Vibration position detection device and method based on optical fiber sensing characteristics

Abstract

The invention provides a vibration position detection device and method based on optical fiber sensing characteristics, and the device comprises the steps: inputting an optical signal transmitted by an optical signal transmitter into an optical signal receiver through a first optical fiber section through an optical path composed of the optical signal transmitter, a first optical fiber section and the optical signal receiver; the optical signal receiver sends the optical signal into the photoelectric conversion module, the photoelectric conversion module converts the optical signal into an electric signal, the processor analyzes and processes the electric signal to obtain a first position of a target vibration point relative to an optical signal receiving point, and the first position of the target vibration point relative to the optical signal receiving point is obtained through a phase difference between signals of adjacent periods in the optical fiber; the distance between the external medium vibration point and the optical signal receiving point can be obtained, and then the relative position of the external medium vibration point relative to the optical signal receiving point can be obtained, so that the relatively accurate vibration position can be obtained, and the accuracy of vibration position detection is improved to a certain extent.

Description

Technical Field

[0001] The present application relates to the technical field of signal processing, and in particular to a vibration position detection device and method based on optical fiber sensing characteristics. Background Art

[0002] As a natural disaster, an earthquake can cause huge casualties and property losses. Monitoring earthquakes can issue early disaster warnings, enabling people in earthquake-stricken areas to have sufficient time to evacuate, and reducing casualties and property losses caused by earthquake disasters. Therefore, establishing an efficient earthquake monitoring and warning system is crucial for reducing the impact of disasters.

[0003] In related technologies, some monitoring instruments such as water level gauges, seismographs, electromagnetic wave measuring instruments, etc. can be used to monitor the epicenter of an earthquake through precursor anomalies of earthquakes (such as seismology, crustal deformation, gravity and geomagnetism, geoelectricity, hydrogeochemistry, dynamics of underground fluids (water, steam, gas, oil), stress and strain, meteorological anomalies, and macroscopic precursor phenomena), and issue warnings when earthquake activities are detected.

[0004] However, in the above methods, the precursor anomaly phenomena of earthquakes often cover a wide range, making it difficult to accurately locate the epicenter of an earthquake, resulting in poor accuracy in detecting the epicenter of an earthquake by the above methods. Summary of the Invention

[0005] In view of the above problems, embodiments of the present application provide a vibration position detection device, method, electronic device, and readable storage medium based on optical fiber sensing characteristics to overcome or at least partially solve the above problems.

[0006] In a first aspect, an embodiment of the present application provides a vibration position detection device based on optical fiber sensing characteristics, the device includes:

[0007] An optical signal transmitter, a first optical fiber segment, an optical signal receiver, a photoelectric conversion module, and a processor;

[0008] The optical signal transmitter is connected to the first end of the first optical fiber segment for inputting an optical signal into the first optical fiber segment from the first end;

[0009] The optical signal receiver is connected to the second end of the first optical fiber segment for receiving the optical signal in the first optical fiber segment;

[0010] The photoelectric conversion module is connected to the optical signal receiver for converting the optical signal into an electrical signal;

[0011] The processor is connected to the optoelectronic conversion module and is configured to determine the first phase information of the first period segment of the optical signal in the first optical fiber segment and the second phase information of the second period segment, wherein the first period segment and the second period segment are adjacent;

[0012] The processor is further configured to determine a first phase difference between the first phase information and the second phase information;

[0013] The processor is further configured to, when the first phase difference is not zero, determine a first distance based on the first phase difference and the signal frequency of the optical signal;

[0014] The processor is further configured to determine a first position of the target vibration point relative to the second end of the first optical fiber segment based on the first distance and the installation position of the first optical fiber segment.

[0015] Optionally, the processor is specifically further configured to:

[0016] Determine a second phase difference between the first phase information and the second phase information;

[0017] Obtain the ambient temperature of the environment where the first optical fiber segment is located;

[0018] Determine a phase offset of the optical signal based on the ambient temperature;

[0019] Determine a first phase difference between the first phase information and the second phase information based on the second phase difference and the phase offset.

