CN108693164A - Temperature demodulation method, apparatus and system based on fiber raman scattering signal - Google Patents

Abstract

The present invention provides a kind of temperature demodulation method, apparatus and system based on fiber raman scattering signal, it is related to temperature sensor technology field, obtains two kinds of fiber raman scattering signals at the current time of the target optical fiber measurement point for the target monitoring point that temperature sensing device is acquired;It is weighted average calculating operation in conjunction with the stabilization signal of last moment, obtains the stabilization signal of two kinds of fiber raman scattering signals at the current time of target optical fiber measurement point, and calculate the ratio of its stabilization signal;It is weighted average calculating operation than value stabilization data in conjunction with last moment, is obtained than value stabilization data;According to this than value stabilization data and presetting database, the temperature data of target monitoring point is obtained.The present invention carries out handling with the weighted average of the data of last moment respectively to the ratio of two kinds of fiber raman scattering signals and the two stabilization signal respectively, keep the signal of mutation more smooth, the abnormal signal caused by ambient noise factor is effectively reduced, the measurement of temperature is more stablized, is accurate.

Description

Temperature demodulation method, device and system based on optical fiber Raman scattering signal

technical field

The invention relates to the technical field of temperature sensing, in particular to a temperature demodulation method, device and system based on optical fiber Raman scattering signals.

Background technique

The optical fiber Raman temperature measurement system is a kind of distributed, continuous and real-time measurement of spatial temperature field distribution, which is realized by using the spontaneous Raman scattering effect in the optical fiber combined with Optical Time Domain Reflectometry (OTDR). New sensor system. Compared with traditional electronic temperature sensors, the optical fiber Raman temperature measurement system has the advantages of anti-electromagnetic interference, high-voltage resistance, and simple structure, so it is widely used in power cable temperature monitoring, structural health monitoring, dam leakage monitoring and other fields.

At present, the temperature demodulation method based on optical fiber Raman scattering is: through the system to collect the Raman scattering signal when the light emitted by the narrow-band light source propagates in the optical fiber, and analyze the anti-Stokes light signal and the Stokes light signal in the Raman scattering signal. The X-ray signal is used for ratio calculation, and the ambient temperature is obtained according to the linear relationship between the ratio and temperature. This method has insufficient processing capacity for abnormal data caused by possible environmental noise factors, resulting in insufficient accuracy of optical fiber Raman temperature measurement results.

Contents of the invention

In view of this, the object of the present invention is to provide a temperature demodulation method, device and system based on optical fiber Raman scattering signals, respectively for optical fiber Raman scattering Stokes mercerizing demodulation signals, optical fiber Raman scattering anti-Stokes The three kinds of data, the demodulated signal of Siguang and the ratio data of the two stable signals, are respectively processed with the weighted average of the data at the previous moment, so that the sudden signal is smoother, and the abnormal signal caused by environmental noise factors is effectively reduced. The temperature measurement is more stable and accurate.

In the first aspect, the embodiment of the present invention provides a temperature demodulation method based on optical fiber Raman scattering signal, including:

Obtain two kinds of optical fiber Raman scattering signals at the current moment of the target optical fiber measurement point of the target monitoring point collected by the temperature sensing device; the two optical fiber Raman scattering signals are: optical fiber Raman scattering Stokes light demodulation signal , fiber Raman scattering anti-Stokes optical demodulation signal;

Combining the stable signals of the two fiber Raman scattering signals at the previous moment, the weighted average operation is performed on the two fiber Raman scattering signals at the current moment to obtain the stability of the two fiber Raman scattering signals at the current moment of the target fiber measurement point Signal;

Calculate the ratio of the stable signals of the two fiber Raman scattering signals at the current moment;

Combined with the ratio stability data at the previous moment, the weighted average operation is performed on the ratio at the current moment to obtain the ratio stability data at the current moment of the target optical fiber measurement point;

The temperature data of the target monitoring point is obtained according to the ratio stability data at the current moment of the target optical fiber measuring point and the preset database.

In combination with the first aspect, the embodiment of the present invention provides the first possible implementation manner of the first aspect, wherein, combining the stable signals of the two kinds of optical fiber Raman scattering signals at the previous moment, the two kinds of optical fiber Raman scattering signals at the current moment are Before the weighted average operation is performed on the Mann scattering signal to obtain the stable signal of the two kinds of optical fiber Raman scattering signals at the current moment of the target optical fiber measurement point, it also includes:

Perform filtering processing on the two kinds of fiber optic Raman scattering signals at the current moment respectively, and obtain two kinds of fiber optic Raman scattering signals after filtering;

Perform sliding average processing on the filtered two fiber Raman scattering signals to obtain two average signals; the two average signals are: fiber Raman scattering Stokes light demodulation average signal, fiber Raman scattering anti-Stow Max light demodulated averaged signal.

