CN201808556U - Intelligent anti-collision system of automobiles in multiple road conditions - Google Patents

Abstract

The utility model belongs to the field of safe running of automobiles, in particular to an intelligent multi-road condition anti-collision system for automobiles. The system consists of a rangefinder, speedometer, acceleration sensor, memory, controller, liquid crystal display, voice alarm, photoelectric alarm, and braking device. The input end is connected; the output end of the controller is respectively connected with the liquid crystal display, the voice alarm, the photoelectric alarm, and the braking device. The utility model can accurately detect the road condition and the driving posture of the car, and when the car encounters a dangerous moment and the driver does not take corresponding measures in time to avoid a car accident, the emergency braking device allows the car to stop before the traffic accident occurs, thereby Protect the life and property safety of drivers and passengers.

Description

Automobile multi-road condition intelligent collision avoidance system

Technical field:

The utility model relates to an intelligent multi-road condition anti-collision system for automobiles, which belongs to the field of safe driving of automobiles. In particular, it is a multi-road condition intelligent anti-collision system for automobiles that automatically avoids collisions with vehicles or obstacles ahead during driving. The device can be installed before the new car is produced and leaves the factory, and the existing car can also be easily refitted.

Background technique:

Automobile accidents occur frequently nowadays, which brings great tragedy to many families, and also brings serious losses to the country and society. Traffic safety has become an obstacle to the development of the automotive industry. Therefore, avoiding the occurrence of automobile collision accidents is a major event that benefits the country and the people, and allowing automobiles to stop before collision accidents occurs is the ultimate solution to the problem. So how do you stop the car before the accident happens? At present, automobiles mainly rely on manual operation of the brake system to operate. But practice has proved that this has become a major hidden danger to automobile safety. Because the occurrence of many traffic accidents is because the car encounters dangerous moments and the driver does not take corresponding measures in time to avoid traffic accidents, there are also people who operate the brake system or the brake system of the car body itself fails, which leads to traffic accidents. In view of this, there are already many technologies about ensuring the safe driving of automobiles, but there are not many that can be popularized and applied. The main reason is that there are still many problems to be solved in these technologies. Such as the Chinese patent whose application number is 200820300142.X, what introduced is the automobile anti-collision system, although this system solves the problem that the driver does not have time to operate, but only considers the speed of the automobile itself in calculating the safety braking distance of the automobile, and does not take into account the The braking acceleration of the car is different due to the different driving road conditions, so it is not accurate to calculate the safe braking distance of the car in this way. The Chinese patent application No. 200810110412.5 introduces a car collision avoidance system. This invention only turns on the control system when the car is in a critical moment, and the control system turns on the anti-collision buffer system again, and does not prevent the car collision from happening. Of course, there are also devices such as airbag protection devices and automobile bumpers to protect the safety of life and property of drivers and passengers. These devices are in fact a passive protection method. Because these devices just play a real role when only an accident occurs, and these devices only reduce the harmfulness of collision accidents, and do not avoid the occurrence of automobile collision accidents in time. Therefore, it is very necessary to design a system device that can intelligently and effectively avoid traffic collision accidents under various road conditions.

Utility model content:

The purpose of the utility model is exactly to propose a kind of automobile multi-road condition intelligent anti-collision system aiming at the problems existing in the prior art. The device can automatically record data such as vehicle acceleration, relative speed, and the distance between the vehicle and the vehicle or obstacle in front, and automatically process the data to accurately judge whether driving is safe. The measures are to prevent the automatic opening of the brake device when the automobile collision accident occurs.

The technical scheme that the utility model adopts is:

An intelligent anti-collision system for automobiles with multiple road conditions, the system includes a rangefinder, a speedometer, an acceleration sensor, a memory, a controller, a liquid crystal display, a voice alarm, a photoelectric alarm, and a braking device, wherein the rangefinder and the speedometer , acceleration sensor and memory are all connected to the input end of the controller; the output end of the controller is respectively connected to the liquid crystal display, voice alarm, photoelectric alarm and braking device. Wherein said range finder is an ultrasonic distance measuring sensor, the speed finder is an ultrasonic relative speed speed finder, said controller is a single-chip microcomputer or a PLD controller, and the photoelectric alarm is an indicator light.

