CN2831149Y - Fault auto analyzer for test circuit - Google Patents
Fault auto analyzer for test circuit Download PDFInfo
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- CN2831149Y CN2831149Y CN 200520101416 CN200520101416U CN2831149Y CN 2831149 Y CN2831149 Y CN 2831149Y CN 200520101416 CN200520101416 CN 200520101416 CN 200520101416 U CN200520101416 U CN 200520101416U CN 2831149 Y CN2831149 Y CN 2831149Y
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Abstract
The utility model relates to a fault automatic analyzer for a test circuit, which comprises a single chip computer circuit, a photoelectric coupling circuit connected with an output end of a single chip computer, a decoding matrix circuit connected with the output end of the photoelectric coupling circuit, a drive circuit connected with the output end of the decoding matrix circuit and a power supply circuit. The utility model is characterized in that the output end of the drive circuit is connected with a fault sampling circuit, one output end of which is connected with a bench circuit, the other output end of the fault sampling circuit is connected with a fault recognizing circuit and the output end of which is connected with the interrupt input end of the single chip computer. The utility model has the characteristics and the advantages of efficiency improvement, low cost, higher cost performance ratio and convenient maintenance; the teaching experiment can be normally proceed, and the utility model uses a low voltage and light current detection system of +24 volt and uses a relay to completely isolate strong current experiment lines and a light current diagnostic system to ensure the safety of the person and the diagnostic system.
Description
Technical field
The utility model relates to a kind of automatic circuit fault diagnosis device, particularly about the automatic diagnostic device of student experimenting fault.
Background technology
The line of present various relay one contact class experiment table all adopts the connector form, and experimental wiring is innumerable and disordered, is very easy to wrong.
According to the rules, for forceful electric power circuit shown in Figure 1 (motor rotating control) etc., after the student finishes experimental line and connects, must by the tutor check confirm errorless after, student's energising of can closing a floodgate experimentizes.And the teacher will check each experiment table circuit one by one in the face of the experiment table of more than 20 (even more), hardly may.So student's one combined floodgate appears, the accident that just is short-circuited, and particularly when the student can't judge line fault, the teacher had little time to teach, with normally carrying out of influence experiment.
We once imagined the whole wiring mistakes in the energy automatic diagnosis circuit.But find that if any 4 wiring points of experiment, the student just has 64 kinds of connection plans, wherein some kinds of wiring are correct.The electrical engineering laboratory desk upper contact is numerous, and then connection plan is an astronomical figure.Go bowl other to mistake from so numerous connection plans, this almost can't realize.So we are positioned at the fault of checking on common experiment teacher 12 types the basic wiring faults that must check, that can cause the wiring accident, as UV mutually just (instead) main circuit short circuit (opening circuit), U mutually heat cut off the power supply on the platform.
Summary of the invention
The purpose of this utility model is a development forceful electric power experimental line auto-check system, makes energy automatic diagnosis of experiment fault and prompting, helps the tutor to check, can reach to prevent accident potential, can time saving and energy savingly raise the efficiency again.
Experimental circuit automatic fault diagnosis device, it comprises single chip circuit, is connected to the photoelectricity coupled circuit of single-chip microcomputer output terminal, is connected to the decoder matrix circuit of photoelectric coupled circuit output end, the driving circuit that is connected to the decoding matrix output terminal and power circuit, it is characterized in that the driving circuit output terminal is connected to the fault sample circuit, one output termination experiment table circuit of fault sample circuit, another output termination fault identification circuit of fault sample circuit, the output terminal of fault identification circuit and singlechip interruption input end composition interrupt control circuit that joins.
