Automobile electric seat anti-pinch control system and control method based on millimeter wave radar

Abstract

The invention relates to an automobile electric seat anti-pinch control system and method based on millimeter wave radar. Comprising a backrest adjusting mechanism installed at the position of a seat backrest, a backrest driving motor for driving the backrest adjusting mechanism, a backrest motor Hall sensor installed in the backrest driving motor, a leg support adjusting mechanism installed at the position of a seat leg support, and a leg support driving motor for driving the leg support adjusting mechanism. The leg support motor Hall sensor, the leg support detection millimeter radar, the backrest detection millimeter radar and the seat control module are mounted in the leg support driving motor; the seat control module comprises a motor control module, a position judgment module, an anti-pinch detection module, an anti-pinch control module, a Hall pulse signal acquisition module and an mcu microcontroller; the method has the advantages that by actively detecting the obstacle encountered in the movement process of the seat, the clamping injury risk and the generated discomfort before the anti-clamping function of the seat is triggered are reduced, and meanwhile, the anti-clamping detection accuracy is greatly improved.

Description

Technical Field

[0001] The present invention relates to the field of automobile technology, and in particular to an automobile electric seat anti-pinch control system and a control method based on millimeter wave radar. Background Art

[0002] Most of the existing anti-pinch functions of automobile seats use methods such as current detection and pressure detection. Since the above detection methods are not active enough, the anti-pinch function can only be triggered after the person or object on the seat is under a certain pressure. This will cause people to feel a certain degree of discomfort, and there is also a risk of objects being damaged by being pinched. At the same time, people of different body shapes sitting on the seats may also cause inaccurate detection. Summary of the invention

[0003] In view of the above problems, the purpose of the present invention is to provide an automobile electric seat anti-pinch control system and control method based on millimeter-wave radar, which is used to actively detect obstacles encountered during the movement of the seat to overcome the shortcomings of the above-mentioned prior art.

[0004] The invention provides a millimeter wave radar-based anti-pinch control system for an automobile electric seat, comprising: a backrest adjustment mechanism installed at a seat backrest position, a backrest drive motor driving the backrest adjustment mechanism, a backrest motor Hall sensor installed in the backrest drive motor, a leg rest adjustment mechanism installed at a seat leg rest position, a leg rest drive motor driving the leg rest adjustment mechanism, and a leg rest motor Hall sensor installed in the leg rest drive motor, wherein the backrest motor Hall sensor is used to collect movement position information of the backrest adjustment mechanism, and the leg rest motor Hall sensor is used to collect movement position information of the leg rest adjustment mechanism. The improvement made is that it also comprises: a leg rest detection millimeter wave radar installed on the seat leg rest, a backrest detection millimeter wave radar installed on the seat backrest, and a seat control module; the seat control module comprises: a motor control module, a position judgment module, an anti-pinch detection module, an anti-pinch control module, a Hall pulse signal acquisition module, and an MCU microcontroller;

[0005] The MCU microcontroller is used to receive signals from a driving computer or a physical button for seat adjustment, wherein the driving computer is connected to the MCU microcontroller via a CAN bus;

[0006] The motor control module is used to control the movement of the backrest drive motor and the leg support drive motor according to the signal received by the MCU microcontroller;

[0007] The Hall pulse signal acquisition module is used to collect the Hall pulse square wave signals of the Hall sensor of the backrest motor and the Hall sensor of the leg support motor;

[0008] The position determination module is used to determine whether the leg support adjustment mechanism and the backrest adjustment mechanism move into the anti-pinch area according to the Hall pulse square wave signal;

[0009] The anti-pinch detection module is used to control the leg rest detection millimeter radar and the backrest detection millimeter radar to detect obstacles, and receive signals from the leg rest detection millimeter radar and the backrest detection millimeter radar to detect whether obstacles exist;

[0010] The anti-pinch control module is used to determine whether the distance between the obstacle detected by the anti-pinch detection module and the backrest adjustment mechanism and / or the leg rest adjustment mechanism is less than a preset anti-pinch distance. When it is less than or equal to the preset anti-pinch distance, the anti-pinch control module outputs a control signal to the motor control module to control the backrest drive motor and / or the leg rest drive motor to stop moving, and then move in the opposite direction to a distance greater than the preset anti-pinch distance.

