Signal compensation methods, devices, systems and electronic equipment for interferometric demodulators

Abstract

This invention relates to a signal compensation method, apparatus, system, and electronic device for an interferometric demodulator. The method includes: acquiring the original signal and the interference electrical signal corresponding to the interferometric demodulator, wherein the original signal is an electrical signal obtained by photoelectric conversion of the input signal of the interferometer, and the interference electrical signal is an electrical signal obtained by photoelectric conversion of the interference optical signal output by the interferometer. The integrity of the original signal is determined; if the original signal is determined to be incomplete, signal compensation is performed on the original signal based on the original signal and the interference electrical signal using a normalization method. The invention can detect the integrity of the original signal in the interferometric demodulator. When a missing original signal is detected, the fiber grating corresponding to the missing signal is inspected to troubleshoot and resolve fiber breakage issues. The embodiments of this invention also use a normalization method to compensate for incomplete original signals, preventing the degradation of the modulation signal due to missing original signals from affecting the accuracy of instrument measurements.

Description

Technical Field

[0001] This invention relates to the field of grating array sensing technology, and in particular to signal compensation methods, devices, systems and electronic equipment for interferometric demodulators. Background Technology

[0002] The working principle of an interferometric demodulator is as follows: light from a light source is first incident on an optical fiber with a grating after passing through a coupler with a certain bandpass. Light of wavelengths that meet the conditions is reflected, while light of wavelengths that do not meet the conditions is transmitted. The center wavelength of the reflected light changes with temperature or strain, and thus the change of the corresponding physical quantity of the target object can be determined by the change of the center wavelength of the reflected light.

[0003] To accurately determine the change in the target object, the reflected light needs to be interfered with. Then, the phase-change signal is demodulated from the interferometer's output light signal using PGC (phase carrier modulation) technology, thus obtaining the signal to be measured. The interferometer's output signal is converted into an electrical signal via photoelectric conversion, which can be expressed as: In the formula, A is the DC quantity, and B is the amplitude of the interference signal. It can be represented as: Among them, Dcosω s t is the amplitude of the signal to be measured. The phase change is caused by environmental noise. Analysis of the electrical signal formula after interference reveals that, ideally, the value of the interference signal would periodically change between AB and A+B. However, due to the variable of environmental noise, the signal value would fluctuate irregularly. Therefore, situations such as fiber breakage can lead to the loss of some of the original signal, degrading the demodulated signal and affecting the accuracy of instrument measurements. In such cases, the interference signal output by the interferometer alone cannot detect the problem. Summary of the Invention

[0004] In view of this, it is necessary to provide signal compensation methods, devices, systems and electronic equipment for interferometric demodulators to solve the problem of original signal loss in interferometric demodulators due to fiber breakage or environmental influences in practical applications.

[0005] To address the aforementioned problems, in a first aspect, the present invention provides a signal compensation method for an interferometric demodulator, comprising:

[0006] The original signal and the interference electrical signal corresponding to the interferometric demodulator are acquired, wherein the original signal is an electrical signal obtained by photoelectric conversion of the input signal of the interferometer, and the interference electrical signal is an electrical signal obtained by photoelectric conversion of the interference light signal output by the interferometer;

[0007] The integrity of the original signal is determined. If the original signal is determined to be incomplete, signal compensation is performed on the original signal based on the original signal and the interference electrical signal using a normalization method.

[0008] Preferably, determining the integrity of the original signal specifically includes:

[0009] The original signal data was grouped into 4-bit groups using PyCharm software. The resulting groups were then converted from hexadecimal to decimal. A function graph of the converted decimal values ​​was plotted, and the integrity of the original signal was determined based on the function graph.

[0010] Preferably, determining the integrity of the original signal further includes:

[0011] Determine the noise floor range of the original signal, and define the effective signal region and the invalid signal region in the original signal based on the noise floor range; determine whether the original signal data in the effective signal region is within the noise floor range, and if so, determine that the original signal is incomplete.

