CN104346941A - Communication learning type countdown timer - Google Patents
Communication learning type countdown timer Download PDFInfo
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- CN104346941A CN104346941A CN201410644492.8A CN201410644492A CN104346941A CN 104346941 A CN104346941 A CN 104346941A CN 201410644492 A CN201410644492 A CN 201410644492A CN 104346941 A CN104346941 A CN 104346941A
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- circuit module
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- microprocessor
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- G—PHYSICS
- G08—SIGNALLING
- G08G—TRAFFIC CONTROL SYSTEMS
- G08G1/00—Traffic control systems for road vehicles
- G08G1/09—Arrangements for giving variable traffic instructions
- G08G1/096—Arrangements for giving variable traffic instructions provided with indicators in which a mark progresses showing the time elapsed, e.g. of green phase
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- General Physics & Mathematics (AREA)
- Control Of El Displays (AREA)
- Control Of Indicators Other Than Cathode Ray Tubes (AREA)
Abstract
The invention discloses a communication learning type countdown timer, which is characterized by comprising a microprocessor, wherein the microprocessor is respectively connected to a constant current drive circuit module, an outer signal detection circuit and real-time display circuit module, a communication circuit module and a fault detection circuit module through signals, wherein the outer signal detection circuit and real-time display circuit module is also connected to an outer signal lightning protection circuit module. The countdown timer of the structure has the following advantages that 1) lightning protection design is added into the input end of each way of alternating current signal, so that each later circuit is protected to the greatest extent; 2) the input end is connected to a cement resistor in parallel, the output end of an optical coupler of the detection circuit is connected to a capacitor in parallel, so that a rectangular waveform input to the microprocessor is more ideal; 3) design of detecting a fault of a control panel is added, so that the efficiency for judgment and maintenance of the fault of the control panel is greatly improved; 4) an led field on a countdown timer panel is controlled by an anode and a cathode synchronously, so that the number and the wiring manner of wires from the control panel to a display panel are greatly simplified; 5) a learning function and a communication function are synchronously provided, and automatic quick transformation between learning and communication can be achieved.
Description
Technical field
The present invention relates to a kind of road traffic signal count-down device, especially the multi-period work of traffic signaling equipment can either be adapted to, its variable period work can be adapted to again, can also the fault of Automatic Detection and Control plate, and the count-down device of LED field on timer face can be outputted to.
Background technology
At present, in the urban road crossing that vehicle flowrate is larger, often use cooperative type teleseme to change phasing scheme in real time by traffic flow detector, cause phase step always to change, learning-oriented count-down device now is just difficult to work together, and needs to use communication type count-down device.But, what communication type count-down device neither be optimum.Because at some time (such as, communication module meets with thunderbolt, and external interference signal density is large, and communication cable breaks etc.), communication count-down device just cannot work together.Further, generally detecting countdown control panel quality needs connection LED field to observe out, keeps in repair countdown control panel like this and extremely bothers.And at home, the count-down device of a lot of producer is many to the assembly line of panel field from control panel, and assembling mode is also very loaded down with trivial details.
Summary of the invention
The object of the invention is to overcome the existing limitation of count-down device condition of work and the defect of reliability, provide one to have learning functionality, also have communication function, and there is the communication learning type count-down device of the ability of Automatic Detection and Control plate fault.
The technical solution used in the present invention is: communication learning type count-down device, it is characterized in that comprising microprocessor, described microprocessor is connected with constant-current drive circuit module, external signal testing circuit and real-time display circuit module, communication circuit module and failure detector circuit module by signal respectively, and described external signal detection module and in real time display circuit module also connect external signal lightning protection circuit module; External signal by after external signal lightning protection circuit module through external signal testing circuit and display circuit module process in real time, export square wave to microprocessor processes, the effective communication signal received is transferred to microprocessor by communication circuit module after conversion; Microprocessor drives the light emitting diode of external signal testing circuit and real-time display circuit module to make it light on the one hand, the time of Gather and input signal on the other hand; Described external signal testing circuit and in real time display circuit module are made up of laser-emitting diode D1, cement resistor, current-limiting resistance, optocoupler, filter capacitor and light emitting diode, the filter capacitor that described laser-emitting diode D1 cement resistor in parallel is contrary with both direction; The filter capacitor that described both direction is contrary is connected JP switch respectively, and described cement resistor is connected with the optocoupler be in parallel and filter capacitor, and described optocoupler is connected with electric capacity with the cement resistor be in parallel; Described communication circuit module is mainly made up of max485 chip and toggle switch, when receiving effective communication signal, giving microprocessor and processing after the conversion of max485 chip; Described failure detector circuit module comprises two common anode pole charactrons, led pilot lamp and PNP triode; Described constant-current drive circuit module comprises 74HC245 chip, ULN2003A chip, field effect transistor and NPN triode.
