CN104346941B - Communicate learning type count-down device - Google Patents
Communicate learning type count-down device Download PDFInfo
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- CN104346941B CN104346941B CN201410644492.8A CN201410644492A CN104346941B CN 104346941 B CN104346941 B CN 104346941B CN 201410644492 A CN201410644492 A CN 201410644492A CN 104346941 B CN104346941 B CN 104346941B
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- circuit module
- communication
- external signal
- microprocessor
- down device
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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 communication learning type count-down device, it is characterized in that including microprocessor, the microprocessor is connected with constant-current drive circuit module, external signal detection circuit and real-time display circuit module, communication circuit module and failure detector circuit module by signal respectively, and the external signal detection module and real-time display circuit module are also connected with external signal lightning protection circuit module.The count-down device of this structure just has the advantage that：1）Lightning Protection Design is all added per the input of AC signal all the way, each several part circuit below is protected to greatest extent：2）Input cement resistor in parallel, in the optocoupler output shunt-wound capacitance of detection circuit, can make the square waveform for inputing to microprocessor more preferable：3）Detection control panel accident design is added, which greatly enhances control panel breakdown judge and the efficiency of maintenance：4）The mode of led fields is controlled simultaneously using anode and negative electrode on count-down device panel, enormously simplify the quantity and the mode of connection of wiring on from control panel to display panel；5）Learning functionality and communication function have been provided simultaneously with, and the automatic fast transition between study and communication can be realized.
Description
Technical field
The present invention relates to a kind of road traffic signal count-down device, the multi-period work of traffic signaling equipment can either be especially adapted to
Make, the work of its variable period is adapted to again, moreover it is possible to the fault of Automatic Detection and Control plate, and can be output on timer face
The count-down device of LED fields.
Background technology
At present, often vehicle Flow Detection is passed through using cooperative type semaphore than larger urban road crossing in vehicle flowrate
Device carries out change phasing scheme in real time, causes phase step always to change, learning-oriented count-down device now is difficult to work
Make to get up, it is necessary to use communication type count-down device.However, communication type count-down device is nor optimal.Because sometimes
（Such as, communication module meets with thunderbolt, and external interference signal density is big, and communication cable is broken etc.）, communication count-down device is with regard to nothing
Method works together.Further, generally detection countdown control panel quality needs connection LED fields just to observe, this
Sample maintenance countdown control panel is cumbersome.And at home, the count-down device of many producers is from control panel to panel field
Assembly line is relatively more, and assembling mode is also troublesome.
The content of the invention
The purpose of the present invention is that there is provided one for the defect of the limitation and reliability that overcome existing count-down device condition of work
Planting has learning functionality, also possesses communication function, and the communication learning type of the ability with Automatic Detection and Control plate failure falls
Timer.
The technical solution adopted by the present invention is：Learning type count-down device is communicated, it is characterized in that including microprocessor, it is described micro-
Processor detects circuit and real-time display circuit module, communication circuit module with constant-current drive circuit module, external signal respectively
With the connection of failure detector circuit module by signal, the external signal detection circuit and real-time display circuit module are also connected with outside letter
Number lightning protection circuit module；External signal by external signal after external signal lightning protection circuit module by detecting circuit and aobvious in real time
Show that circuit module is handled, export square wave to microprocessor processes, communication circuit module passes through the effective communication signal received
Microprocessor is transferred to after crossing conversion；Microprocessor on the one hand driving external signal detection circuit and real-time display circuit module
Light emitting diode lights it, on the other hand gathers the time of input signal；The external signal detection circuit and display in real time
Circuit module is made up of laser-emitting diode D1, cement resistor, current-limiting resistance, optocoupler, filter capacitor and light emitting diode, described
The laser-emitting diode D1 parallel connection cement resistors filter capacitor opposite with both direction；Described two filter capacitors in opposite direction point
Not Chuan Lian JP switches, the cement resistor connects with the optocoupler and filter capacitor that are in parallel, the optocoupler and the cement being in parallel
Resistance is connected with electric capacity；The communication circuit module is mainly made up of max485 chips and toggle switch, effective when receiving
Communication signal when, give microprocessor after the conversion of max485 chips and handled；The failure detector circuit module bag
Include two common-anode charactrons, LED light and PNP triode；The constant-current drive circuit module include 74HC245 chips,
ULN2003A chips, FET and NPN triode.
