CN103644982B - Optical fiber optical grating array sensing temperature measuring equipment and temp measuring method based on labview - Google Patents
Optical fiber optical grating array sensing temperature measuring equipment and temp measuring method based on labview Download PDFInfo
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- CN103644982B CN103644982B CN201310697606.0A CN201310697606A CN103644982B CN 103644982 B CN103644982 B CN 103644982B CN 201310697606 A CN201310697606 A CN 201310697606A CN 103644982 B CN103644982 B CN 103644982B
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Abstract
The present invention relates to a kind of optical fiber optical grating array sensing temperature measuring equipment and its temp measuring method based on labview platforms, it senses temp measuring system by host computer and outside temperature measuring equipment is formed, host computer sensing temp measuring system includes control interface module, function display module, threshold alarm module and the automatic memory module of data；Outside temperature measuring equipment includes light source, optical fiber optical grating array, circulator, body grating demodulation module.The device can realize the collection of temperature and monitoring in real time under the inflammable and explosive extreme conditions such as crude oil storage tank, large-scale power transmission substations inside switch cabinet system and Forest Fire Alarm, temperature warning under different threshold conditions, data output, the data storage of changeable preservation mode, grating parameter is set, the function such as Dynamic Announce of temperature measuring point temperature curve.The device can accurately demodulate the temperature value of grating, and the temperature survey of 0 300 DEG C of temperature-measuring range can be achieved.
Description
Technical field
The present invention relates to a kind of optical fiber temperature-measurement device, more particularly to a kind of optical fiber optical grating array based on labview platforms
Sense temperature measuring equipment and its temp measuring method.
Background technology
Fiber grating sensing system possesses the unexistent advantage of traditional electric transducer, such as high sensitivity, electromagnetism interference, resistance to
Rotten candle, good insulating etc..In production and living, the temperature monitoring of crude oil storage tank, the temperature of large-scale power transmission substations inside switch cabinet
Degree detection and Forest Fire Alarm etc., its working environment require harsh to temperature monitoring system, and monitoring system needs 24 hours
Operation, material insulation and stability height, fiber-optical grating temperature sensor have higher demodulation accuracy, while its small volume, no
The advantages that powered, meets actual demand, is had a wide range of applications in inflammable and explosive adverse circumstances.
At present, common optical sensing thermometric mode has a BOTDR optical fiber sensing monitoring methods, and F-P cavity Sensor monitoring method is red
Outer thermometric monitoring method etc..
BOTDR optical fiber sensing monitoring methods are to be based on Brillouin scattering principle, with reference to the fibre optical sensor of OTDR Detection Techniques.
By detecting Brillouin's rear orientation light, Brillouin shift is analyzed so as to know temperature variation.This is simple in construction, easily forms and divides
Cloth, application field is extensive, but system signal intensity is very faint, and temperature resolution is not high, can not realize to small range temperature
Effective measurement of change.
F-P cavity sensor operating principles are that extraneous physical parameter acts on F-P cavity, show as changing for the long size of F-P cavity chamber
Become so that the optical path difference that two beams receive light changes, so as to demodulate the change of ambient temperature.F-P sensor for temperature
Sensitivity influences far below strain on it, and temperature, stress cross sensitivity problem are its maximum puzzlements, in actual application very
Hardly possible eliminates the influence that stress factors are brought.
IR thermometry often uses infrared temperature-measuring gun or infrared thermography.They belong to contactless device, can carry out remote
Range measurement, in recent years using more and more extensive.But their volumes are big, it is not suitable in inflammable and explosive environment, in addition infrared measurement of temperature
Rifle can only gather a certain moment temperature, can not realize the real-time collection of temperature data.
The content of the invention
Object of the present invention is to provide it is a kind of based on labview platforms optical fiber optical grating array sensing temperature measuring equipment and
Its temp measuring method, it has simple to operate, flexible setting for parameters, and threshold alarm and data preserve the advantages of more accurate succinct.
The present invention is achieved like this, and host computer senses temp measuring system using the upper computer software that Labview is developed as base
Plinth, with reference to outside grating temperature sensor and demodulated equipment, finally realize the temp sensing function of whole device.System interface friend
Good, simple to operate, flexible setting for parameters, threshold alarm and data preservation are more accurate succinct, meet industry in living to temperature
The demand of measurement.
