CN106920410A - A kind of intellectual traffic control method - Google Patents
A kind of intellectual traffic control method Download PDFInfo
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- CN106920410A CN106920410A CN201511003296.3A CN201511003296A CN106920410A CN 106920410 A CN106920410 A CN 106920410A CN 201511003296 A CN201511003296 A CN 201511003296A CN 106920410 A CN106920410 A CN 106920410A
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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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Abstract
A kind of self-adapting traffic signal countdown display device and its control method, it connects power management module and light color detection module and trigger signal detection module, count down information receiver module, display count down information module respectively including system scheduling module；Count down information receiver module connects wireless module, mixed-media network modules mixed-media, power carrier communication module, RS-485 communication modules respectively.The design architecture that the present invention is isolated using high-pressure modular with low-voltage module, high-pressure section uses light-coupled isolation with low-pressure section, both enhances the stability of a system, and maintenance is easy to again.Display is seamlessly transitted when the present invention makes every effort to accomplish that circuit simplification, stable performance, mode of operation switch, and the traffic signals inverse timing device of high performance price ratio and perfect in shape and function is provided for Control and management through ITS field.
Description
Technical field
The present invention is to be related to a kind of intellectual traffic control method, self-adapting traffic signal countdown display device and its control method,
Particularly a kind of self-adapting traffic signal countdown display device and its control method.
Background technology
At present, traffic signals countdown display device is widely used in intelligent traffic signal lamp control system, and its effect is main aobvious
Show Current traffic red, yellow, and green signal remaining time.The device has more using technical approach at present, single learning type, list RS-485
Communicatively, mono signal trigger-type, triggering study combined type, communication exercise combined type etc..Single learning type countdown display device is fitted
Together in the environment without the communications cable, expense is laid in saving, have the disadvantage display information when switch the period or cooperative type system oneself
Often occurs digital disturbance state in sensing and Self Adaptive Control；Single communication formula is adapted to count down information and points out changeable occasion, but
It is that can only extinguish countdown display device if communication disruption；Single-tap hairdo control mode has smoothed single learning type and single communication formula
Part contradiction, it has the disadvantage that part traffic signaling equipment does not have Trigger Function to complete normal count down information and shows.Due to list
There is many defects in the countdown display device of one control mode, many producers develop various combined type products, and such as triggering learns
The multiple products such as formula, communications triggered formula, communication exercise formula, extreme enrichment countdown display device market.Come in itself from product
Say, be all the product of stable performance, then from application function for generally existing it is not enough as follows：1) communication can not simultaneously be supported
Triggering study self adaptation；2) communication pattern must increase the communications cable；3) simple traffic guidance prompt message is not supported.Such as,
1. patent No. CN102938212A《Communication type road traffic signal countdown display》There is provided a kind of communicatively road
Traffic signals reverse-timing display device, the invention is not directed to learning type and trigger-type control method, it is impossible in the case of solving communication disruption
The problem that countdown is extinguished；
2. patent No. CN102750831A《Road traffic signal countdown display device》、CN103150917A《Road is handed over
Messenger countdown display device》With patent No. CN202177976U《A kind of counting down device of traffic signal lamp》Each provide
A kind of learning-oriented road traffic signal countdown display device, the invention is not directed to the solution of communications portion, it is impossible to provide true
Just solve the problems, such as countdown flow display during SPA sudden phase anomalies.
3. patent No. CN102682614A《The reverse-timing display device and display control method of trigger-type control display》There is provided one
Trigger-type control display reverse-timing display device is planted, communication and mode of learning is not directed to so that application flexibility is slightly inadequate.
4. patent No. CN202177976U《A kind of counting down device of traffic signal lamp》It is aobvious based on dot matrix there is provided one kind
The learning type count-down device of display screen, shortcoming is similar with the count-down device of the 2nd type.
The content of the invention
The present invention takes over seamlessly adaptive algorithm using communication, triggering and study, supports traffic signal counter-down time-recorder in communication, touches
Automatic smoothing switching between hair and mode of learning, solves the self adaptation traffic of the puzzlement that system upgrade needs to change corresponding count-down device
Signal countdown display device and its control method.
