CN202210355U

CN202210355U - Road LED display intelligent countdown device

Info

Publication number: CN202210355U
Application number: CN201120346016XU
Authority: CN
Inventors: 吴桂丰
Original assignee: LINRUN INDUSTRY Co Ltd
Current assignee: LINRUN INDUSTRY Co Ltd
Priority date: 2011-09-15
Filing date: 2011-09-15
Publication date: 2012-05-02
Anticipated expiration: 2021-09-15

Abstract

A road LED display intelligent countdown device is provided to solve technical defects that the prior traffic light changing and waiting time countdown device is weak in stability, and a countdown time can not be normally displayed under a control mode of coordinating or automatically responding a traffic flow. The device comprises a traffic light perception circuit for connecting a traffic light signal line and responding the traffic light display state, an LED lattice for displaying countdown figures, and a one-chip microcomputer for controlling light colors of the LED lattice according to light colors of the traffic light responded by the traffic light perception circuit. The device is characterized in that the device also comprises a serial communication module for connecting the one-chip microcomputer with a traffic signal controller in a communication way, and obtaining a countdown time of a next traffic light period LED lattice. The countdown display is accurately carried out when signals sent by the signal controller are received by the countdown device, and the situation that the countdown device can not be normally displayed when period is changed and coordination control is carried out can be avoided. The learning type countdown function is compatible, when the countdown device and the signal controller are in communication faults and the signal controller is not provided with the communication capability, the traffic light time can still be learnt to realize countdown display.

Description

A kind of road LED shows intelligent countdown device

Technical field

The utility model relates to road traffic lamp control technology field, is specifically related to be used to show that traffic lights change the countdown device of stand-by period.

Background technology

It is through the time span of the traffic light signal of one-period in study of countdown device independently that existing traffic lights change the implementation method of waiting for duration; Estimate the traffic lights time in next cycle, change the signal lamp time that the starting point countdown shows current residual from the signal lamp light color.It is the implementation that is independent of signal controlling machine that existing countdown device is realized because of what adopt, therefore has the following shortcoming:

1, be independent of the learning-oriented countdown device of signal controlling machine, the traffic lights time of study time is the time in last cycle, behind variable period, produces mistake easily.

2, coordinate or respond to automatically under the traffic flow control model when the traffic signal controlling machine at crossing is operated in, existing countdown device can't normally show the excess time of current traffic lights.

Summary of the invention

In sum; The purpose of the utility model is to solve existing traffic lights variation and waits for that there is poor stability in the countdown device of duration; Coordinating or responding to the technological deficiency that can't show normally under the traffic flow control model that countdown is long automatically, and a kind of road LED that proposes shows intelligent countdown device.

For solving the technical matters that the utility model proposed; The technical scheme that adopts is: a kind of road LED shows intelligent countdown device; Include the traffic lights perception circuit that is used to connect traffic light signal line induction traffic lights show state, be used to show the LED dot matrix of countdown numeral and the light color of the traffic lights that arrive according to traffic lights perception circuit inductance changes the single-chip microcomputer of the light color of controlling the LED dot matrix; It is characterized in that also including: be used to set up single-chip microcomputer and carry out communication with traffic signal controlling machine and be connected, obtain the long serial communication module of countdown of next traffic lights period L ED dot matrix.

As the technical scheme of the utility model being made further improved technical scheme be:

Described serial communication module is 485 communication modules.

When said serial communication module was in proper working order, the duration that the LED dot matrix shows was controlled from the long signal of countdown that traffic signal controlling machine gets access to according to the serial communication module by single-chip microcomputer; When said serial communication module operational failure, the duration that the LED dot matrix shows is learnt the traffic lights time by single-chip microcomputer according to traffic lights perception circuit and is carried out countdown and obtain.

Described single-chip microcomputer model is: 89C51.

The beneficial effect of the utility model is: the independently countdown display device of serial communication module general script that the utility model increases has realized the networking control mode with signal controlling machine; The countdown display device is linked in the traffic signal control system; Become intelligent countdown display device, the function of compatible traditional countdown simultaneously.The demonstration of countdown is accurately carried out in the order that receives the signal controlling machine transmission in countdown, and countdown can not normally show when having avoided variable period and having coordinated control.Compatible learning-oriented countdown function breaks down or signal controlling machine does not possess under the situation of ability to communicate when countdown device and signal controlling machine communication, still can learn the traffic lights time and carry out the countdown demonstration.

