CN106404066A - Externally pasted fiber grating sensor for diaphragm filter plate, and detection system and method - Google Patents
Externally pasted fiber grating sensor for diaphragm filter plate, and detection system and method Download PDFInfo
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- CN106404066A CN106404066A CN201610884909.7A CN201610884909A CN106404066A CN 106404066 A CN106404066 A CN 106404066A CN 201610884909 A CN201610884909 A CN 201610884909A CN 106404066 A CN106404066 A CN 106404066A
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- G—PHYSICS
- G01—MEASURING; TESTING
- G01D—MEASURING NOT SPECIALLY ADAPTED FOR A SPECIFIC VARIABLE; ARRANGEMENTS FOR MEASURING TWO OR MORE VARIABLES NOT COVERED IN A SINGLE OTHER SUBCLASS; TARIFF METERING APPARATUS; MEASURING OR TESTING NOT OTHERWISE PROVIDED FOR
- G01D21/00—Measuring or testing not otherwise provided for
- G01D21/02—Measuring two or more variables by means not covered by a single other subclass
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Abstract
The invention discloses an externally pasted fiber grating sensor for a diaphragm filter plate, and a detection system and method. The sensor comprises a plurality of fiber grating packaging pasters that are pasted to a diaphragm filter plate of a filter press and are arranged in a matrix mode. The fiber grating packaging pasters having the same structures consist of substrates, fiber gratings arranged on the substrates, and conduction fibers connected with the fiber gratings; the fiber gratings and the substrates are packaged in an integrated mode to detect the diaphragm filter plate strain and/or a temperature change. According to the invention, the fiber grating sensor uses the substrate made of a glass-fiber-reinforced epoxy resin composite material, so that the slight strain at the frame of the diaphragm filter plate can be monitored precisely. Besides, a sensor-based intelligent health monitoring system of the diaphragm filter plate is also provided; and real-time, reliable, and overall health state monitoring based on the slight strain at the side frame of the diaphragm filter plate can be realized.
Description
Technical field
The present invention relates to a kind of external labeling type fiber-optic grating sensor, detecting system and method being applied to membrane filter plate.
Background technology
Diaphragm filter press is to inject high-pressure fluid medium in membrane filter plate, makes whole barrier film heave compressing filter cake, realizes
The filtration machinery of cake dewatering.Diaphragm filter press has squeeze pressure height, good corrosion resistance, easy to maintenance, safe and reliable etc. excellent
Point is metallurgy, papermaking, pharmacy, food, brewage, the first-selection of the industry such as sewage disposal.
The membrane filter plate that diaphragm filter press is adopted is made up of two barrier films and a central layer, and external high pressure fluid medium enters
Entering the within the chamber between central layer and barrier film, making barrier film tympanites thus being compressed to filter chamber, and then preferably separate filtrate and filter
Liquid, improves the solid content of filter cake.
Dynamic component is wanted, the extruding of its own dilation motion repeatedly and external high temperature high pressure filtrate based on its septation
Easily make barrier film that permanent deformation and abrasion and then damage occur with washing away.If the membrane filter plate damaging is changed not in time, may
Further even more serious damage is caused to whole pressure filter.But in producing, generally cannot grasp the health of membrane filter plate in real time
State, can only rely on the membrane filter plate that experience investigation is damaged after there is irremediable loss.
As can be seen here, the real time health monitoring of membrane filter plate is particularly significant.Health monitoring is carried out with true to its usage state
Protect production safety, early warning is carried out to filter plate of problems, loss that filter plate destruction cause can be greatly reduced.Meanwhile, pass through
From collection in worksite, record, the membrane filter plate usage process data preserving, analysis also can determine that equipment user is in use
No have unlawful practice, is effectively prevented from the product quality dispute between pressure filter manufacturer and user.
Common health monitor method is mainly ray, ultrasonic, infrared, vortex, microwave, laser hologram photography technology, mesh
Some nondestructive means such as inspection survey.The feature of these conventional lossless detection methods is typically offline, static, passive.Arrive
So far, restricted by multi-party surface technology, China not yet reliably realizes the real time health monitoring to membrane filter plate and remaining longevity
Life assessment.
