CN203134134U

CN203134134U - Road traffic signal countdown display based on electric power carrier communication

Info

Publication number: CN203134134U
Application number: CN 201320081752
Authority: CN
Inventors: 聂涣涛
Original assignee: Individual
Current assignee: Individual
Priority date: 2013-02-22
Filing date: 2013-02-22
Publication date: 2013-08-14
Anticipated expiration: 2023-02-22

Abstract

The utility model discloses a road traffic signal countdown display based on electric power carrier communication. The road traffic signal countdown display based on electric power carrier communication includes a display module and a driving module. The driving module is provided with a display driving module, an electric power carrier module, a wiring terminal, a switch power and a single-chip microprocessor, wherein the display driving module, the electric power carrier module and the switch power source are all connected to the single-chip microprocessor directly; the display driving module is connected to the display module; and the electric power carrier module is connected to an external traffic signal controller through the wiring terminal. The road traffic signal countdown display based on electric power carrier communication adopts electric power carrier communication, so that a function of communication countdown is realized without adding communication cables. The construction cost is reduced, a requirement for real-time display is satisfied and the application range is enlarged.

Description

A kind of road traffic signal countdown display based on power carrier communication

Technical field

The utility model relates to a kind of signal countdown display that is used in the road traffic, realizes based on power carrier communication, belongs to the traffic displaying apparatus field.

Background technology

Along with the development of modern city, in order to realize the automatic management to traffic, in increasing urban construction, lay, install the road traffic signal device additional and become inevitable choice.Among this, because road traffic signal countdown display device is because the management and control that can effectively dredge the magnitude of traffic flow becomes one of the most frequently used road traffic signal device.

Existing road traffic signal countdown display mainly comprises study tracking mode count-down device and the formula count-down device of communicating by letter.Wherein, the learning type count-down device is by detecting the conduction time of each light color of traffic lights, showing later in stationary value of acquisition; The countdown of communication formula then is to obtain to show after the demonstration time by carrying out communication with traffic signal controlling machine.

The shortcoming of existing learning type countdown is can't be applied in the crossing of intelligent crossing and the multi-period clearance scheme of employing, because in this crossing, self-adaptation and concentrated coordination control meeting are optimized the crossing clearance time according to vehicle flowrate, because learning-oriented principle of work is the fixing clearance cycle of detection signal lamp, so the cycle that changes can cause countdown normally to show.That is to say study tracking mode count-down device owing to the restriction of principle of work, the show state that can not upgrade in time causes satisfying Based Intelligent Control and concentrates the control requirement of coordination crossing.

In order to address the above problem, common solution is to transform the learning type count-down device as communication-type to show count-down device in real time, that is to say and make the learning type count-down device from traffic controlling machine, obtain to show temporal information, in order to satisfy the requirement that communication-type shows countdown in real time, need set up a bars cable could work, this is difficult to realize in the modern urban construction very much, its reason is in the city system of having built up, increasing a such cable can give and built the project of finishing and bring and repeat construction, bring huge construction cost for the road of building well, this way does not possess operability.

The utility model content

Defective at prior art, the applicant provides a kind of road traffic signal countdown display based on power carrier communication in conjunction with the present situation of urban construction at present, merged the advantage of traditional study tracking mode count-down device with the formula count-down device of communicating by letter, on Project Realization, do not need to set up the cable of any specific function, can not increase road construction, thereby the required various expenses of intelligent control that realize have been significantly reduced, safety and allow traffic participant not have conflict, improve the crossing traffic capacity, especially satisfy Based Intelligent Control and concentrate the control requirement of coordination crossing.

For achieving the above object, the utility model is achieved through the following technical solutions:

A kind of road traffic signal countdown display based on power carrier communication, comprise display module, driver module, have driver module, power carrier module, connection terminal, Switching Power Supply, single-chip microcomputer on the driver module, wherein driver module, power carrier module, Switching Power Supply all are directly connected to single-chip microcomputer, driver module is connected to display module, and the power carrier module is connected to outside traffic signal controlling machine by connection terminal.

Above-mentioned road traffic signal countdown display, install the power carrier module additional at traditional learning type count-down device, thereby can be by means of the data communication of the line of electric force realization that in the city, spreads all over traffic signal controlling machine, do not increasing road construction, do not increase under the prerequisite of client cables and realized transforming traditional learning type count-down device as the communication-type count-down device, because whole transformation can realize based on the improvement to count-down device self fully, do not need engineering projects such as road construction are made amendment, thereby significantly reduced the engineering difficulty, be convenient to large-scale promotion and use.

Wherein, in order to control the volume of product, described driver module, display module are positioned at same housing.

In the utility model, the number of each concrete module is not to be subjected to special the restriction, and preferred, in order to reduce production costs, each module is one.

In the utility model, used the concept of single-chip microcomputer, power carrier module, these two kinds of electronic components be by those skilled in the art widely used, single-chip microcomputer is used for realizing information processing and control function, preferred used single-chip microcomputer is 89C51 in the present invention, 89C51 is a kind of efficient microcontroller of ATMEL, for embedded control system provides dirigibility high and inexpensive scheme, and industrial good reliability; The power carrier module is used for realizing the line of electric force data communication, be called power line modem on the engineering again, adopt the data transmit-receive of RXD, the TXD realization single-chip microcomputer on TTL and the single-chip microcomputer, and realize data transmission with traffic signal controlling machine by the power carrier mode, existing power carrier module all can be used for the utility model, for example power carrier chip ST7538, BWP08 power carrier module, DrF-2203 power carrier module etc.

