CN1269678C - Locomotive signal failure diagnostic instrument - Google Patents
Locomotive signal failure diagnostic instrument Download PDFInfo
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- CN1269678C CN1269678C CN 200310100266 CN200310100266A CN1269678C CN 1269678 C CN1269678 C CN 1269678C CN 200310100266 CN200310100266 CN 200310100266 CN 200310100266 A CN200310100266 A CN 200310100266A CN 1269678 C CN1269678 C CN 1269678C
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- 230000003137 locomotive effect Effects 0.000 title abstract description 5
- 238000012360 testing method Methods 0.000 claims abstract description 88
- 239000000523 sample Substances 0.000 claims abstract description 19
- 239000013078 crystal Substances 0.000 claims abstract description 14
- 238000012544 monitoring process Methods 0.000 claims abstract description 13
- 230000011664 signaling Effects 0.000 claims description 38
- 238000000034 method Methods 0.000 claims description 13
- 230000008569 process Effects 0.000 claims description 10
- 230000007274 generation of a signal involved in cell-cell signaling Effects 0.000 claims description 5
- 230000001360 synchronised effect Effects 0.000 claims description 5
- 230000002093 peripheral effect Effects 0.000 claims description 3
- 230000005622 photoelectricity Effects 0.000 claims description 3
- 238000003745 diagnosis Methods 0.000 abstract description 7
- 230000008901 benefit Effects 0.000 abstract description 4
- 238000012545 processing Methods 0.000 abstract description 3
- 230000008878 coupling Effects 0.000 abstract 1
- 238000010168 coupling process Methods 0.000 abstract 1
- 238000005859 coupling reaction Methods 0.000 abstract 1
- 230000000007 visual effect Effects 0.000 abstract 1
- 238000001514 detection method Methods 0.000 description 13
- 230000006870 function Effects 0.000 description 8
- 238000010586 diagram Methods 0.000 description 6
- 230000004807 localization Effects 0.000 description 5
- 238000012423 maintenance Methods 0.000 description 5
- 238000005070 sampling Methods 0.000 description 5
- 238000002955 isolation Methods 0.000 description 4
- 238000013461 design Methods 0.000 description 3
- 230000007257 malfunction Effects 0.000 description 3
- 241001269238 Data Species 0.000 description 2
- 230000005856 abnormality Effects 0.000 description 2
- 238000006243 chemical reaction Methods 0.000 description 2
- 238000005516 engineering process Methods 0.000 description 2
- 238000007689 inspection Methods 0.000 description 2
- 238000009413 insulation Methods 0.000 description 2
- 230000010355 oscillation Effects 0.000 description 2
- 230000009897 systematic effect Effects 0.000 description 2
- 239000002699 waste material Substances 0.000 description 2
- 230000009471 action Effects 0.000 description 1
- 230000008859 change Effects 0.000 description 1
- 230000001066 destructive effect Effects 0.000 description 1
- 238000002405 diagnostic procedure Methods 0.000 description 1
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- 239000004973 liquid crystal related substance Substances 0.000 description 1
- 238000010998 test method Methods 0.000 description 1
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Abstract
The present invention relates to a failure diagnosis instrument for locomotive signals. A central processing unit (CPU) system is composed of a CPU, a memorizer, a reset circuit, a crystal oscillator circuit and a bus drive circuit. The failure diagnosis instrument for locomotive signals is formed by connecting the CPU system with the following modules: an asynchronous serial port module, a keyboard processing module, a dummy head circuit, an AD detecting module connected to an AD interface of a plate to be detected, a bus analog circuit, an isolative input module adopting a photoelectric coupling circuit, a crystal oscillator detecting module composed of a test controller, a data register and a frequency counter, a power supply monitoring module and a probe circuit, wherein the probe circuit is connected with a test probe. The failure diagnosis instrument for locomotive signals has the advantages of simple operation and visual test result. The plate to be detected is controlled to work by diagnosis instrument programs, so that a large quantity of comprehensive test data can be obtained quickly. When matched with a test table pen, the failure diagnosis instrument can further localize faults.