As a further improvement on the present invention, described thunder-lightning module is made up of some lightning protection circuits, described lightning protection circuit comprises voltage dependent resistor (VDR) and gas-discharge tube, connects after a described gas-discharge tube voltage dependent resistor (VDR) in parallel with another voltage dependent resistor (VDR), described gas-discharge tube ground connection; Describedly be connected external signal testing circuit and real-time display circuit module with the voltage dependent resistor (VDR) of gas-discharge tube parallel connection.
As a further improvement on the present invention, after the complete input signal of microprocessor processes, export and need the digital signal of display to give 74HC245 latch, then useful low and high level signal is exported to ULN2003A Darlington transistor, thus control the negative electrode of countdown LED field.
Further improve as of the present invention, the anode series limiting resistor of LED light also receives the output terminal of field effect transistor, the direct ground connection of negative electrode.
Further improve as of the present invention, the anode of the charactron of described failure detector circuit module is driven by PNP triode, by the closed of Microprocessor S3C44B0X triode and shutoff, the negative electrode of described charactron is directly connected one to one with the output of ULN2003A by series limiting resistor.
The beneficial effect that the present invention adopts is: the count-down device of this structure just has following advantage: 1) input end of each road AC signal all adds lightning Protection Design, protect each several part circuit below to greatest extent: 2) input end is in parallel cement resistor, at the optocoupler output terminal shunt-wound capacitance of testing circuit, the square waveform inputing to microprocessor can be made more desirable: 3) add detection control plate accident design, which greatly enhances the efficiency of control panel breakdown judge and maintenance: 4) on count-down device panel, simultaneously the mode of led field adopts anode and negative electrode to control, enormously simplify quantity and the mode of connection of wiring on from control panel to display panel, 5) possessed learning functionality and communication function simultaneously, and can realize learning the automatic fast transition between communication.
Accompanying drawing explanation
Fig. 1 is schematic diagram of the present invention.
Fig. 2 is schematic diagram of the present invention.
Fig. 3 is external signal lightning protection circuit module circuit diagram.
Fig. 4 is external signal testing circuit and real-time display circuit module circuit diagram.
Fig. 5 is microprocessor and power module circuitry figure.
Fig. 6 is communication circuit module circuit diagram.
Fig. 7 is constant-current drive circuit module circuit diagram.
Fig. 8 is failure detector circuit module circuit diagram.
Embodiment
Below in conjunction with Fig. 1 to Fig. 8, the present invention is described further.
As shown in the figure, communication learning type count-down device, it is characterized in that comprising microprocessor, described microprocessor is connected with constant-current drive circuit module, external signal testing circuit and real-time display circuit module, communication circuit module and failure detector circuit module by signal respectively, and described external signal detection module and in real time display circuit module also connect external signal lightning protection circuit module; External signal by after external signal lightning protection circuit module through external signal testing circuit and display circuit module process in real time, export square wave to microprocessor processes, the effective communication signal received is transferred to microprocessor by communication circuit module after conversion; Microprocessor drives the light emitting diode of external signal testing circuit and real-time display circuit module to make it light on the one hand, the time of Gather and input signal on the other hand; Described external signal testing circuit and in real time display circuit module are made up of laser-emitting diode D1, cement resistor, current-limiting resistance, optocoupler, filter capacitor and light emitting diode, the filter capacitor that described laser-emitting diode D1 cement resistor in parallel is contrary with both direction; The filter capacitor that described both direction is contrary is connected JP switch respectively, and described cement resistor is connected with the optocoupler be in parallel and filter capacitor, and described optocoupler is connected with electric capacity with the cement resistor be in parallel; Described communication circuit module is mainly made up of max485 chip and toggle switch, when receiving effective communication signal, giving microprocessor and processing after the conversion of max485 chip; Described failure detector circuit module comprises two common anode pole charactrons, led pilot lamp and PNP triode; Described constant-current drive circuit module comprises 74HC245 chip, ULN2003A chip, field effect transistor and NPN triode.
