Control circuit of automobile door, automobile door handle and electric automobile

Abstract

The utility model relates to a control circuit of an automobile door, an automobile door handle and an electric automobile. The control circuit comprises a touch detection circuit and a control unit. The touch detection circuit comprises a touch sensor and a signal detection circuit; the touch sensor comprises a first sensing area arranged on the outer side of an automobile door handle and a second sensing area arranged on the inner side of the automobile door handle. The signal detection circuit is used for receiving a first touch signal corresponding to the first sensing area or a second touch signal corresponding to the second sensing area, and outputting a first sensing signal based on the first touch signal or outputting a second sensing signal based on the second touch signal; the control unit is used for controlling the automobile door handle to pop up and the whole automobile to be unlocked based on the first induction signal, or controlling the door lock of the automobile door to be unlocked based on the second induction signal so as to open the automobile door, and the problems that the door opening process of a hidden door handle is tedious, and operation experience of a user is not facilitated are solved.

Description

Technical Field

[0001] The utility model relates to the technical field of automobiles, in particular to a control circuit for an automobile door, an automobile door handle and an electric automobile. Background Art

[0002] The opening and closing method of car doors is directly related to the user experience. Various electric vehicle manufacturers have adopted different door opening and closing control methods to improve the user experience, such as hidden door handles, inductive door handles, etc. Among them, hidden door handles usually have sensors installed in the door handle area. When the sensor senses that the passenger is approaching or touching the door handle, the door handle is controlled to pop out. Then the passenger can unlock the door by pulling the popped-out door handle to drive the pull wire, or unlock the door through the micro switch installed on the door handle, and then open the door. The design of hidden door handles requires the installation of sensors on each door, and the connection of the sensor to the corresponding door controller (Door Control Unit, DCU) through a wiring harness to receive and send electrical signals to realize the opening and closing control of the door.

[0003] However, when opening the door with the current hidden door handle, the passenger needs to first touch the door to make the hidden door handle pop out, and then open the door by pulling the door or controlling the micro switch when the door handle pops out. The process is relatively cumbersome and not conducive to the user's operating experience. Utility Model Content

[0004] In view of this, it is necessary to provide a car door control circuit, a car door handle and an electric car to solve the problem in the prior art that the hidden door handle has a cumbersome door opening process and is not conducive to the user's operating experience.

[0005] In a first aspect, in this embodiment, a control circuit for a car door is provided, the control circuit comprising a touch detection circuit and a control unit connected to the touch detection circuit;

[0006] The touch detection circuit includes a touch sensor and a signal detection circuit; the touch sensor includes a first sensing area arranged on the outside of the automobile door handle and a second sensing area arranged on the inside of the automobile door handle;

[0007] The signal detection circuit is connected to the touch sensor, and is used to receive a first touch signal corresponding to the first sensing area or a second touch signal corresponding to the second sensing area, and output a first sensing signal based on the first touch signal or output a second sensing signal based on the second touch signal;

[0008] The control unit is used to control the pop-up of the vehicle door handle and unlocking of the entire vehicle based on the first sensing signal, or to control the unlocking of the door lock of the vehicle door based on the second sensing signal to open the vehicle door.

[0009] In some of the embodiments, the signal detection circuit includes a detection circuit and a switch circuit connected to each other, and the detection circuit is connected to the touch sensor;

[0010] The detection circuit outputs a first detection signal according to the first touch signal; or outputs a second detection signal according to the second touch signal;

[0011] The switch circuit converts the first detection signal or the second detection signal into a corresponding first sensing signal or a corresponding second sensing signal.

[0012] In some embodiments, the switching circuit includes a controllable switch, a control end of the controllable switch receives the first detection signal or the second detection signal, a first end of the controllable switch outputs a corresponding first sensing signal or a second sensing signal, and a second end of the controllable switch is grounded.

[0013] In some embodiments, the switch circuit further includes a resistor R1 and a capacitor C1.

[0014] One end of the resistor R1 is connected to the first end of the controllable switch, the other end of the resistor R1 is connected to one end of the capacitor C1 and the control unit, and the other end of the capacitor C1 is grounded.