Description
Technical field
The present invention relates to a kind of failure diagnostic apparatus, be meant a kind of cab signaling equipment failure diagnostic apparatus especially.
Cab signaling equipment is a kind of railway signals equipment, is one of signalling set of locomotive indispensability.The function of cab signaling equipment is to receive, decipher the information that is used to command train operation, and provides it to the relevant device of driver and monitoring, control train operation, to ensure the safety and the efficient of train operation.Timely maintenance after the reliable operation of cab signaling equipment and the fault has important meaning.
" cab signaling equipment failure diagnostic apparatus " (hereinafter to be referred as diagnostic equipment) is domestic first instrument that is used for cab signaling equipment is carried out automatic fault diagnosis.It can carry out comprehensively detecting automatically to the cab signaling equipment circuit card, determine the working condition of each several part circuit, and guide the staff to pass through simple judgement and operation, the trouble point of locating circuit board, the use of diagnostic equipment, can improve the maintenance efficiency of cab signaling equipment greatly, reduce maintenance cost, ensure the normal utilization of cab signaling equipment, have very big social benefit and economic benefit.
Background technology
At present, in relevant application, the mode that can take did not have two kinds outside having in the past, and a kind of is to adopt general-duty circuit card online detection instrument (needle-bar test equipment), and another kind is complete manual detection.
The needle-bar test equipment has following shortcoming at the application of cab signal trouble diagnosing:
(1) costs an arm and a leg operation and maintenance cost height.
(2) correspondence requires height with personnel.Must design trace routine, design processing detection template by the professional, and the general user can't finish.
(3) testing result is represented not intuitively, do not have to detect instructs.
(4) limitation is arranged.The positioning devices fault more is difficult to detect to analogous circuit fully.
Manual detection has following shortcoming at the application of cab signal trouble diagnosing:
(1) testing staff is required height.The testing staff must extremely understand circuit, just might analyze and detect according to phenomenon of the failure.
(2) detection difficulty is big.For the circuit of real time execution, be difficult to measure the mode of operation of each several part, be difficult to carry out fault localization.
(3) inefficiency.Adopt manual method that circuit card is comprehensively detected and to expend a large amount of time, and be difficult to the mistake of avoiding artificial.
(4) maintenance cost height.Manual detection must trial property device change, cause waste unavoidably.
Summary of the invention
The objective of the invention is to avoid above-mentioned weak point of the prior art and a kind of cab signaling equipment failure diagnostic apparatus is provided.Utilize tested engine signalling set circuit card the CPU module interface and with the interface of external device, adopt the plate level embed, with the work of diagnostic equipment programming control tested engine signalling set circuit card, Board Under Test simulated-bus and isolation, input interface isolation and data acquisition, test probe application, function test and methods such as electric test combines, by rational testing process and detection step, realize trouble diagnosing to measured signal circuitry plate.
Purpose of the present invention can reach by following measure:
A kind of cab signaling equipment failure diagnostic apparatus,
Cpu system is made of central process unit, memory device, reset circuit, crystal oscillating circuit and bus driving circuits, and this cab signaling equipment failure diagnostic apparatus is made of with lower module the cpu system connection,
(1) asynchronous serial port: diagnostic equipment is connected with display equipment by asynchronous serial port;
(2) keyboard is handled: be connected with keyboard;
(3) artificial head circuit;
(4) AD detects: be made up of analog signal generation circuit and synchronous serial interface circuit, be connected to Board Under Test AD interface;
(5) simulated-bus circuit: cooperate peripheral circuit to realize simulated-bus by CPU.
(6) isolate input: for the photoelectricity coupled circuit of the output signal of gathering Board Under Test constitutes;
(7) crystal oscillator detects: be made up of unit of testing and controlling, data register, frequency counter;
(8) power supply monitoring.
The cpu system of this cab signaling equipment failure diagnostic apparatus is connected with probe circuit, and this probe circuit is connected with test probe.
The present invention has following advantage compared to existing technology:
(1) easy and simple to handle, use easily, good man-machine interaction interface (Liquid Crystal Display (LCD) or PC telltale) is arranged, testing result is directly perceived.
