阅读说明：本技术 一种电动教练车遥控制动的系统 (Remote control braking system of electric learner-driven vehicle ) 是由 王建波 于 2021-07-30 设计创作，主要内容包括：本发明公开一种电动教练车遥控制动的系统,包括：无线遥控器,无线电接收模块,整车控制器,电机；无线遥控器通过无线电波发送制动执行指令给无线电接收模块；无线电接收模块接收到制动指令时自动控制无线电接收模块上的继电器吸合：当继电器吸合时,即输出12V电压,继电器断开时即开路；整车控制器通过I/O口接收到继电器输出的12V电压信息,并检测到12V电压时,向电机发出指令,通过电机制动力控制车辆制动。本发明通过遥控控制实现车辆制动,尤其适合自动档电动教练车在科目二的场地教学中使用。该系统实现教练遥控干预学员不当操作,极大的降低了教练劳动高强度,改善了酷暑曝晒的工作环境,经济便捷。(The invention discloses a remote control braking system of an electric instruction car, which comprises: the system comprises a wireless remote controller, a wireless receiving module, a vehicle control unit and a motor; the wireless remote controller sends a braking execution instruction to the radio receiving module through radio waves; when the radio receiving module receives a braking instruction, the radio receiving module automatically controls the relay on the radio receiving module to suck: when the relay is switched on, the voltage of 12V is output, and when the relay is switched off, the relay is switched off; the vehicle control unit receives 12V voltage information output by the relay through the I/O port, and sends an instruction to the motor when detecting 12V voltage, and the vehicle braking is controlled through the motor braking force. The invention realizes the braking of the vehicle through remote control, and is particularly suitable for the automatic-gear electric learner-driven vehicle to be used in the field teaching of subject two. The system realizes remote control intervention of the coach on improper operation of the student, greatly reduces the labor intensity of the coach, improves the working environment of sunstroke and solarization, and is economical and convenient.)

1. A system for remotely controlling and braking an electric instruction car is characterized by comprising: the system comprises a wireless remote controller, a wireless receiving module, a vehicle control unit and a motor;

the wireless remote controller sends a braking execution instruction to the radio receiving module through radio waves;

when the radio receiving module receives a braking instruction, the radio receiving module automatically controls the relay on the radio receiving module to suck: when the relay is switched on, the voltage of 12V is output, and when the relay is switched off, the relay is switched off;

the vehicle control unit receives 12V voltage information output by the relay through the I/O port, and sends an instruction to the motor when detecting 12V voltage, and the vehicle braking is controlled through the motor braking force.

2. The system for remotely controlling the brake of an electric learner-driven vehicle according to claim 1, wherein: the vehicle instrument is also included; when the vehicle is controlled to brake, the vehicle control unit simultaneously sends an external control information frame to the instrument, and the vehicle instrument warns students.

3. The system for remotely controlling the brake of an electric learner-driven vehicle according to claim 1, wherein: the method for controlling the motor brake by the vehicle control unit comprises the following steps:

s1, whether a 12V voltage input signal is received or not, and the next step is yes; otherwise, quitting;

s2, whether the vehicle is Ready and whether the gear is D gear or R gear, yes, and the next step; otherwise, quitting;

s3, whether the absolute value of the vehicle speed is less than or equal to 1km/h,

the method comprises the following steps: the vehicle control unit sends a motor rotating speed control mode instruction to control the rotating speed target of the motor to be 0, and the next step is carried out;

otherwise: the vehicle control unit sends a torque control mode instruction of forced speed reduction, the motor executes the torque instruction of the vehicle control unit, and the next step is carried out;

s4, whether the 12V voltage input signal disappears, if yes, exiting; otherwise, S3 is repeated.

4. The system for remotely controlling the brake of an electric learner-driven vehicle according to claim 3, wherein: the torque calculation method comprises the following steps: when the vehicle speed is positive, the brake torque is maximally output from the minimum torque allowed by the battery system, the minimum torque allowed by the motor system and the minimum torque allowed by the temperature control system; when the vehicle speed is negative, the driving torque is output to the minimum of the maximum torque allowed by the battery system, the maximum torque allowed by the motor system and the maximum torque allowed by the temperature control system.

