CN116358732A - Array type optical fiber temperature detection assembly and detection method - Google Patents
Array type optical fiber temperature detection assembly and detection method Download PDFInfo
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- G01K11/00—Measuring temperature based upon physical or chemical changes not covered by groups G01K3/00, G01K5/00, G01K7/00 or G01K9/00
- G01K11/32—Measuring temperature based upon physical or chemical changes not covered by groups G01K3/00, G01K5/00, G01K7/00 or G01K9/00 using changes in transmittance, scattering or luminescence in optical fibres
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- G01L—MEASURING FORCE, STRESS, TORQUE, WORK, MECHANICAL POWER, MECHANICAL EFFICIENCY, OR FLUID PRESSURE
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Abstract
The array type optical fiber temperature detection assembly comprises an optical fiber array which is fixed on the surface of a detected object and is formed by reciprocally arranging optical fibers into an array, wherein the array is a plurality of reciprocally parallel line planes or mutually interweaved grid planes which are evenly spaced, and adjacent parallel lines are connected end to form a closed loop; one end of the optical fiber is sequentially connected with the data acquisition module, the data storage module and the data processing module, and data acquired by the data acquisition module are stored in the data storage module and are analyzed and calculated through the data processing module to obtain a temperature detection result. And obtaining temperature detection matrixes at different moments, converting to obtain a temperature change rate matrix, and finding out a column vector corresponding to the maximum norm in the temperature change rate matrix, namely a position with the maximum temperature change trend, so as to extract a target position. The invention can reflect the state changes of temperature or stress and the like caused by the flow direction of the internal medium of the pipeline, and realize the analysis or prediction of the abnormal state of the pipeline.
Description
Technical Field
The invention belongs to the field of temperature field detection, and particularly relates to an array type optical fiber temperature detection assembly and a detection method.
Background
The industrial pipeline can generate thermal expansion and cold contraction phenomena along with the temperature change of the internal medium in operation, and the pipeline generates stress. The use over the years inevitably causes corrosion or scaling of the pipes, which results in a change of the heat transfer state of the surfaces thereof and possibly causes leakage. The conventional measuring method for detecting the state of the industrial pipeline by using the conventional point type or line type only reflects the state of the temperature or stress of the wall surface of the pipeline, and has the defects that the state changes of the pipeline, such as the temperature or the stress, and the like caused by the flowing direction of the medium in the pipeline cannot be reflected, and the analysis or the prediction of the abnormal state of the pipeline cannot be easily realized. The conventional optical fiber temperature measurement adopts a linear measurement mode, and has similar problems. Therefore, it is a long-felt but as yet unsolved problem of the person skilled in the art to provide a temperature detection device and method for an industrial pipeline which is simple in structure, convenient to use, capable of automatic continuous measurement and high in accuracy.
Disclosure of Invention
The invention aims to solve the problems in the prior art, and provides an array type optical fiber temperature detection assembly and a detection method, which are simple in product structure, convenient to use, capable of realizing automatic continuous measurement and high in detection precision.
In order to achieve the above purpose, the present invention has the following technical scheme:
an array type optical fiber temperature detection assembly comprises an optical fiber array which is fixed on the surface of a detected object and is formed by arranging optical fibers in a reciprocating manner, wherein the array is a plurality of reciprocating parallel line planes which are uniformly spaced or grid planes which are mutually interweaved, and adjacent parallel lines are connected end to form a closed loop; one end of the optical fiber is sequentially connected with the data acquisition module, the data storage module and the data processing module, and data acquired by the data acquisition module are stored in the data storage module and are analyzed and calculated through the data processing module to obtain a temperature detection result.
As a preferable scheme of the array type optical fiber temperature detection assembly, the optical fibers are fixed on the surface of a detected object through a plurality of fixing bodies, and the fixing bodies are metal heat conducting pieces which are made of the same material as the detected object.
As a preferable scheme of the array type optical fiber temperature detection assembly, the fixing body comprises a base and a cover plate, wherein the upper surface of the base is provided with a semicircular groove with the same outer diameter as the optical fiber and a slot for fixing the cover plate; the lower surface of the cover plate is provided with a semicircular groove with the same outer diameter as the optical fiber and a protruding part matched with the slot; and the base and the cover plate are provided with vertical through holes, and the base and the cover plate are fixed by penetrating through the through holes through the connecting piece.
As a preferable scheme of the array type optical fiber temperature detection assembly, the optical fibers are fixed between the semicircular grooves of the base and the cover plate, and the side face of the fixed body is welded and fixed on the surface of the tested object.
