CN106611502A

CN106611502A - Novel traffic light control circuit

Info

Publication number: CN106611502A
Application number: CN201510699892.3A
Authority: CN
Inventors: 赵燕
Original assignee: Individual
Current assignee: Individual
Priority date: 2015-10-26
Filing date: 2015-10-26
Publication date: 2017-05-03

Abstract

The invention provides a novel traffic light control circuit. According to the invention, vehicles on two intersecting roads, namely, a lane I and a lane II, are required to run alternatively, the passing time is set to be 25 seconds each time, the yellow light is required to be turned on for 5 seconds, and then a running lane can be transformed; and the yellow light is required to blink once per second when the yellow light is on. The invention is implemented as follows: a novel traffic light control circuit is constructed and characterized by mainly comprising a controller, a timer, a decoder and a second pulse signal generator; the second pulse signal generator is a standard clock signal source of the timer and the controller in the system, the decoder outputs control signals for two groups of signal lights and drive the signal lights to operate after passing through a driving circuit, the controller is a main part of the system and controls operations of the timer and the decoder; the second pulse signal generator is connected with the controller and the timer; the controller is connected with the decoder; and the decoder is connected with the signal lights.

Description

Novel traffic light control circuit

Technical field

The present invention relates to a kind of novel traffic light control circuit.

Background technology

Traffic lights are seen everywhere, and the smooth communication for traffic provides powerful guarantee；For the control circuit of signal lamp, control circuit plays very important control action, therefore, control circuit receives much concern；A kind of novel traffic light control circuit of simple structure is provided for this by improving here.

The content of the invention

It is an object of the invention to here provides a kind of novel traffic light control circuit；First track and the vehicle alternate run on the intersecting roads of two, second track are required, each transit time is all set to 25 seconds, it is desirable to amber light first bright 5 seconds, operation track could be converted；When amber light is bright, it is desirable to which each second is glittering once.

The present invention is achieved in that a kind of novel traffic light control circuit of construction, it is characterised in that：It is mainly made up of controller, timer, decoder and pps pulse per second signal generator；Second pulse generator is the standard clock signal source of timer and controller in the system, decoder exports the control signal of two groups of signal lamps, signal lamp work is driven Jing after drive circuit, controller is the major part of system, by the work of its control timer and decoder；The second pulse generator is connected with controller, timer；Controller is connected with decoder；Decoder is connected with signal lamp.

It is an advantage of the current invention that：Novel traffic light control circuit of the present invention；It is mainly made up of the part such as controller, timer, decoder and pps pulse per second signal generator.Second pulse generator is the standard clock signal source of timer and controller in the system, decoder exports the control signal of two groups of signal lamps, signal lamp work is driven Jing after drive circuit, controller is the major part of system, by the work of its control timer and decoder.

Description of the drawings

The theory diagram of Fig. 1 traffic light control systems

Fig. 2 is timer circuit figure

Fig. 3 controller logic figures.

Specific embodiment

Below in conjunction with accompanying drawing 1-3, the present invention is described in detail, and the technical scheme in the embodiment of the present invention is clearly and completely described, it is clear that described embodiment is only a part of embodiment of the invention, rather than the embodiment of whole.Based on the embodiment in the present invention, the every other embodiment that those of ordinary skill in the art are obtained under the premise of creative work is not made belongs to the scope of protection of the invention.

As Figure 1-3, a kind of novel traffic light control circuit, it is characterised in that：It is mainly made up of controller, timer, decoder and pps pulse per second signal generator；Second pulse generator is the standard clock signal source of timer and controller in the system, decoder exports the control signal of two groups of signal lamps, signal lamp work is driven Jing after drive circuit, controller is the major part of system, by the work of its control timer and decoder；The second pulse generator is connected with controller, timer；Controller is connected with decoder；Decoder is connected with signal lamp.

The theory diagram of traffic light control system is as shown in Figure 1.It is mainly made up of the part such as controller, timer, decoder and pps pulse per second signal generator.Second pulse generator is the standard clock signal source of timer and controller in the system, decoder exports the control signal of two groups of signal lamps, signal lamp work is driven Jing after drive circuit, controller is the major part of system, by the work of its control timer and decoder.

