the window closing process, when the window driving motor works normally, the corresponding ripple pulse cycle number change is gentle, and at the moment, if the ripple pulse cycle number suddenly becomes large, a possible reason is that an obstacle is encountered in the window closing process or a problem occurs in the periodic signal capturing. In order to avoid false start of the anti-pinch function caused by factors such as problems in capturing of the periodic signal, the anti-pinch function can be triggered to be started at the moment when the period number of the ripple pulse is large at least twice, so that the window driving motor can be driven to control the ripple anti-pinch window to stop closing, and preferably, the window driving motor can control the ripple anti-pinch window to stop closing, and then the window is retracted for 150mm so as to remove obstacles.
Further, since the operating characteristics of the window driving motor fluctuate with the operating temperature, the ripple period may be significantly shortened when the voltage rises and the operating temperature rises. In order to more reasonably detect the clamping-preventing force of the clamping-preventing car window, in the technical scheme, before judging whether the number of ripple pulse cycles is larger than the number of calibration ripple cycles, the clamping-preventing force detection method further comprises dynamically compensating the number of calibration ripple cycles according to the working temperature and the working voltage of the car window driving motor, so that the problem of inaccurate clamping-preventing force caused by the change of the working environment of the ripple motor can be avoided, and the clamping-preventing force detection accuracy is provided.
The acquisition process of the calibration ripple cycle number is as follows:
according to the relevant regulatory requirements of European 74/60/EEC and U.S. FMVSSll8, the resistance of 70N is set to a clamping prevention threshold, namely, the pulse period value of the ripple motor corresponding to 70N is calibrated through a load: and driving the window driving motor to work under the load condition of 25 ℃,12V and 70N, sequentially recording a plurality of motor pulse periods in a section of position of normal operation of the window driving motor, and filtering data of the motor pulse periods to obtain the nominal ripple period number. The filtering process comprises the following steps: counting and recording the number of n motor pulse periods, removing the maximum value and the minimum value, and taking the average value of the remaining n-2 motor pulse periods as the nominal ripple period number.
More specifically, in step S1, compensating the calibration ripple period number includes:
when capturing the ripple pulse cycle number each time, acquiring the working temperature of the vehicle window driving motor, processing according to the working temperature and a temperature compensation coefficient acquired in advance to obtain a temperature compensation value, and compensating the calibration ripple cycle number according to the temperature compensation value;
and/or
And when capturing the ripple pulse cycle number each time, acquiring the working voltage of the car window driving motor, processing according to the working voltage and a voltage compensation coefficient acquired in advance to obtain a voltage compensation value, and compensating the calibration ripple cycle number according to the voltage compensation value.
Specifically, in this embodiment, it is preferable to count the pulse periods of the ripple motor at different operating temperatures under the load of 70N and the voltage of 12V, for example, count the pulse periods of the ripple motor at the operating temperature of-5 ℃, 0 ℃, 10 ℃, 20 ℃, 30 ℃, 40 ℃ and 50 ℃ respectively, and further analyze and obtain the linear relationship between the pulse periods of the ripple motor and the operating temperature of the motor, and the linear relationship is expressed by the temperature compensation coefficient, that is, the obtained temperature compensation coefficient. It will be appreciated that the different operating temperatures may be other temperature values, and are not limited herein. Preferably, the working temperature of the window driving motor can be acquired through a temperature sensor, specifically, a voltage signal output by the temperature sensor is acquired, and the working temperature corresponding to the voltage signal output by the temperature sensor is matched to the working temperature of the window driving motor in a mode of inquiring a pre-configured voltage-temperature meter containing the corresponding relation between the voltage signal and the working temperature.
Similarly, it is preferable to count the pulse periods of the ripple motor at 70N load and at 25 ℃ working temperature, for example, to count the pulse periods of the ripple motor at 9V, 10V, 11V, 12V, 13V and 14V, respectively, and further analyze the linear relationship between the pulse periods of the ripple motor and the working voltage of the motor, and the linear relationship is represented by a voltage compensation coefficient, i.e. a voltage compensation coefficient is obtained.
