System and method for adaptively adjusting sensor positions in optical fiber sensing networks

Abstract

The present invention provides a system and method for adaptively adjusting the position of sensors in a fiber optic sensor network, belonging to the field of fiber grating array sensing technology. The system includes: a first signal acquisition module for acquiring at least one first sensor signal from the fiber optic sensor network; a second signal acquisition module for acquiring a second sensor signal from the fiber optic sensor network; a position adjustment module for determining the real-time positions of multiple sensors in the fiber optic sensor network based on the second sensor signal, and determining whether the positions of the multiple sensors have shifted based on the original positions and the real-time positions. When the positions of the multiple sensors have shifted, the original positions are adjusted based on the real-time positions to obtain adjusted positions; the adjusted positions are used to demodulate the first sensor signal. The present invention adjusts the sensor position in real time based on the second sensor signal without pausing the acquisition of the first sensor signal, thereby ensuring the integrity of the first sensor signal.

Description

Technical Field

[0001] The present invention relates to the field of fiber grating array sensing technology, and in particular to a system and method for adaptively adjusting the position of a sensor in a fiber optic sensing network. Background Art

[0002] Fiber Bragg grating array (FBG) sensing technology offers the advantage of long-range detection, typically reaching tens of kilometers. Tens of thousands of FBG array sensors are distributed over this area. Real-time and effective demodulation of the vibration signals collected by the sensors is a key feature of the sensing system and a crucial basis for vehicle positioning and tracking in smart highways. Accurate positioning of the sensors is a prerequisite for achieving real-time and effective demodulation of vibration signals. During the system installation and commissioning phase, the sensor position can be determined based on the raw signal collected from the sensor link. However, over time, the sensor position can shift due to external factors such as stress and temperature. When the sensor position shifts, the demodulated vibration signal becomes distorted, necessitating correction of the sensor position.

[0003] The existing solution involves stopping vibration signal acquisition, switching to raw link signal acquisition, repositioning the sensor, and then switching back to vibration signal acquisition. This approach presents the following technical issues: Sensor data interruptions and data loss occur during the switch to raw link signal acquisition, severely impacting real-time vehicle positioning and tracking.

[0004] Therefore, there is an urgent need to provide a system and method for adaptively adjusting the position of sensors in a fiber optic sensor network, which can adjust the position of the sensors without interrupting the acquisition of sensor signals. Summary of the Invention

[0005] In view of this, it is necessary to provide a system and method for adaptively adjusting the position of sensors in a fiber optic sensing network to solve the technical problem in the prior art that the sensor position needs to be adjusted only after the sensor signal acquisition is interrupted, resulting in incomplete sensor signals and affecting the real-time positioning and tracking of the vehicle.

[0006] On the one hand, in order to solve the above technical problems, the present invention provides a system for adaptively adjusting the position of sensors in a fiber optic sensor network, comprising:

[0007] A first signal acquisition module, configured to acquire at least one first sensing signal of the optical fiber sensing network;

[0008] A second signal acquisition module is used to acquire a second channel of sensing signals from the optical fiber sensing network;

[0009] A position adjustment module is used to determine the real-time positions of multiple sensors in the optical fiber sensing network based on the second sensing signal, and to determine whether the positions of the multiple sensors are offset based on the stored original positions and the real-time positions. When the positions of the multiple sensors are offset, the original positions are adjusted based on the real-time positions to obtain adjusted positions; the adjusted positions are used to demodulate the first sensing signal.

[0010] In a possible implementation, the position adjustment module includes a position determination submodule, a position offset detection submodule, and a position adjustment submodule;

[0011] The position determination submodule is used to extract multiple peaks of the second sensor signal and use the positions of the multiple peaks as the real-time positions of the multiple sensors;

[0012] The position offset detection submodule is used to determine whether the multiple sensors are offset and the number of sensors that are offset based on the original position and the real-time position;

[0013] The position adjustment submodule is used to determine the ratio of the number of sensors that have shifted to the total number of the multiple sensors, and when the ratio is greater than a preset ratio, adjust the original position based on the real-time position to obtain the adjusted position.