The interior monitoring technology burying fiber-optic grating sensor in membrane filter plate, can be with the work shape of on-line monitoring membrane filter plate
State, in time, comprehensively finds the damage that membrane filter plate occurs.But, there is problems with its application：
(1) in the central layer and barrier film of membrane filter plate interior bury fiber-optic grating sensor need to remake both mould,
Adjustment moulding process, makes with high costs, the increased risk of technology upgrading；
(2) because the deflection of barrier film is larger, the fiber grating effective deformation amount being inside embedded in barrier film requires more than 10%,
Need to customize special optical fiber, upgrade cost increases further.
(3) in the central layer of membrane filter plate and the forming process of barrier film complexity, the fiber-optic grating sensor of embedment easily misplaces,
Produce shape distortion, stress concentration is even damaged, poor controllability, percent defective increases, and technical risk is big；
(4) the grid region quantity of the array optical fiber grating sensor burying in is big, significantly increases the crucial device of technology upgrading
Part cost；
(5) barrier film after molding and central layer are assembled into complete membrane filter plate, the frame needs of the membrane filter plate assembling
The machining such as carry out planing, hole, and the fiber-optic grating sensor joint of built-in type brings inconvenience to these processing, makes
Complex procedures, increase filter plate manufacturing cost；
(6) once the interior fiber-optic grating sensor inactivation burying, then do not repair, change the possibility of these inactive sensor
Property.
The health monitoring technique of external application fiber-optic grating sensor on membrane filter plate, not only can on-line monitoring membrane filter plate
Working condition, in time, comprehensively find the damage that membrane filter plate occurs, and above-mentioned built-in type fiber grating can be avoided
The technological deficiency of sensor.As can be seen here, the fiber-optic grating sensor of external labeling type is in the Non-Destructive Testing of membrane filter plate health status
The middle fiber-optic grating sensor than built-in type has superiority.But, existing surface mount formula fiber-optic grating sensor be by
Fiber grating is pasted onto on gum base substrate or notched metal basal board first, makes sensor and makes after protecting joint
With.And the sensor of gum base substrate package due to the strength and stiffness of gum base relatively low, easy there is lax or creep, non-refractory,
So long term high temperature environment and the bad working environments of pressure filter cannot be met.Metal basal board encapsulate paster complicated process of preparation, from
The mass density of body is high, and the short glass fiber reinforced polypropylene base that metal basal board itself modulus is much larger than used by membrane filter plate is multiple
The modulus of condensation material, leads to the accuracy of its transmission strain to be greatly lowered, and then causes the measuring accuracy of fiber grating cannot
Meet and require.
Additionally, membrane filter plate is in the course of the work, its rough working surface is constantly subject to high pressure-temperature current etc.
Wash away with extruding it is impossible to arrange sensor, therefore the sensor patch of external labeling type can only be pasted on the outer of membrane filter plate frame
Surface, this puts forward higher requirement to the accuracy of detection of sensor and sensitivity.Due to being pasted on membrane filter plate frame appearance
The sensor in face can only directly monitor the strain of frame portion with temperature conditionss it is impossible to the overall strain of direct access membrane filter plate
Field and temperature field, more cannot directly know the degree of impairment of membrane filter plate, therefore existing detecting and analysing system still can not be based on
The strain of filter plate frame, temperature conditionss carry out real-time monitoring to the holistic health state of membrane filter plate.
Content of the invention
The present invention is in order to solve the above problems it is proposed that a kind of external labeling type optical fiber grating sensing being applied to membrane filter plate
Device, detecting system and method, the optical fiber of the external labeling type with glass fiber reinforced epoxy resin composite as substrate being provided
Grating sensor, can accurately monitor the small strain at membrane filter plate frame, provided based on the sensor
Membrane filter plate intelligent health monitoring system, can be carried out real-time, reliable, whole based on the small strain at membrane filter plate frame
The health status monitoring of body.
