CN101546483B - System and method for fault diagnosis of traffic signal controller - Google Patents
System and method for fault diagnosis of traffic signal controller Download PDFInfo
- Publication number
- CN101546483B CN101546483B CN2008101027985A CN200810102798A CN101546483B CN 101546483 B CN101546483 B CN 101546483B CN 2008101027985 A CN2008101027985 A CN 2008101027985A CN 200810102798 A CN200810102798 A CN 200810102798A CN 101546483 B CN101546483 B CN 101546483B
- Authority
- CN
- China
- Prior art keywords
- voltage
- circuit
- electric current
- fault detection
- detection board
- Prior art date
- Legal status (The legal status is an assumption and is not a legal conclusion. Google has not performed a legal analysis and makes no representation as to the accuracy of the status listed.)
- Expired - Fee Related
Links
- 238000003745 diagnosis Methods 0.000 title claims abstract description 28
- 238000000034 method Methods 0.000 title claims abstract description 16
- 238000001514 detection method Methods 0.000 claims abstract description 207
- 238000004891 communication Methods 0.000 claims abstract description 31
- 210000003205 muscle Anatomy 0.000 claims description 8
- 230000001360 synchronised effect Effects 0.000 claims description 8
- 238000012545 processing Methods 0.000 claims description 7
- 238000012360 testing method Methods 0.000 claims description 5
- 230000004044 response Effects 0.000 claims description 4
- 230000002159 abnormal effect Effects 0.000 claims description 3
- 238000004458 analytical method Methods 0.000 abstract description 2
- 238000012544 monitoring process Methods 0.000 abstract 1
- 238000010586 diagram Methods 0.000 description 7
- 238000006243 chemical reaction Methods 0.000 description 4
- 230000000694 effects Effects 0.000 description 4
- 238000005516 engineering process Methods 0.000 description 3
- 238000011897 real-time detection Methods 0.000 description 2
- XUIMIQQOPSSXEZ-UHFFFAOYSA-N Silicon Chemical compound [Si] XUIMIQQOPSSXEZ-UHFFFAOYSA-N 0.000 description 1
- 239000008186 active pharmaceutical agent Substances 0.000 description 1
- 230000005540 biological transmission Effects 0.000 description 1
- 230000015572 biosynthetic process Effects 0.000 description 1
- 230000007812 deficiency Effects 0.000 description 1
- 238000013461 design Methods 0.000 description 1
- 230000006870 function Effects 0.000 description 1
- 230000007257 malfunction Effects 0.000 description 1
- 238000004519 manufacturing process Methods 0.000 description 1
- 230000001681 protective effect Effects 0.000 description 1
- 238000012797 qualification Methods 0.000 description 1
- 229910052710 silicon Inorganic materials 0.000 description 1
- 239000010703 silicon Substances 0.000 description 1
Images
Landscapes
- Traffic Control Systems (AREA)
Abstract
The invention discloses a system and a method for fault diagnosis of a traffic signal controller. The method comprises the following steps: a fault detection board is connected with a plurality of voltage and current detection boards; the voltage and current detection boards are used for detecting the voltage and the current information of each path of alternating current output of the traffic signal controller, the fault detection board performs communication with each voltage and current detection board at regular time, searches the voltage and the current information and performs green conflict detection and other fault judgment for the traffic signal controller according to the defined rule in advance; under the unusual circumstance, a master control board of the traffic signal controller is warned, and the concrete fault type is displayed through an indicating lamp of the panel; if a serious fault occurs, the fault detection board provides an alternating current relay output signal to control the output of the traffic signal controller so as to switch the traffic signal controller to a flashing yellow state; and the invention provides the fault diagnosis system and the fault diagnosis method which are independent from the traffic signal controller, can perform real-time monitoring and fault analysis to the running state of the signal controller and fills the gap of the prior art.
Description
Technical field
The invention belongs to intelligent transportation control and administrative skill field, relate to a kind of fault diagnosis the road traffic signal controller.
Background technology
Traffic signal control is used for the traffic lights signal controlling of urban road intersection, pedestrian's street crossing and through street inlet, be that vehicle is commanded and the important component part of the traffic signal control system dredged, its safety and reliability directly concern traffic circulation safety.Because signal controller is installed in the urban road crossing, work under bad environment is subjected to external interference easily, can produce signal lamp failure, controllable silicon fault etc., if can not in time diagnose and handle to these faults, may bring out traffic hazard, cause traffic jam, cause serious consequence.So the running status to traffic signal control is monitored in real time, and carry out fault diagnosis, when generation is unusual, take appropriate measures, strengthen its anti-interference and protective capacities, have great importance.
The most existing traffic signal control is relatively paid attention to the function realization of signal controller in the design production run, and less to the fault diagnosis technology consideration of signal controller, can not well satisfy the requirement of signal controller actual working environment.Signal controller with fault detection capability does not generally have independently fault detection module, but is integrated in the signal controller, in case signal controller operational failure, fault detection capability also lost efficacy thereupon, the effect that does not reach fault detection and diagnosis.And the detection failure type is single, and the detection of green collision failure is generally only arranged.
Summary of the invention
In order to remedy the problems referred to above that existing method for diagnosing faults exists, the invention provides a kind of fault diagnosis system that is independent of outside the signal controller, it comprises a fault detection board and polylith electric current and voltage check-out console, can the real time detection signal controller all exchange the voltage and current state of output, and carry out fault diagnosis according to predefined rule, when generation is unusual, report to the police to the signal controller master control borad, and on the front panel of fault detection board, show fault type, when catastrophic failure takes place, can provide the AC relay output signal, be used for the control signal lamp and be outputted to yellow sudden strain of a muscle state.
In order to realize above-mentioned purpose of the present invention, an aspect of of the present present invention provides a kind of fault detection system of traffic signal control, comprising:
One controller has the AC signal output terminal;
Polylith electric current and voltage check-out console is connected with the AC signal output terminal of controller, is used for the voltage of every road AC signal of controller and the electric current of each passage AC signal are detected in real time, and preserves detected value in the internal memory of electric current and voltage check-out console;
One universal serial bus, between electric current and voltage check-out console and fault detection board, be used to make the electric current and voltage check-out console to receive the query messages of fault detection board, and the voltage and current detected value of electric current and voltage check-out console is sent to fault detection board according to set form as message;
One fault detection board connects by null modem cable between the master control borad of controller, after being used for fault detection board and diagnosing the fault of controller, sends the voltage and current detected value of fault status information to the master control borad of controller;
The master control borad of one controller is used to receive the voltage and current detected value of fault status information, and preserves fault log.
