CN201380837Y

CN201380837Y - Vehicle anti-collision and automatic protection device

Info

Publication number: CN201380837Y
Application number: CN200920041577U
Authority: CN
Inventors: 董琦琦; 蒋丽媛; 朱晓庆; 高福信
Original assignee: Nanjing University of Information Science and Technology
Current assignee: Nanjing University of Information Science and Technology
Priority date: 2009-04-03
Filing date: 2009-04-03
Publication date: 2010-01-13
Anticipated expiration: 2019-04-03

Abstract

The utility model provides a vehicle anti-collision and automatic protection device, which can give early warnings when a vehicle is in danger and take emergency protective measures, so as to effectively reduce the occurrence probability of traffic accidents and guarantee the safety of the vehicle and people inside. The device comprises a laser distance meter, a high-speed A/D converter, a DSP control single-chip microcomputer, a Sunplus single-chip microcomputer, an audible and visual alarm unit, an LCD display module and a brake control unit. The laser distance meter measures the data of the distance between the vehicle and a vehicle running ahead, and the data is transmitted through the high-speed A/D converter to the DPS control single-chip microcomputer, which compares the measured data and a prestored safety distance. If the data is smaller than the safety distance, the DSP control single-chip microcomputer outputs signals to the Sunplus single-chip microcomputer on one hand, so that the Sunplus single-chip microcomputer can control the audible and visual alarm unit to send out alarm signals; and on the other hand, the DSP control single-chip microcomputer monitors the distance between the two vehicles and sends commands to start up the brake control unit for braking when the distance reaches the collision critical value. The LCD display module is for displaying relevant data.

Description

The collision prevention of vehicle automatic safety device

Technical field:

The utility model relates to a kind of safety device of vehicle, relates in particular to a kind of automobile active anticollision device based on DSP technology and laser ranging technique combination, in order to the safety of member and vehicle itself in the assurance car.

Background technology:

At present, the automobile collision preventing technology is divided into passive type and active two kinds crashproof two kinds.Strengthen the structure (as giving automotive front and the equal frame of the afterbody frame of insuring) of automobile, driving safety band and safety air bag etc. are installed, these all belong to the anti-collision device for automobile of passive mode, loss when they can only reduce the collision case generation to a certain extent, the generation that can not fundamentally avoid traffic accident.Thereby, very active since people in 1971 in research aspect the active automobile anti-collision technique, and specialized field to active vehicle anticollision systematic study has appearred thereupon.But till today, also there is very big bottle-neck zone on for active vehicle anticollision systematic research in up-to-date technology, can not accomplish that abundant actv. initiatively defends collision.

Now on the market,, only rest on, initiatively prevent on the single aspect of a chain of research of colliding of vehicle for active safety air bag about the initiatively research of collision avoidance system of vehicle.And be applied in correlation technique on the automobile anti-rear end collision accident, and be only limited on conventional confguration, utilize the radar velocity measurement instrument, thereby car speed is limited by the control oil pump, manually take the method for braking.

And the application of Radar Technology is immature relatively now, has certain exploitativeness in the short-range monitoring of vehicle.But for the whole process monitoring aspect of long-time vehicle, weak tendency comparatively then.Its reason is as follows:

1) some cheap equipment are because of the problem of frequency range and sensitivity, and the effect of radar velocity measurement is bad, and the good relatively cost on price of effect is bigger, can not widespread use.

2) radar velocity measurement is subjected to jamming performance relatively poor.

3) square being directly proportional of radar velocity measurement distance decayed, so distance is far away more, reflection can super sonic reduce, sensitivity descends very fast, thereby makes the radar ranging mode only be applicable to than short range.It is about 4 meters～5 meters that at present domestic and international general radar ranging is discussed desirable measuring distance, because generally can only be used for the reversing automobile collision avoidance system, exploitativeness is little in the crash-proof application of active.

The generation of ordinary accident, the overwhelming majority is taking place because of under the situation of chaufeur self general idea, general time of origin is at 1-5 between second, and above-mentioned automobile anti-rear end collision system, what adopt is be main mode to remind, and needs the artificial mode of slowing down or braking, and supposes that chaufeur self do not notice system alert, initiatively vehicle is not slowed down and brake, vehicle just still exists and knocks into the back and the danger of accident.Therefore this type systematic self is to have certain technical bottleneck.

