A mechanical-by-wire dual-purpose drive system for low-speed electric vehicles

Abstract

The present invention relates to the field of low-speed electric vehicle drive systems, and discloses a mechanical-by-wire dual-purpose drive system for a low-speed electric vehicle, comprising: an accelerator pedal receives a stepping depth and generates an accelerator pedal signal, which is sent to a printed circuit board. The printed circuit board receives the accelerator pedal signal and determines whether a control-by-wire mode command is received. If the control-by-wire mode command is not received or the current vehicle state is determined to be a non-controllable drive-by-wire state after receiving the control-by-wire mode command, the vehicle enters a mechanical drive mode and sends the accelerator pedal signal to a drive motor controller. If a control-by-wire mode command is received and the current vehicle state is determined to be a control-by-wire drive-able state, the vehicle enters a control-by-wire drive mode, converts the control-by-wire mode command into a control-by-wire analog voltage signal, and sends it to a drive motor controller. The drive motor controller receives the accelerator pedal signal or the control-by-wire analog voltage signal, and controls the drive motor according to the signal. Thus, a mechanical-by-wire dual-purpose drive system for a low-speed electric vehicle is realized.

Description

Technical Field

[0001] The present invention relates to the field of low-speed electric vehicle drive systems, and in particular to a mechanical-by-wire dual-purpose drive system for a low-speed electric vehicle. Background Art

[0002] With the continuous advancement of intelligent connected vehicle technology, various high-level ADAS (Advanced Driver Assistance System) functions and autonomous driving technology of vehicles are becoming increasingly mature, and intelligence has penetrated into all aspects of people's daily lives. The key technologies for developing intelligent connected vehicles cover multiple fields, including environmental perception, intelligent decision-making, control execution, V2X communication, cloud platform and big data, and information security. Among them, control execution technology integrates advanced sensors, controllers, actuators and other equipment, combined with modern communication and network technologies, to achieve precise control and operation of vehicles.

[0003] At the same time, with the acceleration of urbanization, the demand for low-speed electric vehicles in short-distance travel and shared travel is growing. Especially in some large cities, low-speed electric vehicles have gradually become the first choice for residents' short-distance travel due to their flexibility and environmental protection. In addition, the public's attention to personal travel safety has further promoted the increase in the market demand for low-speed electric vehicles.

[0004] The drive-by-wire system replaces traditional mechanical connections with electronic signals to achieve precise control of various vehicle control systems. This system usually includes functions such as wire-controlled steering, wire-controlled braking and wire-controlled driving. The advantages of the wire-controlled driving system are its high precision, high response speed and flexibility, which can provide a better control experience for intelligent connected vehicles.

[0005] The chassis wire control system of intelligent networked vehicles is an important part of the control execution technology. The premise for achieving high-level autonomous driving of vehicles is the support of the wire control system, including wire control steering system, wire control braking system and wire control drive system. With the continuous advancement of artificial intelligence and intelligent network technology, low-speed electric vehicles will also be able to complete more complex tasks, and the market application prospects will be further expanded.

[0006] Drive-by-wire systems are increasingly being used in low-speed electric vehicles, especially in shared mobility and short-distance urban travel scenarios. Many electric scooters, electric bicycles, and small electric vehicles are beginning to adopt drive-by-wire technology to improve handling and safety. For example, some shared electric vehicle platforms have begun testing drive-by-wire steering and braking systems to improve user experience. These innovations not only improve the convenience of travel, but also lay the foundation for future intelligent transportation systems.

[0007] Existing low-speed electric vehicles, especially in the modification of the drive system, often have the following technical problems: First, in the traditional manual driving mode, the accelerator pedal has a very short travel, which is limited in accuracy and response speed, making it difficult to meet the requirements of advanced driver assistance systems and autonomous driving functions; Second, an automatic driving system that completely eliminates the accelerator pedal has no other way to control the vehicle when a malfunction occurs, resulting in the vehicle being unable to move, which can pose a safety hazard, especially during driving. Third, the drive-by-wire system of intelligent connected passenger vehicles is costly and requires complex matching of the vehicle controller. Replacement of any of the vehicle's multiple electronic control units requires re-matching, resulting in a long vehicle development cycle and increased costs. Summary of the invention

[0008] The summary of the invention is used to introduce concepts in a brief form, which will be described in detail in the detailed implementation section below. The summary of the invention is not intended to identify the key features or essential features of the technical solution claimed for protection, nor is it intended to limit the scope of the technical solution claimed for protection.

