CN203344935U - Automotive active safety system - Google Patents

Abstract

The utility model discloses an automotive active safety system which comprises a power source module, a manual switch, an ultrasonic wave sensor, an analog/digital (A/D) converter, a single-chip control module, a digital/analog (D/A) converter, an amplifying circuit, a relay, an electromagnetic valve and an electromagnet. According to the automotive active safety system, the sensor is used to detect automotive speeds and distances among automobiles, detection results are processed by a single-chip to control power supply of an automobile and perform service braking on the automobile, so that problems of rear-end collision, furious driving and the like can be effectively prevented; the automotive active safety system is convenient, practical, and worth popularizing.

Description

A vehicle active safety system

technical field

The utility model relates to the application field of sensors, in particular to an active safety system for automobiles.

Background technique

Now, with the improvement of people's living standards, the number of cars is increasing, but there are also more and more traffic accidents, most of which are small accidents such as rear-end collisions. Faster brake measures are taken, and even a lot of people mistake the accelerator for brakes because they are too nervous. Therefore, a simple in structure, low in price, and easy to use automotive active safety system are needed to reduce the occurrence of rear-end collisions.

Utility model content

Aiming at the defects of the above-mentioned background technology, the utility model proposes an active safety system for automobiles, which uses sensors to detect vehicle speed and inter-vehicle distance. Effectively prevent the occurrence of problems such as rear-end collision and speeding, convenient and practical, and worthy of popularization.

In order to solve the above problems, the technical solution adopted by the utility model is:

An active safety system for automobiles, including a power module, a manual switch, an ultrasonic sensor, an A/D converter, a single-chip microcomputer control module, a D/A converter, an amplifying circuit, a relay, a solenoid valve and an electromagnet, wherein the power module is manually The switch is connected with the single-chip microcomputer control module, and the power supply module supplies power to the whole circuit through the single-chip microcomputer control module when the manual switch is closed. After A/D conversion, the detection data is sent to the single-chip microcomputer control module; the output terminal of the single-chip microcomputer control module is connected to the input terminal of the D/A converter, and the D/A converter, the amplifying circuit and the relay are connected in sequence, and the relays are respectively connected to the The solenoid valve and the electromagnet are connected, and the solenoid valve and the electromagnet are respectively connected with the oil pipe and the pedal brake.

As a further optimization solution of the present utility model, the A/D converter is also connected with a speed sensor, and the speed sensor is arranged on the front bumper of the automobile, and the detected speed data is sent to the A/D converter.

As a further optimization solution of the present utility model, the power supply module is a rechargeable lithium battery.

Compared with the prior art, the utility model has the following technical effects:

First, the sensor principle is used to monitor the speed and distance between vehicles in real time, which can prevent accidents at any time;

Second, the single-chip microcomputer circuit is used, and the program can be upgraded at any time, which is convenient for adding more functions;

Third, the idea is ingenious, the structure is simple, and it is suitable for promotion.

Description of drawings

Figure 1 is a block diagram of the system circuit.

Fig. 2 is a structural diagram of an electromagnet;

Note: 1. Electromagnet, 2. Connecting hook.

Figure 3 is a schematic diagram of the connection between the electromagnet and the brake pedal;

Note: 1. Electromagnet, 2. Connecting hook, 3. Brake pedal.

Detailed ways

Below in conjunction with accompanying drawing, the technical scheme of the utility model is described in further detail:

As shown in Figure 1, an automotive active safety system includes a power module, a manual switch, an ultrasonic sensor, an A/D converter, a single-chip microcomputer control module, a D/A converter, an amplifier circuit, a relay, a solenoid valve and an electromagnet, Among them, the power supply module is connected with the single-chip microcomputer control module through the manual switch, and the power supply module supplies power to the whole circuit through the single-chip microcomputer control module when the manual switch is closed. The ultrasonic sensor is set on the front bumper of the car and sends the detection data to the A/D converter. The A/D converter sends the detection data into the single-chip control module after performing A/D conversion; the output end of the single-chip control module is connected to the input end of the D/A converter, and the D/A converter, the amplifying circuit and the relay Connected in turn, the relay is connected with the solenoid valve and the electromagnet respectively, and the solenoid valve and the electromagnet are connected with the oil pipe and the pedal brake respectively. The A/D converter is also connected with a speed sensor, the speed sensor is arranged on the front bumper of the car, and the detected speed data is sent to the A/D converter, and the power module is a rechargeable lithium battery.

