CN114776173A

CN114776173A - Anti-pinch control circuit and method for lifting vehicle window motor

Info

Publication number: CN114776173A
Application number: CN202210463066.9A
Authority: CN
Inventors: 李亚东; 潘朝晖; 刘召雄; 谭钦文
Original assignee: Dongfeng Nissan Passenger Vehicle Co
Current assignee: Dongfeng Nissan Passenger Vehicle Co
Priority date: 2022-04-27
Filing date: 2022-04-27
Publication date: 2022-07-22
Anticipated expiration: 2042-04-27
Also published as: CN114776173B

Abstract

The invention discloses an anti-pinch control circuit and method for a lifting car window motor. The method comprises the following steps: the main control unit, the driving unit and the lifting controller are connected in sequence; the switching circuit is positioned between the descending signal output end of the ascending and descending controller and the ascending and descending window motor, and the input end of the switching circuit is connected with the driving unit; when the main control unit determines that the anti-pinch action needs to be executed and detects that the restorable fuse is disconnected, an anti-pinch intention signal is output to the driving unit, so that the driving unit outputs a first control signal to the lifting controller and outputs a second control signal to the switching circuit; the lifting controller is used for attracting the falling signal output end so that the falling signal output end outputs a falling control signal; and the switching circuit is switched on, and the descending control signal is output to the window lifting motor. Through the mode, when the restorable fuse is disconnected, the falling control signal can still be output to the lifting window motor, and the phenomenon that the anti-pinch reverse function fails due to the fact that the lifting window motor stops moving under the heat protection condition is avoided.

Description

Anti-pinch control circuit and method for lifting car window motor

Technical Field

The invention relates to the technical field of automobiles, in particular to an anti-pinch control circuit and method for a lifting window motor.

Background

The window goes up and down as customer's high frequency service function, need carry out the thermal protection design and avoid the motor to operate for a long time and produce the accumulative heat, lead to the hardware to damage or produce potential safety hazards such as smoking on fire. At present, the hardware thermal protection scheme of the motor is that a recoverable fuse (PTC) is added in the motor, if the PTC is disconnected when the motor is triggered to prevent clamping or in the anti-clamping process, an Electronic Control Unit (ECU) can not control the motor to actuate, so that the window is always in a state of clamping foreign matters or the reversing amount is insufficient, and the complete anti-clamping reversing function can not be realized.

The above is only for the purpose of assisting understanding of the technical aspects of the present invention, and does not represent an admission that the above is prior art.

Disclosure of Invention

The invention mainly aims to provide an anti-pinch control circuit and an anti-pinch control method for a lifting car window motor, and aims to solve the technical problem that anti-pinch reversion of a car window cannot be realized when a restorable fuse is disconnected in the current hardware thermal protection design.

In order to achieve the purpose, the invention provides an anti-pinch control circuit of a lifting window motor, which comprises:

the main control unit, the driving unit and the lifting controller are connected in sequence;

the switching circuit is positioned between the descending signal output end of the ascending and descending controller and the ascending and descending window motor, and the input end of the switching circuit is connected with the driving unit;

the main control unit is used for outputting an anti-pinch intention signal to the driving unit when the anti-pinch action is determined to be executed and the restorable fuse in the switch circuit is detected to be disconnected;

the driving unit is used for generating a first control signal and a second control signal according to the anti-pinch intention signal, outputting the first control signal to the lifting controller and outputting the second control signal to the switch circuit;

the lifting controller is used for attracting the falling signal output end according to the first control signal so as to enable the falling signal output end to output a falling control signal;

and the switch circuit is used for conducting according to the second control signal and outputting the descending control signal to the lifting window motor.

Optionally, the power window circuit further comprises: a rising signal detection circuit and a falling signal detection circuit;

the input end of the rising signal detection circuit is connected with a rising signal acquisition point, the rising signal acquisition point is positioned on a rising signal line between the rising signal output end of the rising and falling controller and the lifting window motor, and the output end of the rising signal detection circuit is connected with the main control unit;

the input end of the descending signal detection circuit is connected with a descending signal acquisition point, the descending signal acquisition point is positioned on a descending signal line between the switch circuit and the lifting window motor, and the output end of the descending signal detection circuit is connected with the main control unit.

In addition, in order to achieve the above object, the present invention further provides an anti-pinch control method for a lift window motor, the anti-pinch control method for a lift window motor is applied to an anti-pinch control circuit for a lift window motor, and the anti-pinch control method for a lift window motor comprises:

the main control unit outputs an anti-pinch intention signal to the driving unit when determining that anti-pinch action needs to be executed and detecting that a restorable fuse in the switch circuit is opened;

the driving unit generates a first control signal and a second control signal according to the anti-pinch intention signal, outputs the first control signal to a lifting controller, and outputs the second control signal to a switch circuit;

the lifting controller is used for attracting a falling signal output end according to the first control signal so as to enable the falling signal output end to output a falling control signal;

and the switching circuit is conducted according to the second control signal and outputs the descending control signal to the window lifting motor.

Optionally, the method further comprises:

the main control unit receives a drop end detection signal through a drop signal detection circuit in the anti-pinch action execution process, and judges that the anti-pinch action execution process is achieved after the drop end detection signal is detected to be changed, a restorable fuse in the switch circuit is disconnected, and the step of outputting an anti-pinch intention signal to the driving unit is performed.