[0009] The present invention proposes a mechanical-by-wire dual-purpose drive system for a low-speed electric vehicle to solve one or more of the technical problems mentioned in the above background technology section.

[0010] The present invention provides a mechanical-by-wire dual-purpose driving system for a low-speed electric vehicle, comprising: an accelerator pedal, the accelerator pedal is used to receive pedaling information, the pedaling information includes pedaling depth; according to the pedaling depth, an accelerator pedal signal is generated; the accelerator pedal signal is sent to a printed circuit board; The printed circuit board is used to receive an accelerator pedal signal and determine whether a control-by-wire mode command is received; if the control-by-wire mode command is not received, the vehicle's drive system enters a mechanical drive mode and sends the accelerator pedal signal to the drive motor controller; if the control-by-wire mode command is received, it is determined whether the current state of the vehicle belongs to a control-by-wire drive state; if it does not belong to the control-by-wire drive state, the vehicle's drive system enters a mechanical drive mode and sends the accelerator pedal signal to the drive motor controller; if it belongs to the control-by-wire drive state, the vehicle's drive system enters a control-by-wire drive mode, converts the control-by-wire mode command into a control-by-wire analog voltage signal, and sends the control-by-wire analog voltage signal to the drive motor controller; The drive motor controller is used to receive the accelerator pedal signal or the wire-controlled analog voltage signal; and control the drive motor according to the accelerator pedal signal or the wire-controlled analog voltage signal.

[0011] Optionally, a mechanical-by-wire dual-purpose drive system for a low-speed electric vehicle further includes: The vehicle-mounted computing device is used to obtain road environment information; generate a wire control mode command based on the road environment information and a preset vehicle control strategy, wherein the wire control mode command includes a target vehicle speed.

[0012] Optionally, the printed circuit board includes a relay switching circuit, a DA output circuit, an AD sampling circuit, a CAN communication module, a microcontroller and a power supply module, wherein the relay switching circuit is used to execute the operation of switching the mechanical drive mode to the wire-controlled drive mode; the DA output circuit is used to convert the wire-controlled mode command into a wire-controlled analog voltage signal, wherein the wire-controlled mode command is a digital signal; the AD sampling circuit is responsible for sampling the feedback signal of the sensor corresponding to the drive system and the working status of the printed circuit board; the microcontroller is used to control the operation of the printed circuit board; the CAN communication module is used to communicate with the vehicle-mounted computing device; and the power supply module is used to power the printed circuit board.

[0013] Optionally, the printed circuit board includes a relay switching circuit, a PWM control circuit, an AD sampling circuit, a CAN communication module, a microcontroller and a power supply module.

[0014] Optionally, the printed circuit board includes a photocoupler, a DA output circuit, an AD sampling circuit, a CAN communication module, a microcontroller and a power supply module.

[0015] Optionally, the printed circuit board includes a contactor, a DA output circuit, an AD sampling circuit, a CAN communication module, a microcontroller and a power supply module.

[0016] Optionally, a microcontroller is used to perform the following steps: During the power-on initialization process, the relay switching circuit is switched to the initial state, and the output value of the DA output circuit is cleared to zero.

[0017] Optionally, the microcontroller is also used to perform the following steps: After entering the drive-by-wire mode, the accelerator pedal signal between the accelerator pedal and the drive motor controller is disconnected; the drive-by-wire mode command is switched to a drive-by-wire analog voltage signal through the DA output circuit, and the drive-by-wire analog voltage signal is sent to the drive motor controller through the relay switching circuit.

[0018] The present invention has the following beneficial effects: 1. Improved control accuracy and response speed. Specifically, by introducing an additional printed circuit board and adding a drive-by-wire mode, the problem of insufficient accuracy and response speed caused by the short travel of the traditional accelerator pedal can be overcome, achieving higher control accuracy and faster dynamic response, meeting the requirements of advanced driver assistance systems and autonomous driving functions.

