CN108020776A - Equipment fault intelligent diagnostics device and method based on frock Yu LabVIEW data collection and analysis - Google Patents

Equipment fault intelligent diagnostics device and method based on frock Yu LabVIEW data collection and analysis Download PDF

Info

Publication number
CN108020776A
CN108020776A CN201711310337.2A CN201711310337A CN108020776A CN 108020776 A CN108020776 A CN 108020776A CN 201711310337 A CN201711310337 A CN 201711310337A CN 108020776 A CN108020776 A CN 108020776A
Authority
CN
China
Prior art keywords
test
circuit
circuit board
under test
board under
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.)
Pending
Application number
CN201711310337.2A
Other languages
Chinese (zh)
Inventor
种银保
张诗慧
晋雪旻
赵鹏
肖晶晶
刘九零
潘文才
李梦
Current Assignee (The listed assignees may be inaccurate. Google has not performed a legal analysis and makes no representation or warranty as to the accuracy of the list.)
Chongqing Shengheng Medical Technology Co.,Ltd.
Second Affiliated Hospital Army Medical University
Original Assignee
Second Affiliated Hospital Army Medical University
Priority date (The priority date 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 date listed.)
Filing date
Publication date
Application filed by Second Affiliated Hospital Army Medical University filed Critical Second Affiliated Hospital Army Medical University
Priority to CN201711310337.2A priority Critical patent/CN108020776A/en
Publication of CN108020776A publication Critical patent/CN108020776A/en
Pending legal-status Critical Current

Links

Classifications

    • GPHYSICS
    • G01MEASURING; TESTING
    • G01RMEASURING ELECTRIC VARIABLES; MEASURING MAGNETIC VARIABLES
    • G01R31/00Arrangements for testing electric properties; Arrangements for locating electric faults; Arrangements for electrical testing characterised by what is being tested not provided for elsewhere
    • G01R31/28Testing of electronic circuits, e.g. by signal tracer
    • G01R31/2801Testing of printed circuits, backplanes, motherboards, hybrid circuits or carriers for multichip packages [MCP]
    • G01R31/2806Apparatus therefor, e.g. test stations, drivers, analysers, conveyors
    • GPHYSICS
    • G01MEASURING; TESTING
    • G01RMEASURING ELECTRIC VARIABLES; MEASURING MAGNETIC VARIABLES
    • G01R31/00Arrangements for testing electric properties; Arrangements for locating electric faults; Arrangements for electrical testing characterised by what is being tested not provided for elsewhere
    • G01R31/28Testing of electronic circuits, e.g. by signal tracer
    • G01R31/2832Specific tests of electronic circuits not provided for elsewhere
    • G01R31/2834Automated test systems [ATE]; using microprocessors or computers
    • GPHYSICS
    • G01MEASURING; TESTING
    • G01RMEASURING ELECTRIC VARIABLES; MEASURING MAGNETIC VARIABLES
    • G01R31/00Arrangements for testing electric properties; Arrangements for locating electric faults; Arrangements for electrical testing characterised by what is being tested not provided for elsewhere
    • G01R31/28Testing of electronic circuits, e.g. by signal tracer
    • G01R31/2832Specific tests of electronic circuits not provided for elsewhere
    • G01R31/2836Fault-finding or characterising
    • G01R31/2846Fault-finding or characterising using hard- or software simulation or using knowledge-based systems, e.g. expert systems, artificial intelligence or interactive algorithms

Abstract

The present invention discloses a kind of equipment fault intelligent diagnostics device and method based on frock Yu LabVIEW data collection and analysis.The hardware components of the device include power supply, test fixture, interface board, capture card and computer, and the software section of device is made of LabVIEW platform combination failure diagnostic reasoning strategy.Its intelligent fault diagnosis method is:Computer utilizes the operating mode of the virtual circuit board under test of LabVIEW softwares, capture card gather that circuit board under test is normal respectively by interface board and malfunction under each test point response signal, and the processing such as pretreatment and characteristic parameter extraction is carried out, establish corresponding database;Fault diagnosis reasoning software is compared standard and Mishap Database, and the fault message of circuit board under test is deduced with the knowledge in knowledge base, completes fault diagnosis.The present invention can carry out intelligent fault diagnosis to specific circuit board under test, contribute to the failure of Maintenance Engineer's quick diagnosis special equipment.

