A sweeping leg induction method applied to the automatic opening and closing of the rear tailgate and sliding door of a vehicle

Abstract

A sweeping leg induction method applied to the automatic opening and closing of a car tailgate and a sliding door. An induction device is provided near the car tailgate or the sliding door, which includes a control unit and an induction unit. The induction unit at least includes two induction electrodes arranged in a left-right layout. With the user's sweeping leg movement as a reference within the area of the car tailgate and / or the sliding door, the induction unit receives the induction signal generated by the user's sweeping leg. The control unit completes the detection of the change in the physical signal of the induction unit, identifies the user's sweeping leg movement, determines the intention of the user to open and close the car tailgate and / or the sliding door, and outputs a decision signal to the car tailgate and / or the sliding door controller to realize the automatic opening and closing of the car tailgate and / or the sliding door. The present invention reduces the overall installation area, simplifies the installation method, and improves the detection sensitivity and reliability.

Description

Technical Field

[0001] The present invention relates to a sweeping leg induction method for automatically opening and closing the tailgate and sliding door of an automobile. Background Art

[0002] When an automobile user holds items in both hands, it is very inconvenient to open and close (hereinafter referred to as "open and close") the tailgate or sliding door of the automobile (hereinafter referred to as "electric door").

[0003] The existing kicking induction device applied to the opening and closing function of the automobile electric door is designed as follows: Two parallel wire-type induction electrodes are connected to a control unit and installed inside the rear bumper or under the sliding door. The control unit detects the capacitance change of the induction unit caused by the user's kicking action, identifies the user's kicking action to determine the user's intention to open and close the electric door, and sends an opening signal to the electric door controller.

[0004] This solution uses two parallel wire-type induction electrodes as the induction unit, resulting in a large installation space, high requirements for the installation environment, many installation fixing points, complex installation processes, and long installation time; in the detection method, the single capacitance change on both induction electrodes is detected simultaneously and determined as a valid kicking action, so the risk of false detection is high during the detection process.

[0005] Therefore, how to improve the existing solution of the two parallel wire methods with the induction unit arranged front and back, on the one hand, reduce the overall installation area and simplify the installation method, and on the other hand, improve the detection sensitivity and reliability, has always been an urgent problem for those in the industry to solve. Summary of the Invention

[0006] The purpose of the present invention is to overcome the deficiencies of the prior art and provide a sweeping leg induction method for automatically opening and closing the tailgate and sliding door of an automobile. Through the multi-point induction method (mechanism) of the sweeping leg action, compared with the existing single-point induction method of the kicking action, it has the characteristics of high sensitivity, high reliability, small space occupied by the device, simple installation process, and low cost.

[0007] The present invention is implemented as follows: A sweeping leg induction method for automatically opening and closing the tailgate and sliding door of an automobile includes the following steps:

[0008] a. Induction setting step: An induction device is set near the tailgate or sliding door of the automobile. The induction device includes a control unit and an induction unit connected to the control unit. The induction unit includes at least two induction electrodes arranged in a left-right manner;

[0009] b. Sweeping leg action step: With the user's sweeping leg action as a reference in the area of the tailgate and / or sliding door of the automobile, the induction unit receives the induction signal generated by the user's sweeping leg;

[0010] c. Sweeping leg sensing step: The control unit detects the change of the physical signal of the detection and sensing unit through the sensing electrode, recognizes the user's sweeping leg action, determines the user's intention to open / close the vehicle tailgate and / or side sliding door, and outputs a decision signal to the vehicle tailgate and / or side sliding door controller to realize the automatic opening and closing of the vehicle tailgate and / or side sliding door.

[0011] In the above-mentioned sweeping leg sensing method applied to the automatic opening and closing of the vehicle tailgate and side sliding door, the sensing unit can be of an integrated structure or a split structure.