Experimental circuit automatic fault diagnosis device adopts single-chip microcomputer to carry out programmed control, single-chip microcomputer is undertaken by system program substep diagnostic mode, the fault sample circuit adopts relay circuit to be connected between driving circuit and the experiment table circuit, and join with low-tension supply 24V circuit and experiment table circuit, operate careful and the generation accident to prevent the student.During detection, control circuit is connected on VW and goes up mutually, and the interlocking contactor adopts KM1 and KM2, and single-chip microcomputer and system software thereof carry out automatic diagnosis successively to all kinds of faults, and diagnostic result is shown respectively by each paths of LEDs lamp.Each road relay fault sample circuit connects fault identification circuit by an output terminal, it is to belong to short circuit, open circuit or fault type such as access and indicated by the different LED lamp not that this circuit can be differentiated fault, meanwhile export immediately a look-at-me to single-chip microcomputer to interrupt next patrol program, and after waiting for that detected fault is got rid of, after resetting, continue next program of patrol.After having detected all faults, system's indicating circuit non-fault.The main structure according to " motor positive and reverse rotation control circuit " and " Y/ △ start-up circuit " of this auto-check system is carried out hardware and corresponding software design, also can be used for other experimental lines that are close and carry out fault diagnosis, thereby corresponding versatility is arranged.
The characteristics of this experimental line auto-check system and beneficial effect at first are greatly to raise the efficiency, and education experiment can normally be carried out.Under tutor's demonstration, experimental line is carried out automatic diagnosis to the also available device of student and fault is got rid of.Employing+24V low pressure weak electricity measuring system adopts relay that forceful electric power experimental line and light current diagnostic system are isolated fully, can guarantee the safety of the person and diagnostic system.This auto-check system installation cost is not high, has preferable performance price ratio, and is simultaneously easy to maintenance, is easy to promote the use of.
Description of drawings
Fig. 1 is the motor positive and reverse rotation control circuit.
Fig. 2 is the utility model system architecture diagram.
Fig. 3 is for main circuit opens circuit, short trouble message sample circuit.
Fig. 4 is various fault information displayed map, and 1～12 pilot lamp is represented corresponding fault among the figure, indicates short circuit respectively, opens circuit or do not insert the classification of fault, and it is corresponding with the subordinate list 1 in the instructions.
Fig. 5 is the control program of system, and its right is an interruption subroutine.
Fig. 6 is expression single chip circuit, photoelectricity coupled circuit, fault identification circuit and interruption input circuit.
Fig. 7 is expression fault sample circuit, relay road driving circuit.
Embodiment
Relay-contact experimental circuit automatic fault diagnosis system is formed as shown in Figure 2, detailed circuit schematic diagram such as Fig. 6, shown in Figure 7, it is made up of main hardware, software two parts, hardware is mainly by Single Chip Microcomputer (SCM) program control, photoelectricity coupling, decoding matrix, driving, the sampling of relay fault diagnosis, nature of trouble identification, compositions such as fault type and character demonstration, power supply.Software mainly is mcu programming.
The more complicated that is connected of auto-check system and experiment table, it by A1～A43 totally 43 lines be connected with the experiment table circuit, to obtain various fault sampling voltages.How obtaining the fault sampling voltage, is the key of auto-check system design.
Single chip machine controlling circuit 1.Auto-check system adopts the 89C51 single-chip microcomputer, the automatic diagnosis of 12 class faults is carried out under Single-chip Controlling, by after the reset button, single-chip microcomputer is exported 12 class fault diagnosis enabling signals by totally 12 pins of P1, P2 mouth in turn, promptly in turn 12 pin output low levels, the low duration of each pin is 2 seconds.If experimental line has fault, will there be fault to interrupt (INT
1) signal sends into single-chip microcomputer (13 pin of IC1 among Fig. 6), then the corresponding output pin of single-chip microcomputer will maintain low level.
Photoelectricity coupling 2, decoding 3 and driving circuit 4.Be to improve antijamming capability, the fault diagnosis of single-chip microcomputer starts output and adopts the photoelectricity coupling, at the positive pole of 12 the photoelectrical coupler light emitting diodes pilot lamp LED that connects respectively
1～LED12 is in order to the indication fault diagnostic-type.Decoder matrix circuit is made up of 35 diodes, and its major function is: according to dissimilar fault diagnosises, (select some connections among the J1～J12) at 12 relays.The on/off of relay is made driving circuit with triode.
Fault diagnosis sample circuit 5.Realize the automatic fault diagnosis of forceful electric power experimental line, the failure message that how to extract in the experimental line is crucial.Be example with UVW phase fault, open circuit fault below, introduce failure message and extract principle.