Fault detection system according to the described traffic signal control of the embodiment of the invention, wherein, the voltage detecting value of described electric current and voltage check-out console output, be by resistor network the alternating current 220V voltage signal to be reduced to exchange the 5V voltage signal, be converted into direct current signal by the A/D change-over circuit then, obtain the voltage detecting value.
Fault detection system according to the described traffic signal control of the embodiment of the invention, wherein, the current detection value of described electric current and voltage check-out console output, be by D.C mutual-inductor the alternating current 220V current signal to be converted into to exchange the 5V voltage signal, be converted into direct current signal by the A/D change-over circuit then, obtain current detection value.
According to the fault detection system of the described traffic signal control of the embodiment of the invention, wherein, described fault detection board is monitored the running status of controller according to the voltage and current detected value and the predefined rule of the output of electric current and voltage check-out console; When abnormal conditions took place, fault detection board sent fault status information to the controller master control borad, and showed the fault particular type by the front panel pilot lamp of fault detection board; When catastrophic failure took place, fault detection board was used to control the output of controller for controller provides an AC relay output signal, with the yellow sudden strain of a muscle state of being outputted to of controller.
Fault detection system according to the described traffic signal control of the embodiment of the invention, wherein, the output of all ac output ends of described controller is the voltage signal and the current signal of every road signal lamp of exporting simultaneously, and the electric current and voltage check-out console detects is the current signal of the signal lamp group of the voltage signal of every road signal lamp and red, yellow, green three signal lamps composition; When fault detection board inquiry electric current and voltage check-out console, send the voltage and current detected value data that detection obtains to fault detection board by the electric current and voltage check-out console.
According to the fault detection system of the described traffic signal control of the embodiment of the invention, wherein, described fault detection board comprises:
One single-chip minimum system circuit is connected with real time clock circuit by data address bus, is used for being provided with and the time for reading value; The single-chip minimum system circuit is connected with address decoding circuitry, is used to provide three address decode signals to address decoding circuitry;
One serial ports circuit has a RS232 interface and is connected with the single-chip minimum system circuit;
One address decoding circuitry is connected with real time clock circuit, communication expanded circuit respectively, and the address signal that provides of real time clock circuit, communication expanded circuit is provided;
One group of pilot lamp control circuit is connected with fault detection board, is used for the pilot lamp of control fault check-out console front panel; The single-chip minimum system circuit is connected with the pilot lamp control circuit, is used to provide the data-signal and the clock signal of each pilot lamp control circuit;
One data key circuit is connected with the single-chip minimum system circuit by the MICROWIRE data-interface, is used for the storage failure judgment rule;
+ 12VDC and+the 24VDC testing circuit, with the single-chip minimum system circuit+12VDC and+the 24VDC direct supply is connected, be used to detect+electric power thus supplied of 12VDC and+24VDC direct supply;
One communication expanded circuit is used to expand the synchronous serial interface that fault detection board is communicated by letter with the electric current and voltage check-out console, and the communication expanded circuit is connected with the single-chip minimum system circuit;
One Differencing communication change-over circuit is connected with outside 64 pin mouths with the communication expanded circuit respectively, is used for the synchronous serial communication signal is converted into differential signal;
One voltage detecting circuit is connected with outside 64 pin mouths with the single-chip minimum system circuit respectively, is used to detect the Alternating Current Power Supply voltage of signals of controller;
One linear power supply circuit is used to provide the power supply of all modules of fault detection board;
One control relay circuit is connected with outside 64 pin mouths with the single-chip minimum system circuit respectively, is used to controller that an AC relay output signal is provided.
According to the fault detection system of the described traffic signal control of the embodiment of the invention, wherein the electric current and voltage check-out console comprises:
One single-chip minimum system circuit is connected with the AccessPort circuit with the A/D change-over circuit respectively, and the single-chip minimum system circuit is used to receive the detection data of the 5V ac voltage signal of A/D change-over circuit;
One voltage detecting circuit and current detection circuit detect the voltage and current that exchanges output of controller respectively by 96 needle interfaces, are translated into the 5V ac voltage signal;
One channel selection circuit is connected with voltage follower circuit with channel selection circuit, and the interchange output channel of controller is selected, and realizes the detection one by one of each passage;
One voltage follower circuit is connected with the A/D change-over circuit with channel selection circuit respectively, is used for the 5V ac voltage signal output with channel selection circuit;
One A/D change-over circuit, be connected with voltage follower circuit, the 5V ac voltage signal that receiving cable selects circuit to provide is provided, obtain the digital value of voltage signal through the A/D change-over circuit, and be connected with the single-chip minimum system circuit by data bus, the single-chip minimum system circuit reads detected value from the A/D change-over circuit;
One serial ports debug circuit is used to provide the RS232 communication serial port;
One linear power supply circuit is used to each module for power supply of electric current and voltage check-out console.
In order to realize above-mentioned purpose of the present invention, another aspect of the present invention provides a kind of traffic signal control method for diagnosing faults, and step is as follows:
Step 1: system brings into operation, and fault detection board and electric current and voltage check-out console carry out initialization respectively, and fault detection board sends query messages to each piece electric current and voltage check-out console; The electric current and voltage check-out console receives the query messages of fault detection board;
Step 2: fault detection board receives the message of each piece electric current and voltage check-out console success of inquiry, and each piece electric current and voltage check-out console of reception begins to carry out the message that electric current and voltage detects, the electric current and voltage check-out console message that fault detection board is received is handled, and the electric current and voltage check-out console sends the voltage and current detected value;
Step 3: the message of the electric current and voltage check-out console detected value that fault detection board is sent receives processing, carries out fault diagnosis, and finishing fault diagnosis with fault detection board is end mark.
Also comprise according to the described step 1 of embodiments of the invention:
Step 11: fault detection board is finished initialization;
Step 12: inquiry electric current and voltage check-out console quantity sends query messages, execution in step 15 to each piece electric current and voltage check-out console;
Step 13: after the response message of receiving the electric current and voltage check-out console, carry out successful inquiring whether judgement, confirm to communicate by letter normally with each piece electric current and voltage check-out console, and each piece electric current and voltage check-out console initialization finishes, if judge successfully, enter step 2,, then continue execution in step 12 if judgement is unsuccessful;
Step 14: after the electric current and voltage check-out console is finished initialization, wait for the query messages that receives fault detection board;
Step 15: after receiving the query messages of step 12 fault detection board, reply the query messages of fault detection board, send the circumstance of initialization of electric current and voltage check-out console to fault detection board;
Step 16: the judgement to whether each piece electric current and voltage check-out console begins to detect, if judgement begins to detect, enter step 2, if judgement does not begin to detect, then execution in step 14.