[0012] Preferably, the step of performing signal compensation on the original signal using a normalization method based on the original signal and the interference electrical signal specifically includes:

[0013] The interference electrical signal is peak-finding based on the centroid algorithm to obtain the first peak data, and the original signal is peak-finding based on the centroid algorithm to obtain the second peak data.

[0014] Based on the first peak data and the second peak data, calculate the normalization factor corresponding to each peak.

[0015] Based on the total amount of data in the original signal and the total number of gratings in the interferometric demodulator, the number of original signal data contained in each grating interval is calculated.

[0016] Multiply each original signal data by the normalization factor corresponding to its grating interval to obtain the signal compensation result of the original signal data.

[0017] Secondly, the present invention also provides a signal compensation device for an interferometric demodulator, comprising:

[0018] The acquisition module is used to acquire the original signal and the interference electrical signal corresponding to the interferometric demodulator. The original signal is an electrical signal obtained by photoelectric conversion of the input signal of the interferometer, and the interference electrical signal is an electrical signal obtained by photoelectric conversion of the interference light signal output by the interferometer.

[0019] The signal compensation module is used to determine the integrity of the original signal. If the original signal is determined to be incomplete, the original signal is compensated by a normalization method based on the original signal and the interference electrical signal.

[0020] Thirdly, the present invention also provides a signal compensation system for an interferometric demodulator, comprising a laser, a pulse modulation module, a sensor network, a photoelectric conversion module, an interferometer, a data acquisition and processing module, and a host computer; the laser is connected to one end of an optical circulator via the pulse modulation module, the other end of the optical circulator is connected to the sensor network, one end of the interferometer, and one end of the photoelectric conversion module, respectively; the other end of the interferometer is communicatively connected to the photoelectric conversion module, the other end of the photoelectric conversion module is connected to one end of the data acquisition and processing module, and the other end of the data acquisition and processing module is connected to the host computer; wherein...

[0021] The laser is used to emit a beam to the pulse modulation module;

[0022] The pulse modulation module is used to modulate the acquired light beam into a pulsed light signal and transmit it to the sensor network;

[0023] The optical circulator is used to transmit the amplified pulsed optical signal to the sensing network, and to transmit the reflected optical signal output by the sensing network to the photoelectric conversion module and the interferometer, respectively.

[0024] The sensing network is used to output a reflected light signal of a specific wavelength after the collected pulse light signal is reflected by the fiber optic grating array, and to transmit the reflected light signal to the photoelectric conversion module and the interferometer respectively through the optical circulator.

[0025] The interferometer is used to convert the collected reflected light signal into an interference light signal and output it to the photoelectric conversion module;

[0026] The photoelectric conversion module is used to convert the collected reflected light signal into an original signal and transmit it to the data acquisition and processing module, and to convert the collected interference light signal into an interference electrical signal and transmit it to the data acquisition and processing module.

[0027] The data acquisition and processing module is used to transmit the acquired raw signals and interference electrical signals to the host computer;

[0028] The host computer is used to determine the integrity of the acquired original signal. If the signal is determined to be incomplete, a normalization method is used to process the original signal and the interference electrical signal to perform signal compensation on the original signal.

[0029] Preferably, the signal compensation system of the interferometric demodulator further includes a signal amplification module, and the pulse modulation module is connected to the optical circulator through the signal amplification module;

[0030] The signal amplification module is used to amplify the power of the acquired pulsed light signal and transmit it to the optical circulator.

[0031] Preferably, the signal compensation system of the interferometric demodulator further includes a serial port transceiver module, and the data acquisition and processing module is connected to the host computer through the serial port transceiver module;

[0032] The serial transceiver module is used to send the received instructions from the host computer to the data acquisition and processing module, and to transmit the raw signals and interference electrical signals acquired by the data acquisition and processing module to the host computer.

[0033] Fourthly, the present invention also provides an electronic device, including a memory and a processor, wherein,

[0034] The memory is used to store programs;

[0035] The processor, coupled to the memory, is used to execute the program stored in the memory to implement the steps in the signal compensation system of an interferometric demodulator as described in any of the above implementations.