[0015] In some embodiments, the signal detection circuit further includes a power supply circuit.

[0016] The power supply circuit is used to supply power to the detection circuit and provide a first pull-up power supply to the first sensing signal or the second sensing signal.

[0017] In some embodiments, the control unit includes a resistor R2 and a capacitor C2.

[0018] One end of the resistor R2 is connected to the second pull-up power supply end, the other end of the resistor R2 is connected to the input end of the first sensing signal or the second sensing signal and one end of the capacitor C2, and the other end of the capacitor C2 is grounded.

[0019] In some embodiments, the control unit includes a vehicle body controller and a door controller of the vehicle door,

[0020] The signal detection circuit is connected to the vehicle body controller, and the vehicle body controller is connected to the door controller;

[0021] The body controller is used to receive and identify the first sensing signal and the second sensing signal, and send a corresponding door control instruction to the door controller; the door controller is used to execute a corresponding door control action based on the door control instruction.

[0022] In some embodiments, the body controller is used to send a pop-up control instruction to the door controller based on the first sensing signal, and the door controller controls the motor corresponding to the car door to drive the car door handle to pop out based on the pop-up control instruction;

[0023] The vehicle body controller is further configured to send a door lock release instruction to the vehicle door controller based on the second sensing signal, and the vehicle door controller controls the door lock of the vehicle door to unlock based on the door lock release instruction so as to open the vehicle door.

[0024] In a second aspect, a car door handle is provided in this embodiment, and the car door handle includes the touch detection circuit as described in the first aspect.

[0025] In a third aspect, an electric vehicle is provided in this embodiment, and the electric vehicle includes the control circuit of the vehicle door as described in the first aspect.

[0026] The control circuit of the automobile door of the utility model expands the touch sensing range of the touch sensor by means of a first sensing area arranged on the outside of the automobile door handle and a second sensing area arranged on the inside of the automobile door handle, and distinguishes the door control functions corresponding to different sensing areas; receives the first touch signal or the second touch signal corresponding to the two sensing areas by means of a signal detection circuit, and outputs the corresponding sensing signal, so as to facilitate the control unit to identify and process the different sensing areas; the control unit executes the corresponding door control action based on the sensing area corresponding to the sensing signal, and controls the door opening process by means of the user touching different areas of the automobile door handle, without controlling the opening of the door by means of a door pull or a micro switch, thereby improving the user's operating experience; the two touch signals generated by the two sensing areas are transmitted to the control unit through the same signal line instead of being transmitted separately, thereby reducing the number of wiring harnesses of the control unit and reducing the wiring difficulty of the control unit. BRIEF DESCRIPTION OF THE DRAWINGS

[0027] Figure 1 is a connection diagram of a control circuit of a car door according to some embodiments of the present application;

[0028] Figure 2 is a connection diagram of a control circuit of a car door in some other embodiments of the present application;

[0029] Figure 3 is a connection diagram of a signal detection circuit in some embodiments of the present application;

[0030] Figure 4 is a circuit connection diagram of a switch circuit in some embodiments of the present application;

[0031] Figure 5 is a connection diagram of a signal detection circuit in some other embodiments of the present application;

[0032] Figure 6 It is a connection diagram of the signal detection circuit and the control unit in some embodiments of the present application. DETAILED DESCRIPTION

[0033] The following will be combined with the drawings in the embodiments of the utility model to clearly and completely describe the technical solutions in the embodiments of the utility model. Obviously, the described embodiments are only part of the embodiments of the utility model, not all of the embodiments. Based on the embodiments in the utility model, all other embodiments obtained by ordinary technicians in this field without creative work are within the scope of protection of the utility model.

[0034] It should be noted that when a component is referred to as being "fixed to" another component, it may be directly on the other component or there may also be a component centered. When a component is considered to be "connected to" another component, it may be directly connected to the other component or there may be a component centered at the same time. When a component is considered to be "set on" another component, it may be directly set on the other component or there may be a component centered at the same time. The terms "vertical", "horizontal", "left", "right" and similar expressions used herein are for illustrative purposes only. "First" and "second" are only for the distinction of component names and do not indicate order.

