CN109916534A - A kind of temp measuring system and its temp measuring method of distribution type fiber-optic - Google Patents
A kind of temp measuring system and its temp measuring method of distribution type fiber-optic Download PDFInfo
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- CN109916534A CN109916534A CN201910367708.3A CN201910367708A CN109916534A CN 109916534 A CN109916534 A CN 109916534A CN 201910367708 A CN201910367708 A CN 201910367708A CN 109916534 A CN109916534 A CN 109916534A
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Abstract
The invention discloses a kind of temp measuring systems of distribution type fiber-optic, including several fibre optical sensors, detect for the temperature to layout area；Optical signal prosessing module calculates the temperature of layout area for handling the optical signal of fibre optical sensor transmission；Temperature foh module calculates the temperature of non-layout area by the fitting to layout area temperature；Temperature correction module, for being corrected to layout area temperature and non-layout area temperature.The present invention can improve the deficiencies in the prior art, improve the thermometric coverage density of temperature-measuring system of distributed fibers.
Description
Technical field
The present invention relates to distributed optical fiber temperature measurement technical field, the temp measuring system of especially a kind of distribution type fiber-optic and its survey
Warm method.
Background technique
Distributed optical fiber temperature measurement technology is flexible by feat of its arrangement, the spies such as can use under inflammable and explosive environment
Point is widely used in numerous areas such as special equipment, mine tunnels.Although the temperature measuring point quantity of temperature-measuring system of distributed fibers
It is numerous, but in temperature measuring point to outer position, still there are thermometric blind areas, how to improve under the premise of not increasing hardware cost
Thermometric coverage density becomes an important research direction of distributed optical fiber temperature measurement.
Summary of the invention
The technical problem to be solved in the present invention is to provide a kind of temp measuring system of distribution type fiber-optic and its temp measuring methods, can
The deficiencies in the prior art are solved, the thermometric coverage density of temperature-measuring system of distributed fibers is improved.
In order to solve the above technical problems, the technical solution used in the present invention is as follows.
A kind of temp measuring system of distribution type fiber-optic, including,
Several fibre optical sensors are detected for the temperature to layout area；
Optical signal prosessing module calculates the temperature of layout area for handling the optical signal of fibre optical sensor transmission；
Temperature foh module calculates the temperature of non-layout area by the fitting to layout area temperature；
Temperature correction module, for being corrected to layout area temperature and non-layout area temperature.
A kind of temp measuring method of the temp measuring system of above-mentioned distribution type fiber-optic, comprising the following steps:
A, fibre optical sensor detects the temperature of layout area；
B, optical signal prosessing module determines layout area each point according to anti-Stokes light and stokes light light intensity ratio
Temperature value；
C, temperature foh module calculates the temperature of non-layout area by the fitting to layout area temperature；
D, temperature correction module is corrected layout area temperature and non-layout area temperature.
Preferably, calculate non-layout area temperature in step C and include the following steps,
The position of C1, temperature match point；
C2, using temperature foh point as the center of circle, do three concentric circles, respectively the first fitted area, the second fitted area and
At least there are 2 layout area temperature measuring points in first fitted area in third fitted area；Layout area in second fitted area
Temperature measuring point is more than the layout area temperature measuring point in the first fitted area, and layout area temperature measuring point in third fitted area is more than the
Layout area temperature measuring point in two fitted areas；
C3, use the first fitted area, the second fitted area and third fitted area to the temperature of temperature foh point respectively
Trilinear fitting is carried out, the fitting coefficient of each layout area temperature measuring point is directly proportional at a distance from itself and temperature foh point；
C4, repeat the above steps to all temperature foh points C1-C3, and three fittings are established based on cubic fit result
Temperature profile, using the highest fitting temperature profile of the linearity as benchmark distribution map, by other two fitting temperature point
Part in Butut with benchmark distribution map linear correlation is weighted and averaged with benchmark distribution map, obtains final fitting temperature point
In Butut, the weighting coefficient and fitting temperature profile and part of benchmark distribution map linear correlation accounts for entire fitting temperature profile
Ratio it is directly proportional.
Preferably, before being weighted and averaged calculating, being carried out at Wavelet Denoising Method to benchmark distribution map in step C4
Reason.
Preferably, layout area temperature and non-layout area temperature are corrected and are included the following steps in step D,
D1, layout area temperature and non-layout area temperature are combined, obtain regional temperature distribution map, when will be different
The regional temperature distribution map at quarter compares, and marks region and the period of temperature jump variation；
D2, the temperature change of the adjacent area of marked region before marking the period is traversed, if it exists linearly
Relevant temperature jump variation, then be determined as normal, end step D；Otherwise, step D3 is gone to；
D3, the period temperature for using marked region not occur temperature jump variation use marked region as reference value
The temperature changing trend function of adjacent area reference value is corrected, correction of the reference value after correction as marked region
Temperature afterwards.
