CN2459719Y - Portable intelligent traffic signal lamp controller - Google Patents

Abstract

The utility model relates to a portable control device of intelligent traffic signal lamps, which is a traffic control and management device. Ports of 'P10 to P17' of a single chip computer are connected with a drive unit of signal lamps; 'P00 to P07'ends are connected with 'DB0 to DB7' ends of an interface circuit; 'P20, P26, RD, WR, ALE, REST, NTO' ends which respectively and sequentially correspond are connected with 'AO, CS, RD, WR, CLK, REST, IRQ' ends of the interface circuit; 'RXD, TXD' ends are connected with serial wireless communication; 'OUTAO to A4, OUTBO to B4' of the interface circuit are connected with segments through driving, and 'SLO to 2' of the interface circuit are connected with code translation through driving. 'RLO to 2' ends of the interface circuit are connected with keyboards.

Description

Portable intelligent traffic signals lamp control device

The utility model relates to the technical field of traffic control and management.

Present traffic signals lamp control device is mainly used in the urban traffic control system, normally be fixed in the intersection, the working time of signal lamp and working method all are pre-set, can not change at any time according to actual conditions, thereby its applicable situation, scope are limited.

The purpose of this utility model is exactly according to road construction, keeps in repair, removes obstacles and the demand of other special location or traffic administration in particular cases, designs a kind of on-the-spot controllable type, double-direction radio communication, portable traffic signals lamp control device.

Portable intelligent traffic signals lamp control device of the present utility model is mainly by the signal lamp driver element, wireless series communication, section drives, decoding drives, keyboard, display device, single-chip microcomputer, interface circuit is formed, " P10～P17 " of single-chip microcomputer mouthful joins with the signal lamp driver element, " P00～P07 " end of single-chip microcomputer is connected with " DB0～DB7 " end of interface circuit, " the P20; P26; RD; WR; ALE; REST of single-chip microcomputer, NTO " the end corresponding " AO with interface circuit of order respectively, CS, RD, WR, CLK, REST, IRQ " hold and join; the " RXD of single-chip microcomputer, TXD " hold with wireless series communication and join; the " OUTAO～A4 of interface circuit, OUTBO～B4 " join with the section driving, " SLO～2 " of interface circuit drive with decoding and join." RLO～2 " termination keyboard of interface circuit, interface circuit drives 74LS541 by section and position driving 74LS365 removes to promote seven sections LED charactrons of 4 common cathodes.Wireless series communication is made of the JF820C/JF821C wireless data transmission component, two ends respectively have one group, serial communication is driven by MAX232, the serial port TXD/RXD of it and 89C51 links together, the serial delivery outlet of MAX232 is connected with RXD, the LE of JF820C, BUST pin, and TXD, RXD, LE, the IRQ pin of JF821C received in the serial input port of MAX232.

The utility model is the critical piece of forming this device by Chip Microcomputer A t89C51 and 8279 on the whole, and the working time of setting signal lamp and working method are finished programming by single-chip microcomputer as the case may be, the control signal lamp.Simultaneously can be wirelessly transmitted to another signal lamp control device, so that from the control traffic of road two ends by serial communication.

Advantage of the present utility model is: adopt the art of this patent, can revise immediately the working time of signal lamp, and there have multiple formula to make mode (as one-way trip, opposing traffic, anxious car current, forbidden etc.) to be available, inside programming is finished by microprocessor in parameter input back, and by wireless telecommunications total system is coordinated to move automatically then.Because this device adopted microprocessor unit, so the core control part stable performance, volume is little, cost is low, is easy to use, adds that peripheral auxiliary equipment such as physical construction, electric supply installation etc. can move, and can produce very high economic benefit and social benefit.

Fig. 1 is a circuit structure block diagram of the present utility model.Drive 3, decipher driving 4, keyboard 5, display device 6 comprising signal lamp driver element 1, wireless series communication 2, single-chip microcomputer U1, interface circuit U2, section.

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

Embodiment of the present utility model is as follows:

This device mainly is made up of signal lamp driver element 1, wireless series communication 2, single-chip microcomputer U1, interface circuit U2, section driving 3, decoding driving 4, keyboard 5, display device 6, be " AT89C51 " with single-chip microcomputer U1 and interface circuit U2 as the model of core component single-chip microcomputer U1 wherein, the model of interface circuit U2 is " 8279 ".Device utilizes the EPROM of the RAM of inner 256 bytes of AT89C51 and 4K byte as data and program code storage portions, and by U2 control button input and time showing.What provide among Fig. 1 is with a kind of interface mode of U2 as the data-carrier store of U1, with the decoding end of P20 as command word or status word and data word, P20 writes or sense command or status word during for high level, P20 writes or sense data during for low level, U2 removes to promote seven sections LED charactrons of 4 common cathodes by 74LS541 in the section driving 3 and 74LS365 and carries out time showing, not only can show the working time and the working method that reset, and in operational process each second show a numerical value, to show a certain signal lamp second number of excess time.Wireless telecommunications system is made of the JF820C/JF821C wireless data transmission component, and two ends respectively have one group, and serial communication is adopted in the input and output of its data, and data transmission bauds is 1200bps.Wireless series communication 2 is driven by MAX232, it and U289C51 serial port TXD/RXD link together, the serial delivery outlet of MAX232 is connected with RXD, the LE of JF820C, BUSY pin, and TXD, RXD, LE, the IRQ pin of JF821C received in the serial input port of MAX232.The concrete control of signal lamp is carried out with 74LS541 driving power amplifier by the P1 mouth of 89C51.

