CN107128302A - A kind of gauge initiative alarming anticollision device, collision-prevention device of automobile five and method - Google Patents

Abstract

The invention discloses an automobile five-limit active alarm anti-collision device and method. The device includes a vehicle front collision recognition system, a vehicle rear collision recognition system and a five-limit judgment processing system; the vehicle front collision recognition system includes a vehicle front ultrasonic ranging module, the The vehicle speed measurement module and the vehicle front collision recognition module; the vehicle rear collision recognition system includes the vehicle rear ultrasonic ranging module, the vehicle speed measurement module and the vehicle rear collision recognition module; the five-limit judgment processing system includes the control unit, the voice alarm module, the automatic Braking module and electromagnetic anti-collision module; the present invention adopts the division of the front three boundaries of the car and the two rear boundaries of the car and the total five boundaries of the car, which can provide good warning and anti-collision measures for the driver; when there is a collision possibility, the collision possibility Minimize; in the event of a collision, minimize the degree of collision damage.

Description

A five-limit active alarm and anti-collision device and method for automobiles

technical field

The invention belongs to the technical field of automobile safety, and in particular relates to an automobile active alarm and anti-collision device.

Background technique

With the continuous popularization of family cars, people's requirements for car driving safety continue to increase, which enables the continuous development and improvement of car safety technology, and continues to develop in the direction of intelligence and digitalization. Traditional car safety design mainly considers passive safety technology, such as setting seat belts, airbags, bumpers and so on. Now car designers are more concerned with active safety technology, enabling cars to take proactive measures to avoid accidents or reduce the hazards of accidents.

However, the existing active safety technology for automobiles cannot completely avoid traffic accidents, especially when the friction coefficient of the ground is reduced in rainy days, the car is overspeeding, and the brakes of the car are out of order. Therefore, how to better, safer, and more perfect to actively avoid the occurrence of automobile traffic accidents and reduce the harmfulness of traffic accidents has become a difficult problem to be solved urgently.

Contents of the invention

The purpose of the present invention is to provide a five-limit active alarm and anti-collision device for automobiles to improve the driving safety of motor vehicles, reduce the probability of traffic accidents, and remind the driver through the voice alarm module when there is a possibility of collision, and start The automatic braking module reduces the possibility of collision; when the collision is unavoidable, the electromagnetic anti-collision device is activated to minimize the damage rate of the accident.

In order to achieve the above object, the present invention adopts the following technical solutions:

An automobile five-limit active alarm anti-collision device, including a front collision recognition system, a rear collision recognition system and a five-limit judgment processing system;

The front collision recognition system includes the front ultrasonic ranging module, the vehicle speed measurement module and the front collision recognition module;

The rear collision recognition system includes the rear ultrasonic ranging module, the vehicle speed measurement module and the rear collision recognition module;

The five-limit judgment processing system includes a control unit, a voice alarm module, an automatic braking module and an electromagnetic anti-collision module;

The output ends of the ultrasonic ranging module in front of the vehicle and the vehicle speed measurement module are connected to the input terminal of the front collision identification module; the output terminals of the rear ultrasonic ranging module and the vehicle speed measurement module are connected to the rear collision identification module The input terminal is connected; the input terminal of the control unit is respectively connected with the output terminals of the vehicle front collision recognition module and the vehicle rear collision recognition module, and the output terminal of the control unit is respectively connected with the input terminals of the voice alarm module, the automatic braking module and the electromagnetic anti-collision module .

Further, the ultrasonic ranging module in front of the vehicle is used to detect the distance between the vehicle and the vehicle in front; the ultrasonic ranging module behind the vehicle is used to detect the distance between the vehicle and the vehicle behind; the vehicle speed measurement module is used to collect the speed information of the vehicle; The front collision identification module is used to calculate the minimum safe distance D _r1 between the vehicle in front and the vehicle according to the output information of the front ultrasonic ranging module and the vehicle speed measurement module; Calculate the minimum safe distance D _r2 between the rear vehicle and the vehicle based on the output information of the distance module and the vehicle speed measurement module; the control unit is used to control the corresponding voice alarm module according to the output information of the front collision recognition module and the rear collision recognition module One or more of the automatic braking module and the electromagnetic anti-collision module work.

Further, the minimum safety distance D _r1 is calculated through the following steps:

(1) The ultrasonic ranging module in front of the vehicle continuously detects the echo reflected by the vehicle in front after the ultrasonic emission, so as to measure the time difference ΔT between transmitting the ultrasonic wave and receiving the echo; the ultrasonic module in front of the vehicle is based on the current air thermometer measured by the temperature sensor Calculate the corresponding sound velocity value C, and calculate the distance S between the current vehicle and the vehicle in front according to the formula S=C×ΔT/2;

(2) The vehicle speed measurement module directly collects the vehicle speed value in the vehicle speedometer;

(3) The vehicle front collision recognition module collects the distance value S between the vehicle and the vehicle in front which is input and converted by the ultrasonic sensor in front of the vehicle, and collects the vehicle speed value V _of the vehicle input by the vehicle speed measurement module; according to the formula Calculate the front vehicle speed value V ₂ ; according to the formula with Calculate the acceleration value a ₁ of the own vehicle and the acceleration value a ₂ of the front vehicle; finally according to the formula, The minimum safe vehicle distance D _r1 between the vehicle in front and the vehicle in front is obtained, where: T _f1 is the critical time for the driver of the vehicle to react to the vehicle in front, T _d1 is the braking coordination time of the vehicle, and T _z1 is the deceleration growth of the vehicle Time, φ ₁ is the braking distance correction coefficient; for cement road, φ ₁ =0.06; for asphalt road, φ ₁ =0.12.

Further, when the value range of the distance D ₁ between the vehicle in front and the vehicle is 2D _r1 < D ₁ ≤ 3D _r1 , the output terminal of the control unit sends a signal to the voice alarm module, and the voice alarm module reminds the driver that "the distance between the vehicle in front and the vehicle is Too close, please keep a safe distance between vehicles"; when the distance D ₁ between the current vehicle and the vehicle is in the range of D _r1 < D ₁ ≤ 2D _r1 , the output terminal of the control unit sends signals to both the voice alarm module and the automatic braking module , the voice alarm module reminds the driver that "the distance between the vehicle in front and the vehicle is too close, start the automatic brake", and the automatic brake module automatically brakes the vehicle; the value range of the distance D ₁ between the current vehicle and the vehicle is 0<D ₁ ≤ When D _r1 , the output terminal of the control unit sends signals to the voice alarm module, the automatic braking module and the electromagnetic anti-collision module at the same time, and the voice alarm module reminds the driver "the distance between the vehicle in front and the vehicle is too close, start the electromagnetic anti-collision", The automatic braking module automatically brakes the vehicle, and at the same time starts the electromagnetic anti-collision module of the vehicle and notifies the vehicle in front to start the electromagnetic anti-collision module. The electromagnetic anti-collision module of the vehicle and the electromagnetic anti-collision module of the vehicle in front generate electromagnetic fields with the same polarity, so Electromagnetic repulsion is generated between the vehicle and the vehicle in front to avoid collisions or reduce the damage of collisions.