[0014] In a possible implementation, the position adjustment submodule includes an adjustment judgment unit and an adjustment unit;

[0015] The adjustment judgment unit is used to determine a ratio of the number of sensors that have shifted to the total number of the multiple sensors, and judge whether the ratio is greater than a preset ratio. If so, the original position needs to be adjusted; if not, the original position does not need to be adjusted;

[0016] The adjustment unit is used to align the real-time position with the original position and replace the original position with the real-time position.

[0017] In a possible implementation, the adjustment unit includes a position alignment subunit and a position replacement subunit;

[0018] The alignment subunit is configured to adjust the real-time position based on the second number of positions when the first number of positions of the real-time position is not equal to the second number of positions of the original position, so as to obtain an updated real-time position; the third number of positions of the updated real-time position is equal to the second number of positions;

[0019] The position replacement subunit is configured to obtain a real-time sampling point sequence number of the updated real-time position and an original sampling point sequence number of the original position, and replace the original position with the updated real-time position when a sequence number difference between the real-time sampling point sequence number and the original sampling point sequence number is less than a preset difference.

[0020] In a possible implementation, the alignment subunit includes a position number determination subunit, a first alignment subunit, and a second alignment subunit;

[0021] The position number judging subunit judges whether the first position number is greater than the second position number when the first position number of the real-time position is not equal to the second position number of the original position;

[0022] The first alignment subunit is configured to, when the number of the first positions is greater than the number of the second positions, determine at least two real-time positions corresponding to the original positions, and delete a real-time position having a signal peak value of the at least two real-time positions that has a large difference from a signal peak value of the original positions;

[0023] The second alignment subunit is configured to determine a missing position in the real-time position and a target original position corresponding to the missing position in the original position when the number of the first positions is less than the number of the second positions, and add the target original position to the missing position.

[0024] In a possible implementation, the system further includes a demodulation module, and the position adjustment module further includes a write-back submodule, wherein the write-back submodule is configured to write the adjusted position into the demodulation module;

[0025] The demodulation module is used to demodulate the first sensing signal based on the adjustment position to obtain demodulated data.

[0026] In a possible implementation, the system further includes a data compensation module;

[0027] The data compensation module is used to obtain original demodulated data obtained by demodulating the first sensor signal based on the original position, determine compensation data based on the original demodulated data and the demodulated data, and compensate the sensor data collected by the sensor based on the compensation data.

[0028] In a possible implementation, the data compensation module includes a compensation data determination submodule and a compensation submodule;

[0029] The compensation data determination submodule is used to obtain original demodulated data obtained by demodulating the first sensor signal based on the original position, and use the difference between the original demodulated data and the demodulated data as the compensation data;

[0030] The compensation submodule is used to obtain sensor data collected by the sensor, and use the sum of the sensor data and the compensation data as output data.

[0031] In a possible implementation, the first signal acquisition module includes a signal conditioning submodule, a voltage conversion submodule, and an analog-to-digital conversion submodule;

[0032] The signal conditioning submodule is used to filter the collected first channel initial sensor signal to obtain a filtered signal, where the first channel initial sensor signal is an analog signal;

[0033] The voltage conversion submodule is used to perform voltage conversion on the filtered signal to obtain a conversion signal;

[0034] The analog-to-digital conversion submodule is used to perform analog-to-digital conversion on the conversion signal to obtain the first-path sensing signal, which is a digital signal.

[0035] On the other hand, the present invention further provides a method for adaptively adjusting the position of a sensor in a fiber optic sensor network, which is applicable to the device for adaptively adjusting the position of a sensor in a fiber optic sensor network described in any one of the possible implementations above, and the method comprises:

[0036] collecting at least one first sensing signal of the optical fiber sensing network;

[0037] Collecting the second sensing signal of the optical fiber sensing network;

[0038] Based on the second sensing signal, the real-time positions of multiple sensors in the optical fiber sensing network are determined, and based on the stored original positions and the real-time positions, whether the positions of the multiple sensors are offset is determined; when the positions of the multiple sensors are offset, the original positions are adjusted based on the real-time positions to obtain adjusted positions; the adjusted positions are used to demodulate the first sensing signal.