Optionally, before the main control unit outputs the anti-pinch intention signal to the driving unit when it is determined that the anti-pinch action needs to be performed and when the recoverable fuse in the switch circuit is detected to be opened, the method further includes:

after the main control unit determines that anti-pinch action needs to be executed, a rising signal detection circuit receives a rising detection signal, a falling signal detection circuit receives a falling detection signal, and whether the restorable fuse is disconnected or not is detected according to the rising detection signal and the falling detection signal.

Optionally, after determining that an anti-pinch action needs to be performed, the main control unit receives a rising detection signal through a rising signal detection circuit, receives a falling detection signal through a falling signal detection circuit, and detects whether the resettable fuse is disconnected according to the rising detection signal and the falling detection signal, including:

after the main control unit determines that anti-pinch action needs to be executed, a descending intention signal is output to the driving unit, so that the driving unit drives the lifting controller to suck the descending signal output end according to the descending intention signal;

receiving a first detection signal by a rising signal detection circuit and a second detection signal by a falling signal detection circuit;

when the lifting window motor is determined not to execute a descending action according to the first detection signal and the second detection signal, outputting a rising intention signal to the driving unit so that the driving unit drives the lifting controller to suck a rising signal output end according to the rising intention signal;

and receiving a rising detection signal through a rising signal detection circuit, receiving a falling detection signal through a falling signal detection circuit, and detecting whether the recoverable fuse is disconnected or not according to the rising detection signal and the falling detection signal.

Optionally, when detecting that the rising detection signal changes with respect to the first detection signal and the falling detection signal changes with respect to the second detection signal, the main control unit determines that the recoverable fuse is turned off.

Optionally, after receiving the rising detection signal by the rising signal detection circuit and receiving the falling detection signal by the falling signal detection circuit, the method further includes:

when the rising detection signal is detected not to generate signal change relative to the first detection signal or the falling detection signal is detected not to generate signal change relative to the second detection signal, judging that a falling signal output end of the rising controller cannot be attracted;

after the receiving the first detection signal by the rising signal detection circuit and the receiving the second detection signal by the falling signal detection circuit, the method further comprises:

when the first detection signal is detected to be high level and the second detection signal is detected to be low level, judging that the rising signal output end of the lifting controller is adhered and the falling signal output end of the lifting controller can not be attracted;

and when the first detection signal and the second detection signal are both high level, judging that the rising signal output end of the lifting controller is stuck and the recoverable fuse is disconnected.

Optionally, the method further comprises:

when detecting that the ascending signal output end of the ascending and descending controller is adhered, the main control unit outputs a descending intention signal to the driving unit so that the driving unit drives the ascending and descending controller to suck the descending signal output end according to the descending intention signal;

when detecting that the switch ascending signal is continuously effective and determining that the anti-pinch action is not required to be executed, stopping outputting the descending intention signal so that the window glass is driven by the window ascending and descending motor to ascend to the top end;

when the vehicle window glass is detected to rise to the top end, a falling intention signal is output to the driving unit, so that the driving unit drives the lifting controller to suck the falling signal output end according to the falling intention signal.

Optionally, the method further comprises:

when the main control unit detects a switch rising signal, the main control unit outputs a rising intention signal to the driving unit, so that the driving unit drives the rising controller to suck a rising signal output end according to the rising intention signal, receives a third detection signal through a rising signal detection circuit, and receives a fourth detection signal through a falling signal detection circuit;

when the third detection signal is detected to be at a low level, judging that the rising signal output end of the lifting controller cannot be attracted;

when the third detection signal and the fourth detection signal are both detected to be in a high level, stopping outputting the rising intention signal, receiving a fifth detection signal through the rising signal detection circuit, and receiving a sixth detection signal through the falling signal detection circuit;

when the fifth detection signal is detected to be at a high level or the sixth detection signal is detected to be at a high level, judging that the descending signal output end of the lifting controller is adhered, and continuously outputting a lifting intention signal to the driving unit so that the driving unit drives the lifting controller to suck the ascending signal output end according to the lifting intention signal;

and when the fifth detection signal is detected to be low level and the sixth detection signal is detected to be low level, judging that the recoverable fuse is switched off.

The anti-pinch control circuit of the lifting window motor comprises: the main control unit, the driving unit and the lifting controller are connected in sequence; the switching circuit is positioned between the descending signal output end of the ascending and descending controller and the ascending and descending window motor, and the input end of the switching circuit is connected with the driving unit; the main control unit outputs an anti-pinch intention signal to the driving unit when determining that anti-pinch action needs to be executed and detecting that a restorable fuse in the switch circuit is opened; the driving unit generates a first control signal and a second control signal according to the anti-pinch intention signal, outputs the first control signal to the lifting controller and outputs the second control signal to the switching circuit; the lifting controller is used for attracting the falling signal output end according to the first control signal so as to enable the falling signal output end to output a falling control signal; and the switching circuit is conducted according to the second control signal and outputs the descending control signal to the window lifting motor. In this way, when the recoverable fuse breaks, the control switch circuit switches on, and output decline control signal to lift window motor has realized lift window motor's the function of preventing pressing from both sides reversal, has avoided lift window motor thermal protection to stop actuating and has leaded to preventing pressing from both sides the function inefficacy of reversal.

