CN205113049U - Electric automobile initiative collision avoidance system - Google Patents

Abstract

The utility model discloses an active anti-collision system for an electric vehicle, which solves the technical problem that the existing anti-collision system on the vehicle cannot provide anti-collision protection when the vehicle is reversing. The active anti-collision system for the electric vehicle of the utility model comprises: The front ultrasonic radar is set at the front of the car to detect obstacles in front of the car; the rear ultrasonic radar is set at the rear of the car to detect obstacles behind the car; the main control unit of the radar ECU is used to collect the front ultrasonic radar and The signal of the rear ultrasonic radar obtains the distance data between the car and the front or rear obstacles; the driving motor is connected to the power shaft of the car; the motor controller is connected to the main control unit of the radar ECU through the CAN bus to collect the distance between the car and the front or rear obstacles Distance data; the motor controller generates a control signal based on the collected distance data to control the drive motor to rotate in the opposite direction relative to the rotation direction of the power shaft of the vehicle to reduce the speed of the vehicle.

Description

Electric Vehicle Active Collision Avoidance System

technical field

The utility model relates to an active anti-collision system for an electric vehicle.

technical background

With the rapid development of society, the number of cars is also increasing year by year. Due to the unreasonable driving skills of drivers and the layout of roads and equipment, as well as the fact that novices are not familiar with driving skills, misuse and psychological fear, the incidence of traffic accidents is high. It remains high every year.

Anti-collision systems that can automatically brake have also appeared on existing cars to reduce or avoid traffic accidents, but these anti-collision systems can only perform anti-collision protection when the car is moving forward, and cannot perform anti-collision when the car is reversing Therefore, it cannot reduce or avoid the loss of a collision accident when the car is reversing.

Utility model content

The technical problem to be solved by the utility model is to provide an active anti-collision system for an electric vehicle, which solves the technical problem that the existing anti-collision system on the vehicle cannot perform anti-collision protection when the vehicle is reversing.

In order to solve the above technical problems, the utility model adopts the following technical solutions:

Electric vehicle active collision avoidance system, including:

Front ultrasonic radar, located at the front of the car, is used to detect obstacles in front of the car;

Rear ultrasonic radar, located at the rear end of the car, is used to detect obstacles behind the car;

The radar ECU main control unit is used to collect the signals of the front ultrasonic radar and the rear ultrasonic radar to obtain the distance data between the car and the front or rear obstacles;

The driving motor is connected to the power shaft of the vehicle;

The motor controller is connected to the main control unit of the radar ECU through the CAN bus to collect the distance data between the car and the front or rear obstacles;

The motor controller generates a control signal according to the collected distance data to control the driving motor to rotate in the opposite direction relative to the rotation direction of the vehicle power shaft, so as to reduce the speed of the vehicle.

Further, the main control unit of the radar ECU collects the signals of the front ultrasonic radar and the rear ultrasonic radar to calculate the relative speed between the car and the front or rear obstacles, and the motor controller collects the relative speed data to generate a safety distance value. When the distance data collected by the sensor is less than the safety distance value, the motor controller generates a control signal to control the driving motor to rotate in the opposite direction relative to the rotation direction of the power shaft of the vehicle.

Further, the active collision avoidance system also includes an acousto-optic alarm module located at the rear end of the car, the acousto-optic alarm module includes a warning light and a buzzer, and the motor controller controls the rotation of the driving motor while controlling the acousto-optic alarm The module is powered on.

Further, there are two front ultrasonic radars, and the two front ultrasonic radars are respectively arranged on both sides of the front end of the vehicle, and there is one rear ultrasonic radar.

The beneficial effects of the utility model are:

The radar ECU main control unit collects the signals of the front ultrasonic radar and the rear ultrasonic radar to obtain the distance between the car and the front or rear obstacles. The radar ECU main control unit sends the distance data to the motor controller through the CAN bus message, and the motor controller according to When the distance data is less than a certain value, the drive motor is controlled to rotate in the opposite direction relative to the rotation direction of the car's power shaft, so that when the car is moving forward and backward, the active anti-collision system can decelerate the car to reduce or avoid car collision accidents loss, taking into account the improvement of driving safety when the car is moving forward and back.

Description of drawings

Below in conjunction with accompanying drawing and specific embodiment, the utility model is further described:

Figure 1 is a schematic diagram of an active collision avoidance system for an electric vehicle.

detailed description

Below in conjunction with accompanying drawing, the specific embodiment of the present utility model is described in detail.

Referring to FIG. 1 , the active collision avoidance system of an electric vehicle includes a front ultrasonic radar 1 , a rear ultrasonic radar 2 , a radar ECU main control unit 3 , a driving motor 5 , a motor controller 6 and an audible and visual alarm module 7 .

The front ultrasonic radar 1 is located at the front end of the car and is used to detect obstacles in front of the car. Because the high-speed driving of the car is generally in the forward direction, it is necessary to improve the range of obstacles in the front of the detection car. Therefore, there are two front ultrasonic radars 1, The two front ultrasonic radars 1 are respectively arranged on both sides of the front end of the vehicle;

Rear ultrasonic radar 2 is located at the rear end of the car and is used to detect obstacles behind the car. Because the car is reversing, the general speed is reduced. In order to reduce costs, the rear ultrasonic radar 2 is one, and the rear ultrasonic radar 2 is located on the symmetrical plane of the car. The symmetrical plane of the car refers to the central plane that divides the car shell symmetrically into two parts in the longitudinal direction of the car. The rear ultrasonic radar 2 is located on the symmetrical plane, which is conducive to the balanced detection of obstacles behind the car;