In combination with the first aspect, the embodiment of the present invention provides a second possible implementation manner of the first aspect, wherein, combining the stable signals of the two kinds of optical fiber Raman scattering signals at the previous moment, the two kinds of optical fiber Raman scattering signals at the current moment Scattering signals are weighted and averaged to obtain stable signals of the two kinds of optical fiber Raman scattering signals at the current moment of the target optical fiber measurement point, including:

The weighted average operation is performed on the stable signal of the fiber Raman scattering Stokes light demodulation signal at the previous moment and the fiber Raman scattering Stokes light demodulation average signal to obtain the fiber Raman scattering Stokes light demodulation signal at the current moment The stable signal of the Max light demodulation signal;

The weighted average operation is performed on the stable signal of the fiber Raman scattering anti-Stokes optical demodulation signal at the previous moment and the average signal of the fiber Raman scattering anti-Stokes optical demodulation signal to obtain the fiber Raman scattering at the current moment Stabilized signal for anti-Stokes optically demodulated signal.

In combination with the first aspect, the embodiment of the present invention provides a third possible implementation manner of the first aspect, wherein calculating the ratio of the stable signals of the two fiber Raman scattering signals at the current moment specifically includes:

Using the stable signal of the fiber Raman scattering Stokes light demodulation signal at the current moment, divided by the stable signal of the fiber Raman scattering anti-Stokes light demodulation signal at the current moment, two kinds of fiber Raman scattering signals are obtained The ratio of the stable signal of .

In combination with the first aspect, the embodiment of the present invention provides a fourth possible implementation of the first aspect, wherein, at the current moment of acquiring the target optical fiber measurement point of the target monitoring point collected by the temperature sensing device Before the Mann scattered signal, also include:

According to the length data of the optical fiber at the project site, the quantity of the target optical fiber measurement points of the target monitoring point is determined.

In combination with the first aspect, the embodiment of the present invention provides a fifth possible implementation manner of the first aspect, wherein, when there are multiple target optical fiber measurement points, the ratio stabilization data at the current moment of the target optical fiber measurement point and Preset the database to obtain the temperature data of the target monitoring point, including:

Calculate the average value of the ratio stability data at the current moment of multiple target optical fiber measurement points to obtain the ratio stability data at the current moment of the target monitoring point;

Taking the ratio stability data at the current moment of the target monitoring point as a keyword, searching from the temperature-ratio relationship information in the preset database, and obtaining a temperature value that matches the ratio stability data at the current moment of the target monitoring point;

The temperature value is corrected according to the preset parameters in the preset database to obtain the temperature data of the target monitoring point.

In combination with the first aspect, the embodiment of the present invention provides a sixth possible implementation manner of the first aspect, wherein the temperature data of the target monitoring point is obtained according to the ratio stabilization data at the current moment of the target optical fiber measurement point and the preset database After that, also include:

Send the temperature data to the display terminal, so that the display terminal can display the temperature data.

In the second aspect, the embodiment of the present invention also provides a temperature demodulation device based on optical fiber Raman scattering signal, including:

The signal acquisition module is used to obtain two kinds of optical fiber Raman scattering signals at the current moment of the target optical fiber measurement point of the target monitoring point collected by the temperature sensing device; the two kinds of optical fiber Raman scattering signals are: optical fiber Raman scattering Stowe Demodulation signal of Stokes light, anti-Stokes light demodulation signal of fiber Raman scattering;

The first calculation module is used to combine the stable signals of the two kinds of optical fiber Raman scattering signals at the previous moment, and perform a weighted average operation on the two kinds of optical fiber Raman scattering signals at the current moment to obtain the two kinds of optical fiber Raman scattering signals at the current moment of the target optical fiber measurement point. Stable signal of optical fiber Raman scattering signal;

The second calculation module is used to calculate the ratio of the stable signals of the two kinds of optical fiber Raman scattering signals at the current moment;

The third calculation module is used to combine the ratio stability data at the previous moment to perform a weighted average operation on the ratio at the current moment to obtain the ratio stability data at the current moment of the target optical fiber measurement point;

The temperature determination module is used to obtain the temperature data of the target monitoring point according to the ratio stability data at the current moment of the target optical fiber measurement point and the preset database.