[0036] Fifthly, the present invention also provides a computer-readable storage medium for storing a computer-readable program or instructions, which, when executed by a processor, can implement the steps in the signal compensation system of an interferometric demodulator as described in any of the above implementations.

[0037] The beneficial effects of the above embodiments are as follows: The signal compensation method, apparatus, system, and electronic device for the interferometric demodulator provided in this invention acquire the original signal and interference electrical signal corresponding to the interferometric demodulator. The original signal is an electrical signal obtained by photoelectric conversion of the input signal of the interferometer, and the interference electrical signal is obtained by photoelectric conversion of the interference optical signal output by the interferometer. The integrity of the original signal is determined. If the original signal is determined to be incomplete, signal compensation is performed on the original signal based on the original signal and the interference electrical signal using a normalization method. This invention can detect the integrity of the original signal in the interferometric demodulator and compensate for incomplete original signals, preventing the degradation of the modulation signal due to missing original signals from affecting the accuracy of instrument measurements. Attached Figure Description

[0038] Figure 1 A flowchart illustrating a method of the signal compensation system for an interferometric demodulator provided by the present invention;

[0039] Figure 2(a) is a function graph of the interference electrical signal provided by the present invention;

[0040] Figure 2(b) is a function graph of the original signal provided by the present invention;

[0041] Figure 3 A schematic diagram of the original signal compensation result provided by the present invention;

[0042] Figure 4 This is a structural block diagram of an embodiment of the signal compensation device for an interferometric demodulator provided by the present invention;

[0043] Figure 5 A schematic diagram of the structure of a signal compensation system for an interferometric demodulator provided by the present invention;

[0044] Figure 6 A structural block diagram of an embodiment of the electronic device provided by the present invention. Detailed Implementation

[0045] Preferred embodiments of the present invention will now be described in detail with reference to the accompanying drawings, which form part of this application and are used together with the embodiments of the present invention to illustrate the principles of the present invention, but are not intended to limit the scope of the present invention.

[0046] To address the problem of missing original signals in interferometric demodulators due to fiber breaks or environmental factors in practical applications, this invention provides a signal compensation method for interferometric demodulators. This method can detect the integrity of the original signal in the interferometric demodulator and compensate for incomplete original signals, preventing the degradation of the modulation signal due to missing original signals from affecting the accuracy of instrument measurements. Several embodiments will be described and illustrated below.

[0047] Figure 1 This is a flowchart illustrating an embodiment of the signal compensation method for an interferometric demodulator provided by the present invention. Figure 1 As shown, the signal compensation methods for interferometric demodulators include:

[0048] Step 110: Obtain the original signal and interference electrical signal corresponding to the interferometric demodulator. The original signal is an electrical signal obtained by photoelectric conversion of the input signal of the interferometer, and the interference electrical signal is an electrical signal obtained by photoelectric conversion of the interference light signal output by the interferometer.

[0049] Specifically, the working principle of an interferometric demodulator is as follows: light from the light source is first incident into a fiber optic grating array after passing through a coupler with a certain bandpass. The light of wavelengths that meet the conditions is reflected by the fiber optic grating array into the interferometer. The interferometer interferes with the reflected light, and then the phase-changing signal is demodulated from the optical signal output by the interferometer using PGC (phase carrier) technology, thereby obtaining the signal to be measured.

[0050] In this embodiment, the input signal of the interferometer, i.e., the reflected light signal of the fiber optic grating array, is directly converted into an electrical signal by photoelectric conversion, and the resulting electrical signal is used as the original signal corresponding to the interferometric demodulator. The output signal of the interferometer, i.e., the interference light signal output after interfering the reflected light signal by the interferometer, is converted into an interference electrical signal by photoelectric conversion.

[0051] Step 120: Determine the integrity of the original signal. If the original signal is determined to be incomplete, then perform signal compensation on the original signal using a normalization method based on the original signal and the interference electrical signal.

[0052] Understandably, when the original signal in an interferometric demodulator is missing due to fiber breakage or environmental factors during practical applications, the problem cannot be detected solely by the interference signal output by the interferometer. Therefore, this embodiment of the invention acquires the original signal corresponding to the interferometric demodulator and determines its integrity to identify whether the fiber grating is faulty. When the original signal is determined to be incomplete, signal compensation is performed on the original signal using a normalization method based on the original signal and the interference electrical signal to prevent the degradation of the modulation signal due to the missing original signal from affecting the accuracy of the instrument measurement.

