CN2141783Y

CN2141783Y - Rear- and front-view anticollision device for car

Info

Publication number: CN2141783Y
Application number: CN 92220545
Authority: CN
Inventors: 张可
Original assignee: Individual
Current assignee: Individual
Priority date: 1992-10-12
Filing date: 1992-10-12
Publication date: 1993-09-08
Anticipated expiration: 2002-10-12

Abstract

The utility model discloses a rear-and front-view anticollision device for car belonging to the safe mobile device of collision prevention when the car encounters obstructions backwards and forwards, which is composed of an electric power source 11, an ultrasonic emission circuit 1, an ultrasound receiving circuit 2, counting circuits 3, 4 and display circuits 5, 6. The utility model is characterized in comprising a magnetic receiving circuit 7, a speed decoding circuit 8, a composite circuit 9 and a drive circuit 10. The rear-and front-view anticollision device for the car displays distance between the car and the obstructions and the running speed of the car by numerical codes, reminds the caution of drivers through a sounder, can do automatically brake in emergency, prevents the collision of the obstructions, and avoids the occurrences of traffic accidents.

Description

Rear- and front-view anticollision device for car

The utility model relates to a kind of automotive rear-view forward sight anticollision device, and it belongs to automobile and meets the crash-proof vehicle safe driving device of front and back obstacle.

Since automobile has been arranged, growing along with the highway communication transit industry, running safety just becomes the major issue that people are concerned about, so the various devices relevant with vehicle safety travel occurred.A kind of distance-finding method and device have been announced among the Chinese patent CN1041654A, produce two kinds of different slightly pseudo random signals of shape same period earlier, first pseudo random signal emission relevant output with second pseudo random signal after target reflection receives is relatively measured range-to-go by output time.A kind of range finder for car rear obstacle of announcing among the Chinese patent CN1045865A, form by ultrasonic transmit circuit, super sonic acceptor circuit, binary pair, count pulse generator, range counter, nixie display, can provide the distance of obstacle behind car to chaufeur, the prompting chaufeur is taken care, has the digital function that shows, this device range finding result only does digital the demonstration, there is not sound prompting, also not having the speed of a motor vehicle shows, prevent to collide and whether brake or manually brake to have only and operate by chaufeur, can not self-actuating brake.

The purpose of this utility model is to design a kind of automotive rear-view forward sight anticollision device, not only measure the distance of automobile and front and back obstacle, show by number, and by the sound prompting chaufeur, and measure the moving velocity of automobile at that time, both signals carry out compound comparison, can make automobile automatic brake, prevent collision.

The utility model automotive rear-view forward sight anticollision device, form by power supply 11, ultrasound emission circuit 1, ultrasonic acceptor circuit 2,

counting circuit

3,4, display circuit 5,6, it is characterized in that it also has by being installed on the magnetic acceptor circuit 7 that the permanent magnet S on the wheel W, integrated Hall circuit IC14, resistance R 31 are formed; Decipher braking circuit 8 by integrated six reverser IC21, the speed formed with door IC22～26, with door IC27～29,555 ICs 30, diode D7, resistance R 41～42, capacitor C 35～36, sounder Y1; By integrated six Nverter circuit IC31, with door IC32～37, form compound circuit 9 with door IC38～40,555 ICs 41, R43～44, capacitor C 37～38, diode D8, sounder Y2; Also have by the driving circuit of forming with door IC42,555 ICs 43, aerotron BG6, diode D9, resistance R 45～47, capacitor C 39～40, electromagnetic valve DF 10.

Press the utility model design-calculated automotive rear-view forward sight anticollision device, can measure distance, the automobile driving speed of automobile and front and back obstacle, and by digital demonstration, sound prompting chaufeur, but according to both signal comparative result self-actuating brakes, thereby prevent the generation of collision case, guarantee vehicle safe driving.