(2) commonality is good, and a diagnostic equipment can detect present on-the-spot 3 kinds of cab signaling equipment motherboards that use.
(3) test comprehensively.Because diagnostic equipment utilizes the CPU module interface of equipment under test circuit card and external apparatus interface is detected, work with diagnostic equipment programming control tested engine signalling set circuit card, therefore can obtain a large amount of comprehensively test datas rapidly, and testing process is not influenced by the original program design of Board Under Test.
(4) fault localization is accurate.By rational testing process and test procedure, can determine fault type and fault coverage fast; Under the diagnostic equipment systematic direction, cooperate the test test pencil, the further localization of faults.
(5) use of diagnostic equipment can realize accurately, efficient, and reduced unnecessary waste.
Description of drawings
Fig. 1. cab signaling equipment failure diagnostic apparatus schematic circuit diagram.
Fig. 2. cab signaling equipment failure diagnostic apparatus structured flowchart.
Fig. 3. cab signaling equipment failure diagnostic apparatus workflow diagram.
Fig. 4. cab signaling equipment failure diagnostic apparatus malfunction monitoring diagram of circuit.
The specific embodiment
This cab signaling equipment failure diagnostic apparatus is constructed as follows, and please refer to Fig. 1 cab signaling equipment failure diagnostic apparatus schematic circuit diagram, and cpu system is made of central process unit, memory device, reset circuit, crystal oscillating circuit and bus driving circuits etc.This partial circuit has constituted the basic environment of system works.This diagnostic equipment is made of with lower module the cpu system connection:
(1) asynchronous serial port: diagnostic equipment drives display equipment by Asynchronous Serial Interface.Display equipment is the instrument that diagnostic equipment is expressed various information, and content displayed comprises Diagnostics Interfaces, diagnosis algorithm, diagnostic result and information etc.
(2) keyboard is handled: the keyboard treatment circuit detects key-press status in real time, when button operation takes place, sends interruption to treater, submits keyboard-coding information simultaneously to.Keyboard is the interface that diagnostic equipment receives control command, and the user is by the diagnotic process of Keyboard Control.
(3) probe circuit: test probe is the accessory appliances of diagnostic equipment, utilizes it can survey the signal of each test point on the circuit-under-test plate.The function that probe circuit is realized has two: the one, the test point signal is delivered to the processor A D interface after isolating, and be converted to accurate magnitude of voltage by AD; The 2nd, utilize comparator circuit to judge that the test point level is high level, low level or not stationary state, and give treater the result.
(4) artificial head circuit: artificial head is the test fastening means of diagnostic equipment, and its connecting portion is the CPU module interface of Board Under Test, and the cpu system of Board Under Test is partly inserted diagnostic system.Cab signal has 3 kinds of circuit cards at present, its CPU module interface difference, and diagnostic equipment has designed different artificial heads for this reason.Diagnostic equipment can be discerned different artificial heads automatically, and in view of the above different Board Under Tests is adopted corresponding diagnostic program.
(5) AD detects: the AD electric circuit inspection is arranged on the cab signaling equipment circuit card, is the signal acquisition circuit that analog signal conversion is become digital signal.The function of AD electric circuit inspection is the detection that realizes Board Under Test AD circuit, and it is made of two parts: analog signal generation circuit and synchronous serial interface circuit.
Analog signal generation circuit can be exported the analog signal waveform of certain amplitude and form, delivers to the analog signal interface of Board Under Test AD circuit.
The synchronous serial interface circuit, the realization diagnostic equipment is communicated by letter with Board Under Test AD chip.Diagnostic equipment can be by serial interface to the AD of Board Under Test chip transmitting control commands, control its mode of operation, and then the sampled result of the AD chip that reads back, the output wave shape comparison with signal generating circuit detects sampling frequency, sampling precision and signal sending function.