In a preferred embodiment of the present invention, only the number of calibration ripple cycles may be temperature-compensated, or only the number of calibration ripple cycles may be voltage-compensated, or both the number of calibration ripple cycles may be temperature-compensated and voltage-compensated, according to the requirement, and the calculation formula of the corresponding compensation cycle number is as follows:
T compensation period ＝T Calibrating ripple period +T Temperature compensation
Or (b)
T Compensation period ＝T Calibrating ripple period +T Voltage compensation
Or (b)
T Compensation period ＝T Calibrating ripple period +T Temperature compensation +T Voltage compensation
Wherein,
T temperature compensation ＝T t *K t ，T Voltage compensation ＝V*K v
Wherein T is Compensation period Representing the number of compensation cycles, T Calibrating ripple period Represents the nominal ripple cycle number, T Temperature compensation Representing the temperature compensation value, T Voltage compensation Representing the voltage compensation value, T t Indicating the working temperature, K t Represents the temperature compensation coefficient, V represents the operating voltage, K v Representing the voltage compensation coefficient.
In a preferred embodiment of the present invention, the number of ripple pulse cycles can reflect the detected anti-pinch force to some extent, but if the detected anti-pinch force is hard, ripple anti-pinch pulses may not appear twice consecutively, which affects normal opening of the anti-pinch function, and based on this, in step S2, after determining that the number of ripple pulse cycles captured at least twice consecutively is larger than the corresponding number of compensation cycles, as shown in fig. 2, the method further includes:
step A1, acquiring a sampling current of a window driving motor at the current moment, and processing according to the sampling current and a calibration current acquired in advance to obtain a current safety threshold;
step A2, judging whether the current safety threshold is larger than a set threshold:
if so, outputting an anti-pinch force detection signal to drive a car window driving motor to control the ripple anti-pinch car window to stop closing;
if not, returning to the step S1.
Specifically, in this embodiment, on the basis that the number of ripple pulse periods captured at least twice continuously is larger than the corresponding number of compensation periods, a certain compensation is performed on the anti-pinch pulse according to the dynamically collected sampling current, so that the problem of inaccurate anti-pinch force detection caused by interference of the ripple periods can be avoided, and the integrity of anti-pinch force detection is improved.
In a preferred embodiment of the present invention, the calculation formula of the current safety threshold is as follows:
wherein S represents a current safety threshold, I represents a sampling current, I Calibrating Indicating the calibration current.
The invention also provides an anti-pinch force detection system of the ripple anti-pinch vehicle window, which applies the anti-pinch force detection method, as shown in fig. 3, and comprises the following steps:
the cycle compensation module 1 is used for continuously capturing the ripple pulse cycle number of a window driving motor of a corresponding ripple anti-pinch window after receiving an external window closing instruction, and compensating a calibrated ripple cycle number in real time to obtain a corresponding compensation cycle number;
the anti-pinch judging module 2 is connected with the period compensating module 1 and is used for outputting an anti-pinch force detecting signal when judging that the period number of the ripple pulse captured at least twice is larger than the compensation period number so as to drive the car window driving motor to control the ripple anti-pinch car window to stop closing.
In a preferred embodiment of the present invention, the period compensation module 1 includes:
the first compensation unit 11 is configured to acquire an operating temperature of the window driving motor when capturing the number of ripple pulse periods each time, process to obtain a temperature compensation value according to the operating temperature and a temperature compensation coefficient acquired in advance, and compensate the number of nominal ripple periods according to the temperature compensation value;
and/or
The second compensation unit 12 is configured to acquire an operating voltage of the window driving motor each time a number of ripple pulse cycles is captured, process the operating voltage and a voltage compensation coefficient acquired in advance to obtain a voltage compensation value, and compensate the number of nominal ripple cycles according to the voltage compensation value.