[0012] In the above-mentioned sweeping leg sensing method applied to the automatic opening and closing of the vehicle tailgate and side sliding door, the sensing device further includes a wireless RF conversion unit, which is installed near the vehicle tailgate and / or side sliding door controller and is connected to it by a wire harness. The decision signal is output through a wireless RF channel. After receiving the decision signal, the wireless RF conversion unit converts it into a hard wire control signal for the electric door controller.

[0013] In the above-mentioned sweeping leg sensing method applied to the automatic opening and closing of the vehicle tailgate and side sliding door, the sensing unit adopts a capacitive sensing unit, an infrared sensing unit or a radar sensing unit.

[0014] In the above-mentioned sweeping leg sensing method applied to the automatic opening and closing of the vehicle tailgate and side sliding door, the sensing electrodes of the capacitive sensing unit can be realized by wiring on a printed circuit board (PCB), or by winding wires or processing metal conductors.

[0015] In the above-mentioned sweeping leg sensing method applied to the automatic opening and closing of the vehicle tailgate and side sliding door, the shape of the sensing electrodes of the sensing unit is rectangular, square, circular, triangular, rhombic, serpentine or irregular.

[0016] In the above-mentioned sweeping leg sensing method applied to the automatic opening and closing of the vehicle tailgate and side sliding door, the sensing electrodes are fixed near the vehicle tailgate or side sliding door by means of double-sided adhesive bonding, riveting or clamping.

[0017] In the above-mentioned sweeping leg sensing step applied to the automatic opening and closing of the vehicle tailgate and side sliding door, it is carried out according to the following method: Two sensing electrodes arranged in a left-right layout respectively sense area A and area B, with area M in the middle. There are two situations in area M: cross-sensing, no sensing or deliberate shielding. The three areas form three effective sensing areas with different capacitance distributions. During the sweeping leg process, when the leg enters the sensing area, the capacitance value of the sensing electrode in the corresponding sensing area increases. A capacitance change threshold is set. If the capacitance change amount exceeds the set threshold, the trigger state of this sensing electrode is recorded as 1; if the capacitance change amount does not exceed the set threshold, the trigger state of this sensing electrode is recorded as 0.

[0018] In the above-mentioned method for detecting leg sweeping for automatically opening and closing the rear door and sliding door of a vehicle, the final output signal mode is: directly output the high and low levels of the hard-wired signal to the electric door controller through the OC circuit of the sensing device.

[0019] In the above-mentioned method for detecting leg sweeping for automatically opening and closing the rear door and sliding door of a vehicle, the final output signal mode is: the sensing device includes a radio frequency output chip that sends out radio frequency signals. The wireless RF conversion unit receives the decision signal sent out by the sensing device and then outputs a hard-wired signal to the electric door controller through the OC circuit of the wireless RF conversion unit.

[0020] Due to the adoption of the above technical solution, the induction unit of the present invention changes the two parallel wires arranged front and back in the existing solution to at least two induction areas arranged left and right, reducing the overall installation area; simplifying the installation method; the recognition method of the present invention determines the user's intention to open and close the electric door by recognizing the leg sweeping actions on the left and right two induction areas, thus evolving from the existing single-point induction and recognition to double-point induction and recognition, and further improving the detection sensitivity and reliability. BRIEF DESCRIPTION OF THE DRAWINGS

[0021] Figure 1 It is a system block diagram of the sensing device for the method for detecting leg sweeping for automatically opening and closing the rear door and sliding door of a vehicle according to the present invention;

[0022] Figure 2 It is a schematic diagram of the leg sweeping induction area;

[0023] Figure 3 It is one of the schematic diagrams of the leg sweeping mode of the present invention.

[0024] Figure 4 It is another schematic diagram of the leg sweeping mode of the present invention. DETAILED DESCRIPTION OF THE EMBODIMENTS

[0025] In order to better understand the technical solution of the present invention, the following is a detailed description through specific embodiments in combination with the drawings.