[0019] 2. Enhanced safety and fault response capabilities. Specifically, on the basis of retaining the mechanical drive mode as a backup control method, combined with drive-by-wire, when a vehicle fails during drive-by-wire, the vehicle's drive system can be switched to mechanical drive without any intervention of the installed printed circuit board, ensuring that the vehicle can still move safely under fault conditions and reducing safety hazards.

[0020] 3. Reduced costs and shortened development cycles. Specifically, by adding a printed circuit board to the original mechanical mode, the wire-controlled drive system for low-speed electric vehicles is simplified, the high cost and complex structure of the supporting system for intelligent networked passenger vehicles are abandoned, and the high dependence on the vehicle controller is avoided, thereby reducing development costs and shortening the development cycle. BRIEF DESCRIPTION OF THE DRAWINGS

[0021] The above and other features, advantages and aspects of the embodiments of the present invention will become more apparent with reference to the following detailed description in conjunction with the accompanying drawings. Throughout the accompanying drawings, the same or similar reference numerals represent the same or similar elements. It should be understood that the drawings are schematic and that components and elements are not necessarily drawn to scale.

[0022] Figure 1 is an exemplary structural schematic diagram of a mechanical-by-wire dual-purpose drive system for a low-speed electric vehicle of the present invention; Figure 2 It is a connection relationship diagram of a mechanical-by-wire dual-purpose drive system of a low-speed electric vehicle of the present invention; Figure 3 It is another connection relationship diagram of a mechanical-by-wire dual-purpose drive system of a low-speed electric vehicle of the present invention. DETAILED DESCRIPTION

[0023] The present invention will be described in more detail below with reference to the accompanying drawings. Although certain embodiments of the present invention are shown in the accompanying drawings, it should be understood that the present invention can be implemented in various forms and should not be construed as being limited to the embodiments set forth herein. On the contrary, these embodiments are provided to provide a more thorough and complete understanding of the present invention. It should be understood that the drawings and embodiments of the present invention are only for exemplary purposes and are not intended to limit the scope of protection of the present invention.

[0024] It should also be noted that, for ease of description, only the parts related to the invention are shown in the drawings. In the absence of conflict, the embodiments of the present invention and the features in the embodiments can be combined with each other.

[0025] It should be noted that the concepts such as "first" and "second" mentioned in the present invention are only used to distinguish different devices, modules or units, and are not used to limit the order or interdependence of the functions performed by these devices, modules or units.

[0026] It should be noted that the modifications of "one" and "plurality" mentioned in the present invention are illustrative rather than restrictive, and those skilled in the art should understand that, unless otherwise clearly indicated in the context, it should be understood as "one or more".

[0027] The names of the messages or information exchanged between multiple devices of the present invention are only for illustrative purposes, and are not used to limit the scope of these messages or information.

[0028] The present invention will be described in detail below with reference to the accompanying drawings and in conjunction with embodiments.

[0029] like Figure 1 As shown, a mechanical-by-wire dual-purpose driving system of a low-speed electric vehicle of the present invention is shown, comprising the following devices: an accelerator pedal 101 , a printed circuit board 102 , and a driving motor controller 103 .

[0030] Among them, the accelerator pedal 101 is used to receive the pedaling information, the pedaling information includes the pedaling depth; generate the accelerator pedal signal according to the pedaling depth; and send the accelerator pedal signal to the printed circuit board 102.

[0031] In some embodiments, the accelerator pedal 101 has an integrated sensor, such as a potentiometer sensor, and a communication connection is established with the sensor to receive the stepping information. In practice, the potentiometer sensor uses a sliding resistor to sense angle changes. When the driver steps on the pedal, the slider moves on the potentiometer, and the output voltage signal is proportional to the stepping depth. The sensor converts the physical quantity of the sensed stepping depth into an analog signal. Among them, the accelerator pedal 101 is an input device of the vehicle control system. The user controls the vehicle power output by stepping on the accelerator pedal 101. The accelerator pedal 101 is used to sense the driver's stepping action and convert it into an electrical signal. The stepping information refers to the data generated by the physical force applied by the driver to the accelerator pedal 101 through the foot, including the stepping depth. The stepping depth refers to the degree to which the accelerator pedal 101 is stepped on, which is usually measured by an angle sensor or a displacement sensor. The stepping depth is proportional to the output power of the drive motor and is a key parameter that determines the acceleration strength of the vehicle. The accelerator pedal signal refers to the output signal generated by the accelerator pedal, which is usually an analog voltage signal representing the quantized value of the stepping depth. The accelerator pedal 101 transmits an accelerator pedal signal to the printed circuit board 102 through a signal line.

