CN2538031Y

CN2538031Y - Traffic signal identifying controller

Info

Publication number: CN2538031Y
Application number: CN 02224706
Authority: CN
Inventors: 支录奎; 李岩; 苟亚萍
Original assignee: BAOJI PUBLIC SECURITY BUREAU
Current assignee: Zhejiang Tongqu Technology Co., Ltd.
Priority date: 2002-03-28
Filing date: 2002-03-28
Publication date: 2003-02-26
Anticipated expiration: 2012-03-28

Abstract

The utility model relates to a traffic signal distinguishing and control device used for the control of vehicle passing signals in crossroads of urban road traffic. The utility model is provided with a signal control machine (4) that can control the opening and closing of red light, yellow light and green light, and is characterized in that: vehicle quantity information from east, west, south and north directions is respectively collected by a sensor and input to a signal processing circuit to control the signal control machine. The utility model is provided with functions of judging and recognizing the number of vehicles on roads, and flexibly controls traffic lights according to different vehicle conditions; green light can be turned on when vehicle quantity on roads is large and red light can be turned on when vehicle quantity is small in the control time stipulated by the period; green light time will be longer if the vehicle quantity is large and shorter if the vehicle quantity is small, and the decisions of turning left, direct driving and turning right are also judged according to vehicle flow.

Description

Traffic signals identification control instrument

Technical field

The utility model belongs to the urban road transportation control technical field.Specifically, be a kind of traffic signals identification control instrument.

Background technology

Along with the development of Chinese national economy and going from strength to strength of auto industry, the vehicular traffic in city grows with each passing day, and this pressure to urban road is increasing, except that building viaduct and enlarging road, improving the utilization factor of existing road, is that transport solution stops up unique practical ways.For many years, by situation analysis, current focal issue of outstanding existence: signal lamp does not have recognition function, such as east-west direction car is arranged, and signal red light is bright, and North and South direction does not have car, but is that green signal light is bright from crossroad, urban district vehicle.So this this phenomenon occurs, be because traditional traffic signals controller is the variation of periodicity, regularity, to the four direction vehicle what or have or not and can not distinguish, the time that signal lamp is bright and the flow of vehicle have no relation, the having that it's too late flow can not be coordinated of signal lamp and vehicle, causing the utilization factor of road to descend, is the major reason of traffic jam.

Summary of the invention

The utility model institute purpose provides a kind of traffic signals identification control instrument, should have and judge and what function of identification travels down vehicle, can control flexibly according to East, West, South, North different directions vehicle condition, in the control time of period defining, have car just to give a green light, no car just sends out a warning; Car is many, and green time is just long, and the few green time of car is just short, and turning left, keeping straight on, turning right also is to judge according to vehicle flowrate.

Specifically, a kind of traffic signals identification control instrument that urban highway traffic crossroad vehicle traffic signal is controlled of being used for, signal controlling machine (4) with control red light, amber light, green light break-make, its key are to utilize sensor to gather in the vehicle fleet size information input signal treatment circuit in each current direction of East, West, South, North respectively and control signal controller thus.

Sensor is divided into No. 1 sensor (6) and No. 2 sensors (5) and monitors the quantity of sending a car before the stop line simultaneously in the utility model.Like this, when first sensor monitors will the trigger pip controller sends out a warning to the no car signal of some current directions and by treatment circuit in a flash, if this moment this direction suddenly vehicle to pass through, then having second forward sensor of detection position, to detect this send a car signal and input processing circuit trigger pip controller green light in advance bright.

Signal processing circuit in the utility model is made up of reverser (1), gate circuit (2), counter delay device double D trigger (3), two sensors (5,6) connect reverser (1) input end, reverser (1) two output terminal connects gate circuit (2) sum counter delayer double D trigger (3) respectively, gate circuit (2) output termination counter delay device double D trigger (3) also links to each other with greensignal light simultaneously, and counter delay device double D trigger (3) output terminal inserts signal controlling instrument (4).

Sensor can adopt multiple mode in the utility model, as the imageing sensor (as video camera) of images acquired signal, ultrasonic sensor, induction pick-up etc.