[0039] The present invention has the following beneficial effects: The system for adaptively adjusting the position of sensors in a fiber optic sensor network provided by the present invention acquires a second sensor signal from the fiber optic sensor network by adding a second signal acquisition module, performs position offset determination and position adjustment based on the second sensor signal and a stored original position, obtains an adjusted position, and demodulates the first sensor signal based on the adjusted position to obtain demodulated data. The system can adjust the sensor position of the first sensor signal in real time based on the second sensor signal without pausing the acquisition of the first sensor signal, thereby ensuring the integrity of the first sensor signal. When the first sensor signal is used to locate and track a vehicle, the accuracy of the positioning and tracking is ensured. BRIEF DESCRIPTION OF THE DRAWINGS

[0040] In order to more clearly illustrate the technical solutions in the embodiments of the present invention, the following briefly introduces the drawings required for use in the description of the embodiments. Obviously, the drawings described below are only some embodiments of the present invention. For those skilled in the art, other drawings can be obtained based on these drawings without creative work.

[0041] Figure 1 A schematic structural diagram of an embodiment of a system for adaptively adjusting the position of sensors in a fiber optic sensing network provided by the present invention;

[0042] Figure 2 A schematic diagram of an embodiment of the second sensing signal provided by the present invention being offset;

[0043] Figure 3 A schematic structural diagram of an embodiment of a position adjustment submodule provided by the present invention;

[0044] Figure 4 A schematic structural diagram of an embodiment of the alignment subunit provided by the present invention;

[0045] Figure 5 A schematic structural diagram of an embodiment of a data compensation module provided by the present invention;

[0046] Figure 6 A schematic diagram of sensor signals collected during actual operation of the optical fiber sensor network provided by the present invention;

[0047] Figure 7 A schematic structural diagram of an embodiment of the first signal acquisition module provided by the present invention;

[0048] Figure 8 The present invention provides a flow chart of an embodiment of a method for adaptively adjusting the position of sensors in a fiber optic sensor network. DETAILED DESCRIPTION

[0049] The following will provide a clear and complete description of the technical solutions in the embodiments of the present invention in conjunction with the accompanying drawings. Obviously, the described embodiments are only part of the embodiments of the present invention, not all of them. Based on the embodiments of the present invention, all other embodiments obtained by those skilled in the art without creative work are within the scope of protection of the present invention.

[0050] It should be understood that the schematic drawings are not drawn to scale. The flowcharts used in the present invention illustrate operations implemented according to some embodiments of the present invention. It should be understood that the operations of the flowcharts can be implemented out of sequence, and steps that have no logical contextual relationship can be reversed in order or implemented simultaneously. In addition, those skilled in the art, guided by the content of the present invention, can add one or more other operations to the flowcharts or remove one or more operations from the flowcharts. Some of the block diagrams shown in the accompanying drawings are functional entities and do not necessarily correspond to physically or logically independent entities. These functional entities can be implemented in the form of software, or in one or more hardware modules or integrated circuits, or in different networks and / or processor systems and / or microcontroller systems.

[0051] References herein to "embodiments" mean that a particular feature, structure, or characteristic described in connection with the embodiments may be included in at least one embodiment of the present invention. The appearance of this phrase in various places in the specification does not necessarily refer to the same embodiment, nor does it constitute a separate or alternative embodiment that is mutually exclusive of other embodiments. It is understood, both explicitly and implicitly, by those skilled in the art that the embodiments described herein may be combined with other embodiments.

[0052] The present invention provides a system and method for adaptively adjusting the position of sensors in an optical fiber sensing network, which are described below.