[0035] Unless otherwise defined, all technical and scientific terms used herein have the same meaning as those commonly understood by those skilled in the art in the technical field of the present invention. The terms used herein in the specification of the present invention are only for the purpose of describing specific embodiments and are not intended to limit the present invention. The term "and / or" used herein includes any and all combinations of one or more related listed items.

[0036] In order to make the above-mentioned purposes, features and advantages of the utility model more obvious and easy to understand, the specific implementation methods of the utility model are described in detail below in conjunction with the accompanying drawings. Among them, the utility model embodiment is described in detail in conjunction with the schematic diagram, and the schematic diagram is only an example, which should not limit the scope of protection of the utility model.

[0037] The control circuit of the automobile door provided by the embodiment of the utility model is further described in detail below in conjunction with the accompanying drawings.

[0038] See also Figure 1, which is a connection diagram of a control circuit of a car door in some embodiments of the present application. The control circuit includes a touch detection circuit 10 and a control unit 20 connected to the touch detection circuit 10. The touch detection circuit 10 includes a touch sensor 12 and a signal detection circuit 16; the touch sensor 12 includes a first sensing area 121 provided on the outside of the car door handle and a second sensing area 122 provided on the inside of the car door handle; the signal detection circuit 16 is connected to the touch sensor 12, and is used to receive a first touch signal Sto_1 corresponding to the first sensing area 121 or a second touch signal Sto_2 corresponding to the second sensing area 122, and output a first sensing signal Stest_1 based on the first touch signal Sto_1, or output a second sensing signal Stest_2 based on the second touch signal Sto_2; the control unit 20 is used to control the pop-up of the car door handle and the unlocking of the whole car based on the first sensing signal Stest_1, or control the unlocking of the door lock of the car door based on the second sensing signal Stest_2 to open the car door.

[0039] Specifically, the touch sensor 12 may be a capacitive sensor.

[0040] When the first sensing area 121 on the outside of the car door handle senses a touch, a first touch signal Sto_1 is output; when the second sensing area 122 on the inside of the car door handle senses a touch, a second touch signal Sto_2 is output. The first touch signal Sto_1 and the second touch signal Sto_2 may be level signals or pulse signals.

[0041] The signal detection circuit 16 can receive the first touch signal Sto_1 or the second touch signal Sto_2 through different signal lines. When receiving the first touch signal Sto_1 or the second touch signal Sto_2, the signal detection circuit 16 outputs the corresponding first sensing signal Stest_1 or the second sensing signal Stest_2 to the control unit 20. The first sensing signal Stest_1 and the second sensing signal Stest_2 can be sent through the same signal line.

[0042] Specifically, the first sensing signal Stest_1 or the second sensing signal Stest_2 may be a PWM signal. In some embodiments, the duty cycles of the first sensing signal Stest_1 and the second sensing signal Stest_2 may be different. In other embodiments, the signal characteristics of the first sensing signal Stest_1 and the second sensing signal Stest_2 are different, and the signal characteristics may be a high level duration, a low level duration, etc. For example, the signal characteristic of the first sensing signal Stest_1 may be that there are two high level durations, a and 2a, respectively, and the two high levels alternate.

[0043] The control unit 20 can identify the sensing signal as the first sensing signal Stest_1 or the second sensing signal Stest_2 according to the duty cycle or signal characteristics of the received sensing signal, and then determine whether the touch position is on the outside or inside of the car door handle, and comprehensively determine whether to perform the corresponding door control action according to the detection results of other sensors. For example, when it is determined that the touch position is on the outside of the car door handle, the control unit 20 can detect the current driving state of the vehicle and the locking state of the entire vehicle. When the detection result meets the corresponding preset conditions, the control unit 20 controls the car door handle to pop out and the entire vehicle to unlock. When it is determined that the touch position is on the inside of the car door handle, the control unit 20 can further control the door lock of the car door to unlock to open the door.