[0020] Optionally, the first optical fiber segment includes:

[0021] A beam splitter, a reference optical path fiber segment, a Faraday rotator, and a detection optical path fiber segment;

[0022] The input end of the beam splitter is connected to the optical signal transmitter and is configured to divide the optical signal into a first sub-signal and a second sub-signal;

[0023] The third end of the reference optical path fiber segment is connected to the first output end of the beam splitter, the fourth end of the reference optical path fiber segment is connected to the input end of the Faraday rotator, and the output end of the Faraday rotator is connected to the first input end of the optical signal receiver for transmitting the first sub-signal;

[0024] The fifth end of the detection optical path fiber segment is connected to the second output end of the beam splitter, and the sixth end of the detection optical path fiber segment is connected to the second input end of the optical signal receiver for transmitting the second sub-signal.

[0025] Optionally, the first optical fiber segment is arranged in a bent manner in the target detection area, and there is no overlap in the first optical fiber segment.

[0026] Optionally, the first optical fiber segment is arranged in a grid pattern in the target detection area.

[0027] Optionally, the photoelectric conversion module is powered by an adjustable regulated power supply.

[0028] Optionally, the photoelectric conversion module includes:

[0029] A power supply sub-module, a signal processing sub-module, and a temperature control sub-module;

[0030] The power supply sub-module is connected to the adjustable regulated power supply and is used to supply power to the signal processing sub-module and the temperature control sub-module;

[0031] The signal processing sub-module is used to convert the optical signal into an electrical signal;

[0032] The temperature control sub-module is used to control the operating temperatures of the power supply sub-module and the signal processing sub-module.

[0033] In a second aspect, an embodiment of the present application provides a vibration position detection method based on the optical fiber sensing characteristic. The method includes:

[0034] Determine the first phase information of the first period segment of the optical signal in the first optical fiber segment and the second phase information of the second period segment; wherein, the first period segment and the second period segment are adjacent;

[0035] Determine the first phase difference between the first phase information and the second phase information;

[0036] In the case where the first phase difference is not 0, determine a first distance based on the first phase difference and the signal frequency of the optical signal;

[0037] Based on the first distance and the installation position of the first optical fiber segment, determine the first position of the target vibration point relative to the second end of the first optical fiber segment.

[0038] Optionally, the determining the first phase difference between the first phase information and the second phase information includes:

[0039] Determine the second phase difference between the first phase information and the second phase information;

[0040] Obtain the ambient temperature of the environment where the first optical fiber segment is located;

[0041] Based on the ambient temperature, determine the phase offset of the optical signal;

[0042] Based on the second phase difference and the phase offset, determine a first phase difference between the first phase information and the second phase information.

[0043] In a third aspect, an embodiment of the present application provides an electronic device, including a memory, a processor, and a computer program stored on the memory, where the processor executes the computer program to implement the vibration position detection method based on fiber optic sensing characteristics as described in any one of the above.

[0044] In a fourth aspect, an embodiment of the present application provides a readable storage medium, where a program or an instruction is stored on the readable storage medium, and when the program or the instruction is executed by a processor, the vibration position detection method based on fiber optic sensing characteristics as described in any one of the above is implemented.

[0045] Specific beneficial effects are as follows:

[0046] In the embodiment of the present application, through the optical path composed of an optical signal transmitter, a first optical fiber segment, and an optical signal receiver, the optical signal emitted by the optical signal transmitter can be input into the optical signal receiver through the first optical fiber segment. The optical signal receiver then sends the optical signal into the photoelectric conversion module, and the photoelectric conversion module converts the optical signal into an electrical signal. Then, the processor can analyze and process the electrical signal to obtain a first position of the target vibration point relative to the optical signal receiving point. Since the phase difference of the optical signal in the optical fiber is caused by the vibration of the external medium of the optical fiber, therefore, through the phase difference between adjacent cycle signals in the optical fiber, the distance between the external medium vibration point and the optical signal receiving point can be obtained, and further the relative position of the external medium vibration point relative to the optical signal receiving point can be obtained, so that a relatively accurate vibration position can be obtained, and the accuracy of vibration position detection is improved to a certain extent. Description of the Drawings

[0047] In order to more clearly illustrate the technical solutions of the embodiments of the present application, the following will briefly introduce the drawings required for the description of the embodiments of the present application. Obviously, the drawings in the following description are only some embodiments of the present application. For those of ordinary skill in the art, without creative efforts, other drawings can also be obtained based on these drawings.