Technical solution of the present invention is as follows：A kind of optical fiber optical grating array sensing temperature measuring equipment based on labview platforms, by upper
Position machine sensing temp measuring system and outside temperature measuring equipment are formed, it is characterised in that：Described host computer senses temp measuring system
Labview programs, including control interface module, function display module, threshold alarm module and the automatic memory module of data.
Control interface module includes the input of grating temperature calibrating parameters, threshold temperature input, processing mode option, photoswitch
Option, beginning/X button；
Function display module include grating-temperature dynamic display figure, sensing spectrum luminous power-wavelength Dynamic Announce figure,
Peak information display window, grating array temperature display window；
Threshold alarm module includes threshold value indicator lamp, buzzing alarm triggered, alarm status on/off buttons；
Automatic memory module includes automatically creating store path, and timing stores and alarm storage both of which selection and mould
Automatically switch between formula；
Outside temperature measurement structure is made up of light source, optical fiber optical grating array, optical circulator, body grating demodulation module；
ASE light sources are connected into optical circulator first port；The grating of optical circulator second port and the different temperature measuring points of placement
Array is connected, and the port of optical circulator the 3rd is connected with the body grating in body grating demodulation module, and body grating demodulation module also includes
Control circuit and DSP, body grating connect DSP by control circuit, and data reach host computer by USB port after DSP collections, lead to
The host computer operating system processing data crossed in host computer.
Grating temperature calibrating method avoids raster center wavelength and influenceed by environmental factor in control interface module, significantly
Improve sensing data demodulation accuracy.The calibrating parameters of grating include demarcation wavelength, demarcation temperature, calibration coefficient, can be according to need
The calibrating parameters for changing each grating are sought, need to only click parameter value input；Threshold temperature input can flexibly be set according to demand
The alarm threshold of diverse location grating temperature, conveniently realize the control to temperature under varying environment requirement.
Grating in function display module-temperature dynamic shows that figure is that dotted line connects, the temperature values of adjacent gratings phase each other
Even, the temperature change of each grating of real-time display, so as to demodulate the transient temperature value of diverse location；Sensing spectrum luminous power-
Wavelength Dynamic Announce figure intuitively shows the intensity signal of optical grating reflection spectrum different wave length, while can be read in peak information display window
Go out corresponding peaks information, the failure that auxiliary investigation grating temperature measuring point is likely to occur.
Threshold alarm module can monitor in real time to multichannel sensing temperature, the warning light real-time display wink of corresponding each temperature value
When working condition, while on/off buttons complete control to alarm status in system terminal, further increase system
Flexibility.
Storage is divided into timing storage and triggering storage both of which, realizing both of which by the judgement alarm status
Automatically switch, avoid data storage redundancy, while make it that alarm data is more directly perceived, it is convenient to consult.Interface operation in
" year-moon " form automatically creates store path, using the date as the daily newly-built storage file of filename, file under this path
Analysis is opened by Excel to check.
Above-mentioned optical fiber optical grating array sensing temperature measuring equipment operation comprises the following steps：
（1）Different gratings are fixed on corresponding temperature measuring point, grating is one another in series, and is connected to optical circulator second port；
（2）Host computer is opened, opens sensing temp measuring system software operation interface；
（3）Click option card, in parameter setting panel arrange parameter：The calibration results of grating are sequentially input into grating temperature
Calibrating parameters, different threshold temperatures is inputted according to being actually needed, selects processing mode, photoswitch option；
Parameter setting finishes, and clicks on start button, and function display module brings into operation, and display interface includes two panels,
Click option card selects：
1st, select temperature information panel, can check grating-temperature dynamic display figure, grating array temperature display window and
Alarm status corresponding to it；
2nd, peak information panel is selected, reflectance spectrum luminous power-wavelength Dynamic Announce figure, peak value display window message can be checked
Breath；
Two panels can switch at any time checks；
（4）Threshold alarm module is controlled by display interface temperature data, under working condition：
1st, all grating measured temperatures are less than corresponding threshold temperature, threshold value indicator lamp display green；
If the 2, a certain grating measured temperature is more than corresponding threshold temperature, corresponding threshold value indicator lamp is changed into red, other
Indicator lamp is constant, while triggers buzzer；Alarm status X button is clicked on, buzzing alarm stops, again tapping on, and alarm is extensive
It is multiple；
（5）Want to check preservation data at the end of thermometric state or thermometric, " the thermometric number under software catalog can be clicked at any time
According to " file, find corresponding document and carry out analysis editor with Excel openings.Data timing memory module memory rate is 1 point
Clock/time, alarm triggered memory module is 5 seconds/time, and the module has very strong autgmentability, can be adjusted according to the actual requirements.