To achieve these goals, the present invention adopts the following technical scheme that：
A kind of external labeling type fiber-optic grating sensor being applied to membrane filter plate, including on the membrane filter plate being pasted on pressure filter
In matrix form arrangement several optical fiber Bragg grating encapsulation pasters, each optical fiber Bragg grating encapsulation paster structure is identical, all includes base
Plate and the fiber grating laid on substrate and the conduction optical fiber being connected with described fiber grating, described fiber grating and base
Plate overall package, the strain of detection membrane filter plate or/and temperature change.
Described substrate is glass fiber reinforced epoxy resin composite, with vacuum auxiliary pouring liquid-state epoxy resin and soak
Stain glass fabric and the technique packaged fiber grating of solidify afterwards and substrate, form optical fiber Bragg grating encapsulation paster.
The fiber grating of described encapsulation can be single strain monitoring grating, may also comprise temperature monitoring grating, warm when including
During degree monitoring grating, described temperature monitoring grating can be used for temperature monitoring and can also be used for temperature-compensating during strain monitoring.
Described fiber grating paster is pasted with the thermosetting resins such as epoxy resin, unsaturated polyester (UP) and membrane filter plate.
Described fiber grating paster is respectively adhered on the position of the corresponding barrier film of frame outer surface and central layer, monitors two panels respectively
Barrier film and the strain regime of middle central layer.
A kind of external labeling type fiber bragg grating sensing device being applied to membrane filter plate, including light source, above-mentioned external labeling type optical fiber light
Gate sensor, fiber coupler and fiber Bragg grating (FBG) demodulator, described light source produces continuous frequency modulation laser, and laser signal passes through lead
Enter the fiber grating of external labeling type fiber-optic grating sensor, form stable reflected signal, external labeling type fiber-optic grating sensor leads to
Cross optical fiber and be sequentially connected fiber coupler and fiber Bragg grating (FBG) demodulator.
Described fiber coupler has two, and laser signal is divided into two-way, is transferred to light by a fiber coupler respectively
The two ends of fine grating demodulation instrument, form two ports.
Described light source is the built-in light source of independent light source or fiber Bragg grating (FBG) demodulator, produces continuous frequency modulation laser, and laser is believed
Number fiber-optic grating sensor is entered by optical fiber, form stable reflected signal.
A kind of membrane filter plate intelligent health monitoring system, fills including the external labeling type optical fiber grating sensing being applied to membrane filter plate
Put, intelligent analysis module, warning module, display module and membrane filter plate damage data storehouse, wherein, external labeling type optical fiber grating sensing
The fiber-optic grating sensor of device is paved in the outside of membrane filter plate frame, and the strain to membrane filter plate and/or temperature carry out reality
When monitoring and signal demodulation, intelligent analysis module according to collection parameter information analyze membrane filter plate degree of injury, early warning mould
Block reads the degree of injury of membrane filter plate, exceedes and is reported to the police during alarm threshold, the degree of impairment to membrane filter plate for the display module
Carry out Real time dynamic display.
Described intelligent analysis module, including strain field and temperature field analysis device, fatigue accumulation arithmetical unit, filter plate non-destructive tests
Arithmetical unit and residual intensity arithmetical unit, wherein：
Described strain field and temperature field analysis device, are configured to the real time temperature according to sensing device input and/or strain
Data enters real-time temperature field and/or the strain field that row operation draws membrane filter plate, and result is exported to display module, and preserve to
Data base, forms membrane filter plate history floor data；
Described fatigue accumulation arithmetical unit, it is configured to, with reference to membrane filter plate material creep and the particular attribute such as lax, be based on
Rain flow method carries out fatigue mechanisms, the history floor data of its reading database septation filter plate, calculates the fatigue damage of filter plate
Wound；
Described membrane filter plate non-destructive tests arithmetical unit, it is configured to the Monitoring Data according to membrane filter plate, by artificial god
Pattern recognition function through network is mated with membrane filter plate damage data storehouse to the stress-strain state of filter plate, realizes damaging
Identification；
Described residual intensity arithmetical unit, it is configured to carry out residual intensity according to membrane filter plate degree of injury calculate and predict
The residual life of membrane filter plate, result is exported to display module and warning module.