Fig. 3 is that main circuit opens circuit, the failure message sample circuit of short circuit (it is the simplification that 24V rectification circuit and relay circuit and experimental line join among Fig. 7).Fault sample circuit 5 is made up of the coupled switch of+24V voltage stabilizing light current power supply and relay.+ 24V power supply is connected with one group of switch J1, J2, J3 of relay by R101 resistance, earth terminal is connected with another group switch J1, J2, the J3 of relay respectively after by resistance R 102, detects voltage U 1 and is taken between resistance R 102 and another group relay switch J1, J2, the J3.Its ultimate principle is, after the student connects the three-phase electricity experimental line, adds earlier+24V direct current diagnosis voltage, and the voltage U R size that produces according to sample resistance R102 is differentiated and opened circuit or short trouble.When the J1 switch connection, UR voltage has reflected opening circuit or short trouble between the UV winding; When the J2 switch connection, UR voltage has reflected opening circuit or short trouble between the VW winding; When the J3 switch connection, UR voltage has reflected opening circuit or short trouble between the WU winding.If open circuit fault, then UR=OV are arranged; If short trouble arranged, UR＞4V (this threshold voltage is decided on the resistance of the motor lines group of driving) then.UR output is exactly the A end output among Fig. 7.
More than diagnosis is based on the following fact, no matter how the student connects experimental line, if connect correctly, then the resistance value between the UVW winding has certain value, if resistance value is zero between winding, then means short circuit between winding; If resistance value is infinitely great between winding, then means between winding and open circuit.
In like manner, components and parts " are not inserted " failure message, can obtain by B, C end sampling among Fig. 7.
Fault identification circuit 6.The nature of trouble identification circuit is formed short circuit, is opened circuit or the identification circuit of place in circuit not by the voltage comparator U3 among Fig. 6, phase inverter U4 and LED14, the LED15, the LED16 that are connected to the U4 output terminal, and it can be according to the size identification fault of the input voltage of A, B, C end.
The short circuit identification circuit is by voltage comparator U3A, and phase inverter U4A outer meeting resistance R7～R11 capacitor C 7 and LED14 form.When the A end is high level, represent that main circuit has short trouble, U3A output this moment high level, anti-phase through U4A, the LED14 pilot lamp is lighted, and made 13 pin of IC1 obtain the low level look-at-me.
Open circuit identification circuit by voltage comparator U3B, and phase inverter U4B and resistance R 4, R5, R12～R16, LED15 form.When the A end is low level, represent that main circuit has open circuit fault, U3B output this moment high level, anti-phase through U4B, the LED15 pilot lamp is lighted, and made 13 pin of IC1 obtain the low level look-at-me.
Interrupt control circuit is connected to form by interrupting input end 13 pin of diode D4, D5, D6 and the single-chip microcomputer IC1 of U4 output terminal.
The software design flow chart as shown in Figure 5.Behind the single-chip microcomputer electrification reset, if click reset button again, will take turns output low level at 12 pins, each pin low level continues 2 seconds, during this period if the fault look-at-me is arranged, by then carry out interrupt service subroutine, and start hummer.
The fault type and the demonstration of diagnosis
This auto-check system the fault diagnosis type and show as being summarized as follows in conjunction with shown in the following table referring to Fig. 4,5:
| Sequence number | Sequence number shows | Test item | Fault and |
| 1 | Red | UV phase main circuit (just changeing) | Short circuit (red) open circuit (Huang) |
| 2 | Green | UV phase main circuit (counter-rotating) | |
| 3 | Yellow | U phase electrothermal relay | Do not insert (indigo plant) |
| 4 | Red | VW phase main circuit (just changeing) | Short circuit (red) open circuit (Huang) |
| 5 | Green | VW phase main circuit (counter-rotating) | |
| 6 | Yellow | W phase electrothermal relay | Do not insert (indigo plant) |
| 7 | Red | WU phase main circuit (just changeing) | Short circuit (red) open circuit (Huang) |
| 8 | Green | WU phase main circuit (counter-rotating) | |
| 9 | Blue | Control circuit | Short circuit (red) open circuit (Huang) |
| 10 | Yellow | Overload protection | Do not insert (indigo plant) |
| 11 | Blue | KM1 interlocking contact (or KM2 coil) | Do not insert (indigo plant) |
| 12 | Blue | KM2 interlocking contact (or KM1 coil) | Do not insert (indigo plant) |
| * | Green (greatly) | Circuit is normal substantially |
The auto-check system follow procedure is taked the mode of substep diagnosis.After the key switch opens, the auto-check system energising, fault type pilot lamp (or sequence number pilot lamp 1～12) is lighted in order, and the expression system carries out automatic diagnosis to 12 class faults in order.When diagnosis is finished, then the right " finishing " large size green light is lighted, and this expression wiring is in the main true, and can turn off auto-check system, carries out the forceful electric power experiment.If there is not fault, then diagnose a required time to be about 25 seconds.