In a preferred embodiment of the present invention, the calculation formula of the compensation cycle number is as follows:
T compensation period ＝T Calibrating ripple period +T Temperature compensation
Or (b)
T Compensation period ＝T Calibrating ripple period +T Voltage compensation
Or (b)
T Compensation period ＝T Calibrating ripple period +T Temperature compensation +T Voltage compensation
Wherein,
T temperature compensation ＝T t *K t ，T Voltage compensation ＝V*K v
Wherein T is Compensation period Representing the number of compensation cycles, T Calibrating ripple period Represents the nominal ripple cycle number, T Temperature compensation Representing the temperature compensation value, T Voltage compensation Representing the voltage compensation value, T t Indicating the working temperature, K t Represents the temperature compensation coefficient, V represents the operating voltage, K v Representing the voltage compensation coefficient.
In a preferred embodiment of the present invention, the 2 anti-pinch judging module includes:
a first judging unit 21 for outputting an anti-pinch signal when judging that the number of ripple pulse cycles captured at least two times in succession is larger than the number of compensation cycles;
the second judging unit 22 is connected to the first judging unit 21, and is configured to obtain a sampling current of the window driving motor at a current moment according to the anti-pinching signal, obtain a current safety threshold according to the sampling current and a calibration current obtained in advance, and output an anti-pinching force detection signal to drive the window driving motor to control the ripple anti-pinching window to stop closing when the current safety threshold is determined to be greater than a set threshold.
In a preferred embodiment of the present invention, the calculation formula of the current safety threshold is as follows:
wherein S represents a current safety threshold, I represents a sampling current, I Calibrating Indicating the calibration current.
The foregoing description is only illustrative of the preferred embodiments of the present invention and is not to be construed as limiting the scope of the invention, and it will be appreciated by those skilled in the art that equivalent substitutions and obvious variations may be made using the description and drawings, and are intended to be included within the scope of the present invention.
Claims (6)
1. The method for detecting the clamping-preventing force of the ripple clamping-preventing car window is characterized by comprising the following steps of:
step S1, after an external window closing instruction is received, continuously capturing the ripple pulse period number of a window driving motor of a corresponding ripple anti-pinch window, and compensating a calibrated ripple period number in real time to obtain a corresponding compensation period number;
step S2, determining whether the number of ripple pulse cycles captured at least twice consecutively is greater than the corresponding number of compensation cycles:
if yes, outputting an anti-pinch force detection signal to drive the car window driving motor to control the ripple anti-pinch car window to stop closing;
if not, returning to the step S1;
in the step S1, the compensating the calibration ripple period number includes:
when capturing the ripple pulse cycle number each time, acquiring the working temperature of the vehicle window driving motor, processing according to the working temperature and a temperature compensation coefficient acquired in advance to obtain a temperature compensation value, and compensating the calibration ripple cycle number according to the temperature compensation value;
and/or
When capturing the ripple pulse cycle number each time, acquiring the working voltage of the vehicle window driving motor, processing according to the working voltage and a voltage compensation coefficient acquired in advance to obtain a voltage compensation value, and compensating the calibration ripple cycle number according to the voltage compensation value;
in the step S2, after determining that the number of ripple pulse periods captured at least two times in succession is greater than the corresponding number of compensation periods, the method further includes:
a1, acquiring a sampling current of the window driving motor at the current moment, and processing according to the sampling current and a calibration current acquired in advance to obtain a current safety threshold;
step A2, judging whether the current safety threshold is larger than a set threshold:
if yes, outputting the anti-pinch force detection signal to drive the car window driving motor to control the ripple anti-pinch car window to stop closing;
if not, returning to the step S1.