As a further improvement on the present invention, the external signal lightning protection circuit module is made up of some lightning protection circuits, institute
Lightning protection circuit is stated including piezo-resistance and gas-discharge tube, with another pressure after a gas-discharge tube piezo-resistance in parallel
Quick resistant series, the gas-discharge tube ground connection；The piezo-resistance in parallel with gas-discharge tube is connected external signal detection
Circuit and real-time display circuit module.
As a further improvement on the present invention, after the complete input signal of microprocessor processes, output needs the numeral shown
Signal gives 74HC245 chips, then ULN2003A chips is given by useful low and high level signal output, so as to control countdown
The negative electrode of LED fields.
As the further improvement of the present invention, the anode series limiting resistor of LED light is simultaneously connected to FET
Output end, negative electrode is directly grounded.
As the further improvement of the present invention, the anode of the charactron of the failure detector circuit module is by the poles of PNP tri-
Pipe is driven, and closure and the shut-off of triode are controlled by microprocessor, and the negative electrode of the charactron is straight by series limiting resistor
The output connect with ULN2003A chips connects one to one.
The beneficial effect that the present invention is used is：The count-down device of this structure just has the advantage that：1）Per AC signal all the way
Input all add lightning Protection Design, each several part circuit below is protected to greatest extent：2）Input cement in parallel
Resistance, in the optocoupler output shunt-wound capacitance of detection circuit, can make the square waveform for inputing to microprocessor more preferable：3）
Detection control panel accident design is added, which greatly enhances control panel breakdown judge and the efficiency of maintenance：4）Count-down device face
The mode of led fields is controlled simultaneously using anode and negative electrode on plate, enormously simplify wiring on from control panel to display panel
Quantity and the mode of connection；5）Learning functionality and communication function have been provided simultaneously with, and can have been realized between study and communication
Automatic fast transition.
Brief description of the drawings
Fig. 1 is schematic diagram of the invention.
Fig. 2 is schematic diagram of the present invention.
Fig. 3 is external signal lightning protection circuit module circuit diagram.
Fig. 4 is that external signal detects 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
With reference to Fig. 1 to Fig. 8, the present invention is described further.
As illustrated, communication learning type count-down device, it is characterized in that including microprocessor, the microprocessor respectively with perseverance
Flow drive circuit module, external signal detection circuit and real-time display circuit module, communication circuit module and failure detector circuit
Module by signal is connected, and the external signal detection circuit and real-time display circuit module are also connected with external signal lightning protection circuit mould
Block；External signal after external signal lightning protection circuit module by external signal by detecting at circuit and real-time display circuit module
Reason, exports square wave to microprocessor processes, communication circuit module transmits the effective communication signal received after conversion
To microprocessor；On the one hand driving external signal detection circuit and the light emitting diode of real-time display circuit module make microprocessor
It is lighted, and on the other hand gathers the time of input signal；The external signal detection circuit and real-time display circuit module are by LED
Display tube D1, cement resistor, current-limiting resistance, optocoupler, filter capacitor and light emitting diode composition, the laser-emitting diode D1 is simultaneously
Join the cement resistor filter capacitor opposite with both direction；Described two filter capacitors in opposite direction connect respectively JP switch,
The cement resistor is connected with the optocoupler and filter capacitor that are in parallel, the optocoupler and the cement resistor and electric capacity phase that are in parallel
Even；The communication circuit module is mainly made up of max485 chips and toggle switch, when receiving effective communication signal,
Microprocessor is given after the conversion of max485 chips to be handled；The failure detector circuit module includes two common anode numbers of poles
Code pipe, LED light and PNP triode；The constant-current drive circuit module includes 74HC245 chips, ULN2003A chips, field
Effect pipe and NPN triode.