[0044] The car door control circuit provided in this embodiment expands the touch sensing range of the touch sensor by providing a first sensing area on the outside of the car door handle and a second sensing area on the inside of the car door handle, and distinguishes the car door control functions corresponding to different sensing areas; receives the first touch signal or the second touch signal corresponding to the two sensing areas through the signal detection circuit, and outputs the corresponding sensing signal, so as to facilitate the control unit to identify and process the different sensing areas; the control unit executes the corresponding car door control action based on the sensing area corresponding to the sensing signal, and controls the door opening process through the user touching different areas of the car door handle, without controlling the opening of the car door through pulling the door or micro switch, thereby improving the user's operating experience; the two touch signals generated by the two sensing areas are transmitted to the control unit through the same signal line instead of being transmitted separately, thereby reducing the number of wiring harnesses of the control unit and reducing the wiring difficulty of the control unit.

[0045] In some embodiments, Figure 2 FIG. 1 is a schematic diagram of the connection of the control circuit of the automobile door in some other embodiments of the present application. Figure 2 As shown, the control unit 20 includes a vehicle body controller 22 and a door controller 24 of the vehicle door, the signal detection circuit 16 is connected to the vehicle body controller 22 , and the vehicle body controller 22 is connected to the door controller 24 .

[0046] The body controller 22 is used to receive and identify the first sensing signal Stest_1 or the second sensing signal Stest_2, and send a corresponding door control instruction to the door controller 24 corresponding to the vehicle door. The door controller 24 executes a corresponding door control action based on the door control instruction.

[0047] The body controller 22 can be a control device such as a CPU, MCU, etc. that has signal processing and data calculation functions. The body controller 22 communicates with other electronic control devices in the vehicle, including the door controller 24, through various buses such as CAN, LIN, etc. The body controller 22 is used to send corresponding control instructions according to various status monitoring signals and action command signals, such as vehicle locking and unlocking, lighting control, seat control, etc. The door controller is used to monitor the door status and control the door action, including door locking and unlocking, etc. The door controller is also used to manage door-related functions such as windows and rearview mirrors.

[0048] Specifically, the body controller 22 is used to send a pop-up control instruction to the door controller 24 based on the first sensing signal Stest_1, and the door controller 24 controls the motor corresponding to the car door to drive the car door handle to pop out based on the pop-up control instruction.

[0049] The body controller 22 is further configured to send a door lock release instruction to the door controller 24 based on the second sensing signal Stest_2. The door controller 24 controls the door lock of the vehicle door to unlock based on the door lock release instruction so as to open the door.

[0050] In actual use, when the entire vehicle is locked, the door handle of the car door is in a hidden state. Only the first sensing area 121 on the outside of the door handle can be touched by the user. After the user touches the first sensing area 121, the first sensing area 121 generates a first touch signal Sto_1 and sends it to the signal detection circuit 16, and the signal detection circuit 16 outputs the corresponding first sensing signal Stest_1. After receiving the first sensing signal Stest_1, the body controller 22 recognizes that the first sensing area 121 is touched, and sends a pop-up control instruction to the door controller 24. The door controller 24 controls the motor corresponding to the car door to drive the car door handle to pop out, and unlocks the entire vehicle at the same time.

[0051] After the car door handle pops out, the user can touch the second sensing area 122. After the user touches the second sensing area 122, the first sensing area 122 generates a second touch signal Sto_2 and sends it to the signal detection circuit 16, and the signal detection circuit 16 outputs a corresponding second sensing signal Stest_2. After receiving the second sensing signal Stest_2, the body controller 22 recognizes that the second sensing area 122 is touched, and sends a door lock release instruction to the door controller 24, and the door controller 24 controls the door lock of the car door to unlock and open the door.

[0052] The car door control circuit provided in this embodiment identifies the sensing signals corresponding to different touch positions through the body controller, thereby distinguishing the door control functions of different touch positions; sends door control instructions to the corresponding door controller according to the door control functions corresponding to different touch positions, controls the door controller to execute the corresponding door control actions, improves the safety of door opening control, and improves the user's operating experience.