Technical Field

The invention belongs to a brake control mode of an electric learner-driven vehicle, and particularly relates to a remote control brake system of the electric learner-driven vehicle.

Background

At present, a coach in a driving school mainly corrects the driving behavior of a student through braking, the coach needs to accompany the seat in a copilot at any time, the working environment of sweltering and insolation is uncomfortable, and the work load of the coach is greatly increased by the seat for a long time. In the course of training in a subject-II field, a coach can pay attention to a special corner area and a downhill area in a shady and cool place or a monitoring room of a driving practice field, remote braking can be realized when danger is found, and the risk of misoperation of a student is reduced. Meanwhile, the conventional learner-driven vehicle is provided with an auxiliary brake system, needs mechanical parts, is assembled by punching, and has higher component cost than a remote control speed limiter. Therefore, the remote control speed limiter of the electric learner-driven vehicle can replace a secondary brake system of the learner-driven vehicle, remote control intervention is realized, improper operation of a student is realized, the high labor intensity of a trainer is greatly reduced, the working environment of heat solarization is improved, and the device is economical and convenient.

Chinese patent "remote control brake device for vehicle, remote control system for vehicle and remote control brake method for vehicle", publication No. CN105329234A, published japanese 2016.02.17 discloses a remote control brake device for vehicle, comprising: the automatic parking module is used for receiving a braking instruction sent by the remote control terminal, performing braking control on the vehicle according to the braking instruction and sending a braking failure signal when the braking control fails; a control module coupled to the auto park module, the control module controlling an engine of the vehicle to stall and a clutch of the vehicle to engage the engine to brake by drag reversal of the engine after receiving the brake failure signal when the vehicle is in a remote drive mode. The scheme is that the parking system is used for parking, and when the parking system fails, the engine is braked by combining with a clutch in a flameout mode.

Disclosure of Invention

Aiming at the problems in the prior art, the invention aims to provide an economical and convenient remote braking system for an electric instruction car, which can reduce the labor intensity of a coach.

In order to achieve the above object, the present invention provides a remote braking system for an electric learner-driven vehicle, comprising: the system comprises a wireless remote controller, a wireless receiving module, a vehicle control unit and a motor;

the wireless remote controller sends a braking execution instruction to the radio receiving module through radio waves;

when the radio receiving module receives a braking instruction, the radio receiving module automatically controls the relay on the radio receiving module to suck: when the relay is switched on, the voltage of 12V is output, and when the relay is switched off, the relay is switched off;

the vehicle control unit receives 12V voltage information output by the relay through the I/O port, and sends an instruction to the motor when detecting 12V voltage, and the vehicle braking is controlled through the motor braking force.

Preferably, the vehicle instrument is further included; when the vehicle is controlled to brake, the vehicle control unit simultaneously sends an external control information frame to the instrument, and the vehicle instrument warns students.

Preferably, the method for controlling the motor brake of the vehicle control unit comprises the following steps:

s1, whether a 12V voltage input signal is received or not, and the next step is yes; otherwise, quitting;

s2, whether the vehicle is Ready and whether the gear is D gear or R gear, yes, and the next step; otherwise, quitting;

s3, whether the absolute value of the vehicle speed is less than or equal to 1km/h,

the method comprises the following steps: the vehicle control unit sends a motor rotating speed control mode instruction to control the rotating speed target of the motor to be 0, and the next step is carried out;

otherwise: the vehicle control unit sends a torque control mode instruction of forced speed reduction, the motor executes the torque instruction of the vehicle control unit, and the next step is carried out;

s4, whether the 12V voltage input signal disappears, if yes, exiting; otherwise, S3 is repeated.

Further preferably, the torque is calculated by: when the vehicle speed is positive, the brake torque is maximally output from the minimum torque allowed by the battery system, the minimum torque allowed by the motor system and the minimum torque allowed by the temperature control system; when the vehicle speed is negative, the driving torque is output to the minimum of the maximum torque allowed by the battery system, the maximum torque allowed by the motor system and the maximum torque allowed by the temperature control system.

The invention has the beneficial effects that: the invention realizes the braking of the vehicle through remote control, and is particularly suitable for the automatic-gear electric learner-driven vehicle to be used in the field teaching of subject two.