Brought beneficial effect is by adopting the above technical scheme: mode of the present invention by using multiple fitting, benefit
It is fitted calculating with temperature of the practical temperature measuring point to temperature foh point, fitting precision is high.Then by all temperature spots
Integral correction effectively eliminates caused error amplification in bring error interference and fit procedure during thermometric.The present invention exists
Under the premise of not increasing hardware cost, thermometric coverage density can be greatly improved, more accurate data are provided for temperature detection.
Detailed description of the invention
Fig. 1 is the schematic diagram of a specific embodiment of the invention.
Specific embodiment
Referring to Fig.1, a specific embodiment of the invention includes,
Several fibre optical sensors 1, are detected for the temperature to layout area；
Optical signal prosessing module 2 calculates the temperature of layout area for handling the optical signal of the transmission of fibre optical sensor 1；
Temperature foh module 3 calculates the temperature of non-layout area by the fitting to layout area temperature；
Temperature correction module 4, for being corrected to layout area temperature and non-layout area temperature.
A kind of temp measuring method of the temp measuring system of above-mentioned distribution type fiber-optic, comprising the following steps:
A, fibre optical sensor 1 detects the temperature of layout area；
B, optical signal prosessing module 2 determines layout area each point according to anti-Stokes light and stokes light light intensity ratio
Temperature value；
C, temperature foh module 3 calculates the temperature of non-layout area by the fitting to layout area temperature；
D, temperature correction module 4 is corrected layout area temperature and non-layout area temperature.
In step C, calculates non-layout area temperature and includes the following steps,
The position of C1, temperature match point；
C2, using temperature foh point as the center of circle, do three concentric circles, respectively the first fitted area, the second fitted area and
At least there are 2 layout area temperature measuring points in first fitted area in third fitted area；Layout area in second fitted area
Temperature measuring point is more than the layout area temperature measuring point in the first fitted area, and layout area temperature measuring point in third fitted area is more than the
Layout area temperature measuring point in two fitted areas；
C3, use the first fitted area, the second fitted area and third fitted area to the temperature of temperature foh point respectively
Trilinear fitting is carried out, the fitting coefficient of each layout area temperature measuring point is directly proportional at a distance from itself and temperature foh point；
C4, repeat the above steps to all temperature foh points C1-C3, and three fittings are established based on cubic fit result
Temperature profile, using the highest fitting temperature profile of the linearity as benchmark distribution map, by other two fitting temperature point
Part in Butut with benchmark distribution map linear correlation is weighted and averaged with benchmark distribution map, obtains final fitting temperature point
In Butut, the weighting coefficient and fitting temperature profile and part of benchmark distribution map linear correlation accounts for entire fitting temperature profile
Ratio it is directly proportional.
In step C4, before being weighted and averaged calculating, Wavelet Denoising Method processing is carried out to benchmark distribution map.
In step D, layout area temperature and non-layout area temperature are corrected and are included the following steps,
D1, layout area temperature and non-layout area temperature are combined, obtain regional temperature distribution map, when will be different
The regional temperature distribution map at quarter compares, and marks region and the period of temperature jump variation；
D2, the temperature change of the adjacent area of marked region before marking the period is traversed, if it exists linearly
Relevant temperature jump variation, then be determined as normal, end step D；Otherwise, step D3 is gone to；
D3, the period temperature for using marked region not occur temperature jump variation use marked region as reference value
The temperature changing trend function of adjacent area reference value is corrected, correction of the reference value after correction as marked region
Temperature afterwards.
During being corrected using temperature changing trend function to reference value, there are the changes of the temperature of Spline smoothing for deletion
Change trend function, then residuals temperatures variation tendency function is normalized, uses treated temperature changing trend
Function is corrected reference value.
In the description of the present invention, it is to be understood that, term " longitudinal direction ", " transverse direction ", "upper", "lower", "front", "rear",
The orientation or positional relationship of the instructions such as "left", "right", "vertical", "horizontal", "top", "bottom", "inner", "outside" is based on attached drawing institute
The orientation or positional relationship shown is merely for convenience of the description present invention, rather than the device or element of indication or suggestion meaning must
There must be specific orientation, be constructed and operated in a specific orientation, therefore be not considered as limiting the invention.
The above shows and describes the basic principles and main features of the present invention and the advantages of the present invention.The technology of the industry
Personnel are it should be appreciated that the present invention is not limited to the above embodiments, and the above embodiments and description only describe this
The principle of invention, without departing from the spirit and scope of the present invention, various changes and improvements may be made to the invention, these changes
Change and improvement all fall within the protetion scope of the claimed invention.The claimed scope of the invention by appended claims and its
Equivalent thereof.