The utility model has following accompanying drawing:

Fig. 1 is the outside drawing of this device;

Fig. 2 is the circuit block diagram of this device;

Fig. 3 is the schematic circuit diagram of this device power circuit 11;

Fig. 4 is the schematic circuit diagram of the ultrasound emission circuit 1 of this device;

Fig. 5 is the schematic circuit diagram of the ultrasonic acceptor circuit 2 of this device;

Fig. 6 is the schematic circuit diagram of the counting circuit 3 of this device;

Fig. 7 is the former road figure of circuit of the display circuit 5 of this device;

Fig. 8 is the schematic circuit diagram of the magnetic acceptor circuit 7 of this device;

Fig. 9 is the schematic circuit diagram of the counting circuit 4 of this device;

Figure 10 is the schematic circuit diagram of the display circuit 6 of this device;

Figure 11 is the schematic circuit diagram of the speed decoding braking circuit 8 of this device;

Figure 12 is the schematic circuit diagram of the compound circuit 9 of this device;

Figure 13 is the schematic circuit diagram of the driving circuit 10 of this device.

Embodiment of the present utility model is described with reference to the accompanying drawings.Figure 1 shows that the outside drawing of automotive rear-view forward sight anticollision device, be connected and installed in circuit in the casing and be loaded in the operator's compartment of vehicle by circuit block diagram shown in Figure 2.

The ultrasound emission circuit as shown in Figure 4, it is made up of IC1～IC3, SW1, SW2, resistance R 1～R4, capacitor C 3～C7, K switch 1～1, K2～1.Wherein IC1, IC2 adopt 555 integrated circuit, the modulation signal that IC1 produces 15.5HZ is added on 4 pin of IC2, the 3 pin outgoing carrier frequencies of IC2 are the tonal signal that is subjected to of 40KHZ, being added in central frequency after the buffering by six anti-device IC3 is ultrasonic transmitter SW1, the SW2 of 40KHZ, by on-off switch K1～1, K2～1 control, SW1 launches backward, and SW1 launches forward, after SW1, SW2 are installed in car respectively, before the car, be connected with circuit with 4 core cables.Ultrasonic acceptor circuit as shown in Figure 5, it is made up of IC4～IC6, aerotron BG1, diode D1, D2, ultrasonic receiver SW3, SW4, K switch 1～K2, K2～2, resistance R 5～R19, capacitor C 8～C14.Ultrasonic receiver SW3, SW4 receive behind the car or the echoed signal of the obstacle before the car, low noise preamplifier through BG1 improves signal to noise ratio, carry out voltage gain through integrated amplifier IC4, IC5, by D1, D2 envelope detection, comparator IC6 shaping is exported with transmitting and is compared the echo pulse that has certain time-delay.

Counting circuit 3 shown in Figure 6, by CD4011 NAND gate IC7～IC10, CD4069 six reverser IC11, CD4553 counting machine IC12, CD4511 decoder IC13, diode D3, D4, resistance R 20～R23, capacitor C 15～C18 forms, IC7～IC9 forms R～S trigger point, echo pulse is imported to IC7, the f1 that transmits transports to IC8 by 4 pin of IC2 and detects T delay time, gate pulse as counting machine IC12, produce the count pulse of the signal f3 of 17.2KHZ by two reversers among the six reverser IC11 as IC12, the count value that obtains distance is exported from IC12, one the road delivers to compound circuit 9, and one the tunnel makes and gives display circuit 5 after the IC13 decoding and make distance indication.Display circuit 5 as shown in Figure 7, common cloudy charactron LED1, LED2, aerotron BG2, BG3, resistance R 24～R30 by two redness form, import through R24～R30 respectively from the decoded signal of IC13 output, the base stage of BG2 is connected to 15 pin of IC12, the base stage of BG3 is connected to 1 pin of IC12, demonstration number on the LED1 is a rice, and the last demonstration of LED2 number is a decimetre.

Magnetic acceptor circuit 7 as shown in Figure 8, form by permanent magnet S, the CS839 HALL-IC IC14, the resistance R 31 that are bonded on the wheel W, be bonded at permanent magnet on the wheel with wheel, wheel whenever circles and just IC14 is triggered once, IC14 just produces a pulse Y at R31, pulse number is exactly the revolution of wheel, delivers to counting circuit 4.Counting circuit 4 is given CD4011 NAND gate IC16 by 555 ICs, 15 output timing pips as shown in Figure 9, and pulse width is corresponding with wheel circumference.The pulse Y of IC14 output delivers to CD4553 counting machine IC18 by IC16 and carries out the speed counting behind NAND gate IC17 in the timing pip width, IC19 delivers to display circuit 6 through the CD4511 decoder.Figure 10 shows that display circuit 6, cloudy charactron LED3, LED4, aerotron BG4, BG5, resistance R 34～R40 form altogether by two greens, import through R34～R40 respectively from the decoded signal of IC19 output, the BG4 base stage is connected to 1 pin of IC18, the base stage of BG5 is connected to 2 pin of IC18, the last demonstration of LED3 number is 10 kilometers/hour, and the last demonstration of LED4 number is kilometer/hour.