Description

Equipment fault intelligent diagnostics based on frock and LabVIEW data collection and analysis fill Put and method
Technical field
The invention belongs to intelligent fault diagnosis technology, and in particular to one kind is based on frock with LabVIEW data acquisitions with dividing The equipment fault intelligent diagnostics device and method of analysis.
Background technology
With advancing by leaps and bounds for electronics industry development, industry looks are vigorous.And electronic product has also penetrated into people Each corner in class production and living, from household electrical appliance to sophisticated weapons, the figure of circuit board is ubiquitous.Modern medical service electronics Equipment is no exception, and substantial amounts of novel electron material, electronic technology, electronic component are used by Medical Devices manufacturer, and And new equipment is researched and developed on this basis, new technology principle is established, develops new function.So composition knot of medical treatment electronic equipment Structure is more complicated, and circuit theory is also not quite similar.
Meanwhile because medical treatment electronic equipment plays increasingly heavier angle in the disease diagnosis and therapy of clinical position Color, clinical practice field propose the stability, reliability, security of medical treatment electronic equipment the requirement of higher so that medical treatment Electronic equipment can reliability service and related guarantee work paid close attention to be subject to use and maintenance personnel.It can be seen from the above that medical electronics is set The accurate detection and diagnosis of standby failure, have become one of important process content of engineering in medicine practice.
The cardinal principle that traditional medical treatment electronic equipment fault detection and diagnosis technology relies on is:First basis is set Maintenance Engineer Standby phenomenon of the failure preliminary analysis reason, then using discrete detection device such as signal generator, universal meter, oscillograph etc., according to According to medical treatment electronic equipment system composition and operation principle, according to signal intensity rule, signal flow direction to all kinds of electrical parameters into Row measurement, comprehensive analysis is carried out in conjunction with the personal experience of Maintenance Engineer with history maintenance record to malfunction, so that Go out diagnostic result.The process of whole investigation failure is cumbersome time-consuming, and is easily influenced by Maintenance Engineer's subjective experience.
The content of the invention
Intelligently examined based on frock and the equipment fault of LabVIEW data collection and analysis the object of the present invention is to provide a kind of Disconnected device and method, can make the fail result inferred more accurately, rationally, be conducive to Maintenance Engineer and make accurate judgment.
Equipment fault intelligent diagnostics device of the present invention based on frock Yu LabVIEW data collection and analysis, bag Include:Power supply, test fixture, interface board, capture card and computer;
Power supply is powered by test fixture for circuit board under test, while is also powered for interface board and capture card;
Test fixture is connected by interface board with capture card;
Interface board expands signalling channel for capture card;
Capture card inputs various pumping signals by test fixture for circuit board under test, and will be collected by serial mode Response signal be sent in computer;
Computer realizes the generation of various pumping signals by programming, while the response signal of collection is located in advance Reason and characteristic parameter extraction, fault diagnosis is completed in conjunction with knowledge base and inference strategy;
During test, circuit board under test is placed on test fixture by needle bed, which is equipped with multiple surveys Pilot, the needle bed is equipped with quantity and arrangement mode is identical with the quantity and arrangement mode of the test point on circuit board under test The signal of test point, is transported on interface board by probe by probe.
Intelligent fault diagnosis method of the present invention, using intelligent fault diagnosing device as described in the present invention, its side Method comprises the following steps:
Step 1: computer utilizes the operating mode of the virtual circuit board under test of LabVIEW softwares;
Step 2: under predetermined operating mode, capture card gathers circuit board under test normal condition by interface board respectively Under each test point response signal, and carry out pretreatment and characteristic parameter extraction processing, establish standard database;
Step 3: under predetermined operating mode, capture card gathers circuit board under test malfunction by interface board respectively Under each test point response signal, and carry out pretreatment and characteristic parameter extraction processing, establish Mishap Database;
Step 4: standard and Mishap Database are compared using fault diagnosis software, with the knowledge in knowledge base The fault message of circuit board under test is deduced, completes fault diagnosis.
In the step 3, for analog cell circuit, relatively and reflecting for its characteristic parameter, input terminal and output terminal is judged Relation is penetrated, if by the way that the analog cell circuit is normal, if not by the way that the fault diagnosis for deducing the circuit board under test is believed Breath;For digital units circuit, compare the response code of its output terminal, if by the way that measured number element circuit is normal, if not By then deducing the failure diagnosis information of the circuit board under test.
The detection principle is:
Detection ordering is from rear class element circuit to prime element circuit;Under certain operating mode, last is detected Level element circuit, if by the way that the circuit board under test is normal;If not by time rear stage element circuit being detected, until completion pair The detection of all element circuits, exports diagnostic result.
The present invention has the following advantages:The device is fast with detection time, and detectable signal passage is more, and easily storage etc. is excellent Point;Simultaneous faults diagnosis employs expert system and the mode of inference machine, and when diagnosis is simulated by applying different driving sources The different situations of circuit board under test, so as to detect operating condition of the circuit board under test under different conditions, make to infer Fail result it is more accurate, rationally, be conducive to Maintenance Engineer and make accurate judgment.