The system realizes remote control intervention of the coach on improper operation of the student, greatly reduces the labor intensity of the coach, improves the working environment of sunstroke and solarization, and is economical and convenient.

Drawings

FIG. 1 is a block diagram of the architecture of the present invention

FIG. 2 is a flow chart of the vehicle control unit controlling the braking of the motor according to the present invention

Detailed Description

The technical solutions of the present invention (including the preferred ones) are further described in detail by way of fig. 1 to 2 and enumerating some alternative embodiments of the present invention. It is to be understood that the described embodiments are merely a few embodiments of the invention, and not all embodiments. All other embodiments, which can be derived by a person skilled in the art from the embodiments of the present invention without any inventive step, are within the scope of the present invention.

As shown in fig. 1 and 2, the remote braking system for an electric instructional car of the present invention comprises: the system comprises a wireless remote controller, a radio receiving module, a Vehicle Control Unit (VCU), a motor and a vehicle instrument;

the wireless remote controller sends a braking execution instruction to the radio receiving module through radio waves; the wireless remote controller is provided with a button, the button is pressed, namely the relay is sucked, and the button is released, namely the relay is disconnected;

when the radio receiving module receives a braking instruction, the radio receiving module automatically controls the relay on the radio receiving module to suck: when the relay is switched on, the voltage of 12V is output, and when the relay is switched off, the relay is switched off;

the vehicle control unit receives 12V voltage information output by the relay through the I/O port, and sends an instruction to the motor when detecting 12V voltage, and the vehicle braking is controlled through the motor braking force;

when the vehicle is controlled to brake, the vehicle control unit simultaneously sends an external control information frame to the instrument, and the vehicle instrument warns students. When the vehicle instrument receives an external control information frame sent by the VCU, the display of 'external control is in execution' is displayed to prompt a driver, and dripping warning sound is sent to remind a student.

The coach sends a switching signal through the handheld wireless remote controller, and the signal is transmitted through radio.

The radio receiving module needs a 12V low-voltage power supply to maintain power supply, when receiving the opening signal, the relay is switched on, the output pin of the relay can output 12V voltage, and otherwise, the radio receiving module keeps a disconnected state.

And the vehicle control unit receives a 12V voltage signal through the I/O port. If the voltage signal is received, the VCU enters an external control speed reduction state, and sends a torque or rotating speed control command to the motor to gradually reduce the vehicle speed to 0. If the voltage signal is deactivated, the system operates in a conventional mode. The specific control method is shown in fig. 2.

And judging whether 12V voltage input from the wireless receiving module is received or not, and if the 12V voltage input exists, immediately reporting external operation information to the planned instrument, wherein the vehicle is ready, and is in D gear or R gear. And subsequently, determining to enter a torque control mode or a rotating speed control mode according to the vehicle speed. And if the absolute value of the vehicle speed is less than or equal to 1Km/h, the VCU sends a command to a motor rotating speed control mode to control the motor rotating speed target to be 0. If the absolute value of the vehicle speed is greater than 1Km/h, a torque control mode is entered. The torque calculation method comprises the following steps: if the vehicle speed is positive, namely the vehicle needs to be decelerated through braking, the braking torque (defined as a negative value) takes the maximum output from the minimum torque allowed by the battery system, the minimum torque allowed by the motor system and the minimum torque allowed by the temperature control system; if the vehicle speed is negative, namely the vehicle needs to be driven to decelerate in the positive direction, the driving torque is output to the minimum from the maximum torque allowed by the battery system, the maximum torque allowed by the motor system and the maximum torque allowed by the temperature control system. When the 12V high-voltage signal disappears, the external control state is immediately exited.

The vehicle instrument is responsible for prompting the driver. When the vehicle instrument receives an external control information frame sent by the VCU, namely the relay is controlled by the radio receiving module to be switched on, and a 12V voltage signal is transmitted to the VCU, the 'external control execution in progress' is displayed to prompt a driver, and a dripping warning sound is sent to remind a student.

It will be understood by those skilled in the art that the foregoing is only a preferred embodiment of the present invention, and is not intended to limit the invention, and any modification, combination, replacement, or improvement made within the spirit and principle of the present invention is included in the scope of the present invention.