The solution have the advantages that：1st, present apparatus interface is simply friendly, full-featured, and sensitivity is high, has very strong
Practicality is worth with secondary development；2nd, temperature calibration method further increases the temperature measurement accuracy of device, avoid it is extraneous other
Influence of the factor to device；3rd, temperature threshold alarm can all temperature measuring points of Simultaneous Monitoring temperature value, each temperature value corresponding one
Individual threshold value indicator lamp, state of temperature are not interfere with each other so that temperature monitoring is more directly perceived；4th, timing storage is reduced with trigger-type storage
Memory data output, store list automatically update the access property for further increasing temperature data.
Brief description of the drawings
Fig. 1 is experimental provision functional-block diagram of the present invention.
Fig. 2 is apparatus of the present invention rate-determining steps functional-block diagram.
Fig. 3 is host computer operation interface flow chart of the present invention.
Embodiment
As shown in figure 1, the optical fiber optical grating array sensing temperature measuring equipment based on labview platforms, thermometric is sensed by host computer
System and outside temperature measuring equipment are formed, and described host computer sensing temp measuring system is labview programs, including control interface mould
Block, function display module, threshold alarm module and the automatic memory module of data, its outside temperature measuring equipment is by ASE light sources, optical fiber
Grating array, optical circulator and body grating demodulation module are formed.
As shown in figure 1, ASE light sources connect optical circulator first port, output light is via circulator second port and grating
Array is connected, and reflected light enters body grating module via the 3rd port, is acted on by collimation processing and grating dispersion, different ripples
Length will transmit from different directions, convert light signals into electric signal by line array CCD, then adopt through control circuit, DSP
Data are reached PC control interface by collection eventually through USB port.
As shown in Fig. 2（1）Different gratings are fixed on corresponding temperature measuring point, grating is one another in series, and is connected to optical circulator
Two-port netwerk；
（2）Host computer is opened, opens sensing temp measuring system software operation interface；
（3）Click option card, in parameter setting panel arrange parameter：The calibration results of grating are sequentially input into grating temperature
Calibrating parameters, different threshold temperatures is inputted according to being actually needed, selects processing mode, photoswitch option；
Parameter setting finishes, and clicks on start button, and function display module brings into operation, and display interface includes two panels,
Click option card selects：
1st, select temperature information panel, can check grating-temperature dynamic display figure, grating array temperature display window and
Alarm status corresponding to it；
2nd, peak information panel is selected, reflectance spectrum luminous power-wavelength Dynamic Announce figure, peak value display window message can be checked
Breath；
Two panels can switch at any time checks；
（4）Threshold alarm module is controlled by display interface temperature data, under working condition：
1st, all grating measured temperatures are less than corresponding threshold temperature, threshold value indicator lamp display green；
If the 2, a certain grating measured temperature is more than corresponding threshold temperature, corresponding threshold value indicator lamp is changed into red, other
Indicator lamp is constant, while triggers buzzer；Alarm status X button is clicked on, buzzing alarm stops, again tapping on, and alarm is extensive
It is multiple；
（5）Want to check preservation data at the end of thermometric state or thermometric, " the thermometric number under software catalog can be clicked at any time
According to " file, find corresponding document and carry out analysis editor with Excel openings.Data timing memory module memory rate is 1 point
Clock/time, alarm triggered memory module is 5 seconds/time, and the module has very strong autgmentability, can be adjusted according to the actual requirements.
After grating thermometric interface starts, each functional module initialization, temp measuring system software is sensed by USB interface host computer
Establish and communicate with grating demodulation module, the data of reception are analyzed to obtain the information such as corresponding peak value, wavelength, temperature.Will
These information show that at the same time threshold alarm module completes the judgement to temperature data by function display module；Often
The temperature information output of individual collection point, is preserved by automatic storage module, so as to complete the control to temperature in device terminal
System and display function.