[0032] The printed circuit board 102 is used to receive the accelerator pedal signal and determine whether a wire control mode command is received; if the wire control mode command is not received, the vehicle's drive system enters a mechanical drive mode and sends the accelerator pedal signal to the drive motor controller; if the wire control mode command is received, it is determined whether the current state of the vehicle belongs to a wire control drive state; if it does not belong to the wire control drive state, the vehicle's drive system enters a mechanical drive mode and sends the accelerator pedal signal to the drive motor controller; if it belongs to the wire control drive state, the vehicle's drive system enters a wire control drive mode, converts the wire control mode command into a wire control analog voltage signal, and sends the wire control analog voltage signal to the drive motor controller 103.

[0033] In some embodiments, the printed circuit board 102 is the electronic control center of the drive system, as an example, Figure 2As shown, the printed circuit board 102 includes a relay switching circuit, a DA output circuit, an AD sampling circuit, a CAN communication module, a microcontroller and a power supply module (not shown in the figure). The printed circuit board 102 is connected to the accelerator pedal through a signal line, thereby receiving the accelerator pedal signal. The communication module of the printed circuit board receives the wire control mode command from other wire control units, and the microcontroller parses the data packet of the wire control mode command to identify whether it contains the flag corresponding to the wire control mode. Among them, the other wire control units are vehicle-mounted computing devices. The wire control mode command comes from the digital control command of the vehicle-mounted computing device, which is used to determine the driving mode of the vehicle's drive system and provide a target vehicle speed. Among them, the driving mode includes a mechanical driving mode or a wire control driving mode. The target vehicle speed refers to the expected vehicle speed or target speed set in the vehicle control system. If the flag corresponding to the wire control mode is not identified, the vehicle's drive system enters the mechanical driving mode. And the accelerator pedal signal is sent to the drive motor controller 103. Among them, the mechanical driving mode is a traditional vehicle driving mode. The driver's physical operation is directly transmitted to the drive motor controller through the signal link to realize the vehicle power output. It is suitable for the case where the wire control command is not received or the wire control conditions are not met. The drive system refers to the system responsible for providing and controlling power. If the sign corresponding to the wire control mode is identified, the microcontroller in the printed circuit board 102 performs logical judgment by collecting feedback signals to determine whether it belongs to the wire control drive state. Among them, the feedback signal can be vehicle speed, gear state, sensor state, etc. The wire control drive state means that the current working conditions of the vehicle meet the requirements for entering the wire control drive mode, and these conditions are usually related to the vehicle's operating environment, hardware status, and control system configuration. If any condition in the current working conditions of the vehicle does not meet the requirements for entering the wire control drive mode (such as gear error, speed overrun, etc.), it is determined that it does not belong to the wire control drive state, and the vehicle's drive system enters the mechanical drive mode, and sends the accelerator pedal signal to the drive motor controller 103. If the current working conditions of the vehicle meet the requirements for entering the wire control drive mode, the vehicle's drive system enters the wire control drive mode. Among them, the wire control drive mode refers to the realization of vehicle power control through electronic signals, reducing the dependence on physical signal links, and is suitable for automatic driving or remote control scenarios. And the wire control mode command is converted into a wire control analog voltage signal through the DA output circuit. The wire-controlled analog voltage signal refers to an analog voltage signal generated by converting a digital signal through the printed circuit board 102 and is used as a control input of the drive motor controller. The wire-controlled analog voltage signal is transmitted to the drive motor controller 103 through a signal line.

[0034] The drive motor controller 103 is used to receive an accelerator pedal signal or a wire-controlled analog voltage signal; and control the drive motor according to the accelerator pedal signal or the wire-controlled analog voltage signal.

