CN106969828B - A kind of steam turbine watt vibration sensor fault diagnosis and channel check system and method - Google Patents
A kind of steam turbine watt vibration sensor fault diagnosis and channel check system and method Download PDFInfo
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- CN106969828B CN106969828B CN201710254497.3A CN201710254497A CN106969828B CN 106969828 B CN106969828 B CN 106969828B CN 201710254497 A CN201710254497 A CN 201710254497A CN 106969828 B CN106969828 B CN 106969828B
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- G—PHYSICS
- G01—MEASURING; TESTING
- G01H—MEASUREMENT OF MECHANICAL VIBRATIONS OR ULTRASONIC, SONIC OR INFRASONIC WAVES
- G01H17/00—Measuring mechanical vibrations or ultrasonic, sonic or infrasonic waves, not provided for in the preceding groups
Abstract
The invention discloses a kind of steam turbine watt vibration sensor fault diagnosis and channel check system and method, which includes: junction box, has multiple signal paths, watt vibration sensor is connected, for receiving and transmitting the detection signal of watt vibration sensor；Channel tester, connect with junction box, for verifying to sensor passage；Shake table, and a watt vibration sensor are fixed, for providing vibration source to watt vibration sensor after sensor passage verification is qualified；Fault diagnosis device, connect with shake table and junction box respectively, the standard vibration signal of the detection signal and shake table of watt vibration sensor for receiving junction box's transmission, inline diagnosis watt vibration sensor failure.The present invention also provides a kind of steam turbine watt vibration sensor fault diagnosis and channel methods of calibration.The present invention solves the problems, such as that current watt of vibration sensor fault diagnosis and channel verification are existing longer without the condition and period for carrying out active vibration detection to sensor.
Description
Technical field
The present invention relates to fault detection and field of measuring technique more particularly to a kind of steam turbine watt vibration sensor fault diagnosises
And channel check system and method.
Background technique
Steam turbine watt vibration sensor is the vibration values for measuring bearing seat of steam turbine, generally with the bearing block of supporting rotor
The peak-to-peak value of vibration is as vibration values.Steam turbine watt vibration value is steam turbine starting, the important operation ginseng for running, monitoring in stopping process
Number, one of the parameter that some producers protect its numerical value as steam turbine chaser, but also can provide and suggest beating lock value manually.By
It is mounted on bearing seat of steam turbine in steam turbine watt vibration sensor, is chronically at the running environment of high temperature and vibration, breaks down
Probability it is larger, the state of timely diagnostic sensor is needed when unit vibration exception and carries out accident analysis, for correct processing
Steam Turbine operating parameter provides important foundation extremely, and the reliability of watt vibration data is related to the safety of steam turbine, watt
Safety when the reliability diagnosis and shutdown of data of shaking to watt rapid verification in vibration sensor channel, to Steam Turbine is ensured
It has great significance.
General letter is generally used for the verification of μ A, mV grades small signal acceleration-type watt vibration sensor channel currently on the market
Number generator and other components build electric loop, generate μ A, the mV signal of band biasing, and commission profession is mostly used to examine and determine
A watt vibration sensor is examined and determine by mechanism, generally the trial inspection without scene and verification；It is examined for a watt vibration sensor failure
The disconnected general signal pickup assembly for using vibrating sensor judges steam turbine by modes such as spectrum analyses to sensor
State, and judgement generally is compared by the way of replacement for the judgement of sensor itself, formal verification generally requires
The verification agency of profession is sent to carry out.
The small signal source for the generic function generator that the prior art uses has the shortcomings that stability is poor, precision is low, uses
It is very poor that the technical solution carries out channel verification reliability, and precision is extremely difficult to require, and needs oneself to build electric loop, can
It is worse by property, it is difficult to meet the requirement of test；To sensor breakdown judge itself, not the dedicated unit of on-line fault diagnosis and
Software application does not set up sensor fault expert database, can not quickly provide diagnostic assistance according to fault signature；Due to lacking
The judgement of the field-checking of vibration source and standard transducer cannot exclude the sensor of replacement itself using replacement approach sensor
Erroneous judgement caused by failure, can not the fault type to sensor accurately positioned.The verification agency of profession is sent to carry out just
Formula verification, since the period is longer, is unable to satisfy urgent requirement of the troubleshooting hesitation to the time.