Also comprise according to the described step 2 of the embodiment of the invention:
Step 21: fault detection board is judged the inquiry sign;
Step 22: if this is masked as 1, then send query messages,, then do not send query messages, execution in step 23 to the electric current and voltage check-out console if this is masked as 0 to the electric current and voltage check-out console;
Step 23: wait for to receive the message that the electric current and voltage check-out console is replied, receive that the message to the electric current and voltage check-out console receives processing after the message, execution in step 3 after finishing;
Step 24: the electric current and voltage check-out console that enters step 2 exchanges the voltage of exporting to 1-42 road controller successively and detects;
Step 25: and the electric current 25 of 1-14 controller interchange output channel detects;
Step 26: judge whether to receive the query messages of fault detection board, if receive the query messages of fault detection board, then execution in step 27, if do not receive the query messages of fault detection board, then execution in step 24,
Step 27: to fault detection board return voltage current detection value, begin new primary voltage current detecting then, execution in step 24 so repeatedly.
Also comprise according to the described step 3 of the embodiment of the invention:
Step 31: receive the message of the electric current and voltage check-out console of handling, fault detection board is handled the master control borad message sink of controller;
Step 32: the query messages that the master control borad of controller sends is resolved, and fault detection board is carried out fault diagnosis with reception processes voltage current detection value and predefined type of error and conflict rule to controller;
Step 33: the controller failure diagnostic result is judged if controller has fault, then execution in step 34, if controller does not have fault, then execution in step 2; According to what obtain in the step 2,, then return step 2 and carry out new primary voltage electric current inquiry if non-fault takes place;
Step 34: if the fault detection board diagnosing controller has fault to take place, then light the pilot lamp of fault detection board front panel correspondence, and preserve fault log in the storer of fault detection board, master control borad to controller sends message simultaneously, the type and the time of origin of the master control borad fault of notification controller are finished and are returned step 2 after the above operation and carry out new primary voltage electric current inquiry.
Technique effect of the present invention:
The present invention has adopted the fault diagnosis system that is independent of outside the controller, it comprises a fault detection board and polylith electric current and voltage check-out console, can the real time detection signal controller all exchange the voltage and current state of output, and carry out fault diagnosis according to predefined rule, when generation is unusual, report to the police to the signal controller master control borad, and on the front panel of fault detection board, show fault type, when catastrophic failure takes place, can provide the AC relay output signal, be used for the control signal lamp and be outputted to yellow sudden strain of a muscle state.The traffic signal control and the fault detection module that have remedied prior art become one, the easy operational failure of signal controller, and fault detection capability also lost efficacy easily, and the deficiency of the detection of green collision failure is only arranged.The present invention is used for the output voltage of traffic signal control and electric current are detected, can monitor in real time and fault analysis the running status of signal controller, and carry out fault diagnosis in view of the above, and guarantee the safe operation of traffic signal control, reach the effect of fault detection and diagnosis.
Description of drawings
Fig. 1 is the fault detection system example structure synoptic diagram of traffic signal control of the present invention
Fig. 2 is electric current and voltage check-out console example structure figure of the present invention
Fig. 3 A, Fig. 3 B, Fig. 3 C, Fig. 3 D, Fig. 3 E are electric current and voltage check-out console embodiment circuit diagrams of the present invention
Fig. 4 is fault detection board example structure figure of the present invention
Fig. 5 A, Fig. 5 B, Fig. 5 C, Fig. 5 D, Fig. 5 E, Fig. 5 F are fault detection board embodiment circuit diagrams of the present invention
Fig. 6 is the fault detection method workflow diagram of traffic signal control of the present invention
Embodiment
Below in conjunction with accompanying drawing fault diagnosis system of the present invention and method are described in further detail, be to be noted that described embodiment only is intended to be convenient to the understanding of the present invention, and it is not played any qualification effect.
Fig. 1 is the structural representation of fault diagnostic system, comprises a fault detection board 4, polylith electric current and voltage check-out console 2, and the quantity of electric current and voltage check-out console 2 is by the signal lamp output way decision of traffic signal control.Electric current and voltage check-out console 2 is output as input with the interchange of signal controller 1, polylith electric current and voltage check-out console 2, be connected with the AC signal output terminal of controller 1, be used for the voltage of every road AC signal of controller 1 and the electric current of each passage AC signal are detected in real time, and preserve detected value in the internal memory of electric current and voltage check-out console 2; Fault detection board 4 is connected with the master control borad 5 of signal controller by synchronous serial bus, receives query messages, sends fault alarm message.Fault detection board 4 is connected with polylith electric current and voltage check-out console 2 by universal serial bus 3, universal serial bus 3 is used to make the electric current and voltage check-out console to receive the query messages of fault detection board, and the voltage and current detected value of electric current and voltage check-out console is sent to fault detection board according to set form as message; Every electric current and voltage check-out console 2 is given an address, behind the query messages that receives fault detection board 4, sends the electric current and voltage detected value to fault detection board 4.Fault detection board 4 is carried out fault diagnosis according to electric current and voltage detection information, when generation is unusual, pilot lamp by front panel shows corresponding fault type, and report to the police to the master control borad 5 of controller, when catastrophic failures such as the green conflict of generation, the AC relay output signal is provided, the signal lamp of controller 1 is outputted to yellow sudden strain of a muscle state, realize degraded running.The master control borad 5 of controller is used to receive the voltage and current detected value of fault status information, and preserves fault log.1 all ac output ends outputs of described controller are voltage signal and current signals of every road signal lamp of exporting simultaneously, and the electric current and voltage check-out console detects is the current signal of the signal lamp group of the voltage signal of every road signal lamp and red, yellow, green three signal lamps composition; When fault detection board 4 inquiry electric current and voltage check-out consoles 2, send the voltage and current detected value data that detection obtains to fault detection board 4 by electric current and voltage check-out console 2.
Fig. 2 is the structured flowchart of electric current and voltage check-out console 2, and it is made up of single-chip minimum system circuit 21, voltage detecting circuit 22, current detection circuit 23, channel selection circuit 24, voltage follower circuit 25, A/D change-over circuit 26, AccessPort circuit 27, linear power supply circuit 28.Described electric current and voltage check-out console 2 connects the interchange output 4 of traffic signal control, detects the voltage of every road output, detects the electric current of each lamp group (red, yellow, green is a lamp group); Voltage, electric current are divided into and have or not two states, are stored in the internal memory of electric current and voltage check-out console, when fault detection board is inquired about, send to fault detection board.