The radar ECU main control unit 3 is used to collect the signals of the front ultrasonic radar 1 and the rear ultrasonic radar 2. The front ultrasonic radar 1 and the rear ultrasonic radar 2 are radar probes, which are connected to the radar ECU main control unit 3 through a data line. The control unit 3, the front ultrasonic radar 1, and the rear ultrasonic radar 2 adopt radar components with the functions of measuring distance and relative speed, and can calculate the distance and relative speed between the car and the front or rear obstacles;

The drive motor 5 is connected to the power shaft of the automobile;

The motor controller 6 is connected to the radar ECU main control unit 3 through the CAN bus, and the radar ECU main control unit sends the distance data to the motor controller through the CAN bus message, and the motor controller collects the distance sent by the radar ECU main control unit 3 in real time data and relative velocity data;

The electrode controller 6 adopts a single-chip microcomputer, and when the motor controller 6 reaches a certain value according to the collected distance data, it generates a control signal to control the drive motor 5 to rotate in the opposite direction relative to the rotation direction of the power shaft of the automobile, so as to reduce the speed of the vehicle. DC motor, the electrode controller 6 controls the current output to the drive motor 5, thereby controlling the rotation or stop of the drive motor 5, and the electrode controller 6 controls the forward and reverse rotation of the drive motor 5 by controlling the direction of the current, so as to reverse the rotation direction relative to the power shaft of the automobile. Rotate to realize the deceleration of electric vehicles, thereby reducing or avoiding the loss of collision accidents when the vehicle is moving forward or reversing, and improving driving safety.

The electrode controller 6 adopts a single-chip microcomputer, and the motor controller 6 controls the connection between the power supply and the drive motor 5 and the direction of the current flowing into the drive motor 5. When the distance value of the object reaches the safe distance between the automobile and the front or rear obstacles, the motor controller 6 controls the power supply to output the corresponding direction of electric current to the drive motor 5 to control the drive motor 5 to rotate in reverse with respect to the direction of rotation of the power shaft of the automobile, and the drive motor 5 Apply a reverse braking force to the power shaft of the car to reduce the speed of the car until the distance between obstacles in front of or behind the car is greater than the safe distance.

As we all know, the greater the relative speed between the car and the obstacle, the greater the safety distance required by the car. The radar ECU main control unit 3 collects the signals of the front ultrasonic radar 1 and the rear ultrasonic radar 2 to calculate the distance between the car and the front or rear obstacles. The relative speed of the object, the motor controller 6 collects the relative speed data of the main control unit 3 of the radar ECU to generate a safety distance value. In order to simplify the control process, the safety distance value and the relative speed adopt a proportional relationship, and the best The ratio of the safe distance value to the relative speed, the proportional algorithm is preset in the motor control 6 as an existing common single-chip control technology, when the distance data collected by the motor controller 6 is less than the safe distance value, the motor controller 6 generates a control The signal controls the driving motor 5 to rotate in the opposite direction relative to the rotation direction of the vehicle power shaft, so that the vehicle decelerates. The active anti-collision system dynamically adjusts the safety distance according to the relative speed, which is more scientific and effective, and further improves the driving safety of the vehicle.

The sound and light alarm module 7 includes a warning light and a buzzer, and the motor controller 6 controls the driving motor 5 to rotate and controls the sound and light warning module 7 to be powered on, and emits light and sounds through the sound and light warning light and the buzzer in the sound and light warning module 7. Make a sound to remind the surrounding vehicles, further improving driving safety.

The above has described the preferred embodiments of the utility model, but it should not be understood as a limitation on the claims. The utility model is not limited to the above embodiments, and its specific structure is allowed to change. Those skilled in the art can make various changes and deformations according to the utility model. As long as they do not depart from the spirit of the utility model, they all belong to the rights attached to the utility model. The scope defined by the requirement.

Claims (4)

1. The active collision avoidance system of an electric vehicle is characterized in that it includes: Front ultrasonic radar, located at the front of the car, is used to detect obstacles in front of the car; Rear ultrasonic radar, located at the rear end of the car, is used to detect obstacles behind the car; The radar ECU main control unit is used to collect the signals of the front ultrasonic radar and the rear ultrasonic radar to obtain the distance data between the car and the front or rear obstacles; The driving motor is connected to the power shaft of the vehicle; The motor controller is connected to the main control unit of the radar ECU through the CAN bus to collect the distance data between the car and the front or rear obstacles; The motor controller generates a control signal according to the collected distance data to control the driving motor to rotate in the opposite direction relative to the rotation direction of the vehicle power shaft, so as to reduce the speed of the vehicle. 2. The active collision avoidance system for electric vehicles according to claim 1, wherein the radar ECU main control unit collects the signals of the front ultrasonic radar and the rear ultrasonic radar to calculate the relative speed of the automobile and the front or rear obstacles, The motor controller collects relative speed data to generate a safety distance value. When the distance data collected by the motor controller is smaller than the safety distance value, the motor controller generates a control signal to control the driving motor to rotate in the opposite direction relative to the rotation direction of the vehicle power shaft. 3. The active collision avoidance system for an electric vehicle according to claim 1, wherein the active collision avoidance system also includes an audible and visual alarm module located at the rear end of the vehicle, and the audible and visual alarm module includes a warning light and a buzzer device, the motor controller controls the drive motor to rotate and at the same time controls the sound and light alarm module to be powered. 4. The active collision avoidance system for electric vehicles according to claim 1, wherein there are two front ultrasonic radars, the two front ultrasonic radars are respectively arranged on both sides of the front end of the vehicle, and the rear ultrasonic radar is one .