If when detecting a certain type student experimental wiring fault and existing, then the sequence number pilot lamp will be grown bright, it is also long bright to hold itself out to be which kind of fault simultaneous faults character pilot lamp (short circuit, open circuit, insert), the expression nature of trouble is short circuit or opens circuit or not access, hummer will send ring tone simultaneously, reminds classmate's corrigendum.If found mistake through checking, and corrected that then indicating fault can disappear.But hummer is still being called out, and requires student's startups that reset, and diagnoses once more again, can not break down to guarantee experimental wiring.
Claims (8)
1, experimental circuit automatic fault diagnosis device, it comprises single chip circuit (1), be connected to the photoelectricity coupled circuit (2) of single-chip microcomputer output terminal, be connected to the decoder matrix circuit (3) of photoelectric coupled circuit output end, be connected to the driving circuit (4) and the power circuit (7) of decoding matrix output terminal, it is characterized in that driving circuit (4) output terminal is connected to fault sample circuit (5), one output termination experiment table circuit of fault sample circuit (5), another output termination fault identification circuit (6) of fault sample circuit (5), the output terminal of fault identification circuit (6) and single-chip microcomputer (1) the interrupting input end composition interrupt control circuit that joins.
2, experimental circuit automatic fault diagnosis device according to claim 1 is characterized in that fault sample circuit (5) is made up of the coupled switch of+24V voltage stabilizing electricity weak mains and relay.
3, experimental circuit automatic fault diagnosis device according to claim 2, it is characterized in that short circuit and the sample circuit that opens circuit are connected with one group of switch J1, J2, J3 of relay by R101 resistance by+24V power supply, earth terminal is connected with another group switch J1, J2, the J3 of relay respectively after by resistance R 102, detects voltage U R and is taken between resistance R 102 and another group relay switch J1, J2, the J3.
4, experimental circuit automatic fault diagnosis device according to claim 1, it is characterized in that fault identification circuit (6) by voltage comparator U3 and phase inverter U4, LED14, LED15, the LED16 that is connected to the U4 output terminal form short circuit, open circuit or the identification circuit of place in circuit not.
5, experimental circuit automatic fault diagnosis device according to claim 4 is characterized in that the short circuit identification circuit is made up of voltage comparator U3A phase inverter U4A resistance R 7～R11 capacitor C 7 and LED14.
6, experimental circuit automatic fault diagnosis device according to claim 4, the identification circuit that it is characterized in that opening circuit is made up of voltage comparator U3B phase inverter U4B resistance R 4, R5, R12～R16, LED15.
7, experimental circuit automatic fault diagnosis device according to claim 4 is characterized in that not inserting identification circuit and is made up of the diode bridge rectifier circuit that is connected to B end and C end, photoelectricity coupling U1, U4D phase inverter, LED16 display tube.