The voltage detecting value of described electric current and voltage check-out console 2 outputs is by resistor network the alternating current 220V voltage signal to be reduced to exchange the 5V voltage signal, is converted into direct current signal by A/D change-over circuit 26 then, obtains the voltage detecting value.
The current detection value of described electric current and voltage check-out console 2 outputs is by D.C mutual-inductor the alternating current 220V current signal to be converted into to exchange the 5V voltage signal, is converted into direct current signal by A/D change-over circuit 26 then, obtains current detection value.
Wherein electric current and voltage check-out console 2 comprises:
Single-chip minimum system circuit 21 is connected with AccessPort circuit 27 with A/D change-over circuit 26 respectively, and single-chip minimum system circuit 21 is used to receive the detection data of the 5V ac voltage signal of A/D change-over circuit 26; Voltage detecting circuit 22 and current detection circuit 23 detect the voltage and current that exchanges output of controller 1 respectively by 96 needle interfaces, are translated into the 5V ac voltage signal; Channel selection circuit 24 is connected with voltage follower circuit 25 with channel selection circuit 24, and the interchange output channel of controller 1 is selected, and realizes the detection one by one of each passage; Voltage follower circuit 25 is connected with A/D change-over circuit 26 with channel selection circuit 24 respectively, is used for the 5V ac voltage signal output with channel selection circuit 24; A/D change-over circuit 26, be connected with voltage follower circuit 25, the 5V ac voltage signal that receiving cable selects circuit 24 to provide is provided, obtain the digital value of voltage signal through A/D change-over circuit 26, and be connected with single-chip minimum system circuit 21 by data bus, single-chip minimum system circuit 21 reads detected value from A/D change-over circuit 26; AccessPort circuit 27 is used to provide the RS232 communication serial port; Linear power supply circuit 28 is used to electric current and voltage check-out console 2 each module for power supply.
As Fig. 3 A, Fig. 3 B, Fig. 3 C, Fig. 3 D, Fig. 3 E the circuit diagram of electric current and voltage check-out console 2 is shown, wherein:
Single-chip minimum system circuit 21 is the control CPU of circuit board, selects the PIC18F6520 chip for use;
The output of channel selection circuit 24 is connected to A/D change-over circuit 26 through voltage follower circuit 25, realizes current detecting; 42 road voltage detection signals and 14 road current detection signals obtain 8 road voltage signals and are connected to the A/D conversion chip through 8 CD4051 channel selection circuits 24; Select for use the LM258 comparer to realize voltage follower circuit 25; The A/D conversion chip is selected TLC2543 for use;
Linear power supply circuit 28 for the electric current and voltage check-out console provide+5V and-the 5V power supply, adopt two 12V, the power transformer of 6VA, out secondary series connection back connects rectifier bridge, the output of rectifier bridge connects 7805 and 7905 three-terminal voltage-stabilizing chips respectively, acquisition+5V and-the 5V supply voltage.Continual detection 42 road voltage signals input of electric current and voltage check-out console and the input of 14 road current signals, and in internal memory record detection information, detection next time information covers the information that detected last time, when fault detection board 4 inquiries, the one-time detection information data of finishing recently is packaged into message sends to fault detection board 4.
Fig. 4 is the structured flowchart of fault check-out console 4, and fault detection board comprises: single-chip minimum system circuit 401, real time clock circuit 402, serial port circuit 403, address decoding circuitry 404, pilot lamp control circuit 405, data key circuit 406 ,+12VDC/+24VDC testing circuit 407, communication expanded circuit 408, Differencing communication change-over circuit 409, voltage detecting circuit 410, linear power supply circuit 411 and control relay circuit 412.Wherein, described fault detection board 4 is monitored the running status of controller 1 according to the voltage and current detected value and the predefined rule of 2 outputs of electric current and voltage check-out console; When abnormal conditions took place, fault detection board 4 sent fault status information to the master control borad 5 of controller, and shows the fault particular type by the front panel pilot lamp of fault detection board 4; When catastrophic failure took place, fault detection board 4 was used to control the output of controller 1 for controller 1 provides an AC relay output signal, with the yellow sudden strain of a muscle state of being outputted to of controller 1.
Fig. 5 A, Fig. 5 B, Fig. 5 C, Fig. 5 D, Fig. 5 E, Fig. 5 F are embodiment of the invention fault detection board 4 circuit diagrams,
Described fault detection board 4 comprises:
Single-chip minimum system circuit 401 is connected with real time clock circuit 402 by data address bus, is used for being provided with and the time for reading value; Single-chip minimum system circuit 401 is connected with address decoding circuitry 404, is used to provide three address decode signals to address decoding circuitry 404; Serial port circuit 403 has a RS232 interface and is connected with single-chip minimum system circuit 401; Address decoding circuitry 404 is connected with real time clock circuit 402, communication expanded circuit 408 respectively, and the address signal that provides of real time clock circuit 402, communication expanded circuit 408 is provided; One group of pilot lamp control circuit 405 is connected with fault detection board 4, is used for the pilot lamp of control fault check-out console 4 front panels; Single-chip minimum system circuit 401 is connected with pilot lamp control circuit 405, is used to provide the data-signal and the clock signal of each pilot lamp control circuit 405; Data key circuit 406 is connected with single-chip minimum system circuit 401 by the MICROWIRE data-interface, is used for the storage failure judgment rule; + 12VDC and+24VDC testing circuit 407, with single-chip minimum system circuit 401+12VDC and+the 24VDC direct supply is connected, be used to detect+electric power thus supplied of 12VDC and+24VDC direct supply; Communication expanded circuit 408 is used to expand the synchronous serial interface that fault detection board 4 is communicated by letter with electric current and voltage check-out console 2, and communication expanded circuit 408 is connected with single-chip minimum system circuit 401; Differencing communication change-over circuit 409 is connected with outside 64 pin mouths with communication expanded circuit 408 respectively, is used for the synchronous serial communication signal is converted into differential signal; Voltage detecting circuit 410 is connected with outside 64 pin mouths with single-chip minimum system circuit 401 respectively, is used to detect the Alternating Current Power Supply voltage of signals of controller 1; Linear power supply circuit 411 is used to provide the power supply of fault detection board 4 all modules; Control relay circuit 412 is connected with outside 64 pin mouths with single-chip minimum system circuit 401 respectively, is used to controller 1 that an AC relay output signal is provided.
