CN109444709A - Wind turbines Design of Test System method based on virtual instrument technology - Google Patents
Wind turbines Design of Test System method based on virtual instrument technology Download PDFInfo
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- CN109444709A CN109444709A CN201811042006.XA CN201811042006A CN109444709A CN 109444709 A CN109444709 A CN 109444709A CN 201811042006 A CN201811042006 A CN 201811042006A CN 109444709 A CN109444709 A CN 109444709A
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- G—PHYSICS
- G01—MEASURING; TESTING
- G01R—MEASURING ELECTRIC VARIABLES; MEASURING MAGNETIC VARIABLES
- G01R31/00—Arrangements for testing electric properties; Arrangements for locating electric faults; Arrangements for electrical testing characterised by what is being tested not provided for elsewhere
- G01R31/28—Testing of electronic circuits, e.g. by signal tracer
- G01R31/2801—Testing of printed circuits, backplanes, motherboards, hybrid circuits or carriers for multichip packages [MCP]
- G01R31/281—Specific types of tests or tests for a specific type of fault, e.g. thermal mapping, shorts testing
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- Microelectronics & Electronic Packaging (AREA)
- General Engineering & Computer Science (AREA)
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- General Physics & Mathematics (AREA)
- Testing Of Devices, Machine Parts, Or Other Structures Thereof (AREA)
- Testing Electric Properties And Detecting Electric Faults (AREA)
Abstract
The Wind turbines Design of Test System method based on virtual instrument technology that the invention proposes a kind of.Wind turbines test macro based on virtual instrument technology includes hardware platform and software platform, and hardware platform includes built-in industrial control machine, data collecting card, terminal display screen, signal regulating panel, test needle bed, adaptable interface etc..Core of the software platform as Auto-Test System, based on virtual instrument technology, using NI LabVIEW as software development environment, using Theory of Fuzzy Comprehensive and Fault Tree Analysis as method for diagnosing faults, human-computer interaction interface and fault test interface are established, realizes the intelligent diagnostics to Wind turbines faulty circuit plate.For test macro mainly for all types of circuit boards of Wind turbines, design method is flexible in the present invention, can be applied to traditional field, the feature for having flexibility high, versatile.
Description
Technical field
The invention belongs to wind generating technologies, test in particular to a kind of Wind turbines based on virtual instrument technology
Design method.
Background technique
Common large scale wind unit has independent variable blade control system, when carrying out wind collecting, pitch control system
The function of system is that control blade rotation guarantees that Wind turbines Maximum Power Output, or control shut down and guarantee safety.And variable pitch control
There are a variety of circuit board co-ordinations in system processed, once breaking down, Wind turbines direct requirement enters shutdown status.O&M
When be also directly to renew to circuit board, effectively fault diagnosis can not be carried out.
Auto-Test System is mainly used in military radar digital circuit board testing field, civilian Auto-Test System at present
It is still in developing stage, is chiefly used in the Fault Diagnosis of Circuit Board in traditional industry field.For Wind turbines variable blade control system
Still in its infancy, means of testing is also to be taken time and effort in terms of O&M, nothing based on semi-automatic test to Fault Diagnosis of Circuit Board
Method forms effective earth fault test.Therefore introducing Auto-Test System and being tested variable blade control system faulty circuit plate has very much
It is necessary.
Summary of the invention
It is an object of the invention to propose the Wind turbines Design of Test System method based on virtual instrument technology.
Realize technical solution of the invention are as follows: the Wind turbines Design of Test System side based on virtual instrument technology
Method, specific steps are as follows:
Step 1 is directed to Wind turbines variable blade control system, according to existing wind power plant O&M situation, selectes in " blue box "
PMPC circuit board forms board failure comparison database by studying PMPC working principle as example test object；
Step 2, the hardware platform for carrying out Wind turbines test macro are built；
Step 3, the software platform for carrying out Wind turbines test macro are built, the Wind turbines testing system software platform
Including human-computer interaction interface and fault diagnosis interface, human-computer interaction interface is used to record the data of each fault diagnosis to back up
And fault diagnosis interface is called；Collected voltage signal is carried out width using method for diagnosing faults by fault diagnosis interface
It is compared and analyzed after value amendment with the data of board failure comparison database, judges that position occurs for failure by threshold value delimitation.