Further, the minimum safety distance D _r2 is calculated through the following steps:

(1) The ultrasonic ranging module behind the car continuously detects the echo reflected by the rear car after the ultrasonic emission, so as to measure the time difference ΔT between the ultrasonic emission and the received echo; the ultrasonic module calculates the corresponding air temperature based on the current air temperature measured by the temperature sensor. The sound velocity value C, and according to the formula S=C×ΔT/2, calculate the distance S between the current vehicle and the rear vehicle;

(2) The vehicle speed measurement module directly collects the vehicle speed value in the vehicle speedometer;

(3) The vehicle rear collision recognition module collects the distance value S between the vehicle and the rear vehicle which is input and converted by the ultrasonic sensor behind the vehicle, and collects the vehicle speed value V _of the vehicle input by the vehicle speed measurement module; according to the formula Calculate the vehicle speed value V ₃ of the rear vehicle; according to the formula with Calculate the acceleration value a ₁ of the vehicle and the acceleration value a ₃ of the rear vehicle; finally according to the formula, The minimum safe vehicle distance D _r2 between the own vehicle and the rear vehicle is obtained, where T _f3 is the critical time for the rear driver to react to the own vehicle, T _d3 is the braking coordination time of the rear vehicle, and T _z3 is the deceleration growth of the rear vehicle Time, φ ₁ is the braking distance correction coefficient; for cement road, φ ₁ =0.06; for asphalt road, φ ₁ =0.12.

Further, when the range of the distance D ₂ between the vehicle behind and the vehicle is D _r2 < D ₂ ≤ 3D _r2 , the output terminal of the control unit sends a signal to the voice alarm module, and the voice alarm module reminds the driver that "the vehicle behind and the vehicle If the distance is too short, please keep a safe distance between vehicles”; when the value range of the distance D ₂ between the following vehicle and the vehicle is 0<D ₂ ≤ D _r2 , the output terminal of the control unit will send signals to both the voice alarm module and the electromagnetic anti-collision module at the same time. Send a signal, the voice alarm module reminds the driver "the distance between the rear car and the car is too close, start the electromagnetic anti-collision", and start the electromagnetic anti-collision module of the car at the same time and notify the car behind to start the electromagnetic anti-collision module, the electromagnetic anti-collision module of the car and The electromagnetic anti-collision module of the rear vehicle generates an electromagnetic field with the same polarity, so that electromagnetic repulsion is generated between the own vehicle and the rear vehicle, so as to avoid collision or reduce the damage degree of collision.

Further, the electromagnetic anti-collision module includes a car battery, an inverter, a booster, a large current generator, a rectifier and a superconducting device connected in sequence; the direct current generated in the car battery passes through the inverter, the booster, the high current The generator and rectifier generate a DC current greater than 1 kiloampere and send it into the superconducting device to generate a strong magnetic field.

Further, the front collision recognition system and the rear collision recognition system share a vehicle speed measurement module.

A five-limit active alarm and anti-collision method for automobiles, based on a five-limit active alarm and anti-collision device for automobiles. The five-limit active alarm and anti-collision device for automobiles includes a front collision recognition system, a rear collision recognition system and five Limit judgment processing system;

The front collision recognition system includes the front ultrasonic ranging module, the vehicle speed measurement module and the front collision recognition module;

The rear collision recognition system includes the rear ultrasonic ranging module, the vehicle speed measurement module and the rear collision recognition module;

The five-limit judgment processing system includes a control unit, a voice alarm module, an automatic braking module and an electromagnetic anti-collision module;

The output ends of the ultrasonic ranging module in front of the vehicle and the vehicle speed measurement module are connected to the input terminal of the front collision identification module; the output terminals of the rear ultrasonic ranging module and the vehicle speed measurement module are connected to the rear collision identification module The input terminal is connected; the input terminal of the control unit is respectively connected with the output terminals of the vehicle front collision recognition module and the vehicle rear collision recognition module, and the output terminal of the control unit is respectively connected with the input terminals of the voice alarm module, the automatic braking module and the electromagnetic anti-collision module ;

The ultrasonic ranging module in front of the vehicle is used to detect the distance between the vehicle and the vehicle in front; the ultrasonic ranging module behind the vehicle is used to detect the distance between the vehicle and the vehicle behind; the vehicle speed measurement module is used to collect the speed information of the vehicle; the front collision The identification module is used to calculate the minimum safety distance D _r1 between the vehicle in front and the vehicle according to the output information of the ultrasonic distance measurement module in front of the vehicle and the vehicle speed measurement module; The output information of the vehicle speed measurement module calculates the minimum safe distance D _r2 between the vehicle behind and the vehicle; the control unit is used to control the corresponding voice alarm module and automatic brake according to the output information of the front collision recognition module and the rear collision recognition module One or more of the module and the electromagnetic anti-collision module work;

Described a kind of automobile five limits active warning anti-collision method, comprises the following steps:

1) The front collision recognition system and the rear collision recognition system monitor the distance between the vehicle in front and the rear vehicle in real time, and calculate the minimum safe distance D _r1 between the vehicle and the front vehicle and the minimum safe distance D between the vehicle and the rear vehicle _r2 ;

2) The control unit performs the anti-collision judgment between the vehicle in front and the vehicle in front and the anti-collision judgment between the vehicle in front and the vehicle behind according to the real-time monitoring data in step 1, wherein:

The anti-collision judgment between the vehicle in front and the vehicle in front includes: when the distance D ₁ between the vehicle in front and the vehicle in the range of 2D _r1 < D ₁ ≤ 3D _r1 , the output terminal of the control unit sends a signal to the voice alarm module, and the voice alarm module reminds the driver or "The distance between the vehicle in front and the vehicle in front is too close, please keep a safe distance between vehicles"; when the distance D ₁ between the vehicle in front and the vehicle is in the range of D _r1 < D ₁ ≤ 2D _r1 , the output terminal of the control unit sends to the voice alarm module and The two automatic braking modules send out signals at the same time, and the voice alarm module reminds the driver that "the distance between the vehicle in front and this vehicle is too close, start automatic braking", and the automatic braking module automatically brakes the vehicle; the value of the distance D1 between the current vehicle and this vehicle When the range is 0<D ₁ ≤D _r1 , the output terminal of the control unit sends signals to the voice alarm module, the automatic braking module and the electromagnetic anti-collision module at the same time, and the voice alarm module reminds the driver that the distance between the vehicle in front and this vehicle is too close. , Start electromagnetic anti-collision", the automatic brake module automatically brakes the vehicle, and at the same time starts the electromagnetic anti-collision module of the vehicle and notifies the vehicle in front to start the electromagnetic anti-collision module, the electromagnetic anti-collision module of the vehicle and the electromagnetic anti-collision module of the vehicle in front generate Electromagnetic fields with the same polarity generate electromagnetic repulsion between the vehicle and the vehicle in front, avoiding collisions or reducing the damage of collisions;

The anti-collision judgment between the vehicle and the vehicle behind includes: when the distance D ₂ between the vehicle behind and the vehicle is in the range of D _r2 < D ₂ ≤ 3D _r2 , the output terminal of the control unit sends a signal to the voice alarm module, and the voice alarm module reminds The driver "the distance between the vehicle behind and the vehicle is too close, please keep a safe distance between vehicles"; when the distance D ₂ between the vehicle behind and the vehicle is in the range of 0<D ₂ ≤ D _r2 , the output terminal of the control unit sends a voice alarm module Both the electromagnetic anti-collision module and the electromagnetic anti-collision module send out signals at the same time, and the voice alarm module reminds the driver that "the distance between the vehicle behind and the vehicle is too close, start the electromagnetic anti-collision", and at the same time activate the electromagnetic anti-collision module of the vehicle and notify the vehicle behind to activate the electromagnetic anti-collision module The electromagnetic anti-collision module of the vehicle and the electromagnetic anti-collision module of the rear vehicle generate electromagnetic fields with the same polarity, so that electromagnetic repulsion is generated between the vehicle and the rear vehicle, so as to avoid collisions or reduce the damage of collisions.