As a preferred scheme of the array type optical fiber temperature detection assembly, the number of the optical fibers is one or two, an array formed by reciprocally arranging one optical fiber is a plurality of reciprocally parallel line planes with uniform intervals, or the two optical fibers are reciprocally arranged into two reciprocally parallel line planes with uniform intervals respectively and then vertically and alternately arranged to form a grid plane which is mutually interweaved, and adjacent parallel lines of each reciprocally parallel line plane are connected end to form a closed loop.
As a preferable scheme of the array type optical fiber temperature detection assembly, the data processing module is also connected with a display module for displaying a temperature detection result.
A temperature detection method based on the array type optical fiber temperature detection assembly comprises the following steps:
at T 0 The temperature detection matrixes of n rows and m columns are formed according to the arrangement of the optical fiber arrays at the moment, and are as follows:
at T i The temperature detection matrixes of n rows and m columns are formed according to the arrangement of the optical fiber arrays at the moment, and are as follows:
for T i Time temperature detection matrix A i Respectively carrying out orthogonal projection transformation on the reduced matrix P to obtain a data matrix updated with time; dividing each component in the updated data matrix by the time interval to obtain a temperature change rate matrix C i ；
Respectively calculating a temperature change rate matrix C i Finding out the norm of the middle column vector, and finding out the position of the column vector corresponding to the maximum norm, which is the position with the maximum temperature change trend, thereby extracting the target position;
and determining the position of the pipeline according to the target position, and giving out early warning.
As a preferable mode of the temperature detection method of the present invention, the reduction matrix P is obtained as follows:
by T 0 The temperature detection matrix at the moment is used as a standard, and the square matrix B is obtained by converting the following formula:
and decomposing the characteristic value of the square matrix B to obtain:
B＝UλU T
where λ is a diagonal matrix of eigenvalues by size, if λ is present k ，λ k+1 So that min { lambda } k ，1}＞＞λ k+1 Then use B k Approximation B, will { lambda } k+1 ，…，λ n Removing the corresponding eigenvalue vector to obtain a reduced matrix P composed of residual eigenvalues:
a temperature sensing system based on the array-type optical fiber temperature sensing assembly, comprising:
an initial temperature detection matrix acquisition module for acquiring a temperature detection matrix at T 0 The temperature detection matrixes of n rows and m columns are formed according to the arrangement of the optical fiber arrays at the moment, and are as follows:
a temperature detection matrix acquisition module at the detection time for acquiring the temperature of the temperature sensor at the time T i The temperature detection matrixes of n rows and m columns are formed according to the arrangement of the optical fiber arrays at the moment, and are as follows:
a temperature change rate matrix acquisition module for T i Time temperature detection matrix A i Respectively performing orthogonal projection transformation by a reduction matrix P to obtain a time-dependent moreA new data matrix; dividing each component in the updated data matrix by the time interval to obtain a temperature change rate matrix C i ；
A target position extraction module for calculating temperature change rate matrix C i Finding out the norm of the middle column vector, and finding out the position of the column vector corresponding to the maximum norm, which is the position with the maximum temperature change trend, thereby extracting the target position;
and the early warning module is used for determining the position of the pipeline according to the target position and sending out early warning.
A computer readable storage medium storing a computer program which, when executed by a processor, performs the steps of the temperature detection method as described.
Compared with the prior art, the array type optical fiber temperature detection assembly has the following beneficial effects:
aiming at the conventional common point type or line type measuring method for detecting the temperature of the industrial pipeline, the method can only generally reflect the temperature or stress condition of the wall surface of the pipeline, can not reflect the change of the state of the pipeline, such as the temperature or stress, caused by the flowing direction of the medium in the pipeline, and is not easy to realize the analysis or prediction of the abnormal state of the pipeline. The invention adopts the fixed optical fibers on the surface of the measured object, the optical fibers are reciprocally arranged into the optical fiber array, the optical fiber array can be a plurality of reciprocally parallel line planes with uniform intervals or grid planes which are mutually interwoven, and the adjacent parallel lines are connected end to form a closed loop, thus realizing the automatic continuous monitoring of the surface temperature or the stress state of the large-area object.
Compared with the prior art, the temperature detection method has the following beneficial effects:
the method has the advantages that the real-time performance is good, the precision is high, the change of states such as temperature or stress caused by the flowing direction of a medium in the pipeline can be reflected, and the analysis or prediction of abnormal states of the pipeline can be dynamically and accurately realized.