Wherein single-chip minimum system circuit 401 adopts the PIC18F6520 single-chip microcomputer; Real time clock circuit 402 adopts DS 12C887 chip, and the time value power down is not lost; Serial port circuit 403 provides two communication serial ports, and one is used for communicating by letter with electric current and voltage check-out console 2, and another is used for debugging; Address decoding circuitry 404 is used to provide the chip selection signal of each functional chip; Pilot lamp control circuit 405 is used to control the LED light of front panel, is used to show malfunction; Data key circuit 406 adopts the DK4210 data key of DATAKEY company, is used to store green conflict rule; + 12VDC/+24VDC testing circuit 407 be used for detection+24V and+12V voltage, voltage is lower than+18V and+9V, the duration reaches 500 milliseconds, then be+24V and+12V failure of removal; Communication expanded circuit 408 adopts the Z85C30 chip of Zilog company, is used to provide a synchronous serial interface, communicates by letter with the master control borad 5 of signal controller; Differencing communication change-over circuit 409 adopts the MC34050 chip, and each signal of communication is carried out difference; Alternating current 220V signals such as 410 pairs of AC power supplies of voltage detecting circuit, fan, solid-state relay detect, and adopt the TLC2543 chip, are digital signal with analog signal conversion; Linear power supply circuit 411 adopts two 12V AC transformer, and 2 tunnel+5VDC is provided power supply, is the circuit board power supply; Control relay circuit 412 is by the input end of the IO mouth control photoelectric isolated chip HCPL2232 of single-chip microcomputer, and output terminal connects the control end of S8050 triode, and the output terminal of triode connects AC relay, produces relay control signal output.
Fig. 6 is a signal controller fault diagnosis system workflow diagram, and concrete implementation step is as follows:
Step 1: system brings into operation, and fault detection board 4 and electric current and voltage check-out console 2 carry out initialization respectively; Subsequently: after fault detection board 4 is finished initialization, the quantity of inquiry electric current and voltage check-out console 2, promptly send query messages to each piece electric current and voltage check-out console 2, confirm to communicate by letter normally with each piece electric current and voltage check-out console 2, and each piece electric current and voltage check-out console 2 initialization finishes, after receiving each piece electric current and voltage check-out console 2 response message, enter step 2;
After electric current and voltage check-out console 2 is finished initialization, wait for the query messages that receives fault detection board 4, after receiving message, reply that the circumstance of initialization to fault detection board 4 transmission electric current and voltage check-out consoles 2 enters step 2;
Step 2: this step is from the message of fault detection board 4 each piece electric current and voltage check-out console 2 success of inquiry, and each piece electric current and voltage check-out console 2 of reception begins to carry out the message that electric current and voltage detects, receive that to fault detection board 4 electric current and voltage check-out console 2 message handle, the electric current and voltage check-out console sends the voltage and current detected value to be finished:
4 pairs of fault detection board inquiry sign is judged, if this is masked as 1, then sends query messages to electric current and voltage check-out console 2, waits for then receiving the message that electric current and voltage check-out console 2 is replied, and message is received processing after receiving message, enters step 3 after finishing;
The electric current and voltage check-out console 2 that enters step 2 exchanges the voltage of output successively to 1-42 road controller 1, and the electric current of 1-14 controller 1 interchange output channel detects, behind the query messages of receiving fault detection board 4, to fault detection board 4 return voltage current detection values, begin new primary voltage current detecting then, so repeatedly;
Step 3: this step is finished electric current and voltage check-out console 2 message sinks with fault detection board 4 and is treated to beginning, and finishing fault diagnosis with fault detection board 4 is end mark;
The fault detection board 4 that enters step 3 is at first carried out the master control borad 5 message sinks processing of controller, the query messages that master control borad 5 sends is resolved, carry out fault diagnosis then, carry out fault judgement according to receive handling the electric current and voltage detected value that obtains and predefined type of error and conflict rule in the step 2, if non-fault takes place, then return step 2 and carry out new primary voltage electric current inquiry;
If fault detection board 4 diagnostic signal controllers have fault to take place, then light the pilot lamp of fault detection board 4 front panel correspondences, and preserve fault log in the storer of fault detection board 4, master control borad 5 to controller sends message simultaneously, the type and the time of origin of notice master control borad 5 faults are finished and are returned step 2 after the above operation and carry out new primary voltage electric current inquiry.
Described step 1 also comprises:
Step 11: fault detection board 4 is finished initialization;
Step 12: inquiry electric current and voltage check-out console 2 quantity send query messages, execution in step 15 to each piece electric current and voltage check-out console 2;
Step 13: after the response message of receiving electric current and voltage check-out console 2, carry out successful inquiring whether judgement, confirm to communicate by letter normally with each piece electric current and voltage check-out console 2, and each piece electric current and voltage check-out console 2 initialization finishes, if judge successfully, enter step 2,, then continue execution in step 12 if judgement is unsuccessful;
Step 14: after electric current and voltage check-out console 2 is finished initialization, wait for the query messages that receives fault detection board 4;
Step 15: after receiving the query messages of step 12 fault detection board 4, reply the query messages of fault detection board 4, send the circumstance of initialization of electric current and voltage check-out console 2 to fault detection board 4;
Step 16: the judgement to whether each piece electric current and voltage check-out console 2 begins to detect, if judgement begins to detect, enter step 2, if judgement does not begin to detect, then execution in step 14.
Described step 2 comprises that also from each piece electric current and voltage check-out console 2 success of fault detection board 4 inquiries, each piece electric current and voltage check-out console 2 begins to carry out electric current and voltage and detects beginning, receives that to fault detection board 4 detected value that electric current and voltage check-out console 2 sends finishes:
Step 21: 4 pairs of inquiry signs of fault detection board are judged;
Step 22: if this is masked as 1, then send query messages,, then do not send query messages, execution in step 23 to electric current and voltage check-out console 2 if this is masked as 0 to electric current and voltage check-out console 2;
Step 23: wait for to receive the message that electric current and voltage check-out console 2 is replied, receive that the message to electric current and voltage check-out console 2 receives processing after the message, execution in step 3 after finishing;
Step 24: the electric current and voltage check-out console 2 that enters step 2 detects the voltage that 1-42 road controller 1 exchanges output successively;
Step 25: and the electric current 25 of 1-14 controller 1 interchange output channel detects;
Step 26: judge whether to receive the query messages of fault detection board 4, if receive the query messages of fault detection board 4, then execution in step 27, if do not receive the query messages of fault detection board 4, then execution in step 24,
Step 27: to fault detection board 4 return voltage current detection values, begin new primary voltage current detecting then, execution in step 24 so repeatedly.