The present invention is achieved by the following technical solution：A kind of self-adapting traffic signal countdown display device, its main skill
Art be characterized in it including system scheduling module connect respectively power management module and light color detection module and trigger signal detection module,
Count down information receiver module, display count down information module；Count down information receiver module connects wireless module, network mould respectively
Block, power carrier communication module, RS-485 communication modules；Power management module is using RS407 bridges heap composition bridge rectifier electricity
Road, light color detection module and trigger signal detection module provide lamp state by diode S2M and bleeder circuit by P521 optocouplers
Signal to single-chip microcomputer STC15W408S I/O port；Wireless receiving module selects general module, and its output signal is RS-232
Serial signal, is transmitted to the I/O port of STC15W408S by the interface chip MAX232 on control panel；
RS-485 data reception modules chip uses the serial pieces of technical grade RS-485 of model 65LBC3082；Power line carrier module
Carrier chip uses SC1128 spread spectrum communication chips；System scheduling module is CPU module, including STC15W408S single-chip microcomputers,
MAX232 serial communication chips and I/O port；Countdown and the stroke system countdown display module of succinct induction information display module,
Countdown color is controlled using IRF9540, chip ULN2803 drives stroke；Countdown and succinct induction information display module
Whether lattice display module realizes receiving and show communication count down information by dial-up；Display module is driven to use chip
APM4953, data/address bus isolating chip model 74HC245, then drive lattice display corresponding by drive module 74HC595
Countdown or induction information；
The power management module connects the positive and negative diode of model 4007 for the turnover two-way of bridge rectifier respectively, then simultaneously
Join the input together as Switching Power Supply；
A kind of control method of self-adapting traffic signal countdown display device, it is characterised in that the control method is by power supply pipe
The power supply that reason module is automatically performed traffic signal counter-down time-recorder device is obtained and switch operating；Described light color is detected by light color
Acquisition module completion light color collection offer Transistor-Transistor Logic level signal to data processing unit is made light color detection and is used；And communication interface is then used
To receive the countdown instruction transmitted from traffic signal controlling machine, data processing unit is sent to after communication chip is gathered,
Parsed by running on the treatment progress in the processing unit, be then forwarded to system scheduling module；System scheduling module then root
The mode adaptive control method for being respectively communicatively, trigger-type and learning type from high to low according to priority completes output signal switching；
Output mode changing method uses toggle switch DIP dial-up control methods, and selection output mode is dot pattern or stroke bar pattern
Exported；
The control of power management module and management method use 6 by signal lamp light color power-supply circuit in described control method
After RS407 bridge heap rectifications, by each 6 4007 diodes in parallel of both positive and negative polarity as Switching Power Supply input, by Switching Power Supply
The DC24V dc sources VDD1 that generation countdown display device can be used directly；VDD1 seals in a S2M diode,
Solar cell for supplying power positive pole also seals in a S2M diode, and the electric current that parallel connection can provide 2A shows to traffic signals countdown
Device stable power-supplying；
Signal acquisition part method is to complete signal jointly by S2M diodes and EL817 optocouplers to adopt in described control method
Collect, and isolation is carried out to interior external circuit by EL817 and ensure that control mainboard core component is protected, the output port of EL817
The I/O port of high-speed central processing unit STC15W408S is accessed, signal acquisition is completed via high-speed central processing unit；Collection
Signal via central processing unit complete signal lamp color distinguish, sequential record and Time Calculation；Distinguish light color and use localization method
It is position positioning mode, pin is accessed as foundation by signal, supports 3 signals and 6 accesses of signal；3 signals are accessed
When, signal sequence is green, yellow, red；When 6 signals are accessed, signal sequence is green 1, yellow 1, red 1, green 2, yellow 2, red 2；
Sequential
Record is detected and preserved using I/O port；Signal time computational methods are to be constituted using the pattern of hoop, green 1, yellow 1, red 1
1st ring, green 2, yellow 2, red 2 constitute the 2nd hoop, and the signal duration of two hoops is counted respectively, next
During the cycle, correspondence light color is exported；Completed using adaptive algorithm in phase duration statistical method the system, when phase
Change long is less than 1.8 seconds, not updates the data；Change is more than 1.8s, and when being less than 3s, updates 2 seconds；When phase place change is big