Preferably, the Wind turbines test system hardware platform includes embedded computer, data collecting card, terminal circle
Face, signal regulating panel, test needle bed and adaptable interface, circuit-under-test plate are connect by adaptable interface with signal regulating panel, are surveyed
Test point bed is connected by testing probe with circuit-under-test plate, transmits signals to signal regulating panel, signal regulating panel transmits signals to
Data collecting card, embedded computer are communicated with data collecting card and control data collecting card work, embedded computer
It is connect with terminal interface and carries out human-computer interaction
Preferably, the signal regulating panel includes resistor voltage divider circuit and circuit linearity insulating circuit, the resistor voltage divider circuit
The amplitude of input voltage is reduced for connecting by resistance, to guarantee to meet the input voltage range requirement of data collecting card；
The circuit linearity insulating circuit is used to carry out input signal isolation by linear optical coupling and amplifier, guarantees Back end data capture card and embedding
Enter the work safety of formula computer.
Compared with prior art, the present invention its remarkable advantage are as follows: Auto-Test System is introduced Wind turbines and become by the present invention
In blade control system Fault Diagnosis of Circuit Board, it is capable of forming the unified theory of testing and process, thus to Fault Diagnosis of Circuit Board
The operation of Shi Jinhang procedure, greatly improves working efficiency, while when such circuit board breaks down all is handled with update, by from
Dynamic test can effectively increase the service life of circuit board, greatly reduce O&M cost.
Further detailed description is done to the present invention with reference to the accompanying drawing.
Detailed description of the invention
Fig. 1 is Wind turbines test system structure schematic diagram in the present invention；
Fig. 2 is signal regulating panel resistor voltage divider circuit schematic diagram in the present invention；
Fig. 3 is that circuit board M1-M4 influences each other relational graph in embodiment 1；
Fig. 4 is circuit board voltage stabilizing circuit module fault tree models in embodiment 1；
Fig. 5 is fault diagnosis test program flow chart in embodiment 1.
Specific embodiment
Wind turbines Design of Test System method based on virtual instrument technology, specific steps are as follows:
Step 1 is directed to Wind turbines variable blade control system, and according to existing wind power plant O&M situation, electric fault is general
Occur in circuit board failure of removal, it is especially especially frequent with " blue box " failure, and it can not effectively be repaired recycling,
It can only carry out renewing processing, so that PMPC is former by research circuit board work as example test object in selected " blue box "
Reason forms board failure comparison database, determines that failure is prepared for the comparison of actual test data below.
Step 2, the hardware platform for carrying out Wind turbines test macro are built, and the Wind turbines test macro includes insertion
Formula computer 1, data collecting card 2, terminal interface 3, signal regulating panel 4, test needle bed 5 and adaptable interface 6, embedding assembly
Machine 1 by PCI expansion interface communicated with data collecting card 2 and control data collecting card 2 work, embedded computer 1 and
Terminal interface 3 carries out communication control test program by DVI-I connecting line and carries out human-computer interaction, and adaptable interface 6 passes through plug
Formula interface connects circuit-under-test plate and signal regulating panel 4, and test needle bed 5 is connected with circuit-under-test plate by testing probe, is passed through
Connecting line transmits signals to signal regulating panel 4, and signal regulating panel 4 transmits signals to data collecting card 2 by patchcord, and data are adopted
Truck 2 is acquired and handles.
Step 3, the software platform for carrying out Wind turbines test macro are built, the Wind turbines testing system software platform
Software development environment using virtual instrument NI LabVIEW as test program set, test program set include human-computer interaction interface
With fault diagnosis interface, fault diagnosis interface includes PMPC test interface and M1-M4 Diagnostics Interfaces.Human-computer interaction interface is for remembering
It records each side's face data of each fault diagnosis and is backed up with making and fault diagnosis interface is called；Fault diagnosis interface utilizes event
Collected voltage signal is carried out after amplitude correction comparing with the data of board failure comparison database point by barrier diagnostic method
Analysis judges that position occurs for failure by threshold value delimitation.
In some embodiments, method for diagnosing faults in step 3 specifically: by studying circuit board working principle diagram, establish
Failure cause collection M=(M1, M2, M3, L, Mn), then failure cause fuzzy vector is m=(um1,um2,um3,L,umn), m is diagnosis
The corresponding degree of membership of object outages reason collection M；
The matrix that note failure cause interacts are as follows:
In formula, rijIndicate that i-th kind of failure cause to the influence relationship factor of jth kind failure cause, meets rij=0 or
1；
Meanwhile remembering that the weight factor collection of failure cause isBy M when board failure
The weight factor of i kind failure cause is denoted as:
Wherein,For the influence relationship factor summation of i-th kind of failure cause,Indicate i-th kind of failure cause to
The influence relationship factor summation of j kind failure cause.