[0053] In some embodiments, Figure 3 is a connection diagram of a signal detection circuit in some embodiments of the present application, such as Figure 3 As shown, the signal detection circuit 16 includes a detection circuit 161 and a switch circuit 162 connected to each other. The detection circuit 161 is connected to the first sensing area 121 and the second sensing area 122 respectively; the detection circuit 161 outputs a first detection signal Sdet_1 according to the first touch signal Sto_1; or outputs a second detection signal Sdet_2 according to the second touch signal Sto_2; the switch circuit 162 converts the first detection signal Sdet_1 or the second detection signal Sdet_2 into a corresponding first sensing signal Stest_1 or a second sensing signal Stest_2.

[0054] Specifically, the detection circuit 161 can be a device with a signal processing function such as a CPU, an MCU, or a single chip microcomputer. The device can receive the first touch signal Sto_1 and the second touch signal Sto_2 through different input ports, respectively. The device can send the first detection signal Sdet_1 and the second detection signal Sdet_2 to the switch circuit 162 through the same output port.

[0055] The detection circuit 161 determines whether a trigger requirement is met according to the signal amplitude of the first touch signal Sto_1 or the second touch signal Sto_2, where the trigger requirement may be a preset amplitude threshold. If the trigger requirement is met, the first detection signal Sdet_1 or the second detection signal Sdet_2 corresponding to the first touch signal Sto_1 or the second touch signal Sto_2 is output.

[0056] Specifically, the first detection signal Sdet_1 and the second detection signal Sdet_2 may be PWM signals, the level of which is determined based on the level of the output signal of the detection circuit 161. The detection circuit 161 may determine whether the touch position is on the outside or inside of the car door handle according to the first touch signal Sto_1 or the second touch signal Sto_2, and generate the first detection signal Sdet_1 or the second detection signal Sdet_2 with a preset duty cycle or a preset signal feature, and the preset duty cycle or the preset signal feature corresponds to the touch position.

[0057] The switch circuit 162 converts the first detection signal Sdet_1 or the second detection signal Sdet_2 into a corresponding first sensing signal Stest_1 or a second sensing signal Stest_2, so as to be suitable for processing by the control unit 20. Specifically, the signal conversion can be performed by a level conversion circuit.

[0058] The control unit 20 may determine whether the touch position is on the outside or inside of the car door handle according to the duty cycle or signal characteristics of the first sensing signal Stest_1 or the second sensing signal Stest_2 .

[0059] The control circuit of the automobile door provided in this embodiment confirms the touch signals of the first sensing area and the second sensing area through the detection circuit, thereby reducing the door opening control action caused by the false touch; sends the touch signals generated by the first sensing area and the second sensing area to the switch circuit through the same signal line, thereby saving circuit and device resources; converts the touch signals corresponding to the two sensing areas into PWM signals with different signal characteristics, thereby facilitating the distinction of the control unit; and performs level conversion and signal amplification on the PWM signal through the switch circuit, thereby improving the signal transmission capability and facilitating subsequent processing.

[0060] In a further embodiment, Figure 4 is a circuit connection diagram of a switch circuit of some embodiments of the present application, such as Figure 4 As shown, the switch circuit 162 includes a controllable switch K1, a control end of the controllable switch K1 receives a first detection signal Sdet_1 or a second detection signal Sdet_2, a first end of the controllable switch K1 outputs a corresponding first sensing signal Stest_1 or a second sensing signal Stest_2, and a second end of the controllable switch K1 is grounded.

[0061] When the first detection signal Sdet_1 or the second detection signal Sdet_2 is at a high level, the controllable switch K1 is turned on, and the first sensing signal Stest_1 or the second sensing signal Stest_2 is grounded through the resistor R1, so it is at a low level; when the first detection signal Sdet_1 or the second detection signal Sdet_2 is at a low level, the controllable switch K1 is turned off, and the voltage of the first sensing signal Stest_1 or the second sensing signal Stest_2 is provided by the power supply VCC1, so it is at a high level. Therefore, when the first detection signal Sdet_1 or the second detection signal Sdet_2 is a PWM signal, the corresponding first sensing signal Stest_1 or the second sensing signal Stest_2 is also a PWM signal, and the level state of the first sensing signal Stest_1 or the second sensing signal Stest_2 is opposite to the level state of the corresponding detection signal Sdet_1 or Sdet_2.