(6) simulated-bus circuit: in diagnostic procedure, owing to insert the tested engine signal panel with artificial head, substitute the CPU module of tested engine signal panel, so diagnostic equipment must be able to provide all bus signal of tested engine signal panel, to drive the tested engine signal panel, this part work is realized by the simulated-bus circuit.CPU cooperation peripheral circuit simulates data bus, address bus and the control bus of tested engine signal panel, for the tested engine signal panel provides bus signals.Bus signals on the Board Under Test also can read back by the simulated-bus circuit, and by this closed loop, whether the bus that diagnostic equipment can detect the tested engine signal panel fault.And navigate to the bus of et out of order.
(7) isolate input: the output interface of cab signal is exported multiple switching value signal, comprises lamp position signal, speed class, standard, insulation joint information etc.Whether diagnostic equipment need read these signals, working properly to judge the Board Under Test output circuit.For fear of the work that influences Board Under Test, also in order to prevent the diagnostic equipment circuit, adopt the photoelectricity coupled circuit to gather the output signal of Board Under Test by accidental damage, realize the electrical isolation of diagnostic equipment circuit and Board Under Test output signal.
(8) crystal oscillator detects: realize the crystal oscillator measuring ability to Board Under Test, partly be made up of unit of testing and controlling, data register, frequency counter etc.Frequency counter is counted the output signal frequency of Board Under Test crystal oscillator, and count results is deposited in register.Test program reads the result by test control circuit control counting opportunity from data register, with theoretical value relatively, judge whether crystal oscillator working properly.
(9) power supply monitoring: comprise Board Under Test 48V input short circuit monitoring and Board Under Test+5V output monitoring and detection.
Power Supply Monitoring: the power supply of tested engine signal panel is controlled by voltage monitoring circuit.This circuit Board Under Test power supply input voltage and+5V operating voltage signal isolates sampling, judge through comparator circuit again, if find that input short circuit or operating voltage are too high, notification processor immediately then, with the power supply of timely shutoff, avoid damaging diagnostic equipment to Board Under Test.
Power supply detects: after tested engine signal panel+5V operating voltage dividing potential drop, deliver to the AD sample circuit of treater.Diagnostic equipment is calculated sampled result, and whether the amplitude of judgement voltage and ripple be in normal range.
During use, this cab signaling equipment failure diagnostic apparatus is connected with external equipment with Board Under Test, please refer to Fig. 2 cab signaling equipment failure diagnostic apparatus structured flowchart, and Board Under Test is connected with the diagnostic equipment system, starts diagnostic system, shows to detect the interface.Utilize keyboard to carry out the testing conditions setting, the project of setting comprises the project that circuit card information, needs detect etc.System detects automatically to Board Under Test, shows detection procedure.
Automatically detect by Fig. 3 cab signaling equipment failure diagnostic apparatus workflow diagram, show test results by Fig. 4 cab signaling equipment failure diagnostic apparatus malfunction monitoring diagram of circuit.
Testing process is as follows:
(1) diagnostic equipment sends data bus, address bus and control bus signal by the simulated-bus circuit to control circuit, the signal of the certain combination of output circuit output of control Board Under Test.
(2) diagnostic equipment is gathered these output signals by isolating input circuit, read back the actual value of output from data bus after, compare with theoretical value, judge whether output circuit correct.
(3) if find the delivery channel of fault, the channel number of system prompt fault.The user can test once more automatically by the keyboard operation diagnostic equipment, or enters the abnormality test flow process.
(4) enter abnormality test, according to the failure message that has obtained, diagnostic system is selected suitable detection scheme from the diagnostic message storehouse that stores, instruct the relevant test point of output circuit is tested.This process need test probe cooperates, and system compares the signal that test probe reads with theoretical value, judge whether measured signal point is normal.
(5) by the test to interlock circuit on the Board Under Test, diagnostic equipment can be judged the guilty culprit of Board Under Test, and shows concrete failure message.
Detection thes contents are as follows:
(1) Power Supply Monitoring and detection.Power Supply Monitoring can detect power supply input short circuit and+destructive malfunctions such as high pressure of 5V working power, and in time cut off the power supply of tested engine signal panel.Power supply detects the amplitude and the ripple that can detect Board Under Test+5V working power and whether is in normal range.
