CN102568216A

CN102568216A - Intelligent bidirectional anti-loitering anti-following vehicle detection device

Info

Publication number: CN102568216A
Application number: CN2012100457126A
Authority: CN
Inventors: 王建一; 周翔; 郑斌; 韦可高
Original assignee: HONGMEN ADVANCED TECHNOLOGY Corp; BENGBU INVESTMENT GROUP Co Ltd
Current assignee: HONGMEN ADVANCED TECHNOLOGY Corp; BENGBU INVESTMENT GROUP Co Ltd
Priority date: 2012-02-27
Filing date: 2012-02-27
Publication date: 2012-07-11
Anticipated expiration: 2032-02-27
Also published as: CN102568216B

Abstract

The invention relates to a vehicle detection device for passageways of vehicle management places such as a parking lot and the like. The device is formed by two induction coils, two electronic vehicle detectors, a microprocessor and an interface chip. When a vehicle passes through the induction coils buried under the ground by 5cm, inductances of the coils are changed and are detected by the electronic vehicle detectors, wherein the direction from A to B represents the forward direction (enter) and the direction from B to A represents the reverse direction (exit). When the vehicle loiters on the induction coils, according to a microprocessor technology adopted by the device, signals of the electronic vehicle detectors are input by interfaces, and programs are controlled by the interfaces to shield noneffective signals and screen out effective enter and exit signals, so that the reliable vehicle detection device is provided for the passageways of the vehicle management places such as various parking lots and the like. Due to the adoption of the reasonable sizes of the induction coils and the reasonable installation size as well as the utilization of auxiliary facilities such as a speed reduction roadblock and the like, the fault generated due to close following of vehicles can be effectively avoided.

Description

A kind of intelligent two-way anti-anti-vehicle detection apparatus of closelying follow of pacing up and down

Technical field

The present invention relates to the vehicle detection apparatus of vehicle management gateways, place such as parking lot.This invention is a kind of intelligent vehicle pick-up unit that adopts microprocessor technology to have the signal screening function, has the two-way anti-anti-function of closelying follow of pacing up and down.

Background technology

The gateway vehicle detection in vehicles such as present parking lot management place generally only is made up of inductive coil and electronic vehicle detecting device.In actual use, when on vehicle is being embedded in the inductive coil on the face of land, pacing up and down, can produce wrong vehicle and go into out signal, cause controlling malfunctioning, as: car statistics is wrong etc.

Summary of the invention:

The object of the invention is exactly the defective that exists to present electronic type wagon detector, adopts singlechip technology, and a kind of two-way anti-anti-intelligent vehicle pick-up unit of closelying follow of pacing up and down is provided.

Because adopted rational inductive coil size and installation dimension and adopted auxiliary equipment such as slowed down road-block, vehicle can effectively be avoided immediately following the mistake of generation.

To achieve these goals, the present invention has adopted following technical scheme:

A kind of intelligent anti-anti-vehicle detection apparatus of closelying follow of pacing up and down; Comprise that one is formed the track supervisor by microprocessor and interface chip; The track supervisor connects electronic vehicle detecting device A, electronic vehicle detecting device B respectively, corresponding respectively ground induction coil A, the ground induction coil B that is arranged side by side that connect of electronic vehicle detecting device A, electronic vehicle detecting device B;

When the vehicle admission or when vehicle appears on the scene; Through ground induction coil A and ground induction coil B; This moment, the inductance value of ground induction coil A and B changed; Electronic vehicle detecting device A catches the variation of ground induction coil inductance value and becomes a switching value to pass to the track supervisor through interface chip this conversion of signals with electronic vehicle detecting device B, and the microprocessor in the supervisor of track is judged the signal of going into or going out that obtains vehicle according to the state of the switching value of electronic vehicle detecting device A and B output through program.

In the time of the vehicle admission, vehicle at first passes through ground induction coil A, passes through ground induction coil B then, then leaves ground induction coil A, leaves ground induction coil B, finally accomplishes whole admission action.Otherwise when vehicle is withdrawn from the arena, vehicle will at first pass through ground induction coil B, pass through ground induction coil A then, then leave ground induction coil B, leave ground induction coil A at last, and final completion appears on the scene and moves.Microprocessor detects ground induction coil A just in real time, the state of ground induction coil B, thereby the admission and the appearance situation of judgement vehicle.