[0062] Furthermore, if Figure 4As shown, the switch circuit 162 further includes a resistor R1 and a capacitor C1, one end of the resistor R1 is connected to the first end of the controllable switch K1, the other end of the resistor R1 is connected to one end of the capacitor C1 and the control unit 20, and the other end of the capacitor C1 is grounded.

[0063] The resistor R1 plays a role of voltage division in the circuit, and the capacitor C1 filters the first sensing signal Stest_1 or the second sensing signal Stest_2.

[0064] In some embodiments, Figure 5 Schematic diagram of the connection of the signal detection circuit of some other embodiments of the present application, such as Figure 5 As shown, the signal detection circuit further includes a power supply circuit 163 , which is used to supply power to the detection circuit 161 and provide a first pull-up power source VCC1 to the first sensing signal Stest_1 or the second sensing signal Stest_2 .

[0065] The power supply circuit 163 may be a DC voltage regulator, and the power supply voltage supplied to the detection circuit 161 may be different from the voltage of the first pull-up power supply VCC1 to achieve level conversion of the first sensing signal Stest_1, the second sensing signal Stest_2 and the first detection signal Sdet_1, the second detection signal Sdet_2.

[0066] In some embodiments, Figure 6 Schematic diagram of the connection between the signal detection circuit and the control unit in some embodiments of the present application, such as Figure 6 As shown, the control unit 20 includes a resistor R2 and a capacitor C2, one end of the resistor R2 is connected to the second pull-up power supply terminal VCC2, the other end of the resistor R2 is connected to the input end of the first sensing signal Stest_1 or the second sensing signal Stest_2 and one end of the capacitor C2 and the body controller 22, and the other end of the capacitor C2 is grounded.

[0067] The resistor R2 is a pull-up resistor of the first sensing signal Stest_1 or the second sensing signal Stest_2 , and the capacitor C3 performs input filtering on the first sensing signal Stest_1 or the second sensing signal Stest_2 .

[0068] Some embodiments of the present application further provide a car door handle, which includes the touch detection circuit in the above embodiment.

[0069] The car door handle of this embodiment expands the touch sensing range of the touch sensor by providing a first sensing area on the outside of the car door handle and a second sensing area on the inside of the car door handle, and distinguishes the car door control functions corresponding to different sensing areas; the signal detection circuit receives the first touch signal or the second touch signal corresponding to the two sensing areas, and outputs the corresponding sensing signal, so that the door opening process is controlled by the user touching different areas of the car door handle, without the need to control the opening of the car door by pulling the door or using a micro switch, thereby improving the user's operating experience.

[0070] Some embodiments of the present application further provide an electric vehicle, which includes the control circuit of the vehicle door in the above embodiment.

[0071] The electric vehicle provided by the present embodiment converts the two touch signals generated by the two sensing areas into two corresponding sensing signals through the control circuit of the car door, and transmits them to the control unit through the same signal line instead of transmitting them separately, thereby reducing the number of wiring harnesses of the control unit and reducing the wiring difficulty of the control unit. The control unit obtains the sensing signals corresponding to different touch positions and identifies the sensing signals to distinguish the door control functions of different touch positions. According to the door control functions corresponding to different touch positions, the door control instructions are sent to the corresponding door controller, and the door controller is controlled to execute the corresponding door control action, thereby improving the safety of the door opening control and the user's operating experience.

[0072] The technical features of the above embodiments may be combined arbitrarily. To make the description concise, not all possible combinations of the technical features in the above embodiments are described. However, as long as there is no contradiction in the combination of these technical features, they should be considered to be within the scope of this specification.