Further, the temperature detection method of the present invention, when obtaining the reduced matrix, if λ exists k ，λ k+1 So that min { lambda } k ，1}＞＞λ k+1 The eigenvalues of this matrix are believed to dissipate very quickly at this time, as can be seen approximately from the optimal value k, at which time B can be used k Approximation B, will { lambda } k+1 ，…，λ n Vector removal of the sum of the corresponding eigenvalues, error sum λ of this approximation k+1 Is of an order of magnitude. Therefore, the process keeps most information of the original matrix, and the obtained reduced matrix is composed of the characteristic values because the characteristic values and the characteristic vectors of the reduced matrix are very small and the noise of the data is usually corresponding to the characteristic values, so that the matrix data is purer.
Drawings
In order to more clearly illustrate the technical solutions of the embodiments of the present invention, the drawings that are needed in the embodiments will be briefly described below, it being understood that the following drawings only illustrate some embodiments of the present invention, and that other related drawings can be obtained according to these drawings without inventive effort for a person skilled in the art.
FIG. 1 is a schematic diagram showing an assembly structure of an array type optical fiber temperature detecting assembly according to an embodiment of the present invention;
FIG. 2 is a schematic view of a fixture structure in an array-type optical fiber temperature detecting assembly according to an embodiment of the present invention;
FIG. 3 is a flow chart of a temperature detection method according to an embodiment of the present invention;
in the accompanying drawings: 1-a fixed body; 2-an optical fiber array; 3-a data acquisition module; 4-a data storage module; a 5-data processing module; 6-a display module; 7-a base; 8-cover plate; 9-a semicircular groove; 10-slots; 11-a boss; 12-through holes.
Detailed Description
The following description of the embodiments of the present invention will be made clearly and completely with reference to the accompanying drawings, in which it is apparent that the embodiments described are only some embodiments of the present invention, but not all embodiments. Based on the embodiments of the present invention, one of ordinary skill in the art may also obtain other embodiments without undue burden.
The conventional measuring method for detecting the temperature of the industrial pipeline is usually only used for reflecting the temperature or stress condition of the wall surface of the pipeline, can not reflect the change of the state of the pipeline such as the temperature or stress caused by the flowing direction of the medium in the pipeline, and is not easy to realize the analysis or prediction of the abnormal state of the pipeline. In order to solve the problems, the invention provides an array type optical fiber temperature detection assembly and a detection method which have simple structure and convenient use and can realize automatic continuous measurement.
Referring to fig. 1, an array type optical fiber temperature detection assembly according to the embodiment of the invention includes an optical fiber array 2 fixed on the surface of a measured object and formed by reciprocally arranging optical fibers into an array, wherein the number of the optical fibers is one or two, the array formed by reciprocally arranging one optical fiber is a plurality of reciprocally parallel line planes with uniform intervals, or two optical fibers are reciprocally arranged into two reciprocally parallel line planes with uniform intervals respectively, and then, the reciprocally parallel line planes are vertically and alternately arranged to form a grid plane which is mutually interweaved, and adjacent parallel lines of each reciprocally parallel line plane are connected end to form a closed loop. One end of the optical fiber is sequentially connected with the data acquisition module 3, the data storage module 4, the data processing module 5 and the display module 6, and data acquired by the data acquisition module 3 are stored in the data storage module 4 and are analyzed and calculated by the data processing module 5 to obtain a temperature detection result for display.
In one possible implementation manner, the optical fibers are fixed on the surface of the measured object through a plurality of fixing bodies 1, and the fixing bodies 1 in the embodiment of the invention are metal heat conducting pieces made of the same material as the measured object, and the structure of the fixing bodies 1 is shown in fig. 2.
Referring to fig. 2, the fixing body 1 of the embodiment of the present invention includes a base 7 and a cover 8, and a semicircular groove 9 having the same outer diameter as the optical fiber is formed on the upper surface of the base 7, and a slot 10 for fixing with the cover 8. The lower surface of the cover plate 8 is also provided with a semicircular groove 9 with the same outer diameter as the optical fiber and a protruding part 11 matched with the slot 10. The optical fiber is fixed between the semicircular groove 9 of the base 7 and the cover plate 8, and the side face of the fixing body 1 is welded and fixed on the surface of the measured object. In use, the optical fiber can be clamped between the base 7 and the cover 8 by vertically aligning and locking the base 7 and the cover 8. The base 7 and the cover plate 8 are provided with vertical through holes 12, and the base 7 and the cover plate 8 are fixed by connecting pieces penetrating through the through holes 12.