[0011] Another object of the present invention is to provide a control method for an automobile electric seat anti-pinch control system based on millimeter wave radar, which specifically comprises the following steps:

[0012] Step S1: using the driving computer or the physical seat control button to send a start signal to the MCU microcontroller, the MCU microcontroller sends the signal to the motor control module, and the motor control module controls the backrest drive motor and / or the leg rest drive motor to achieve angle adjustment of the backrest adjustment mechanism and / or the leg rest adjustment mechanism;

[0013] Step S2: using the Hall pulse signal acquisition module to collect the Hall pulse square wave signals of the backrest motor Hall sensor and the leg support motor Hall sensor in real time;

[0014] Step S3: using the position determination module to determine whether the leg support adjustment mechanism and / or the backrest adjustment mechanism moves into the anti-pinch area according to the Hall pulse square wave signal acquired in step S2;

[0015] Step S4: when the position judgment module detects that the leg rest adjustment mechanism and / or the backrest adjustment mechanism moves into the anti-pinch area, the anti-pinch detection module starts the leg rest detection millimeter radar and / or the backrest detection millimeter radar to detect whether there is an obstacle;

[0016] Step S5: When the anti-pinch detection module detects the presence of an obstacle in the anti-pinch area, the anti-pinch control module is used to determine whether the distance between the obstacle detected by the anti-pinch detection module and the backrest adjustment mechanism and / or the leg rest adjustment mechanism is less than a preset anti-pinch distance. When it is less than or equal to the preset anti-pinch distance, the anti-pinch control module outputs a control signal to the motor control module to control the backrest drive motor and / or the leg rest drive motor to stop moving, and then move in the opposite direction to a distance greater than the preset anti-pinch distance.

[0017] The beneficial effects of the present invention are as follows: by actively detecting the way in which the seat encounters obstacles during movement, the risk of pinching and the discomfort caused before the seat anti-pinch function is triggered are reduced, while the accuracy of anti-pinch detection is greatly enhanced. BRIEF DESCRIPTION OF THE DRAWINGS

[0018] By referring to the following description in conjunction with the accompanying drawings, and with a more comprehensive understanding of the present invention, other objects and results of the present invention will become more apparent and easy to understand. In the accompanying drawings:

[0019] Figure 1 This is a schematic diagram of the overall structure of Example 1.

[0020] Figure 2 This is a schematic diagram of the first embodiment.

[0021] Figure 3 This is the overall flow chart of Example 2.

[0022] Description of the drawings: backrest adjustment mechanism 1, leg rest adjustment mechanism 2, leg rest detection millimeter radar 3, backrest detection millimeter radar 4. DETAILED DESCRIPTION