Further, the minimum safety distance D _r1 is calculated through the following steps:

(1.1) The ultrasonic ranging module in front of the vehicle continuously detects the echo reflected by the vehicle in front after the ultrasonic emission, so as to measure the time difference ΔT between transmitting the ultrasonic wave and receiving the echo; the ultrasonic module in front of the vehicle is based on the current air thermometer measured by the temperature sensor Calculate the corresponding sound velocity value C, and calculate the distance S between the current vehicle and the vehicle in front according to the formula S=C×ΔT/2;

(1.2) The vehicle speed measurement module directly collects the vehicle speed value in the vehicle speedometer;

(1.3) The vehicle front collision recognition module collects the distance value S between the vehicle and the vehicle in front that is input and converted by the ultrasonic sensor in front of the vehicle, and collects the vehicle speed value V _of the vehicle input by the vehicle speed measurement module; according to the formula Calculate the front vehicle speed value V ₂ ; according to the formula with Calculate the acceleration value a ₁ of the own vehicle and the acceleration value a ₂ of the front vehicle; finally according to the formula, The minimum safe vehicle distance D _r1 between the vehicle in front and the vehicle in front is obtained, where: T _f1 is the critical time for the driver of the vehicle to react to the vehicle in front, T _d1 is the braking coordination time of the vehicle, and T _z1 is the deceleration growth of the vehicle Time, φ ₁ is the braking distance correction coefficient; for cement road, φ ₁ =0.06; for asphalt road, φ ₁ =0.12.

The minimum safety distance D _r2 is calculated by the following steps:

(2.1) The ultrasonic distance measuring module behind the car continuously detects the echo reflected by the rear car after the ultrasonic emission, so as to measure the time difference ΔT between the ultrasonic emission and the received echo; the ultrasonic module calculates the corresponding air temperature based on the current air temperature measured by the temperature sensor. The sound velocity value C, and according to the formula S=C×ΔT/2, calculate the distance S between the current vehicle and the rear vehicle;

(2.2) The vehicle speed measurement module directly collects the vehicle speed value in the vehicle speedometer;

(2.3) The vehicle rear collision recognition module collects the distance value S between the vehicle and the rear vehicle which is input and converted by the ultrasonic sensor behind the vehicle, and collects the vehicle speed value V _of the vehicle speed measurement module input; according to the formula Calculate the vehicle speed value V ₃ of the rear vehicle; according to the formula with Calculate the acceleration value a ₁ of the vehicle and the acceleration value a ₃ of the rear vehicle; finally according to the formula, The minimum safe vehicle distance D _r2 between the own vehicle and the rear vehicle is obtained, where T _f3 is the critical time for the rear driver to react to the own vehicle, T _d3 is the braking coordination time of the rear vehicle, and T _z3 is the deceleration growth of the rear vehicle Time, φ ₁ is the braking distance correction coefficient; for cement road, φ ₁ =0.06; for asphalt road, φ ₁ =0.12.

The beneficial effects of the present invention are as follows:

1. Effectively avoid a collision with the vehicle in front or reduce the damage caused by the collision. The single-chip microcomputer control system is used to continuously detect relevant data and calculate the safe distance D _r1 between the vehicle and the vehicle in front. When the value range of the distance D ₁ between the vehicle in front and the vehicle is 2D _r1 < D ₁ ≤ 3D _r1 , the output terminal of the control unit sends a signal to the voice alarm module, and the voice alarm module reminds the driver "the distance between the vehicle in front and the vehicle is too close, Please keep a safe distance between vehicles"; when the distance D ₁ between the current vehicle and the vehicle is in the range of D _r1 < D ₁ ≤ 2D _r1 , the output terminal of the control unit sends signals to both the voice alarm module and the automatic braking module, and the voice alarm The module reminds the driver that "the distance between the vehicle in front and the vehicle is too close, start the automatic brake", and the automatic brake module automatically brakes the vehicle to avoid further reduction of the distance between the vehicle in front and the vehicle; the distance between the current vehicle and the vehicle is D ₁ When the value range is 0<D ₁ ≤D _r1 , the output terminal of the control unit sends signals to the voice alarm module, the automatic braking module and the electromagnetic anti-collision module at the same time, and the voice alarm module reminds the driver that "the distance between the vehicle in front and the vehicle is If you are too close, activate the electromagnetic anti-collision", the automatic braking module will automatically brake the vehicle to prevent the distance between the vehicle in front and the vehicle from further reducing, and at the same time activate the electromagnetic anti-collision module to avoid collisions or reduce the damage of collisions.

2. Effectively avoid collision with the rear vehicle or reduce the degree of damage caused by the collision. The single-chip microcomputer control system is used to continuously detect relevant data and calculate the safe distance D _r2 between the vehicle and the vehicle behind. When the value range of the distance D ₂ between the vehicle behind and the vehicle is D _r2 < D ₂ ≤ 3D _r2 , the output terminal of the control unit sends a signal to the voice alarm module, and the voice alarm module reminds the driver that the distance between the vehicle behind and the vehicle is too close , please keep a safe distance between vehicles”; when the value range of the distance D ₂ between the vehicle behind and the vehicle is 0<D ₂ ≤ D _r2 , the output terminal of the control unit sends signals to both the voice alarm module and the electromagnetic anti-collision module, The voice alarm module reminds the driver that "the distance between the rear car and this car is too close, start the electromagnetic anti-collision", and start the electromagnetic anti-collision module at the same time to avoid the collision or reduce the damage of the collision.

3. The division of the three boundaries in front of the vehicle and the two boundaries in the rear and the five boundaries in total can provide drivers with good warning and anti-collision measures. When there is a possibility of collision, minimize the possibility of collision; when a collision occurs, minimize the degree of collision damage.

Description of drawings

Fig. 1 is the structure schematic diagram of automobile alarm anti-collision device;

Fig. 2 is a schematic diagram of five limits for car alarm and anti-collision;

Fig. 3 is the flow chart of the operation of the three-limit warning and anti-collision system in front of the vehicle;

Fig. 4 is the flow chart of the operation of the two-limit alarm and anti-collision system at the rear of the vehicle.

detailed description

The device is described in further detail below in conjunction with the accompanying drawings and specific embodiments:

Please refer to Fig. 1 to Fig. 4, an automobile five-limit active alarm anti-collision device of the present invention is composed of a front collision recognition system I, a rear collision recognition system II, and a five-limit judging and processing system III. Among them, the front collision recognition system I is composed of the front ultrasonic ranging module, the vehicle speed measurement module and the front collision recognition module; the rear collision recognition system II is composed of the rear ultrasonic ranging module, the vehicle speed measurement module and the rear The collision identification module is composed; the five-limit judgment processing system III is composed of a control unit, a voice alarm module, an automatic braking module and an electromagnetic anti-collision module. In the present invention, a set of electromagnetic anti-collision modules can be respectively arranged at the front and rear of the vehicle in a vehicle, and the polarity of the magnetic field produced by the electromagnetic anti-collision modules is fixed.