The array type optical fiber temperature detection assembly provided by the embodiment of the invention adopts one optical fiber to realize automatic continuous monitoring of the surface temperature or stress state of a large-area object, and has the characteristics of simple structure, convenience in use, high detection precision and the like.
Referring to fig. 3, the detection method of the array type optical fiber temperature detection assembly according to the embodiment of the invention comprises the following steps:
s1, at T 0 The temperature detection matrixes of n rows and m columns are formed according to the arrangement of the optical fiber arrays at the moment, and are as follows:
s2, at T i The temperature detection matrixes of n rows and m columns are formed according to the arrangement of the optical fiber arrays at the moment, and are as follows:
s3, T 0 The temperature detection matrix at the moment is used as a standard, and the square matrix B is obtained by converting the following formula:
and decomposing the characteristic value of the square matrix B to obtain:
B＝UλU T
where λ is a diagonal matrix of eigenvalues by size, if λ is present k ，λ k+1 So that min { lambda } k ，1}＞＞λ k+1 The eigenvalue of this matrix is believed to dissipate very quickly at this time, as can be seen approximately from the optimal value k, then B is used k Approximation B, will { lambda } k+1 ，…，λ n Vector removal of the sum of the corresponding eigenvalues, error sum λ of this approximation k+1 Is of an order of magnitude. This process retains most of the information of the original matrix because very small eigenvalues and their eigenvectors often correspond to noise in the data, making the data cleaner. Thus, a reduction matrix P of residual eigenvalue composition is obtained:
s4, pair T i Time temperature detection matrix A i Respectively carrying out orthogonal projection transformation on the reduced matrix P to obtain a data matrix updated with time; dividing each component in the updated data matrix by the time interval to obtain a temperature change rate matrix C i ；
S5, respectively calculating a temperature change rate matrix C i Finding out the norm of the middle column vector, and finding out the position of the column vector corresponding to the maximum norm, which is the position with the maximum temperature change trend, thereby extracting the target position;
and S6, determining the position of the pipeline according to the target position, and giving out early warning.
Another embodiment of the present invention further provides a temperature detection system based on the array optical fiber temperature detection assembly, including:
an initial temperature detection matrix acquisition module for acquiring a temperature detection matrix at T 0 The temperature detection matrixes of n rows and m columns are formed according to the arrangement of the optical fiber arrays at the moment, and are as follows:
a temperature detection matrix acquisition module at the detection time for acquiring the temperature of the temperature sensor at the time T i The temperature detection matrixes of n rows and m columns are formed according to the arrangement of the optical fiber arrays at the moment, and are as follows:
a temperature change rate matrix acquisition module for T i Time temperature detection matrix A i Respectively carrying out orthogonal projection transformation on the reduced matrix P to obtain a data matrix updated with time; dividing each component in the updated data matrix by the time interval to obtain a temperature change rate matrix C i ；
A target position extraction module for calculating temperature change rate matrix C i Finding out the norm of the middle column vector, and finding out the position of the column vector corresponding to the maximum norm, which is the position with the maximum temperature change trend, thereby extracting the target position;
and the early warning module is used for determining the position of the pipeline according to the target position and sending out early warning.
Still further, the temperature detection system of the present invention further includes a reduction matrix acquisition module, where the manner in which the reduction matrix acquisition module acquires the reduction matrix P is as follows:
by T 0 The temperature detection matrix at the moment is used as a standard, and the square matrix B is obtained by converting the following formula:
and decomposing the characteristic value of the square matrix B to obtain:
B＝UλU T
where λ is a diagonal matrix of eigenvalues by size, if λ is present k ，λ k+1 So that min { lambda } k ，1}＞＞λ k+1 Then use B k Approximation B, will { lambda } k+1 ，…，λ n Removing the corresponding eigenvalue vector to obtain a reduced matrix P composed of residual eigenvalues:
another embodiment of the present invention also proposes a computer-readable storage medium storing a computer program which, when executed by a processor, implements the steps of the temperature detection method as described.
The instructions stored in the memory may be divided into one or more modules/units, which are stored in a computer-readable storage medium and executed by the processor to perform the temperature detection method of the present invention, for example. The one or more modules/units may be a series of computer readable instruction segments capable of performing a specified function, which describes the execution of the computer program in a server.
The electronic equipment can be a smart phone, a notebook computer, a palm computer, a cloud server and other computing equipment. The electronic device may include, but is not limited to, a processor, a memory. Those skilled in the art will appreciate that the electronic device may also include more or fewer components, or may combine certain components, or different components, e.g., the electronic device may also include input and output devices, network access devices, buses, etc.