[0023] Example 1

[0024] See also Figure 1-2As shown, the present embodiment provides a millimeter-wave radar-based anti-pinch control system for electric seats in automobiles, comprising: a backrest adjustment mechanism 1 installed at the seat back position, a backrest drive motor driving the backrest adjustment mechanism 1, a backrest motor Hall sensor installed in the backrest drive motor, a leg support adjustment mechanism 2 installed at the seat leg support position, a leg support drive motor driving the leg support adjustment mechanism 2, and a leg support motor Hall sensor installed in the leg support drive motor, the backrest motor Hall sensor is used to collect the motion position information of the backrest adjustment mechanism 1, the leg support motor Hall sensor is used to collect the motion position information of the leg support adjustment mechanism 2, a leg support detection millimeter radar 3 installed on the seat leg support, a backrest detection millimeter radar 4 installed on the seat back, and an additional seat control module; the seat control module comprises: a motor control module, a position judgment module, an anti-pinch detection module, an anti-pinch control module, a Hall pulse signal acquisition module, and an MCU microcontroller; the MCU microcontroller is used to receive a signal from a driving computer or a physical button for seat control, wherein the driving computer is connected to the MCU microcontroller via a CAN bus; the motor control module is used to control the position of the seat according to the signal received by the MCU microcontroller The backrest drive motor and the leg support drive motor are controlled; the Hall pulse signal acquisition module is used to collect the Hall pulse square wave signals of the backrest motor Hall sensor and the leg support motor Hall sensor; the position judgment module is used to judge whether the leg support adjustment mechanism 2 and the backrest adjustment mechanism 1 move into the anti-pinch area according to the Hall pulse square wave signals, wherein the position judgment module judges whether the real-time position of the seat is in the preset anti-pinch area according to the number of square waves output by the backrest motor Hall sensor and the leg support motor Hall sensor; the anti-pinch detection module is used to control the leg support detection millimeter radar 3 and the backrest detection millimeter radar 4 Detect obstacles and receive signals from the leg rest detection millimeter radar 3 and the backrest detection millimeter radar 4 to detect whether there are obstacles; the anti-pinch control module is used to determine whether the distance between the obstacle detected by the anti-pinch detection module and the backrest adjustment mechanism 1 and / or the leg rest adjustment mechanism 2 is less than the preset anti-pinch distance. When it is less than or equal to the preset anti-pinch distance, the anti-pinch control module outputs a control signal to the motor control module to control the backrest drive motor and / or the leg rest drive motor to stop moving, and then move in the opposite direction to a distance greater than the preset anti-pinch distance, wherein the judgment result of the anti-pinch control module needs to be performed in the anti-pinch area.

[0025] Example 2

[0026] See also Figure 3 This embodiment provides a control method for an automobile electric seat anti-pinch control system based on millimeter wave radar, which specifically includes the following steps:

[0027] Step S1: using the driving computer or the seat control physical button to send a start signal to the MCU microcontroller, the MCU microcontroller sends the signal to the motor control module, and the motor control module controls the backrest drive motor and / or the leg rest drive motor to achieve angle adjustment of the backrest adjustment mechanism 1 and / or the leg rest adjustment mechanism 2;

[0028] Step S2: using the Hall pulse signal acquisition module to collect the Hall pulse square wave signals of the backrest motor Hall sensor and the leg support motor Hall sensor in real time;

[0029] Step S3: using the position determination module to determine whether the leg support adjustment mechanism 2 and / or the backrest adjustment mechanism 1 moves into the anti-pinch area according to the Hall pulse square wave signal acquired in step S2;

[0030] Step S4: when the position judgment module detects that the leg rest adjustment mechanism 2 and / or the backrest adjustment mechanism 1 moves into the anti-pinch area, the anti-pinch detection module starts the leg rest detection millimeter radar and / or the backrest detection millimeter radar to detect whether there is an obstacle;

[0031] Step S5: When the anti-pinch detection module detects the presence of an obstacle in the anti-pinch area, the anti-pinch control module is used to determine whether the distance between the obstacle detected by the anti-pinch detection module and the backrest adjustment mechanism and / or the leg rest adjustment mechanism is less than a preset anti-pinch distance. When it is less than or equal to the preset anti-pinch distance, the anti-pinch control module outputs a control signal to the motor control module to control the backrest drive motor and / or the leg rest drive motor to stop moving, and then move in the opposite direction to a distance greater than the preset anti-pinch distance.

[0032] The above are only specific embodiments of the present invention, but the protection scope of the present invention is not limited thereto. Any person skilled in the art who is familiar with the technical field can easily think of changes or substitutions within the technical scope disclosed by the present invention, which should be included in the protection scope of the present invention. Therefore, the protection scope of the present invention should be based on the protection scope of the claims.