（1）Tu Jia tracks green light, second track when red.Represent that the vehicle on first track is allowed current, no through traffic in second track.When green light is spaced TL when specifying enough, controller sends status signal ST, goes to subsequent work state.

（2）First track amber light is bright, second track when red.Represent that the vehicle that stop line is not crossed on first track is closed to traffic, the vehicle that stop line is crossed continues current, and no through traffic in second track.During the bright sufficient specific time interval TY of amber light, controller sends state transition signals ST, goes to subsequent work state. （3）First track when red, second track amber light is bright.Represent that no through traffic in first track, when the vehicle on second track allows current green light foot predetermined time interval TL, controller sends state transition signals ST, goes to subsequent work state. （4）First track when red, second track amber light is bright.Represent that no through traffic in first track, the upper vehicle for crossing county's stop line in second track is closed to traffic, and the vehicle that stop line is crossed is closed to traffic, the vehicle that stop line is crossed continues current.During bright sufficient predetermined time interval TY of amber light, controller sends state transition signals ST, and system is transformed into again（1）Plant working condition. The more than traffic lights conversion of 4 kinds of working conditions is controlled by controller device.If four kinds of state encodings of controller are 00,01,11,10, and are represented with S0, S1, S3, S2 respectively, then as shown in table 12,1, controller should send the control signal of first, second track red, yellow, and green lamp to the working condition and function of controller.For simplicity, the code name of lamp and the drive signal of lamp are united two into one, and is specified below： Controller working condition and function. State of a control signal lamp state track running status S0（00） First is green, the red first lane of second, and no through traffic in second track S1（01） Methyl yellow, the jogging of second Hong Jia track, no through traffic in second track S3（11） Methyl red, no through traffic in ethyl green first track, first lane S2（10） Methyl red, no through traffic in lead ethyl xanthate first track, the jogging of first track AG=1：First track green light； BG=1：Second track green light； AY=1：First track amber light is bright； BY=1：Second track amber light is bright； AR=1：First track when red； BY=1：Second track when red； If the original state of controller is S0（S0 is represented with state box）, when being less than 25 seconds the duration of S0, TL=0（TL is represented with decision block）, holding S0 is constant for controller.Only when being equal to 25 seconds the duration of S0, TL=1, controller sends state transition signals ST（ST is represented with output with conditions frame）, and it is transformed into next working condition.The rest may be inferred can get a thorough understanding of the expressed implication of ASM figures. The design of element circuit： Timer by with system pulse per second (PPS)（There is provided by gate generator）The counter of synchronization is constituted, it is desirable to which counter resets first under status signal ST effects, and then under the effect of clock pulses rising edge, counter is started from scratch to carry out increasing 1 counting, and the timing signal TY of the mould 5 and timing signal TL of mould 25 is provided to controller. Counter is designed easier from integrated circuit 74LS163.74LS163 is 4 binary synchronous counters, and it has synchronous clearing, synchronously puts several functions.

Controller is the core of traffic administration, and it should be able to be according to the conversion of traffic administration rule control signal lamp working condition.

The main task of decoder is, by 4 kinds of working conditions of output Q1, Q0 of controller, to translate into the working condition of 6 signal lamps on first, second track.Relation between the state encoding and Signalized control signal of controller is as shown in table 12,4.The decoding circuit for realizing above-mentioned relation asks reader's designed, designed.

The foregoing description of the disclosed embodiments, enables professional and technical personnel in the field to realize or using the present invention.Various modifications to these embodiments will be apparent for those skilled in the art, and generic principles defined herein can be realized in other embodiments without departing from the spirit or scope of the present invention.Therefore, the present invention is not intended to be limited to the embodiments shown herein, and is to fit to the most wide scope consistent with principles disclosed herein and features of novelty.

Claims

1. a kind of novel traffic light control circuit, it is characterised in that：It is mainly made up of controller, timer, decoder and pps pulse per second signal generator；Second pulse generator is the standard clock signal source of timer and controller in the system, decoder exports the control signal of two groups of signal lamps, signal lamp work is driven Jing after drive circuit, controller is the major part of system, by the work of its control timer and decoder；The second pulse generator is connected with controller, timer；Controller is connected with decoder；Decoder is connected with signal lamp.