External signal lightning protection circuit module is mainly made up of piezo-resistance and gas-discharge tube.When the exchange of outside input is believed
When number voltage becomes big suddenly, the circuit being made up of the piezo-resistance and gas-discharge tube of lightning protection circuit can be effectively by overvoltage
The earth is imported, so as to protect circuit below.External signal detects circuit and real-time display circuit module mainly by water
Mud resistance, current-limiting resistance, optocoupler, filter capacitor and light emitting diode composition.When outside AC signal smoothly passes through
Lightning protection circuit, enters optocoupler by current-limiting resistance and exports DC level, then after filter capacitor is filtered, export ideal
Square wave is detected after input signal to microprocessor processes, microprocessor, on the one hand drives the road light emitting diode to make its point
It is bright, on the other hand gather the time of the road input signal.Communication circuit module is mainly by max485 chips, toggle switch,
The peripheral circuit composition of max485 chips.When receiving effective communication signal, given after the conversion of max485 chips
Microprocessor is handled.Constant-current drive circuit module mainly by 74HC245 chips, ULN2003A chips, FET and
NPN triode is constituted.After the complete input signal of microprocessor processes, output needs the data signal shown to give 74HC245 cores
Piece, then gives ULN2003A chips by useful low and high level signal output, so as to control the negative electrode of countdown LED fields；Separately
Outside, after the complete input signal of microprocessor processes, show that the required color signal of display field gives triode, by triode come
Driving FET reaches the purpose of control field color.Failure detector circuit module mainly by two common-anode charactrons,
LED light（Red, yellow, and green）, PNP triode composition.The anode of charactron is mainly PNP triode to drive, then again by
Microprocessor controls closure and the shut-off of triode.The negative electrode of charactron is by series limiting resistor directly with ULN2003A cores
The output of piece connects one to one.Shown by LED fields so on countdown panel numeral just can by this two
Digital sum pipe simultaneous display comes out, and reaches the purpose of detection control panel quality, and it is control actually that easily can just can distinguish very much
The failure of plate or other failures, greatly improve detection efficiency.Further, color digital on panel is by LED light
Anode series limiting resistor and be connected to FET output end and negative electrode be directly grounded simulate come.
The present invention operation principle be：First, if the communication circuit module of count-down device detects correct communication signal
Afterwards, then by the processing of microprocessor, information is exported to constant-current driven module and fault detection module simultaneously, if now failure
Charactron and LED light in detection module are shown correctly, then illustrate that this count-down device is working properly under communication mode；Its
Secondary, when communication is broken down or semaphore does not have communication signal to send, microprocessor is cut immediately after Communications failure is confirmed
Change to mode of learning.The left-hand rotation lamp line that is inputted by INPUT interfaces and straight trip lamp line after external signal lightning protection circuit module,
Enter external signal detection circuit module and be transformed into digital signal level, be then sent through microprocessor and handled.Microprocessor
While external signal is fed back by LED light in real time, while collecting Wan Ge roads signal lamp in a cycle
The display time, the information after processing is then passed into constant current driving display module and fault detect mould simultaneously successively in order
Block.If the charactron and LED light in fault detection module are shown correctly, illustrate this count-down device work under mode of learning
Make normal.
The count-down device that the present invention is provided, it both has learning functionality, also possesses communication function, and with automatic detection
The ability of control panel failure.In the case of having effective communication signal, count-down device is operated in communication mode, if in communication
Disconnected, count-down device switchs to mode of learning automatically.When count-down device is operated in mode of learning, effectively communicated if receiving one group
Data, then count-down device switch to communication mode immediately.Moreover, when count-down device breaks down, fault detect electricity can be passed through
Easily find very much failure cause in road.So, improve count-down device control panel practicality and reliability simultaneously, its safeguard effect
Rate is also substantially increased.Finally, the control circuit of this count-down device is improved in field display output mode, is controlled simultaneously
The anode and negative electrode of display surface onboard led field, enormously simplify the quantity of wiring and wiring on from control panel to display panel
Mode.
The count-down device of this structure just has the advantage that：1）Lightning protection is all added per the input of AC signal all the way to set
Meter, protects each several part circuit below to greatest extent：2）Input cement resistor in parallel, it is in the optocoupler of detection circuit defeated
Go out to hold shunt-wound capacitance, the square waveform for inputing to microprocessor can be made more preferable：3）Detection control panel failure is added to set
Meter, which greatly enhances control panel breakdown judge and the efficiency of maintenance：4）The mode of count-down device face onboard led field is to use
Anode and negative electrode are controlled simultaneously, enormously simplify the quantity and the mode of connection of wiring on from control panel to display panel；5）Simultaneously
Possess learning functionality and communication function, and the automatic fast transition between study and communication can be realized.