When 3s, real-time update data；
Communication channel selecting method is by access network interface or accesses the communication interfaces such as RS-485 in described control method
Data make a distinction, by network communication interface chip RTL8019AS complete networked physics layer connect, using 65HVD3082
Serial interface chip completes the connection of RS-485 communication physical layers.Signal of communication accesses the network and serial incoming end of central processing unit
Mouthful, complete network data communication process.The work such as data receiver software module completes to receive, unpack, package and transmission.Data
After unpacking submit to light color output scheduling module, will after current countdown display device state package submit to communication interface chip send to
Traffic signalization main frame；
The dispatching method of the system self-adaption scheduler module of described control method high speed CPU STC15W408S
It is the core of system；Self-adapting dispatching method, is divided into state examination, pattern and determines, extracts data and countdown 4 ranks of output
Section.State is screened and mode determining method：1st, learning data, triggering state and communication data are first gathered simultaneously；If the 2, even
Continuous 3 communication error is transferred to triggering state detection, and triggering state is present then covers current phase count down information, and next phase is opened
Begin to use triggering pattern；If in a cycle, not having any trigger signal, next cycle starts system and enters mode of learning；3、
Under mode of learning, there is 1 correct signal of communication, communication pattern is transferred to immediately；If occurred without correct communication data, 1
In the individual cycle, there is trigger signal in the red Green City of some phase, or the green signal of any two out of phase is triggered or appointed
Two outs of phase of meaning have red signal to trigger, and system switches to triggering pattern；If 1 correct communication under triggering pattern
Signal, system is transferred to communication pattern immediately.Data and countdown the output intent then pattern according to residing for current system are extracted, is transferred
Countdown light color data, after judging that output display mode is dot pattern or stroke bar pattern, export corresponding countdown color and
Countdown shows digital information.
Communication pattern of the present invention supports wireless mode, carrier mode and wired communication modes, there is provided flexible communications transmission mode；Touch
Hair supports the wide scope trigger pulse of 100ms~300ms, supports the trigger signal of Multiple Type semaphore output；Under mode of learning
Support monocycle study display mode；Display module not only supports stroke bar single digit, dual number digits and multidigit display mode, also
Lattice display module is supported, simple prompt message can be supported, meet the various display demands of user.The present invention uses high-pressure modular
The design architecture isolated with low-voltage module, high-pressure section uses light-coupled isolation with low-pressure section, both enhances the stability of a system, and
It is easy to maintenance.Display is seamlessly transitted when the present invention makes every effort to accomplish that circuit simplification, stable performance, mode of operation switch, and is intelligent friendship
Logical control and management domain provide the traffic signals inverse timing device of high performance price ratio and perfect in shape and function.
Circuit design of the present invention is succinct, and display is seamlessly transitted when stable performance, mode of operation switch；Triggering part is supported
100~300ms wide scope pulse-triggereds；Learning time is short, it is only necessary to which a complete cycle can display count down information；Support pen
Picture countdown shows and dot matrix countdown shows；High-voltage acquisition circuit is completely isolated with low-voltage testing circuit, enhances system safety
Property and be easy to safeguard.Communications portion uses the serial communication chip 65LBC3082 of technical grade 485, supports that RS-485 serially passes through square
Formula；Device involved in the present invention is designed with carrier communication peripheral circuit module, and carrier chip uses SC1128 spread spectrum communication chips.
Device involved in the present invention increased mixed-media network modules mixed-media i.e. network service expansion module, and network service chip uses RTLS019AS；
, using closed loop mode of learning, comprehensive triggering and signal of communication is based on, dynamic is flat in real time for communication, triggering and mode of learning scheduling switching
Sheave out corresponding count down information.RS-232 chips use technical grade MAX232 chips, and light is implemented using optocoupler EL817
Electric isolution.Wireless communication module uses 470Mhz wireless communication modules.Central processing unit uses STC15W408S single-chip microcomputers,
60~420MHz can reach using 1T patterns (1 clock cycle/instruction) dominant frequency, equivalent to the 7~12 of common 8051 single-chip microcomputer
Times.