[0035] In some embodiments, the drive motor controller 103 is one of the core components in the vehicle drive system, and its main function is to receive a control signal from an accelerator pedal signal or a wire-controlled analog voltage signal. On this basis, the drive motor controller 103 establishes a communication connection with the printed circuit board 102, thereby receiving the accelerator pedal signal or the wire-controlled analog voltage signal, and controls the operation of the drive motor according to the accelerator pedal signal or the wire-controlled analog voltage signal. Among them, the drive motor is an electric drive device in the vehicle, usually a DC motor or an AC motor, which is used to provide power output for the vehicle.

[0036] A mechanical-by-wire dual-purpose drive system for a low-speed electric vehicle, further comprising: The vehicle-mounted computing device is used to obtain road environment information; generate a wire control mode command based on the road environment information and a preset vehicle control strategy, wherein the wire control mode command includes a target vehicle speed.

[0037] In some embodiments, the on-board computing device may be a computer, which is an electronic device installed in the vehicle and has computing and decision-making functions. The on-board computing device collects real-time data of the surrounding road environment through sensors, and the real-time data is transmitted to the on-board computing device through a communication interface. Among them, road environment information is data reflecting the road conditions around the vehicle. For example, obstacle locations, driving lanes, road signs, speed limit information, traffic light status, etc. The preset vehicle control strategy is a set of logical rules and algorithms pre-defined in the on-board computing device. On this basis, based on the road environment information and control strategy, the on-board computing device executes to determine the safe vehicle speed to avoid collision or speeding. The control-by-wire mode command includes a target vehicle speed. Among them, the target vehicle speed is the expected vehicle speed.

[0038] Among them, the printed circuit board 102 includes a relay switching circuit, a DA output circuit, an AD sampling circuit, a CAN communication module, a microcontroller and a power supply module, wherein the relay switching circuit is used to execute the operation of switching the mechanical drive mode to the wire-controlled drive mode; the DA output circuit is used to convert the wire-controlled mode command into a wire-controlled analog voltage signal, wherein the wire-controlled mode command is a digital signal; the AD sampling circuit is responsible for sampling the feedback signal of the sensor corresponding to the drive system and the working status of the printed circuit board; the microcontroller is used to control the operation of the printed circuit board; the CAN communication module is used to communicate with the on-board computing device; and the power supply module is used to power the printed circuit board.

[0039] In some embodiments, the relay switching circuit is an electronic switch that realizes the on-off switching of the circuit through the relay, switches the on-off state of the circuit by receiving the control signal of the microcontroller, and allows the accelerator pedal signal to be directly transmitted to the drive motor controller in the mechanical drive mode. In the wire drive mode, the path of the accelerator pedal signal is disconnected, and the signal path of the wire drive mode is enabled. The DA (Digital to Analog) output circuit is used to convert the digital signal into a corresponding analog voltage signal, and is used to convert the wire control mode command into a wire control analog voltage signal to drive the execution device. Among them, the digital signal refers to a signal whose independent variable is discrete and the dependent variable is also discrete. The independent variable of this signal is represented by an integer, and the dependent variable is represented by a number in a finite number. In a computer, the size of a digital signal is often represented by a finite binary number, for example, the common ones are binary "0" and "1". The AD sampling circuit is responsible for sampling the feedback signal of the sensor corresponding to the drive system and the working state of the printed circuit board. The AD sampling circuit receives the analog signal of the sensor and digitizes it through the ADC (Analog to Digital Converter) chip. Among them, the feedback signal is used to monitor the operating state of the drive motor. The working status of the printed circuit board includes the working voltage of the printed circuit board 102, whether the analog voltage signal output by the DA module is normal, etc. The microcontroller is the main controller of the printed circuit board 102 and the control core of the circuit board. It is internally integrated with software program code to control the operation of the entire printed circuit board 102. The CAN (Controller Area Network) communication module is a controller area network communication module used to transfer data between other control units of the vehicle. On the one hand, the CAN communication module receives control command information from the upper system, and on the other hand, it sends the status information of the vehicle drive system to the CAN bus. The power supply module is an electronic unit that provides a stable power supply for the circuit. It is used to power the printed circuit board 102 to ensure the normal operation of the printed circuit board 102 and its internal components.

[0040] Optionally, the printed circuit board 102 includes a relay switching circuit, a PWM control circuit, an AD sampling circuit, a CAN communication module, a microcontroller and a power supply module.