As shown in Figure 1, the output terminals of the ultrasonic ranging module in front of the vehicle and the vehicle speed measuring module are connected to the input terminal of the front collision recognition module; the output terminals of the ultrasonic ranging module behind the vehicle and the vehicle speed measuring module are connected The input end of the vehicle rear collision identification module is connected; the input end of the control unit is respectively connected with the output end of the vehicle front collision identification module and the vehicle rear collision identification module, and the output end of the control unit is respectively connected with the voice alarm module, the automatic braking module and the electromagnetic anti-corrosion module. Connect to the input terminal of the bump module.

The automatic braking module automatically intervenes when the driver still fails to take effective braking measures to prevent the distance between the vehicle and the vehicle in front from decreasing after the voice alarm module prompts. The automatic braking module sends a braking signal to the brake booster pump. The booster pump utilizes the vacuum generated on one side of the booster pump when the engine is inhaled to work, so that a huge pressure difference is generated on both sides of the booster pump diaphragm, thereby applying brake fluid to the brake master cylinder. Pressure, the fluid transmits the pressure through the pipeline to the piston of each wheel brake caliper, and the piston drives the brake caliper to clamp the brake disc to generate huge friction to slow the vehicle.

The working principle of the electromagnetic anti-collision module is that when the collision recognition module detects that the distance between the vehicle and the vehicle in front is too close, it will start the electromagnetic anti-collision module of the vehicle, and send a signal to notify the vehicle in front to activate the electromagnetic anti-collision module. Both vehicles generate direct current from their respective car batteries, and pass through inverters, boosters, high current generators and rectifiers to generate thousands of amperes of direct current. A high current of thousands of amperes is sent into the superconducting device through the cable to generate a strong magnetic field. The polarities of the electromagnetic fields of the front and rear vehicles are the same, and a huge repulsive force is generated in a short distance, so as to achieve the purpose of avoiding collision or reducing the damage of collision.

The present invention provides an active warning and anti-collision method for automobiles with five limits, comprising:

1. The working process of the front three boundaries:

According to Figure 1, Figure 2 and Figure 3, the relative distance between the vehicle and the vehicle in front and the vehicle speed signal measured by the ultrasonic distance measuring module in front of the vehicle and the vehicle speed measurement module are passed through the ultrasonic distance measurement module in front of the vehicle and the vehicle speed signal respectively. The output end of the vehicle speed measurement module is transmitted to the input end of the vehicle front collision identification module.

The front collision recognition module calculates the speed of the front vehicle, the distance between the front vehicle and the vehicle through differential calculation based on the two input values of the relative distance between the vehicle in front and the vehicle speed of the vehicle, and according to the change of the relative distance with time and the change of vehicle speed with time. Acceleration of the two vehicles, and finally calculate the minimum safe distance D _r1 between the vehicle in front and the vehicle. details as follows:

(1) The ultrasonic ranging module in front of the vehicle continuously detects the echo reflected by the vehicle in front after the ultrasonic emission, so as to measure the time difference ΔT between the ultrasonic emission and the echo reception. The ultrasonic module calculates the corresponding sound velocity value C according to the current air temperature measured by the temperature sensor, and the internal processor of the module can calculate the current distance S between the vehicle and the vehicle in front according to the formula S=C×ΔT/2.

(2) In order to save costs, the vehicle speed signal directly collects the vehicle speed value in the vehicle speedometer.

(3) The vehicle front collision recognition module collects the distance value S between the vehicle and the vehicle in front which is input and converted by the ultrasonic sensor in front of the vehicle, and collects the vehicle speed value V _of the vehicle input by the vehicle speed measurement module; according to the formula Calculate the front vehicle speed value V ₂ ; according to the formula with Calculate the acceleration value a ₁ of the own vehicle and the acceleration value a ₂ of the front vehicle; finally according to the formula, Get the minimum safe distance D _r1 between the vehicle in front and the vehicle in front, where: D _r1 is the minimum safe distance between the vehicle in front and the vehicle in front, V ₁ is the speed of the vehicle in front, V ₂ is the speed of the vehicle in front, and T _f1 is the driving speed of the vehicle in front. T _d1 is the braking coordination time of the vehicle, T _z1 is the deceleration growth time of the vehicle, φ ₁ is the correction coefficient of the braking distance; a ₁ is the acceleration of the vehicle, and a ₂ is the vehicle in front Acceleration; for cement road, φ ₁ =0.06; for asphalt road, φ ₁ =0.12.

As shown in Figure 2, the five boundaries for car alarm and anti-collision are divided into three boundaries in front of the vehicle and two boundaries in the rear of the vehicle. The front three boundaries of the car are Front1, Front2 and Front3 respectively. Front1 means that the range of D ₁ between the vehicle in front and the vehicle is 2D _r1 < D ₁ ≤ 3D _r1 ; Front2 indicates that the distance D ₁ between the vehicle in front and the vehicle is in the range D _r1 < D ₁ ≤ 2D _r1 ; Front3 indicates that The value range of the distance D ₁ between the preceding vehicle and the own vehicle is 0<D ₁ ≤D _r1 . The two boundaries behind the car are Back1 and Back2 respectively. Back1 indicates that the range of D ₂ between the following vehicle and the vehicle is D _r2 < D ₂ ≤ 3D _r2 ; Back2 indicates that the range of D ₂ between the vehicle behind and the vehicle is 0 < D ₂ ≤ D _r2 . D _r1 is the minimum safe distance between the vehicle and the front vehicle, and D _r2 is the minimum safe distance between the vehicle and the rear vehicle.

When the value range of the distance D ₁ between the vehicle in front and the vehicle is 2D _r1 < D ₁ ≤ 3D _r1 , the output terminal of the control unit sends a signal to the voice alarm module, and the voice alarm module reminds the driver "the distance between the vehicle in front and the vehicle is too close, Please keep a safe distance between vehicles"; when the distance D ₁ between the current vehicle and the vehicle is in the range of D _r1 < D ₁ ≤ 2D _r1 , the output terminal of the control unit sends signals to both the voice alarm module and the automatic braking module, and the voice alarm The module reminds the driver that "the distance between the vehicle in front and the vehicle is too close, start the automatic brake", and the automatic brake module automatically brakes the vehicle to avoid further reduction of the distance between the vehicle in front and the vehicle; the distance between the current vehicle and the vehicle is D ₁ When the value range is 0<D ₁ ≤D _r1 , the output terminal of the control unit sends signals to the voice alarm module, the automatic braking module and the electromagnetic anti-collision module at the same time, and the voice alarm module reminds the driver that "the distance between the vehicle in front and the vehicle is If you are too close, activate the electromagnetic anti-collision", the automatic braking module will automatically brake the vehicle to prevent the distance between the vehicle in front and the vehicle from further reducing, and at the same time activate the electromagnetic anti-collision module to avoid collisions or reduce the damage of collisions.

2. The working process of the second limit behind the car:

According to Figure 1, Figure 2 and Figure 4, the relative distance between the vehicle and the vehicle behind and the vehicle speed signal measured by the ultrasonic distance measuring module behind the vehicle and the vehicle speed measurement module are passed through the ultrasonic distance measuring module behind the vehicle and the vehicle speed signal respectively. The output end of the vehicle speed measurement module is transmitted to the input end of the vehicle rear collision identification module.