Brief description of the drawings
Fig. 1 is the connection figure of apparatus of the present invention;
Fig. 2 is soft tissue therapeutic apparatus structural principle block diagram;
Fig. 3 is test fixture schematic diagram;
Fig. 4 collects for test fixture GZ_J1 signal messages;
Fig. 5 collects for test fixture GZ_J2 signal messages;
Fig. 6 is interface board circuit schematic diagram;
Fig. 7 is capture card analog channel technical parameter;
Fig. 8 is capture card digital channel technical parameter;
Fig. 9 is knowledge base Establishing process figure;
Figure 10 is microcontroller main control unit circuit diagram;
Figure 11 is low frequency generating unit circuit diagram;
Figure 12 is data selection unit circuit diagram;
Figure 13 is intensity control unit circuit diagram;
Figure 14 is waveform output unit circuit diagram;
Figure 15 is measured signal list;
Figure 16 is master control borad fault diagnosis general rule flow chart;
Figure 17 is the Failure Diagnostic Code flow chart of microcontroller main control unit;
Figure 18 is the flow chart of low-frequency pulse generating unit Failure Diagnostic Code;
Figure 19 is the flow chart of data selection unit Failure Diagnostic Code;
Figure 20 is the flow chart of intensity control unit Failure Diagnostic Code;
Figure 21 is the flow chart of waveform output unit Failure Diagnostic Code;
Figure 22 is system fault diagnosis functional block diagram;
Figure 23 is system software architecture block diagram;
Figure 24 is system login interface;
Figure 25 is to repair password or register interface;
Figure 26 is main interface;
Figure 27 passes through interface for test;
Figure 28 does not pass through interface for test;
Figure 29 is intensity linear fit interface;
Figure 30 passes through interface for fault diagnosis;
Figure 31 does not pass through interface for fault diagnosis;
Embodiment
The invention will be further described below in conjunction with the accompanying drawings.
Equipment fault intelligent diagnostics device of the present invention based on frock Yu LabVIEW data collection and analysis, bag Power supply 1, test fixture 2, interface board 4, capture card 5 and computer 6 are included, referring to Fig. 1.
The power supply 1 is powered by test fixture 2 for circuit board under test 3, while is also powered for interface board 4 and capture card 5.
The test fixture 2 is connected by interface board 4 with capture card 5.
The interface board 4 expands signalling channel for capture card 5.
The capture card 5 inputs various pumping signals by test fixture 2 for circuit board under test 3, and passes through serial mode The response signal collected is sent in computer 6.
The computer 6 realizes the generation of various pumping signals by programming, at the same to the response signal of collection into Row pretreatment and characteristic parameter extraction, complete failure with inference strategy in conjunction with knowledge base and examine.
During test, circuit board under test 3 is placed on test fixture 2 by needle bed, which is equipped with multiple Test point, the needle bed are equipped with quantity and arrangement mode and the quantity and arrangement mode phase of the test point on circuit board under test 3 The signal of test point, is transported on interface board 4 by same probe by probe.
The present invention will be described in detail by taking the master control borad circuit of soft tissue therapeutic apparatus as an example below:
(1) circuit board under test
In the present embodiment, experimental machine selects our independent researches and obtains CFDA (i.e. state food pharmaceuticals administration is total Office) registration, while in the III type soft tissue therapeutic apparatus of YDB- of thousands of of market sale.The model machine is mainly by power supply, master control borad, work( Plate is put, TDP (i.e. specific electromagnetic wave spectrum) is formed with magnetic therapy and peripheral hardware, referring to Fig. 2.The device will carry out master control borad circuit Off line test, and pumping signal analog functuion button is provided by system, the working status of circuit board is controlled, it is then right again Involved in master control borad circuit to measured signal be acquired and analyze storage.
(2) test fixture
In the present embodiment, test device uses quick hand clamping type test fixture, such as referring to Fig. 3.Test fixture includes handle 7th, shell 8, sky plate 9, compression bar 10, supporting plate 12, needle bed 13 and interface 11.The shell 8 of test fixture uses black electricity glass timber Matter, the material insulation performance is good, high-temperature corrosion resistance, high mechanical strength, it is not easy to Deformation And Metamorphism;And sky plate 9 is then using transparent Acrylic board, because its excellent transparency is easily observe that the overall picture of circuit board under test 3, and light tough, antistatic high temperature resistant; Compression bar 10 is used for fixing circuit board under test 3;Supporting plate 12 is used for placing circuit board under test 3;Needle bed 13 is then according on circuit board under test 3 The distribution of test point is measured to assign probe using the method for back side knit stitch, because so probe fixation is not easy to break Damage, test point are capable of the contact of safety and firmness with probe;The effect one of interface 11 is to provide stabilized power source for circuit board under test, is made Normal work;Second, the signal that needle bed 13 is gathered is drawn, and it is sent into rear class unit and is analyzed and processed;Third, it is electricity to be measured 3 input stimulus of road plate, make circuit board under test 3 be in specific working status, carry out signal measurement.Therefore, the present apparatus is drawn Three interfaces are (power interface), GZ_J2 (pumping signal input interface), GZ_J3 (measured signal output interface), GZ_ respectively J1 is connected with power supply, powers for frock;GZ_J2 is connected for I/O mouthfuls with capture card numeral, receives pumping signal;GZ_J3 is with connecing Oralia 4 is connected, easy to extend capture card port number.Wherein:Definition to GZ_J3 signal output interfaces is referring to Figure 15, to GZ_ The definition of J1 and GZ_J2 is referring to Fig. 4 and Fig. 5.