The utility model principle of work is:

When between east and west when green light is bright, be high level " 1 ", no Che Shiwei low level " 0 " on No. 1 sensor, no Che Shiwei low level " 0 " on No. 2 sensors, because of east-west direction does not have car, it is irrational giving a green light, when two sensors are found not have vehicle simultaneously, sensor send a high level signal " 1 " by reverser to gate circuit, when green light is bright, the current potential of green light itself is exactly high level signal " 1 ", and this signal is also given gate circuit, and gate circuit produces a high potential signal and gives double D trigger, force the east-west direction signal lamp by the green light lamp that reddens by double D trigger again, after green light reddened, red light duration length was given counter by reverser other end high level signal " 1 ", and counter comes the time of control lag.When if the vehicle numeral that counter adds up reaches the clearance vehicle number of regulation, delayer finishes to postpone red light and lights the time, and it is bright to recover green light.North and South direction is a red light, if east-west direction occurs not having the car phenomenon once more, green light can redden at once, and North and South direction green light can occur again.It is current that circulation has just formed a complete signal identification so repeatedly.Shunting control recognition principle is identical with the direction recognition principle, if both direction all has under the situation of car, gives a green light for earlier the many directions of car, when four direction does not all have car, has a direction person of sending a car current earlier suddenly.

Description of drawings

Accompanying drawing is the utility model principle schematic.

Embodiment 1:

A kind of traffic signals identification control instrument, signal controlling machine 4 (adopting general signal controlling instrument now) with control red light, amber light, green light break-make utilizes No. 1 sensor 6 and No. 2 sensors 5 to gather in the vehicle fleet size information input signal treatment circuit in the current direction of two intersections respectively and control signal controller thus.Signal processing circuit is made up of reverser 1 (can adopt CDFQ-6 type integrated circuit), gate circuit 2 (CDML-12 type integrated circuit), counter delay device double D trigger 3 (CDJYS-12 integrated circuit), two sensors 5,6 connect reverser 1 input end, 1 liang of output terminal of reverser connects gate circuit 2 sum counter delayer double D triggers 3 respectively, gate circuit 2 output termination counter delay device double D triggers 3 also link to each other with greensignal light simultaneously, and counter delay device double D trigger 3 output terminals insert signal controlling instrument 4.Sensor adopts induction pick-up (as optoelectronic induction sensor, pressure transducer etc.), and it is arranged on the interior two ends of crossroad stop line certain distance (as 15 meters) scope, gather and arrive the quantity information for the treatment of by regional vehicle, this information is imported in the treatment circuit, sent the bright time of this direction red light according to what signal deciding signal controlling machine of vehicle by treatment circuit.

Embodiment 2: change the induction pick-up in the embodiment 1 into video camera, obtain each current direction vehicle image and obtain quantity information, be input to signal processing circuit.

Embodiment 3: change the sensor in the embodiment 1 into can transmit and receive ultrasonic signal ultrasonic sensor, be input to signal processing circuit by ultrasonic listening and collection vehicle number signal.

Claims

1, a kind of traffic signals identification control instrument that urban highway traffic crossroad vehicle traffic signal is controlled of being used for, signal controlling machine (4) with control red light, amber light, green light break-make is characterized in that utilizing sensor to gather in the vehicle fleet size information input signal treatment circuit in each current direction of East, West, South, North respectively and control signal controller thus.

2, traffic signals identification control instrument according to claim 1 is characterized in that sensor is divided into No. 1 sensor (6) and No. 2 sensors (5) and monitors the quantity of sending a car before the stop line simultaneously.

3, traffic signals identification control instrument according to claim 1, it is characterized in that signal processing circuit is made up of reverser (1), gate circuit (2), counter delay device double D trigger (3), two sensors (5,6) connect reverser (1) input end, reverser (1) two output terminal connects gate circuit (2) sum counter delayer double D trigger (3) respectively, gate circuit (2) output termination counter delay device double D trigger (3) also links to each other with greensignal light simultaneously, and counter delay device double D trigger (3) output terminal inserts signal controlling instrument (4).

4, traffic signals identification control instrument according to claim 1 and 2 is characterized in that sensor (5,6) is the imageing sensor of images acquired signal.

5, traffic signals identification control instrument according to claim 1 and 2 is characterized in that sensor (5,6) is a ultrasonic sensor.

6, traffic signals identification control instrument according to claim 1 and 2 is characterized in that sensor (5,6) is an induction pick-up.