Brief description of the drawings：
Fig. 1 is self-adapting traffic signal countdown display device operation principle；
Fig. 2 is self-adapting traffic signal countdown display device schematic diagram；
Fig. 3 is power management concepts figure；
Fig. 4 is signal acquisition circuit schematic diagram；
Fig. 5 is system control method software flow pattern.
Specific embodiment
As Figure 1-Figure 4,1 is power management and signal acquisition module, comprising module as shown in Figure 3 and Figure 4, power supply pipe
Reason part uses RS407 bridge heaps as rectification circuit, as long as 3~6 groups of signals have one group of offer power supply to ensure that control module
Operating voltage can normally be obtained；By S2M and bleeder circuit lamp state signal to single-chip microcomputer is provided by EL817 optocouplers
The I/O port of STC15W408S, Signal acquiring and processing is completed by completing STC15W408S.
2 is wireless receiving module, and receiver module selects general module, and its output signal is RS-232 serial signals, by control
Interface chip MAX232 on plate is transmitted to the I/O port of STC15W408S, uses software read port, input-buffer to obtain
To corresponding data, countdown display information is obtained.
3 is RS-485 data reception modules, and the module is mainly used in the reception of general RS-485 serial networks data.The module
Chip uses the serial pieces of technical grade RS-485 of model 65LBC3082.
4 is power line carrier module, and the carrier chip of the module uses SC1128 spread spectrum communication chips, can stablize and transmit and receive
Count down information.
5 is mixed-media network modules mixed-media, and the interface chip of the module uses RTL8019AS communication chips, can receive to fall to count by the chip
When information and succinct induction information.
6 is CPU module, including STC15W408S single-chip microcomputers, MAX232 serial communication chips and I/O port.
7 is countdown and succinct induction information display module.1) stroke system countdown display module, is fallen using IRF9540 controls
Timing color, ULN2803 drives stroke；2) lattice display module, supports succinct induction information, by dial-up realize whether
Receive and display communication count down information.1) pattern when not showing count down information, when only providing green signal, Display of Chinese characters " slow "；
Display of Chinese characters " stopping " during red signal.2) when showing count down information pattern, communication count down information is received, then shows countdown number
After being worth 1, after 2 seconds time-out, display correspondence traffic signals, green " slow " is red " stopping ".Countdown is controlled using APM4953 and is lured
Information color is led, design is used as data/address bus isolating chip by 74HC245, then drives lattice display phase by 74HC595
The countdown answered or induction information.
Apparatus of the present invention are reliable and stable, and count down information shows seamless switching under Three models (communication, triggering and study),
Flow display corresponding information.Various communication access modes are supported, user is easy to use, be adapted to show in various traffic signal controls
Show count down information；There is provided succinct induction information to show, make the more hommization of count-down device display information.Installation and debugging are operated
It is convenient.
Present invention application is made up of cooperative type intellectual traffic control main frame and the part of self-adapting traffic signal countdown display device 2, from
Adaptation traffic signals countdown display device can receive cooperative type intellectual traffic control main frame and be connect by RS-232 interface, RS-485
Mouth, radio communication, power carrier interface and network communication data, or by traffic lights light color signal output trigger message,
Corresponding count down information or succinct induction information are shown after treatment.The innovation of the system is：1) communication, triggering are supported
Exclusive with the count down information of three kinds of modes of study seamlessly transits scheduling method；2) communication mode supports various ways communication interface,
Support wireless communication module, power line carrier module, network communication module etc.；3) present apparatus supports that stroke system, two kinds of dot matrix show
Show mode；4) using the Switching Power Supply of independent research as control module and the power supply of display module so that product consumable accessory is changed
It is convenient.