In the third aspect, the embodiment of the present invention also provides a temperature demodulation system based on optical fiber Raman scattering signal, including: a processor, a temperature sensing device, and a display terminal;

The temperature demodulation device based on the optical fiber Raman scattering signal as described in the second aspect is installed on the processor;

The processor communicates with the temperature sensing device and the display terminal respectively.

In a fourth aspect, an embodiment of the present invention further provides a computer-readable medium having a non-volatile program code executable by a processor, and the program code causes the processor to execute the method described in the first aspect.

Embodiments of the present invention bring the following beneficial effects:

The temperature demodulation method based on optical fiber Raman scattering signal provided by the embodiment of the present invention firstly obtains two kinds of optical fiber Raman scattering signals at the current moment of the target optical fiber measurement point of the target monitoring point collected by the temperature sensing device; The Raman scattering signals are: optical fiber Raman scattering Stokes optical demodulation signal, optical fiber Raman scattering anti-Stokes optical demodulation signal; combined with the stable signal of the two optical fiber Raman scattering signals at the previous moment, Perform weighted average calculation on the two kinds of fiber Raman scattering signals at the current moment to obtain the stable signals of the two kinds of fiber Raman scattering signals at the current moment of the target fiber measurement point; calculate the stable signals of the two kinds of fiber Raman scattering signals at the current moment Combined with the ratio stability data at the previous moment, the weighted average operation is performed on the ratio at the current moment to obtain the ratio stability data at the current moment of the target optical fiber measurement point; according to the ratio stability data at the current moment of the target fiber measurement point and the preset database to obtain the temperature data of the target monitoring point. In the embodiment of the present invention, the three kinds of data, namely, the optical fiber Raman scattering Stokes mercerizing demodulation signal, the optical fiber Raman scattering anti-Stokes light demodulation signal, and the ratio data of the two stable signals, are respectively compared with those at the previous moment. The weighted average processing of data makes the sudden signal smoother, effectively reduces the abnormal signal caused by environmental noise factors, and makes the temperature measurement more stable and accurate.

Additional features and advantages of the invention will be set forth in the description which follows, and in part will be apparent from the description, or may be learned by practice of the invention. The objectives and other advantages of the invention will be realized and attained by the structure particularly pointed out in the written description and claims hereof as well as the appended drawings.

In order to make the above-mentioned objects, features and advantages of the present invention more comprehensible, preferred embodiments will be described in detail below together with the accompanying drawings.

Description of drawings

In order to more clearly illustrate the specific implementation of the present invention or the technical solutions in the prior art, the following will briefly introduce the accompanying drawings that need to be used in the specific implementation or description of the prior art. Obviously, the accompanying drawings in the following description The drawings show some implementations of the present invention, and those skilled in the art can obtain other drawings based on these drawings without any creative work.

FIG. 1 is a flow chart of a temperature demodulation method based on optical fiber Raman scattering signals provided by Embodiment 1 of the present invention;

2 is a flow chart of another temperature demodulation method based on optical fiber Raman scattering signals provided by Embodiment 1 of the present invention;

3 is a flow chart of another temperature demodulation method based on optical fiber Raman scattering signals provided by Embodiment 1 of the present invention;

4 is a flow chart of another temperature demodulation method based on optical fiber Raman scattering signals provided by Embodiment 1 of the present invention;

FIG. 5 is a flow chart of another temperature demodulation method based on optical fiber Raman scattering signals provided by Embodiment 1 of the present invention;

6 is a schematic diagram of a temperature demodulation device based on optical fiber Raman scattering signals provided by Embodiment 2 of the present invention;

FIG. 7 is a schematic diagram of a temperature demodulation system based on optical fiber Raman scattering signals provided by Embodiment 3 of the present invention.

Detailed ways

In order to make the purpose, technical solutions and advantages of the embodiments of the present invention clearer, the technical solutions of the present invention will be clearly and completely described below in conjunction with the accompanying drawings. Obviously, the described embodiments are part of the embodiments of the present invention, not all of them. the embodiment. Based on the embodiments of the present invention, all other embodiments obtained by persons of ordinary skill in the art without making creative efforts belong to the protection scope of the present invention.

The existing temperature demodulation method based on optical fiber Raman scattering only calculates the ratio between the anti-Stokes light signal and the Stokes light signal in the Raman scattering signal, and obtains the ambient temperature according to the linear relationship between the ratio and temperature , Insufficient processing ability for abnormal data caused by possible environmental noise factors, resulting in insufficient accuracy of optical fiber Raman temperature measurement results.