Described step 3 also comprises:
Step 31: receive the message of the electric current and voltage check-out console of handling 2, master control borad 5 message sinks of 4 pairs of controllers of fault detection board are handled;
Step 32: the query messages that the master control borad 5 of controller sends is resolved, and fault detection board 4 usefulness reception processes voltage current detection value and predefined type of error and conflict rule are carried out fault diagnosis to controller 1;
Step 33: controller 1 fault diagnosis result is judged if controller 1 has fault, then execution in step 34, if controller 1 does not have fault, then execution in step 2; According to what obtain in the step 2,, then return step 2 and carry out new primary voltage electric current inquiry if non-fault takes place;
Step 34: if fault detection board 4 diagnosing controllers 1 have fault to take place, then light the pilot lamp of fault detection board 4 front panel correspondences, and preserve fault log in the storer of fault detection board 4, master control borad 5 to controller sends message simultaneously, the type and the time of origin of master control borad 5 faults of notification controller are finished and are returned step 2 after the above operation and carry out new primary voltage electric current inquiry.
The above; only be the embodiment among the present invention; but protection scope of the present invention is not limited thereto; anyly be familiar with the people of this technology in the disclosed technical scope of the present invention; can understand conversion or the replacement expected; all should be encompassed in of the present invention comprising within the scope, therefore, protection scope of the present invention should be as the criterion with the protection domain of claims.
Claims (11)
1. the fault detection system of a traffic signal control is characterized in that, comprising:
One controller has the AC signal output terminal;
Polylith electric current and voltage check-out console is connected with the AC signal output terminal of controller, is used for the voltage of every road AC signal of controller and the electric current of each passage AC signal are detected in real time, and preserves detected value in the internal memory of electric current and voltage check-out console;
One universal serial bus, between electric current and voltage check-out console and fault detection board, be used to make the electric current and voltage check-out console to receive the query messages of fault detection board, and the voltage and current detected value of electric current and voltage check-out console is sent to fault detection board according to set form as message;
One fault detection board and is connected by null modem cable between the master control borad of controller, after being used for fault detection board and diagnosing the fault of controller, sends the voltage and current detected value of fault status information to the master control borad of controller; Described fault detection board has a control relay circuit, described control relay circuit is connected with outside 64 pin mouths with the single-chip minimum system circuit respectively, be used to controller that an AC relay output signal is provided, when catastrophic failure takes place when with the yellow sudden strain of a muscle state of being outputted to of controller;
The master control borad of one controller is used to receive the voltage and current detected value of fault status information, and preserves fault log.
2. according to the fault detection system of the described traffic signal control of claim 1, it is characterized in that, the voltage detecting value of described electric current and voltage check-out console output, be by resistor network the alternating current 220V voltage signal to be reduced to exchange the 5V voltage signal, be converted into direct current signal by the A/D change-over circuit then, obtain the voltage detecting value.
3. according to the fault detection system of the described traffic signal control of claim 1, it is characterized in that, the current detection value of described electric current and voltage check-out console output, be by D.C mutual-inductor the alternating current 220V current signal to be converted into to exchange the 5V voltage signal, be converted into direct current signal by the A/D change-over circuit then, obtain current detection value.
4. according to the fault detection system of the described traffic signal control of claim 1, it is characterized in that, described fault detection board is monitored the running status of controller according to the voltage and current detected value and the predefined rule of the output of electric current and voltage check-out console; When abnormal conditions took place, fault detection board sent fault status information to the controller master control borad, and showed the fault particular type by the front panel pilot lamp of fault detection board; When catastrophic failure took place, fault detection board was used to control the output of controller for controller provides an AC relay output signal, with the yellow sudden strain of a muscle state of being outputted to of controller.
5. according to the fault detection system of the described traffic signal control of claim 1, it is characterized in that, the output of all ac output ends of described controller is the voltage signal and the current signal of every road signal lamp of exporting simultaneously, and the electric current and voltage check-out console detects is the current signal of the signal lamp group of the voltage signal of every road signal lamp and red, yellow, green three signal lamps composition; When fault detection board inquiry electric current and voltage check-out console, send the voltage and current detected value data that detection obtains to fault detection board by the electric current and voltage check-out console.
6. according to the fault detection system of the described traffic signal control of claim 1, it is characterized in that described fault detection board comprises:
One single-chip minimum system circuit is connected with real time clock circuit by data address bus, is used for being provided with and the time for reading value; The single-chip minimum system circuit is connected with address decoding circuitry, is used to provide three address decode signals to address decoding circuitry;
One serial ports circuit has a RS232 interface and is connected with the single-chip minimum system circuit;
One address decoding circuitry is connected with real time clock circuit, communication expanded circuit respectively, and the address signal that provides of real time clock circuit, communication expanded circuit is provided;
One group of pilot lamp control circuit is connected with fault detection board, is used for the pilot lamp of control fault check-out console front panel; The single-chip minimum system circuit is connected with the pilot lamp control circuit, is used to provide the data-signal and the clock signal of each pilot lamp control circuit;
One data key circuit is connected with the single-chip minimum system circuit by the MICROWIRE data-interface, is used for the storage failure judgment rule;
+ 12VDC and+the 24VDC testing circuit, with the single-chip minimum system circuit+12VDC and+the 24VDC direct supply is connected, be used to detect+electric power thus supplied of 12VDC and+24VDC direct supply;
One communication expanded circuit is used to expand the synchronous serial interface that fault detection board is communicated by letter with the electric current and voltage check-out console, and the communication expanded circuit is connected with the single-chip minimum system circuit;
One Differencing communication change-over circuit is connected with outside 64 pin mouths with the communication expanded circuit respectively, is used for the synchronous serial communication signal is converted into differential signal;
One voltage detecting circuit is connected with outside 64 pin mouths with the single-chip minimum system circuit respectively, is used to detect the Alternating Current Power Supply voltage of signals of controller;
One linear power supply circuit is used to provide the power supply of all modules of fault detection board;
One control relay circuit is connected with outside 64 pin mouths with the single-chip minimum system circuit respectively, is used to controller that an AC relay output signal is provided.
7. according to the fault detection system of the described traffic signal control of claim 1, it is characterized in that described electric current and voltage check-out console comprises:
One single-chip minimum system circuit is connected with the AccessPort circuit with the A/D change-over circuit respectively, and the single-chip minimum system circuit is used to receive the detection data of the 5V ac voltage signal of A/D change-over circuit;
One voltage detecting circuit and current detection circuit detect the voltage and current that exchanges output of controller respectively by 96 needle interfaces, are translated into the 5V ac voltage signal;
One channel selection circuit is connected with voltage follower circuit with channel selection circuit, and the interchange output channel of controller is selected, and realizes the detection one by one of each passage;
One voltage follower circuit is connected with the A/D change-over circuit with channel selection circuit respectively, is used for the 5V ac voltage signal output with channel selection circuit;
One A/D change-over circuit, be connected with voltage follower circuit, the 5V ac voltage signal that receiving cable selects circuit to provide is provided, be converted to the digital value of voltage signal through A/D, and be connected with the single-chip minimum system circuit by data bus, the single-chip minimum system circuit reads detected value from the A/D change-over circuit;
One serial ports debug circuit is used to provide the RS232 communication serial port;
One linear power supply circuit is used to each module for power supply of electric current and voltage check-out console.
