CN2232375Y

CN2232375Y - Pre-alarm device for snub

Info

Publication number: CN2232375Y
Application number: CN 94219876
Authority: CN
Inventors: 洪裕盛
Original assignee: Individual
Current assignee: Individual
Priority date: 1994-08-30
Filing date: 1994-08-30
Publication date: 1996-08-07
Anticipated expiration: 2004-08-30

Abstract

The utility model relates to a pre-alarm device for emergency brake, which is mainly composed of a position discriminator, an encoder/decoder, a transmitter, a receiver, an impact inductive switch and an alarm. When a high-speed running vehicle is braked in an emergency, the impact inductive switch acts under high-speed inertia effect and triggers the transmitter to transmit encoded addressed signals. The encoded addressed signals received by a vehicle behind are decoded, the alarm is driven to act if the received direction codes are accordant with the direction of the vehicle and the alarm does not act if the received direction codes are not the same as the direction of the vehicle. Thus, vehicles running in the same direction are alarmed. Vehicles which are at a certain distance away in the front and are braked in an emergency can be decelerated in time or take adequate measures, so that traffic accidents can be avoided.

Description

Emergency brake is alarm device in advance

The utility model relates to a kind of emergency brake alarm device in advance, belongs to the safety control facility in the vehicle '.

In the quick or express highway up train of keeping straight on, be easy to generate overtaking collision accident or the continuous overtaking collision traffic accident except not keeping suitable spacing at present, another major reason is:

Though 1 has kept suitable spacing, but chaufeur is not watched front vehicle position (as seeing back mirror or elsewhere) attentively because of distraction or eyes, front truck has tracked tramping sudden stop, but this chaufeur can't convey to brain by eyes at once and do suitably and timely reaction, thereby causes the accident of overtaking collision front truck to take place.

2, when laager travels, especially in the laager of full size vehicle, except the afterbody of seeing last car, other vehicle conditions that move ahead are not understood fully.If a car emergency brake is arranged, each car of back all must be treated could react in regular turn behind the stoplight stop lamp of last car bright (reaction), but this moment is probably very near and very dangerous apart from front truck, even causes continuous overtaking collision traffic accident.Its reason is exactly the generation of vigilance accident at once and in time take suitable reactive measures.

The purpose of this utility model provides a kind of emergency brake alarm device in advance.

Control circuit of the present utility model includes the direction distinguishing device as vehicle heading identification foundation, the coder/decoder of orientation, direction distinguishing device place and company numbering password being encoded and the password that receives being decomposed by demoder, the projector of transmit coded signals, the receptor that the reception projector transmits and impact inductive switch and the alarm device whether launched with the ON/OFF decision projector of its switch is characterized in that: be provided with analogue to digital conversion and the layout thereof that can carry out azimuth coding in its control circuit, judge and the providing and launch of warning signal---the microprocessor chip of reception time schedule control; The direction distinguishing device is by a magnetic variationization and change the earth inductor of its magnetic flow everywhere, one provides the fixed current source to earth inductor pri constant current source, and the amplifying circuit that the secondary small flux change of earth inductor is amplified and will amplify after the flux change amount carry out digitized A and D converter and form; Wherein the output of direction distinguishing device is connected to the RAO-RA3 pin end of CPU, impacts inductive switch and links to each other with the 4th pin of projector and CPU respectively, and CPU also links to each other with projector, receptor by the carrier generator IC chip.Wherein be provided with the projector of launched microwave signal backward.

Great advantage of the present utility model is to allow the vehicle in the fast running in time know the place ahead if the vehicle in distance is in " emergency brake " state, allow chaufeur make timely and suitable reaction if having time, generation that cuts down traffic accidents with Huang and the tragedy of as far as possible avoiding continuous overtaking collision.

Fig. 1 is the control circuit figure of the utility model preferred embodiment.

Fig. 2 is the direction distinguishing device circuit diagram of the utility model preferred embodiment.

Fig. 3 is the rough schematic of the earth inductor of the utility model preferred embodiment.

Principle of work of the present utility model is to utilize an other device of orientation system to distinguish the travel direction of vehicle, again with the azimuth coding of coder with direction distinguishing device place, and impact inductive switch as the shake-up source with one, when it is subjected to the inertia effects that produces at a high speed and when moving, above-mentioned coding is launched with the projector carrier system, and after the receptor of other vehicles receives, through decoding and will encode and the travel direction of vehicle compares contrast, as the foundation of driving alarm device.

Specific practice is that the orientation with vehicle itself is divided into some five equilibriums, the orientation of each five equilibrium gives different heading codes, again this heading code is sent out via radio transmission, make at the equidirectional vehicle that travels and to receive this brake signal, the vehicle of different directions then can't receive, to reduce meaningless interference.

Consult shown in each figure, the utility model mainly includes:

One, direction distinguishing device, it is mainly as the foundation of vehicle heading identification, and these parts include:

1, earth inductor (FLUX GATE) T1: earth inductor can change its magnetic flow because of earth magnetism, and during local magnetic variation, the level coil can produce the signal of magnetic flow subtle change secondarily, and it usually then can maintain the fixedly numerical value of magnetic flow; Its secondary two groups of coils twine with level or vertical two kinds of directions usually, and nationality is to take out earth magnetism (consulting Fig. 3), comprising the earth magnetism of thing, north and south both direction.