Described membrane filter plate damage data storehouse, is configured to Binding experiment data, is being occurred using finite element software simulation
Filter plate strain everywhere during dissimilar, different parts damage and the damage fingerprint storehouse set up, and the material of membrane filter plate
Learn data and history floor data.
Described display module, including：
Model load-on module, is configured to read threedimensional model formatted file, extracts the FEM (finite element) model of membrane filter plate, with
When model can be rotated, scaled or be moved, from multiple directions observing and nursing；
Data load-on module, is configured to communicate with intelligent analysis module, reads the real-time field of intelligent analysis module output
Distributed data and residual life data；
Coupling display module, is configured to real-time field distribution data, residual life data on the threedimensional model of filter plate
Corresponding display.
Described warning module, sets interface and emergency alarm bell including healthy threshold value.User can set healthy threshold value as needed,
When being less than healthy threshold value from intelligent analysis module to the residual life that healthy early warning module exports, emergency alarm bell sends alarm.
A kind of analysis and early warning method of membrane filter plate, comprises the following steps：
(1) set up the FEM (finite element) model of membrane filter plate, analysis membrane filter plate in working order under stress, look for respectively
Go out positioned at barrier film and central layer corresponding strain field sensitive point, so that it is determined that the installation position of fiber-optic grating sensor and side
To；
(2) connecting detection system, the temperature of collection membrane filter plate and/or strain parameter；
(3) real-time temperature field and the strain field of membrane filter plate are determined according to the data of collection, in conjunction with its history floor data
Calculate, judge its degree of injury and residual intensity, the residual life of prediction membrane filter plate；
(4), when residual life is less than healthy threshold value, reported to the police.
Beneficial effects of the present invention are：
(1) directly can paste on existing membrane filter plate finished product arranges it is not necessary to redesign mould and its moulding process,
The external application of sensor and wiring be all membrane filter plate assembling complete and machining after, application is easy, workable, becomes
This is low, applied widely, can be quickly applied to different model specification, the membrane filter plate of different purposes；
(2) external application technology is simple, ripe, and controllability is strong；Number of sensors is few, the Primary Component cost needed for technology upgrading
Low；
(3) fiber-optic grating sensor with glass fiber reinforced epoxy resin composite as substrate package has weight
Gently, the features such as strength and stiffness height, endurance, transparency height, anti-electromagnetic interference capability are strong；
(4) glass fiber reinforced epoxy resin composite has the modulus close with membrane filter plate own material, can
The more accurately and reliably strain of real-time monitoring membrane filter plate and state of temperature；
(5) draw the overall strain temperature of membrane filter plate by monitoring the strain of membrane filter plate frame with temperature conditionss computing
, and with threedimensional model Dynamic Announce, intellectual analysis are carried out according to Monitoring Data, draw the health status of filter plate and remaining longevity
Life, sends early warning in time, provides reliable decision-making foundation to equipment supplier and user, thus be prevented effectively from membrane filter plate damaging
The property loss brought, improves equipment application efficiency, has very high economic benefit.
Brief description
Fig. 1 is the structural representation of optical fiber Bragg grating encapsulation paster.
Fig. 2 is the three-dimensional axonometric drawing of optical fiber Bragg grating encapsulation paster.
Fig. 3 is the outer fiber-optic grating sensor monitoring system schematic diagram being affixed on diaphragm filter board of filter press.
Fig. 4 is the application process schematic diagram of the outer fiber-optic grating sensor monitoring system being affixed on diaphragm filter board of filter press.
Fig. 5 is the raster center wavelength-pressure loading detection of the outer fiber-optic grating sensor being affixed on diaphragm filter board of filter press
Result.
Wherein, 1, galss fiber reinforced resin protecting film, 2, conduction optical fiber, 3, galss fiber reinforced resin substrate, 4, light
Grid region.
Specific embodiment：
The invention will be further described with embodiment below in conjunction with the accompanying drawings.
As depicted in figs. 1 and 2, the present invention provides a kind of galss fiber reinforced resin substrate formula optical fiber Bragg grating encapsulation paster,
Including conductive glass fiber-reinforced resin protecting film 1, conduction optical fiber 2, galss fiber reinforced resin substrate 3, grating region 4.