The solenoid valve is installed on the oil pipe, and it is normally open under normal circumstances to ensure the normal oil supply of the car engine.

As shown in Figure 2 and Figure 3, the electromagnet is connected to the brake pedal using the front connecting hook. After the electromagnet is energized, it will shrink. The movement will drive the brake pedal to move downward to play the role of car braking. Since the connecting hook has an opening, it will not affect the driver's normal depressing of the brake pedal.

The control winding of the relay is connected with the amplifying circuit, and the normally open contacts of the relay are respectively connected with the solenoid valve and the electromagnet.

The user presses the manual switch, the power supply module supplies power to the system, and the microcontroller is in a standby state after initialization.

The ultrasonic sensor is installed on the front bumper of the car, facing the front, and detects the distance from the vehicle in front. The ultrasonic sensor transmits the detection data to the single-chip control module through the A/D converter. The single-chip control module calculates the safe distance from the vehicle in front according to the speed of the vehicle, and compares it with the set value. If the distance from the vehicle in front is greater than the set value, It means that the distance between the vehicle and the vehicle in front is a safe distance, and the single-chip microcomputer control module will not act and continue to detect; compared with the set value, if the distance between the vehicle and the vehicle in front is less than the set value, it means that the distance between the vehicle and the vehicle in front is less than The safety distance, the single-chip microcomputer control module will issue a braking command, and the braking command issued by the single-chip microcomputer control module will convert the digital signal into an analog signal through the D/A converter. After the signal is amplified by the amplifier circuit, the control relay is connected. The open contacts pull together, the solenoid valve and the electromagnet are connected to the power supply at the same time. On the one hand, the solenoid valve closes the oil pipe after being energized, stops the oil supply to the engine, and reduces the power output. On the other hand, the electromagnet will shrink after being energized, and the electromagnet Finally, it will drive the connecting hook to move, because the connecting hook is hooked on the brake pedal, the movement of the connecting hook will drive the brake pedal to move downward, and play the role of automobile braking.

The speed sensor is set on the front bumper of the car to detect the speed of the car. The detected data is transmitted to the single-chip control module through the A/D converter. When the program in the single-chip control module judges that the speed exceeds the limit speed, it will follow the above method Apply braking to decelerate.

Claims (3)

1. A kind of automobile active safety system, it is characterized in that: comprise power supply module, manual switch, ultrasonic sensor, A/D converter, single-chip microcomputer control module, D/A converter, amplifying circuit, relay, electromagnetic valve and electromagnet, Among them, the power supply module is connected with the single-chip microcomputer control module through the manual switch, and the power supply module supplies power to the whole circuit through the single-chip microcomputer control module when the manual switch is closed. The ultrasonic sensor is set on the front bumper of the car and sends the detection data to the A/D converter. The A/D converter sends the detection data into the single-chip control module after performing A/D conversion; the output end of the single-chip control module is connected to the input end of the D/A converter, and the D/A converter, the amplifying circuit and the relay Connected in turn, the relay is connected with the solenoid valve and the electromagnet respectively, and the solenoid valve and the electromagnet are connected with the oil pipe and the pedal brake respectively. 2. A kind of automobile active safety system as claimed in claim 1, is characterized in that: described A/D converter is also connected with speed sensor, and described speed sensor is arranged on the front bumper of automobile, and the speed data of detection into the A/D converter. 3. An automobile active safety system according to claim 1, characterized in that: said power supply module is a rechargeable lithium battery.

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