[0053] Figure 1 This is a schematic diagram of an embodiment of the structure of a system for adaptively adjusting the position of sensors in an optical fiber sensor network provided by the present invention. Figure 1 As shown, the position adaptive adjustment system 10 of sensors in the optical fiber sensing network includes:

[0054] A first signal acquisition module 100 is used to acquire at least one first sensing signal of the optical fiber sensing network;

[0055] The second signal acquisition module 200 is used to acquire a second channel of sensing signals from the optical fiber sensing network;

[0056] The position adjustment module 300 is used to determine the real-time positions of multiple sensors in the optical fiber sensing network based on the second sensing signal, and to determine whether the positions of the multiple sensors are offset based on the stored original positions and real-time positions. When the positions of the multiple sensors are offset, the original positions are adjusted based on the real-time positions to obtain adjusted positions; the adjusted positions are used to demodulate the first sensing signal.

[0057] The optical fiber sensing network includes a plurality of sensors. In a specific embodiment of the present invention, the optical fiber sensing network is a vibration sensing network, that is, the sensors are vibration sensors.

[0058] It should be noted that the number of the first-path sensing signals can be set according to actual application scenarios. Specifically, the optical fiber sensing network includes three first-path sensing signals.

[0059] It should be understood that the number and positions of sensors corresponding to the first sensing signal and the second sensing signal are the same.

[0060] The original position stored in the position adjustment module 300 can be measured and obtained during the initialization phase of the optical fiber sensor network. Specifically, the optical fiber sensor network collects several original sensor link signals, de-noises and averages these signals, extracts the signal peak, and uses the signal peak as the original position of the sensor.

[0061] It should also be understood that: Figure 1 As shown, the system 10 for adaptively adjusting the position of sensors in a fiber optic sensor network further includes a demodulation module 400 for demodulating the first sensing signal based on the adjusted position to obtain demodulated data.

[0062] Compared to the prior art, the adaptive position adjustment system 10 for sensors in a fiber optic sensor network provided by the present invention, by additionally providing a second signal acquisition module 200 to acquire a second sensor signal from the fiber optic sensor network, performs position offset determination and position adjustment based on the second sensor signal and a stored original position to obtain an adjusted position, and then demodulates the first sensor signal based on the adjusted position to obtain demodulated data. This allows for real-time adjustment of the sensor position of the first sensor signal based on the second sensor signal, without pausing the acquisition of the first sensor signal, thereby ensuring the integrity of the first sensor signal. When the first sensor signal is used to locate and track a vehicle, the accuracy of the positioning and tracking is ensured.

[0063] When the position offset of sensors in a fiber optic sensing network occurs, it is usually due to external stress, temperature, etc., and multiple sensors are offset at the same time. The offset is the largest at the far end of the sensor link and gradually decreases towards the proximal end of the sensor link.

[0064] Based on the above position offset characteristics, in order to avoid misjudging a few sensors as having position offset when they themselves have faults, in some embodiments of the present invention, such as Figure 1 As shown, the position adjustment module 300 includes a position determination submodule 310, a position offset detection submodule 320 and a position adjustment submodule 330;

[0065] The position determination submodule 310 is used to extract multiple peaks of the second sensor signal and use the positions of the multiple peaks as the real-time positions of the multiple sensors;

[0066] The position offset detection submodule 320 is used to determine whether multiple sensors have offset and the number of sensors that have offset based on the original position and the real-time position;

[0067] The position adjustment submodule 330 is used to determine the ratio of the number of sensors that have shifted to the total number of multiple sensors. When the ratio is greater than a preset ratio, the original position is adjusted based on the real-time position to obtain an adjusted position.

[0068] The embodiment of the present invention determines the number of sensors that have shifted, and only adjusts the original position when the ratio of the number of sensors that have shifted to the total number of multiple sensors is greater than a preset ratio. This achieves accurate judgment of the occurrence of position shift, avoids misjudgment caused by failure of a few sensors, and ensures the accuracy and reliability of position adaptive adjustment.

[0069] It should be understood that the preset ratio can be set according to actual application scenarios and experience.

[0070] In a specific embodiment of the present invention, the preset ratio is 25% to 35%, preferably 30%.