[0026] Please refer to Figure 1 , the sensing device is an assembled product composed of a control unit and an induction unit. The induction unit is a unit for sensing capacitance changes and includes induction electrode A and induction electrode B. The control unit is a controller (MCU) for detecting, recognizing, judging, and outputting, including SOC (system on chip), LDO (low dropout linear regulator), LIN (local interconnect network), OC (open collector), and RF (radio frequency).

[0027] A method for detecting leg sweeping for automatically opening and closing the rear door and sliding door of a vehicle according to the present invention includes the following steps:

[0028] a. Inductive setting steps: An inductive device is set inside the rear door of the vehicle and / or below the sliding door. The inductive device includes a control unit, an inductive unit connected to the control unit, and a wireless RF conversion unit. The wireless RF conversion unit is installed near the rear door controller and / or the sliding door controller of the vehicle and is connected to it by a wire harness, and outputs a decision signal through a wireless RF channel. After receiving the decision signal, the wireless RF conversion unit converts it into a hard-wired control signal for the electric door controller.

[0029] The inductive unit includes at least two inductive electrodes arranged in a left-right layout.

[0030] The inductive unit can be of an integral structure or a split structure.

[0031] The inductive unit uses a capacitive inductive unit, an infrared inductive unit, or a radar inductive unit.

[0032] The inductive electrodes of the capacitive inductive unit can be realized by wiring on a printed circuit board (PCB), or by winding wires or processing metal conductors.

[0033] The inductive electrodes are arranged in a left-right layout and are fixed to the rear door and the sliding door of the vehicle by means of double-sided adhesive bonding, riveting, or clamping.

[0034] The shape of the inductive electrodes of the inductive unit is rectangular, square, circular, triangular, rhombic, serpentine, or irregular.

[0035] b. Leg-sweeping action steps: Inside the area of the rear door and / or the sliding door of the vehicle, with the user's leg-sweeping action as a reference, the inductive unit receives the inductive signal generated by the user's leg-sweeping.

[0036] c. Leg-sweeping induction steps: The control unit completes the detection of the change in the physical signal of the inductive unit through the inductive electrodes, identifies the user's leg-sweeping action, determines the user's intention to open or close the rear door and / or the sliding door of the vehicle, and outputs a decision signal to the rear door and / or the sliding door controller to realize the automatic opening and closing of the rear door and / or the sliding door of the vehicle.

[0037] See Figure 3 、 Figure 4 , the method for identifying the user's leg-sweeping action and determining the user's intention to open or close the rear door and / or the sliding door of the vehicle is as follows.

[0038] A. Induction: See Figure 2, two induction electrodes arranged in a left-right layout respectively sense Area A and Area B, with Area M in the middle. There are two situations in Area M: cross induction, no induction, or deliberate shielding. These three areas form three effective induction areas with different capacitance distributions. During the leg-sweeping process, when the leg enters the induction area, the capacitance value of the induction electrode in the corresponding induction area increases. A capacitance change threshold is set. If the capacitance change exceeds the set threshold, the trigger state of this induction electrode is recorded as 1; if the capacitance change does not exceed the set threshold, the trigger state of this induction electrode is recorded as 0.

[0039] Final output signal mode 1: directly output the high and low levels of the hard-wired signal to the electric door controller through the OC circuit of the induction device.

[0040] Final output signal mode 2: The RF output chip in the induction device sends out an RF signal. The RF conversion unit receives the decision signal sent by the induction device and then outputs a hard-wired signal to the electric door controller through the OC circuit of the RF conversion unit.

[0041] In summary, the leg-sweeping induction device described in the present invention is composed of an induction unit and a control unit, and is installed near the rear car door or the sliding door. In terms of method, the control unit identifies the user's leg-sweeping action by detecting the capacitance change of the induction unit. The software algorithm in the control unit determines the user's intention to open or close the electric door, and sends an opening and closing signal to the vehicle electric door controller to drive the actuator to open and close the electric door, which can liberate the user's hands and improve the comfort and convenience of using the vehicle.