[0053] The signal compensation method for an interferometric demodulator provided in this invention can detect the integrity of the original signal in the interferometric demodulator. When a missing original signal is detected, the fiber grating corresponding to the missing signal is inspected to troubleshoot and resolve fiber breakage issues. This invention also compensates for incomplete original signals using a normalization method to prevent modulation signal degradation due to missing original signals from affecting the accuracy of instrument measurements.

[0054] Based on the above embodiments, as a preferred implementation, step 120, determining the integrity of the original signal, specifically includes:

[0055] The original signal data was grouped into 4-bit groups using PyCharm software. The resulting groups were then converted from hexadecimal to decimal. A function graph of the converted decimal values ​​was plotted, and the integrity of the original signal was determined based on the function graph.

[0056] In this embodiment, a function graph of the original signal was plotted, as shown in Figure 2. Figure 2(b) is the function graph of the original signal provided in this embodiment of the invention. Figure 2(a) is the function graph of the interference electrical signal provided by this invention. After obtaining the function graph of the original signal, the integrity of the original signal can be preliminarily determined by observing the continuity of the function graph.

[0057] Based on the above embodiments, as a preferred implementation, step 120, determining the integrity of the original signal, further includes:

[0058] Determine the noise floor range of the original signal, and define the effective signal region and the invalid signal region in the original signal based on the noise floor range; determine whether the original signal data in the effective signal region is within the noise floor range, and if so, determine that the original signal is incomplete.

[0059] Specifically, after grouping the raw signal data into 4-bit segments using PyCharm software, the data value of each 4-bit segment is calculated. The noise floor level can be estimated based on the mean and standard deviation of the data to determine the range of noise floor values, thereby defining the effective and ineffective signal regions in the raw signal. It is then determined whether the raw signal data within the effective signal region falls within the noise floor value range. If so, the raw signal is considered incomplete; otherwise, it is considered complete. The fiber gratings corresponding to the incomplete signal areas are inspected to identify and resolve fiber breakage issues.

[0060] Based on the above embodiments, as a preferred implementation, step 120, which involves performing signal compensation on the original signal using a normalization method based on the original signal and the interference electrical signal, specifically includes:

[0061] First, the acquired interference electrical signals and the original signals are saved, and peak finding is performed on the interference electrical signals and the original signals respectively using the centroid algorithm. Based on the centroid algorithm for peak finding of the interference electrical signals, in actual operation, the peak data of the interference electrical signals can be dephased, filtered, and demodulated to obtain the first peak data X1, X2, X3, ..., X... n The original electrical signal peak data is subjected to phase deconvolution, filtering, and demodulation processing to obtain the second peak data Y1, Y2, Y3, ..., Y... n Where n represents the total number of gratings in the interferometric demodulator, X n Y represents the peak value of the interference electrical signal corresponding to the nth grating. n This represents the peak value of the original signal corresponding to the nth grating;

[0062] Then, based on the first peak data and the second peak data, the normalization factor I corresponding to each peak is calculated. iI i =X i / Y i Record the normalization factor corresponding to the i-th grating interval as I1, I2, I3, ..., I n .

[0063] Next, an interval is defined for the current peak value of the original signal corresponding to each grating, ensuring that the number of original signal data in each interval is the same and contains the corresponding peak. Since the gratings are equally spaced, this embodiment calculates the number of original signal data k contained in each grating interval based on the total amount of original signal data M and the total number of gratings n in the interferometric demodulator, k = M / n.

[0064] Finally, the data of the p-th grating interval from left to right is recorded as D. p1 D p2 D p3 ,…,D pk Multiply each original signal data by the normalization factor I corresponding to its respective grating interval. p That is, to obtain the normalized data Ip*D of the interval in sequence. p1 ,Ip*D p2 ,Ip*D p3 ,…,Ip*D pk The normalization operation is repeated for each grating interval to finally normalize the original signal, thus completing the compensation of the original signal from the interferometric demodulator. The signal compensation result is as follows: Figure 3 As shown.