Drawings

FIG. 1 is a schematic circuit diagram of a first embodiment of an anti-pinch control circuit for a lift window motor of the present invention;

FIG. 2 is a schematic diagram of a lift controller of an anti-pinch control circuit of a lift window motor according to an embodiment of the present invention;

FIG. 3 is a schematic diagram of a switch circuit of an anti-pinch control circuit of a window motor according to an embodiment of the present invention;

FIG. 4 is a schematic circuit diagram of a second embodiment of an anti-pinch control circuit for a window lift motor of the present invention;

FIG. 5 is a schematic diagram of a detection circuit of an anti-pinch control circuit of the window motor for lifting and lowering the window of the present invention;

FIG. 6 is a schematic flow chart illustrating a first embodiment of a pinch-proof control method for a window motor;

FIG. 7 is a flowchart illustrating a method for anti-pinch control of a window lift motor according to a second embodiment of the present invention.

The implementation, functional features and advantages of the objects of the present invention will be further explained with reference to the accompanying drawings.

Detailed Description

It should be understood that the specific embodiments described herein are merely illustrative of the invention and are not intended to limit the invention.

The embodiment of the invention provides an anti-pinch control circuit of a lifting window motor, and referring to fig. 1, fig. 1 is a circuit structure schematic diagram of a first embodiment of the anti-pinch control circuit of the lifting window motor.

In this embodiment, lift window motor's anti-pinch control circuit includes:

a main control unit 10, a driving unit 20 and a lifting controller 30 which are connected in sequence;

a switch circuit 40, wherein the switch circuit 40 is located between the descending signal output end of the ascending and descending controller 30 and the ascending and descending window motor, and the input end of the switch circuit 40 is connected with the driving unit 20;

the main control unit 10 is configured to output an anti-pinch intention signal to the driving unit 20 when it is determined that an anti-pinch action needs to be performed and the switch circuit 40 is detected that a recoverable fuse is opened.

It can be understood that the anti-pinch control circuit of the window lifting motor of the embodiment is arranged in an Electronic Control Unit (ECU). The main control unit 10 is provided with an internal signal Ap _ action, and when the anti-pinch operation is not required to be executed, Ap _ action is set to 0, and when the anti-pinch operation is detected to be required, Ap _ action is set to 1. Optionally, a hall sensor for detecting the rotation speed of the window lifter motor is arranged in this embodiment, when the hall sensor detects that the rotation speed changes, information is transmitted to the ECU, and when the main control unit 10 receives the information fed back by the hall sensor, it is determined that an anti-pinch action needs to be performed, and Ap _ action is set to 1; optionally, an anti-pinch module is arranged to detect resistance in the glass lifting process, when the resistance is greater than a certain value, information is transmitted to the ECU, and when receiving the information fed back by the anti-pinch module, the main control unit 10 determines that an anti-pinch action needs to be executed, and sets Ap _ action to 1.

It should be noted that the resettable fuse is turned off when the temperature is detected to reach a certain value, and is turned on again after cooling. Optionally, a resettable fuse detection line is provided for detecting whether the resettable fuse is open. In a specific implementation, if the recoverable fuse is not disconnected, the recoverable fuse is directly connected to the descending signal output end of the ascending and descending controller 30 and the ascending and descending window motor, and a descending control signal is output to the ascending and descending window motor, so that the ascending and descending window motor controls the window to descend.

It should be understood that, in the present embodiment, the main control unit 10 is further provided with an anti-pinch intention signal i _ ap in addition to the rising intention signal i _ up and the falling intention signal i _ down, and outputs i _ ap to 1 when it is determined that the anti-pinch action needs to be performed and the restorable fuse is detected to be opened, or outputs i _ ap to 0 otherwise to the driving unit 20. In a specific implementation, the lifting intention signal output by the main control unit 10 to the driving unit 20 includes three types: rising i _ up ═ 1& i _ down ═ 0; decreasing i _ up to 0& i _ down to 1; the window does not operate i _ up is 0& i _ down is 0.

The driving unit 20 is configured to generate a first control signal and a second control signal according to the anti-pinch intention signal, output the first control signal to the lifting controller 30, and output the second control signal to the switching circuit 40.

When receiving the anti-pinch intention signal, the driving unit 20 generates the first control signal i _ up _ 0& i _ down _ out _ 1 and the second control signal i _ ap _ out _ 1. The driving unit 20 in the present embodiment is provided with an i _ ap _ out signal for controlling the switching circuit 40, in addition to the rising control signal i _ up _ out and the falling control signal i _ down _ out. The i _ up _ 0& i _ down _ out _ 1 is output to the up/down controller 30, and the i _ ap _ out _ 1 is output to the switching circuit 40. In a specific implementation, the driving unit 20 outputs three kinds of lift control signals to the lift controller 30: up i _ up _ out 1& i _ down _ out 0; down i _ up _ out is 0& i _ down _ out is 1; the window does not actuate i _ up _ out is 0& i _ down _ out is 0.

The lifting controller 30 is configured to pull in the falling signal output end according to the first control signal, so that the falling signal output end outputs a falling control signal.

It should be understood that the up-down controller 30 pulls the down signal output terminal, specifically, controls the ACC power line to be connected with the down signal output terminal upon receiving i _ down _ out of 1, thereby outputting the down control signal.