External signal lightning protection circuit module is primarily of voltage dependent resistor (VDR) and gas-discharge tube composition.When the AC signal voltage of outside input becomes large suddenly, effectively overvoltage can be imported the earth by the voltage dependent resistor (VDR) of lightning protection circuit and the circuit of gas-discharge tube composition, thus protect circuit below.External signal testing circuit and in real time display circuit module are mainly made up of cement resistor, current-limiting resistance, optocoupler, filter capacitor and light emitting diode.AC signal when outside have passed lightning protection circuit smoothly, enter optocoupler through current-limiting resistance and export DC level, then by after filter capacitor filtering, export ideal square wave to microprocessor processes, after microprocessor detects input signal, drive this road light emitting diode to make it light on the one hand, gather the time of this road input signal on the other hand.Communication circuit module mainly by max485 chip, toggle switch, max485 chip peripheral circuit composition.When receiving effective communication signal, after the conversion of max485 chip, giving microprocessor process.Constant-current drive circuit module is mainly made up of 74HC245 chip, ULN2003A chip, field effect transistor and NPN triode.After the complete input signal of microprocessor processes, export and need the digital signal of display to give 74HC245 latch, then useful low and high level signal is exported to ULN2003A Darlington transistor, thus control the negative electrode of countdown led field; In addition, after the complete input signal of microprocessor processes, show that the color signal of required display field gives triode, drive field effect transistor to reach the object of control field color by triode.Failure detector circuit module is mainly by two common anode pole charactrons, led pilot lamp (red, yellow, and green), and PNP triode forms.The anode of charactron mainly PNP triode drives, and then controls the closed of triode by microprocessor and turn off.The negative electrode of charactron is directly connected one to one with the output of ULN2003A by series limiting resistor.The numeral shown by led field on such countdown panel just can by this double figures code pipe simultaneous display out, reach the object of detection control plate quality, or actually other faults of fault of control panel just can be distinguished very easily, improve detection efficiency greatly.Further, on panel numeral color by led pilot lamp anode series limiting resistor and receive the output terminal of field effect transistor and the direct ground connection of negative electrode simulates out.
Principle of work of the present invention is: first, if after the communication circuit module of count-down device detects correct communication signal, again through the process of microprocessor, information is exported to constant-current driven module and fault detection module simultaneously, if the charactron now in fault detection module and LED light display are correctly, then illustrate that this count-down device is working properly under communication mode; Secondly, when communication is broken down or teleseme does not have communication signal to send, microprocessor, after confirmation Communications failure, is switched to mode of learning immediately.The left-hand rotation lamp line inputted by INPUT interface and craspedodrome lamp line, after lightning-protection module, are entered into external signal testing circuit module transitions and become digital signal level, then deliver to microprocessor and process.Microprocessor is while feed back real-time for external signal by LED light, while collect the displaying time of each road signal lamp in one-period, then successively the information after process is passed to constant current in order simultaneously and drive display module and fault detection module.If the charactron in fault detection module and LED light display are correctly, then illustrate that this count-down device is working properly under mode of learning.
Count-down device provided by the invention, it both had learning functionality, also had communication function, and had the ability of Automatic Detection and Control plate fault.Having in effective communication signal situation, count-down device is operated in communication mode, if communicating interrupt, count-down device transfers mode of learning to automatically.When count-down device is operated in mode of learning, if receive one group of effective communication data, then count-down device transfers communication mode to immediately.And, when count-down device breaks down, failure cause can be found very easily by failure detector circuit.Like this, improving practicality and the reliability of count-down device control panel while, its maintenance efficiency also substantially increases.Finally, the control circuit of this count-down device improves in field display translation mode, controls anode and the negative electrode of led field on display panel simultaneously, enormously simplify quantity and the mode of connection of wiring on from control panel to display panel.
The count-down device of this structure just has following advantage: 1) input end of each road AC signal all adds lightning Protection Design, protect each several part circuit below to greatest extent: 2) input end is in parallel cement resistor, at the optocoupler output terminal shunt-wound capacitance of testing circuit, the square waveform inputing to microprocessor can be made more desirable: 3) add detection control plate accident design, which greatly enhances the efficiency of control panel breakdown judge and maintenance: 4) on count-down device panel, simultaneously the mode of led field adopts anode and negative electrode to control, enormously simplify quantity and the mode of connection of wiring on from control panel to display panel, 5) possessed learning functionality and communication function simultaneously, and can realize learning the automatic fast transition between communication.
Those skilled in the art should know; protection scheme of the present invention is not limited only to the above embodiments; various permutation and combination and conversion can also be carried out on the basis of above-described embodiment; under the prerequisite without prejudice to spirit of the present invention, the various conversion that the present invention carries out all are dropped in protection scope of the present invention.