[0041] In some embodiments, the printed circuit board 102 includes a relay switching circuit, a PWM control circuit, an AD sampling circuit, a CAN communication module, a microcontroller, and a power supply module. Among them, the PWM (Pulse Width Modulation) control circuit is a technology that uses digital signals to control analog circuits. When the accelerator pedal signal is a digital signal, the PWM control circuit is selected. As an example, Figure 3As shown, the printed circuit board 102 includes a relay switching circuit, a PWM control circuit, an AD sampling circuit, a CAN communication module, a microcontroller and a power supply module (not shown in the figure).

[0042] Optionally, the printed circuit board 102 includes a photocoupler, a DA output circuit, an AD sampling circuit, a CAN communication module, a microcontroller and a power supply module.

[0043] In some embodiments, the printed circuit board 102 includes a photocoupler, a DA output circuit, an AD sampling circuit, a CAN communication module, a microcontroller, and a power supply module. The photocoupler is an electronic component that uses optical signals to isolate electrical signals and can replace a relay switching circuit for circuit switching.

[0044] Optionally, the printed circuit board 102 includes a contactor, a DA output circuit, an AD sampling circuit, a CAN communication module, a microcontroller and a power supply module.

[0045] In some embodiments, the printed circuit board 102 includes a contactor, a DA output circuit, an AD sampling circuit, a CAN communication module, a microcontroller, and a power supply module. The contactor is a switching device that realizes the on and off of the main circuit through a control circuit and can replace a relay switching circuit for circuit switching.

[0046] The microcontroller is used to perform the following steps: During the power-on initialization process, the relay switching circuit is switched to the initial state, and the output value of the DA output circuit is cleared to zero.

[0047] In some embodiments, power-on initialization refers to a series of initialization operations that the drive system automatically performs after the power is connected. The purpose is to ensure that the various modules of the drive system are in a predetermined initial state so as to perform subsequent normal operations. The microcontroller controls the relay switching circuit to switch the contacts of the relay to a preset initial position. The initial state refers to the mechanical drive mode. The output signal of the digital to analog conversion circuit is set to zero voltage. The output value refers to the output signal of the digital to analog conversion circuit. The reset is to prevent abnormal analog signals during the initialization process and ensure stable output.

[0048] The microcontroller is also used to perform the following steps: After entering the drive-by-wire mode, the accelerator pedal signal between the accelerator pedal and the drive motor controller is disconnected; the drive-by-wire mode command is switched to a drive-by-wire analog voltage signal through the DA output circuit, and the drive-by-wire analog voltage signal is sent to the drive motor controller through the relay switching circuit.

[0049] In some embodiments, after entering the drive-by-wire mode, the path of the accelerator pedal signal is disconnected through a relay switching circuit. The drive-by-wire mode command is output as a corresponding analog voltage signal through a DA output circuit according to the instruction. After the relay is switched, the drive-by-wire analog voltage signal is directly connected to the input terminal of the drive motor controller.

[0050] In these embodiments, the control accuracy and response speed are improved. Specifically, by introducing an additional printed circuit board and adding a wire-controlled drive mode, the problem of insufficient accuracy and response speed caused by the short stroke of the traditional throttle pedal can be overcome, and higher control accuracy and faster dynamic response can be achieved to meet the requirements of advanced driver assistance systems and automatic driving functions. Enhanced safety and fault response capabilities. Specifically, on the basis of retaining the mechanical drive mode as a backup control mode, combined with wire-controlled drive, when a vehicle fails during wire-controlled drive, the vehicle's drive system can be switched to mechanical drive and the additional printed circuit board does not intervene in any way, ensuring that the vehicle can still move safely under fault conditions, reducing safety hazards. Reduced costs and shortened development cycles. Specifically, by adding a printed circuit board in the original mechanical mode, the wire-controlled drive system for low-speed electric vehicles is simplified, the high cost and complex structure of the supporting system of intelligent networked passenger vehicles are abandoned, and the high dependence on the vehicle controller is avoided, thereby reducing development costs and shortening development cycles.