Preferably, the lifting controller 30 of the present embodiment is a relay, referring to fig. 2, fig. 2 is a schematic diagram of the lifting controller 30 of an embodiment of an anti-pinch control circuit of a lift window motor of the present invention; the driving unit 20 is connected to the rising signal input terminal and the falling signal input terminal of the rising and falling controller 30, the initial rising signal output terminal and the initial falling signal output terminal are both grounded, and when the driving unit 20 outputs i _ up _ out equal to 1 to the rising signal input terminal of the rising and falling controller 30, the rising controller 30 attracts the rising signal output terminal, so that the ACC power line is connected to the rising signal output terminal, and a rising control signal is output to the window motor. When the driving unit 20 outputs i _ down _ out equal to 1 to the falling signal input terminal of the rising and falling controller 30, the rising and falling controller 30 attracts the falling signal output terminal, so that the ACC power line is connected to the falling signal output terminal, and outputs a falling control signal to the window lifting motor.

And the switch circuit 40 is used for conducting according to the second control signal and outputting the descending control signal to the lifting window motor.

It will be appreciated that the switching circuit 40 switches on the down signal output of the lift controller 30 and the lift window motor under the control of the second control signal, outputting a down control signal to the lift window motor, so that the lift window motor controls the window to be lowered. In a specific implementation, the main control unit 10 is further provided with an internal signal Ap _ action _ f for determining whether the anti-pinch action has been performed, and after the anti-pinch action has been completed, the main control unit sets i _ up to 0& i _ down to 0, i _ up _ out to 0& i _ down _ out to 0, and controls the window to be inactive. Optionally, the main control unit 10 determines the rotation speed of the motor through information transmitted by the hall sensor, determines the descending distance through the rotation speed of the motor and the descending time, controls the window lifting motor to stop reversing when the descending distance reaches a preset safe distance, and sets Ap _ action _ f to be 1.

It should be noted that the switching circuit 40 includes a recoverable fuse and a transistor connected in parallel; a first end of the recoverable fuse is connected with a descending signal output end of the ascending and descending controller 30, and a second end of the recoverable fuse is connected with a second end of the ascending and descending window motor; the base of the triode is connected with the driving unit 20, the emitter of the triode is connected with the descending signal output end of the ascending and descending controller 30, and the collector of the triode is connected with the second end of the ascending and descending window motor. After the recoverable fuse is cut off, if the base of the triode receives the second control signal of the driving unit 20, the emitter and the collector are conducted, so that the falling signal output end of the lifting controller 30 and the lifting window motor are conducted.

Optionally, referring to fig. 3, fig. 3 is a schematic diagram of a switch circuit 40 of an embodiment of an anti-pinch control circuit of a lift window motor of the present invention; fig. 3 is a schematic diagram, and the specific switch circuit 40 can be designed according to actual situations. After receiving the second control signal from the driving unit 20, the transistor 1 in fig. 3 switches on the terminals a and B, so that the falling signal output terminal of the lifting controller 30 and the window lift motor are switched on.

The anti-pinch control circuit of the lifting window motor of the embodiment comprises: a main control unit 10, a driving unit 20 and a lifting controller 30 connected in sequence; the switch circuit 40 is positioned between the descending signal output end of the ascending and descending controller 30 and the ascending and descending window motor, and the input end of the switch circuit 40 is connected with the driving unit 20; when determining that the anti-pinch action needs to be executed and detecting that a restorable fuse in the switch circuit 40 is disconnected, the main control unit 10 outputs an anti-pinch intention signal to the driving unit 20; the driving unit 20 generates a first control signal and a second control signal according to the anti-pinch intention signal, outputs the first control signal to the lifting controller 30, and outputs the second control signal to the switching circuit 40; the lifting controller 30 actuates the falling signal output terminal according to the first control signal to make the falling signal output terminal output a falling control signal; the switching circuit 40 is turned on according to the second control signal, and outputs a down control signal to the window up-down motor. In this way, when the restorable fuse is disconnected, the control switch circuit 40 is switched on and outputs a descending control signal to the lifting window motor, so that the anti-pinch reverse function of the lifting window motor is realized, and the failure of the anti-pinch reverse function caused by the stop of the thermal protection of the lifting window motor is avoided.

Referring to fig. 4, fig. 4 is a schematic circuit diagram of a second embodiment of an anti-pinch control circuit of a lift window motor of the present invention;

based on above-mentioned first embodiment, this embodiment lift window motor's anti-pinch control circuit still includes: a rising signal detection circuit 50 and a falling signal detection circuit 60;

the input end of the rising signal detection circuit 50 is connected to a rising signal collection point, the rising signal collection point is located on a rising signal line between the rising signal output end of the lifting controller 30 and the lifting window motor, and the output end of the rising signal detection circuit 50 is connected to the main control unit 10;

the input end of the falling signal detection circuit 60 is connected to a falling signal collection point, the falling signal collection point is located on a falling signal line between the switch circuit 40 and the window lifting motor, and the output end of the falling signal detection circuit 60 is connected to the main control unit 10.

It should be understood that the master control unit 10 monitors the actual motion output to both ends of the motor through the up signal detection circuit 50 and the down signal detection circuit 60. In a specific implementation, after the main control unit 10 outputs the intention signal to the driving unit 20, the rising signal detection circuit 50 and the falling signal detection circuit 60 acquire the detection signal, so as to determine whether the actual motion of the motor is consistent with the control intention, and if not, the type and the position of the abnormality can be analyzed according to the detection signal.