[0071] The position offset detection submodule 320 determines whether an offset occurs specifically by: when the original position and the real-time position are inconsistent, it is determined that the sensor has offset.

[0072] It should be noted that the sensor offset is characterized by the peak value of the sensor signal offset, such as Figure 2 As shown, Figure 2 The solid line in the figure represents the original sensor signal, and the dotted line represents the second sensor signal. When the peak value of the second sensor signal lags behind the peak value of the original sensor signal, it indicates that the position of the sensor has shifted backward. When the peak value of the original sensor signal lags behind the peak value of the second sensor signal, it indicates that the position of the sensor has shifted forward. Figure 2 The horizontal axis is the sampling point number, and the vertical axis is the signal amplitude.

[0073] Since when a sensor is offset, it is characterized as multiple continuous sensors all being offset. Therefore, in some embodiments of the present invention, when the multiple sensors that are offset are sensors with continuous positions, the original positions are adjusted based on the real-time positions to further ensure the accuracy of the position adjustment.

[0074] Since the original position is adjusted based on the real-time position, it is necessary to ensure that the original position and the real-time position correspond one to one to achieve accurate adjustment.

[0075] Therefore, in some embodiments of the present invention, Figure 3As shown, the position adjustment submodule 330 includes an adjustment judgment unit 331 and an adjustment unit 332;

[0076] The adjustment determination unit 331 is used to determine the ratio of the number of sensors that have shifted to the total number of the multiple sensors, and determine whether the ratio is greater than a preset ratio. If so, the original position needs to be adjusted; otherwise, the original position does not need to be adjusted.

[0077] The adjustment unit 332 is used to align the real-time position with the original position and replace the original position with the real-time position.

[0078] In the embodiment of the present invention, the real-time position and the original position are aligned by setting the adjustment unit 332 to ensure that each original position has a corresponding real-time position, thereby ensuring the accuracy and reliability of the adjustment.

[0079] It should be noted that aligning the real-time position with the original position refers to achieving a one-to-one correspondence between the real-time position and the original position.

[0080] In practical applications, the offset of the position caused by temperature and stress will not be too large. When the offset is too large, it indicates that the sensor is abnormal. When the sensor is abnormal, the demodulated data is useless. In order to adjust the position offset caused by temperature and stress, in a specific embodiment of the present invention, Figure 3 As shown, the adjustment unit 332 includes a position alignment subunit 3321 and a position replacement subunit 3322;

[0081] The alignment subunit 3321 is configured to adjust the real-time position based on the second position number to obtain an updated real-time position when the first position number of the real-time position is not equal to the second position number of the original position; the third position number of the updated real-time position is equal to the second position number;

[0082] The position replacement subunit 3322 is used to obtain the real-time sampling point sequence number of the updated real-time position and the original sampling point sequence number of the original position, and when the sequence number difference between the real-time sampling point sequence number and the original sampling point sequence number is less than a preset difference, the updated real-time position is used to replace the original position.

[0083] In this embodiment of the present invention, the position replacement subunit 3322 is set to replace the original position with the updated real-time position when the difference between the real-time sampling point sequence number and the original sampling point sequence number is less than a preset difference, thereby ensuring that the position offset is caused by temperature, stress, etc. rather than sensor abnormality, thereby ensuring the availability of subsequent demodulated data.

[0084] It should be noted that: when the difference between the real-time sampling point serial number and the original sampling point serial number is greater than or equal to the preset difference, it indicates that the sensor is abnormal and no processing is required.

[0085] It should be understood that the preset difference value can be adaptively adjusted according to the accuracy of the sampling points and other parameters.

[0086] In some embodiments of the present invention, the preset difference is 1-4, specifically, the preset difference is 2.

[0087] That is, when the original sampling point sequence number is 30, the real-time sampling point sequence number is 28 to 32, and the real-time position is used to replace the original position; otherwise, no processing is performed.