[0048] Figure 1 is a schematic structural diagram of a vibration position detection device based on fiber optic sensing characteristics provided by an embodiment of the present application;

[0049] Figure 2 is a schematic flowchart of another vibration position detection method based on fiber optic sensing characteristics provided by an embodiment of the present application;

[0050] Figure 3 is a schematic diagram of an electronic device provided by an embodiment of the present application. Detailed implementation manners

[0051] The exemplary embodiments of the present application will be described in more detail below with reference to the accompanying drawings in the embodiments of the present application. Although the exemplary embodiments of the present application are shown in the drawings, it should be understood that the present application can be implemented in various forms and should not be limited by the embodiments set forth herein. On the contrary, these embodiments are provided so that the present application can be more thoroughly understood and the scope of the present application can be completely conveyed to those skilled in the art.

[0052] Refer to Figure 1 , Figure 1 which is a schematic structural diagram of a vibration position detection device based on the optical fiber sensing characteristics provided by an embodiment of the present application. The device may include:

[0053] An optical signal transmitter, a first optical fiber segment, an optical signal receiver, a photoelectric conversion module, and a processor.

[0054] The optical signal transmitter is connected to the first end of the first optical fiber segment and is used to input an optical signal into the first optical fiber segment from the first end;

[0055] The optical signal receiver is connected to the second end of the first optical fiber segment and is used to receive the optical signal in the first optical fiber segment;

[0056] The photoelectric conversion module is connected to the optical signal receiver and is used to convert the optical signal into an electrical signal;

[0057] The processor is connected to the photoelectric conversion module and is used to determine the first phase information of the first period segment and the second phase information of the second period segment of the optical signal in the first optical fiber segment; wherein, the first period segment and the second period segment are adjacent;

[0058] The processor is further used to determine the first phase difference between the first phase information and the second phase information;

[0059] The processor is further used to determine a first distance based on the first phase difference and the signal frequency of the optical signal when the first phase difference is not 0;

[0060] The processor is further used to determine a first position of the target vibration point relative to the second end of the first optical fiber segment based on the first distance and the installation position of the first optical fiber segment.

[0061] In the embodiment of the present application, the optical signal transmitter can be connected to the first end of the first optical fiber segment. The optical signal transmitter can be a light source such as a laser that can emit stable and single light. The optical signal transmitter can be used to input an optical signal into the first optical fiber segment from the first end.

[0062] In an embodiment of the present application, the optical signal receiver may be an optical fiber transceiver, an optical modem, or an independent optical receiver. In the first optical fiber segment, the optical signal may propagate from the first end of the first optical fiber segment to the second end. The optical signal receiver may be connected to the second end of the first optical fiber segment, so as to be used for receiving the optical signal in the first optical fiber segment.

[0063] In an embodiment of the present application, the optoelectronic conversion module may be an optical receiver, a photodiode, or an optoelectronic converter. The optoelectronic conversion module may be connected to the optical signal receiver and receive the optical signal in the optical signal receiver, so as to be used for converting the optical signal into an electrical signal. Then, the optoelectronic conversion module may send the electrical signal into the processor.

[0064] In an embodiment of the present application, the processor may be some hardware with data processing capabilities, such as a central processing unit (CPU), a field programmable gate array (FPGA), and a complex programmable logic device (CPLD), etc. The processor may be connected to the optoelectronic conversion module. The processor may determine the first phase information of the first cycle segment and the second phase information of the second cycle segment of the optical signal in the first optical fiber segment according to the electrical signal received from the optoelectronic conversion module; wherein, the first cycle segment and the second cycle segment may be adjacent. When performing signal acquisition, the frequency of the acquired signal and the frequency of the source signal should at least satisfy the Nyquist law. In practice, we may make the frequency of the acquired signal much greater than the frequency of the source signal, so that the acquired data is as close as possible to the real data.

[0065] In an embodiment of the present application, the processor may also be used for determining the first phase difference between the first phase information and the second phase information. Under normal circumstances, the phases of the signal wavebands of two consecutive cycles may be the same. If a vibration occurs at a certain position of the first optical fiber segment, it will cause attenuation of the optical signal, resulting in a change in the phase information of the optical signal. Then, there will be a deviation in the phases of the signal wavebands of two adjacent cycles before and after the change, generating the first phase difference. The first phase difference may take the absolute value, or be calculated by subtracting the phase included in the first phase information from the phase included in the second phase information.

