A micro-vibration signal measurement method, device and computer equipment

Abstract

The present invention relates to the field of signal communication technology, and specifically discloses a micro-vibration signal measurement method, device and computer equipment, including performing interference adjustment processing on a reference interference preprocessing signal at the current moment according to a preset interference coefficient of a reference interference preprocessing signal from a starting moment to the current moment, obtaining a reference interference output signal at the current moment, and then performing interference removal processing on a micro-vibration preprocessing signal to be measured at the current moment to obtain a target micro-vibration signal. The present invention performs interference adjustment processing on a reference interference preprocessing signal of a reference path to obtain a reference interference output signal with high accuracy, and then performs interference removal processing on a micro-vibration preprocessing signal to be measured through the reference interference output signal, thereby obtaining a target micro-vibration signal with high accuracy. By collecting two-path signals and adjusting and correcting interference in advance, the signal interference removal problem is fundamentally solved, and the measurement accuracy of micro-vibration signals is greatly improved.

Description

Technical Field

[0001] The present invention relates to the field of signal communication technology, and in particular to a micro-vibration signal measurement method, a micro-vibration signal measurement device and a computer device. Background Art

[0002] With the booming development of various new energy sources, the demand for automation, intelligence and digitalization upgrades in the traditional energy industry is becoming increasingly urgent. Installing electrical sensors in places with many safety hazards such as coal mines, oil and natural gas will bring safety hazards. In comparison, using fiber optic MEMS as a sensor has the advantages of being safer and more reliable. Therefore, under the concept of smart mines, fiber optic MEMS (Micro-Electro-Mechanical System) has received attention, and devices such as fiber optic MEMS pickups, fiber optic acceleration MEMS sensors, and fiber optic displacement MEMS sensors have been vigorously developed.

[0003] In addition, after an accident occurs, it is necessary to predict the accident and respond immediately. Different from traditional electrical sensors, fiber optic sensors have the characteristics of long transmission distance, more stable laser, and no need for power supply. They can meet the timely alarm needs of the energy industry, making them greatly promoted in the field of sensing and detection in high-risk industries.

[0004] In the prior art, optical fiber MEMS micro-vibration sensors are often installed in areas prone to deformation, such as roof, support beams, load-bearing columns, etc. Optical fiber MEMS micro-vibration sensors can also be installed on coal mining conveyors to monitor abnormal vibrations of the motor.

[0005] However, analog signals are easily interfered with during optical fiber transmission, which reduces the accuracy and reliability of optical fiber sensors in practical applications. In the prior art, the signals collected by optical fiber sensors are often de-noised by filtering with a bandpass filter and then using a DSP (Digital Signal Process) chip to run the terminal processing algorithm for de-interference. However, this method only adjusts the signal at the final stage of signal processing and does not fundamentally solve the problem of signal de-interference. The de-interference accuracy is low.

[0006] Therefore, how to solve the problem that micro-vibration simulation signals are easily interfered with during optical fiber transmission and improve the accuracy and reliability of micro-vibration simulation signals has become a technical problem that needs to be urgently solved by technical personnel in this field. Summary of the invention

[0007] The present invention provides a micro-vibration signal measurement method, a micro-vibration signal measurement device and a computer device, which solve the problems in the related art that micro-vibration analog signals are easily interfered during fiber transmission and the micro-vibration signal measurement accuracy is not high.

[0008] As a first aspect of the present invention, a method for measuring micro-vibration signals is provided, comprising:

[0009] Acquire a reference interference signal of the reference path optical fiber MEMS micro-vibration sensor at the current moment and a micro-vibration signal to be measured of the measurement path optical fiber MEMS micro-vibration sensor at the current moment, wherein the micro-vibration signal to be measured at the current moment includes an actual interference signal at the current moment;

[0010] Preprocessing the reference interference signal at the current moment and the micro-vibration signal to be measured at the current moment respectively to obtain the reference interference preprocessing signal at the current moment and the micro-vibration preprocessing signal to be measured at the current moment;

[0011] Performing interference adjustment processing on the reference interference preprocessing signal at the current moment according to the preset interference coefficient of the reference interference preprocessing signal from the starting moment to the current moment, to obtain the reference interference output signal at the current moment, wherein the starting moment refers to the starting moment of the preset sampling period in which the current moment is located;

[0012] According to the reference interference output signal at the current moment, the micro-vibration pre-processed signal to be measured at the current moment is de-interferenceed to obtain the target micro-vibration signal at the current moment. The target micro-vibration signal at the current moment includes the target interference signal at the current moment. The target interference signal at the current moment is smaller than the actual interference signal at the current moment and meets a preset accuracy threshold.