Claims (5)
1. a kind of temp measuring system of distribution type fiber-optic, it is characterised in that: including,
Several fibre optical sensors (1), are detected for the temperature to layout area；
Optical signal prosessing module (2) calculates the temperature of layout area for handling the optical signal of fibre optical sensor (1) transmission；
Temperature foh module (3) calculates the temperature of non-layout area by the fitting to layout area temperature；
Temperature correction module (4), for being corrected to layout area temperature and non-layout area temperature.
2. a kind of temp measuring method of the temp measuring system of distribution type fiber-optic described in claim 1, it is characterised in that including following step
It is rapid:
A, fibre optical sensor (1) detects the temperature of layout area；
B, optical signal prosessing module (2) determines layout area each point according to anti-Stokes light and stokes light light intensity ratio
Temperature value；
C, temperature foh module (3) calculate the temperature of non-layout area by the fitting to layout area temperature；
D, temperature correction module (4) are corrected layout area temperature and non-layout area temperature.
3. the temp measuring method of the temp measuring system of distribution type fiber-optic according to claim 2, it is characterised in that: in step C, meter
Non- layout area temperature is calculated to include the following steps,
The position of C1, temperature match point；
C2, using temperature foh point as the center of circle, do three concentric circles, respectively the first fitted area, the second fitted area and third
At least there are 2 layout area temperature measuring points in first fitted area in fitted area；Layout area thermometric in second fitted area
Point is more than the layout area temperature measuring point in the first fitted area, and the layout area temperature measuring point in third fitted area is quasi- more than second
Close the layout area temperature measuring point in region；
C3, respectively the temperature progress using the first fitted area, the second fitted area and third fitted area to temperature foh point
Trilinear fitting, the fitting coefficient of each layout area temperature measuring point are directly proportional at a distance from itself and temperature foh point；
C4, repeat the above steps to all temperature foh points C1-C3, and three fitting temperature are established based on cubic fit result
Distribution map, using the highest fitting temperature profile of the linearity as benchmark distribution map, by other two fittings temperature profile
In be weighted and averaged with the part of benchmark distribution map linear correlation with benchmark distribution map, obtain final fitting Temperature Distribution
In figure, the weighting coefficient and fitting temperature profile and part of benchmark distribution map linear correlation accounts for entire fitting temperature profile
Ratio is directly proportional.
4. the temp measuring method of the temp measuring system of distribution type fiber-optic according to claim 3, it is characterised in that: in step C4,
Before being weighted and averaged calculating, Wavelet Denoising Method processing is carried out to benchmark distribution map.
5. the temp measuring method of the temp measuring system of distribution type fiber-optic according to claim 1, it is characterised in that: right in step D
Layout area temperature and non-layout area temperature are corrected and include the following steps,
D1, layout area temperature and non-layout area temperature are combined, regional temperature distribution map are obtained, by different moments
Regional temperature distribution map compares, and marks region and the period of temperature jump variation；
D2, the temperature change of the adjacent area of marked region before marking the period is traversed, it is linearly related if it exists
Temperature jump variation, then be determined as normal, end step D；Otherwise, step D3 is gone to；
D3, the period temperature for using marked region not occur temperature jump variation use the phase of marked region as reference value
The temperature changing trend function in neighbouring region is corrected reference value, and the reference value after correction is as warm after the correction of marked region
Degree.
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Cited By (1)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN114153249A (en) * | 2022-02-07 | 2022-03-08 | 中国空气动力研究与发展中心低速空气动力研究所 | High-precision optical fiber icing sensor, system and method |
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| US6715915B1 (en) * | 1999-08-13 | 2004-04-06 | Morinaga Milk Industry Co., Ltd. | Fluidity determination method of a packed fluid and device used in the same |
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Effective date of registration: 20190912 Address after: 150000 Heilongjiang city of Harbin province Daoli District Shangzhi Street No. 188 Applicant after: STATE GRID HEILONGJIANG ELECTRIC POWER CO., LTD., HARBIN POWER SUPPLY Co. Applicant after: NORTH CHINA ELECTRIC POWER University (BAODING) Applicant after: STATE GRID CORPORATION OF CHINA Address before: 150000 Heilongjiang city of Harbin province Daoli District Shangzhi Street No. 188 Applicant before: STATE GRID HEILONGJIANG ELECTRIC POWER CO., LTD., HARBIN POWER SUPPLY Co. Applicant before: NORTH CHINA ELECTRIC POWER UNIVERSITY (BAODING) |
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