Embodiment 1
As shown in Figure 1, the Wind turbines test macro based on virtual instrument technology designed through the invention, including terminal
Interface, embedded computer, data collecting card, signal regulating panel, needle bed, adaptable interface etc..Embedded computer 1 passes through PCI
Expansion interface is communicated with data collecting card 2 and is controlled the work of data collecting card 2, and embedded computer 1 and terminal interface 3 are logical
It crosses DVI-I connecting line to carry out communication control test program and carry out human-computer interaction, adaptable interface 6 connects quilt by plug-in interface
Slowdown monitoring circuit plate and signal regulating panel 4, test needle bed 5 are connected with circuit-under-test plate by testing probe, are transmitted and believed by connecting line
Number signal regulating panel 4 is arrived, signal regulating panel 4 transmits signals to data collecting card 2 by patchcord, and data collecting card 2 is adopted
Collect and handles.Terminal interface is used as human-computer interaction interface, is mainly used for actual test personnel and is carried out test operation.Data are adopted
Truck is communicated by pci interface with embedded computer, so that operator passes through terminal control data collecting card
Work.The simulation input port of data collecting card and output port are connected to the external good outside of formation by patchcord and connect
Mouthful, it ensure that good plug performance.
Signal regulating panel is divided into resistor voltage divider circuit and circuit linearity insulating circuit.Resistor voltage divider circuit (is missed using graticule resistance
Rate is 2%), including 20K and 10K, to carry out 1/3 electric resistance partial pressure, as shown in Figure 2.Specific formula is as follows:
U1For the voltage after partial pressure, U is collected input voltage, R1,R2For concatenated resistance, R2=2R1。
Circuit linearity insulating circuit uses HCNR201 high-speed linear optocoupler as main element, and includes far to put LMV321, electricity
Resistance and the linear isolation circuit of capacitance group, front end input signal are isolated with rear end output signal, thus after reaching protection
The effect of end equipment.
Test needle bed is to acquire designed by signal in real time, and the present embodiment is used with test circuit board with size
Transparent acrylic is as test needle bed, and test probe uses three foot probes, preferably to contact with test fingers.It determines first
It after the circuit board test point of secondary test, is carried out on acrylic board and tests the matched drilling operation of probe size, to will survey
It sounds out needle and is fixed on formation test needle bed on acrylic board, then pass through the extraction of Du Pont's line and signal regulating panel input signal interface phase
Even, signal sampling channel is formed.
Plug-in adaptable interface, when obtaining example test object, is being surveyed for analog circuit board actual working environment
Need to analyze its required working signal before examination, test object PMPC there are 14 needle interfaces an of nonstandardized technique, and the present invention passes through 3D
Printing technique has made adaptable interface, is to carry out size to interface to determine, then be designed and build by Solidworks first
Mould forms 3D model, then is connected to form standardization with Du Pont line by 3D printing technique production entity, and by aluminum terminal
Adaptable interface, be connected to power interface, achieve the purpose that simulate actual working environment.
These hardware devices are connected by connecting line, then hardware platform builds completion, it is only necessary to be grasped by software
Test request can be completed.
As shown in figure 3, influencing each other relationship acquisition respectively by each circuit board functional module when carrying out PMPC preliminary test
Functional module for board failure degree of membership, so that the malfunctioning module that can carry out priority in preliminary test is intelligently examined
It is disconnected, to more quickly find failure cause.In the present embodiment, specifically:
According to each circuit module function of test object PMPC and connection, M1, M2, M3, M4 are established, wherein M1 is driving
Fault；M2 is voltage regulator circuit failure；M3 is start-up circuit failure；M4 is power supply circuit failure, these four failure causes
Influence each other relational graph, obtains the relational matrix that influences each other of failure cause are as follows:
From above formula matrix, the weight factor for obtaining failure cause integrates as P1=(0.1,0.3,0.2,0.4)；
In Digital Analog Hybrid Circuits, since digital circuit is mainly made of digital IC, integrated level is high, digital circuit operation
When high reliablity.And generally comprising that power is big in analog circuit, instantaneous voltage or the big circuit structure of electric current, fever is serious and leads
The high temperature of cause is easy so that component damage, leads to fault.Root is the data shows that there is 80% failure hair in fault
In analog circuit, only 20% failure can occur in digital circuit for life.