(2) crystal oscillator detects.Can detect the crystal oscillator starting of oscillation situation of tested engine signal panel and oscillation frequency by the crystal oscillator testing circuit.
(3) bus detects.Diagnostic equipment provides address bus by the simulated-bus circuit to the tested engine signal panel, data bus, and the control bus signal is controlled the work of tested engine signal panel.The simulated-bus circuit address bus that can read back, data bus, the data on the control bus are compared these feedback signals with the signal that is sent, and whether data bus, address bus and the control bus that just can detect the tested engine signal panel be normal.Bus detects the bus that can accurately locate et out of order.
(4) control circuit detects.The control circuit of cab signal is sent control signal, not only coordinates the work of each several part circuit, guarantees to finish various functions, and has realized the fail safe design of system.Diagnostic equipment sends address bus and control bus signal by the simulated-bus circuit to control circuit, and the service conditions of analog control circuit detects important control signal, judges the control circuit mode of operation, points out the device of fault.Cooperate the use of test probe, accurately the fault location point.
(5) memory device detects.Diagnostic equipment sends data bus, address bus and control bus signal by the simulated-bus circuit to control circuit, realizes the read-write operation sequential of memory device, and the chip external memory of cab signaling equipment circuit card is checked, judges whether fault.
(6) photoelectric switch detects.Diagnostic equipment sends data bus, address bus and control bus signal by the simulated-bus circuit to control circuit, realizes the service conditions of states such as photoelectric switch conducting, shutoff, the action of control photoelectric switch.Read the existing condition of photoelectric switch again by the isolation input circuit, judge whether it is working properly.
(7) the output reactive circuit detects: the output interface of cab signal is exported multiple switching value signal, comprises lamp position signal, speed class, standard, insulation joint information etc.In order to ensure safety, the backfeed loop that cab signal also passes through reads output signal and confirms.Diagnostic equipment sends data bus, address bus and control bus signal by the simulated-bus circuit to control circuit, the signal of the certain combination of control Board Under Test output.Diagnostic equipment is gathered these output signals by isolating input circuit on the one hand, compares with theoretical value, judges whether output is correct.Control Board Under Test on the other hand by the backfeed loop output signal that reads back, judge whether its backfeed loop is normal.If find the output feedback channel of fault, can detect by the use test probe, determine the device of fault.
(8) input circuit detects: have ready conditions on the cab signaling equipment circuit card wire jumper is set, the mode control cab signal of these wire jumpers is realized function corresponding.Diagnostic equipment sends data bus, address bus and control bus signal by the simulated-bus circuit to control circuit, and control Board Under Test reading conditions is provided with the state of wire jumper, and is presented on the telltale.The user can contrast the actual setting on the Board Under Test, checks whether input interface is normal.If find the passage of fault, can detect by the use test probe, determine the device of fault.
(9) analog signal interface detects: the AD circuit is arranged on the cab signaling equipment circuit card, is the signal acquisition circuit that analog signal conversion is become digital signal.Diagnostic equipment is exported the analog signal waveform of certain amplitude and form by analog signal generation circuit, delivers to the analog signal interface of Board Under Test AD circuit.Utilize synchronous serial interface again, the realization diagnostic equipment is communicated by letter with Board Under Test AD chip, controls its mode of operation, the readback signal sampled result, and the output wave shape comparison with signal generating circuit detects sampling frequency, sampling precision and signal sending function.
This cab signaling equipment failure diagnostic apparatus is easy and simple to handle, testing result is directly perceived, commonality is good, work with diagnostic equipment programming control Board Under Test, therefore can obtain a large amount of comprehensively test datas rapidly, fault localization is accurate, under the diagnostic equipment systematic direction, cooperate the test test pencil, the further localization of faults.