In the utility model, driver module refers to drive and manage the device of display module work, normally shows the display driver chip that the field is used.At different display module types, corresponding display driver chip is adopted in for example liquid crystal display, LED array of display etc. respectively, and this is known to the display device field.

In the utility model, described connection terminal is also connected to the external power source power taking, and the Switching Power Supply that is connected with connection terminal is supplied with single-chip microcomputer after the 220V alternating current of external power source is converted to the 5V direct current.

On concrete product is realized, usually connection terminal is from the power supply source of signal lamp power taking as whole countdown display, the 220V alternating current of its acquisition converts the 220V alternating current to supply system works 5V direct supply by Switching Power Supply, thereby satisfies the need of work of single-chip microcomputer.

By above-mentioned driver module, single-chip microcomputer is in charge of the function management of each module and is responsible for showing data with long-range traffic signal controlling machine interactive signal; Driver module then is responsible for making display module show that corresponding countdown shows signal according to the instruction of single-chip microcomputer.

Further, detection module is installed also on the driver module, detection module is connected with connection terminal, and is connected with the single-chip microcomputer both-way communication.This detection module is to be connected to outside signal lamp detection signal lamp reddish yellow green light look to be in which status detection circuit.

In the utility model, used display module is the device that shows the countdown data, it can be any available demonstration product, display panels etc. for example, preferably, consider composite demands such as glow color number, life of product, application cost, described display module is the light emitting diode module that dot matrix shows, can show multiple simple colors such as red, yellow, green and blue, and show arabic numeral with dot matrix way.

Improve based on said structure, countdown display of the present utility model has been achieved learning type function and communication-type function, and wherein the principle of learning type function is for using detection module detection signal light color state and various state continuance durations being carried out record.Begin if the state continuance duration in continuous several cycles is identical to begin to show from the maximum duration of each state, and be that unit successively decreases with the second that per second refreshes once and shows.The principle of communication formula function is that traffic signal controlling machine carries out communication by the RS485 interface or by power carrier module and count-down device, communication can be carried out once by per second, also can carry out when the signal lamp state is changed, count-down device goes out corresponding show state and content with the Context resolution of communication frames and shows.

By above-mentioned improvement, road traffic signal countdown display of the present utility model can be under the situation that does not increase communication cable, use cable and the traffic signal controlling machine of power carrier module by being connected to outside traffic signal controlling machine to carry out communication and show in real time, and realized the function of communication-type countdown and learning type countdown, can and concentrate coordination control crossing well to mate with self-adaptation, improve the scope of application of count-down device, reduce construction cost, and can not have a negative impact to count-down device, cost is lower.

Description of drawings

Fig. 1 is that the utility model is based on the circuit diagram of the road traffic signal countdown display of power carrier communication.

Embodiment

With reference to the accompanying drawings 1, shown a kind of specific implementation of the utility model based on the road traffic signal countdown display of power carrier communication, wherein have single-chip microcomputer 89C51 on the used driver module, thereby single-chip microcomputer is connected to display module control by driver module and drives the demonstration of display module; The electric power supply of driver module realizes by Switching Power Supply, and connection terminal is connected to outside signal lamp (not shown) and obtains to be converted to the 5V direct current by Switching Power Supply behind the 220V alternating current and provide stable operating voltage for 89C51; Single-chip microcomputer 89C51 is connected to traffic signal controlling machine by the power carrier module, thereby receives the traffic signals countdown data of traffic signal controlling machine transmission, realizes communication-type control; Also be connected with detection module on the single-chip microcomputer 89C51, this detection module obtains electric power supply from connection terminal, and is connected to outside signal lamp (not shown) detection signal light color status data and transfers data to single-chip microcomputer 89C51.Single-chip microcomputer 89C51 realizes learning type, communication-type function respectively by the data of reception detection module and the data of traffic signal controlling machine.

Above-mentioned shown structure only is a kind of more excellent realization of the present utility model; those skilled in the art change it; for example each several part is made on the different circuit boards, position change etc.; be the utility model and contain, protection domain of the present utility model only limits to the equivalents of claim and claim.

Claims

1. road traffic signal countdown display based on power carrier communication, it is characterized in that comprising display module, driver module, have driver module, power carrier module, connection terminal, Switching Power Supply, single-chip microcomputer on the driver module, wherein driver module, power carrier module, Switching Power Supply all are directly connected to single-chip microcomputer, driver module is connected to display module, and the power carrier module is connected to outside traffic signal controlling machine by connection terminal.

2. road traffic signal countdown display according to claim 1, it is characterized in that described connection terminal is also connected to the external power source power taking, the Switching Power Supply that is connected with connection terminal is supplied with single-chip microcomputer after the 220V alternating current of external power source is converted to the 5V direct current.

3. road traffic signal countdown display according to claim 1 is characterized in that detection module also is installed on the driver module, and detection module is connected with connection terminal, and is connected with the single-chip microcomputer both-way communication.

4. road traffic signal countdown display according to claim 1 is characterized in that described display module is the light emitting diode module that dot matrix shows.

5. road traffic signal countdown display according to claim 1 is characterized in that described display module, and driver module is installed in the same housing.