Description of drawings

Fig. 1 is the block diagram of the utility model;

Fig. 2 is the circuit theory diagrams of the utility model;

Fig. 3 is the workflow diagram of the utility model.

Embodiment

Below in conjunction with accompanying drawing and preferred specific embodiment the structure of the utility model is done explanation further:

Shown in seeing figures.1.and.2, the utility model includes: traffic lights perception circuit 1, single-chip microcomputer U5, serial communication module 2 and LED dot matrix.

Traffic lights perception circuit 1 is connected with the traffic light signal line through interface J1, is used to respond to the traffic lights show state, and the foundation of traffic lights perception circuit 1 induction traffic light signal show state is a traffic lights lamp line voltage input state.

Single-chip microcomputer U5 connects the LED dot matrix through interface J8; Be used for the induction traffic lights show state signal that provides according to traffic lights perception circuit 1; The light color of perception traffic lights changes, and breaks down or signal controlling machine does not possess under the situation of ability to communicate in communication, and light color and cycle through traffic lights perception circuit 1 perception traffic lights change; Study draws the LED dot matrix and shows duration; Thereby control the duration of the demonstration of LED dot matrix, that is to say the cycle duration of the light color variation that draws traffic lights, guarantee that the LED dot matrix shows that the light color period of change duration of duration and traffic lights is consistent.This single-chip microcomputer model is: 89C51.

Serial communication module 2 is 485 communication modules; 485 communication modules adopt is that model is that the single-chip microcomputer U7 of MAX3080 is as 485 communication chips; Be used to set up single-chip microcomputer and carry out communication with traffic signal controlling machine and be connected, the LED dot matrix countdown of from traffic signal controlling machine, obtaining the next traffic lights cycle is long.

The LED dot matrix is fixedly mounted on the side of traffic lights, shows with LED electronics countdown numeral and waits for that traffic lights change duration, and the light color of LED electronics word and the light color of corresponding traffic lights change synchronously.

Principle of work:

When serial communication module 2 in proper working order; Single-chip microcomputer U5 and traffic signal controlling machine are under the mode of operation of 485 communications; Single-chip microcomputer U5 resolves by agreement the instruction that traffic signal controlling machine sends over; Parse traffic lights light color next time and change the time span that back LED dot matrix needs countdown to show, the light color control of LED dot matrix be by single-chip microcomputer according to traffic lights perception circuit inductance to the traffic lights light color and synchro control that is to say that the light color of LED dot matrix is identical with current traffic lights light color.In the moment that single-chip microcomputer U5 perception light color change to arrive, begin by the time span in the agreement down countdown show corresponding light color and duration.

After serial communication module 2 is out of order inefficacy; Or after the communicating interrupt between single-chip microcomputer U5 and traffic signal controlling machine; Single-chip microcomputer U5 then carries out learning-oriented pattern, and to draw the LED dot matrix long in the back countdown that changes of the light color of traffic lights; That is to say that single-chip microcomputer U5 carries out the calculating of time span to the variation of traffic lights light color signal; When the time span of red light, green light, amber light in two cycles is all coincide, that is to say that in corresponding time span of initial moment in next traffic lights cycle changing study through light color in to preceding two cycles draws respective length, shows the signal lamp countdown time of respective color in the LED dot matrix.

Claims

1. a road LED shows intelligent countdown device; Include the traffic lights perception circuit that is used to connect traffic light signal line induction traffic lights show state, be used to show the LED dot matrix of countdown numeral and the light color of the traffic lights that arrive according to traffic lights perception circuit inductance changes the single-chip microcomputer of the light color of controlling the LED dot matrix; It is characterized in that also including: be used to set up single-chip microcomputer and carry out communication with traffic signal controlling machine and be connected, obtain the long serial communication module of countdown of next traffic lights period L ED dot matrix.

2. a kind of road LED according to claim 1 shows intelligent countdown device, it is characterized in that: described serial communication module is 485 communication modules.

3. a kind of road LED according to claim 1 shows intelligent countdown device; It is characterized in that: when said serial communication module was in proper working order, the duration that the LED dot matrix shows was controlled from the long signal of countdown that traffic signal controlling machine gets access to according to the serial communication module by single-chip microcomputer; When said serial communication module operational failure, the duration that the LED dot matrix shows is learnt the traffic lights time by single-chip microcomputer according to traffic lights perception circuit and is carried out countdown and obtain.

4. a kind of road LED according to claim 1 shows intelligent countdown device, it is characterized in that: described single-chip microcomputer model is: 89C51.