The vehicle rear collision recognition module calculates the speed of the rear vehicle and the distance between the vehicle and the rear vehicle through differential calculation according to the two input values of the relative distance between the vehicle and the vehicle behind and the vehicle speed Acceleration of the two vehicles, and finally calculate the minimum safe distance D _r2 between the rear vehicle and the own vehicle. details as follows:

(1) The ultrasonic ranging module behind the car continuously detects the echo reflected by the rear car after the ultrasonic emission, so as to measure the time difference ΔT between the ultrasonic emission and the echo reception. The ultrasonic module calculates the corresponding sound velocity value C according to the current air temperature measured by the temperature sensor, and the internal processor of the module can calculate the current distance S between the vehicle and the rear vehicle according to the formula S=C×ΔT/2.

(2) In order to save costs, the vehicle speed signal directly collects the vehicle speed value in the vehicle speedometer.

(3) The vehicle rear collision recognition module collects the distance value S between the vehicle and the rear vehicle which is input and converted by the ultrasonic sensor behind the vehicle, and collects the vehicle speed value V _of the vehicle input by the vehicle speed measurement module; according to the formula Calculate the vehicle speed value V ₃ of the rear vehicle; according to the formula with Calculate the acceleration value a ₁ of the vehicle and the acceleration value a ₃ of the rear vehicle; finally according to the formula, The minimum safe distance D _r2 between the self-vehicle and the rear vehicle is obtained, where: D _r2 is the minimum safe distance between the self-vehicle and the rear vehicle, V ₁ is the speed of the self-vehicle, V ₃ is the speed of the rear vehicle, and T _f3 is the driving speed of the rear vehicle T _d3 is the braking coordination time of the rear vehicle, T _z3 is the deceleration growth time of the rear vehicle, φ ₁ is the correction coefficient of the braking distance; a ₁ is the acceleration of the own vehicle, and a ₃ is the acceleration of the rear vehicle Acceleration; for cement road, φ ₁ =0.06; for asphalt road, φ ₁ =0.12.

As shown in Figure 2, the five boundaries for car alarm and anti-collision are divided into three boundaries in front of the vehicle and two boundaries in the rear of the vehicle. The front three boundaries of the car are Front1, Front2 and Front3 respectively. Front1 means that the range of D ₁ between the vehicle in front and the vehicle is 2D _r1 < D ₁ ≤ 3D _r1 ; Front2 indicates that the distance D ₁ between the vehicle in front and the vehicle is in the range D _r1 < D ₁ ≤ 2D _r1 ; Front3 indicates that The value range of the distance D ₁ between the preceding vehicle and the own vehicle is 0<D ₁ ≤D _r1 . The two boundaries behind the car are Back1 and Back2 respectively. Back1 indicates that the range of D ₂ between the following vehicle and the vehicle is D _r2 < D ₂ ≤ 3D _r2 ; Back2 indicates that the range of D ₂ between the vehicle behind and the vehicle is 0 < D ₂ ≤ D _r2 . D _r1 is the minimum safe distance between the vehicle and the front vehicle, and D _r2 is the minimum safe distance between the vehicle and the rear vehicle.

When the value range of the distance D ₂ between the vehicle behind and the vehicle is D _r2 < D ₂ ≤ 3D _r2 , the output terminal of the control unit sends a signal to the voice alarm module, and the voice alarm module reminds the driver that the distance between the vehicle behind and the vehicle is too close , please keep a safe distance between vehicles”; when the value range of the distance D ₂ between the vehicle behind and the vehicle is 0<D ₂ ≤ D _r2 , the output terminal of the control unit sends signals to both the voice alarm module and the electromagnetic anti-collision module, The voice alarm module reminds the driver that "the distance between the rear car and this car is too close, start the electromagnetic anti-collision", and start the electromagnetic anti-collision module at the same time to avoid the collision or reduce the damage of the collision.

After the car is installed with this set of five-limit active alarm and anti-collision device, it can remind and assist the driver to reduce the possibility of collision before the collision occurs; and the automatic braking module and superconducting electromagnetic anti-collision module can avoid or reduce the collision. The degree of damage caused by the collision of two vehicles.

Below in conjunction with concrete example illustrate a kind of automobile five limits active warning anti-collision method of the present invention:

1. The working process of the front three boundaries:

According to Figure 1, Figure 2 and Figure 3, the relative distance between the vehicle and the vehicle in front and the vehicle speed signal measured by the ultrasonic distance measuring module in front of the vehicle and the vehicle speed measurement module are passed through the ultrasonic distance measurement module in front of the vehicle and the vehicle speed signal respectively. The output end of the vehicle speed measurement module is transmitted to the input end of the vehicle front collision identification module.

The front collision recognition module calculates the speed of the vehicle in front and the distance between the vehicle in front and the vehicle in front through differential calculation according to the relative distance between the vehicle in front and the vehicle speed of the vehicle, and according to the change of the relative distance with time and the change of vehicle speed with time. Acceleration of the two vehicles, and finally calculate the minimum safe distance D _r1 between the vehicle in front and the vehicle. details as follows:

(1) The ultrasonic ranging module in front of the vehicle continuously detects the echo reflected by the vehicle in front after the ultrasonic emission, so as to measure the time difference ΔT between the ultrasonic emission and the echo reception as 0.2 seconds. The ultrasonic module calculates the corresponding sound velocity value of 344 m/s according to the current air temperature of 20°C measured by the temperature sensor. The internal processor of the module can calculate the current distance between the vehicle and the vehicle in front according to the formula S=C×ΔT/2 It is 34.4 meters.

(2) In order to save costs, the vehicle speed signal directly collects the vehicle speed value in the vehicle speedometer, which is specifically 30 m/s, that is, 108 km/h.

(3) The vehicle front collision identification module collects the distance value S between the vehicle and the vehicle in front which is input and converted by the ultrasonic sensor in front of the vehicle, and collects the vehicle speed value V ₁ input by the vehicle speed measurement module. The control system calculates that the rate of change of the vehicle distance S is -5 m/s, according to the formula It can be calculated that the front vehicle speed value V ₂ is 25 m/s. According to the formula with The control system can calculate the acceleration value a ₁ of the host vehicle as 6 m/s ² and the acceleration value a ₂ of the front vehicle as 5 m/s ² . Finally according to the formula Set T _f1 = 0.05 seconds, T _d1 = 0.05 seconds, T _z1 = 0.1 seconds, φ ₁ = 0.12, (φ ₁ = 0.12, asphalt road) can get the minimum safe distance D _r1 between the vehicle in front and the vehicle in front is 6 meters, where: D _r1 is the minimum safe distance between the vehicle in front and the vehicle in front, V ₁ is the speed of the vehicle in front, V ₂ is the speed of the vehicle in front, T _f1 is the critical time for the driver of the vehicle to react to the vehicle in front, T _d1 is the braking coordination time of the own vehicle, T _z1 is the deceleration growth time of the own vehicle, φ ₁ is the correction coefficient of the braking distance; a ₁ is the acceleration of the own vehicle, and a ₂ is the acceleration of the front vehicle; for the cement road, φ ₁ =0.06; For asphalt pavement, φ ₁ =0.12.