The control method of this self-adapting traffic signal countdown display device, is to be automatically performed traffic signals by power management module
The power supply of count-down device device is obtained and switch operating；Described light color detection completes light color collection and carries by light color acquisition module
Make light color detection for Transistor-Transistor Logic level signal to data processing unit to use；And communication interface is then used for receiving from traffic signal controlling machine
The countdown instruction for transmitting, data processing unit is sent to after communication chip is gathered, by running on the processing unit in
Treatment progress parsed, be then forwarded to system scheduling module；System scheduling module is then distinguished from high to low according to priority
For the mode adaptive control method of communicatively, trigger-type and learning type completes output signal switching；Output mode changing method is adopted
With toggle switch DIP dial-up control methods, selection output mode is that dot pattern or stroke bar pattern are exported；
The control of power management module and management method use 6 by signal lamp light color power-supply circuit in described control method
After RS407 bridge heap rectifications, by each 6 4007 diodes in parallel of both positive and negative polarity as Switching Power Supply input, by Switching Power Supply
The DC24V direct currents VDD1 that generation countdown display device can be used directly；VDD1 seals in a S2M diode, too
It is positive can battery positive pole of powering also seal in a S2M diode, the electric current that parallel connection can provide 2A gives traffic signals countdown display dress
Put stable power-supplying；
Signal acquisition part method is to complete signal jointly by S2M diodes and EL817 optocouplers to adopt in described control method
Collect, and isolation is carried out to interior external circuit by EL817 and ensure that control mainboard core component is protected, the output port of EL817
The I/O port of high-speed central processing unit STC15W408S is accessed, signal acquisition is completed via high-speed central processing unit；Collection
Signal via central processing unit complete signal lamp color distinguish, sequential record and Time Calculation；Distinguish light color and use localization method
It is position positioning mode, pin is accessed as foundation by signal, supports 3 signals and 6 accesses of signal；3 signals are accessed
When, signal sequence is green, yellow, red；When 6 signals are accessed, signal sequence is green 1, yellow 1, red 1, green 2, yellow 2, red 2；
Sequential
Record is detected and preserved using I/O port；Signal time computational methods are to be constituted using the pattern of hoop, green 1, yellow 1, red 1
1st ring, green 2, yellow 2, red 2 constitute the 2nd hoop, and the signal duration of two hoops is counted respectively, next
During the cycle, correspondence light color is exported；Completed using adaptive algorithm in phase duration statistical method the system, when phase
Change long is less than 1.8 seconds, not updates the data；Change is more than 1.8s, and when being less than 3s, updates 2 seconds；When phase place change is big
When 3s, real-time update data；
Communication channel selecting method is by access network interface or accesses the communication interfaces such as RS-485 in described control method
Data make a distinction, by network communication interface chip RTL8019AS complete networked physics layer connect, using 65HVD3082
Serial interface chip completes the connection of RS-485 communication physical layers.Signal of communication accesses the network and serial incoming end of central processing unit
Mouthful, complete network data communication process.The work such as data receiver software module completes to receive, unpack, package and transmission.Data
After unpacking submit to light color output scheduling module, will after current countdown display device state package submit to communication interface chip send to
Traffic signalization main frame；
The dispatching method of the system self-adaption scheduler module of described control method high speed CPU STC15W408S
It is the core of system；Self-adapting dispatching method, is divided into state examination, pattern and determines, extracts data and countdown 4 ranks of output
Section.State is screened and mode determining method：1st, learning data, triggering state and communication data are first gathered simultaneously；If the 2, even
Continuous 3 communication error is transferred to triggering state detection, and triggering state is present then covers current phase count down information, and next phase is opened
Begin to use triggering pattern；If in a cycle, not having any trigger signal, next cycle starts system and enters mode of learning；3、
Under mode of learning, there is 1 correct signal of communication, communication pattern is transferred to immediately；If occurred without correct communication data, 1
In the individual cycle, there is trigger signal in the red Green City of some phase, or the green signal of any two out of phase is triggered or appointed
Two outs of phase of meaning have red signal to trigger, and system switches to triggering pattern；If 1 correct communication under triggering pattern
Signal, system is transferred to communication pattern immediately.Data and countdown the output intent then pattern according to residing for current system are extracted, is transferred
Countdown light color data, after judging that output display mode is dot pattern or stroke bar pattern, export corresponding countdown color and
Countdown shows digital information.