[0065] Figure 4 This is a structural block diagram of an embodiment of the signal compensation device for an interferometric demodulator provided by the present invention, as shown below. Figure 4 As shown, the signal compensation device of the interferometric demodulator includes:

[0066] The acquisition module 401 is used to acquire the original signal and the interference electrical signal corresponding to the interferometric demodulator. The original signal is an electrical signal obtained by photoelectric conversion of the input signal of the interferometer, and the interference electrical signal is an electrical signal obtained by photoelectric conversion of the interference light signal output by the interferometer.

[0067] The signal compensation module 402 is used to determine the integrity of the original signal. If the original signal is determined to be incomplete, the original signal is compensated by a normalization method based on the original signal and the interference electrical signal.

[0068] The signal compensation device for the interferometric demodulator provided in this embodiment of the invention can detect the integrity of the original signal in the interferometric demodulator. When a missing original signal is detected, the fiber grating corresponding to the missing signal is inspected to troubleshoot and resolve fiber breakage issues. This embodiment of the invention also compensates for incomplete original signals using a normalization method to prevent modulation signal degradation due to missing original signals from affecting the accuracy of instrument measurements.

[0069] Figure 5 This is a schematic diagram of a signal compensation system for an interferometric demodulator provided by the present invention, with reference to... Figure 5 The signal compensation system of the interferometric demodulator includes a laser, a pulse modulation module, a sensor network, a photoelectric conversion module, an interferometer, a data acquisition and processing module, and a host computer. The laser is connected to one end of an optical circulator via the pulse modulation module. The other end of the optical circulator is connected to the sensor network, one end of the interferometer, and one end of the photoelectric conversion module. The other end of the interferometer is communicatively connected to the photoelectric conversion module. The other end of the photoelectric conversion module is connected to one end of the data acquisition and processing module, and the other end of the data acquisition and processing module is connected to the host computer.

[0070] The laser is used to emit a beam to the pulse modulation module;

[0071] The pulse modulation module is used to modulate the acquired light beam into a pulsed optical signal and transmit it to the sensor network; (Refer to...) Figure 5 The pulse modulation module controls the on and off of the SOA (Semi-conductor Optical Amplifier) ​​device through a synchronous clock, modulating the continuous light from the laser into pulsed light.

[0072] The optical circulator is used to transmit the amplified pulsed optical signal to the sensing network, and to transmit the reflected optical signal output by the sensing network to the photoelectric conversion module and the interferometer, respectively.

[0073] The sensing network is used to output a reflected light signal of a specific wavelength after the acquired pulsed light signal is reflected by a fiber Bragg grating array, and to transmit the reflected light signal to a photoelectric conversion module and an interferometer respectively through an optical circulator. In this embodiment, the sensing network adopts a weakly reflective fiber Bragg grating array.

[0074] The interferometer is used to convert the collected reflected light signal into an interference light signal and output it to the photoelectric conversion module;

[0075] The photoelectric conversion module is used to convert the collected reflected light signal into an original signal and transmit it to the data acquisition and processing module, and to convert the collected interference light signal into an interference electrical signal and transmit it to the data acquisition and processing module.

[0076] The data acquisition and processing module is used to transmit the acquired raw signals and interference electrical signals to the host computer;

[0077] The host computer is used to determine the integrity of the acquired original signal. If the signal is determined to be incomplete, a normalization method is used to process the original signal and the interference electrical signal to perform signal compensation on the original signal.

[0078] Specifically, in actual operation, when it is necessary to perform integrity testing on the raw signal of the interferometric demodulator, the host computer sends a command to the data acquisition and processing module. The data acquisition and processing module then packages the stored raw signal and the interferometric electrical signal according to the communication protocol and sends it to the host computer. In this embodiment, the front-end ADC (Analog-to-Digital Converter) chip in the data acquisition and processing module can convert the received analog electrical signal into the required digital electrical signal and send it to the host computer. The host computer judges the integrity of the acquired raw signal. If the signal is determined to be incomplete, a normalization method is used to process the raw signal and the interferometric electrical signal to perform signal compensation on the raw signal.