Claims (5)
1. communication learning type count-down device, it is characterized in that comprising microprocessor, described microprocessor is connected with constant-current drive circuit module, external signal testing circuit and real-time display circuit module, communication circuit module and failure detector circuit module by signal respectively, and described external signal detection module and in real time display circuit module also connect external signal lightning protection circuit module; External signal by after external signal lightning protection circuit module through external signal testing circuit and display circuit module process in real time, export square wave to microprocessor processes, the effective communication signal received is transferred to microprocessor by communication circuit module after conversion; Microprocessor drives the light emitting diode of external signal testing circuit and real-time display circuit module to make it light on the one hand, the time of Gather and input signal on the other hand; Described external signal testing circuit and in real time display circuit module are made up of laser-emitting diode D1, cement resistor, current-limiting resistance, optocoupler, filter capacitor and light emitting diode, the filter capacitor that described laser-emitting diode D1 cement resistor in parallel is contrary with both direction; The filter capacitor that described both direction is contrary is connected JP switch respectively, and described cement resistor is connected with the optocoupler be in parallel and filter capacitor, and described optocoupler is connected with electric capacity with the cement resistor be in parallel; Described communication circuit module is mainly made up of max485 chip and toggle switch, when receiving effective communication signal, giving microprocessor and processing after the conversion of max485 chip; Described failure detector circuit module comprises two common anode pole charactrons, led pilot lamp and PNP triode; Described constant-current drive circuit module comprises 74HC245 chip, ULN2003A chip, field effect transistor and NPN triode.
2. communication learning type count-down device according to claim 1, it is characterized in that described thunder-lightning module is made up of some lightning protection circuits, described lightning protection circuit comprises voltage dependent resistor (VDR) and gas-discharge tube, connect with another voltage dependent resistor (VDR) after a described gas-discharge tube voltage dependent resistor (VDR) in parallel, described gas-discharge tube ground connection; Describedly be connected external signal testing circuit and real-time display circuit module with the voltage dependent resistor (VDR) of gas-discharge tube parallel connection.
3. communication learning type count-down device according to claim 1, after it is characterized in that the complete input signal of microprocessor processes, export and need the digital signal of display to give 74HC245 latch, then useful low and high level signal is exported to ULN2003A Darlington transistor, thus control the negative electrode of countdown LED field.
4. communication learning type count-down device according to claim 3, is characterized in that the anode series limiting resistor of LED light and receives the output terminal of field effect transistor, the direct ground connection of negative electrode.
5. communication learning type count-down device as claimed in any of claims 1 to 4, it is characterized in that the anode of the charactron of described failure detector circuit module is driven by PNP triode, by the closed of Microprocessor S3C44B0X triode and shutoff, the negative electrode of described charactron is directly connected one to one with the output of ULN2003A by series limiting resistor.
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| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201410644492.8A CN104346941B (en) | 2014-11-14 | 2014-11-14 | Communicate learning type count-down device |
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| Application Number | Priority Date | Filing Date | Title |
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| CN201410644492.8A CN104346941B (en) | 2014-11-14 | 2014-11-14 | Communicate learning type count-down device |
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| CN104346941A true CN104346941A (en) | 2015-02-11 |
| CN104346941B CN104346941B (en) | 2017-09-08 |
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Citations (5)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| WO2003009252A1 (en) * | 2001-07-16 | 2003-01-30 | On Elektronik San. Ve Tic. Ltd. Sti. | Traffic light displaying remaining time |
| CN201142143Y (en) * | 2007-12-28 | 2008-10-29 | 鞍钢集团自动化公司 | LED traffic countdown display controller |
| CN201918021U (en) * | 2010-10-13 | 2011-08-03 | 金跃利 | Traffic light control system |
| CN102938212A (en) * | 2012-11-08 | 2013-02-20 | 江苏大为科技股份有限公司 | Communication type road traffic signal countdown display |
| CN203849872U (en) * | 2014-03-11 | 2014-09-24 | 深圳榕亨实业集团有限公司 | Novel control circuit of road LED display intelligent countdown device |
-
2014
- 2014-11-14 CN CN201410644492.8A patent/CN104346941B/en active Active
Patent Citations (5)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| WO2003009252A1 (en) * | 2001-07-16 | 2003-01-30 | On Elektronik San. Ve Tic. Ltd. Sti. | Traffic light displaying remaining time |
| CN201142143Y (en) * | 2007-12-28 | 2008-10-29 | 鞍钢集团自动化公司 | LED traffic countdown display controller |
| CN201918021U (en) * | 2010-10-13 | 2011-08-03 | 金跃利 | Traffic light control system |
| CN102938212A (en) * | 2012-11-08 | 2013-02-20 | 江苏大为科技股份有限公司 | Communication type road traffic signal countdown display |
| CN203849872U (en) * | 2014-03-11 | 2014-09-24 | 深圳榕亨实业集团有限公司 | Novel control circuit of road LED display intelligent countdown device |
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| CN104346941B (en) | 2017-09-08 |
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