Based on this, the embodiments of the present invention provide a temperature demodulation method, device and system based on optical fiber Raman scattering signals, respectively for optical fiber Raman scattering Stokes mercerizing demodulation signals, optical fiber Raman scattering anti-Stokes light The demodulated signal and the ratio data of the two stable signals are respectively weighted and averaged with the data at the previous moment to make the sudden signal smoother and effectively reduce the abnormal signal caused by environmental noise factors. The measurement is more stable and accurate.

In order to facilitate the understanding of this embodiment, a method for temperature demodulation based on optical fiber Raman scattering signals disclosed in the embodiment of the present invention is firstly introduced in detail.

Embodiment one:

The embodiment of the present invention provides a temperature demodulation method based on optical fiber Raman scattering signal, the method is executed on the processor side, as shown in Figure 1, the method includes the following steps:

S101: Obtain two kinds of optical fiber Raman scattering signals at the current moment of the target optical fiber measurement point of the target monitoring point collected by the temperature sensing device; the two optical fiber Raman scattering signals are: optical fiber Raman scattering Stokes photolysis modulated signal, fiber Raman scattering anti-Stokes light demodulated signal.

During specific implementation, first the processor acquires the optical fiber Raman scattering signal of the target optical fiber measurement point of the target monitoring point collected by the temperature sensing device, wherein one target monitoring point can correspond to one target optical fiber measurement point or multiple target optical fiber measurement points point. For the determination process of the number of specific target optical fiber measurement points, refer to the subsequent steps. The optical fiber Raman scattering signal corresponding to a target optical fiber measurement point includes: optical fiber Raman scattering Stokes light demodulation signal, optical fiber Raman scattering anti-Stokes light demodulation signal.

S102: Combining the stable signals of the two fiber Raman scattering signals at the previous moment, perform a weighted average operation on the two fiber Raman scattering signals at the current moment to obtain the two fiber Raman scattering signals at the current moment of the target fiber measurement point stable signal.

In view of the acquired optical fiber Raman scattering Stokes light demodulation signal and optical fiber Raman scattering anti-Stokes light demodulation signal, combined with the stable signals at the previous moment corresponding to these two signals, the The weighted average operation is performed on the two signals, and the weight factor can be determined and adjusted according to the historical closeness between the average value of the signal value at the previous moment and the current moment and the historical data. The higher the historical closeness, the greater the weight, and the higher the historical closeness. The lower the weight, the smaller the weight.

S103: Calculate the ratio of the stable signals of the two optical fiber Raman scattering signals at the current moment.

Specifically, using the stable signal of the optical fiber Raman scattering Stokes light demodulation signal at the current moment, divided by the stable signal of the fiber Raman scattering anti-Stokes light demodulation signal at the current moment, two kinds of optical fiber pulling The ratio of the Mann scattered signal to the stable signal.

S104: Combining the ratio stability data at the previous moment, perform a weighted average operation on the ratio at the current moment to obtain the ratio stability data at the current moment of the target optical fiber measurement point.

After calculating the ratio of the stable signals of the two optical fiber Raman scattering signals at the current moment, further combining the ratio stability data at the previous moment, the weighted average operation is performed on the ratio at the current moment to obtain the ratio at the current moment of the target optical fiber measurement point stable data. The weight factor in the weighted average operation can be determined and adjusted according to the historical closeness between the average value of the ratio value at the previous moment and the current moment and the historical data. The higher the historical closeness, the greater the weight, and the lower the historical closeness, the higher the weight. Small.

S105: Obtain the temperature data of the target monitoring point according to the ratio stabilization data at the current moment of the target optical fiber measurement point and the preset database.

The aforementioned preset database includes the temperature-ratio relationship, and other preset parameters, such as sensitivity parameters, calibration data, and the like. According to the ratio stability data at the current moment of the target optical fiber measurement point, the temperature value corresponding to the ratio stability data can be found from the temperature-ratio relationship in the preset database, and further according to other preset parameters in the preset database , adjust and calibrate the temperature value to obtain the final temperature data of the target monitoring point.

As a preferred embodiment, in step S102: combining the stable signals of the two kinds of optical fiber Raman scattering signals at the previous moment, performing a weighted average operation on the two kinds of optical fiber Raman scattering signals at the current moment to obtain the current value of the target optical fiber measurement point Before the stable signal of the two kinds of optical fiber Raman scattering signals, the following steps are also included, as shown in Figure 2:

S201: Perform filtering processing on the two kinds of optical fiber Raman scattering signals at the current moment, respectively, to obtain two filtered optical fiber Raman scattering signals.