As shown in Figure 2, the five boundaries for car alarm and anti-collision are divided into three boundaries in front of the vehicle and two boundaries in the rear of the vehicle. The front three boundaries of the car are Front1, Front2 and Front3 respectively. Front1 means the distance D1 between the vehicle in front and the vehicle in the range of 2D _r1 < D ₁ ≤ 3D _r1 , at this time _Front1 is 12 meters to 18 meters; Front2 indicates the distance D ₁ between the vehicle in front and the vehicle in the range of D _r1 < D ₁ ≤ 2D _r1 ; at this time, Front2 is 6 meters to 12 meters; Front3 indicates that the distance D ₁ between the vehicle in front and the vehicle is in the range of 0 < D ₁ ≤ D _r1 , and Front3 is 0 meters to 6 meters at this time .

When the distance D1 between the vehicle in front and the vehicle is in the range of ₁₂ meters to 18 meters, the output terminal of the control unit sends a signal to the voice alarm module, and the voice alarm module reminds the driver "the distance between the vehicle in front and the vehicle is too close, please keep safe Vehicle distance"; when the distance D1 between the current vehicle and the vehicle ranges from ₆ meters to 12 meters, the output terminal of the control unit sends a signal to both the voice alarm module and the automatic braking module, and the voice alarm module reminds the driver to "go ahead". The distance between the vehicle and the vehicle is too close, activate the automatic brake", the automatic brake module automatically brakes the vehicle to avoid further reduction of the distance between the vehicle in front and the vehicle; the value range of the distance D ₁ between the current vehicle and the vehicle is 0 meters ~6 meters, the output terminal of the control unit sends a signal to the voice alarm module, the automatic braking module and the electromagnetic anti-collision module at the same time, and the voice alarm module reminds the driver "the distance between the vehicle in front and this vehicle is too close, start the electromagnetic anti-collision" , the automatic braking module automatically brakes the vehicle to avoid further reduction of the distance between the vehicle in front and the vehicle, and at the same time activates the electromagnetic anti-collision module to avoid collisions or reduce the degree of damage caused by collisions.

2. The working process of the second limit behind the car:

According to Figure 1, Figure 2 and Figure 4, the relative distance between the vehicle and the vehicle behind and the vehicle speed signal measured by the ultrasonic distance measuring module behind the vehicle and the vehicle speed measurement module of the vehicle are passed through the ultrasonic distance measurement module behind the vehicle and the vehicle speed signal respectively. The output end of the vehicle speed measurement module is transmitted to the input end of the vehicle rear collision recognition module. The rear collision recognition module calculates the speed of the rear vehicle and the distance between the vehicle and the rear vehicle through differential calculation according to the two input values of the relative distance between the vehicle and the vehicle behind and the vehicle speed of the vehicle, and according to the change of the relative distance with time and the change of vehicle speed with time. Acceleration of the two vehicles, and finally calculate the minimum safe distance D _r2 between the rear vehicle and the own vehicle. details as follows:

(1) The ultrasonic ranging module behind the vehicle continuously detects the echo reflected by the rear vehicle after the ultrasonic emission, so as to measure the time difference ΔT between transmitting the ultrasonic wave and receiving the echo as 0.2 seconds. The ultrasonic module calculates the corresponding sound velocity value of 344 m/s according to the current air temperature of 20°C measured by the temperature sensor. The internal processor of the module can calculate the current distance between the vehicle and the rear vehicle according to the formula S=C×ΔT/2 It is 34.4 meters.

(2) In order to save costs, the vehicle speed signal directly collects the vehicle speed value in the vehicle speedometer, which is specifically 30 m/s, that is, 108 km/h.

(3) The vehicle rear collision recognition module collects the distance value S between the vehicle and the rear vehicle input and converted by the ultrasonic sensor at the rear of the vehicle, and collects the vehicle speed value V ₁ input by the vehicle speed measurement module. The control system calculates the change rate of the vehicle distance S at -5 m/s, according to the formula It can be calculated that the vehicle speed value V ₃ of the rear vehicle is 35 m/s. According to the formula with It can be calculated that the acceleration value a ₁ of the host vehicle is 6 m/s ² and the acceleration value a ₃ of the rear vehicle is 7 m/s ² . Finally according to the formula Set T _f3 = 0.05 seconds, T _d3 = 0.05 seconds, T _z3 = 0.1 seconds, φ ₁ = 0.06, (φ ₁ = 0.06, for the cement road) can get the minimum safe distance D _r2 between the vehicle and the vehicle behind is 6 meters, where: D _r2 is the minimum safe distance between the own vehicle and the rear vehicle, V ₁ is the speed of the own vehicle, V ₃ is the speed of the rear vehicle, T _f3 is the critical time for the reaction of the driver of the rear vehicle to the own vehicle, T _d3 is the braking coordination time of the rear vehicle, T _z3 is the deceleration growth time of the rear vehicle, φ ₁ is the correction coefficient of the braking distance; a ₁ is the acceleration of the vehicle, and a ₃ is the acceleration of the rear vehicle; for the cement road, φ ₁ = 0.06; For asphalt pavement, φ ₁ =0.12.

As shown in Figure 2, the five boundaries for car alarm and anti-collision are divided into three boundaries in front of the vehicle and two boundaries in the rear of the vehicle. The two boundaries behind the car are Back1 and Back2 respectively. Back1 indicates that the distance D ₂ between the vehicle behind and the vehicle has a value range of D _r2 < D ₂ ≤ 3D _r2 , and Back1 is 6 meters to 18 meters at this time; Back2 indicates that the distance D ₂ between the vehicle behind and the vehicle has a value range of 0 <D ₂ ≤D _r2 , at this time Back2 is 0 meters to 6 meters.

When the distance D ₂ between the vehicle behind and the vehicle ranges from 6 meters to 18 meters, the output terminal of the control unit sends a signal to the voice alarm module, and the voice alarm module reminds the driver "the distance between the vehicle behind and the vehicle is too close, please keep Safety vehicle distance"; when the distance D2 between the rear vehicle and the vehicle ranges from ₀ meters to 6 meters, the output terminal of the control unit sends signals to both the voice alarm module and the electromagnetic anti-collision module, and the voice alarm module reminds the driver Or "the distance between the vehicle behind and the vehicle is too close, activate the electromagnetic anti-collision", and activate the electromagnetic anti-collision module at the same time to avoid the collision or reduce the damage of the collision.

Claims (10)

1. a kind of gauge initiative alarming anticollision device, collision-prevention device of automobile five, it is characterised in that including being collided after Chinese herbaceous peony collision recognition system, car Identifying system and five gauges judge processing system；

Chinese herbaceous peony collision recognition system includes Chinese herbaceous peony ultrasonic distance measuring module, this car vehicle speed measurement module and Chinese herbaceous peony collision recognition mould Block；

Collision recognition system includes collision recognition mould after ultrasonic distance measuring module, this car vehicle speed measurement module and car after car after car Block；

Five gauges judge that processing system includes control unit, voice alarm module, self-actuating brake module and electromagnetic anti-collision module；

Input of the output end of Chinese herbaceous peony ultrasonic distance measuring module and Ben Che vehicle speed measurement modules with Chinese herbaceous peony collision recognition module Connection；Input of the output end of ultrasonic distance measuring module and Ben Che vehicle speed measurement modules with collision recognition module after car after car Connection；Output end of the input of control unit respectively with collision recognition module after Chinese herbaceous peony collision recognition module and car is connected, control Input of the output end of unit processed respectively with voice alarm module, self-actuating brake module and electromagnetic anti-collision module is connected.