[0013] Further, preprocessing the reference interference signal at the current moment and the micro-vibration signal to be measured at the current moment respectively to obtain the reference interference preprocessed signal at the current moment and the micro-vibration preprocessed signal to be measured at the current moment includes:

[0014] The true effective value of the reference interference signal at the current moment and the true effective value of the micro-vibration signal to be measured at the current moment are calculated respectively to obtain the reference interference preprocessing signal at the current moment and the micro-vibration preprocessing signal to be measured at the current moment.

[0015] Further, interference adjustment processing is performed on the reference interference preprocessing signal at the current moment according to the preset interference coefficient of the reference interference preprocessing signal from the start moment to the current moment to obtain the reference interference output signal at the current moment, including:

[0016] According to the reference interference preprocessing signal from the starting time to the current time and the corresponding preset interference coefficient, the reference interference intermediate signal from the starting time to the current time is obtained respectively;

[0017] The reference interference output signal at the current moment is obtained according to the reference interference intermediate signal from the starting moment to the current moment.

[0018] Further, the interference removal process is performed on the micro-vibration pre-processed signal to be measured at the current moment according to the reference interference output signal at the current moment to obtain the target micro-vibration signal at the current moment, including:

[0019] The reference interference output signal at the current moment is subtracted from the micro-vibration pre-processed signal to be measured at the current moment to obtain the target micro-vibration signal at the current moment.

[0020] Further, after performing interference removal processing on the micro-vibration pre-processed signal to be measured at the current moment according to the reference interference output signal at the current moment to obtain the target micro-vibration signal at the current moment, it also includes:

[0021] The preset interference coefficient of the reference interference preprocessing signal at the current moment is updated to the optimized interference coefficient according to the reference interference preprocessing signal from the starting moment to the current moment and the target micro-vibration signal at the current moment.

[0022] Further updating the preset interference coefficient of the reference interference preprocessing signal at the current moment to the optimized interference coefficient according to the reference interference preprocessing signal from the start moment to the current moment and the target micro-vibration signal at the current moment, including:

[0023] Obtaining the optimized interference coefficient of each reference interference preprocessing signal at a time before the start time to the current time, the preset interference coefficient of the reference interference preprocessing signal at the current time, and each reference interference preprocessing signal at the start time to the current time;

[0024] According to the optimized interference coefficient of each reference interference preprocessing signal at the previous moment from the starting moment to the current moment, the preset interference coefficient of the reference interference preprocessing signal at the current moment, and each reference interference preprocessing signal from the starting moment to the current moment, the preset interference coefficient of the reference interference preprocessing signal at the current moment is updated as the optimized interference coefficient, wherein the optimized interference coefficient of the reference interference preprocessing signal at the current moment can minimize the mean square value of the target micro-vibration signal at the current moment;

[0025] Among them, the optimized interference coefficient of the reference interference preprocessing signal at the starting moment is obtained according to the reference interference preprocessing signal at the starting moment and the preset interference coefficient of the reference interference preprocessing signal at the starting moment, and the optimized interference coefficient of the reference interference preprocessing signal at the starting moment can minimize the mean square value of the target micro-vibration signal at the starting moment.

[0026] Further, interference adjustment processing is performed on the reference interference preprocessing signal at the current moment according to the preset interference coefficient of the reference interference preprocessing signal from the start moment to the current moment to obtain the reference interference output signal at the current moment, including:

[0027] Obtaining a preset interference coefficient of a reference interference preprocessing signal at the current moment;

[0028] Obtaining a reference interference intermediate signal at the current moment according to a preset interference coefficient of the reference interference preprocessing signal at the current moment and the reference interference preprocessing signal at the current moment;

[0029] Obtaining an optimized interference coefficient of a reference interference preprocessing signal at a time before the start time to the current time;

[0030] According to each reference interference preprocessing signal at a moment before the starting moment to the current moment and the corresponding optimized interference coefficient, a reference interference optimized intermediate signal at a moment before the starting moment to the current moment is obtained respectively;

[0031] The reference interference preprocessing signal at the current moment is subjected to interference adjustment processing according to each reference interference optimization intermediate signal at the moment before the start moment to the current moment and the reference interference intermediate signal at the current moment to obtain the reference interference output signal at the current moment.