Galss fiber reinforced resin protecting film 1 passes through above conduction optical fiber 2 and galss fiber reinforced resin substrate
Layer of glass reinforced resin thin film obtained by vacuum auxiliary pouring technique, the liquid resin infusion glass fibre being poured
Cloth, then passes through co-curing behavior and is shaped to an entirety with galss fiber reinforced resin substrate 3.The fiber grating thus prepared
Encapsulation paster bottom surface is smooth and upper surface, with fiber grating arrangement nature molding, is easy to glass fabric and is preferably protected optical fiber light
Grid and exactly transmission strain.
External labeling type fiber-optic grating sensor is in series by m encapsulation paster being packaged with n fiber grating arranged side by side, and 1
≤ n≤10,1≤m≤60.Described encapsulation paster, with glass fiber reinforced epoxy resin composite as substrate, is packaged with n root light
Fine grating, can simultaneously the parameter to be measured such as detection temperature and strain it is also possible to independent detection temperature or strain.
Because the central layer of membrane filter plate and the barrier film of both sides have diverse strain field, so fiber-optic grating sensor
The region of corresponding barrier film and filter plate on membrane filter plate frame must be respectively adhered on, to monitor the strain field of central layer and barrier film respectively.
As shown in figure 3, the outer fiber-optic grating sensor application system being affixed on membrane filter plate include optical fiber grating sensing module,
Intelligent analysis module, real-time visual module and healthy early warning module.
Optical fiber grating sensing module includes light source, fiber-optic grating sensor, fiber coupler, fiber Bragg grating (FBG) demodulator.Its
In, light source can also be able to be built in fiber Bragg grating (FBG) demodulator for arbitrary source, preferably molded-in in fiber Bragg grating (FBG) demodulator
Light source, produce continuous frequency modulation laser, laser signal enters fiber grating, the stable reflected signal of formation by lead.Optical fiber
Grating sensor is in series by some optical fiber Bragg grating encapsulation pasters.Fiber coupler is fiber grating signal coupler, has
The fiber coupler that excellent wavelength selective power and the characteristic of multiport are compact conformations, loss is little, polarization is unrelated.Optical fiber
Grating demodulation instrument is middling speed or high speed optic fiber grating wavelength (FBG) demodulator, has the demodulation scheme of multi-channel parallel, realizes signal fast
Speed demodulation, meets health monitoring needs, grating signal that can be with fast demodulation filter plate under working environment.Light source, fiber grating
All connected by optical fiber between sensor, fiber coupler, fiber Bragg grating (FBG) demodulator, transmission signal is optical signal.
Fiber-optic grating sensor is paved in the outside of membrane filter plate frame.
Fiber coupler has two, and optical signal is divided into two-way, is transferred to fiber grating by a fiber coupler respectively
The two ends of sensor cluster, form two ports.
Optical signal is transferred to one end of fiber-optic grating sensor assembly by a fiber coupler, forms one and has light concurrently
The port that incident and light reflects.
Light source is the built-in light source of fiber Bragg grating (FBG) demodulator, produces continuous frequency modulation laser, and laser signal is entered by optical fiber
Fiber-optic grating sensor, forms stable reflected signal.
Optical fiber Bragg grating encapsulation paster is glued using the thermosetting resins such as epoxy resin, unsaturated polyester (UP) and membrane filter plate
Patch, is coated with the thermosetting resins such as a layer of epoxy resin, unsaturated polyester (UP) and is being disliked with guaranteeing fiber grating probe unit after stickup
Survival rate under bad operating mode simultaneously ensures itself and the accuracy of filter plate strain transfer and the concordance of temperature.
Intelligent analysis module, including membrane filter plate damage data storehouse and breakdown diagnosises software.
Filter plate damage data storehouse comprises materialogy data and its history floor data of membrane filter plate, and Binding experiment number
According to, when simulating dissimilar, different parts the damage of generation using finite element software, the damage that filter plate strain data everywhere is set up
Hinder fingerprint base.