S202: Perform sliding average processing on the filtered two kinds of optical fiber Raman scattering signals to obtain two kinds of averaged signals.

The above two average signals are respectively: the average signal of optical fiber Raman scattering Stokes light demodulation and the average signal of optical fiber Raman scattering anti-Stokes light demodulation. After the processor obtains the fiber Raman scattering Stokes mercerized demodulation signal and the fiber Raman scattering anti-Stokes light demodulation signal collected by the temperature sensing device, there are two parts of the signal. The filtering and moving average algorithms are used for the two parts of the signal to obtain two relatively stable average signals, which can further reduce the abnormality caused by environmental noise factors and improve the accuracy and stability of temperature measurement.

Further, the above step S103: combining the stable signals of the two kinds of optical fiber Raman scattering signals at the previous moment, performing a weighted average operation on the two kinds of optical fiber Raman scattering signals at the current moment, to obtain the two kinds of optical fiber at the current moment of the target optical fiber measurement point The stable signal of the Raman scattering signal, specifically includes the following process:

The weighted average operation is performed on the stable signal of the fiber Raman scattering Stokes light demodulation signal at the previous moment and the fiber Raman scattering Stokes light demodulation average signal to obtain the fiber Raman scattering Stokes light demodulation signal at the current moment The stable signal of the X-ray demodulation signal.

The weighted average operation is performed on the stable signal of the fiber Raman scattering anti-Stokes optical demodulation signal at the previous moment and the average signal of the fiber Raman scattering anti-Stokes optical demodulation signal to obtain the fiber Raman scattering at the current moment Stabilized signal for anti-Stokes optically demodulated signal.

Before step S101: before obtaining two kinds of optical fiber Raman scattering signals of the target optical fiber measurement point collected by the temperature sensing device at the current moment, the following steps are also included, as shown in Figure 3:

S301: Determine the number of target optical fiber measurement points at the target monitoring point according to the optical fiber length data at the project site.

Concretely, the quantity of the target optical fiber measuring point corresponding to the target monitoring point can be determined according to the length data of the optical fiber at the project site. In order to improve the temperature measurement accuracy, a target fiber measurement point is set for every 0.1m fiber, for 1m fiber, there will be 10 target fiber measurement points. Then, through the above-mentioned steps S101-S104 for each target optical fiber measurement point, the ratio stability data corresponding to each target optical fiber measurement point is obtained.

In this case, the above step S105: obtain the temperature data of the target monitoring point according to the ratio stabilization data at the current moment of the target optical fiber measurement point and the preset database, specifically including the following steps, as shown in Figure 4:

S401: Calculate the average value of the ratio stability data at the current moment of multiple target optical fiber measurement points to obtain the ratio stability data at the current moment of the target monitoring point.

After the ratio stabilization data corresponding to each target optical fiber measurement point is obtained, the average value calculation is performed on a plurality of ratio stabilization data, so as to obtain the ratio stabilization data at the current moment of the target monitoring point. Then execute the following steps S402 and S403.

S402: Using the ratio stability data at the current moment of the target monitoring point as a keyword, search from the temperature-ratio relationship information in the preset database to obtain a temperature value that matches the ratio stability data at the current moment of the target monitoring point.

S403: Correct the temperature value according to the preset parameters in the preset database to obtain the temperature data of the target monitoring point.

According to the ratio stability data at the current moment of the target monitoring point, after retrieving and matching the temperature value from the preset database, and then adjusting and correcting the temperature through the preset parameters in the database, the final temperature data of the target monitoring point is obtained. This process can be combined with the actual optical fiber length data on site to perform multiple data collection and weighted average processing on multiple target optical fiber measurement points at the same on-site monitoring point, and more accurate temperature data can be obtained.

In step S105: after obtaining the temperature data of the target monitoring point according to the ratio stabilization data at the current moment of the target optical fiber measurement point and the preset database, the following steps are also included, as shown in Figure 5:

S501: Send the temperature data to the display terminal, so that the display terminal can display the temperature data.

The above-mentioned display terminals include various types of display devices, such as desktop computers, smart phones, iPads, and the like. The temperature data of the target monitoring point is displayed through the client page on the display terminal, which is convenient for users to refer to and judge for subsequent operations.