(3) interface board
In the present embodiment, measured signal does not meet the parameter request of capture card, is mainly manifested in:
1. it is excessive to gather signal group number:Existing collection card channel is inadequate, can not realize that multiple signals gather at the same time.It is known to treat Signal up to 30 tunnels are surveyed, and the analog acquisition passage of capture card only has 16, it is therefore desirable to extended channel.
2. collection signal does not meet capture card parameter request:Collection signal voltage amplitude exceeds capture card maximum voltage model Enclose.Investigate 741 chips whether normal power supply when, it is necessary to gather the voltage whether its power pins input ± 12V, and capture card Maximum input voltage scope be -10V-10V, it is therefore desirable to design bleeder circuit.
That is, interface board 4 needs to have two functions:First, extended channel, gates multichannel analog signals, Second, need to be directed to the Design of Signal bleeder circuit beyond capture card input range.
In the present embodiment, interface board 4 selects 1 analog switch AD7506 i.e. U1 and U2 using two piece 16, and NI-USB6216 is adopted Truck is extended into row of channels.Specific implementation method provides power supply, by interface JK_J1 and power supply for interface board 4 first referring to Fig. 6 It is connected;Secondly, each test point signal that test fixture 2 is drawn is connected by interface JK_J2 with interface board 4;Then, will 5 digital output channel of capture card utilizes 8 bit digitals on NI-USB6216 capture cards with the JK_J3 interfaces of interface board 4 with being connected The gating at the address end, wherein the 5-8 foot control U1 chips of JK_J3 interfaces of two pieces of AD7506 of I/O mouthfuls of control, JK_J3 interfaces The gating of 1-4 foot control U2 chips;Finally, the two-way analog input channel of the JK_J4 interfaces of interface board 4 and capture card is connected Connect, when controlling address constantly to convert for digital I/O mouthfuls, two-way analog input channel can essentially be to 32 tunnel analog signals Collection, realizes the extension of analog input channel.
(4) capture card
In the present embodiment, the model NI-USB6216 of capture card.Its important technological parameters is as follows:
1. 16 tunnel simulation inputs (16,400kS/s);
2. 2 tunnel simulation outputs (16,250kS/s);32 railway digital I/O lines;2 32 digit counters;
3. 60V, CATI isolation (1000Vrms, 5s instantaneously isolate) make accuracy and security more preferably;
4. the lasting high-speed data-flow on NI signal implementing reading and writings USB;OEM editions can be provided;
5. with NI LabVIEW;ANSIC/C++;C#;Visual Basic.NET;Visual Basic6.0 are compatible;
6. NI-DAQmx drive softwares and NI LabVIEW SignalExpress LE interactive data logging softwares.
In numerous passages that NI-USB 6216 is provided, digital I/O mouthfuls and simulation input have mainly been used in the present embodiment Mouthful, on the passage of these types of type, their technical parameter requirement is referring to Fig. 7 and Fig. 8.
(5) computer
In the present embodiment, select a kind of virtual based on G language (Graphics Language, graphical programming language) Instrument software developing instrument carries out programming.Virtual instrument is actually that instrument is loaded computer, with general calculating Machine hardware and operating system realize various instrumental functions to rely on.It not only includes dedicated for design data capture program Function library and developing instrument storehouse with instrument control procedure, while also there is simple and clear front panel user interface and flow chart The coding style of formula, designer need not write the code of any text formatting, be real engineer's language.In the present embodiment In, which includes knowledge base and establishes unit and inference machine unit.
(6) knowledge base establishes unit
The object of the present embodiment research is the master control borad circuit of soft tissue therapeutic apparatus, now establishes knowledge according to below scheme Storehouse.Referring to Fig. 9.
1. circuit board under test is split
Master control borad circuit is split as five units by function is existing:Microcontroller main control unit, low-frequency pulse generating unit, number According to selecting unit, intensity control unit and waveform output unit.
2. element circuit signal analysis
Microcontroller main control unit:A complete scm application system is formed for core with 8031, includes address decoder 74LS139, address latch 74ls373, program storage 2764, with the 8155 LED display interface circuits formed and with Key press detecting circuit etc. that 74LS04 is formed, completes the YDB (i.e. far infrared electromagnetic radiation) of whole instrument, prescription, timing, by force The functions such as degree, reset, output control and display.The electric power thus supplied of each chip is mainly investigated when detecting this element circuit, with And microcontroller crystal oscillator starting of oscillation situation, reset circuit working condition etc., referring to Figure 10.
Low-frequency pulse generating unit:Using 8031 timer internal T1 timings, timing produces internal interrupt when overflowing, in Disconnected service routine is analyzed, and 2 555 timers produce two different duties respectively since resistance is different with the value of capacitance The square wave of ratio, i.e. rarefaction wave and condensation wave.It is main to consider two dilatational wave generation 555 timers of chip when detecting the element circuit Electric power thus supplied and output waveform it is whether normal, referring to Figure 11.
Data selection unit:By the selection control terminal i.e. port A, port B and the port that control data selector 74LS151 C, the pulse to generation make choice.Its middle port B, C are grounded, then when port A is 1, unit output condensation wave;As port A For 0 when, the data selection unit output rarefaction wave;When port A constantly conversions between 0,1, data selection unit output is dredged Condensation wave.In addition discontinuous wave is exported by controlling the Enable Pin i.e. port E of data selector.It is main when detecting this element circuit Considering chip 74LS151 power supplies, whether the normal and selection function of dilatational wave and discontinuous wave is normal, referring to Figure 12.