[0066] In an embodiment of the present application, the processor may also be used for, when the first phase difference is not 0, calculating and determining the first distance between the signal anomaly point and the optical signal receiving point corresponding to the first optical fiber segment based on the first phase difference and the signal frequency of the optical signal. The calculation method of the first distance may be as shown in Equation 1 below:

[0067] d = ΔΦ / (2πf) (Equation 1)

[0068] In Equation 1 above, d represents the first distance between the signal anomaly point and the optical signal receiving point corresponding to the first optical fiber segment. ΔΦ represents the first phase difference, and f represents the frequency of the optical signal. Among them, the signal anomaly point is the vibration source point where vibration occurs, and the optical signal receiving point can be the point where the optical signal receiver contacts the first optical fiber segment, that is, the second end of the first optical fiber segment.

[0069] In an embodiment of the present application, the processor can also be used to determine the first position of the target vibration point relative to the second end of the first optical fiber segment based on the first distance and the installation position of the first optical fiber segment. The first distance can represent the distance between the target vibration point where vibration occurs and the optical signal receiving point. Therefore, according to the first distance and the installation position of the first optical fiber segment, the first position of the target vibration point relative to the second end of the first optical fiber segment can be determined.

[0070] In an embodiment of the present application, through the optical path composed of an optical signal transmitter, a first optical fiber segment, and an optical signal receiver, the optical signal emitted by the optical signal transmitter can be input into the optical signal receiver through the first optical fiber segment. The optical signal receiver then sends the optical signal into the photoelectric conversion module, and the photoelectric conversion module converts the optical signal into an electrical signal. Then, the processor can analyze and process the electrical signal to obtain the first position of the target vibration point relative to the optical signal receiving point. Since the phase difference of the optical signal in the optical fiber is caused by the vibration of the external medium of the optical fiber, the distance between the external medium vibration point and the optical signal receiving point can be obtained through the phase difference between adjacent cycle signals in the optical fiber, and then the relative position of the external medium vibration point relative to the optical signal receiving point can be obtained, thereby obtaining a relatively accurate vibration position, which improves the accuracy of vibration position detection to a certain extent.

[0071] On the basis of the above embodiments, optionally, a vibration position detection device based on the optical fiber sensing characteristic provided by an embodiment of the present application may further include:

[0072] The processor is specifically further used for:

[0073] Determine the second phase difference between the first phase information and the second phase information, obtain the environmental temperature of the environment where the first optical fiber segment is located, determine the phase offset of the optical signal based on the environmental temperature, and determine the first phase difference between the first phase information and the second phase information based on the second phase difference and the phase offset.

[0074] In the embodiments of the present application, considering that the optical fiber has different propagation characteristics at different operating temperatures, the phase offset caused by temperature can be considered when calculating the first phase difference. First, the first phase information and the second phase information can be subtracted to calculate the second phase difference. Then, the ambient temperature of the first optical fiber segment can be determined, and the phase offset of the optical signal can be calculated based on the ambient temperature. Finally, the second phase difference is corrected using the phase offset to obtain the first phase difference between the first phase information and the second phase information. The calculation method of the first phase difference is shown in Equation 2 below:

[0075] ΔΦ 1 =ΔΦ 2 -Δσ (Equation 2)

[0076] In Equation 2 above, ΔΦ 1 represents the first phase difference, ΔΦ 2 represents the second phase difference, and Δσ represents the phase offset. The above parameters can all be greater than or equal to 0. Among them, the calculation method of the phase offset Δσ is shown in Equation 3 below:

[0077] Δσ = αΔT (Equation 3)

[0078] In Equation 3 above, Δσ represents the phase offset, α represents the thermal expansion coefficient of the optical fiber, and ΔT represents the temperature difference between the ambient temperature and the standard normal temperature (25°C). Using the phase offset to correct the second phase difference to obtain the first phase difference can improve the accuracy of the first phase difference to a certain extent and improve the accuracy of the final vibration position detection.