Claims (2)
1. cab signaling equipment failure diagnostic apparatus is characterized in that:
Cpu system is made of central process unit, memory device, reset circuit, crystal oscillating circuit and bus driving circuits, and this cab signaling equipment failure diagnostic apparatus is made of with lower module the cpu system connection,
(1) asynchronous serial port: diagnostic equipment is connected with display equipment by asynchronous serial port;
(2) keyboard is handled: be connected with keyboard;
(3) artificial head circuit;
(4) AD detects: be made up of analog signal generation circuit and synchronous serial interface circuit, be connected to Board Under Test AD interface;
(5) simulated-bus circuit: cooperate peripheral circuit to realize simulated-bus by described cpu system;
(6) isolate input: for the photoelectricity coupled circuit of the output signal of gathering Board Under Test constitutes;
(7) crystal oscillator detects: be made up of unit of testing and controlling, data register, frequency counter;
(8) power supply monitoring.
2. cab signaling equipment failure diagnostic apparatus as claimed in claim 1 is characterized in that:
The cpu system of this cab signaling equipment failure diagnostic apparatus is connected with probe circuit, and this probe circuit is connected with test probe.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN 200310100266 CN1269678C (en) | 2003-10-15 | 2003-10-15 | Locomotive signal failure diagnostic instrument |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN 200310100266 CN1269678C (en) | 2003-10-15 | 2003-10-15 | Locomotive signal failure diagnostic instrument |
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| CN1528630A CN1528630A (en) | 2004-09-15 |
| CN1269678C true CN1269678C (en) | 2006-08-16 |
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| Application Number | Title | Priority Date | Filing Date |
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| CN 200310100266 Expired - Fee Related CN1269678C (en) | 2003-10-15 | 2003-10-15 | Locomotive signal failure diagnostic instrument |
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Families Citing this family (9)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN102508065A (en) * | 2011-10-28 | 2012-06-20 | 中联重科股份有限公司 | Electrical fault diagnosis method and system and engineering machinery |
| CN102508064A (en) * | 2011-10-28 | 2012-06-20 | 中联重科股份有限公司 | Electrical equipment fault diagnosis method, equipment, system and engineering machinery |
| CN103336494B (en) * | 2013-06-05 | 2015-09-09 | 南车资阳机车有限公司 | Based on locomotive control and the implementation method of WinPac controller |
| CN103631189B (en) * | 2013-06-26 | 2016-08-17 | 中车青岛四方机车车辆股份有限公司 | rail vehicle logic control circuit diagnostic system and diagnostic method |
| CN104835218A (en) * | 2015-05-11 | 2015-08-12 | 上海航盛实业有限公司 | Rotational speed signal acquisition system of driving recorder |
| CN106645899A (en) * | 2016-12-29 | 2017-05-10 | 深圳前海弘稼科技有限公司 | Fault prompting method, fault prompting device, and implantation equipment |
| CN107276847A (en) * | 2017-06-12 | 2017-10-20 | 上海华岭集成电路技术股份有限公司 | A kind of method for automatically processing GPIB communication abnormalities |
| CN109406983A (en) * | 2017-08-16 | 2019-03-01 | 上海卓亚医疗科技有限公司 | A kind of clinac faulty circuit plate is disembarked analoging detecting device |
| CN108535536B (en) * | 2018-05-02 | 2023-08-25 | 湖南中车时代通信信号有限公司 | Train working condition voltage acquisition circuit and method for full-time self-detection |
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2003
- 2003-10-15 CN CN 200310100266 patent/CN1269678C/en not_active Expired - Fee Related
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Correction item: Patentee|Address|Patentee Correct: Beijing Jiaotong University|100044 Beijing city Haidian District Shangyuan Village No. 3|BEIJING JIAODA SIGNAL TECHNOLOGY CO., LTD. False: Beijing Jiaotong University|100044 Beijing city Haidian District Shangyuan Village No. 3 Number: 07 Volume: 32 |
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Inventor after: Ning Bin Inventor after: Qiu Kuanmin Inventor after: Zhang Min Inventor after: Wang Yonghe Inventor after: Zhao Shengkai Inventor after: Zhao Huibing Inventor before: Qiu Kuanmin Inventor before: Zhang Min Inventor before: Wang Yonghe Inventor before: Zhao Shengkai |
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