Summary of the invention
The technical problem to be solved by the embodiment of the invention is that in view of the above-mentioned defects in the prior art, providing a kind of vapour
Turbine watt vibration sensor fault diagnosis and channel check system and method.
In order to solve the above-mentioned technical problem, the embodiment of the invention provides a kind of steam turbine watt vibration sensor fault diagnosis and
Channel check system, comprising:
Junction box has multiple signal paths, connect when watt vibration sensor is operated normally with described watt of vibration sensor, uses
In receiving and transmit the detection signal issued when the operation of watt vibration sensor；
Controller is connect with the junction box, and the signal path for controlling the junction box is switched on or switched off；
Channel tester is connect with the controller, is connect, is used for the junction box under the control of the controller
Multiple checking signals are provided to verify sensor passage；
Shake table connect with the controller and fixes with a watt vibration sensor, under the control of the controller to
Watt vibration sensor provides vibration source, is simultaneously emitted by standard vibration signal；
Fault diagnosis device is connect with the shake table, the junction box and the controller respectively, in a watt vibration sensing
Device receives the detection signal of watt vibration sensor of junction box's transmission and the standard vibration letter of the shake table when operating normally
Number, watt vibration sensor failure described in inline diagnosis.
Preferably, the controller is used to disconnect the junction box and the channel school when watt vibration sensor operates normally
It tests the connection between instrument and connects the connection between the junction box and Wa vibration sensor；The controller is also used to led to
Road disconnects the connection between the junction box and watt vibration sensor and connects the junction box and the channel tester when verifying
Between connection.
Preferably, the controller is also used to control the shake table vibration simultaneously after the sensor passage verifies qualification
Control the fault diagnosis device operation.
Preferably, the shake table includes:
Stage body is vibrated, for providing vibration source and issuing itself standard vibration signal；
Fixing clamp is fixedly connected, for making watt vibration sensor with described respectively with the vibration stage body and a watt vibration sensor
Vibration stage body vibrates together；
Standard probe is connect, for transmitting the standard vibration respectively with the vibration stage body and the fault diagnosis device
Signal is to the fault diagnosis device.
Preferably, the fault diagnosis device includes:
Wiring control module is connect with the standard probe and the junction box respectively, for transmitting from the junction box
Watt vibration sensor detection signal and the standard probe transmitting standard vibration signal；
Failure analysis module is connect with the wiring control module, for the detection signal and standard based on the received
Vibration signal analyzes the failure of watt vibration sensor；
Display module is connect with the wiring control module and the failure analysis module respectively, for showing measurement knot
Fruit, vibrational waveform and analysis result.
Preferably, the wiring control module includes that several control the failure analysis module and display module fortune
The control key of row operation, several voltage and current input interfaces and several USB and communication interface.
Preferably, the controller is connected by the USB interface with the wiring control module, and the controller is also used
In the operation operation for controlling the failure analysis module and the display module.
Preferably, the failure analysis module further include:
Database module establishes a watt expert database for vibration sensor fault diagnosis using failure mode set；
Analysis module is connect with the wiring control module and the database module respectively, for institute based on the received
Detection signal and standard vibration signal are stated, by being compared with the database in the database module, is based on using icon generation
For the LABVIEW graphical programming language of line of text creation application program, using data flow programming mode to watt vibration sensor
Failure is analyzed.
Preferably, the channel tester is used to generate the signal of μ A, mV grades of small signal acceleration-type watt vibration sensors
Source verifies sensor passage.