8, experimental circuit automatic fault diagnosis device according to claim 1 is characterized in that interrupt control circuit is connected to form by interrupting input end 13 pin of diode D4, D5, D6 and the single-chip microcomputer IC1 of U4 output terminal.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN 200520101416 CN2831149Y (en) | 2005-04-02 | 2005-04-02 | Fault auto analyzer for test circuit |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN 200520101416 CN2831149Y (en) | 2005-04-02 | 2005-04-02 | Fault auto analyzer for test circuit |
Publications (1)
| Publication Number | Publication Date |
|---|---|
| CN2831149Y true CN2831149Y (en) | 2006-10-25 |
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Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| CN 200520101416 Expired - Fee Related CN2831149Y (en) | 2005-04-02 | 2005-04-02 | Fault auto analyzer for test circuit |
Country Status (1)
| Country | Link |
|---|---|
| CN (1) | CN2831149Y (en) |
Cited By (9)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN101540120B (en) * | 2007-07-26 | 2013-04-03 | 浙江天煌科技实业有限公司 | Network-based system and network-based method for automatically diagnosing experimental wiring |
| CN103116102A (en) * | 2013-02-04 | 2013-05-22 | 深圳佰维存储科技有限公司 | Intelligent power failure testing method and system |
| CN103336240A (en) * | 2013-06-04 | 2013-10-02 | 上海华力微电子有限公司 | A test circuit applied to chip tests of integrated circuits |
| CN103454557A (en) * | 2013-08-29 | 2013-12-18 | 华为技术有限公司 | Method and device for detecting cable fault |
| CN104680905A (en) * | 2015-03-03 | 2015-06-03 | 华南理工大学 | Teaching process automatic monitoring system applied to experiment teaching and monitoring method thereof |
| CN104809946A (en) * | 2015-04-26 | 2015-07-29 | 李力 | Intelligent teaching and checking system for electrical control experimental training |
| CN108766089A (en) * | 2018-06-04 | 2018-11-06 | 浙江大学 | The diagnostic system and method for electric wiring wiring faults |
| WO2019080315A1 (en) * | 2017-10-28 | 2019-05-02 | 深圳市前海安测信息技术有限公司 | Method and system for fault self-diagnosis of service robot |
| CN110794730A (en) * | 2019-10-18 | 2020-02-14 | 合肥森弗卡电子科技有限公司 | Intelligent test analysis system for safety technology protection engineering |
-
2005
- 2005-04-02 CN CN 200520101416 patent/CN2831149Y/en not_active Expired - Fee Related
Cited By (11)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN101540120B (en) * | 2007-07-26 | 2013-04-03 | 浙江天煌科技实业有限公司 | Network-based system and network-based method for automatically diagnosing experimental wiring |
| CN103116102A (en) * | 2013-02-04 | 2013-05-22 | 深圳佰维存储科技有限公司 | Intelligent power failure testing method and system |
| CN103116102B (en) * | 2013-02-04 | 2016-08-31 | 深圳佰维存储科技有限公司 | Intelligent power failure method of testing and system |
| CN103336240A (en) * | 2013-06-04 | 2013-10-02 | 上海华力微电子有限公司 | A test circuit applied to chip tests of integrated circuits |
| CN103454557A (en) * | 2013-08-29 | 2013-12-18 | 华为技术有限公司 | Method and device for detecting cable fault |
| CN103454557B (en) * | 2013-08-29 | 2016-06-22 | 华为技术有限公司 | The detection method of a kind of cable fault and detecting device |
| CN104680905A (en) * | 2015-03-03 | 2015-06-03 | 华南理工大学 | Teaching process automatic monitoring system applied to experiment teaching and monitoring method thereof |
| CN104809946A (en) * | 2015-04-26 | 2015-07-29 | 李力 | Intelligent teaching and checking system for electrical control experimental training |
| WO2019080315A1 (en) * | 2017-10-28 | 2019-05-02 | 深圳市前海安测信息技术有限公司 | Method and system for fault self-diagnosis of service robot |
| CN108766089A (en) * | 2018-06-04 | 2018-11-06 | 浙江大学 | The diagnostic system and method for electric wiring wiring faults |
| CN110794730A (en) * | 2019-10-18 | 2020-02-14 | 合肥森弗卡电子科技有限公司 | Intelligent test analysis system for safety technology protection engineering |
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Legal Events
| Date | Code | Title | Description |
|---|---|---|---|
| C14 | Grant of patent or utility model | ||
| GR01 | Patent grant | ||
| C17 | Cessation of patent right | ||
| CF01 | Termination of patent right due to non-payment of annual fee |
Granted publication date: 20061025 |