[0088] In actual applications, there are three situations: the number of real-time positions is greater than the number of original positions, the number of real-time positions is less than the number of original positions, and the number of real-time positions is equal to the number of original positions. Therefore, in a specific embodiment of the present invention, Figure 4 As shown, the alignment subunit 3321 includes a position number judgment subunit 3323, a first alignment subunit 3324 and a second alignment subunit 3325;

[0089] The position number determination subunit 3323 determines whether the first position number is greater than the second position number when the first position number of the real-time position is not equal to the second position number of the original position;

[0090] The first alignment subunit 3324 is configured to, when the number of the first positions is greater than the number of the second positions, determine at least two real-time positions corresponding to the original positions, and delete a real-time position having a signal peak value that is significantly different from a signal peak value in the original positions in the at least two real-time positions;

[0091] The second alignment subunit 3325 is configured to determine missing positions in the real-time positions and target original positions corresponding to the missing positions in the original positions when the number of first positions is less than the number of second positions, and add the target original positions to the missing positions.

[0092] The embodiment of the present invention provides specific processing methods for the two situations where the number of first positions is greater than the number of second positions and the number of first positions is less than the number of second positions, thereby ensuring that the real-time position and the original position can be aligned in any scenario.

[0093] In a specific embodiment of the present invention, in the first alignment subunit 3324, if the signal peak value of the original position is 100, and there are two real-time positions corresponding to this original position, and the signal peak values ​​of the two real-time positions are 100 and 110 respectively, then the real-time position with a signal peak value of 100 is used as the position corresponding to the original position, and the real-time position with a signal peak value of 110 is deleted.

[0094] Since the accurate demodulation of the demodulation module 400 depends on the adjustment position, in order to ensure the reliability of the adjustment position being transmitted to the demodulation module 400, in some embodiments of the present invention, such as Figure 1 As shown, the position adjustment module 300 further includes a write-back submodule 340 , which is configured to write the adjusted position into the demodulation module 400 .

[0095] The write-back submodule 340 is provided with an independent data interface for data transmission with the demodulation module 400 .

[0096] When the demodulation module 400 receives the adjustment position, it extracts the peak data from the first sensor signal according to the adjustment position and performs phase decomposition. Since the phase data before and after the peak position changes will jump, in order to ensure the continuity of the data, in some embodiments of the present invention, such as Figure 1 As shown, the position adaptive adjustment system 10 for sensors in a fiber optic sensor network further includes a data compensation module 500;

[0097] The data compensation module 500 is used to obtain original demodulated data obtained by demodulating the first sensor signal based on the original position, determine compensation data based on the original demodulated data and the demodulated data, and compensate the sensor data collected by the sensor based on the compensation data.

[0098] The embodiment of the present invention determines compensation data based on original demodulated data and demodulated data, and compensates sensor data collected by the sensor based on the compensation data, thereby avoiding jumps in sensor data and ensuring continuity of sensor data.

[0099] In a specific embodiment of the present invention, Figure 5 As shown, the data compensation module 500 includes a compensation data determination submodule 510 and a compensation submodule 520;

[0100] The compensation data determination submodule 510 is used to obtain original demodulated data obtained by demodulating the first channel of sensor signals based on the original position, and use the difference between the original demodulated data and the demodulated data as compensation data;

[0101] The compensation submodule 520 is used to obtain sensor data collected by the sensor and use the sum of the sensor data and the compensation data as output data.

[0102] In order to verify the effectiveness of the sensor position adaptive adjustment system 10 in the optical fiber sensor network proposed by the present invention, an experiment was conducted. Figure 6 is the vibration phase of the fiber optic sensing network running continuously for 24 hours, Figure 6 It can be seen that the grating sensor network did not experience signal loss or signal jump during operation, and the quality of the sensor signal was relatively good.

[0103] In a specific embodiment of the present invention, Figure 7As shown, the first signal acquisition module 100 includes a signal conditioning submodule 110, a voltage conversion submodule 120 and an analog-to-digital conversion submodule 130;

[0104] The signal conditioning submodule 110 is used to filter the collected first channel initial sensor signal to obtain a filtered signal, where the first channel initial sensor signal is an analog signal;

[0105] The voltage conversion submodule 120 is used to perform voltage conversion on the filtered signal to obtain a conversion signal;

[0106] The analog-to-digital conversion submodule 130 is used to perform analog-to-digital conversion on the conversion signal to obtain a first channel of sensing signals, where the first channel of sensing signals is a digital signal.