According to the circuit board working principle diagram of existing manual test, it is known that power supply circuit module is directly connected to power supply, belongs to
The circuit structure most easily to break down, other circuits are based on integrated chip, high reliablity, therefore by this component indigenous fault probability
Set representations are (0.2,0.2,0.2.0.8), the weight factor collection of failure cause are as follows:
So the weight factor collection of failure cause is
The fuzzy vector of failure cause, i.e., degree of membership when each failure cause is for board failure can be obtained are as follows:
M=(um1,um2,um3,um4)=(0.12,0.22,0.17,0.49)
According to Theory of Fuzzy Comprehensive, a possibility that degree of membership is higher, and most probable leads to board failure, is bigger, therefore therefore
Barrier diagnositc decision priority is followed successively by M4, M2, M3, M1.
As shown in Figure 4 and Figure 5, when test enters the test of functional module grade, the fault tree models of test object are established, from
And fault diagnosis is set gradually to carry out to achieve the purpose that complete to determine abort situation.According to Fig. 1, data collecting card passes through PCI
Interface is communicated with embedded computer, and embedded computer develops correspondingly VI program by NILabVIEW and reaches letter
Number acquisition read and amendment, and realize control to data collecting card.Virtual instrument, that is, NI LabVIEW program module is
One computer based data collection system according to instrument demand tissue, and can define and manufacture according to user demand and is each
Kind instrument.
Before establishing board failure tree-model, the working principle of test object is understood in depth, establish the event of comparatively perfect
Hinder tree-model.
As shown in figure 5, test terminal includes human-computer interaction interface and fault diagnosis interface.The main part of human-computer interaction interface
Dividing is the selection of test object and the generation of testing journal sheet, and test object selects correspondingly call the failure of this test object
Diagnostics Interfaces；Time when testing journal sheet's essential record is tested, temperature, the information such as tester simultaneously generate document storing.
Fault diagnosis interface is divided into the multi-level interface VI, and fault test needs substep to carry out as can be seen from FIG. 5, which is judging
Further test is needed when part is broken down, therefore VI program need to jump into correspondingly test interface, so as to continue deeper into
Fault diagnosis, until searching out determining abort situation.
When VI program is run, connection is established with data collecting card first, then data collecting card is initialized, it can root
The operating mode of data collecting card is set on program interface according to demand, and then data collecting card is started to work, and is carried out data and is adopted
Collection.
Data collecting card continuous collecting voltage signal at work, carries out amplitude correction to it after reading, is restored to it
Then real input signal is compared using the threshold range independently set, determine failure when occurring beyond threshold value.
Then next step fault diagnosis is carried out, more local fault test is carried out, position occurs until finding accurate earth fault
It sets, saves test data.
Claims (3)
1. a kind of Wind turbines Design of Test System method based on virtual instrument technology, which is characterized in that specific steps are as follows:
Step 1 is directed to Wind turbines variable blade control system, according to existing wind power plant O&M situation, selectes PMPC in " blue box "
Circuit board forms board failure comparison database by studying PMPC working principle as example test object；
Step 2, the hardware platform for carrying out Wind turbines test macro are built；
Step 3, the software platform for carrying out Wind turbines test macro are built, and the Wind turbines testing system software platform includes
Human-computer interaction interface and fault diagnosis interface, human-computer interaction interface are used to record the data of each fault diagnosis to make backup and right
Fault diagnosis interface is called；Collected voltage signal progress amplitude is repaired using method for diagnosing faults at fault diagnosis interface
It is compared and analyzed after just with the data of board failure comparison database, judges that position occurs for failure by threshold value delimitation.
2. the Wind turbines Design of Test System method according to claim 1 based on virtual instrument technology, feature exist
In, the Wind turbines test system hardware platform include embedded computer (1), data collecting card (2), terminal interface (3),
Signal regulating panel (4), test needle bed (5) and adaptable interface (6), circuit-under-test plate pass through adaptable interface (6) and signal condition
Plate (4) connection, test needle bed (5) are connected with circuit-under-test plate by testing probe, are transmitted signals to signal regulating panel (4), believed
Number conditioning plate (4) transmits signals to data collecting card (2), and embedded computer (1) is communicated and controlled with data collecting card (2)
Data collecting card (2) work processed, embedded computer (1) is connect with terminal interface (3) carries out human-computer interaction.
3. the Wind turbines Design of Test System method according to claim 1 based on virtual instrument technology, feature exist
In the signal regulating panel (2) includes resistor voltage divider circuit and circuit linearity insulating circuit, and the resistor voltage divider circuit is for passing through electricity
Resistance connects to reduce the amplitude of input voltage, to guarantee the input voltage range requirement for meeting data collecting card (2)；It is described linear
Isolation circuit is used to carry out input signal isolation by linear optical coupling and amplifier, guarantees Back end data capture card (2) and embedded
The work safety of computer (1).
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