The present invention also provides a kind of steam turbine watt vibration sensor fault diagnosis and channel methods of calibration, including walk as follows
It is rapid:
S1, connection channel tester and junction box, the channel tester are verified, and channel verification is qualified to carry out step
S3, channel verification is unqualified, carries out step S2；
S2, channel failure is analyzed according to the check results of channel tester and is repaired to channel verification qualification
Afterwards, step S3 is carried out；
S3, shake table and watt vibration sensor are fixedly connected with, by the junction box respectively with watt vibration sensor and fault diagnosis
Device connection controls the shake table and issues standard vibration signal and transmit the standard vibration signal to fault diagnosis device, watt vibration
Sensor passes detect signal to the junction box；
The mark for detecting signal and the shake table for watt vibration sensor that S4, the fault diagnosis device are transmitted according to junction box
Quasi- vibration signal, watt vibration sensor failure described in inline diagnosis.
Preferably, the step S4 further include:
S41, the expert database that watt vibration sensor fault diagnosis is established using failure mode set；
S42, the received detection signal and standard vibration signal, by being compared with the database, based on use
Icon replaces the LABVIEW graphical programming language of line of text creation application program, is passed using data flow programming mode to a watt vibration
The failure of sensor is analyzed；
Preferably, channel tester described in the step S1 is by generating μ A, the vibration of mV grades small signal acceleration-type watt
The signal source of sensor verifies sensor passage.
One or more technical solutions that the present invention program provides, have at least the following technical effects or advantages:
In the present invention program, by developing a set of portable turbine watt vibration sensor fault diagnosis and channel verification dress
It sets, the needs of vibrating sensor fault diagnosis and field channels verification when can satisfy unit vibration exception, it can be widely
It is unit maintenance personnel applied to the verification of domestic conventional thermal power unit, nuclear power unit watt vibration sensor fault diagnosis and channel
The means of watt vibration sensor inline diagnosis are provided, quickly judge the availability in channel, shorten the repair time, reduce unit mistakenly stop machine
Number improves the safety and economy of unit.
Detailed description of the invention
To describe the technical solutions in the embodiments of the present invention more clearly, make required in being described below to embodiment
Attached drawing is briefly described, it should be apparent that, drawings in the following description are only some embodiments of the invention, for
For those of ordinary skill in the art, without creative efforts, it can also be obtained according to these attached drawings other
Attached drawing.
Fig. 1 is the steam turbine watt vibration sensor fault diagnosis and channel check system structure that first embodiment of the invention provides
Schematic diagram；
Fig. 2 is the shake table structure chart that first embodiment of the invention provides；
Fig. 3 is the stream of the steam turbine watt vibration sensor fault diagnosis that second embodiment of the invention provides and channel testing arrangement
Cheng Tu.
Specific embodiment
The embodiment of the present invention by providing a kind of steam turbine watt vibration sensor fault diagnosis and channel testing arrangement and method,
When solving vibration acquisition channel precision checking existing in the prior art, interference of μ A, the mV grades of small pickup electrodes vulnerable to the external world,
Scene does not have the condition that active vibration detection is carried out to sensor generally, not the dedicated unit and software of on-line fault diagnosis
Using, sensor fault expert database is not set up, can not quickly provide diagnostic assistance according to fault signature, it can not be to sensor
Fault type accurately positioned, and the verification agency of profession is sent formally to be verified, the period is longer to be unable to satisfy failure
Hesitation is handled to urgent the problem of requiring of time, by developing a kind of portable turbine watt vibration sensor fault diagnosis
And channel testing arrangement and method, vibrating sensor fault diagnosis and field channels verification when can satisfy unit vibration exception
It needs, it can be widely applied to the school of domestic conventional thermal power unit, nuclear power unit watt vibration sensor fault diagnosis and channel
It tests, provides a watt means for vibration sensor inline diagnosis for unit maintenance personnel, quickly judge the availability in channel, when shortening maintenance
Between, it reduces unit and misses machine stop times, improve the safety and economy of unit.
To make the object, technical solutions and advantages of the present invention clearer, below in conjunction with attached drawing to embodiment party of the present invention
Formula is described in further detail.