Intensity control unit:Monolithic processor controlled signal strength can be set by the intensity button on keypad, pass through 8 two After system digital analog converter DAC0832 carries out digital-to-analogue conversion, export as an electrical current, then voltage signal be converted into by amplifier, It is and in a linear relationship between the intensity level set in the amplitude and therapeutic equipment panel of the voltage signal.When detecting this element circuit Whether main investigation chip powers normally, and whether the strength values set keep linearly closing with Real output waveform amplitude System, referring to Figure 13.
Waveform output unit:The voltage signal of intensity control unit output adds to the I/O ports of two-way switch CD4066, number The pulse exported according to selecting unit adds to the control terminal of CD4066, the output of the low and high level control voltage signal of control terminal pulse With by making the frequency of the output terminal of CD4066, pulsewidth, and amplitude is then by the I/O ends of CD4066 with the pulse change of control terminal The voltage signal control of mouth.The ripple whether chip CD4066 powers normally and export mainly is investigated when detecting this element circuit Whether shape is normal, referring to Figure 14.
3. test point selection and its characteristic parameter extraction
It is that functional test is carried out to circuit board on system testing spirit, is to 3 input stimulus source of circuit board under test, adopts Collection output signal, and the functional relation of input/output signal is observed to judge whether systemic-function is normal.According to circuit under test The fractionation of plate 3 and the analysis of each unit circuit signal, now choose the power end of each unit circuit core component, control terminal, defeated It is test point to enter end and output terminal.The electrical parameter of each test point is gathered, calling LabVIEW controls are pre-processed and characteristic parameter Extraction process.
4. circuit board under test knowledge base is established
According to each unit circuit theory mentioned above, in conjunction with chip data, by the important letter to be measured of each unit circuit Number carry out unified integration, be combed into table, the table abundant information, can fully reflect 30 road signals to be measured test call the roll Title, test point information, pin name, pin type, signal type (analog or digital), signal characteristic, referring to Figure 15.While according to According to circuit under test partitioned signal observing and controlling principle, the mapping ruler of above-mentioned 3 each test point of circuit board under test is established.
(7) inference machine unit
(1) master control borad fault diagnosis general rule
Referring to Figure 16, the detection ordering of each unit circuit is then by rear class element circuit to prime element circuit.First, it is Control variable will carry out signal detection under certain prescription pattern and intensity, secondly, first to key testpoint TPs1, TPs2 ... TPsj is detected, that is, the output of detection each unit circuit, for example first detects the output TPsj of afterbody element circuit Whether by if passing through, then it is assumed that the circuit board under test 3 is normal, if not by, element circuit DMj is detected, and Result is analyzed and processed;Then whether time output of rear stage element circuit is detected by if having not by equally to this Element circuit DMj-1 is detected;If by, the output to secondary rear secondary unit circuit is detected, and is circulated successively, until Detect that element circuit output passes through or all element circuits are detected and finished, export diagnostic result, circuit board under test 3 detects Terminate.
(2) Failure Diagnostic Code of each unit circuit
(a) Failure Diagnostic Code of microcontroller main control unit, referring to Figure 17.
First, detect in governor circuit whether each chip power supply is normal, if abnormal electrical power supply, terminate to judge, if normally, if Arbitrary initial state is put, crystal oscillator frequency is detected, judges whether test error is excessive, if, then it is assumed that crystal oscillator damages, and terminates to sentence It is disconnected, if it is not, being then detected to ALE (i.e. address latch signal) frequency, judge whether test error is excessive, if, then it is assumed that 8031 wafer damages, terminate to judge, if it is not, pressing reset key, judge whether RESET (resetting) is connected to positive pulse, if so, then By terminating to judge, if not, then it is assumed that reset circuit front end failure.
(b) Failure Diagnostic Code of low-frequency pulse generating unit, referring to Figure 18.
Judge whether two piece of 555 chip power supply be normal, if not, then it is assumed that abnormal electrical power supply, terminates to judge, if so, then to dredging The duty cycle of Bomi ripple, cycle are checked, judge whether test error is excessive, if not, then it is assumed that 555 failure of chip, terminate Judge, if so, representing to pass through, end judges flow.
(c) Failure Diagnostic Code of data selection unit, referring to Figure 19.
Judge whether the power supply of 74LS151 chips is normal, if not, then it is assumed that line fault, terminates to judge, if so, then sentencing Whether disconnected input waveform error is excessive, if, then it is assumed that line fault, if it is not, it is 0 then to set intensity, prescription three, judges address Whether end A inputs rectangular wave, if not, then it is assumed that and 8031 timer failures, terminate to judge, if so, it is 0 then to set intensity, prescription Four, judge whether Enable Pin inputs rectangular wave, if not, then it is assumed that 8031 timer failures, terminate to judge, if so, setting intensity 50, prescription one judges whether 74LS151 exports rarefaction wave, if not, then it is assumed that 74LS151 failures, terminate to judge, if, then it represents that By the way that end judges flow.
(d) Failure Diagnostic Code of intensity control unit, referring to Figure 20.
First determine whether each chip power supply is normal in intensity control unit, if not, then it is assumed that abnormal electrical power supply, terminates to sentence It is disconnected, if so, setting 50 prescription one of intensity, output and true signal are contrasted, judge whether test error is excessive, if it is not, representing By, terminate to judge, if so, being interval with 10, set intensity to change from 60-150, fitting linear function, contrast true value test Whether error meets the requirements, if so, then line fault, terminates to judge, if not, then it is assumed that DAC0832 failures, terminate to judge stream Journey.