It should be noted that the main control unit 10 is provided with a flag i _ up _ FB corresponding to the rising signal detection circuit 50 and a flag i _ down _ FB corresponding to the falling signal detection circuit 60. When detecting that a high potential exists on the rising signal line according to the rising signal detection circuit 50, setting i _ up _ FB to 1, otherwise setting i _ up _ FB to 0; when the falling signal detection circuit 60 detects that a high potential is present on the falling signal line, i _ down _ FB is set to 1, otherwise, i _ down _ FB is set to 0.

In the present embodiment, a detection circuit is provided, referring to fig. 5, and fig. 5 is a schematic diagram of the detection circuit of the anti-pinch control circuit of the window motor for lifting and lowering according to the present invention; fig. 5 is a schematic diagram, and a specific detection circuit can be designed according to actual situations. The detection circuit of fig. 5 is an ascending signal detection circuit 50 and/or a descending signal detection circuit 60, wherein a capacitor is used for filtering, a zener diode is used for stabilizing voltage, and a second resistor is used for dividing voltage, so that the voltage of the line where the first resistor is located is more stable, and when the detection circuit detects that the line where the first resistor is located has high voltage, the main control unit 10 sets i _ down _ FB to 1.

The ascending signal detection circuit 50 for detecting the ascending signal line and the descending signal detection circuit 60 for detecting the descending signal line are arranged in the embodiment, so that the main control unit 10 can conveniently judge whether the actual action and the control intention of the motor are consistent or not and judge whether the restorable fuse is disconnected or not, the rapid detection of circuit abnormity and the anti-pinch reverse control under the thermal protection of the lifting window motor are realized, and the stability and the safety of the lifting window are improved.

Referring to fig. 6, fig. 6 is a flowchart illustrating a first embodiment of an anti-pinch control method for a window motor for lifting and lowering a window according to the present invention.

As shown in fig. 6, the anti-pinch control method of the lift window motor provided by the embodiment of the invention is applied to the anti-pinch control circuit of the lift window motor, and the anti-pinch control method of the lift window motor comprises the following steps:

step S10: the main control unit outputs an anti-pinch intention signal to the driving unit when determining that the anti-pinch action needs to be executed and detecting that a restorable fuse in the switch circuit is opened.

Step S20: the driving unit generates a first control signal and a second control signal according to the anti-pinch intention signal, outputs the first control signal to the lifting controller, and outputs the second control signal to the switching circuit.

Step S30: and the lifting controller is used for attracting the falling signal output end according to the first control signal so as to enable the falling signal output end to output a falling control signal.

Step S40: and the switching circuit is conducted according to the second control signal and outputs the descending control signal to the window lifting motor.

In an embodiment, the method further comprises: the main control unit receives a falling end detection signal through a falling signal detection circuit in the anti-pinch action execution process, and judges that the anti-pinch action execution process is achieved after the falling end detection signal changes, and a restorable fuse in the switch circuit is disconnected to execute the step of outputting an anti-pinch intention signal to the driving unit.

It can be understood that, in the anti-pinch action execution process, the main control unit receives a falling end detection signal i _ down _ FB in real time through the detection circuit, when the detection result shows that i _ down _ FB is changed from 1 to 0, the situation that the anti-pinch is not executed but the PTC is burned occurs, at this time, the main control unit outputs an anti-pinch intention signal i _ ap to 1 to the driving unit, the driving unit outputs i _ ap _ out to 1 to the switch circuit, outputs i _ down _ out to 1 to the lifting controller, and the lifting controller attracts the falling signal output end, and the switch circuit conducts the falling signal output end of the lifting controller and the lifting window motor, so that the lifting window motor continues to execute the anti-pinch action.

In an embodiment, after the step S40, the method further includes: the main control unit outputs an anti-pinch intention ending signal to the driving unit after the anti-pinch action is executed; the driving unit generates a third control signal and a fourth control signal according to the anti-pinch intention ending signal, outputs the third control signal to a lifting controller and outputs the fourth control signal to a switching circuit; the lifting controller releases a falling signal output end according to the third control signal so that the falling signal output end stops outputting the falling control signal; and the switching circuit is switched off according to the fourth control signal, and stops outputting the descending control signal to the window lifting motor.

It should be noted that, the main control unit receives the information transmitted by the hall sensor, sets Ap _ action _ f to 1 when it is determined that the descending distance of the anti-pinch reverse rotation of the car window reaches the preset safety distance, and determines whether the anti-pinch action is finished by identifying the value of Ap _ action _ f. When Ap _ action _ f is equal to 1, the main control unit outputs an anti-pinch intention ending signal i _ up which is 0& i _ down which is 0 to the driving unit, the driving unit outputs a third control signal i _ up _ out which is 0& i _ down _ out which is 0 and a fourth control signal i _ Ap _ out which is 0, the lifting controller stops outputting a descending control signal according to the releasing descending signal output end, the switch circuit is disconnected, the descending control signal is stopped being output to the lifting window motor, namely the main control unit controls the lifting window motor to stop reversing after the anti-pinch action is finished.

It should be understood that the above is only an example, and the technical solution of the present invention is not limited in any way, and in a specific application, a person skilled in the art may set the technical solution as needed, and the present invention is not limited thereto.