2. a kind of gauge initiative alarming anticollision device, collision-prevention device of automobile five according to claim 1, it is characterised in that Chinese herbaceous peony ultrasonic wave Range finder module is used for the distance for detecting this car and front truck；Ultrasonic distance measuring module is used for the distance for detecting this car and rear car after car； This car vehicle speed measurement module is used to gather this vehicle speed information；Chinese herbaceous peony collision recognition module is used for according to Chinese herbaceous peony ultrasonic ranging mould The output information of block and this car vehicle speed measurement module calculates the minimum safe distance D between front truck and this car_r1；Collision recognition after car Module is used to be calculated between rear car and this car according to the output information of ultrasonic distance measuring module after car and Ben Che vehicle speed measurement modules Minimum safe distance D_r2；Control unit is used for the output information according to collision recognition module after Chinese herbaceous peony collision recognition module and car One or more work in control correspondence voice alarm module, self-actuating brake module and electromagnetic anti-collision module.

3. a kind of gauge initiative alarming anticollision device, collision-prevention device of automobile five according to claim 2, it is characterised in that minimum safe distance From D_r1Calculated by following steps：

(1) Chinese herbaceous peony ultrasonic distance measuring module by constantly detect ultrasonic wave transmitting after run into the echo that front truck is reflected so that Measure transmitting ultrasonic wave and receive the time difference Δ T of echo；Chinese herbaceous peony ultrasonic wave module surveys present air according to temperature sensor Temperature calculates corresponding acoustic velocity value C, and according to formula S=C × Δ T/2, calculates this current car and front truck spacing S；

(2) this car vehicle speed measurement module directly gathers the vehicle speed value in automotive speedometer；

(3) Chinese herbaceous peony collision recognition module collects this car and front truck spacing value S that Chinese herbaceous peony ultrasonic sensor is inputted and changed, with And collect this car vehicle speed value V of this car vehicle speed measurement module input₁；According to formulaCalculate front truck vehicle speed value V₂；According to formulaWithCalculate this car acceleration magnitude a₁With front truck acceleration magnitude a₂；Finally according to formula,Draw the minimum safe spacing D of Ben Che and front truck_r1, wherein：T_f1For this Car driver is to the reaction crash time of front vehicles, T_d1For this car brake coordination time, T_z1When increasing for this car deceleration Between, φ₁For braking distance correction factor；For cement pavement, φ₁=0.06；For bituminous paving, φ₁=0.12.

4. the gauge initiative alarming anticollision device, collision-prevention device of a kind of automobile five according to claim 2, it is characterised in that current vehicle and sheet Car is apart from D₁Span is 2D_r1＜ D₁≤3D_r1When, the output end of control unit sends signal, voice to voice alarm module Alarm module reminds driver's " front truck and this car hypotelorism, please keep safe distance between vehicles "；Current vehicle is with this car apart from D_iValue Scope is D_r1＜ D₁≤2D_r1When, the output end of control unit is simultaneously emitted by both voice alarm module and self-actuating brake module Signal, voice alarm module reminds driver's " front truck and this car hypotelorism, start self-actuating brake ", and self-actuating brake module is automatic Braking processing is carried out to vehicle；Current vehicle is with this car apart from D₁Span is 0 ＜ D₁≤D_r1When, the output end of control unit to Voice alarm module, self-actuating brake module and electromagnetic anti-collision module three are simultaneously emitted by signal, and voice alarm module, which is reminded, to be driven Person's " front truck and this car hypotelorism, start electromagnetic anti-collision ", self-actuating brake module is automatic to carry out braking processing to vehicle, opens simultaneously Dynamic this car electromagnetic anti-collision module simultaneously notifies front truck to start electromagnetic anti-collision module, this car electromagnetic anti-collision module and front truck electromagnetic anti-collision mould Block polarization identical electromagnetic field, makes to produce electromagnetic repulsive force between Ben Che and front truck, it is to avoid collision occurs or reduced to touch The degree of injury hit.

5. a kind of gauge initiative alarming anticollision device, collision-prevention device of automobile five according to claim 2, it is characterised in that minimum safe distance From D_r2Calculated by following steps：

(1) after car ultrasonic distance measuring module by constantly detect ultrasonic wave transmitting after run into the echo that rear car is reflected so that Measure transmitting ultrasonic wave and receive the time difference Δ T of echo；Ultrasonic wave module surveys current air temperature according to temperature sensor Corresponding acoustic velocity value C is calculated, and according to formula S=C × Δ T/2, calculates this current car and rear car spacing S；

(2) this car vehicle speed measurement module directly gathers the vehicle speed value in automotive speedometer；

(3) collision recognition module collects this car and rear car spacing value S that ultrasonic sensor after car is inputted and changed after car, with And collect this car vehicle speed value V of this car vehicle speed measurement module input₁；According to formulaCalculate rear car vehicle speed value V₃；According to formulaWithCalculate this car acceleration magnitude a₁With rear car acceleration magnitude a₃；Finally according to formula,Draw Ben Che and the minimum safe spacing D of rear car_r2, wherein：T_f3For Rear car driver is to the reaction crash time of our vehicle, T_d3For rear car brake coordination time, T_z3When increasing for rear car deceleration Between, φ₁For braking distance correction factor；For cement pavement, φ₁=0.06；For bituminous paving, φ₁=0.12.

6. the gauge initiative alarming anticollision device, collision-prevention device of a kind of automobile five according to claim 2, it is characterised in that when rear car and this Car is apart from D₂Span is D_r2＜ D₂≤3D_r2When, the output end of control unit sends signal, voice reporting to voice alarm module Alert module reminds driver's " rear car and this car hypotelorism, please keep safe distance between vehicles "；When rear car and this car are apart from D₂Value model Enclose for 0 ＜ D₂≤D_r2When, the output end of control unit is simultaneously emitted by signal to both voice alarm module and electromagnetic anti-collision module, Voice alarm module reminds driver's " rear car and this car hypotelorism, start electromagnetic anti-collision ", while starting this car electromagnetic anti-collision Module simultaneously notifies rear car to start electromagnetic anti-collision module, and this car electromagnetic anti-collision module is identical with rear car electromagnetic anti-collision module polarization Electromagnetic field, make to produce electromagnetic repulsive force between Ben Che and rear car, it is to avoid collision occur or reduce collision degree of injury.

7. a kind of gauge initiative alarming anticollision device, collision-prevention device of automobile five according to claim 1, it is characterised in that electromagnetic anti-collision mould Block includes automobile storage battery, inverter, booster, strong current generator, rectifier and the superconducting device being sequentially connected；Automobile stores Direct current is produced in battery, by inverter, booster, strong current generator and rectifier, the direct current more than 1 kiloampere is produced In electric current feeding superconducting device, high-intensity magnetic field is produced.

8. the gauge initiative alarming anticollision device, collision-prevention device of a kind of automobile five according to claim 1, it is characterised in that Chinese herbaceous peony collision is known Collision recognition system shares this car vehicle speed measurement module after other system and car.