Embodiment one
Referring to Figure 1, Fig. 1 is steam turbine watt vibration sensor fault diagnosis and the channel of first embodiment provided by the invention
Check system structural schematic diagram has multiple signal paths it can be seen from the figure that the system includes: junction box 1, in a watt vibration
Sensor is connect when operating normally with described watt of vibration sensor, for receiving and transmitting the detection issued when watt vibration sensor is run
Signal；Controller 2 is connect with the junction box 1, and the signal path for controlling the junction box 1 is switched on or switched off；Channel school
Instrument 3 is tested, is connect with the controller 2, is connect under the control of the controller 2 with the junction box 1, for providing multiple schools
Signal is tested to verify sensor passage；Shake table 4 connect with the controller 2 and fixes with a watt vibration sensor, is used for
Vibration source is provided to watt vibration sensor under the control of the controller 2, is simultaneously emitted by standard vibration signal；Fault diagnosis device 5, point
It is not connect with the shake table 4, the junction box 1 and the controller 2, for receiving institute when watt vibration sensor operates normally
The standard vibration signal for stating the detection signal and the shake table 4 of watt vibration sensor of the transmission of junction box 1, described in inline diagnosis watt
Vibration sensor failure.
Specifically, when watt vibration sensor operates normally, controller 2 disconnects the junction box 1 and the channel tester 3
Between connection and connect the connection between the junction box 1 and watt vibration sensor；When carrying out channel verification, the controller
2 disconnect the connection between the junction box 1 and watt vibration sensor and connect between the junction box 1 and the channel tester 3
Connection.After channel verification is qualified, watt vibration sensor is operated normally, and controller 2 disconnects the junction box 1 and the channel school
The connection tested between instrument 3 simultaneously connects the connection between the junction box 1 and watt vibration sensor, and controls the fault diagnosis device 5
Operation starts to carry out fault diagnosis.
In the present embodiment, the channel tester shares 4 tunnel sensor Simulation output channels, and each channel can independent mould
Quasi- current vortex, magnetoelectricity, inertia, ICP, reluctive transducer, by 4 tunnel sensor Simulation output channels of channel tester respectively with
Junction box's connection, channel tester output simulation watt vibration sensor signal, such as speed signal, the acceleration signal of watt vibration, operation
The physical index and figure that can show generation later join the standard stored in obtained parameter and figure and channel tester
Number is compared and automatically corrects with figure.Channel tester in the present embodiment can verify measuring instrumentss vibration (displacement,
Speed, acceleration), bias, the input channels such as revolving speed, and μ A, mV grades of small signal acceleration-type watt vibration sensors can be generated
Signal source, meet the needs of μ A, mV grades of small signal acceleration-type watt vibration sensor channels verification.
Specifically, referring to figs. 1 and 2, the shake table 4 includes: vibration stage body 41, concurrent for providing vibration source
The standard vibration signal of itself out；Fixing clamp 42 is fixedly connected, for making respectively with the vibration stage body 41 and a watt vibration sensor
Watt vibration sensor vibrates together with the vibration stage body 41；Standard probe 43, respectively with the vibration stage body 41 and the failure
Diagnostor 5 connects, for transmitting the standard vibration signal to the fault diagnosis device 5.Using fixing clamp 42, in detection watt vibration
When standard vibration signal is provided during sensor fault, do not need watt vibration sensor under bearing seat of steam turbine disassembly
Come, a watt means for vibration sensor inline diagnosis can be provided for unit maintenance personnel, shorten the repair time, reduces unit mistakenly stop machine
Number improves the safety and economy of unit.
As shown in Figure 1, the fault diagnosis device 5 includes: wiring control module 51, respectively with the standard probe 43 and institute
State the connection of junction box 1, detection signal and the standard probe 43 transmitting of watt vibration sensor for transmitting from the junction box 1
Standard vibration signal；Failure analysis module 52 is connect with the wiring control module 51, is used for the detection based on the received
Signal and standard vibration signal analyze the failure of watt vibration sensor；Display module 53 controls mould with the wiring respectively
Block 51 and the failure analysis module 52 connect, for showing measurement result, vibrational waveform and analysis result.