The temperature demodulation method based on the optical fiber Raman scattering signal provided by the embodiment of the present invention separately performs the optical fiber Raman scattering Stokes mercerization demodulation signal, the optical fiber Raman scattering anti-Stokes light demodulation signal, and both The three kinds of data of the ratio data of the stable signal are respectively weighted and averaged with the data at the previous moment to make the sudden signal smoother, effectively reduce the abnormal signal caused by environmental noise factors, and make the temperature measurement more stable and accurate. In addition, the number of target fiber measurement points at the same site monitoring point can be determined in combination with the actual fiber length data on site, and multiple data collection and weighted average processing can be performed on multiple target fiber measurement points at the same site monitoring point to increase system robustness. Improve sensing accuracy and get more accurate temperature data.

Embodiment two:

The embodiment of the present invention also provides a temperature demodulation device based on optical fiber Raman scattering signal, as shown in Figure 6, the device includes: a signal acquisition module 21, a first calculation module 22, a second calculation module 23, a third Module 24, temperature determination module 25.

Wherein, the signal acquisition module 21 is used to obtain two kinds of optical fiber Raman scattering signals at the current moment of the target optical fiber measurement point of the target monitoring point collected by the temperature sensing device; the two kinds of optical fiber Raman scattering signals are respectively: optical fiber Raman Scattering Stokes light demodulation signal, optical fiber Raman scattering anti-Stokes light demodulation signal; the first calculation module 22 is used to combine the stable signals of the two kinds of fiber Raman scattering signals at the previous moment, and the current The two kinds of optical fiber Raman scattering signals at the time are weighted and averaged to obtain the stable signals of the two kinds of optical fiber Raman scattering signals at the current moment of the target optical fiber measurement point; the second calculation module 23 is used to calculate the two kinds of optical fiber Raman scattering signals at the current moment. The ratio of the stable signal of the Mann scattering signal; the third calculation module 24, used to combine the ratio stable data of the previous moment, carry out a weighted average operation to the ratio of the current moment, and obtain the ratio stable data of the current moment of the target optical fiber measurement point; temperature The determination module 25 is used to obtain the temperature data of the target monitoring point according to the ratio stability data at the current moment of the target optical fiber measurement point and the preset database.

In the temperature demodulation device based on optical fiber Raman scattering signal provided by the embodiment of the present invention, each module has the same technical characteristics as the above-mentioned temperature demodulation method based on optical fiber Raman scattering signal, so the above functions can also be realized. For the specific working process of each module in the device, refer to the above-mentioned method embodiments, and details are not repeated here.

Embodiment three:

The embodiment of the present invention also provides a temperature demodulation system based on optical fiber Raman scattering signal, as shown in FIG. 7, the system includes: a processor 32, a temperature sensing device 31 and a display terminal 33; The temperature demodulation device 321 based on the optical fiber Raman scattering signal described in the second embodiment; the processor 32 are connected in communication with the temperature sensing device 31 and the display terminal 33 respectively.

The temperature demodulation system based on optical fiber Raman scattering signals provided by the embodiments of the present invention has the same technical features as the above-mentioned temperature demodulation device based on optical fiber Raman scattering signals, so the above functions can also be realized. For the specific working process of each module in the system, please refer to the above-mentioned method embodiments, and details will not be repeated here.

The computer program product of the temperature demodulation method based on the optical fiber Raman scattering signal provided by the embodiment of the present invention includes a computer-readable storage medium storing non-volatile program code executable by the processor, and the program code includes The instructions can be used to execute the methods described in the foregoing method embodiments. For specific implementation, please refer to the method embodiments, which will not be repeated here.

Those skilled in the art can clearly understand that for the convenience and brevity of the description, the specific working process of the above-described device and electronic equipment can refer to the corresponding process in the foregoing method embodiment, which will not be repeated here.

The flowchart and block diagrams in the figures illustrate the architecture, functionality, and operation of possible implementations of methods and computer program products according to various embodiments of the present invention. In this regard, each block in a flowchart or block diagram may represent a module, program segment, or part of code that includes one or more Executable instructions. It should also be noted that, in some alternative implementations, the functions noted in the block may occur out of the order noted in the figures. For example, two blocks in succession may, in fact, be executed substantially concurrently, or they may sometimes be executed in the reverse order, depending upon the functionality involved. It should also be noted that each block of the block diagrams and/or flowchart illustrations, and combinations of blocks in the block diagrams and/or flowchart illustrations, can be implemented by a dedicated hardware-based system that performs the specified function or action , or may be implemented by a combination of dedicated hardware and computer instructions.