[0107] In a specific embodiment of the present invention, the filtering process may be specifically IIR filtering.

[0108] It should be noted that when the first signal acquisition module 100 includes multiple channels, each channel includes the above structure. Similarly, the structure of the second signal acquisition module 200 is consistent with that of the first signal acquisition module 100 and will not be described in detail here.

[0109] Correspondingly, an embodiment of the present invention further provides a method for adaptively adjusting the position of a sensor in a fiber optic sensor network, which is applicable to the adaptively adjusting the position of a sensor in a fiber optic sensor network in any of the above embodiments, such as Figure 8 As shown, the method for adaptively adjusting the position of sensors in a fiber optic sensor network includes:

[0110] S801, collecting at least one first sensing signal of the optical fiber sensing network;

[0111] S802, collecting a second sensing signal of the optical fiber sensing network;

[0112] S803. Determine the real-time positions of multiple sensors in the optical fiber sensing network based on the second sensing signal, and determine whether the positions of the multiple sensors are offset based on the stored original positions and real-time positions. When the positions of the multiple sensors are offset, adjust the original positions based on the real-time positions to obtain adjusted positions; the adjusted positions are used to demodulate the first sensing signal.

[0113] It should be noted that the method for adaptively adjusting the position of sensors in a fiber optic sensing network provided in the above embodiment can implement the technical solution described in the embodiment of the device for adaptively adjusting the position of sensors in the above fiber optic sensing network. The principles or specific implementation details of the above steps can be found in the corresponding contents of the embodiment of the device for adaptively adjusting the position of sensors in the above fiber optic sensing network, and will not be described one by one here.

[0114] The above is a detailed introduction to the system and method for adaptively adjusting the position of sensors in a fiber optic sensing network provided by the present invention. Specific examples are used herein to illustrate the principles and implementation methods of the present invention. The description of the above embodiments is only used to help understand the method of the present invention and its core idea. At the same time, for those skilled in the art, based on the ideas of the present invention, there will be changes in the specific implementation methods and application scope. In summary, the content of this specification should not be understood as limiting the present invention.

Claims

1. A system for adaptively adjusting the position of sensors in a fiber optic sensor network, characterized in that: include: A first signal acquisition module, configured to acquire at least one first sensing signal of the optical fiber sensing network; A second signal acquisition module is used to acquire a second channel of sensing signals from the optical fiber sensing network; The number and positions of sensors corresponding to the first sensor signal and the second sensor signal are the same; a position adjustment module, configured to determine the real-time positions of a plurality of sensors in the optical fiber sensor network based on the second sensing signal, and determine whether the positions of the plurality of sensors are offset based on stored original positions and the real-time positions; if the positions of the plurality of sensors are offset, adjust the original positions based on the real-time positions to obtain adjusted positions; the adjusted positions are used to demodulate the first sensing signal; The position adjustment module includes a position determination submodule, a position offset detection submodule and a position adjustment submodule; The position determination submodule is used to extract multiple peaks of the second sensor signal and use the positions of the multiple peaks as the real-time positions of the multiple sensors; The position offset detection submodule is used to determine whether the multiple sensors are offset and the number of sensors that are offset based on the original position and the real-time position; The position adjustment submodule is used to determine the ratio of the number of sensors that have shifted to the total number of the multiple sensors, and when the ratio is greater than a preset ratio, adjust the original position based on the real-time position to obtain the adjusted position.

2. The sensor position adaptive adjustment system in a fiber optic sensor network according to claim 1, characterized in that: The position adjustment submodule includes an adjustment judgment unit and an adjustment unit; The adjustment judgment unit is used to determine a ratio of the number of sensors that have shifted to the total number of the multiple sensors, and judge whether the ratio is greater than a preset ratio. If so, the original position needs to be adjusted; if not, the original position does not need to be adjusted; The adjustment unit is used to align the real-time position with the original position and replace the original position with the real-time position.