Specifically, the wiring control module 51 includes a control failure analysis module 52 and the display module
The control key of 53 operation operations, six voltage input interfaces, six electric current input interfaces and two USB interfaces and one it is logical
Communication interface.
In the present embodiment, the controller 2 is externally connected portable formula notebook, passes through the USB interface and the wiring
Control module 51 connects, and the control Wiring module 51 can control the failure analysis module 52 and the display module 53
Operation and operation, the controller 2 also can control the operation operation of the failure analysis module 52 and the display module 53,
It simultaneously can also be with the display module 53 equally display display measurement result, vibrational waveform and analysis result.Using portable
Notebook controls fault diagnosis device 5 convenient for operation, and display screen of laptop curtain is more convenient observation, records and prints display measurement
As a result, vibrational waveform and analysis result.Fault diagnosis device 5 in the embodiment of the present invention can continuously record, save and show 1
Historical data more than it uses hardwire mode with access is devices under, and the connection of test cable and experimental rig is mark
Quasi- BNC connector, analog signals error should be less than 0.2%FS, and experimental rig signal sampling and display time should be less than 5ms.
Specifically, the failure analysis module 52 further include: database module 521 is established watt using failure mode set
The expert database of vibration sensor fault diagnosis；Analysis module 522, respectively at the wiring control module 51 and the database
Module 521 connects, for the detection signal and standard vibration signal based on the received, by with the database module 521
In database be compared, based on icon replace line of text creation application program LABVIEW graphical programming language,
LABVIEW is a kind of graphical programming language that line of text creation application program is replaced with icon, using data flow programming mode,
What the data flow between program chart interior joint determined VI and function executes sequence.VI refers to virtual instrument, is LABVIEW
Program module.
Wherein, watt vibration sensor fault diagnosis is divided into Eddy Current Type according to sensor different type first, piezoelectricity accelerates
Then degree type and three kinds of magnetoelectricity velocity profile establish as complete as possible " fault set " to each type of sensor and (are similar to expert
Library), " fault set " is stored in database module 521.
Specifically, shake table 4 is transmitted to again by 43 transmission standard vibration signal of standard probe to wiring control module 51
Analysis module 522, a watt vibration sensor sending vibration signal are transferred to junction box 1 and are transmitted to wiring control module 51 and analysis mould again
Block 522, while " fault set " is transmitted to analysis module 522 by database module 521, analysis module 522 is described based on the received
Detection signal and standard vibration signal are compared with fault set, ultimately produce fault diagnosis result and report, then by measurement result
Controller 2, i.e. portable notebook are transferred to by USB interface.
Specifically, fault diagnosis diagnoses in two ways, the first is " Basic examination and judgement " project, main purpose
It is by quickly determining simple fault, providing conclusion to some simple, apparent, obvious inspections and judgement；Second
Kind is the project of " signal through sensor detection signal analyzes result to judge ", including " analysis of amplitude domain signal ", " time-domain
Signal analysis ", " frequency domain signal analysis " three kinds of analysis means, to obtain more complicated fault diagnosis result, such as one
A little combined faults.
On the basis of " fault set ", use two kinds of diagnosis and inference schemes: the first is " through Basic examination and judgement
Determine failure cause ", i.e., several failures that are basic, being easy to macroscopic examination are shown on interface, user technical staff is directly logical
It crosses the mode chosen and determines failure cause as far as possible；It wants more complex second, referred to as " comes through the analysis of sensor monitoring signals true
Fixed failure " " passes through signal analyzing and diagnosing failure ", and main points are: most of complex fault can not be straight by visual examination
Determination is connect, but these failures can all leave some feature hints, and the faulty figure of institute in amplitude domain, time-domain or frequency domain
Shape can be classified as limited tens kinds of graphic features performance.Amplitude domain figure, time-domain figure are provided on system interface
And spectrogram, and a variety of graphic features are set out, system enumerates 24 kinds of different graphic features in the present embodiment, corresponds to width
Codomain, time-domain and each 8 kinds of frequency domain, user technical staff are chosen corresponding by observing these figures after simply judging
Graphic feature, then, software can according to the fault search of backstage setting with match engine, find and choose the failure to match
Combination, further confirms that failure for technical staff.Pass through the steam turbine watt vibration sensor on-line fault diagnosis and channel verification dress
The application set, to guarantee that steam turbine normal operation provides important evidence.