[0079] The signal compensation system for the interferometric demodulator provided in this embodiment of the invention can detect the integrity of the original signal in the interferometric demodulator. When a missing original signal is detected, the fiber grating corresponding to the missing signal is inspected to troubleshoot and resolve fiber breakage issues. This embodiment of the invention also compensates for incomplete original signals using a normalization method to prevent modulation signal degradation due to missing original signals from affecting the accuracy of instrument measurements.

[0080] Based on the above embodiments, as a preferred implementation, the signal compensation system of the interferometric demodulator further includes a signal amplification module, and the pulse modulation module is connected to the optical circulator through the signal amplification module; the signal amplification module is used to amplify the power of the acquired pulse optical signal and transmit it to the optical circulator.

[0081] In this embodiment, the signal amplification module can use an EDFA (Erbium Doped Fiber Amplifier) ​​to amplify the pulsed optical signal and then transmit it to the sensor network through an optical circulator.

[0082] Based on the above embodiments, as a preferred implementation, the signal compensation system of the interferometric demodulator further includes a serial port transceiver module, and the data acquisition and processing module is connected to the host computer through the serial port transceiver module;

[0083] The serial transceiver module is used to send the received instructions from the host computer to the data acquisition and processing module, and to transmit the raw signals and interference electrical signals acquired by the data acquisition and processing module to the host computer.

[0084] In actual operation, when it is necessary to detect the original signal, the host computer sends a command to the data acquisition and processing module through the serial port receiver. The data acquisition and processing module packages the stored original signal and interference electrical signal according to the communication protocol, and then sends it to the host computer through the serial port transmitter.

[0085] Figure 6 A structural block diagram of an embodiment of the electronic device provided by the present invention is shown below. Figure 6 As shown, the present invention also provides an electronic device 600, which can be a mobile terminal, desktop computer, laptop, handheld computer, server, or other computing device. The electronic device 600 includes a processor 601 and a memory 602, wherein the memory 602 stores a signal compensation program 603 for an interferometric demodulator.

[0086] In some embodiments, memory 602 may be an internal storage unit of a computer device, such as a hard disk or memory. In other embodiments, memory 602 may be an external storage device of a computer device, such as a plug-in hard disk, smart media card (SMC), secure digital card (SD), flash card, etc. Further, memory 602 may include both internal and external storage units of the computer device. Memory 602 is used to store application software and various types of data installed on the computer device, such as program code for installing the computer device. Memory 602 can also be used to temporarily store data that has been output or will be output. In one embodiment, when the signal compensation program 603 of the interferometric demodulator is executed by processor 601, the following steps are implemented:

[0087] The original signal and the interference electrical signal corresponding to the interferometric demodulator are acquired, wherein the original signal is an electrical signal obtained by photoelectric conversion of the input signal of the interferometer, and the interference electrical signal is an electrical signal obtained by photoelectric conversion of the interference light signal output by the interferometer;

[0088] The integrity of the original signal is determined. If the original signal is determined to be incomplete, signal compensation is performed on the original signal based on the original signal and the interference electrical signal using a normalization method.

[0089] In some embodiments, processor 601 may be a central processing unit (CPU), microprocessor or other data processing chip, used to run program code stored in memory 602 or process data, such as executing the signal compensation program of an interferometric demodulator.

[0090] This embodiment also provides a computer-readable storage medium storing a signal compensation program for an interferometric demodulator. When the signal compensation program for the interferometric demodulator is executed by a processor, it performs the following steps:

[0091] The original signal and the interference electrical signal corresponding to the interferometric demodulator are acquired, wherein the original signal is an electrical signal obtained by photoelectric conversion of the input signal of the interferometer, and the interference electrical signal is an electrical signal obtained by photoelectric conversion of the interference light signal output by the interferometer;

[0092] The integrity of the original signal is determined. If the original signal is determined to be incomplete, signal compensation is performed on the original signal based on the original signal and the interference electrical signal using a normalization method.