Claims

1. A millimeter-wave radar-based anti-pinch control system for electric seats, comprising: A backrest adjustment mechanism installed at the seat backrest position, a backrest drive motor driving the backrest adjustment mechanism, a backrest motor Hall sensor installed in the backrest drive motor, a leg rest adjustment mechanism installed at the seat leg rest position, a leg rest drive motor driving the leg rest adjustment mechanism, and a leg rest motor Hall sensor installed in the leg rest drive motor, wherein the backrest motor Hall sensor is used to collect movement position information of the backrest adjustment mechanism, and the leg rest motor Hall sensor is used to collect movement position information of the leg rest adjustment mechanism, and the seat control module further comprises: a leg rest detection millimeter radar installed on the seat leg rest, a backrest detection millimeter radar installed on the seat backrest, and a seat control module; the seat control module comprises: a motor control module, a position judgment module, an anti-pinch detection module, an anti-pinch control module, a Hall pulse signal acquisition module, and an MCU microcontroller; The MCU microcontroller is used to receive signals from the on-board computer or the physical buttons for seat adjustment; The motor control module is used to control the movement of the backrest drive motor and the leg support drive motor according to the signal received by the MCU microcontroller; The Hall pulse signal acquisition module is used to collect the Hall pulse square wave signals of the Hall sensor of the backrest motor and the Hall sensor of the leg support motor; The position determination module is used to determine whether the leg support adjustment mechanism and the backrest adjustment mechanism move into the anti-pinch area according to the Hall pulse square wave signal; The anti-pinch detection module is used to control the leg rest detection millimeter radar and the backrest detection millimeter radar to detect obstacles, and receive signals from the leg rest detection millimeter radar and the backrest detection millimeter radar to detect whether obstacles exist; The anti-pinch control module is used to determine whether the distance between the obstacle detected by the anti-pinch detection module and the backrest adjustment mechanism and / or the leg rest adjustment mechanism is less than a preset anti-pinch distance. When it is less than or equal to the preset anti-pinch distance, the anti-pinch control module outputs a control signal to the motor control module to control the backrest drive motor and / or the leg rest drive motor to stop moving, and then move in the opposite direction to a distance greater than the preset anti-pinch distance.

2. According to claim 1, a control method for an automobile electric seat anti-pinch control system based on millimeter wave radar comprises the following steps: Step S1: using the driving computer or the physical seat control button to send a start signal to the MCU microcontroller, the MCU microcontroller sends the signal to the motor control module, and the motor control module controls the backrest drive motor and / or the leg rest drive motor to achieve angle adjustment of the backrest adjustment mechanism and / or the leg rest adjustment mechanism; Step S2: using the Hall pulse signal acquisition module to collect the Hall pulse square wave signals of the backrest motor Hall sensor and the leg support motor Hall sensor in real time; Step S3: using the position determination module to determine whether the leg support adjustment mechanism and / or the backrest adjustment mechanism moves into the anti-pinch area according to the Hall pulse square wave signal acquired in step S2; Step S4: when the position judgment module detects that the leg rest adjustment mechanism and / or the backrest adjustment mechanism moves into the anti-pinch area, the anti-pinch detection module starts the leg rest detection millimeter radar and / or the backrest detection millimeter radar to detect whether there is an obstacle; Step S5: When the anti-pinch detection module detects the presence of an obstacle in the anti-pinch area, the anti-pinch control module is used to determine whether the distance between the obstacle detected by the anti-pinch detection module and the backrest adjustment mechanism and / or the leg rest adjustment mechanism is less than a preset anti-pinch distance. When it is less than or equal to the preset anti-pinch distance, the anti-pinch control module outputs a control signal to the motor control module to control the backrest drive motor and / or the leg rest drive motor to stop moving, and then move in the opposite direction to a distance greater than the preset anti-pinch distance.

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