Breakdown diagnosises software is to be damaged based on the membrane filter plate that is applied to of Finite Element Simulation Software, analysis of fatigue software development
The special-purpose software of analysis, including strain field, temperature field analysis device, fatigue accumulation arithmetical unit, membrane filter plate non-destructive tests arithmetical unit
With residual intensity arithmetical unit.Strain field, temperature field analysis device are by real time temperature that optical fiber grating sensing module is drawn and should
Become data and carry out real-time temperature field and the strain field that computing draws membrane filter plate, result is exported to real-time visual module, and
Preserve to data base, form filter plate history floor data.Fatigue accumulation passes through the history floor data meter of membrane filter plate arithmetical unit
Calculate, judge the fatigue damage of membrane filter plate.Membrane filter plate non-destructive tests arithmetical unit, according to membrane filter plate Monitoring Data, by people
The pattern recognition function of artificial neural networks is mated with damage fingerprint storehouse to the stress-strain state of filter plate, realizes damaging and knows
Not.Residual intensity carries out, according to membrane filter plate degree of injury, the remaining longevity that residual intensity calculates and predicts membrane filter plate arithmetical unit
Life, result is exported to real-time visual module and warning module.
Healthy early warning module, sets interface and emergency alarm bell including healthy threshold value.User can set healthy threshold value as needed,
When being less than healthy threshold value from intelligent analysis module to the residual life that healthy early warning module exports, emergency alarm bell sends alarm.
Real-time visual module, loads including 3-D geometric model, data loads and coupling three submodules of display.Pass through
3-D geometric model loads submodule and reads the threedimensional model formatted file such as igs, dwg, extracts the FEM (finite element) model of membrane filter plate,
Can model be carried out rotating simultaneously, the basic operation such as scale, move, to observe from multiple directions.Data loads submodule and connects
Receive real-time field distribution data and the residual life data of intelligent analysis module output.Coupling display sub-module closes according to space geometry
Unit in membrane filter plate FEM (finite element) model is shown over the display by system with the mapping of corresponding data cell.
Fig. 4 show the application process of the outer fiber-optic grating sensor application system being affixed on membrane filter plate, using above-mentioned biography
Sensor and application system, specifically include following steps：
(1) determine the monitoring position of membrane filter plate, lay sensor.
Set up the FEM (finite element) model of diaphragm filter board of filter press, using the Finite Element Simulation Software such as Abaqus, Ansys analysis every
Membrane filtration plate in working order under stress, and carry out analysis of fatigue using the analysis of fatigue software such as FE-SAFE, analysis is located at
Change of stress field sensitive spot outside filter plate, determines installation position and the direction of fiber-optic grating sensor.Further combined with experiment
The damage fingerprint storehouse of this model membrane filter plate is set up in the simulation that data carries out various degree of impairments.
(2) adopt the thermosetting resin such as epoxy resin, unsaturated polyester (UP) that fiber-optic grating sensor is pressed the position determining in (1)
Put and direction is pasted on membrane filter plate frame, connect fiber-optic grating sensor and light source, fiber grating solution from suitable optical fiber
Adjust instrument, fiber coupler.
(3) in monitoring server computer, filter plate breakdown diagnosises software, filter plate damage data storehouse are installed.Debugging breakdown diagnosises
In software, the communications and data between each arithmetical unit and data base exchanges, with data wire Connection Service end computer and fiber grating solution
Adjust instrument, realize efficient communication.
(4) real-time visual module is installed.Its threedimensional model is loaded according to actual membrane filter plate model, extracts finite element mould
Type, and complete the mapping relations of FEM (finite element) model unit and data cell.
(5) warning module is installed, user sets filter plate residual life threshold value according to required Health Category, installs to connect and report to the police
Bell.
Using the above-mentioned outer fiber-optic grating sensor being affixed on membrane filter plate, obtain the raster center ripple of membrane filter plate
Length-pressure loading testing result, as shown in Figure 5 it is seen that, the registration of 5 loading-unloading cyclic curves of actual measurement is very high, shows
Good detection stability and reliability are shown.