[0093] Those skilled in the art will understand that all or part of the processes in the methods of the above embodiments can be implemented by a computer program instructing related hardware. The computer program can be stored in a non-volatile computer-readable storage medium, and when executed, it can include the processes of the embodiments of the above methods. Any references to memory, storage, databases, or other media used in the embodiments provided in this application can include non-volatile and / or volatile memory. Non-volatile memory can include read-only memory (ROM), programmable ROM (PROM), electrically programmable ROM (EPROM), electrically erasable programmable ROM (EEPROM), or flash memory. Volatile memory can include random access memory (RAM) or external cache memory. By way of illustration and not limitation, RAM is available in various forms, such as static RAM (SRAM), dynamic RAM (DRAM), synchronous DRAM (SDRAM), dual data rate SDRAM (DDRSDRAM), enhanced SDRAM (ESDRAM), synchronous link DRAM (SLDRAM), RAMbus direct RAM (RDRAM), direct memory bus dynamic RAM (DRDRAM), and RAMbus dynamic RAM (RDRAM), etc.

[0094] The above description is only a preferred embodiment of the present invention, but the scope of protection of the present invention is not limited thereto. Any changes or substitutions that can be easily conceived by those skilled in the art within the scope of the technology disclosed in the present invention should be included within the scope of protection of the present invention.

Claims

1. A signal compensation method for an interferometric demodulator, characterized in that, include: The original signal and the interference electrical signal corresponding to the interferometric demodulator are acquired, wherein the original signal is an electrical signal obtained by photoelectric conversion of the input signal of the interferometer, and the interference electrical signal is an electrical signal obtained by photoelectric conversion of the interference light signal output by the interferometer; The integrity of the original signal is determined. If the original signal is determined to be incomplete, signal compensation is performed on the original signal based on the original signal and the interference electrical signal using a normalization method. The step of performing signal compensation on the original signal based on the original signal and the interference electrical signal using a normalization method specifically includes: The interference electrical signal is peak-finding based on the centroid algorithm to obtain the first peak data, and the original signal is peak-finding based on the centroid algorithm to obtain the second peak data. Based on the first peak data and the second peak data, calculate the normalization factor corresponding to each peak. For each grating, an interval is defined for the current peak value of the original signal. Based on the total amount of data in the original signal and the total number of gratings in the interferometric demodulator, the number of original signal data contained in each grating interval is calculated. Each original signal data is multiplied by the normalization factor corresponding to its grating interval. The normalization operation is repeated for each grating interval until the original signal is normalized, and the signal compensation result of the original signal data is obtained.

2. The signal compensation method for the interferometric demodulator according to claim 1, characterized in that, Determining the integrity of the original signal specifically includes: The original signal data was grouped into 4-bit groups using PyCharm software. The resulting groups were then converted from hexadecimal to decimal. A function graph of the converted decimal values ​​was plotted, and the integrity of the original signal was determined based on the function graph.

3. The signal compensation method for the interferometric demodulator according to claim 1, characterized in that, Determining the integrity of the original signal also includes: Determine the noise floor range of the original signal, and define the effective signal region and the invalid signal region in the original signal based on the noise floor range; determine whether the original signal data in the effective signal region is within the noise floor range, and if so, determine that the original signal is incomplete.

4. A signal compensation device for an interferometric demodulator, characterized in that, include: The acquisition module is used to acquire the original signal and the interference electrical signal corresponding to the interferometric demodulator. The original signal is an electrical signal obtained by photoelectric conversion of the input signal of the interferometer, and the interference electrical signal is an electrical signal obtained by photoelectric conversion of the interference light signal output by the interferometer. The signal compensation module is used to determine the integrity of the original signal. If the original signal is determined to be incomplete, the original signal is compensated by a normalization method based on the original signal and the interference electrical signal. The step of performing signal compensation on the original signal based on the original signal and the interference electrical signal using a normalization method specifically includes: The interference electrical signal is peak-finding based on the centroid algorithm to obtain the first peak data, and the original signal is peak-finding based on the centroid algorithm to obtain the second peak data. Based on the first peak data and the second peak data, calculate the normalization factor corresponding to each peak. For each grating, an interval is defined for the current peak value of the original signal. Based on the total amount of data in the original signal and the total number of gratings in the interferometric demodulator, the number of original signal data contained in each grating interval is calculated. Each original signal data is multiplied by the normalization factor corresponding to its grating interval. The normalization operation is repeated for each grating interval until the original signal is normalized, and the signal compensation result of the original signal data is obtained.