[0079] Based on the above embodiments, optionally, the first optical fiber segment may include:

[0080] a beam splitter, a reference optical path fiber segment, a Faraday rotator, and a detection optical path fiber segment;

[0081] The input end of the beam splitter is connected to the optical signal transmitter and is used to divide the optical signal into a first sub-signal and a second sub-signal;

[0082] The third end of the reference optical path fiber segment is connected to the first output end of the beam splitter, the fourth end of the reference optical path fiber segment is connected to the input end of the Faraday rotator, and the output end of the Faraday rotator is connected to the first input end of the optical signal receiver for transmitting the first sub-signal;

[0083] The fifth end of the detection optical path fiber segment is connected to the second output end of the beam splitter, and the sixth end of the detection optical path fiber segment is connected to the second input end of the optical signal receiver for transmitting the second sub-signal.

[0084] In an embodiment of the present application, the first optical fiber segment may include a beam splitter, a reference optical path fiber segment, a Faraday rotator mirror, and a detection optical path fiber segment. Among them, the input end of the beam splitter is connected to the optical signal transmitter. The beam splitter can split the optical signal (generally a single light) emitted by the optical signal transmitter into two beams, namely a first sub-signal and a second sub-signal. The beam splitter can be installed between the optical signal transmitter and the first end of the first optical fiber segment. In this way, the two output ends of the beam splitter are connected to the first end of the first optical fiber segment. The third end of the reference optical path fiber segment can be connected to the first output end of the beam splitter, the fourth end of the reference optical path fiber segment can be connected to the input end of the Faraday rotator mirror, and the output end of the Faraday rotator mirror can be connected to the first input end of the optical signal receiver, which can be used to transmit the first sub-signal. The fifth end of the detection optical path fiber segment can be connected to the second output end of the beam splitter, and the sixth end of the detection optical path fiber segment can be connected to the second input end of the optical signal receiver, which can be used to transmit the second sub-signal. Among them, the third end and the fifth end together constitute the first end of the first optical fiber segment, and the output end of the Faraday rotator mirror and the sixth end together constitute the second end of the first optical fiber segment. Among them, the optical signal output by the reference optical path fiber segment can be used as a reference signal (or calibration signal) for the optical signal output by the detection optical path fiber segment. In this way, it can eliminate the abnormal phase of the optical signal caused by the bending of the optical fiber itself to a certain extent, and improve the stability and reliability of the optical signal.

[0085] On the basis of the above implementation manner, optionally, the first optical fiber segment is arranged in a bent manner in the target detection area, and there is no overlap in the first optical fiber segment.

[0086] In an embodiment of the present application, the first optical fiber segment can be arranged in a bent manner in the target detection area, and each position does not overlap. In this way, the first optical fiber segment can have more precise detection accuracy at different positions in the same area, and can detect more subtle vibrations.

[0087] Optionally, the first optical fiber segment is arranged in a grid pattern in the target detection area.

[0088] In an embodiment of the present application, in the target detection area, the first optical fiber segment can also be arranged in a grid pattern. The sizes of each grid can be the same or different. In this way, the first optical fiber segment can also have more precise detection accuracy at different positions in the same area, and can detect more subtle vibrations.

[0089] On the basis of the above implementation manner, optionally, the photoelectric conversion module is powered by an adjustable regulated power supply.

[0090] In an embodiment of the present application, the optoelectronic conversion module can be powered by an adjustable regulated power supply. Compared with traditional power supplies, using an adjustable regulated power supply can make the signal characteristics of the electrical signals output by the optoelectronic conversion module more consistent with those of the abnormal optical signals, thereby improving the accuracy of vibration position detection.

[0091] Based on the above embodiment, optionally, the optoelectronic conversion module includes:

[0092] A power supply sub-module, a signal processing sub-module, and a temperature control sub-module;

[0093] The power supply sub-module is connected to the adjustable regulated power supply and is used to supply power to the signal processing sub-module and the temperature control sub-module;

[0094] The signal processing sub-module is used to convert the optical signal into an electrical signal;

[0095] The temperature control sub-module is used to control the operating temperatures of the power supply sub-module and the signal processing sub-module.