[0073] The above-mentioned embodiments only express several implementation methods of the present application, and the descriptions thereof are relatively specific and detailed, but they cannot be understood as limiting the scope of the patent. It should be pointed out that, for a person of ordinary skill in the art, several variations and improvements can be made without departing from the concept of the present application, and these all belong to the protection scope of the present application. Therefore, the protection scope of the patent of the present application shall be subject to the attached claims.

Claims

1. A control circuit for a car door, characterized in that: The control circuit includes a touch detection circuit and a control unit connected to the touch detection circuit; The touch detection circuit includes a touch sensor and a signal detection circuit; the touch sensor includes a first sensing area arranged on the outside of the automobile door handle and a second sensing area arranged on the inside of the automobile door handle; The signal detection circuit is connected to the touch sensor, and is used to receive a first touch signal corresponding to the first sensing area or a second touch signal corresponding to the second sensing area, and output a first sensing signal based on the first touch signal or output a second sensing signal based on the second touch signal; The control unit is used to control the pop-up of the vehicle door handle and unlocking of the entire vehicle based on the first sensing signal, or to control the unlocking of the door lock of the vehicle door based on the second sensing signal to open the vehicle door.

2. The circuit according to claim 1, characterized in that The signal detection circuit includes a detection circuit and a switch circuit connected to each other, and the detection circuit is connected to the touch sensor; The detection circuit outputs a first detection signal according to the first touch signal; or outputs a second detection signal according to the second touch signal; The switch circuit converts the first detection signal or the second detection signal into a corresponding first sensing signal or a corresponding second sensing signal.

3. The circuit according to claim 2, characterized in that The switch circuit includes a controllable switch, a control end of the controllable switch receives the first detection signal or the second detection signal, a first end of the controllable switch outputs a corresponding first sensing signal or a corresponding second sensing signal, and a second end of the controllable switch is grounded.

4. The circuit according to claim 3, characterized in that The switch circuit also includes a resistor R1 and a capacitor C1. One end of the resistor R1 is connected to the first end of the controllable switch, the other end of the resistor R1 is connected to one end of the capacitor C1 and the control unit, and the other end of the capacitor C1 is grounded.

5. The circuit according to claim 2, characterized in that The signal detection circuit also includes a power supply circuit. The power supply circuit is used to supply power to the detection circuit and provide a first pull-up power supply to the first sensing signal or the second sensing signal.

6. The circuit according to claim 1, characterized in that The control unit includes a resistor R2 and a capacitor C2. One end of the resistor R2 is connected to the second pull-up power supply end, the other end of the resistor R2 is connected to the input end of the first sensing signal or the second sensing signal and one end of the capacitor C2, and the other end of the capacitor C2 is grounded.

7. The circuit according to claim 1, characterized in that The control unit includes a vehicle body controller and a door controller of the vehicle door, The signal detection circuit is connected to the vehicle body controller, and the vehicle body controller is connected to the door controller; The body controller is used to receive and identify the first sensing signal and the second sensing signal, and send a corresponding door control instruction to the door controller; the door controller is used to execute a corresponding door control action based on the door control instruction.

8. The circuit according to claim 7, characterized in that The body controller is used to send a pop-up control instruction to the door controller based on the first sensing signal, and the door controller controls the motor corresponding to the car door to drive the car door handle to pop out based on the pop-up control instruction; The vehicle body controller is further configured to send a door lock release instruction to the vehicle door controller based on the second sensing signal, and the vehicle door controller controls the door lock of the vehicle door to unlock based on the door lock release instruction so as to open the vehicle door.

9. A car door handle, characterized in that: The automobile door handle includes a touch detection circuit, and the touch detection circuit includes a touch sensor and a signal detection circuit; wherein, The touch sensor comprises a first sensing area arranged on the outside of the automobile door handle and a second sensing area arranged on the inside of the automobile door handle; The signal detection circuit is connected to the touch sensor, and is used to receive a first touch signal corresponding to the first sensing area or a second touch signal corresponding to the second sensing area, and output a first sensing signal based on the first touch signal, or output a second sensing signal based on the second touch signal.

10. An electric vehicle, characterized in that: The electric vehicle comprises a vehicle door control circuit as claimed in any one of claims 1 to 8.

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