In the embodiment, when the main control unit determines that the anti-pinch action needs to be executed and detects that a restorable fuse in a switch circuit is disconnected, an anti-pinch intention signal is output to a driving unit; the driving unit generates a first control signal and a second control signal according to the anti-pinch intention signal, outputs the first control signal to the lifting controller and outputs the second control signal to the switching circuit; the lifting controller attracts a falling signal output end according to a first control signal so that the falling signal output end outputs a falling control signal; and the switching circuit is conducted according to the second control signal and outputs the descending control signal to the window lifting motor. In this way, when the recoverable fuse breaks, the control switch circuit switches on, and output decline control signal to lift window motor has realized lift window motor's the function of preventing pressing from both sides reversal, has avoided lift window motor thermal protection to stop actuating and has leaded to preventing pressing from both sides the function inefficacy of reversal.

It should be noted that the above-described work flows are only exemplary, and do not limit the scope of the present invention, and in practical applications, a person skilled in the art may select some or all of them to achieve the purpose of the solution of the embodiment according to actual needs, and the present invention is not limited herein.

In addition, the technical details not described in detail in this embodiment can be referred to the anti-pinch control circuit of the lift window motor provided in any embodiment of the present invention, and are not described herein again.

Referring to fig. 7, fig. 7 is a flowchart illustrating an anti-pinch control method for a window lift motor according to a second embodiment of the present invention.

Based on the first embodiment, the anti-pinch control method of the window motor for lifting and lowering in this embodiment further includes, before the step S10:

step S101: after the main control unit determines that anti-pinch action needs to be executed, a rising signal detection circuit receives a rising detection signal, a falling signal detection circuit receives a falling detection signal, and whether the restorable fuse is disconnected or not is detected according to the rising detection signal and the falling detection signal.

It should be understood that the main control unit of this embodiment detects whether the lift window motor performs the anti-pinch reverse rotation function through the ascending signal detection circuit and the descending signal detection circuit, and determines that the recoverable fuse is turned off if the lift window motor does not perform the anti-pinch reverse rotation function, and then performs steps S10 to S40 to implement that the anti-pinch reverse rotation function is still performed when the heat protection of the lift window motor stops.

Specifically, the step S101 includes: after determining that anti-pinch action needs to be executed, the main control unit outputs a descending intention signal to the driving unit so that the driving unit drives the lifting controller to suck the descending signal output end according to the descending intention signal; receiving a first detection signal by a rising signal detection circuit and a second detection signal by a falling signal detection circuit; when the lifting window motor is determined not to execute a descending action according to the first detection signal and the second detection signal, outputting a rising intention signal to the driving unit so that the driving unit drives the lifting controller to suck a rising signal output end according to the rising intention signal; and receiving a rising detection signal through a rising signal detection circuit, receiving a falling detection signal through a falling signal detection circuit, and detecting whether the recoverable fuse is disconnected or not according to the rising detection signal and the falling detection signal.

When determining Ap _ action to be 1, the main control unit outputs a signal i _ up _ 0& i _ down _ 1, and the driving unit outputs a signal i _ up _ out _ 0& i _ down _ out _ 1; the lifting controller attracts a falling signal output end under the control of the driving unit, and the main control unit receives an i _ up _ FB signal through the rising signal detection circuit and receives an i _ down _ FB signal through the falling signal detection circuit.

Specifically, when i _ up _ FB is 0 (low level) and i _ down _ FB is 1 (high level), it is determined that the window lifter motor is performing a descending action, which indicates that the resettable fuse is not disconnected, and the main control unit controls the window lifter motor to continue performing an anti-pinch action until Ap _ action _ f is 1.

Specifically, when i _ up _ FB is 0 and i _ down _ FB is 0, it is determined that the window regulator is not performing the lowering operation, and there are two cases: the lift controller is abnormal or the recoverable fuse is open. In this embodiment, the main control unit further detects the specific abnormality type by outputting a rising intention signal, receiving a rising detection signal, and receiving a falling detection signal.

Specifically, when the main control unit detects that the rising detection signal changes relative to the first detection signal and the falling detection signal changes relative to the second detection signal, the main control unit determines that the restorable fuse is turned off.

It should be understood that, referring to fig. 4, if the recoverable fuse is open, the main control unit outputs a falling intention signal, the rising signal detection circuit is at a low voltage, and the falling signal detection circuit is at a low voltage, where i _ up _ FB is 0 and i _ down _ FB is 0; the main control unit then outputs a rising intention signal, the driving unit controls the rising controller to attract the rising signal output end, the rising signal output end is conducted with the lifting window motor, the rising signal detection circuit is converted from low voltage to high voltage, the falling signal detection circuit is converted from low voltage to high voltage, at the moment, i _ up _ FB is changed from 0 to 1, and i _ down _ FB is changed from 0 to 1.

Further, after the rising detection signal is received by the rising signal detection circuit and the falling detection signal is received by the falling signal detection circuit, the method further includes: and when the rising detection signal is detected not to generate signal change relative to the first detection signal or the falling detection signal is detected not to generate signal change relative to the second detection signal, judging that the falling signal output end of the rising and falling controller cannot be attracted.

It should be noted that when the i _ up _ FB is not changed from 0 to 1, and the i _ down _ FB is not changed from 0 to 1, it is determined that the falling signal output end of the lifting controller cannot be attracted, so that the glass cannot rise and fall due to the failure, and a user is prompted to go to a private store for maintenance.

Further, after the receiving the first detection signal by the rising signal detection circuit and the receiving the second detection signal by the falling signal detection circuit, the method further includes: when the first detection signal is detected to be high level and the second detection signal is detected to be low level, judging that the rising signal output end of the lifting controller is adhered and the falling signal output end of the lifting controller can not be attracted; and when the first detection signal and the second detection signal are both high level, judging that the rising signal output end of the lifting controller is stuck and the recoverable fuse is disconnected.