8. traffic signal control method for diagnosing faults, it is characterized in that: step is as follows:
Step 1: system brings into operation, and fault detection board and electric current and voltage check-out console carry out initialization respectively, and fault detection board sends query messages to each piece electric current and voltage check-out console; The electric current and voltage check-out console receives the query messages of fault detection board;
Step 2: fault detection board receives the message of each piece electric current and voltage check-out console success of inquiry, and each piece electric current and voltage check-out console of reception begins to carry out the message that electric current and voltage detects, the electric current and voltage check-out console message that fault detection board is received is handled the voltage and current detected value that the electric current and voltage check-out console sends;
Step 3: the message of the electric current and voltage check-out console detected value that fault detection board is sent receives processing, carry out fault diagnosis, when catastrophic failure takes place when, described fault detection board provides an AC relay output signal for described controller, be used to control the output of controller, with the yellow sudden strain of a muscle state of being outputted to of controller, finishing fault diagnosis with fault detection board is end mark.
9. described according to Claim 8 traffic signal control method for diagnosing faults, it is characterized in that: described step 1 also comprises:
Step 11: fault detection board is finished initialization;
Step 12: inquiry electric current and voltage check-out console quantity sends query messages, execution in step 15 to each piece electric current and voltage check-out console;
Step 13: after the response message of receiving the electric current and voltage check-out console, carry out successful inquiring whether judgement, confirm to communicate by letter normally with each piece electric current and voltage check-out console, and each piece electric current and voltage check-out console initialization finishes, if judge successfully, enter step 2,, then continue execution in step 12 if judgement is unsuccessful;
Step 14: after the electric current and voltage check-out console is finished initialization, wait for the query messages that receives fault detection board;
Step 15: after receiving the query messages of step 12 fault detection board, reply the query messages of fault detection board, send the circumstance of initialization of electric current and voltage check-out console to fault detection board;
Step 16: the judgement to whether each piece electric current and voltage check-out console begins to detect, if judgement begins to detect, enter step 2, if judgement does not begin to detect, then execution in step 14.
10. described according to Claim 8 traffic signal control method for diagnosing faults, it is characterized in that: described step 2 also comprises:
Step 21: fault detection board is judged the inquiry sign;
Step 22: if this is masked as 1, then send query messages,, then do not send query messages, execution in step 23 to the electric current and voltage check-out console if this is masked as 0 to the electric current and voltage check-out console;
Step 23: wait for to receive the message that the electric current and voltage check-out console is replied, receive that the message to the electric current and voltage check-out console receives processing after the message, execution in step 3 after finishing;
Step 24: the electric current and voltage check-out console that enters step 2 exchanges the voltage of exporting to 1-42 road controller successively and detects;
Step 25: and the electric current 25 of 1-14 controller interchange output channel detects;
Step 26: judge whether to receive the query messages of fault detection board, if receive the query messages of fault detection board, then execution in step 27, if do not receive the query messages of fault detection board, then execution in step 24,
Step 27: to fault detection board return voltage current detection value, begin new primary voltage current detecting then, execution in step 24 so repeatedly.
11. described according to Claim 8 traffic signal control method for diagnosing faults is characterized in that: described step 3 also comprises:
Step 31: receive the message of the electric current and voltage check-out console of handling, fault detection board is handled the master control borad message sink of controller;
Step 32: the query messages that the controller master control borad sends is resolved, and fault detection board is carried out fault diagnosis with receiving processes voltage current detection value and predefined type of error and conflict rule to controller;
Step 33: the controller failure diagnostic result is judged if controller has fault, then execution in step 34, if controller does not have fault, then execution in step 2; According to what obtain in the step 2,, then return step 2 and carry out new primary voltage electric current inquiry if non-fault takes place;
Step 34: if the fault detection board diagnosing controller has fault to take place, then light the pilot lamp of fault detection board front panel correspondence, and preserve fault log in the storer of fault detection board, master control borad to controller sends message simultaneously, the type and the time of origin of the master control borad fault of notification controller are finished and are returned step 2 after the above operation and carry out new primary voltage electric current inquiry.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN2008101027985A CN101546483B (en) | 2008-03-26 | 2008-03-26 | System and method for fault diagnosis of traffic signal controller |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN2008101027985A CN101546483B (en) | 2008-03-26 | 2008-03-26 | System and method for fault diagnosis of traffic signal controller |
Publications (2)
| Publication Number | Publication Date |
|---|---|
| CN101546483A CN101546483A (en) | 2009-09-30 |
| CN101546483B true CN101546483B (en) | 2010-12-08 |
Family
ID=41193597
Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| CN2008101027985A Expired - Fee Related CN101546483B (en) | 2008-03-26 | 2008-03-26 | System and method for fault diagnosis of traffic signal controller |
Country Status (1)
| Country | Link |
|---|---|
| CN (1) | CN101546483B (en) |
Families Citing this family (22)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN102509472A (en) * | 2011-11-03 | 2012-06-20 | 安徽科力信息产业有限责任公司 | Independent fault detection and processing circuit for intelligent traffic signal control machine |
| CN102622898A (en) * | 2012-04-10 | 2012-08-01 | 安徽科力信息产业有限责任公司 | Unique yellow-flash controller of signaler and signaler with same |