The system first collects the relevant data of the current vehicle driving through the rangefinder, speedometer, and acceleration sensor, and transmits these data to the controller, and then the controller processes the received data to obtain the vehicle driving under the current road conditions. safe distance. After that, the controller judges whether the car is in a safe driving state through calculation and analysis, and intelligently turns on the brake device to prevent the occurrence of car collision accidents when the car encounters a dangerous moment and the driver does not take corresponding measures in time to avoid car collision accidents.

The beneficial effects of the utility model are: in bad weather such as rain, snow, fog, icing, etc., the utility model can accurately detect the road surface condition and the driving state of the car, and the driver does not take corresponding measures in time when the car encounters danger Avoid turning on the brake device urgently when a car collision accident occurs, so that the car can stop before the car collision accident occurs, thereby protecting the life and property safety of the driver and passengers. The utility model is an intelligent control system, which can also prevent automobile collision accidents caused by drunk driving and fatigue driving.

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

Description of drawings:

Fig. 1 is the structural representation of the utility model

Fig. 2 is the connection diagram of the utility model and the braking system

Fig. 3 is the program block diagram of the utility model test computer

Detailed ways:

As shown in Figure 1, the multi-road condition intelligent collision avoidance system of a car includes a rangefinder 1, a speedometer 2, an acceleration sensor 3, a memory 4, a controller 5, a liquid crystal display 6, a voice alarm 7, a photoelectric alarm 8, and a braking device 9. Wherein rangefinder 1, speedometer 2, acceleration sensor 3, memory 4 are all connected with the input end of controller 5; 9 connected.

The system starts automatically when the car starts, and the console is provided with a switch and a switch indicator light. If the indicator light is on, the utility model is in an open state, otherwise the utility model is in a closed state.

The range finder 1 is an ultrasonic distance measuring sensor, which is installed directly in front of the vehicle. It is composed of a transmitter and a receiver. The transmitter emits ultrasonic waves, and the receiver receives ultrasonic waves reflected from the detected object. According to the speed V _wave of the detection signal and the time difference t _wave of transmitting and receiving ultrasonic waves, the _distance L between the car and the vehicle or obstacle in front can be obtained = (V _wave × t _wave )/2, and the range finder 1 will The actual distance _L between the vehicle or obstacle in front is transmitted to the controller 5 . Velocimeter 2 is an ultrasonic relative speed velocimeter, which is installed directly in front of the car. It is composed of a transmitting end and a receiving end. The transmitting end emits ultrasonic waves, and the receiving end receives ultrasonic waves reflected from the detection object. According to the frequency of the transmitted ultrasonic wave and the frequency of the received ultrasonic wave reflected from the detection object and the Doppler effect, the relative speed V _relative between the car and the vehicle or obstacle in front can be obtained. The speedometer 2 then transmits the relative speed V _relatively to the controller 5 . The acceleration sensor 3 is installed in a sensor system module of the vehicle. The acceleration sensor is used to detect the braking acceleration of the vehicle under the current road conditions, and transmits the braking acceleration a of the vehicle under the current road conditions to the controller 5 . The memory 4 is installed near the brake master cylinder of the vehicle head, and is mainly used to store the real-time braking acceleration a of the vehicle collected by the acceleration sensor, and transmit the acceleration to the controller 5 .

The controller 5 is a single-chip microcomputer or PLD controller, which is installed in the driver's control room of the car. It mainly calculates and analyzes the information collected by each detection system, and sends out the next step instruction in due course. The information collected by each detection system mainly includes the distance L between the car and the _vehicle or obstacle in front, _{the relative} speed V, and the braking acceleration a of the car under the current road conditions. The controller 5 calculates _the safe driving distance L of the vehicle under the current road conditions according to the formula L=V ² /2a. The controller 5 compares the distance L between the vehicle and the vehicle or _obstacle in front measured in real time by the range finder 1 with the safe driving _distance L of the vehicle under the current road conditions. If L _thing ＞kL _safety (1＜k＜1.5), automobile is in safe running condition, and this moment this system only shows the automobile driving state under the current road condition on liquid crystal display 6, as automobile braking acceleration a, relative velocity V _relative , The distance L to the vehicle or _obstacle in front and _the safe driving distance L of the car under the current road conditions. , if L _safety < L _matter ≤ k L (1 < k < 1.5), the car is running close to a dangerous state, at this time the controller 5 will issue a warning command, and the voice alarm 7 will automatically broadcast the safe driving of the car under the current road conditions The distance _is L, and the system will automatically reduce the driving speed of the car under the current road conditions _to V, _{which is} the preset maximum braking speed to ensure that the driver is in a safe state under emergency braking. If L _is less than or _equal to L, the car is in a dangerous state and the driver has not taken corresponding measures to prevent the car from colliding, the system will skip the _{process of} decelerating to the safe braking speed V, and automatically turn on the voice and photoelectric alarm Brake device 9 prevents automobile from colliding with vehicles in front or obstacles.