3. The sensor position adaptive adjustment system in a fiber optic sensor network according to claim 2, characterized in that: The adjustment unit includes a position alignment subunit and a position substitution subunit; The alignment subunit is configured to adjust the real-time position based on the second number of positions when the first number of positions of the real-time position is not equal to the second number of positions of the original position, so as to obtain an updated real-time position; the third number of positions of the updated real-time position is equal to the second number of positions; The position replacement subunit is configured to obtain a real-time sampling point sequence number of the updated real-time position and an original sampling point sequence number of the original position, and replace the original position with the updated real-time position when a sequence number difference between the real-time sampling point sequence number and the original sampling point sequence number is less than a preset difference.

4. The sensor position adaptive adjustment system in a fiber optic sensor network according to claim 3, characterized in that: The alignment subunit includes a position number judgment subunit, a first alignment subunit and a second alignment subunit; The position number judging subunit judges whether the first position number is greater than the second position number when the first position number of the real-time position is not equal to the second position number of the original position; The first alignment subunit is configured to, when the number of the first positions is greater than the number of the second positions, determine at least two real-time positions corresponding to the original positions, and delete a real-time position having a signal peak value of the at least two real-time positions that has a large difference from a signal peak value of the original positions; The second alignment subunit is configured to determine a missing position in the real-time position and a target original position corresponding to the missing position in the original position when the number of the first positions is less than the number of the second positions, and add the target original position to the missing position.

5. The sensor position adaptive adjustment system in a fiber optic sensor network according to claim 1, characterized in that: The system further includes a demodulation module, and the position adjustment module further includes a write-back submodule, wherein the write-back submodule is configured to write the adjusted position into the demodulation module; The demodulation module is used to demodulate the first sensing signal based on the adjustment position to obtain first demodulated data.

6. The sensor position adaptive adjustment system in a fiber optic sensor network according to claim 5, characterized in that: The system also includes a data compensation module; The data compensation module is used to obtain original demodulated data obtained by demodulating the first sensor signal based on the original position, determine compensation data based on the original demodulated data and the first demodulated data, and compensate the sensor data collected by the sensor based on the compensation data.

7. The system for adaptively adjusting the position of sensors in a fiber optic sensor network according to claim 6, characterized in that: The data compensation module includes a compensation data determination submodule and a compensation submodule; The compensation data determination submodule is used to obtain original demodulated data obtained by demodulating the first sensor signal based on the original position, and use the difference between the original demodulated data and the first demodulated data as the compensation data; The compensation submodule is used to obtain sensor data collected by the sensor, and use the sum of the sensor data and the compensation data as output data.

8. The system for adaptively adjusting the position of sensors in a fiber optic sensor network according to claim 1, wherein: The first signal acquisition module includes a signal conditioning submodule, a voltage conversion submodule and an analog-to-digital conversion submodule; The signal conditioning submodule is used to filter the collected first channel initial sensor signal to obtain a filtered signal, where the first channel initial sensor signal is an analog signal; The voltage conversion submodule is used to perform voltage conversion on the filtered signal to obtain a conversion signal; The analog-to-digital conversion submodule is used to perform analog-to-digital conversion on the conversion signal to obtain the first-path sensing signal, which is a digital signal.

9. A method for adaptively adjusting the position of a sensor in a fiber optic sensor network, characterized in that: The method for adaptively adjusting the position of a sensor in a fiber optic sensor network according to any one of claims 1 to 8 comprises: collecting at least one first sensing signal of the optical fiber sensing network; Collecting the second sensing signal of the optical fiber sensing network; Based on the second sensing signal, the real-time positions of multiple sensors in the optical fiber sensing network are determined, and based on the stored original positions and the real-time positions, whether the positions of the multiple sensors are offset is determined; when the positions of the multiple sensors are offset, the original positions are adjusted based on the real-time positions to obtain adjusted positions; the adjusted positions are used to demodulate the first sensing signal.

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