Ground induction coil be system catch automobile storage a very important sensor, its principle of work is: the groove of 5 ~ 10CM degree of depth of cutting on the face of land, be of a size of 20*80cm, in grooving, twine 4 ~ 6 circle copper cash, thereby form an air core inductor.When local sense coil top does not have vehicle; The value of inductance value is very little; And when vehicle is positioned at the ground induction coil top; Because the chassis of vehicle is a metallic object, the inductance value of ground induction coil can increase a lot, so whether the variation of base area sense winding inductance quantity has vehicle above just can telling ground induction coil.

The effect of electronic vehicle detecting device is the variation of the seizure ground induction coil inductance value of acumen; When vehicle is positioned at the ground induction coil top; The electronic vehicle detecting device detects the great variety of ground induction coil sensibility reciprocal; Judging has vehicle to be positioned at the ground induction coil top this moment, thereby this conversion of signals is become a switching value, passes to the track supervisor.

Whether we can judge at gateway place through ground induction coil has automobile storage to exist, and is the movement locus that can not identify vehicle but only use a ground induction coil: actually or the vehicle admission appears on the scene.In should using; System has used two inlet ground to feel the running orbit that locks vehicle, and the distance of two ground senses has certain requirement, and at first this distance can not be greater than a vehicle commander; Otherwise just lost the effect of judging the vehicle operating direction; Can not generally should feel between the width less than certain distance simultaneously on 2 ~ 3 ground, otherwise the operate as normal of the system that can interfere with that intercouples between two feeling.The judgement principle of system is:

Go into field direction: the running orbit of vehicle is continuous, and therefore in the time of the vehicle admission, vehicle is necessary feels A through inlet ground earlier, and then through inlet ground sense B, then feels A with leaving, and sense B is judged as admission afterwards with leaving;

The direction of withdrawing from the arena: the running orbit of vehicle is continuous, so vehicle is when withdrawing from the arena, and vehicle must be earlier through ground sense B, and then through ground sense A, then sense B feels A with leaving with leaving, accomplishes the whole action of withdrawing from.

Comprise a microprocessor in the supervisor of track, be used for monitoring the state exchange of two feeling in real time, thereby effectively judge admission, the appearance of vehicle.In vehicle admission and appearance; Vehicle may be because of certain situation, advancing and withdraw from repeatedly, and this phenomenon is called the phenomenon of pacing up and down; The state that microprocessor is felt according to two ground can effectively shield the signal of the phenomenon of pacing up and down, the correctly running orbit of monitoring vehicle.

Advantage of the present invention:

The present invention compared with prior art, its remarkable advantage is:

(1) microprocessor technology of the present invention's employing shields invalid signals, filters out and effectively go into out signal through the signal of interface input electronic vehicle detecting device and through the interface control program;

(2) coil dimension of the microprocessor technology of the present invention's employing and science and installation dimension etc. can effectively solve the two-way anti-anti-problem of closelying follow of pacing up and down.

Description of drawings:

Fig. 1 is the composition frame chart of apparatus of the present invention;

Fig. 2 is the state machine transition diagram of apparatus of the present invention;

Fig. 3 is the vehicle admission synoptic diagram of apparatus of the present invention;

Fig. 4 is the vehicle appearance synoptic diagram of apparatus of the present invention;

Embodiment:

Below in conjunction with accompanying drawing the best example of implementing of the present invention is described in further detail:

Accompanying drawing 1 is the composition frame chart of apparatus of the present invention, is made up of ground induction coil A, ground induction coil B, electronic vehicle detecting device A, electronic vehicle detecting device B and track supervisor.Accompanying drawing 2 is the state machine transition diagram of apparatus of the present invention, comprised a state machine in the supervisor program of track and come monitoring ground sense A in real time, the state of ground sense B, according to before and current states come to judge accurately the turnover situation of car two.In the state machine of system works, Sn representes the duty that system is present, and A B representes inlet ground sense A, inlet ground sense B respectively, and 1 expression triggers, and 0 expression discharges.Whether Y represents the vehicle admission or appears on the scene effectively, and 0 representative is invalid, and 1 represent successfully entering, and 2 represent successfully and withdraw from.