The processor may be a central processing unit (Central Processing Unit, CPU), but may also be other general purpose processors, digital signal processors (Digital Signal Processor, DSP), application specific integrated circuits (Application Specific Integrated Circuit, ASIC), off-the-shelf programmable gate arrays (Field-Programmable Gate Array, FPGA) or other programmable logic devices, discrete gate or transistor logic devices, discrete hardware components, or the like. A general purpose processor may be a microprocessor or the processor may be any conventional processor or the like.
The memory may be an internal storage unit of the server, such as a hard disk or a memory of the server. The memory may also be an external storage device of the server, such as a plug-in hard disk, a Smart Media Card (SMC), a Secure Digital (SD) Card, a Flash Card (Flash Card) or the like, which are provided on the server. Further, the memory may also include both an internal storage unit and an external storage device of the server. The memory is used to store the computer readable instructions and other programs and data required by the server. The memory may also be used to temporarily store data that has been output or is to be output.
It should be noted that, because the content of information interaction and execution process between the above module units is based on the same concept as the method embodiment, specific functions and technical effects thereof may be referred to in the method embodiment section, and details thereof are not repeated herein.
It will be apparent to those skilled in the art that, for convenience and brevity of description, only the above-described division of the functional units and modules is illustrated, and in practical application, the above-described functional distribution may be performed by different functional units and modules according to needs, i.e. the internal structure of the apparatus is divided into different functional units or modules to perform all or part of the above-described functions. The functional units and modules in the embodiment may be integrated in one processing unit, or each unit may exist alone physically, or two or more units may be integrated in one unit, where the integrated units may be implemented in a form of hardware or a form of a software functional unit. In addition, specific names of the functional units and modules are only for convenience of distinguishing from each other, and are not used for limiting the protection scope of the present application. The specific working process of the units and modules in the above system may refer to the corresponding process in the foregoing method embodiment, which is not described herein again.
The integrated units, if implemented in the form of software functional units and sold or used as stand-alone products, may be stored in a computer readable storage medium. Based on such understanding, the present application implements all or part of the flow of the method of the above embodiments, and may be implemented by a computer program to instruct related hardware, where the computer program may be stored in a computer readable storage medium, where the computer program, when executed by a processor, may implement the steps of each of the method embodiments described above. Wherein the computer program comprises computer program code which may be in source code form, object code form, executable file or some intermediate form etc. The computer readable medium may include at least: any entity or device capable of carrying computer program code to a photographing device/terminal apparatus, recording medium, computer Memory, read-Only Memory (ROM), random access Memory (RAM, random Access Memory), electrical carrier signals, telecommunications signals, and software distribution media. Such as a U-disk, removable hard disk, magnetic or optical disk, etc.
In the foregoing embodiments, the descriptions of the embodiments are emphasized, and in part, not described or illustrated in any particular embodiment, reference is made to the related descriptions of other embodiments.
The above embodiments are only for illustrating the technical solution of the present application, and are not limiting; although the present application has been described in detail with reference to the foregoing embodiments, it should be understood by those of ordinary skill in the art that: the technical scheme described in the foregoing embodiments can be modified or some technical features thereof can be replaced by equivalents; such modifications and substitutions do not depart from the spirit and scope of the technical solutions of the embodiments of the present application, and are intended to be included in the scope of the present application.
Claims (10)
1. An array type optical fiber temperature detection assembly, which is characterized in that: the optical fiber array (2) is fixed on the surface of a measured object, and is formed by arranging optical fibers in a reciprocating manner, wherein the array is a plurality of reciprocating parallel line planes with uniform intervals or grid planes which are interwoven with each other, and adjacent parallel lines are connected end to form a closed loop; one end of the optical fiber is sequentially connected with the data acquisition module (3), the data storage module (4) and the data processing module (5), and data acquired by the data acquisition module (3) are stored in the data storage module (4) and are analyzed and calculated through the data processing module (5) to obtain a temperature detection result.
2. The arrayed optical fiber temperature sensing assembly of claim 1, wherein: the optical fibers are fixed on the surface of the measured object through a plurality of fixing bodies (1), and the fixing bodies (1) are metal heat conducting pieces made of the same material as the measured object.