The connection diagram between the utility model and the braking system is shown in Figure 2. The multi-road condition intelligent anti-collision system of the automobile is closely connected with the braking system through the bus to form a closed-loop system, which can monitor the actual distance between the automobile and the front vehicle or obstacle in real time. Calculate the safety distance of the car brake. When the actual measured distance is less than the safety distance, the brake system will be activated to prevent car collision accidents, thereby ensuring the safety of the driver and passengers' lives and property.

Fig. 3 is the program block diagram of the utility model test computer. As shown in the figure, the system is initialized. If the car brakes, the statement under YES is executed, that is, the acceleration sensor collects the braking acceleration a under the current road condition, otherwise the statement under NO is executed, that is, the acceleration stored in the memory is called, and the controller is used by each detection system. After calculating and analyzing the collected data _{such as} the relative speed V, the _distance L to the vehicle or obstacle in front, the controller will take corresponding control instructions according to the corresponding situation. If _L > kL, _execute the statement under YES, that is, the liquid crystal display will display the normal driving status of the car under the current road conditions, such as the acceleration of the car, relative speed, the distance to the vehicle or obstacle in front, and the safe driving distance of the car under the current road conditions , otherwise execute the sentence under NO, that is, judge whether the L _object is less than or equal to kL _safety (1<k<1.5), if _the L matter≤kL _safety , then the sentence after YES, that is, the controller 5 sends a warning command, and the voice alarm 7 automatically Broadcast the safe driving distance _L of the car under the current road conditions, and the system will automatically reduce the driving speed of the car under the current road conditions to _V , _{which is} the preset maximum brake to ensure that the driver is in a safe state under emergency braking speed. Otherwise, execute the statement under NO, that is, judge whether _L is less than or equal to _L , if _{L is} ≤ _L , execute the statement under YES, that is, the system will skip the _process of decelerating to the safe braking speed V, and automatically turn on the voice and photoelectric alarm And start braking device 9, otherwise carry out the statement under NO, promptly system can return to initial state automatically, carry out this process in cycle.

From the above, we can see that for various road conditions under severe weather such as rain, snow, fog, and icing, the utility model can detect the driving state of the vehicle in real time, and obtain the safe driving distance under various road conditions in real time. When approaching the safe driving distance, the utility model will give the driver a multi-directional warning through the liquid crystal display, the voice alarm, and the photoelectric alarm. The utility model can automatically turn on the voice and photoelectric alarm and start the brake device, so that the car can stop before the collision, and fundamentally avoid the occurrence of the car collision accident.

The devices involved in the utility model are all sold in the market, and the utility model can conveniently refit existing automobiles.

What is not mentioned in the present invention is applicable to the prior art.

Claims (5)

1. an automobile multi-road condition intelligent anti-collision system is characterized in that the system also includes a rangefinder, a speedometer, an acceleration sensor, a memory, a controller, a liquid crystal display, a voice alarm, a photoelectric alarm, and a braking device, wherein the The distance meter, speedometer, acceleration sensor and memory are all connected to the input end of the controller; the output end of the controller is respectively connected to the liquid crystal display, voice alarm, photoelectric alarm and braking device. 2. The automobile multi-road condition intelligent collision avoidance system as claimed in claim 1, characterized in that said rangefinder is an ultrasonic rangefinder. 3. The automobile multi-road condition intelligent collision avoidance system as claimed in claim 1, characterized in that said speedometer is an ultrasonic relative speed speedometer. 4. The automobile multi-road condition intelligent collision avoidance system as claimed in claim 1, characterized in that said controller is a single-chip microcomputer or a PLD controller. 5. The multi-road condition intelligent collision avoidance system for automobiles as claimed in claim 1, wherein said photoelectric alarm is an indicator light.

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