In the description of the present invention, it should be noted that the terms "center", "upper", "lower", "left", "right", "vertical", "horizontal", "inner", "outer" etc. The indicated orientation or positional relationship is based on the orientation or positional relationship shown in the drawings, and is only for the convenience of describing the present invention and simplifying the description, rather than indicating or implying that the referred device or element must have a specific orientation, or in a specific orientation. construction and operation, therefore, should not be construed as limiting the invention. In addition, the terms "first", "second", and "third" are used for descriptive purposes only, and should not be construed as indicating or implying relative importance.

In the several embodiments provided in this application, it should be understood that the disclosed systems, devices and methods may be implemented in other ways. The device embodiments described above are only illustrative. For example, the division of the units is only a logical function division. In actual implementation, there may be other division methods. For example, multiple units or components can be combined or May be integrated into another system, or some features may be ignored, or not implemented. In another point, the mutual coupling or direct coupling or communication connection shown or discussed may be through some communication interfaces, and the indirect coupling or communication connection of devices or units may be in electrical, mechanical or other forms.

The units described as separate components may or may not be physically separated, and the components displayed as units may or may not be physical units, that is, they may be located in one place, or may be distributed to multiple network units. Part or all of the units can be selected according to actual needs to achieve the purpose of the solution of this embodiment.

In addition, each functional unit in each embodiment of the present invention may be integrated into one processing unit, each unit may exist separately physically, or two or more units may be integrated into one unit.

If the functions are realized in the form of software function units and sold or used as independent products, they can be stored in a non-volatile computer-readable storage medium executable by a processor. Based on this understanding, the essence of the technical solution of the present invention or the part that contributes to the prior art or the part of the technical solution can be embodied in the form of a software product, and the computer software product is stored in a storage medium, including Several instructions are used to make a computer device (which may be a personal computer, a server, or a network device, etc.) execute all or part of the steps of the methods described in various embodiments of the present invention. The aforementioned storage medium includes: U disk, mobile hard disk, read-only memory (ROM, Read-Only Memory), random access memory (RAM, Random Access Memory), magnetic disk or optical disk and other media that can store program codes. .

Finally, it should be noted that: the above-described embodiments are only specific implementations of the present invention, used to illustrate the technical solutions of the present invention, rather than limiting them, and the scope of protection of the present invention is not limited thereto, although referring to the foregoing The embodiment has described the present invention in detail, and those skilled in the art should understand that any person familiar with the technical field can still modify the technical solutions described in the foregoing embodiments within the technical scope disclosed in the present invention Changes can be easily thought of, or equivalent replacements are made to some of the technical features; and these modifications, changes or replacements do not make the essence of the corresponding technical solutions deviate from the spirit and scope of the technical solutions of the embodiments of the present invention, and should be included in the scope of the present invention within the scope of protection. Therefore, the protection scope of the present invention should be based on the protection scope of the claims.

Claims (10)