(e) Failure Diagnostic Code of waveform output unit, referring to Figure 21.
First determine whether CD4066 chip power supplies are normal, if not, then it is assumed that abnormal electrical power supply, terminates to judge, if so, setting 50 prescription one of intensity, output and true signal are contrasted, judge whether test error is excessive, if it is not, representing to pass through, terminate to sentence It is disconnected, if so, judge whether the error of input signal is excessive, if it is not, CD4066 failures, terminate to judge, if so, in two kinds of situation, One kind is wrong for waveform, line fault, terminates to judge;Another kind is wrong for amplitude, line fault, and end judges flow.
(8) system testing principle, referring to Figure 22
When circuit board is in serviceable condition, the input/output signal of each functional unit block circuit of learning circuit plate first And its relation, determine the key testpoint of each unit module, establish corresponding knowledge base and inference strategy.Its subsystem is in virtual mould Propose under standby certain operational mode state, gather the response signal (master sample) of each test point on preferred circuit plate, through pre- place Reason, characteristic parameter extraction, are stored in respective standard database.
When circuit board is in malfunction, system gathers failure under the same operational mode state of virtual analog equipment The response signal (fault sample) of each test point of circuit board, preprocessed, characteristic parameter extraction, is stored in corresponding failure database.
When each test point signal acquisition of faulty board, pretreatment, characteristic parameter extraction and it is stored in the completion of corresponding failure database Afterwards, the inference machine that system is established surveys surveyed faulty circuit plate according to the corresponding knowledge base and inference strategy that have learnt to establish Pilot signal test point signal corresponding to having deposited preferred circuit plate is analysed and compared one by one according to inference strategy, until finding out event Hinder unit and its component.
(9) software is realized
Software section is test system important component, follows modular design method in design process and stratification is set Principle is counted, makes whole system that there is stronger scalability and good maintainability.The system is based primarily upon LabVIEW A kind of programming development environment, is developed by American National instrument (NI) company) software platform progress programming, realize so One multiple signals input, the system of mono signal output.Software frame is made of bottom, driving layer and application layer, wherein bottom Including input signal control module, address strobe module and signal acquisition and processing module;Layer is driven to include device drive layer, survey Try sentence driving layer and test subroutine driving layer;Application layer is mainly human-computer interaction interface, including system login module, intensity Linear fit module, fault diagnosis module, waveform look back module and report generation module etc., referring to Figure 23.
It is user's login interface first, referring to Figure 24, to Modify password or the new user of registration, referring to Figure 25.
It is main interface after into system, referring to Figure 26, is mainly made of six parts, is title, test point inforamtion tree respectively Shape figure, the display of test result, that is, report, information alert frame and function button start test, fitting result and fault diagnosis.
Operation starts, and system is first initialized each control, while information alert frame can be shown " initialization is normal "; Click on " starting to test ", test point information dendrogram and three function buttons are in disabled status, while information alert frame is shown Show testing progress, such as " just in testing, 48.0% ";
After the completion of test, test point information dendrogram and three function buttons are in enabling state, information alert frame meeting Show test result " program complete, test pass through " or " test is completed, and test does not pass through ", at the same test result can show it is each The test information of test point and as a result, in addition, clicks on certain test point in test point dendrogram, you can show the test point Waveform and reference waveform to be measured.If clicking on " fitting result " button, intensity linear fit interface is redirected;If clicking on, " failure is examined It is disconnected " button, then fault diagnosis interface is jumped to, referring to Figure 27, Figure 28.
" fitting result " button is clicked on, intensity linear fit interface is redirected, referring to Figure 29." starting to be fitted " button is clicked on, Intensity will be set to 0 by the system automatically, and its waveforms amplitude is tested in increase by 10 successively, measure 7 amplitudes altogether, while sit in XY Described point records on millimeter paper, and 7 points are fitted using the approximating method of least square method, draw fit equation, at this time information Prompting frame shows that " fitting is completed!", by matched curve or fit equation, Maintenance Engineer can determine whether button intensity level and reality It is whether in a linear relationship between the output waveform amplitude of border." returning to test " button is clicked on, jumps back to main interface, or click on " failure Diagnosis " button, jumps to fault diagnosis interface.
At main interface or intensity linear fit interface, " fault diagnosis " button is clicked on, then jumps to fault diagnosis interface, can Diagnostic result is checked, referring to Figure 30 and Figure 31.If test passes through, each unit module text box shows prompting letter working properly Breath, while show bright green and " PASS " printed words, indicating fault is kermesinus;If test is not by trouble unit module Text box shows specific fault message, while the unit shows blackish green and " FAIL " printed words, and indicating fault is shiny red.Click on " returning to test " button, jumps back to main interface, or clicks on " fitting result " button, jumps to intensity linear fit interface.
If exiting the program, window is closed.
System is proved to be successful, and either basic data acquisition function or fault diagnosis functions can be realized preferably.