| CN102629419B (en) * | 2012-04-12 | 2014-06-25 | 中国计量学院 | Fault detection device for LED traffic lights |
| CN102890870B (en) * | 2012-10-30 | 2014-06-11 | 重庆交通大学 | Self diagnosis method and device for faults of traffic signal control machine |
| CN103021200A (en) * | 2012-12-28 | 2013-04-03 | 江苏科技大学 | Device and method for diagnosing fault of traffic signal lamp and controlling machine of traffic signal lamp |
| CN103971532B (en) * | 2013-02-04 | 2016-09-21 | 北京桓润世嘉科技有限公司 | Signal detection controls equipment and traffic signal fault automatic tour inspection system |
| CN103280117B (en) * | 2013-06-10 | 2015-04-08 | 西安费斯达自动化工程有限公司 | Intelligent fault data-logging and network alarm system of traffic lights |
| CN103559801B (en) * | 2013-11-14 | 2016-06-29 | 西安费斯达自动化工程有限公司 | Multi load is with driving countdown digital display signal lamp fault detection system |
| CN103914735B (en) * | 2014-04-17 | 2017-03-29 | 北京泰乐德信息技术有限公司 | A kind of fault recognition method and system based on Neural Network Self-learning |
| CN103996307A (en) * | 2014-05-11 | 2014-08-20 | 彭守斌 | Method for automatically monitoring operation of traffic signal lamps by crossing different signal controllers |
| CN105376900A (en) * | 2014-08-30 | 2016-03-02 | 姬志强 | Internal signal lamp monitoring circuit of high-speed train |
| CN105654740A (en) * | 2016-01-12 | 2016-06-08 | 中国科学院自动化研究所 | Finite-state machine-based traffic signal scheduling method and device |
| WO2018023110A1 (en) * | 2016-07-29 | 2018-02-01 | Hubbell Incorporated | Self-diagnostic fault identification system for emergency lighting unit |
| CN106652527B (en) * | 2017-02-10 | 2019-09-06 | 青岛海信网络科技股份有限公司 | A kind of method for diagnosing faults and system of traffic signal control |
| CN107369327A (en) * | 2017-09-01 | 2017-11-21 | 西安航空学院 | Intersection traffic whistle control system and method based on the buses of RS 485 |
| CN109933469A (en) * | 2017-12-15 | 2019-06-25 | 上海宝康电子控制工程有限公司 | For the automatic checkout equipment and method of hardware board in traffic signals equipment |
| CN110164149A (en) * | 2019-06-13 | 2019-08-23 | 中国科学院自动化研究所 | Traffic signal light control device and method based on direct current signal |
| CN110706499A (en) * | 2019-09-30 | 2020-01-17 | 潍坊畅讯交通设施工程有限公司 | Distributed traffic signal lamp fault detection device and control method |
| CN111477001A (en) * | 2020-03-04 | 2020-07-31 | 中国联合网络通信有限公司广州市分公司 | Traffic signal acquisition and management system based on 5G and MEC |
| CN113031563A (en) * | 2021-03-05 | 2021-06-25 | 展讯通信（上海）有限公司 | Fault detection system and method |
| CN113985177A (en) * | 2021-10-29 | 2022-01-28 | 江铃汽车股份有限公司 | Method and device for quickly diagnosing 48V system fault of hybrid electric vehicle |
| CN117434876B (en) * | 2023-12-19 | 2024-03-08 | 深圳市森威尔科技开发股份有限公司 | Open temperature control protocol communication detection circuit and device |
Citations (3)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| US5327123A (en) * | 1992-04-23 | 1994-07-05 | Traffic Sensor Corporation | Traffic control system failure monitoring |
| CN1581237A (en) * | 2004-05-18 | 2005-02-16 | 清华大学 | Vehicle-state monitoring and fault diagnosis apparatus |
| CN101017601A (en) * | 2006-12-08 | 2007-08-15 | 天津大学 | A system used for electric-controlled vehicle radio remote monitoring, marking and failure diagnosis |
-
2008
- 2008-03-26 CN CN2008101027985A patent/CN101546483B/en not_active Expired - Fee Related
Patent Citations (3)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| US5327123A (en) * | 1992-04-23 | 1994-07-05 | Traffic Sensor Corporation | Traffic control system failure monitoring |
| CN1581237A (en) * | 2004-05-18 | 2005-02-16 | 清华大学 | Vehicle-state monitoring and fault diagnosis apparatus |
| CN101017601A (en) * | 2006-12-08 | 2007-08-15 | 天津大学 | A system used for electric-controlled vehicle radio remote monitoring, marking and failure diagnosis |
Also Published As
| Publication number | Publication date |
|---|---|
| CN101546483A (en) | 2009-09-30 |
Similar Documents
| Publication | Publication Date | Title |
|---|---|---|
| CN101546483B (en) | System and method for fault diagnosis of traffic signal controller | |
| CN102890870B (en) | Self diagnosis method and device for faults of traffic signal control machine | |
| CN107143429B (en) | Electronic Unit Pump Diesel Engine ECU redundant system and design method | |
| CN101567130B (en) | Method and system for remote fault detection of traffic signal controller | |
| CN102900526B (en) | Diesel engine security protection control method and diesel engine security protection controller | |
| CN102013168A (en) | Phase combination fault detection method of traffic signal controller | |
| CN104503272A (en) | Automatic train driving system based on double-system hot standby redundancy | |
| CN108321769B (en) | A kind of electric machine control system failure protecting device and method based on CPLD and DSP | |
| CN109932975B (en) | Intelligent controller of permanent magnet magnetic suspension turnout | |
| CN110588412B (en) | Electric automobile modularization fills electric pile system | |
| CN102915033A (en) | Vehicle fault diagnosing system and engineering machine | |
| CN107356883A (en) | A kind of signal lamp failure detection means and method based on current effective value | |
| CN105151179A (en) | Fault diagnosing and repairing system for electric bicycle | |
| CN103903471A (en) | Operating state monitoring and fault warning device for traffic signal lamp | |
| CN209813737U (en) | Magnetic-levitation train and levitation control system and controller thereof | |
| CN108919781A (en) | The self checking method and realization circuit of EMU auto-passing neutral section control system | |
| CN200995700Y (en) | Filament-conversion alarming system of scheduling signal indicator | |
| CN107481541A (en) | A kind of signal lamp driver overlaps fault detection method | |
| CN104085424B (en) | Cab signal system security controls platform | |
| CN203012970U (en) | Traffic signal controller having function of intelligent fault diagnosis | |
| CN115123339A (en) | Coding unit for station ground control system | |
| CN201397458Y (en) | Extremely fast windmill monitoring device based on CAN bus | |
| CN107346004A (en) | A kind of signal lamp failure detection means based on voltage effective value | |
| CN202883116U (en) | Display module circuit of diesel engine safety protection controller | |
| CN207164226U (en) | A kind of signal lamp failure detection means based on current effective value |
Legal Events
| Date | Code | Title | Description |
|---|---|---|---|
| C06 | Publication | ||
| PB01 | Publication | ||
| C10 | Entry into substantive examination | ||
| SE01 | Entry into force of request for substantive examination | ||
| C14 | Grant of patent or utility model | ||
| GR01 | Patent grant | ||
| CF01 | Termination of patent right due to non-payment of annual fee |
Granted publication date: 20101208 Termination date: 20200326 |
|
| CF01 | Termination of patent right due to non-payment of annual fee |