1. A temperature demodulation method based on optical fiber Raman scattering signal, it is characterized in that, comprising: Obtain two kinds of optical fiber Raman scattering signals at the current moment of the target optical fiber measurement point of the target monitoring point collected by the temperature sensing device; the two kinds of optical fiber Raman scattering signals are respectively: optical fiber Raman scattering Stokes photolysis modulation signal, optical fiber Raman scattering anti-Stokes optical demodulation signal; Combining the stable signals of the two kinds of fiber Raman scattering signals at the previous moment, performing a weighted average operation on the two kinds of fiber Raman scattering signals at the current moment to obtain the two kinds of fiber Raman at the current moment of the target fiber measurement point Stabilized signal of scattered signal; Calculate the ratio of the stable signals of the two kinds of optical fiber Raman scattering signals at the current moment; Combining the ratio stability data at the previous moment, performing a weighted average operation on the ratio at the current moment to obtain the ratio stability data at the current moment of the target optical fiber measurement point; The temperature data of the target monitoring point is obtained according to the ratio stability data at the current moment of the target optical fiber measurement point and the preset database. 2. method according to claim 1, is characterized in that, in conjunction with the stable signal of two kinds of optical fiber Raman scattering signals of last moment, two kinds of optical fiber Raman scattering signals of described current moment are carried out weighted average operation, Before obtaining the stable signals of the two kinds of optical fiber Raman scattering signals at the current moment of the target optical fiber measurement point, it also includes: Performing filtering processing on the two kinds of optical fiber Raman scattering signals at the current moment, respectively, to obtain filtered two kinds of optical fiber Raman scattering signals; Carry out sliding average processing on the two kinds of optical fiber Raman scattering signals after the filtering, and obtain two kinds of average signals; The two kinds of average signals are respectively: optical fiber Raman scattering Stokes light demodulation average Scattered anti-Stokes light demodulates the averaged signal. 3. method according to claim 2, is characterized in that, described in conjunction with the stable signal of two kinds of optical fiber Raman scattering signals of last moment, carries out weighted average operation to two kinds of optical fiber Raman scattering signals of described current moment , to obtain the stable signals of the two kinds of optical fiber Raman scattering signals at the current moment of the target optical fiber measurement point, specifically including: Perform a weighted average operation on the stable signal of the optical fiber Raman scattering Stokes light demodulation signal at the previous moment and the average signal of the optical fiber Raman scattering Stokes light demodulation signal to obtain the fiber Raman scattering at the current moment Stabilized signal for Stokes optical demodulation signal; Perform a weighted average operation on the stable signal of the fiber Raman scattering anti-Stokes light demodulation signal at the previous moment and the average signal of the fiber Raman scattering anti-Stokes light demodulation signal to obtain the fiber Raman scattering anti-Stokes light demodulation signal at the current moment Mann scattering stabilizes the signal for anti-Stokes optical demodulation. 4. method according to claim 3, is characterized in that, the ratio of the stable signal of described two kinds of optical fiber Raman scattering signals of described calculation at present time, specifically comprises: Using the stable signal of the optical fiber Raman scattering Stokes light demodulation signal at the current moment, divided by the stable signal of the optical fiber Raman scattering anti-Stokes light demodulation signal at the current moment, to obtain the two The ratio of the stable signal of a fiber Raman scattering signal. 5. method according to claim 1, is characterized in that, before the two kinds of optical fiber Raman scattering signals of the current moment of the target optical fiber measurement point of the target monitoring point that described acquisition temperature sensing device gathers, also comprise: According to the length data of the optical fiber at the project site, the quantity of the target optical fiber measurement points of the target monitoring point is determined. 6. The method according to claim 1, wherein when the number of the target optical fiber measurement points is multiple, the ratio stabilization data and the preset database according to the current moment of the target optical fiber measurement points, Obtain the temperature data of the target monitoring point, specifically including: performing mean calculation on the ratio stabilization data at the current moment of the multiple target optical fiber measurement points to obtain the ratio stabilization data at the current moment of the target monitoring point; Using the ratio stability data at the current moment of the target monitoring point as a keyword, search from the temperature-ratio relationship information in the preset database, and obtain a ratio that matches the ratio stability data at the current moment of the target monitoring point temperature value; The temperature value is corrected according to the preset parameters in the preset database to obtain the temperature data of the target monitoring point. 7. The method according to claim 1, wherein, after obtaining the temperature data of the target monitoring point according to the ratio stabilization data and the preset database at the current moment of the target optical fiber measurement point, further comprising : sending the temperature data to a display terminal, so that the display terminal displays the temperature data. 8. A temperature demodulation device based on optical fiber Raman scattering signal, characterized in that, comprising: The signal acquisition module is used to obtain two kinds of optical fiber Raman scattering signals at the current moment of the target optical fiber measurement point of the target monitoring point collected by the temperature sensing device; the two kinds of optical fiber Raman scattering signals are respectively: optical fiber Raman scattering Stokes optical demodulation signal, optical fiber Raman scattering anti-Stokes optical demodulation signal; The first calculation module is used to combine the stable signals of the two kinds of optical fiber Raman scattering signals at the previous moment, and perform a weighted average operation on the two kinds of optical fiber Raman scattering signals at the current moment to obtain the current value of the target optical fiber measurement point The stable signal of the two kinds of optical fiber Raman scattering signals at time; The second calculation module is used to calculate the ratio of the stable signals of the two kinds of optical fiber Raman scattering signals at the current moment; The third calculation module is used to perform a weighted average operation on the ratio at the current moment in combination with the ratio stability data at the previous moment to obtain the ratio stability data at the current moment of the target optical fiber measurement point; The temperature determination module is used to obtain the temperature data of the target monitoring point according to the ratio stability data at the current moment of the target optical fiber measurement point and the preset database. 9. A temperature demodulation system based on optical fiber Raman scattering signals, comprising: a processor, a temperature sensing device and a display terminal; The temperature demodulation device based on the optical fiber Raman scattering signal as claimed in claim 8 is installed on the processor; The processor is communicatively connected with the temperature sensing device and the display terminal respectively. 10. A computer-readable medium having non-volatile program code executable by a processor, wherein the program code causes the processor to execute the method according to any one of claims 1 to 7 .