Claims (5)

  1. A kind of 1. equipment fault intelligent diagnostics device based on frock Yu LabVIEW data collection and analysis, it is characterised in that bag Include:Power supply (1), test fixture (2), interface board (4), capture card (5) and computer (6);
    The power supply (1) is powered by test fixture (2) for circuit board under test (3), while is also interface board (4) and capture card (5) power;
    The test fixture (2) is connected by interface board (4) with capture card (5);
    The interface board (4) expands signalling channel for capture card (5);
    The capture card (5) inputs various pumping signals by test fixture (2) for circuit board under test (3), and passes through serial side The response signal collected is sent in computer (6) by formula;
    The computer (6) realizes the generation of various pumping signals by programming, while the response signal of collection is carried out Pretreatment and characteristic parameter extraction, fault diagnosis is completed in conjunction with knowledge base and inference strategy;
    During test, circuit board under test (3) is placed on test fixture (2) by needle bed, which is equipped with more A test point, the needle bed are equipped with quantity and arrangement mode and the quantity and arrangement mode of test point on circuit board under test (3) The signal of test point, is transported on interface board (4) by identical probe by probe.
  2. 2. intelligent fault diagnosing device according to claim 1, it is characterised in that:The computer (6) includes:
    Repository unit, is split as multiple element circuits by circuit board under test according to function, determines the core of each element circuit Component, and determine each core component test point, using the pin name of test point, signal type and signal characteristic as The information source of knowledge base, the mapping that input with the output of each unit circuit are formed according to circuit under test partitioned signal observing and controlling principle are advised Then, knowledge base is established;
    Signal acquisition and processing unit, for obtaining the response letter of circuit board under test each test point output under different working condition Number, and the response signal of acquisition is pre-processed and characteristic parameter extraction;
    Inference machine unit, for formulating the detection principle of circuit board under test and the fault diagnosis rule of each unit circuit in board under test Then, and based on acquired response signal, according in the detection principle corresponding to the circuit board under test and circuit board under test The Failure Diagnostic Code of each unit circuit, and combine the failure diagnosis information that knowledge base content deduces board under test.
  3. A kind of 3. intelligent fault diagnosis method, it is characterised in that intelligent fault diagnosing device as claimed in claim 2 is used, Its method and step is:
    Step 1: computer utilizes the operating mode of the virtual circuit board under test of LabVIEW softwares;
    Step 2: under predetermined operating mode, capture card is gathered each under circuit board under test normal condition respectively by interface board The response signal of test point, and pretreatment and characteristic parameter extraction processing are carried out, establish standard database;
    Step 3: under predetermined operating mode, capture card is gathered each under circuit board under test malfunction respectively by interface board The response signal of test point, and pretreatment and characteristic parameter extraction processing are carried out, establish Mishap Database;
    Step 4: being compared using fault diagnosis software to standard and Mishap Database, speculate with the knowledge in knowledge base Go out the fault message of circuit board under test, complete fault diagnosis.
  4. 4. intelligent fault diagnosis method according to claim 3, it is characterised in that:In the step 4, for electricity to be measured Analog cell circuit in the plate of road, relatively and judges the mapping relations of its characteristic parameter, input terminal and output terminal, if by, The analog cell circuit is normal, if not by deducing the failure diagnosis information of the circuit board under test;For circuit board under test In digital units circuit, compare the response code of its output terminal, if by the way that measured number element circuit is normal, if obstructed Cross, then deduce the failure diagnosis information of the circuit board under test.
  5. 5. intelligent fault diagnosis method according to claim 4, it is characterised in that:The detection principle is:
    Detection ordering is from rear class element circuit to prime element circuit;Under certain operating mode, afterbody list is detected First circuit, if by the way that the circuit board under test is normal;If not by time rear stage element circuit being detected, until completing to all The detection of element circuit, exports diagnostic result.
CN201711310337.2A 2017-12-11 2017-12-11 Equipment fault intelligent diagnostics device and method based on frock Yu LabVIEW data collection and analysis Pending CN108020776A (en)