Device has designed 12 buttons, and reality has only been used 8 buttons, and all the other 4 buttons can be used as the function expansion and use.SL0 among Fig. 1～2 are sweep trace, link to each other with the alignment of keyboard matrix (only having used wherein four) through 3～8 code translators (74LS138), are used for keyboard scan and make the address decoding of four seven sections light-emitting diode displays; RL0～2 are the line of return.The function of 8 buttons is respectively: reset key (Reset) 1..Be used for determining whether to revise the traffic lights time and being used for system reset; 2. traffic lights options button (Red/Grn).When determining to revise, to select the type of lamp, button just can switch between traffic lights continuously; 3. minute and options button in second (Min/Sec).Determine the weight of input time.4. numerical digit options button (Shift).Continuously button just can from left to right be determined the time position that will revise, this moment this charactron demonstration with the form appearance of flicker, be convenient to discern.5. numerical value options button (Num).Button just can make numerical value from 0 to 9 circulation change continuously.6. abandon enter key (Abort).Abandon the content of current modification, use the original time of setting or the default value of system.7. acknowledgement key (Return).Be equivalent to enter key, make system, and the amended time of this locality is sent to the traffic controller of the other end by the mode of wireless serial communication, to guarantee the system synchronization operation by current amended value operation.8. the anxious car key (Alert) that passes through.As anxious car by or when being in an emergency, press this key after, A, B two ends all send out a warning.

The program design of device comprises five modules: main control module, signal lamp control module, display module, time processing module and keyboard processing module.

(1) main control module.After system powers on, at first carry out initialization to 8279, setting the keyboard working method is coded scanning keyboard, two key interlock mode, display is changed to 4 character left end mode of entrance, and to the programming of 8279 clocks, removes display random access memory, FIFO/RAM content; Then the RAM district of storing the signal lamp working time being carried out default value presets; Final system is pressed default value circular flow until keyboard interrupt.

(2) signal lamp control module.Regard a reverse order course of action as the course of action of A, B end signal lamp is approximate, as shown in Figure 6.This module can be used as the submodule that primary module calls.

(3) display module.Position flicker when being used for that the time that the red, green, yellow lamp of A, B two ends is connected carried out countdown demonstration and keyboard input shows, shows owing to adopt assembly language to carry out the decimal system, so contain conversion between binary code and the binary-coded decimal in this module.

(4) time processing module.1 second time delay module is arranged, subtract 1 second module and the time reloads the circulation module, and adopt regularly interrupt mode.

(5) keyboard processing module.For the very strong instrument of this a kind of real-time of traffic light controller, be fit to adopt interrupt mode.In case have no progeny in the discovery button, AB two ends signal lamp should be processed into red light phase usually, after the traffic lights working time of input obtains confirming, rerun by currency, do not recover original data and do not get back to program interrupt point.Owing to interrupt not returning, therefore must in RAM, open up some unit and indicate, with the situation of button before remembeing, make right judgement for primary control program, control is directed to correct direction.

Claims (2)

1. portable intelligent traffic signals lamp control device, import by button, time showing, signal lamp control, wireless serial communication four major parts are formed, " P10～P17 " mouth that it is characterized in that single-chip microcomputer (U1) joins with signal lamp driver element (1), " P00～P07 " end of single-chip microcomputer (U1) is connected with " DB0～DB7 " end of interface circuit (U2), " the P20; P26; RD; WR; ALE; REST of single-chip microcomputer (U1), NTO " the end corresponding " AO with interface circuit (U2) of order respectively, CS, RD, WR, CLK, REST, IRQ " hold and join; the " RXD of single-chip microcomputer (U1), TXD " hold with wireless series communication (2) and join; the " OUTAO～A4 of interface circuit (U2), OUTBO～B4 " join with section driving (3); " SLO～2 " of interface circuit (U2) drive (4) with decoding and join " RLO～2 " the termination keyboards (5) of interface circuit (U2).

2. portable intelligent traffic signals lamp control device according to claim 1, it is characterized in that wireless series communication (2) is made of the JF820C/JF821C wireless data transmission component, two ends respectively have one group, serial communication is driven by MAX232, the serial port TXD/RXD of it and 89C51 links together, the serial delivery outlet of MAX232 is connected with RXD, the LE of JF820C, BUST pin, and TXD, RXD, LE, the IRQ pin of JF821C received in the serial input port of MAX232.

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