Communication pattern of the present invention supports wireless mode, carrier mode and wired communication modes, there is provided flexible communications transmission mode；Touch
Hair supports the wide scope trigger pulse of 100ms~300ms, supports the trigger signal of Multiple Type semaphore output；Under mode of learning
Support monocycle study display mode；Display module not only supports stroke bar single digit, dual number digits and multidigit display mode, also
Lattice display module is supported, simple prompt message can be supported, meet the various display demands of user.The present invention uses high-pressure modular
The design architecture isolated with low-voltage module, high-pressure section uses light-coupled isolation with low-pressure section, both enhances the stability of a system, and
It is easy to maintenance.Display is seamlessly transitted when the present invention makes every effort to accomplish that circuit simplification, stable performance, mode of operation switch, and is intelligent friendship
Logical control and management domain provide the traffic signals inverse timing device of high performance price ratio and perfect in shape and function.
Circuit design of the present invention is succinct, and display is seamlessly transitted when stable performance, mode of operation switch；Triggering part is supported
100~300ms wide scope pulse-triggereds；Learning time is short, it is only necessary to which a complete cycle can display count down information；Support pen
Picture countdown shows and dot matrix countdown shows；High-voltage acquisition circuit is completely isolated with low-voltage testing circuit, enhances system safety
Property and be easy to safeguard.Communications portion uses the serial communication chip 65LBC3082 of technical grade 485, supports that RS-485 serially passes through square
Formula；Device involved in the present invention is designed with carrier communication peripheral circuit module, and carrier chip uses SC1128 spread spectrum communication chips.
Device involved in the present invention increased mixed-media network modules mixed-media i.e. network service expansion module, and network service chip uses RTL8019AS；
, using closed loop mode of learning, comprehensive triggering and signal of communication is based on, dynamic is flat in real time for communication, triggering and mode of learning scheduling switching
Sheave out corresponding count down information.RS-232 chips use technical grade MAX232 chips, and light is implemented using optocoupler EL817
Electric isolution.Wireless communication module uses 470Mhz wireless communication modules.Central processing unit uses STC15W408S single-chip microcomputers,
60~420MHz can reach using 1T patterns (1 clock cycle/instruction) dominant frequency, equivalent to the 7~12 of common 8051 single-chip microcomputer
Times.
Claims (3)
1. a kind of self-adapting traffic signal countdown display device, it is characterised in that it connects power management respectively including system scheduling module
Module and light color detection module and trigger signal detection module, count down information receiver module, display count down information module；
Clocking information receiver module connects wireless module, mixed-media network modules mixed-media, power carrier communication module, RS-485 communication modules respectively；Power supply
Management module constitutes bridge rectifier using RS407 bridges heap, and light color detection module and trigger signal detection module pass through diode
S2M and bleeder circuit provide the I/O port of lamp state signal to single-chip microcomputer STC15W408S by P521 optocouplers；Wireless receiving
Module selects general module, and its output signal is RS-232 serial signals, is passed by the interface chip MAX232 on control panel
Transport to the I/O port of STC15W408S；RS-485 data reception modules chip uses model 65LBC3082
The serial pieces of technical grade RS-485；The carrier chip of power line carrier module uses SC1128 spread spectrum communication chips；System call mould
Block is CPU module, including STC15W408S single-chip microcomputers, MAX232 serial communication chips and I/O port；Countdown and letter
The stroke system countdown display module of clean induction information display module, countdown color, chip ULN2803 are controlled using IRF9540
Drive stroke；Whether the lattice display module of countdown and succinct induction information display module realizes receiving and show logical by dial-up
Letter count down information；Display module is driven to use chip APM4953, data/address bus isolating chip model 74HC245, then
The corresponding countdown of lattice display or induction information are driven by drive module 74HC595.
2. a kind of self-adapting traffic signal countdown display device as claimed in claim 1, it is characterised in that the power management module
For the turnover two-way of bridge rectifier connects the positive and negative diode of model 4007 respectively, then parallel connection is together as Switching Power Supply
Input.