Priority Applications (1)

Application Number Priority Date Filing Date Title
CN201711310337.2A CN108020776A (en) 2017-12-11 2017-12-11 Equipment fault intelligent diagnostics device and method based on frock Yu LabVIEW data collection and analysis

Applications Claiming Priority (1)

Application Number Priority Date Filing Date Title
CN201711310337.2A CN108020776A (en) 2017-12-11 2017-12-11 Equipment fault intelligent diagnostics device and method based on frock Yu LabVIEW data collection and analysis

Publications (1)

Publication Number Publication Date
CN108020776A true CN108020776A (en) 2018-05-11

Family

ID=62073288

Family Applications (1)

Application Number Title Priority Date Filing Date
CN201711310337.2A Pending CN108020776A (en) 2017-12-11 2017-12-11 Equipment fault intelligent diagnostics device and method based on frock Yu LabVIEW data collection and analysis

Country Status (1)

Country Link
CN (1) CN108020776A (en)

Cited By (1)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
CN110967615A (en) * 2018-09-30 2020-04-07 鸿富锦精密电子(成都)有限公司 Circuit board fault diagnosis device and method

Citations (7)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
CN103063959A (en) * 2012-12-29 2013-04-24 北京德天泉机电设备有限公司 Bed-of-nails tool for detecting circuit board
CN203444010U (en) * 2013-07-24 2014-02-19 天津市申特电力电子厂 Detection tooling for single-phase intelligent electric meter circuit board
CN105223495A (en) * 2015-10-20 2016-01-06 国家电网公司 A kind of method of testing of the Analog-digital circuit fault diagnosis based on expert system
CN105302112A (en) * 2015-10-23 2016-02-03 中国电子科技集团公司第十研究所 Intelligent fault diagnosis system for ICNI system
CN105466453A (en) * 2015-11-19 2016-04-06 中国民用航空总局第二研究所 On-line monitoring system of navigation equipment and method thereof
CN106844775A (en) * 2017-03-02 2017-06-13 上海交通大学 Spacecraft malfunction rapid detection system
CN107450012A (en) * 2017-08-10 2017-12-08 薛雪东 A kind of circuit board repair identification systems

Patent Citations (7)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
CN103063959A (en) * 2012-12-29 2013-04-24 北京德天泉机电设备有限公司 Bed-of-nails tool for detecting circuit board
CN203444010U (en) * 2013-07-24 2014-02-19 天津市申特电力电子厂 Detection tooling for single-phase intelligent electric meter circuit board
CN105223495A (en) * 2015-10-20 2016-01-06 国家电网公司 A kind of method of testing of the Analog-digital circuit fault diagnosis based on expert system
CN105302112A (en) * 2015-10-23 2016-02-03 中国电子科技集团公司第十研究所 Intelligent fault diagnosis system for ICNI system
CN105466453A (en) * 2015-11-19 2016-04-06 中国民用航空总局第二研究所 On-line monitoring system of navigation equipment and method thereof
CN106844775A (en) * 2017-03-02 2017-06-13 上海交通大学 Spacecraft malfunction rapid detection system
CN107450012A (en) * 2017-08-10 2017-12-08 薛雪东 A kind of circuit board repair identification systems

Non-Patent Citations (1)

* Cited by examiner, † Cited by third party
Title
沈月伟: "基于LabVIEW的数字电路板板极自动测试系统的研制", 《中国优秀硕士学位论文全文数据库 信息科技辑》 *

Cited By (1)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
CN110967615A (en) * 2018-09-30 2020-04-07 鸿富锦精密电子(成都)有限公司 Circuit board fault diagnosis device and method

Similar Documents

Publication Publication Date Title
CN102092477B (en) Device and method for automatic test and fault diagnosis of plane audio integrated system
CN108226751B (en) System and method for evaluating performance of multi-processor cooperative chip
CN104849579B (en) Overcurrent protection and voltage monitor sensitive components test system and method
IE843021L (en) Automatic test equipment
CN104656015B (en) The desk-top test equipment of magnetic valve performance parameter
CN103019940B (en) A kind of electric energy meter embedded software half simulation testing device
CN107390110A (en) A kind of method, apparatus and system tested automatically PCBA
CN207851236U (en) A kind of chip testing plate and chip test system
CN107908507B (en) double-CPU multichannel FT (FT) mass production test system and method
CN105738836B (en) A kind of DC/DC converters automatization test system
CN106526457A (en) Circuit board detection instrument and system
CN108020776A (en) Equipment fault intelligent diagnostics device and method based on frock Yu LabVIEW data collection and analysis
CN101382575A (en) Auto testing system for electronic transformer
CN208818807U (en) Exit relay performance test apparatus and test macro
CN104391501B (en) A kind of condition monitoring system and method for Supervisory Computer Control System For Hydroelectic Power Plant
CN106895982A (en) Traction braking integrated test system for performance
CN103808999B (en) A kind of oscillograph with template test function
RU2324967C1 (en) Soft hardware stand for diagnostics of digital and microprocessor units
CN104571094B (en) Detection device for engine oil control system
CN208833886U (en) Electric tool switch test device and system
CN202421442U (en) Modularized open PCBA (Printed Circuit Board Assembly) functional circuit test (FCT) platform
CN108614217A (en) A kind of battery management system full-automatic test system and implementation method
CN101856224A (en) Electrocardio-electrode-based integrated digital testing system
CN102058430A (en) Automatic test equipment (ATE) of multi-parameter monitor and test method thereof
CN107966643A (en) The Interactive Visualization device and its implementation of a kind of real-time testing data

Legal Events

Date Code Title Description
PB01 Publication
PB01 Publication
SE01 Entry into force of request for substantive examination
SE01 Entry into force of request for substantive examination
TA01 Transfer of patent application right
TA01 Transfer of patent application right

Effective date of registration: 20210521

Address after: 401520 3rd floor, building 2, no.2808 Huayuan Road, Hechuan Industrial Park, Hechuan District, Chongqing

Applicant after: Chongqing Shengheng Medical Technology Co.,Ltd.

Applicant after: THE SECOND AFFILIATED HOSPITAL, ARMY MEDICAL University

Address before: 400037 No. 183 Xinqiao Zhengjie, Shapingba District, Chongqing

Applicant before: THE SECOND AFFILIATED HOSPITAL, ARMY MEDICAL University