5. A signal compensation system for an interferometric demodulator, characterized in that, The system includes a laser, a pulse modulation module, an optical circulator, a sensor network, a photoelectric conversion module, an interferometer, a data acquisition and processing module, and a host computer. The laser is connected to one end of the optical circulator via the pulse modulation module. The other end of the optical circulator is connected to the sensor network, one end of the interferometer, and one end of the photoelectric conversion module. The other end of the interferometer is communicatively connected to the photoelectric conversion module. The other end of the photoelectric conversion module is connected to one end of the data acquisition and processing module, and the other end of the data acquisition and processing module is connected to the host computer. The laser is used to emit a beam to the pulse modulation module; The pulse modulation module is used to modulate the acquired light beam into a pulsed light signal and transmit it to the sensor network; The optical circulator is used to transmit the amplified pulsed optical signal to the sensing network, and to transmit the reflected optical signal output by the sensing network to the photoelectric conversion module and the interferometer, respectively. The sensing network is used to output a reflected light signal of a specific wavelength after the collected pulse light signal is reflected by the fiber optic grating array, and to transmit the reflected light signal to the photoelectric conversion module and the interferometer respectively through the optical circulator. The interferometer is used to convert the collected reflected light signal into an interference light signal and output it to the photoelectric conversion module; The photoelectric conversion module is used to convert the collected reflected light signal into an original signal and transmit it to the data acquisition and processing module, and to convert the collected interference light signal into an interference electrical signal and transmit it to the data acquisition and processing module. The data acquisition and processing module is used to transmit the acquired raw signals and interference electrical signals to the host computer; The host computer is used to determine the integrity of the acquired raw signal. If the signal is determined to be incomplete, a normalization method is used to process the raw signal and the interference electrical signal to perform signal compensation on the raw signal. The step of performing signal compensation on the original signal based on the original signal and the interference electrical signal using a normalization method specifically includes: The interference electrical signal is peak-finding based on the centroid algorithm to obtain the first peak data, and the original signal is peak-finding based on the centroid algorithm to obtain the second peak data. Based on the first peak data and the second peak data, calculate the normalization factor corresponding to each peak. For each grating, an interval is defined for the current peak value of the original signal. Based on the total amount of data in the original signal and the total number of gratings in the interferometric demodulator, the number of original signal data contained in each grating interval is calculated. Each original signal data is multiplied by the normalization factor corresponding to its grating interval. The normalization operation is repeated for each grating interval until the original signal is normalized, and the signal compensation result of the original signal data is obtained.

6. The signal compensation system of the interferometric demodulator according to claim 5, characterized in that, It also includes a signal amplification module, and the pulse modulation module is connected to the optical circulator through the signal amplification module; The signal amplification module is used to amplify the power of the acquired pulsed light signal and transmit it to the optical circulator.

7. The signal compensation system of the interferometric demodulator according to claim 5, characterized in that, It also includes a serial port transceiver module, through which the data acquisition and processing module is connected to the host computer; The serial transceiver module is used to send the received instructions from the host computer to the data acquisition and processing module, and to transmit the raw signals and interference electrical signals acquired by the data acquisition and processing module to the host computer.

8. An electronic device, Its features are, Including memory and processor, among which, The memory is used to store programs; The processor, coupled to the memory, is used to execute the program stored in the memory to implement the steps in the signal compensation method of an interferometric demodulator as described in any one of claims 1 to 3.

9. A computer-readable storage medium, characterized in that, Used to store computer-readable programs or instructions, which, when executed by a processor, can implement the steps in the signal compensation system of an interferometric demodulator as described in any one of claims 1 to 3.

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