9. a kind of gauge initiative alarming avoiding collision of automobile five, it is characterised in that anti-based on a kind of gauge initiative alarming of automobile five Collision device, a kind of gauge initiative alarming anticollision device, collision-prevention device of automobile five, including collision recognition system after Chinese herbaceous peony collision recognition system, car System and five gauges judge processing system；

Chinese herbaceous peony collision recognition system includes Chinese herbaceous peony ultrasonic distance measuring module, this car vehicle speed measurement module and Chinese herbaceous peony collision recognition mould Block；

Collision recognition system includes collision recognition mould after ultrasonic distance measuring module, this car vehicle speed measurement module and car after car after car Block；

Five gauges judge that processing system includes control unit, voice alarm module, self-actuating brake module and electromagnetic anti-collision module；

Input of the output end of Chinese herbaceous peony ultrasonic distance measuring module and Ben Che vehicle speed measurement modules with Chinese herbaceous peony collision recognition module Connection；Input of the output end of ultrasonic distance measuring module and Ben Che vehicle speed measurement modules with collision recognition module after car after car Connection；Output end of the input of control unit respectively with collision recognition module after Chinese herbaceous peony collision recognition module and car is connected, control Input of the output end of unit processed respectively with voice alarm module, self-actuating brake module and electromagnetic anti-collision module is connected；

Chinese herbaceous peony ultrasonic distance measuring module is used for the distance for detecting this car and front truck；Ultrasonic distance measuring module is used to detect this car after car With the distance of rear car；This car vehicle speed measurement module is used to gather this vehicle speed information；Chinese herbaceous peony collision recognition module is used for according to car The output information of preceding ultrasonic distance measuring module and Ben Che vehicle speed measurement module calculates the minimum safe distance between front truck and this car D_r1；Collision recognition module is used to be calculated according to the output information of ultrasonic distance measuring module after car and Ben Che vehicle speed measurement modules after car Minimum safe distance D between rear car and this car_r2；Control unit is used for according to collision recognition after Chinese herbaceous peony collision recognition module and car The output information of module controls one or more works in correspondingly voice alarm module, self-actuating brake module and electromagnetic anti-collision module Make；

The gauge initiative alarming avoiding collision of a kind of automobile five, comprises the following steps：

1) collision recognition system monitors this car and front truck and the distance of rear car in real time after Chinese herbaceous peony collision recognition system and car, and calculates The minimum safe distance D of this car and front truck_r1With Ben Che and the minimum safe distance D of rear car_r2；

2) control unit is according to step 1) data that monitor in real time, the anticollision for carrying out this car and front truck judges and Ben Che and rear car Anticollision judge, wherein：

The anticollision of this car and front truck judges to include：Current vehicle is with this car apart from D₁Span is 2D_r1＜ D₁≤3D_r1When, control The output end of unit processed sends signal to voice alarm module, and voice alarm module reminds driver that " front truck is with this car apart from mistake Closely, safe distance between vehicles please be keep "；Current vehicle is with this car apart from D₁Span is D_r1＜ D₁≤2D_r1When, the output end of control unit Signal is simultaneously emitted by both voice alarm module and self-actuating brake module, voice alarm module reminds driver " front truck and sheet Car hypotelorism, starts self-actuating brake ", self-actuating brake module is automatic to carry out braking processing to vehicle；Current vehicle and this car distance D₁Span is 0 ＜ D₁≤D_r1When, the output end of control unit is to voice alarm module, self-actuating brake module and electromagnetic anti-collision Module three is simultaneously emitted by signal, and voice alarm module reminds driver's " front truck and this car hypotelorism, start electromagnetic anti-collision ", Self-actuating brake module is automatic to carry out braking processing to vehicle, while starting this car electromagnetic anti-collision module and notifying front truck to start electromagnetism Anticollision module, this car electromagnetic anti-collision module and front truck electromagnetic anti-collision module polarization identical electromagnetic field, make front truck and Ben Che Between produce electromagnetic repulsive force, it is to avoid collision occur or reduce collision degree of injury；

This car and the anticollision of rear car judge to include：When rear car and this car are apart from D₂Span is D_r2＜ D₂≤3D_r2When, control The output end of unit sends signal to voice alarm module, voice alarm module remind driver " rear car and this car hypotelorism, It please keep safe distance between vehicles "；When rear car and this car are apart from D₂Span is 0 ＜ D₂≤D_r2When, the output end of control unit is to language Both sound alarm module and electromagnetic anti-collision module are simultaneously emitted by signal, and voice alarm module reminds driver " rear car and this spacing From excessively near, start electromagnetic anti-collision ", while starting this car electromagnetic anti-collision module and notifying rear car to start electromagnetic anti-collision module, this car Electromagnetic anti-collision module and rear car electromagnetic anti-collision module polarization identical electromagnetic field, make to produce electromagnetism row between Ben Che and rear car Repulsion, it is to avoid the degree of injury of collision occurs or reduced for collision.

10. a kind of gauge initiative alarming avoiding collision of automobile five according to claim 9, it is characterised in that minimum safe Apart from D_r1Calculated by following steps：

(1.1) Chinese herbaceous peony ultrasonic distance measuring module by constantly detect ultrasonic wave transmitting after run into the echo that front truck is reflected, from And measure transmitting ultrasonic wave and receive the time difference of echo_ΔT；Chinese herbaceous peony ultrasonic wave module surveys present air according to temperature sensor Temperature calculates corresponding acoustic velocity value C, and according to formula S=C × Δ T/2, calculates this current car and front truck spacing S；

(1.2) this car vehicle speed measurement module directly gathers the vehicle speed value in automotive speedometer；

(1.3) Chinese herbaceous peony collision recognition module collects this car and front truck spacing value S that Chinese herbaceous peony ultrasonic sensor is inputted and changed, And collect this car vehicle speed value V of this car vehicle speed measurement module input₁；According to formulaCalculate front truck car Fast value V₂；According to formulaWithCalculate this car acceleration magnitude a₁With front truck acceleration magnitude a₂；Finally according to formulaDraw the minimum safe spacing D of Ben Che and front truck_r1, wherein：T_f1For this Car driver is to the reaction crash time of front vehicles, T_d1For this car brake coordination time, T_z1When increasing for this car deceleration Between, φ₁For braking distance correction factor；Wherein, for cement pavement, φ₁=0.06；For bituminous paving, φ₁=0.12；

Minimum safe distance D_r2Calculated by following steps：

(2.1) after car ultrasonic distance measuring module by constantly detect ultrasonic wave transmitting after run into the echo that rear car is reflected, from And measure transmitting ultrasonic wave and receive the time difference Δ T of echo；Ultrasonic wave module surveys present air temperature according to temperature sensor Degree calculates corresponding acoustic velocity value C, and according to formula S=C × Δ T/2, calculates this current car and rear car spacing S；

(2.2) this car vehicle speed measurement module directly gathers the vehicle speed value in automotive speedometer；

(2.3) collision recognition module collects this car and rear car spacing value S that ultrasonic sensor after car is inputted and changed after car, And collect this car vehicle speed value V of this car vehicle speed measurement module input₁；According to formulaCalculate rear car speed Value V₃；According to formulaWithCalculate this car acceleration magnitude a₁With rear car acceleration magnitude a₃；Finally according to formulaDraw Ben Che and the minimum safe spacing D of rear car_r2, wherein：T_f3For Rear car driver is to the reaction crash time of our vehicle, T_d3For rear car brake coordination time, T_z3When increasing for rear car deceleration Between, φ₁For braking distance correction factor；Wherein, for cement pavement, φ₁=0.06；For bituminous paving, φ₁=0.12.