2, constant current source 1: it is mainly used in provides a fixed current source elementary to earth inductor T1, makes earth inductor T1 can produce the magnetic flow of a standard.Its circuit is mainly given to close and is formed by transistor Q3, Q4, Q5, Q6, Q7, Q8, be connected to the RA3 pin of microprocessor CPU by a resistance R 33, this pin position is used for the ON/OFF constant current source, to avoid making that because of earth inductor T1 magnetic saturation the numerical error of measuring is too big.

3, amplifying circuit: the small flux change amount that earth inductor T1 produces is amplified via this circuit, wherein amplifying circuit comprises two groups of first amplifying circuit (U1A, U1C, U2A) and second amplifying circuits (U1B, U1D, U2B), the ON/OFF of thing and north and south earth magnetism then controls via the RA2 pin of microprocessor CPU, and the magnitude of voltage that recorded last time is removed, to avoid producing error because of capacitor charge time is long.

4, A and D converter (A/D CONVER): it mainly is with the flux change amount digitalisation after amplifying, and judges the orientation to make things convenient for CPU; This circuit all is provided with A/D converter at the RA1 of microprocessor CPU pin and RAO pin in chip.

Two, emitting/receiving: consult Fig. 1, projector local oscillation 415MHZ has directivity as carrier wave, not forward not backward; Receptor is modulated at the frequency of 415MHZ for its reception, and effectively transmitting range is good with 200～300 meters.The utility model preferably adopts the microwave mode emission, and it points to effect can be better, and certainly, the utility model also can adopt the radio wave transmission of any wavelength.

The orientation sign indicating number of company's numbering password, car is to cooperate microprocessor CPU to come A wire A2～A4 of controlled encoder U1 via coder U1, just launch the coding of above-mentioned both institute's combinations, or a coding that receives decomposites, whether correctly judge, carry out the foundation of its action command simultaneously as CPU, its action is when impulse interference wave switch moves, and the some seconds errorless orientation sign indicating numbers of preceding judgement are sent, if emission and reception while are to launch preferential action.

Three, coder/decoder: main effect is that the car orientation at direction distinguishing device place and company are numbered password in conjunction with coding, or the sign indicating number that receives is decomposed.Each pin function of coder U1 is: A1～A2: receive the control command from CPU; A5～A12: client or company's identification code layout and setting; Whether SEL: impact inductive switch and move, from then on pin obtains signal; Be low level as action, carry out launch intruction, as high level, carry out receiving function usually as motionless; INP: the sign indicating number after demodulation, whether pin enters coder and proofreads correct thus; OUT: company, client, orientation password thus human hair combing waste penetrate and to go.

Four, impact inductive switch: this switch there is no effect when brake usually, surpasses certain speed and work as the speed of a motor vehicle, when emergency brake, its impulsive force is during greater than certain numerical value, impact inductive switch just from OFF → ON, when impulsive force returns to appropriate value,, removed just again from ON → OFF.

Five, alarm device: it mainly is warning and informs in the preceding vehicle existing " emergency brake " situation, allows chaufeur note and does appropriate reaction if having time, except adopting the sound alarm device, also can use or cooperate other alarm device that adapts to use together.

When impacting the inductive switch action, projector is launched the number of being compiled, the receptor of other vehicle of back row receives after decoding, interpretation, if the orientation conforms to, then will touch alarm device, otherwise alarm device is failure to actuate, guaranteeing can receive the signal of emergency brake at the vehicle that travels in the same way, and not in the same way or oppositely directed vehicle can not be interfered.

Six, CPU: above-mentioned device, circuit all are layout and the judgements of being carried out the orientation sign indicating number by a microprocessor CPU, the sequential of the providing of warning signal, and control emission---reception.

Claims

1, a kind of emergency brake is alarm device in advance, its control circuit includes the direction distinguishing device as vehicle heading identification foundation, the coder/decoder that the orientation that the direction distinguishing device is given and company's numbering password are encoded and the password that receives decomposed by demoder, the projector of transmit coded signals, the receptor that the reception projector transmits and impact inductive switch and the alarm device whether launched with the ON/OFF decision projector of its switch is characterized in that: be provided with analogue to digital conversion and the layout thereof that can carry out azimuth coding in its control circuit, judge and the providing and launch of warning signal---the microprocessor chip of reception time schedule control; The direction distinguishing device is by a magnetic variationization and change the earth inductor of its magnetic flow everywhere, one provides the fixed current source to earth inductor pri constant current source, and the amplifying circuit that the secondary small flux change of earth inductor is amplified and will amplify after the flux change amount carry out digitized A and D converter and form; Wherein the output of direction distinguishing device is connected to the RAO-RA3 pin end of CPU, impacts inductive switch and links to each other with the 4th pin of projector and CPU respectively, and CPU also links to each other with projector, receptor by the carrier generator IC chip.

2, emergency brake as claimed in claim 1 alarm device in advance is characterized in that: wherein be provided with the projector of launched microwave signal backward.