[0096] In an embodiment of the present application, the optoelectronic conversion module can be composed of a power supply sub-module, a signal processing sub-module, and a temperature control sub-module. Among them, the power supply sub-module can be a voltage regulator or a transformer, etc. The power supply sub-module can be connected to the adjustable regulated power supply and is used to input the current or voltage signal of the adjustable regulated power supply into the signal processing sub-module and the temperature control sub-module, and at the same time remove the ripple of the current signal or voltage signal output by the adjustable regulated power supply to supply power to the signal processing sub-module and the temperature control sub-module. The signal processing sub-module can be an optical receiver or a photodiode, and the signal processing sub-module can be used to convert the optical signal into an electrical signal. The temperature control sub-module can be used to control the operating temperatures of the power supply sub-module and the signal processing sub-module to prevent the operating temperatures of the power supply sub-module and the signal processing sub-module from being too high. Through the above device, more signal abnormal characteristics can be retained when the optical signal is converted into an electrical signal, improving the accuracy of the final vibration position detection.

[0097] Refer to Figure 2 , Figure 2 which is a schematic flow chart of a vibration position detection method based on fiber optic sensing characteristics provided by an embodiment of the present application. The method may include:

[0098] Step 201, determining first phase information of a first period segment and second phase information of a second period segment of an optical signal in a first optical fiber segment; wherein, the first period segment and the second period segment are adjacent.

[0099] In an embodiment of the present application, since the period and phase information of the optical signal are transmitted to the electrical signal when the optical signal is converted into an electrical signal, the processor can determine the first phase information of the first period segment of the optical signal in the first optical fiber segment and the second phase information of the second period segment according to the received electrical signal.

[0100] Step 202: Determine a first phase difference between the first phase information and the second phase information.

[0101] In an embodiment of the present application, the second phase information may be subtracted from the first phase information, and the obtained difference may be used as the first phase difference. The first phase difference may also be the absolute value of the above difference.

[0102] Optionally, step 202 may include the following sub-steps:

[0103] Sub-step 2021: Determine a second phase difference between the first phase information and the second phase information.

[0104] In an embodiment of the present application, the second phase information may be subtracted from the first phase information, and the obtained difference may be used as the second phase difference. The second phase difference may also be the absolute value of the above difference.

[0105] Sub-step 2022: Obtain the ambient temperature of the environment where the first optical fiber segment is located.

[0106] In an embodiment of the present application, a temperature measurement device such as a temperature sensor may be used to obtain the ambient temperature of the environment where the first optical fiber segment is located.

[0107] Sub-step 2023: Determine the phase offset of the optical signal based on the ambient temperature.

[0108] In an embodiment of the present application, considering that the phase of the signal will shift with the increase in temperature, the phase offset of the optical signal can be calculated according to the ambient temperature. The calculation method is as shown in Equation 3 in the above embodiment and will not be elaborated here.

[0109] Sub-step 2024: Determine the first phase difference between the first phase information and the second phase information based on the second phase difference and the phase offset.

[0110] In an embodiment of the present application, the first phase difference between the first phase information and the second phase information can be calculated according to the second phase difference and the phase offset. The calculation method is as shown in Equation 2 in the above embodiment and will not be elaborated here.

[0111] In an embodiment of the present application, by determining a second phase difference between the first phase information and the second phase information, the environmental temperature of the environment where the first optical fiber segment is located is obtained. Based on the environmental temperature, the phase offset of the optical signal is determined. Based on the second phase difference and the phase offset, the first phase difference between the first phase information and the second phase information is determined. The second phase difference between the first phase information and the second phase information can be corrected by the phase offset caused by temperature to obtain the first phase difference, which can improve the accuracy of the first phase difference to a certain extent.

[0112] Step 203, in the case where the first phase difference is not 0, based on the first phase difference and the signal frequency of the optical signal, determine a first distance.

[0113] In an embodiment of the present application, if the first phase difference is not 0, it indicates that vibration occurs near the first optical fiber segment. At this time, the first distance can be calculated according to the first phase difference and the signal frequency of the optical signal. The first distance can represent the distance between the position where vibration occurs in the first optical fiber segment and the second end of the first optical fiber segment (i.e., the contact end of the first optical fiber segment and the optical signal receiver). The calculation method of the first distance is as shown in Equation 1 in the above embodiment, which will not be elaborated here.

[0114] Step 204, based on the first distance and the installation position of the first optical fiber segment, determine a first position of the target vibration point relative to the second end of the first optical fiber segment.

[0115] In an embodiment of the present application, the first position of the target vibration point relative to the second end of the first optical fiber segment can be determined according to the first distance and the installation position of the first optical fiber segment. Among them, the first distance can be used as the distance information in the first position, and the installation position of the first optical fiber segment can be used as the direction information in the first position.