3. The arrayed optical fiber temperature sensing assembly of claim 2, wherein: the fixing body (1) comprises a base (7) and a cover plate (8), wherein a semicircular groove (9) with the same outer diameter as the optical fiber is formed in the upper surface of the base (7), and a slot (10) for fixing the cover plate (8) is formed in the upper surface of the base; the lower surface of the cover plate (8) is provided with a semicircular groove (9) with the same outer diameter as the optical fiber and a protruding part (11) matched with the slot (10); the base (7) and the cover plate (8) are provided with vertical through holes (12), and the base (7) and the cover plate (8) are fixed by penetrating through the through holes (12) through the connecting piece.
4. The arrayed optical fiber temperature sensing assembly of claim 3, wherein: the optical fiber is fixed between the base (7) and the semicircular groove (9) of the cover plate (8), and the side face of the fixing body (1) is welded and fixed on the surface of the measured object.
5. The arrayed optical fiber temperature sensing assembly of claim 1, wherein: the optical fibers are arranged in number in one or two, the array formed by the reciprocating arrangement of one optical fiber is a plurality of reciprocating parallel line planes with uniform intervals, or the two optical fibers are respectively and reciprocally arranged into two reciprocating parallel line planes with uniform intervals and then are vertically and alternately arranged to form a grid plane which is mutually interweaved, and adjacent parallel lines of each reciprocating parallel line plane are connected end to form a closed loop.
6. The arrayed optical fiber temperature sensing assembly of claim 1, wherein: the data processing module (5) is also connected with a display module (6) for displaying the temperature detection result.
7. A temperature detection method based on the array type optical fiber temperature detection assembly as claimed in any one of claims 1 to 6, comprising the steps of:
at T 0 The temperature detection matrixes of n rows and m columns are formed according to the arrangement of the optical fiber arrays at the moment, and are as follows:
at T i The temperature detection matrixes of n rows and m columns are formed according to the arrangement of the optical fiber arrays at the moment, and are as follows:
for T i Time temperature detection matrix A i Respectively carrying out orthogonal projection transformation on the reduced matrix P to obtain a data matrix updated with time; dividing each component in the updated data matrix by the time interval to obtain a temperature change rate matrix C i ；
Respectively calculating a temperature change rate matrix C i Finding out the norm of the middle column vector, and finding out the position of the column vector corresponding to the maximum norm, which is the position with the maximum temperature change trend, thereby extracting the target position;
and determining the position of the pipeline according to the target position, and giving out early warning.
8. The method for detecting temperature according to claim 7, wherein the reduction matrix P is obtained by:
by T 0 The temperature detection matrix at the moment is used as a standard, and the square matrix B is obtained by converting the following formula:
and decomposing the characteristic value of the square matrix B to obtain:
B＝UλU T
where λ is a diagonal matrix of eigenvalues by size, if λ is present k ，λ k+1 So that min { lambda } k ，1}＞＞λ k+1 Then use B k Approximation B, will { lambda } k+1 ，…，λ n Removing the corresponding eigenvalue vector to obtain a reduced matrix P composed of residual eigenvalues:
9. a temperature sensing system based on the arrayed optical fiber temperature sensing assembly of any one of claims 1-6, comprising:
an initial temperature detection matrix acquisition module for acquiring a temperature detection matrix at T 0 The temperature detection of n rows and m columns is formed according to the arrangement of the optical fiber arrays at the moment
The matrix was measured as follows:
a temperature detection matrix acquisition module at the detection time for acquiring the temperature of the temperature sensor at the time T i The temperature detection matrixes of n rows and m columns are formed according to the arrangement of the optical fiber arrays at the moment, and are as follows:
a temperature change rate matrix acquisition module for T i Time temperature detection matrix A i Respectively reduced by matrix PpositivePerforming cross projection transformation to obtain a data matrix updated with time; dividing each component in the updated data matrix by the time interval to obtain a temperature change rate matrix C i ；
A target position extraction module for calculating temperature change rate matrix C i Finding out the norm of the middle column vector, and finding out the position of the column vector corresponding to the maximum norm, which is the position with the maximum temperature change trend, thereby extracting the target position;
and the early warning module is used for determining the position of the pipeline according to the target position and sending out early warning.
10. A computer-readable storage medium storing a computer program, characterized in that: the computer program when executed by a processor implements the steps of the temperature detection method as claimed in claim 7.
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| CN202310045765.6A CN116358732A (en) | 2023-01-30 | 2023-01-30 | Array type optical fiber temperature detection assembly and detection method |
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| CN117112385B (en) * | 2023-10-18 | 2024-01-26 | 四川酷比通信设备有限公司 | Mobile terminal performance test system based on data analysis |
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