2. The pinch resistance detection method according to claim 1, wherein the calculation formula of the compensation cycle number is as follows:
T compensation period ＝T Calibrating ripple period +T Temperature compensation
Or (b)
T Compensation period ＝T Calibrating ripple period +T Voltage compensation
Or (b)
T Compensation period ＝T Calibrating ripple period +T Temperature compensation +T Voltage compensation
Wherein,
T temperature compensation ＝T t *K t ，T Voltage compensation ＝V*K v
Wherein T is Compensation period Representing the number of compensation cycles, T Calibrating ripple period Representing the number of the nominal ripple periods, T Temperature compensation Representing the temperature compensation value, T Voltage compensation Representing the voltage compensation value, T t Indicating the operating temperature, K t Representing the temperature compensation coefficient, V representing the operating voltage, K v Representing the voltage compensation coefficient.
3. The pinch-proof force detection method according to claim 1, wherein the calculation formula of the current safety threshold value is as follows:
wherein S represents the current safety threshold, I represents the sampling current, I Calibrating Representing the nominal current.
4. A pinching prevention force detection system for a ripple pinching prevention vehicle window, wherein the pinching prevention force detection method according to any one of claims 1 to 3 is applied, the pinching prevention force detection system comprising:
the cycle compensation module is used for continuously capturing the ripple pulse cycle number of a window driving motor of a corresponding ripple anti-pinch window after receiving an external window closing instruction, and compensating a calibrated ripple cycle number in real time to obtain a corresponding compensation cycle number;
the anti-pinch judging module is connected with the period compensation module and is used for outputting an anti-pinch force detection signal to drive the window driving motor to control the ripple anti-pinch window to stop closing when judging that the period number of the ripple pulse captured at least twice is larger than the compensation period number;
the period compensation module includes:
the first compensation unit is used for acquiring the working temperature of the vehicle window driving motor when capturing the ripple pulse cycle number each time, processing according to the working temperature and a temperature compensation coefficient acquired in advance to obtain a temperature compensation value, and compensating the calibration ripple cycle number according to the temperature compensation value;
and/or
The second compensation unit is used for acquiring the working voltage of the vehicle window driving motor when capturing the ripple pulse cycle number each time, processing the working voltage and a voltage compensation coefficient acquired in advance to obtain a voltage compensation value, and compensating the calibration ripple cycle number according to the voltage compensation value;
the anti-pinch judging module comprises:
the first judging unit is used for outputting an anti-pinch signal when judging that the cycle number of the ripple pulse captured at least twice continuously is larger than the compensation cycle number;
the second judging unit is connected with the first judging unit and is used for obtaining the sampling current of the window driving motor at the current moment according to the anti-pinch signal, obtaining a current safety threshold value according to the sampling current and a calibration current obtained in advance, and outputting the anti-pinch force detection signal to drive the window driving motor to control the ripple anti-pinch window to stop closing when the current safety threshold value is judged to be larger than a set threshold value.
5. The anti-pinch force detection system of claim 4, wherein the number of compensation cycles is calculated as:
T compensation period ＝T Calibrating ripple period +T Temperature compensation
Or (b)
T Compensation period ＝T Calibrating ripple period +T Voltage compensation
Or (b)
T Compensation period ＝T Calibrating ripple period +T Temperature compensation +T Voltage compensation
Wherein,
T temperature compensation ＝T t *K t ，T Voltage compensation ＝V*K v
Wherein T is Compensation period Representing the number of compensation cycles, T Calibrating ripple period Representing the number of the nominal ripple periods, T Temperature compensation Representing the temperature compensation value, T Voltage compensation Representing the voltage compensation value, T t Indicating the operating temperature, K t Representing the temperature compensation coefficient, V representing the operating voltage, K v Representing the voltage compensation coefficient.
6. The pinch resistance detection system of claim 4, wherein the current safety threshold is calculated as:
wherein S represents the current safety threshold, I represents the sampling current, I Calibrating Representing the nominal current.
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| CN112761455A (en) * | 2020-12-17 | 2021-05-07 | 苏州琪埔维半导体有限公司 | Position compensation system and method for anti-pinch vehicle window based on ripples |
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