[0042] Those of ordinary skill in the art in this technical field should recognize that the above embodiments are only used to illustrate the present invention, rather than to limit the present invention. As long as it is within the scope of the essential spirit of the present invention, the changes and modifications to the above embodiments will fall within the scope of the claims of the present invention.

Claims

1. A sweeping leg induction method applied to the automatic opening and closing of a car tailgate or sliding door, comprising the following steps: a. Induction setting step: An induction device is set near the car tailgate or sliding door. The induction device includes a control unit and an induction unit connected to the control unit. The induction unit includes at least two induction electrodes arranged in a left-right manner; b. Sweeping leg action step: Taking the user's sweeping leg action as a reference within the area of the car tailgate or sliding door, the induction unit receives the induction signal generated by the user's sweeping leg; c. Sweeping leg induction step: The control unit detects the change of the physical signal of the induction unit through the induction electrode, identifies the user's sweeping leg action, determines the intention of the user to open or close the car tailgate or sliding door, and outputs a decision signal to the car tailgate or sliding door controller to realize the automatic opening and closing of the car tailgate or sliding door. The induction device further includes a wireless RF conversion unit, which is installed near the car tailgate or sliding door controller and connected to it by a wire harness, and outputs the decision signal through a wireless RF channel. After receiving the decision signal, the wireless RF conversion unit converts it into a hard-wired control signal for the electric door controller. In the sweeping leg induction step, the following method is adopted: Two induction electrodes arranged in a left-right manner respectively sense area A and area B, with area M in the middle. There are two situations in area M: cross induction, no induction or deliberate shielding. The three areas form three effective induction areas with different capacitance distributions. During the sweeping leg process, when the leg enters the induction area, the capacitance value of the induction electrode in the corresponding induction area increases. A capacitance change threshold is set. If the capacitance change amount exceeds the set threshold, the trigger state of this induction electrode is recorded as 1; if the capacitance change amount does not exceed the set threshold, the trigger state of this induction electrode is recorded as 0.

2. The sweeping leg induction method for automatic opening and closing of a car tailgate or a sliding door tailgate or a sliding door according to claim 1, wherein: The induction unit is of an integrated structure or a split structure.

3. A sweeping leg induction method applied to the automatic opening and closing of a car tailgate or sliding door according to claim 1, characterized in that: The induction unit adopts a capacitive induction unit, an infrared induction unit or a radar induction unit.

4. A sweeping leg induction method applied to the automatic opening and closing of a vehicle tailgate or sliding door according to claim 3, characterized in that: The induction electrodes of the capacitive induction unit are realized by wiring on a printed circuit board (PCB), or by winding wires or processing metal conductors.

5. A sweep leg induction method applied to the automatic opening and closing of a car tailgate or sliding door according to claim 1, characterized in that: The shape of the induction electrodes of the induction unit is rectangular, square, circular, triangular, rhombic or serpentine.

6. A sweeping leg induction method applied to the automatic opening and closing of a car tailgate or sliding door according to claim 1, characterized in that: The induction electrodes are fixed near the car tailgate or sliding door by means of double-sided adhesive bonding, riveting or clamping.

7. A sweeping leg induction method applied to the automatic opening and closing of a car tailgate or sliding door according to claim 1, characterized in that, Final output signal mode: Directly output the high and low levels of the hard-wired signal to the electric door controller through the OC circuit of the induction device.

8. A sweeping leg induction method applied to the automatic opening and closing of a car tailgate or a sliding door according to claim 1, characterized in that, Final output signal mode: The induction device includes a radio frequency output chip, which sends out a radio frequency signal. The wireless RF conversion unit receives the decision signal sent out by the induction device, and then outputs a hard-wired signal to the electric door controller through the OC circuit of the wireless RF conversion unit.

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