Summary of the invention:

The utility model is at existing technology status; a kind of collision prevention of vehicle automatic safety device is provided, and this device is at vehicle and carries out early warning under the dangerous situation, and can take emergency safeguard measure; thereby effectively reduce the probability of occurrence of traffic accident, support vehicles and occupant's safety.

The purpose of this utility model realizes by following measure:

A kind of collision prevention of vehicle automatic safety device, it is characterized in that: this device comprises laser rangefinder, high-speed a/d converter, the DSP control single chip computer, the Ling Yang micro controller system, acousto-optic warning unit, LCD display module and brake control unit, front truck that described laser rangefinder records and the range information between the car, by sending into the DSP control single chip computer behind the high-speed a/d converter, the DSP control single chip computer will record data and compare with the safety distance that prestores, surpass safety distance, the DSP control single chip computer outputs signal to the Ling Yang micro controller system, Ling Yang Single-chip Controlling acousto-optic warning unit sends alerting signal, the DSP control single chip computer is monitored two car spacings when colliding critical value, sends instruction and starts the braking of brake control unit; The LCD display module shows related data.

Described acousto-optic warning unit comprises red high strength light-emitting diode and loud speaker.

The model of described Ling Yang micro controller system adopts SPCE061A); The model of described DSP control single chip computer adopts TMS320LF2407.

The brake control unit adopts master cock to be connected in series into the vehicle braked circuit.

The utility model has following advantage compared to existing technology:

The collision prevention of vehicle full-automatic protection device of the utility model research; at when driving, the complete monitoring speed of a motor vehicle is utilized the principle of laser ranging; and in conjunction with the dsp chip technology; the distance of being surveyed is differentiated,, in time give the alarm when two following distances during near the transformation point maxim of collision distance; and take the deceleration measure automatically; when two car spacings during near the minimum value of collision distance transformation point, take emergency braking automatically, actv. prevents the generation of vehicle safety accident.

Remarkable advantage of the present utility model is that the distance and the relative velocity of car front vehicles can be provided in real time, and can make prediction, before sending, danger carries out early warning, in case of emergency starting gas stops, avoid the generation of accident to the full extent, rather than as traditional when accident takes place, just taking measures, thereby can effectively reduce the probability of occurrence of traffic accident, the safety of member and vehicle itself in the service truck.

Description of drawings:

Fig. 1 is a functional block diagram of the present utility model.

Fig. 2 is a self-actuating brake control principle instruction diagram of the present utility model.

Fig. 3 is control process figure of the present utility model.

The specific embodiment:

The utility model will be further described below in conjunction with accompanying drawing:

As shown in Figure 1 and Figure 2, collision prevention of vehicle automatic safety device of the present utility model comprises: laser rangefinder, high-speed a/d converter, DSP control single chip computer, Ling Yang micro controller system, acousto-optic warning unit, LCD display module and brake control unit.It adopts the laser measurement spacing, and the cascade of DSP control single chip computer and A/D converter, Ling Yang micro controller system (SPCE061A) is as the common processing signals of controller.The maximum receiving range of laser rangefinder is 128M.The prompting alarm module is made up of audio alert loud speaker and high brightness LED.The laser signal projector is installed on vehicle front.The utility model calculates the possibility whether vehicle has collision by the rate of change (relative velocity) of continuous measuring vehicle relative distance.The brake gear of warning reduces the probability that vehicle bumps against if might just be started immediately.

Wherein, laser rangefinder records front truck and the range information between the car, by the high-speed a/d converter analog signal is converted into digital signal, send into the DSP control single chip computer behind the range signal of output, the DSP control single chip computer compares safety distance information that prestores in range signal and its, surpasses safety distance, and the DSP control single chip computer outputs signal to the Ling Yang micro controller system, Ling Yang Single-chip Controlling loud speaker is reported to the police and the high brightness LED flicker, sends alerting signal.The DSP control single chip computer is monitoring two car spacings in real time, when arriving the collision critical value of setting, send instruction and start the braking of brake control unit, autobrake brake.The LCD display module shows the vehicle of vehicle front and the distance of car, with itself and the relative velocity of car, can allow chaufeur hold.