Fig. 3 show the flow chart of host computer operation interface：After configuring each input parameter, start grating thermometric interface, respectively
Functional module initialize and attempt with outside foundation communicate, click on START button, program can first determine whether initialize whether into
Work(, if unsuccessful, program can be analyzed mistake, output error code and reason；If success, upper computer software are connect by USB
Mouth receives data and demodulates Bragg reflectance spectrums, obtains peak wavelength and corresponding luminous power and is shown in a manner of dynamic image
Come, reload different temperatures calibration function and further complete wavelength-temperature transition, different grating temperatures can be shown in main interface
Come, while data are automatically performed preservation；If all temperature values are all in safety limit, it indicates that lamp all shows green, data with
Timing mode stores, and otherwise the relevant temperature indicator lamp that transfinites is changed into red simultaneity factor and beeped, while data preserve
Pattern automatically switches to triggering pattern.If now clicking on " stopping alarm " button, buzzer is closed, again tapped on, buzzing weight
Open.Circle collection is handled program in this manner, and until clicking on the Close button, interface is out of service.
Claims (4)
1. a kind of optical fiber optical grating array sensing temperature measuring equipment based on labview, it senses temp measuring system and outside by host computer
Temperature measuring equipment is formed, it is characterised in that：Described host computer sensing temp measuring system is labview programs, including control interface mould
Block, function display module, threshold alarm module and the automatic memory module of data；
The control interface module inputs including grating temperature calibrating parameters, and the calibrating parameters of grating include demarcation wavelength, demarcation
Temperature, calibration coefficient, the calibrating parameters of each grating are changed according to demand, click parameter value input；
The function display module includes grating-temperature dynamic display figure, and grating-temperature dynamic shows that figure is dotted line connection,
The temperature value of adjacent gratings is connected with each other, the temperature change of each grating of real-time display, so as to demodulate the instantaneous of diverse location
Temperature value；
The threshold alarm module includes threshold value indicator lamp, buzzing alarm triggered and alarm status on/off buttons；The threshold
Value alarm module monitors in real time to multichannel sensing temperature, the warning light real-time display momentary operational condition of corresponding each temperature value,
On/off buttons complete the control to alarm status in system terminal simultaneously；
The automatic memory module includes automatically creating store path, and timing stores and alarm storage both of which selection and mould
Automatically switch between formula；Automatically switch realizing both of which by the judgement alarm status；With " year-moon " lattice in the operation of interface
Formula automatically creates store path, and using the date as filename, a newly-built storage file, file pass through Excel daily under this path
Analysis is opened to check；Data timing memory module memory rate is 1 minute/time, and alarm triggered memory module is 5 seconds/time；
The operating process of host computer operation interface is：After configuring each input parameter, start grating thermometric interface, at the beginning of each functional module
Beginningization simultaneously is attempted to communicate with outside foundation, and sense temp measuring system software by USB interface host computer establishes with grating demodulation module
The data of reception are analyzed to obtain corresponding peak value, wavelength, temperature information by communication；These information are shown by function
Module shows that at the same time threshold alarm module completes the judgement to temperature data；The temperature information of each collection point is defeated
Go out, preserved by automatic storage module, so as to complete the control to temperature and display function in device terminal；Click " is opened
Begin " button, whether program can first determine whether to initialize succeeds, if unsuccessful, program can be analyzed mistake, output error code
And reason；If success, upper computer software receives data by USB interface and demodulates Bragg reflectance spectrums, obtains peak wavelength and right
Answer luminous power and shown in a manner of dynamic image, reload different temperatures calibration function and further complete wavelength-temperature
Conversion, different grating temperatures can be shown in main interface, while data are automatically performed preservation；If all temperature values are all in safety
In limit value, it indicates that lamp all shows green, and data are stored with timing mode, and otherwise the relevant temperature indicator lamp that transfinites is changed into red
Simultaneity factor beeps, while data preservation mode automatically switches to triggering pattern；If now click on " stopping alarm " to press
Button, then buzzer closing, is again tapped on, buzzing is restarted；Circle collection is handled program in this manner, is pressed until clicking on " closing "
Button, interface are out of service；
Outside temperature measuring equipment is made up of ASE light sources, optical fiber optical grating array, optical circulator and body grating demodulation module；By ASE light sources
Connect optical circulator first port；Optical circulator second port is connected from the optical fiber optical grating array of the different temperature measuring points of placement, grating
It is one another in series, the port of optical circulator the 3rd is connected with the body grating in body grating demodulation module, and body grating demodulation module also includes
Control circuit and DSP, body grating connect DSP by control circuit, and data reach host computer by USB port after DSP collections, lead to
The host computer operating system processing data crossed in host computer.