Embodiment two
As shown in connection with fig. 3, second embodiment of the present invention provides a kind of steam turbine watt vibration sensor fault diagnosis and channel schools
Proved recipe method, includes the following steps:
S1, connection channel tester 3 and junction box 1, the channel tester 3 are verified, and channel verification is qualified to be carried out
Step S3, channel verification is unqualified, carries out step S2；
S2, channel failure is analyzed according to the check results of channel tester 3 and repairs to channel to verify and is closed
After lattice, step S3 is carried out；
S3, it is fixedly connected with shake table 4 and watt vibration sensor, the junction box 1 is examined with watt vibration sensor and failure respectively
Disconnected device 5 connects, and controls the shake table 4 and issues standard vibration signal and transmit the standard vibration signal to fault diagnosis device 5,
Watt vibration sensor transmitting detection signal is to the junction box 1；
The detection signal and the shake table 4 for watt vibration sensor that S4, the fault diagnosis device 5 are transmitted according to junction box 1
Standard vibration signal, watt vibration sensor failure described in inline diagnosis.
Specifically, in step sl, when carrying out channel verification, the junction box 1 is disconnected by controller 2 and is passed with a watt vibration
Connection between sensor simultaneously connects the connection between the junction box 1 and the channel tester 3；In step s3 in the biography
Controller 2 disconnects the junction box 1 and the channel tester 3 when watt vibration sensor operates normally after the verification of sensor channel is qualified
Between connection and connect the connection between the junction box 1 and watt vibration sensor, and control the shake table 4 vibration and control
The fault diagnosis device 5 is run.
In the present embodiment, channel tester 2 described in the step S1 is by generating high-precision μ A, mV grades of small signals
The signal source of acceleration-type watt vibration sensor verifies sensor passage, meets μ A, mV grades of small signal acceleration-types
The demand of watt vibration sensor channel verification.
Specifically, the step S4 further include:
S41, the expert database that watt vibration sensor fault diagnosis is established using failure mode set；
S42, the received detection signal and standard vibration signal, by being compared with the database, based on use
Icon replaces the LABVIEW graphical programming language of line of text creation application program, is passed using data flow programming mode to a watt vibration
The failure of sensor is analyzed.
Accident analysis specifically diagnoses in two ways in step S42 described in the embodiment of the present invention, the first is " basic
Check and judgement " project, main purpose be by it is some it is simple, apparent, obvious check and judgement, quickly really
Determine simple fault, provides conclusion；Second of project for " signal through sensor detection signal analyze result to judge ", including
" analysis of amplitude domain signal ", " time-domain signal analysis ", " frequency domain signal analysis " three kinds of analysis means, to obtain more multiple
Miscellaneous fault diagnosis result, such as some combined faults.
On the basis of " fault set ", use two kinds of diagnosis and inference schemes: the first is " through Basic examination and judgement
Determine failure cause ", i.e., several failures that are basic, being easy to macroscopic examination are shown on interface, user technical staff is directly logical
It crosses the mode chosen and determines failure cause as far as possible；It wants more complex second, referred to as " comes through the analysis of sensor monitoring signals true
Fixed failure " " passes through signal analyzing and diagnosing failure ", and main points are: most of complex fault can not be straight by visual examination
Determination is connect, but these failures can all leave some feature hints, and the faulty figure of institute in amplitude domain, time-domain or frequency domain
Shape can be classified as limited tens kinds of graphic features performance.Amplitude domain figure, time-domain figure are provided on system interface
And spectrogram, and a variety of graphic features are set out, system enumerates 24 kinds of different graphic features in the present embodiment, corresponds to width
Codomain, time-domain and each 8 kinds of frequency domain, user technical staff are chosen corresponding by observing these figures after simply judging
Graphic feature, then, software can according to the fault search of backstage setting with match engine, find and choose the failure to match
Combination, further confirms that failure for technical staff.Pass through the steam turbine watt vibration sensor on-line fault diagnosis and channel verification dress
The application set, to guarantee that steam turbine normal operation provides important evidence.