Although the above-mentioned accompanying drawing that combines is described to the specific embodiment of the present invention, not model is protected to the present invention
The restriction enclosed, one of ordinary skill in the art should be understood that on the basis of technical scheme, and those skilled in the art are not
Need to pay the various modifications that creative work can make or deformation still within protection scope of the present invention.
Claims (10)
1. a kind of external labeling type fiber-optic grating sensor being applied to membrane filter plate, is characterized in that：Including be pasted on pressure filter every
Several optical fiber Bragg grating encapsulation pasters arranged in matrix form on membrane filtration plate, each optical fiber Bragg grating encapsulation paster structure is identical,
Substrate and the fiber grating laid and the conduction optical fiber being connected with described fiber grating, described optical fiber are all included on substrate
Grating and substrate overall package, the strain of detection membrane filter plate or/and temperature change.
2. a kind of external labeling type fiber-optic grating sensor being applied to membrane filter plate as claimed in claim 1, is characterized in that：Described
Substrate is glass fiber reinforced epoxy resin composite, with vacuum auxiliary pouring liquid resin process packaged fiber grating and base
Plate shape forming fibre-optic grating encapsulates paster.
3. a kind of external labeling type fiber-optic grating sensor being applied to membrane filter plate as claimed in claim 1, is characterized in that：Described
The fiber grating of encapsulation is single strain monitoring grating, or also includes temperature monitoring grating, when including temperature monitoring grating, described
Temperature monitoring grating is used for temperature-compensating when temperature monitoring or strain monitoring.
4. a kind of external labeling type fiber-optic grating sensor being applied to membrane filter plate as claimed in claim 1, is characterized in that：Described
Fiber grating paster is respectively adhered on the position of the corresponding barrier film of frame outer surface and central layer, monitoring two panels barrier film and intermediate core respectively
The strain regime of plate.
5. a kind of external labeling type fiber bragg grating sensing device being applied to membrane filter plate, including light source, such as in claim 1-4 arbitrary
External labeling type fiber-optic grating sensor described in, fiber coupler and fiber Bragg grating (FBG) demodulator, described light source produces continuous frequency modulation
Laser, laser signal enters the fiber grating of external labeling type fiber-optic grating sensor by lead, forms stable reflected signal, outward
Mounted fiber-optic grating sensor is sequentially connected fiber coupler and fiber Bragg grating (FBG) demodulator by optical fiber.
6. a kind of membrane filter plate intelligent health monitoring system, is characterized in that：Filter including being applied to barrier film as claimed in claim 5
The external labeling type fiber bragg grating sensing device of plate, intelligent analysis module, warning module, display module and membrane filter plate damage data
Storehouse, wherein, the fiber-optic grating sensor of external labeling type fiber bragg grating sensing device is paved in the outside of membrane filter plate frame, to barrier film
The strain of filter plate and/or temperature carry out real-time monitoring and signal demodulation, and intelligent analysis module is according to the parameter information analysis of collection
The degree of injury of membrane filter plate, warning module reads the degree of injury of membrane filter plate, exceedes and is reported to the police during alarm threshold, display
Module carries out Real time dynamic display to the degree of impairment of membrane filter plate.
7. a kind of membrane filter plate intelligent health monitoring system as claimed in claim 6, is characterized in that：Described intellectual analysis mould
Block, including strain field and temperature field analysis device, fatigue accumulation arithmetical unit, filter plate non-destructive tests arithmetical unit and residual intensity computing
Device, wherein：
Described strain field and temperature field analysis device, are configured to the real time temperature according to sensing device input and/or strain data
Enter real-time temperature field and/or the strain field that row operation draws membrane filter plate, result is exported to display module, and preserves to data
Storehouse, forms membrane filter plate history floor data；
Described fatigue accumulation arithmetical unit, it is configured to reference to membrane filter plate material creep and lax attribute, based on rain flow method
Carry out fatigue mechanisms, the history floor data of its reading database septation filter plate, calculate the fatigue damage of filter plate；
Described membrane filter plate non-destructive tests arithmetical unit, it is configured to the Monitoring Data according to membrane filter plate, by ANN
The pattern recognition function of network is mated with membrane filter plate damage data storehouse to the stress-strain state of filter plate, realizes damaging and knows
Not；
Described residual intensity arithmetical unit, it is configured to carry out residual intensity according to membrane filter plate degree of injury calculate and predict barrier film
The residual life of filter plate, result is exported to display module and warning module.