A kind of 2. optical fiber optical grating array sensing temperature measuring equipment based on labview as claimed in claim 1, it is characterised in that
The control interface module also includes threshold temperature input, processing mode option, photoswitch option and beginning/X button.
A kind of 3. optical fiber optical grating array sensing temperature measuring equipment based on labview as claimed in claim 1, it is characterised in that
The function display module also includes sensing spectrum luminous power-wavelength Dynamic Announce figure, peak information display window and grating battle array
Row temperature display window.
4. a kind of temp measuring method of optical fiber optical grating array sensing temperature measuring equipment based on labview as claimed in claim 1, its
It is characterised by, the temp measuring method comprises the following steps：
（1）Grating in optical fiber optical grating array is fixed on corresponding temperature measuring point, grating is one another in series, and is connected to optical circulator second
Port；
（2）Host computer is opened, opens the software operation interface of host computer sensing temp measuring system；
（3）Click option card, in parameter setting panel arrange parameter：The calibration results of grating are sequentially input into grating temperature demarcation
Parameter, different threshold temperatures is inputted according to being actually needed, selects processing mode, photoswitch option；Parameter setting finishes, and clicks on
Start button, function display module bring into operation, and display interface includes two panels, the selection of click option card：
Temperature information panel is selected, checks grating-temperature dynamic display figure, grating array temperature display window and its corresponding
Alarm status；
Peak information panel is selected, checks reflectance spectrum luminous power-wavelength Dynamic Announce figure, peak value display window information；Two panels
Switching is checked at any time；
（4）Threshold alarm module is controlled by display interface temperature data, under working condition：
All grating measured temperatures are less than corresponding threshold temperature, threshold value indicator lamp display green；
If a certain grating measured temperature is more than corresponding threshold temperature, corresponding threshold value indicator lamp is changed into red, other indicator lamps
It is constant, while trigger buzzer；Alarm status X button is clicked on, buzzing alarm stops, again tapping on, alarm clearing；
（5）Want to check preservation data at the end of thermometric state or thermometric, can click at any time " temperature measurement data " under software catalog
File, find corresponding document and carry out analysis editor with Excel openings；Data timing memory module memory rate be 1 minute/
Secondary, alarm triggered memory module is 5 seconds/time, and the module has very strong autgmentability, can be adjusted according to the actual requirements.
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| CN106092368A (en) * | 2016-08-23 | 2016-11-09 | 长飞光纤光缆股份有限公司 | Bragg fiber-optical grating temperature sensor, temperature monitoring system and method |
| CN106781193A (en) * | 2017-03-01 | 2017-05-31 | 武汉理工大学 | Parting grating array optical fiber linear temperature-sensing fire detecting system and method during subregion |
| CN109282913A (en) * | 2018-07-26 | 2019-01-29 | 孝感锐创机械科技有限公司 | A kind of non-contact temperature measuring device based on bragg grating |
| CN110763259B (en) * | 2019-11-20 | 2021-10-01 | 南昌航空大学 | Time domain distributed optical fiber sensing method with variable spatial resolution |
| CN111862269A (en) * | 2020-07-27 | 2020-10-30 | 暨南大学 | Method for converting music melody by drawing curve |
| CN116817175B (en) * | 2023-08-31 | 2023-11-14 | 四川雅韵能源开发有限责任公司 | Liquefied natural gas storage tank monitoring and early warning method based on optical fiber sensing |
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| JP3440721B2 (en) * | 1996-11-12 | 2003-08-25 | 日立電線株式会社 | Multi-point strain and temperature sensor |
| CN1865876A (en) * | 2005-11-21 | 2006-11-22 | 天津爱天光电子科技有限公司 | Fiber-optic grating sensor and fiber-optic grating detection device having same |
| CN101118437A (en) * | 2007-09-03 | 2008-02-06 | 石毅 | New style numerically controlled machine remote condition monitoring and failure diagnosis system realizing method |
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