In conclusion application scheme at least has the prior art following advantageous effects:
It (1), can be with by the application of the steam turbine watt vibration sensor on-line fault diagnosis and channel check system and method
Quickly, vibration signals collecting channel precision checking is accurately completed, interference bring error is reduced.
It (2), can be with by the application of the steam turbine watt vibration sensor on-line fault diagnosis and channel check system and method
The scene of realization verifies a watt vibration sensor.
(3) pass through the application of the steam turbine watt vibration sensor on-line fault diagnosis and channel check system and method, to protect
It demonstrate,proves steam turbine and offer important evidence is provided, improve the in-service service ability of company and open up in-service service business.
As described above, above-mentioned steam turbine watt vibration sensor on-line fault diagnosis and channel check system are for implementing
Above-mentioned steam turbine watt vibration sensor on-line fault diagnosis and channel method of calibration, so, the embodiment of the system and above-mentioned side
One or more embodiments of method are identical, just no longer repeat one by one herein.
Although preferred embodiments of the present invention have been described, it is created once a person skilled in the art knows basic
Property concept, then additional changes and modifications can be made to these embodiments.So it includes excellent that the following claims are intended to be interpreted as
It selects embodiment and falls into all change and modification of the scope of the invention.
Obviously, various changes and modifications can be made to the invention without departing from essence of the invention by those skilled in the art
Mind and range.In this way, if these modifications and changes of the present invention belongs to the range of the claims in the present invention and its equivalent technologies
Within, then the present invention is also intended to include these modifications and variations.
Claims (12)
1. a kind of steam turbine watt vibration sensor fault diagnosis and channel check system characterized by comprising
Junction box (1) has multiple signal paths, connect when watt vibration sensor is operated normally with described watt of vibration sensor, uses
In receiving and transmit the detection signal issued when the operation of watt vibration sensor；
Controller (2) is connect with the junction box (1), and the signal path for controlling the junction box (1) is switched on or switched off；
Channel tester (3) is connect with the controller (2), under the control of the controller (2) with the junction box (1)
Connection, verifies sensor passage for providing multiple checking signals；
Shake table (4) connect with the controller (2) and fixes with a watt vibration sensor, for the control in the controller (2)
It is lower to provide vibration source to watt vibration sensor, it is simultaneously emitted by standard vibration signal；
Fault diagnosis device (5) is connect with the shake table (4), the junction box (1) and the controller (2) respectively, is used for
Watt vibration sensor receives the detection signal and the shake table of watt vibration sensor of the junction box (1) transmission when operating normally
(4) standard vibration signal, watt vibration sensor failure described in inline diagnosis.
2. steam turbine watt vibration sensor fault diagnosis according to claim 1 and channel check system, which is characterized in that institute
Controller (2) are stated for disconnecting between the junction box (1) and the channel tester (3) when watt vibration sensor operates normally
Connection and connect the connection between the junction box (1) and watt vibration sensor；The controller (2) is also used to carrying out channel
The connection between the junction box (1) and watt vibration sensor is disconnected when verification and connects the junction box (1) and the channel school
Test the connection between instrument (3).
3. steam turbine watt vibration sensor fault diagnosis according to claim 2 and channel check system, which is characterized in that institute
It states controller (2) and is also used to control the shake table (4) after the sensor passage verifies qualification and vibrate and control the event
Hinder diagnostor (5) operation.
4. steam turbine watt vibration sensor fault diagnosis according to claim 3 and channel check system, which is characterized in that institute
Stating shake table (4) includes:
It vibrates stage body (41), for providing vibration source and issuing itself standard vibration signal；
Fixing clamp (42) is fixedly connected with the vibration stage body (41) and a watt vibration sensor respectively, for make watt vibration sensor with
The vibration stage body (41) is vibrated together；
Standard probe (43) is connect, for transmitting the mark respectively with the vibration stage body (41) and the fault diagnosis device (5)
Quasi- vibration signal is to the fault diagnosis device (5).