It should be understood that when i _ up _ FB is detected to be 1 and i _ down _ FB is detected to be 0, it is determined that the ascending signal output end of the ascending and descending controller is stuck and the descending signal output end of the ascending and descending controller cannot be attracted, and the fault glass is ascended to the top end and is continuously driven until the PTC is disconnected, so that the user is prompted to go to a private store for maintenance. When detecting that i _ up _ FB is 1 and i _ down _ FB is 1, judging that the ascending signal output end of the ascending and descending controller is stuck and the recoverable fuse is disconnected, wherein the fault glass can only ascend, and under the condition of not triggering anti-pinch, the embodiment allows the window to be closed but cannot descend after the window is closed, and prompts a user to go to a private store for maintenance.

Further, the method further comprises: when detecting that the ascending signal output end of the ascending and descending controller is adhered, the main control unit outputs a descending intention signal to the driving unit so that the driving unit drives the ascending and descending controller to suck the descending signal output end according to the descending intention signal; when detecting that the switch ascending signal is continuously effective and determining that the anti-pinch action is not required to be executed, stopping outputting the descending intention signal so that the window glass is driven by the window ascending and descending motor to ascend to the top end; when the vehicle window glass is detected to rise to the top end, a falling intention signal is output to the driving unit, so that the driving unit drives the lifting controller to suck the falling signal output end according to the falling intention signal.

It should be noted that, in this embodiment, an exception handling method when the rising signal output end of the rising and falling controller is stuck is provided. When the adhesion of the ascending signal output end of the ascending and descending controller is detected, the descending signal output end of the ascending and descending controller is driven to suck, so that the ascending loop and the descending loop of the ascending and descending window motor are both high level, and the glass action is stopped. When a user continuously inputs a switch ascending signal, the main control unit judges whether Ap _ action is equal to 1, if so, the descending signal output end of the ascending and descending controller is continuously driven to suck; if not, stopping outputting the falling intention signal, driving the window glass to ascend to the top end by the window glass ascending and descending motor, and then continuously outputting the falling intention signal. So that the ascending loop and the descending loop of the lifting window motor are both high level, and the glass action stops.

In an embodiment, the method further comprises: when the main control unit detects a switch rising signal, the main control unit outputs a rising intention signal to the driving unit, so that the driving unit drives the rising controller to suck a rising signal output end according to the rising intention signal, receives a third detection signal through a rising signal detection circuit, and receives a fourth detection signal through a falling signal detection circuit; when the third detection signal is detected to be at a low level, judging that the rising signal output end of the lifting controller cannot be attracted; when the third detection signal and the fourth detection signal are both detected to be in a high level, stopping outputting the rising intention signal, receiving a fifth detection signal through the rising signal detection circuit, and receiving a sixth detection signal through the falling signal detection circuit; when the fifth detection signal is detected to be at a high level or the sixth detection signal is detected to be at a high level, judging that the descending signal output end of the lifting controller is adhered, and continuously outputting a lifting intention signal to the driving unit so that the driving unit drives the lifting controller to suck the ascending signal output end according to the lifting intention signal; and when the fifth detection signal is detected to be low level and the sixth detection signal is detected to be low level, judging that the recoverable fuse is switched off.

It should be understood that, when the main control unit detects the switch rising signal, the output rising intention signal i _ up is 1& i _ down is 0, the output of the driving unit i _ up _ out is 1& i _ down _ out is 0, and the rising and falling controller attracts the rising signal output end under the control of the driving unit. And the main control unit determines whether the lifting window motor executes lifting action or not through the i _ up _ FB signal and the i _ down _ FB signal. And when the i _ up _ FB is equal to 1 and the i _ down _ FB is equal to 0, determining that the window lifting motor performs a lifting action, and continuing to move the window upwards. When i _ up _ FB is equal to 0, the rising signal output end of the lifting controller cannot be attracted, the glass can only fall due to the fault, and a user cannot close the window to prompt the user to go to a private store for maintenance. When i _ up _ FB equals 1 and i _ down _ FB equals 1, there are two cases at this time: the lifting controller is abnormal or the recoverable fuse is disconnected, and the output of a lifting intention signal is stopped, namely i _ up is 0& i _ down is 0; the i _ up _ out is 0& i _ down _ out is 0, the main control unit receives the i _ up _ FB and the i _ down _ FB through a detection line, when the i _ up _ FB is detected to be 1 or the i _ down _ FB is detected to be 1, the descending signal output end of the ascending and descending controller is judged to be adhered, and the main control unit outputs an ascending intention signal i _ up is 1& i _ down is 0; upon detecting that i _ up _ FB is 0 and i _ down _ FB is 0, it is determined that the recoverable fuse is off.

In this embodiment, after the main control unit determines that the anti-pinch action needs to be executed, the rising signal detection circuit receives the rising detection signal, the falling signal detection circuit receives the falling detection signal, and whether the resettable fuse is disconnected or not is detected according to the rising detection signal and the falling detection signal. Realize the unusual short-term test of circuit and lift window motor thermal protection down prevent pressing from both sides reversal control, when the restorable fuse breaks off, control switch circuit switches on, outputs decline control signal to lift window motor, has realized lift window motor prevent pressing from both sides the reversal function, has avoided lift window motor thermal protection to stop to actuate and has leaded to preventing pressing from both sides the reversal function inefficacy, has improved the stability and the security of lift window.