[0051] The above descriptions are only some preferred embodiments of the present invention and the explanation of the technical principles used. Those skilled in the art should understand that the scope of the invention involved in the present invention is not limited to the technical solutions formed by the specific combination of the above technical features, but also should cover other technical solutions formed by any combination of the above technical features or their equivalent features without departing from the above inventive concept. For example, the above features are replaced with the technical features with similar functions disclosed in the present invention (but not limited to) to form a technical solution.

Claims

1. A mechanical-by-wire dual-purpose drive system for a low-speed electric vehicle, characterized in that: include: An accelerator pedal, the accelerator pedal is used to receive pedaling information, the pedaling information includes pedaling depth; and generate an accelerator pedal signal according to the pedaling depth; sending the accelerator pedal signal to a printed circuit board; a printed circuit board, the printed circuit board being used to receive the accelerator pedal signal and determine whether a control-by-wire mode command is received; If the control-by-wire mode command is not received, the vehicle's drive system enters a mechanical drive mode and sends the accelerator pedal signal to the drive motor controller; If a wire control mode command is received, it is determined whether the current state of the vehicle belongs to a wire control drive state; if it does not belong to a wire control drive state, the vehicle's drive system enters a mechanical drive mode, and the accelerator pedal signal is sent to the drive motor controller; If the vehicle is in a drive-by-wire state, the vehicle's drive system enters a drive-by-wire mode, converts the drive-by-wire mode command into a drive-by-wire analog voltage signal, and sends the drive-by-wire analog voltage signal to a drive motor controller; A drive motor controller is used to receive the accelerator pedal signal or the wire-controlled analog voltage signal; and control the drive motor according to the accelerator pedal signal or the wire-controlled analog voltage signal.

2. The mechanical-by-wire dual-purpose drive system for a low-speed electric vehicle according to claim 1, characterized in that: Also includes: An on-vehicle computing device, the on-vehicle computing device is used to obtain road environment information; A drive-by-wire mode command is generated according to the road environment information and a preset vehicle control strategy, wherein the drive-by-wire mode command includes a target vehicle speed.

3. The mechanical-by-wire dual-purpose drive system for a low-speed electric vehicle according to claim 2, characterized in that: The printed circuit board includes a relay switching circuit, a DA output circuit, an AD sampling circuit, a CAN communication module, a microcontroller and a power supply module, wherein the relay switching circuit is used to execute the operation of switching the mechanical drive mode to the wire-controlled drive mode; the DA output circuit is used to convert the wire-controlled mode command into a wire-controlled analog voltage signal, wherein the wire-controlled mode command is a digital signal; the AD sampling circuit is responsible for sampling the feedback signal of the sensor corresponding to the drive system and the working status of the printed circuit board; the microcontroller is used to control the operation of the printed circuit board; the CAN communication module is used to communicate with the vehicle-mounted computing device; and the power supply module is used to supply power to the printed circuit board.

4. The mechanical-by-wire dual-purpose drive system for a low-speed electric vehicle according to claim 1, characterized in that: The printed circuit board comprises a relay switching circuit, a PWM control circuit, an AD sampling circuit, a CAN communication module, a microcontroller and a power supply module.

5. The mechanical-by-wire dual-purpose drive system for a low-speed electric vehicle according to claim 1, characterized in that: The printed circuit board comprises a photoelectric coupler, a DA output circuit, an AD sampling circuit, a CAN communication module, a microcontroller and a power supply module.

6. The mechanical-by-wire dual-purpose drive system for a low-speed electric vehicle according to claim 1, characterized in that: The printed circuit board comprises a contactor, a DA output circuit, an AD sampling circuit, a CAN communication module, a microcontroller and a power supply module.

7. The mechanical-by-wire dual-purpose drive system for a low-speed electric vehicle according to claim 3, characterized in that: The microcontroller is used to perform the following steps: During the power-on initialization process, the relay switching circuit is switched to an initial state, and the output value of the DA output circuit is cleared.

8. The mechanical-by-wire dual-purpose drive system for a low-speed electric vehicle according to claim 7, characterized in that: The microcontroller is also used to perform the following steps: After entering the wire-controlled drive mode, the accelerator pedal signal between the accelerator pedal and the drive motor controller is disconnected; the wire-controlled mode command is switched to the wire-controlled analog voltage signal through the DA output circuit, and the wire-controlled analog voltage signal is sent to the drive motor controller through the relay switching circuit.

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