Those skilled in the art, can also be it is to be understood that the protection scheme of the present invention is not limited only to the above embodiments
Various permutation and combination and conversion are carried out on the basis of above-described embodiment, on the premise of without prejudice to spirit of the invention, to the present invention
The various conversion carried out are all fallen within protection scope of the present invention.
Claims (5)
1. communicate learning type count-down device, it is characterized in that including microprocessor, the microprocessor respectively with constant-current drive circuit
Module, external signal detection circuit and real-time display circuit module, communication circuit module and failure detector circuit module by signal connect
Connect, the external signal detection circuit and real-time display circuit module are also connected with external signal lightning protection circuit module；External signal
By detecting that circuit and real-time display circuit module are handled by external signal after external signal lightning protection circuit module, rectangle is exported
The effective communication signal received is transferred to microprocessor by ripple to microprocessor processes, communication circuit module after conversion；
On the one hand driving external signal detection circuit and the light emitting diode of real-time display circuit module light it to microprocessor, another
Aspect gathers the time of input signal；The external signal detection circuit and real-time display circuit module are by laser-emitting diode D1, water
Mud resistance, current-limiting resistance, optocoupler, filter capacitor and light emitting diode composition, laser-emitting diode D1 cement resistor in parallel and
The opposite filter capacitor of both direction；Described two filter capacitors in opposite direction connect respectively JP switch, the cement resistor
Connected with the optocoupler and filter capacitor being in parallel, the optocoupler is connected with the cement resistor and electric capacity that are in parallel；The communication electricity
Road module is mainly made up of max485 chips and toggle switch, when receiving effective communication signal, by max485 cores
Microprocessor is given after piece conversion to be handled；The failure detector circuit module includes two common-anode charactrons, LED and indicated
Lamp and PNP triode；The constant-current drive circuit module includes 74HC245 chips, ULN2003A chips, FET and NPN
Triode.
2. communication learning type count-down device according to claim 1, it is characterized in that the external signal lightning protection circuit module
It is made up of some lightning protection circuits, the lightning protection circuit includes piezo-resistance and gas-discharge tube, the gas-discharge tube parallel connection one
Connected after individual piezo-resistance with another piezo-resistance, the gas-discharge tube ground connection；The pressure in parallel with gas-discharge tube
Quick resistance connection external signal detection circuit and real-time display circuit module.
3. it is according to claim 1 communication learning type count-down device, it is characterized in that the complete input signal of microprocessor processes it
Afterwards, output needs the data signal shown to give 74HC245 chips, then gives useful low and high level signal output
ULN2003A chips, so as to control the negative electrode of countdown LED fields.
4. communication learning type count-down device according to claim 3, it is characterized in that the anode series connection current limliting electricity of LED light
The output end of FET is hindered and is connected to, negative electrode is directly grounded.
5. communication learning type count-down device as claimed in any of claims 1 to 4, it is characterized in that the fault detect
The anode of the charactron of circuit module is driven by PNP triode, and closure and the shut-off of triode are controlled by microprocessor, described
Output of the negative electrode of charactron by series limiting resistor directly with ULN2003A chips connects one to one.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201410644492.8A CN104346941B (en) | 2014-11-14 | 2014-11-14 | Communicate learning type count-down device |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201410644492.8A CN104346941B (en) | 2014-11-14 | 2014-11-14 | Communicate learning type count-down device |
Publications (2)
| Publication Number | Publication Date |
|---|---|
| CN104346941A CN104346941A (en) | 2015-02-11 |
| CN104346941B true CN104346941B (en) | 2017-09-08 |
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Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| CN201410644492.8A Active CN104346941B (en) | 2014-11-14 | 2014-11-14 | Communicate learning type count-down device |
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Family Cites Families (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 |
| CN102938212B (en) * | 2012-11-08 | 2014-08-20 | 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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2014
- 2014-11-14 CN CN201410644492.8A patent/CN104346941B/en active Active
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| CN104346941A (en) | 2015-02-11 |
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