3. a kind of control method of self-adapting traffic signal countdown display device as claimed in claim 1, it is characterised in that the control
Method is that the power supply for being automatically performed traffic signal counter-down time-recorder device by power management module is obtained and switch operating；It is described
Light color detection by light color acquisition module complete light color collection provide Transistor-Transistor Logic level signal to data processing unit make light color detection make
With；And communication interface is then used for receiving the countdown instruction transmitted from traffic signal controlling machine, after communication chip is gathered
Data processing unit is sent to, is parsed by running on the treatment progress in the processing unit, be then forwarded to system call mould
Block；System scheduling module is then respectively the mode adaptive control of communicatively, trigger-type and learning type from high to low according to priority
Method completes output signal switching；Output mode changing method uses toggle switch DIP dial-up control methods, selects output mode
It is that dot pattern or stroke bar pattern are exported；
The control of power management module and management method use 6 by signal lamp light color power-supply circuit in described control method
After RS407 bridge heap rectifications, by each 6 4007 diodes in parallel of both positive and negative polarity as Switching Power Supply input, by Switching Power Supply
The DC24V dc sources VDD1 that generation countdown display device can be used directly；VDD1 seals in a S2M diode,
Solar cell for supplying power positive pole also seals in a S2M diode, and the electric current that parallel connection can provide 2A shows to traffic signals countdown
Device stable power-supplying；
Signal acquisition part method is to complete signal jointly by S2M diodes and EL817 optocouplers to adopt in described control method
Collect, and isolation is carried out to interior external circuit by EL817 and ensure that control mainboard core component is protected, the output port of EL817
The I/O port of high-speed central processing unit STC15W408S is accessed, signal acquisition is completed via high-speed central processing unit；Collection
Signal via central processing unit complete signal lamp color distinguish, sequential record and Time Calculation；Distinguish light color and use localization method
It is position positioning mode, pin is accessed as foundation by signal, supports 3 signals and 6 accesses of signal；3 signals are accessed
When, signal sequence is green, yellow, red；When 6 signals are accessed, signal sequence is green 1, yellow 1, red 1, green 2, yellow 2, red 2；
Sequential record is detected and preserved using I/O port；Signal time computational methods be using the pattern of hoop, green 1, yellow 1, red 1 group
The 2nd hoop is constituted into the 1st ring, green 2, yellow 2, red 2, the signal duration of two hoops is counted respectively, next
During the individual cycle, correspondence light color is exported；Completed using adaptive algorithm in phase duration statistical method the system, work as phase
Duration change is less than 1.8 seconds, not updates the data；Change is more than 1.8s, and when being less than 3s, updates 2 seconds；Work as phase place change
During more than 3s, real-time update data；
Communication channel selecting method is by access network interface or accesses the communication interfaces such as RS-485 in described control method
Data make a distinction, by network communication interface chip RTL8019AS complete networked physics layer connect, it is serial using 65HVD3082
Interface chip completes the connection of RS-485 communication physical layers；Signal of communication accesses the network and serial access interface of central processing unit, complete
Into network data communication process；The work such as data receiver software module completes to receive, unpack, package and transmission；After data are unpacked
Submit light color output scheduling module to, communication interface chip will be submitted to send best friend's communication after current countdown display device state package
Number control main frame；
The dispatching method of the system self-adaption scheduler module of described control method high speed CPU STC15W408S is
The core of system；Self-adapting dispatching method, is divided into state examination, pattern and determines, extracts data and countdown 4 stages of output；
State is screened and mode determining method：1st, learning data, triggering state and communication data are first gathered simultaneously；If the 2nd, continuous 3 times
Communication error is transferred to triggering state detection, and triggering state is present then covers current phase count down information, and next phase begins to use
Triggering pattern；If in a cycle, not having any trigger signal, next cycle starts system and enters mode of learning；3rd, learning
Under habit pattern, there is 1 correct signal of communication, communication pattern is transferred to immediately；If occurred without correct communication data, 1
In cycle, there is trigger signal in the red Green City of some phase, or the green signal of any two out of phase is triggered or appointed
Two outs of phase of meaning have red signal to trigger, and system switches to triggering pattern；If 1 correct communication under triggering pattern
Signal, system is transferred to communication pattern immediately；Data and countdown the output intent then pattern according to residing for current system are extracted, is transferred
Countdown light color data, after judging that output display mode is dot pattern or stroke bar pattern, export corresponding countdown color and
Countdown shows digital information.
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