5. steam turbine watt vibration sensor fault diagnosis according to claim 4 and channel check system, which is characterized in that institute
Stating fault diagnosis device (5) includes:
Wiring control module (51) is connect with the standard probe (43) and the junction box (1) respectively, is used for from the wiring
The detection signal of watt vibration sensor of case (1) transmitting and the standard vibration signal of the standard probe (43) transmitting；
Failure analysis module (52) is connect with the wiring control module (51), for the detection signal based on the received with
Standard vibration signal analyzes the failure of watt vibration sensor；
Display module (53) is connect, for showing respectively with the wiring control module (51) and the failure analysis module (52)
Show measurement result, vibrational waveform and analysis result.
6. steam turbine watt vibration sensor fault diagnosis according to claim 5 and channel check system, which is characterized in that institute
Stating wiring control module (51) includes that several control the failure analysis module (52) and the display module (53) operation behaviour
The control key of work, several voltage and current input interfaces and several USB interfaces.
7. steam turbine watt vibration sensor fault diagnosis according to claim 6 and channel check system, which is characterized in that institute
It states controller (2) to connect by the USB interface and the wiring control module (51), the controller (2) is also used to control
The operation of the failure analysis module (52) and the display module (53) operates.
8. steam turbine watt vibration sensor fault diagnosis according to claim 5 and channel check system, which is characterized in that institute
State failure analysis module (52) further include:
Database module (521) establishes a watt expert database for vibration sensor fault diagnosis using failure mode set；
Analysis module (522) is connect with the wiring control module (51) and the database module (521) respectively, is used for root
According to the received detection signal and standard vibration signal, by being compared with the database in the database module (521)
It is right, based on the LABVIEW graphical programming language for replacing line of text creation application program with icon, using data flow programming mode
The failure of watt vibration sensor is analyzed.
9. steam turbine watt vibration sensor fault diagnosis according to claim 1 and channel check system, which is characterized in that institute
Channel tester (3) are stated for generating the signal source of A or mV grades of μ small signal acceleration-type watt vibration sensors to sensor passage
It is verified.
10. a kind of steam turbine watt vibration sensor fault diagnosis and channel method of calibration, which comprises the steps of:
S1, channel tester (3) and junction box (1), the channel tester (3) connected verified, channel verification qualification into
Row step S3, channel verification is unqualified, carries out step S2；
S2, channel failure is analyzed according to the check results of channel tester (3) and is repaired to channel verification qualification
Afterwards, step S3 is carried out；
S3, it is fixedly connected with shake table (4) and watt vibration sensor, the junction box (1) is examined with watt vibration sensor and failure respectively
Disconnected device (5) connection controls the shake table (4) and issues standard vibration signal and transmit the standard vibration signal to fault diagnosis
Device (5), watt vibration sensor transmitting detection signal to the junction box (1)；
The detection signal and the shake table for watt vibration sensor that S4, the fault diagnosis device (5) are transmitted according to junction box (1)
(4) standard vibration signal, watt vibration sensor failure described in inline diagnosis.
11. steam turbine watt vibration sensor fault diagnosis according to claim 10 and channel method of calibration, which is characterized in that
The step S4 further include:
S41, the expert database that watt vibration sensor fault diagnosis is established using failure mode set；
S42, the received detection signal and standard vibration signal, by being compared with the database, based on using icon
Instead of the LABVIEW graphical programming language of line of text creation application program, using data flow programming mode to a watt vibration sensor
Failure analyzed.
12. steam turbine watt vibration sensor fault diagnosis according to claim 10 and channel method of calibration, which is characterized in that
The signal that channel tester (3) described in the step S1 passes through A or mV grades of μ small signal acceleration-type watt vibration sensors of generation
Source verifies sensor passage.
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