Further, it is to be noted that, in this document, the terms "comprises," "comprising," or any other variation thereof, are intended to cover a non-exclusive inclusion, such that a process, method, article, or system that comprises a list of elements does not include only those elements but may include other elements not expressly listed or inherent to such process, method, article, or system. Without further limitation, an element defined by the phrase "comprising an … …" does not exclude the presence of other like elements in a process, method, article, or system that comprises the element.

The above-mentioned serial numbers of the embodiments of the present invention are merely for description and do not represent the merits of the embodiments.

Through the description of the foregoing embodiments, it is clear to those skilled in the art that the method of the foregoing embodiments may be implemented by software plus a necessary general hardware platform, and certainly may also be implemented by hardware, but in many cases, the former is a better implementation. Based on such understanding, the technical solution of the present invention or portions thereof that contribute to the prior art may be embodied in the form of a software product, where the computer software product is stored in a storage medium (e.g. Read Only Memory (ROM)/RAM, magnetic disk, optical disk), and includes several instructions for enabling a terminal device (e.g. a mobile phone, a computer, a server, or a network device) to execute the method according to the embodiments of the present invention.

The above description is only a preferred embodiment of the present invention, and not intended to limit the scope of the present invention, and all modifications of equivalent structures and equivalent processes, which are made by using the contents of the present specification and the accompanying drawings, or directly or indirectly applied to other related technical fields, are included in the scope of the present invention.

Claims

1. The utility model provides a lift window motor prevent pressing from both sides control circuit, a serial communication port, lift window motor prevent pressing from both sides control circuit includes:

2. The anti-pinch control circuit of a lift window motor of claim 1, further comprising: a rising signal detection circuit and a falling signal detection circuit;

the input end of the ascending signal detection circuit is connected with an ascending signal acquisition point, the ascending signal acquisition point is positioned on an ascending signal line between the ascending signal output end of the ascending and descending controller and the ascending and descending window motor, and the output end of the ascending signal detection circuit is connected with the main control unit;

3. The utility model provides a lift window motor prevent pressing from both sides control method, a serial communication port, lift window motor prevent pressing from both sides control method and be applied to lift window motor prevents pressing from both sides control circuit, lift window motor prevent pressing from both sides control method and include:

the main control unit outputs an anti-pinch intention signal to the driving unit when determining that the anti-pinch action needs to be executed and detecting that a restorable fuse in the switch circuit is disconnected;

the driving unit generates a first control signal and a second control signal according to the anti-pinch intention signal, outputs the first control signal to a lifting controller and outputs the second control signal to a switching circuit;

4. The anti-pinch control method of a lift window motor of claim 3, further comprising:

5. The anti-pinch control method of a raised and lowered vehicle window motor as claimed in claim 3, wherein before the main control unit outputs an anti-pinch intention signal to the driving unit when it is determined that an anti-pinch action is required and a resettable fuse in the switching circuit is detected to be opened, the method further comprises:

6. The anti-pinch control method of a lifting window motor as claimed in claim 5, wherein the main control unit receives a rising detection signal through a rising signal detection circuit and a falling detection signal through a falling signal detection circuit after determining that the anti-pinch action needs to be performed, and detects whether the resettable fuse is disconnected according to the rising detection signal and the falling detection signal, comprising:

after determining that anti-pinch action needs to be executed, the main control unit outputs a descending intention signal to the driving unit so that the driving unit drives the lifting controller to suck the descending signal output end according to the descending intention signal;

7. The anti-pinch control method of an elevating window motor as claimed in claim 6, wherein the main control unit determines that the resettable fuse is open when the rising detection signal is detected to be a signal change relative to the first detection signal and the falling detection signal is detected to be a signal change relative to the second detection signal.

8. The anti-pinch control method of a raised window motor as claimed in claim 6, wherein after receiving the rising detection signal by the rising signal detection circuit and receiving the falling detection signal by the falling signal detection circuit, the method further comprises:

when the rising detection signal is detected not to generate signal change relative to the first detection signal or the falling detection signal is detected not to generate signal change relative to the second detection signal, the falling signal output end of the rising and falling controller is judged not to be attracted;

after the first detection signal is received by the rising signal detection circuit and the second detection signal is received by the falling signal detection circuit, the method further comprises:

when the first detection signal is detected to be at a high level and the second detection signal is detected to be at a low level, judging that a rising signal output end of the lifting controller is adhered and a falling signal output end of the lifting controller cannot be attracted;

9. The anti-pinch control method of a lift window motor of claim 8, further comprising:

when the vehicle window glass is detected to rise to the top end, a falling intention signal is output to the driving unit, so that the driving unit drives the lifting controller to attract the falling signal output end according to the falling intention signal.

10. The anti-pinch control method of a lift window motor of claim 3, further comprising:

when detecting that the third detection signal and the fourth detection signal are both at a high level, stopping outputting the rising intention signal, and receiving a fifth detection signal through the rising signal detection circuit and a sixth detection signal through the falling signal detection circuit;

when the fifth detection signal is detected to be high level or the sixth detection signal is detected to be high level, the descending signal output end of the ascending and descending controller is judged to be adhered, and an ascending intention signal is continuously output to the driving unit, so that the driving unit drives the ascending and descending controller to attract the ascending signal output end according to the ascending intention signal;