Speed decoding braking circuit 8 as shown in figure 11, form by CD4069 six reverser IC21, CD4068 and door IC22～IC26, CD4072 and door IC27～IC29,555 ICs 30, diode D7, resistance R 41～R42, capacitor C 35, C36, sounder Y1, from the speed count pulse of IC18 output through six reverser IC21, obtain V0, V1 with a door IC22～IC29, four velocity output signals of V2, V3 are delivered to compound circuit 9, when the speed of a motor vehicle is 80 kilometers/hour, the IC30 starting of oscillation, sounder Y1 sends the hypervelocity audible ringing signal and reminds the driver.

Compound circuit 9 as shown in figure 12, by CD4069 six reverser IC31, CD4068 door IC32～IC37, CD4072 and door I38～IC40,555 ICs 41, diode D8, resistance R 43～R44, capacitor C 37, C38, sounder Y2 forms, IC12 output imports to IC31 apart from count pulse from counting machine 3, the V0 of output from speed decoding braking circuit 8, V1, V2, V3 speed is the input with door IC32～IC36, realize the compound of speed signal and range signal, thereby obtaining to work as the speed of a motor vehicle is 30 kilometers/hour, and automobile and obstacle are apart from 3 meters inside brakes; When the speed of a motor vehicle is higher than 20 kilometers/hour, automobile and obstacle are moving apart from 2 metric systems; When the speed of a motor vehicle is higher than 10 kilometers/hour, automobile and obstacle are apart from 1 meter inside brake; When the speed of a motor vehicle at 10 kilometers/hour, automobile and obstacle are moving apart from 0 to 0.9 metric system; When automobile and obstacle during apart from 8 meters, time base circuit 555 starting of oscillations are by Y2 sound prompting chaufeur, so that perform emergent preparation in advance.

Driving circuit 10 as shown in figure 13, form by CD4072 and door IC42,555 IC circuit 43, aerotron BG6, diode D9, resistance R 45～R47, capacitor C 39, C40, electromagnetic valve DF, L＜1m, the L＜2m of compound circuit 9 output, L＜3m, L＜4m speed-slackening signal are as the input of IC42, through IC43 time-delay broadening, become the speed-slackening signal of t=2～3 second, because the drive current of electromagnetic valve generally needs 0.5A～1A, therefore drive signal is carried out the electric current amplification through BG6, thereby drives the electromagnetic valve action.When having little time to step on service brake, anticollision device is had an effect, the electromagnetic valve action, and with the gas circuit conducting between air reservoir and the brake drum air chamber, the brake drum brake, thus prevent to collide.

Power circuit 11 is made up of MC7809 three terminal regulator IC44, capacitor C 1, C2 as shown in Figure 3, with the positive 12V of automobile level through the IC44 voltage stabilizing at the Vcc operating voltage of 9V as each circuit.

Claims

1, a kind of automotive rear-view forward sight anticollision device is made up of power supply 11, ultrasound emission circuit 1, ultrasonic acceptor circuit 2, counting circuit 3,4, display circuit 5,6, it is characterized in that:

A), it is by by being installed on the magnetic acceptor circuit 7 that the permanent magnet S on the wheel W, integrated Hall circuit IC14, resistance R 31 are formed;

B), by the speed decoding scheme of forming by integrated six reverser IC21, with door an IC22～IC29,555 ICs 30, diode D7, resistance R 41～R42, capacitor C 35, C36, sounder Y1 8;

C), by the compound circuit of forming by integrated six reverser IC31, with door an IC32～IC40,555 ICs 41, resistance R 43, R44, capacitor C 37, C38, diode D8, sounder Y2 9;

D), also has the driving circuit of forming with door IC42,555 ICs 43, aerotron BG6, diode D9, resistance R 45～R47, capacitor C 39, C40, electromagnetic valve DF by integrated 10.