8. a kind of membrane filter plate intelligent health monitoring system as claimed in claim 6, is characterized in that：Described membrane filter plate damages
Data base, is configured to Binding experiment data, using finite element software simulation when there is dissimilar, different parts damage
Filter plate strain everywhere and the damage fingerprint storehouse set up, and the materialogy data of membrane filter plate and history floor data.
9. a kind of membrane filter plate intelligent health monitoring system as claimed in claim 6, is characterized in that：Described display module, bag
Include：
Model load-on module, is configured to read threedimensional model formatted file, extracts the FEM (finite element) model of membrane filter plate, may be used simultaneously
Model is rotated, scaled or is moved, from multiple directions observing and nursing；
Data load-on module, is configured to communicate with intelligent analysis module, reads the real-time field distribution of intelligent analysis module output
Data and residual life data；
Coupling display module, is configured to real-time field distribution data, residual life data is corresponding on the threedimensional model of filter plate
Display.
10. a kind of analysis and early warning method of membrane filter plate, is characterized in that：Comprise the following steps：
(1) set up the FEM (finite element) model of membrane filter plate, analysis membrane filter plate in working order under stress, find out position respectively
In barrier film and central layer corresponding strain field sensitive point, so that it is determined that the installation position of fiber-optic grating sensor and direction；
(2) connecting detection system, the temperature of collection membrane filter plate and/or strain parameter；
(3) real-time temperature field and the strain field of membrane filter plate is determined according to the data of collection, calculate in conjunction with its history floor data,
Judge its degree of injury and residual intensity, the residual life of prediction membrane filter plate；
(4), when residual life is less than healthy threshold value, reported to the police.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201610884909.7A CN106404066B (en) | 2016-10-10 | 2016-10-10 | External labeling type fiber-optic grating sensor, detection system and method applied to membrane filter plate |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201610884909.7A CN106404066B (en) | 2016-10-10 | 2016-10-10 | External labeling type fiber-optic grating sensor, detection system and method applied to membrane filter plate |
Publications (2)
| Publication Number | Publication Date |
|---|---|
| CN106404066A true CN106404066A (en) | 2017-02-15 |
| CN106404066B CN106404066B (en) | 2019-09-03 |
Family
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| CN201610884909.7A Active CN106404066B (en) | 2016-10-10 | 2016-10-10 | External labeling type fiber-optic grating sensor, detection system and method applied to membrane filter plate |
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| Country | Link |
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| CN110823120A (en) * | 2019-12-13 | 2020-02-21 | 大连理工大学 | Compensation method for measurement error of surface-mounted fiber grating strain sensor |
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| Publication number | Priority date | Publication date | Assignee | Title |
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| CN107765163A (en) * | 2017-09-07 | 2018-03-06 | 国营芜湖机械厂 | A kind of Fault Diagnosis of Circuit Board method based on fiber-optical grating temperature sensor array |
| CN107941283A (en) * | 2017-12-22 | 2018-04-20 | 中南大学 | The multi-parameter on-line monitoring system and method for composite material hot-press solidifying process |
| CN107941283B (en) * | 2017-12-22 | 2024-03-12 | 中南大学 | Multi-parameter on-line monitoring system and method for hot-press curing process of composite material |
| CN110823120A (en) * | 2019-12-13 | 2020-02-21 | 大连理工大学 | Compensation method for measurement error of surface-mounted fiber grating strain sensor |
| CN110823120B (en) * | 2019-12-13 | 2020-08-14 | 大连理工大学 | Compensation method for measurement error of surface-mounted fiber grating strain sensor |
| CN115219060A (en) * | 2022-03-24 | 2022-10-21 | 燕山大学 | Intelligent optical fiber buoyancy material |
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