[0116] In an embodiment of the present application, by determining the first phase information of the first period segment of the optical signal in the first optical fiber segment and the second phase information of the second period segment; wherein, the first period segment and the second period segment are adjacent, determining the first phase difference between the first phase information and the second phase information. In the case where the first phase difference is not 0, based on the first phase difference and the signal frequency of the optical signal, determine the first distance. Based on the first distance and the installation position of the first optical fiber segment, determine the first position of the target vibration point relative to the second end of the first optical fiber segment. The first position of the target vibration point relative to the second end of the first optical fiber segment can be determined according to the electrical signal converted from the optical signal, so that the specific orientation of the target vibration point can be judged, which improves the accuracy of vibration point detection to a certain extent.

[0117] The embodiments of the present application provide an electronic device. Refer to Figure 3, the electronic device 50 includes: a processor 501, a memory 502, and a computer program 5021 stored on the memory 502 and executable on the processor 501. When the processor 501 executes the program, it implements the vibration position detection method based on fiber optic sensing characteristics in the foregoing embodiments.

[0118] An embodiment of the present application also provides a computer-readable storage medium, on which a computer program / instructions are stored. When the computer program / instructions are executed by a processor, the steps in the vibration position detection method based on fiber optic sensing characteristics disclosed in the embodiments of the present application are implemented.

[0119] An embodiment of the present application also provides a computer program product. When the computer program product runs on an electronic device, it causes the processor to implement the steps in the vibration position detection method based on fiber optic sensing characteristics disclosed in the embodiments of the present application when executed.

[0120] Each embodiment in this specification is described in a progressive manner. The key point of each embodiment is to illustrate the differences from other embodiments. The same or similar parts among the embodiments can be referred to each other.

[0121] The embodiments of the present application are described with reference to the flowcharts and / or block diagrams of methods, devices, electronic devices, and computer program products according to the embodiments of the present application. It should be understood that each process and / or block in the flowchart and / or block diagram, as well as the combination of processes and / or blocks in the flowchart and / or block diagram, can be implemented by computer program instructions. These computer program instructions can be provided to the processor of a general-purpose computer, a special-purpose computer, an embedded processor, or other programmable data processing terminal devices to generate a machine, so that the instructions executed by the processor of the computer or other programmable data processing terminal devices generate a device for implementing the specified functions in Figure 1 one process or multiple processes and / or blocks Figure 1 one block or multiple blocks.

[0122] These computer program instructions can also be stored in a computer-readable memory that can direct a computer or other programmable data processing terminal device to work in a specific manner, so that the instructions stored in the computer-readable memory generate a manufactured article including an instruction device, and the instruction device implements the specified functions in Figure 1 one process or multiple processes and / or blocks Figure 1 one block or multiple blocks.

[0123] These computer program instructions can also be loaded onto a computer or other programmable data processing terminal device, so that a series of operation steps are executed on the computer or other programmable terminal device to generate a computer-implemented process, and thus the instructions executed on the computer or other programmable terminal device provide for implementing the process Figure 1 one process or multiple processes and / or blocks Figure 1 steps for the functions specified in one block or multiple blocks.

[0124] Although the preferred embodiments of the embodiments of the present application have been described, those skilled in the art can make additional changes and modifications once they learn the basic creative concept. Therefore, the appended claims are intended to be construed to include the preferred embodiments and all changes and modifications falling within the scope of the embodiments of the present application.

[0125] Finally, it should also be noted that in this article, relational terms such as first and second are only used to distinguish one entity or operation from another entity or operation, and do not necessarily require or imply any such actual relationship or order between these entities or operations. Moreover, the term "comprising", "including" or any other variant thereof is intended to cover non-exclusive inclusion, so that a process, method, article or terminal device comprising a series of elements includes not only those elements but also other elements not expressly listed, or elements inherent to such process, method, article or terminal device. Without further limitation, an element defined by the statement "comprising an..." does not exclude the presence of additional identical elements in the process, method, article or terminal device comprising the element.