The function of this device is for detecting the admission and the appearance of vehicle, effectively mask simultaneously vehicle in the gateway direction pace up and down repeatedly and the interference that produces, principle of work is following:

At initial time, ground sense A, ground sense B top does not all have vehicle; Therefore sense A is 0 with the state of ground sense B, and system began to detect vehicle and at first triggered which ground sense this moment, if vehicle triggers ground sense A earlier; Then prove vehicle and want admission, get into admission recurrent state machine, with triggering if vehicle is at first felt B; Prove that then vehicle is to appear on the scene, and then gets into appearance recurrent state machine.

Go into field direction, the running orbit of vehicle is shown in accompanying drawing 3, and according to vehicle and ground sense A, the relative position of ground sense B can be divided into 4 beats to admission, is respectively:

S0: vehicle is prepared to march into the arena, and does not feel A as yet, the moment of ground sense B with touching;

S1: vehicle has begun to get into the moment of having triggered ground sense A;

S2: vehicle further gets into, and has triggered ground sense A simultaneously, the moment of ground sense B;

S3: vehicle further gets into, and has left ground sense A, still feels the moment of B top with being positioned at;

S0: vehicle gets into fully, has left ground sense A, the moment of ground sense B.

When system detects vehicle and wants admission, can be known by accompanying drawing 2, then be transformed into state S1 by state S0, the beat according to above vehicle admission carries out in real time; The phenomenon that the vehicle admission begins to withdraw from half the time may take place midway; In admission, triggering sense A in ground such as vehicle, (state S2) begins to withdraw from the time of ground sense B; Discharged ground sense B; Program will have state S2 and convert S1 to this moment, and promptly system can be according to repeatedly the pace up and down phenomenon then automatically state of Adjustment System of vehicle in the porch, thereby judge the running orbit of vehicle accurately.

System is positioned at the S0 state, when detecting vehicle and at first triggered ground sense B, then gets into vehicle and withdraws from the arena the cycle of states machine shown in accompanying drawing 2, and vehicle is withdrawn from the arena synoptic diagram shown in accompanying drawing 4.

The running orbit that vehicle is withdrawn from the arena also can be divided into 4 beats:

S0: vehicle is prepared to withdraw from the arena, and does not trigger the moment of ground sense B as yet;

S5: vehicle is withdrawn from the arena, and has triggered ground sense B, and does not trigger the moment of ground sense A as yet;

S6: vehicle is withdrawn from the arena, and has triggered ground sense A simultaneously, the moment of ground sense B;

S7: vehicle is further withdrawn from the arena, and has discharged ground sense B, and keeps triggering the moment of ground sense A;

S0: vehicle is withdrawn from the arena fully, has discharged ground sense B simultaneously, the moment of ground sense A.

When system detects vehicle and will withdraw from, then be transformed into state S5 by state S0, the beat that withdraws from according to above vehicle in real time carries out; Vehicle may take place midway withdraw from the phenomenon that begins to advance half the time; When withdrawing from, triggering sense A in ground such as vehicle, (state S6) begins to advance in the time of ground sense B; Discharged ground sense A; Program will have state S6 and convert S5 to this moment, and promptly system can be according to repeatedly the pace up and down phenomenon then automatically state of Adjustment System of vehicle in the porch, thereby judge the running orbit of vehicle accurately.

Claims

1. intelligent two-way anti-pacing up and down prevented immediately following vehicle detection apparatus; It is characterized in that: comprise that one is formed the track supervisor by microprocessor and interface chip; The track supervisor connects electronic vehicle detecting device A, electronic vehicle detecting device B respectively, corresponding respectively ground induction coil A, the ground induction coil B that is arranged side by side that connect of electronic vehicle detecting device A, electronic vehicle detecting device B;

As vehicle process ground induction coil A or ground induction coil B; The inductance value of ground induction coil A or B changes; Electronic vehicle detecting device A and electronic vehicle detecting device B convert this inductance value variable signal to a switching value; Pass to the track supervisor through interface chip, the microprocessor in the supervisor of track is judged the signal of going into or going out that obtains vehicle through program.