Realization about self-actuating brake control is the example explanation with red flag CA7220 type car vacuum servo servo braking system (Fig. 2), and 1 is fluid reservoir among the figure; 2 is the servo vacuum air chamber; 3 is master brake cylinder; 4 is control cock; 5 is brake treadle mechanism; 6 is the stop, tail and number plate light hydraulic efficiency pressure switch; 7 is vacuum check valve; 8 is left front wheel cylinder; 9 is the vacuum energy supplying pipeline; 10 is load sensing valve; 11 is left back wheel cylinder.

With the control circuit two ends path in parallel of the stop, tail and number plate light hydraulic efficiency pressure switch of this car and this path control its conducting by the brake control unit, so just can repack in the situation that original automobile can only manually be braked can be according to the programmed decision self-actuating brake.Only need find the brake lamp switch of automobile for other vehicles, this switch is controlled in parallel one the road insert in the circuit of the present utility model and get final product, why adopt parallel connection to be because according to circumstances oneself also will can start brake except the programmed decision chaufeur that need brake.

Collision prevention of vehicle automatic safety device of the present utility model can be loaded into the original brake system of vehicle, at vehicle an indicator lamp is installed and is in time carried out brake operation with the warning driver; Warn invalid back to start the brake gear of warning and force brake deceleration, guarantee vehicle and personal safety.

As shown in Figure 3, the comprehensive automatic safety device of vehicle of the present utility model, its control process comprise with step:

A) the described control setup of initialization is provided with ride safety of automobile early warning distance s0, spacing s, time t0, t1, t2, t3, t4, frequency X1, X2, speed V1, V2;

B) adopt the laser transimitter of laser rangefinder to send laser signal, record time of return t, try to achieve spacing s;

C) the spacing signal of being surveyed by step b judge vehicle whether safe early warning apart from s0 in;

D) when vehicle distances the described safe early warning of step c apart from s0 in, enter step f;

E) when vehicle distances not the described safe early warning of step c apart from s0 in, enter step b;

F) red light is bright, and every t1 Time Calculation speed v continues the t2 time, calculates average relative v1 in the t2 time;

G) judge v1 whether can cause spacing less than safe early warning apart from s0;

1.) not; Cancel all measures of warning, enter step c;

2.) be; Enter step h;

H) red light glimmers with X1HZ, and loudspeaker are reported to the police, the t3 s that finds range after the time;

I) judge whether vehicle slows down;

1.) be that t4 surveys relative speed of a motor vehicle v after the time, enter step g;

2.) not, enter step j;

J) red light glimmers with X2HZ, and loudspeaker are reported to the police, and braking automobile starts, and urgent flashing lamp is bright before and after the car.

Claims

1, a kind of collision prevention of vehicle automatic safety device, it is characterized in that: this device comprises laser rangefinder, high-speed a/d converter, the DSP control single chip computer, the Ling Yang micro controller system, acousto-optic warning unit, LCD display module and brake control unit, front truck that described laser rangefinder is measured and the range information between the own car, and behind the high-speed a/d converter, send into the DSP control single chip computer, the DSP control single chip computer will record data and prestore security information relatively, surpass safety distance, the DSP control single chip computer outputs signal to the Ling Yang micro controller system, Ling Yang Single-chip Controlling acousto-optic warning unit sends alerting signal, the DSP control single chip computer is monitored two car spacings when colliding critical value simultaneously, sends instruction and starts brake control unit emergency braking vehicle; The LCD display module shows related data.

2, collision prevention of vehicle automatic safety device according to claim 1 is characterized in that: described acousto-optic warning unit comprises red high strength light-emitting diode and loud speaker.

3, collision prevention of vehicle automatic safety device according to claim 1 is characterized in that: the model of described Ling Yang micro controller system adopts SPCE061A); The model of described DSP control single chip computer adopts TMS320LF2407.

4, collision prevention of vehicle automatic safety device according to claim 1, it is characterized in that: the control signal of described brake control unit is connected in series into the vehicle braked circuit.

5, collision prevention of vehicle automatic safety device according to claim 1 is characterized in that: laser rangefinder is arranged on the front part of vehicle outside.