[0126] The above has introduced in detail a vibration position detection device and method based on fiber optic sensing characteristics provided by the present application. Specific examples are used herein to elaborate on the principle and implementation manner of the present application. The description of the above embodiments is only used to help understand the method and its core idea of the present application; at the same time, for those of ordinary skill in the art, according to the idea of the present application, there will be changes in the specific implementation manner and application scope. In summary, the content of this specification should not be construed as a limitation to the present application.

Claims

1. A vibration position detection device based on optical fiber sensing characteristics, characterized in that: The device comprises: An optical signal transmitter, a first optical fiber segment, an optical signal receiver, a photoelectric conversion module, and a processor; The optical signal transmitter is connected to the first end of the first optical fiber segment and is used to input an optical signal from the first end to the first optical fiber segment; The optical signal receiver is connected to the second end of the first optical fiber segment and is used to receive the optical signal in the first optical fiber segment; The photoelectric conversion module is connected to the optical signal receiver and is used to convert the optical signal into an electrical signal; The processor is connected to the photoelectric conversion module, and is used to determine the first phase information of the first cycle segment of the optical signal in the first optical fiber segment, and the second phase information of the second cycle segment; wherein the first cycle segment and the second cycle segment are adjacent; The processor is further configured to determine a first phase difference between the first phase information and the second phase information; The processor is further configured to determine a first distance based on the first phase difference and a signal frequency of the optical signal when the first phase difference is not zero; The processor is further configured to determine a first position of a target vibration point relative to a second end of the first optical fiber segment based on the first distance and an installation position of the first optical fiber segment.

2. The device according to claim 1, characterized in that The processor is further configured to: determining a second phase difference between the first phase information and the second phase information; Acquire the ambient temperature of the environment where the first optical fiber segment is located; Based on the ambient temperature, determining a phase offset of the optical signal; Based on the second phase difference and the phase offset, a first phase difference between the first phase information and the second phase information is determined.

3. The device according to claim 1, characterized in that The first optical fiber segment comprises: Beam splitter, reference optical path fiber segment, Faraday rotation mirror, detection optical path fiber segment; The input end of the beam splitter is connected to the optical signal transmitter, and is used to split the optical signal into a first sub-signal and a second sub-signal; The third end of the reference optical path fiber segment is connected to the first output end of the beam splitter, the fourth end of the reference optical path fiber segment is connected to the input end of the Faraday rotation mirror, and the output end of the Faraday rotation mirror is connected to the first input end of the optical signal receiver for transmitting the first sub-signal; The fifth end of the detection light path fiber segment is connected to the second output end of the beam splitter, and the sixth end of the detection light path fiber segment is connected to the second input end of the optical signal receiver for transmitting the second sub-signal.

4. The device according to claim 1, characterized in that The first optical fiber segments are arranged in a curved manner in the target detection area, and the first optical fiber segments do not overlap.

5. The device according to claim 1, characterized in that The first optical fiber segments are arranged in a grid shape in the target detection area.

6. The device according to claim 1, characterized in that The photoelectric conversion module is powered by an adjustable voltage-stabilized power supply.

7. The device according to claim 6, characterized in that The photoelectric conversion module comprises: Power supply submodule, signal processing submodule, temperature control submodule; The power supply submodule is connected to the adjustable voltage-stabilized power supply and is used to supply power to the signal processing submodule and the temperature control submodule; The signal processing submodule is used to convert the optical signal into an electrical signal; The temperature control submodule is used to control the operating temperature of the power supply submodule and the signal processing submodule.

8. A vibration position detection method based on optical fiber sensing characteristics, characterized in that: The method comprises: Determine first phase information of a first cycle segment of an optical signal in a first optical fiber segment, and second phase information of a second cycle segment; wherein the first cycle segment and the second cycle segment are adjacent; determining a first phase difference between the first phase information and the second phase information; When the first phase difference is not zero, determining a first distance based on the first phase difference and a signal frequency of the optical signal; Based on the first distance and the installation position of the first optical fiber segment, a first position of a target vibration point relative to the second end of the first optical fiber segment is determined.

9. The method according to claim 8, characterized in that The determining a first phase difference between the first phase information and the second phase information comprises: determining a second phase difference between the first phase information and the second phase information; Acquire the ambient temperature of the environment where the first optical fiber segment is located; Based on the ambient temperature, determining a phase offset of the optical signal; Based on the second phase difference and the phase offset, a first phase difference between the first phase information and the second phase information is determined.

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