[0032] As another aspect of the present invention, a micro-vibration signal measuring device is provided, which is used to implement the above-mentioned signal interference removal method, including: a measurement path signal acquisition module, a reference path signal acquisition module, a preprocessing module, an interference adjustment module and an interference removal module;

[0033] The preprocessing module is electrically connected to the measurement path signal acquisition module, the reference path signal acquisition module, the interference adjustment module and the interference removal module respectively, and the interference adjustment module is also electrically connected to the interference removal module;

[0034] The reference path signal acquisition module is used to obtain the reference interference signal of the reference path optical fiber MEMS micro-vibration sensor at the current moment;

[0035] The measurement path signal acquisition module is used to obtain the micro-vibration signal to be measured at the current moment of the optical fiber MEMS micro-vibration sensor of the measurement path, wherein the micro-vibration signal to be measured at the current moment includes the actual interference signal at the current moment;

[0036] The preprocessing module is used to preprocess the reference interference signal at the current moment and the micro-vibration signal to be measured at the current moment, respectively, to obtain the reference interference preprocessing signal at the current moment and the micro-vibration preprocessing signal to be measured at the current moment;

[0037] The interference adjustment module is used to perform interference adjustment processing on the reference interference preprocessing signal at the current moment according to the preset interference coefficient of the reference interference preprocessing signal from the starting moment to the current moment, so as to obtain the reference interference output signal at the current moment, wherein the starting moment refers to the starting moment of the preset sampling period in which the current moment is located;

[0038] The interference removal module is used to perform interference removal processing on the micro-vibration pre-processed signal to be measured at the current moment according to the reference interference output signal at the current moment, and obtain the target micro-vibration signal at the current moment. The target micro-vibration signal at the current moment includes the target interference signal at the current moment. The target interference signal at the current moment is smaller than the actual interference signal at the current moment and meets the preset accuracy threshold.

[0039] Furthermore, a micro-vibration signal measuring device also includes an interference adjustment optimization module;

[0040] The interference adjustment and optimization module is electrically connected to the interference adjustment module and the interference removal module respectively;

[0041] The interference adjustment optimization module is used to update the preset interference coefficient of the reference interference preprocessing signal at the current moment to the optimized interference coefficient according to the reference interference preprocessing signal from the starting moment to the current moment and the target micro-vibration signal at the current moment.

[0042] As another aspect of the present invention, a computer device is provided, including a processor and a memory, wherein the memory is used to store computer instructions, and the computer instructions are loaded and executed by the processor to implement the above-mentioned micro-vibration signal measurement method.

[0043] The present invention pre-processes the reference interference signal collected by the reference path optical fiber MEMS micro-vibration sensor and the micro-vibration signal to be measured collected by the measurement path optical fiber MEMS micro-vibration sensor to obtain the reference interference pre-processed signal and the micro-vibration pre-processed signal to be measured, and then performs interference adjustment processing on the reference interference pre-processed signal to obtain a reference interference output signal with high precision, and then performs interference removal processing on the micro-vibration pre-processed signal to be measured through the reference interference output signal to further obtain a high-precision target micro-vibration signal. By collecting two-path signals and adjusting and correcting the interference in advance, the problem of interference removal of the micro-vibration signal is fundamentally solved, and the measurement accuracy of the micro-vibration signal is greatly improved. BRIEF DESCRIPTION OF THE DRAWINGS

[0044] The accompanying drawings are used to provide further understanding of the present invention and constitute a part of the specification. Together with the following specific embodiments, they are used to explain the present invention, but do not constitute a limitation of the present invention.

[0045] Figure 1 A brief flow chart of a micro-vibration signal measurement method provided by the present invention.

[0046] Figure 2 A brief flow chart of obtaining the reference interference output signal at the current moment provided by the present invention.

[0047] Figure 3 The present invention provides another simplified flow chart of a micro-vibration signal measurement method.

[0048] Figure 4 It is a signal transmission schematic diagram of a micro-vibration signal measurement method provided by the present invention.

[0049] Figure 5 It is a brief flow chart of obtaining the optimized interference coefficient provided by the present invention.

[0050] Figure 6 This is another brief flow chart for obtaining the reference interference output signal at the current moment provided by the present invention.

[0051] Figure 7 It is a schematic diagram of the interference adjustment process provided by the present invention.

[0052] Figure 8 It is a brief structural schematic diagram of a micro-vibration signal measuring device provided by the present invention. DETAILED DESCRIPTION

[0053] It should be noted that, in the absence of conflict, the embodiments of the present invention and the features in the embodiments may be combined with each other. The present invention will be described in detail below with reference to the accompanying drawings and in combination with the embodiments.

[0054] In order to enable those skilled in the art to better understand the scheme of the present invention, the technical scheme in the embodiment of the present invention will be clearly and completely described below in conjunction with the drawings in the embodiment of the present invention. Obviously, the described embodiment is only a part of the embodiment of the present invention, not all of the embodiments. Based on the embodiments of the present invention, all other embodiments obtained by ordinary technicians in this field without making creative work should fall within the scope of protection of the present invention.

[0055] It should be noted that the terms "first", "second", etc. in the specification and claims of the present invention and the above-mentioned drawings are used to distinguish similar objects, and are not necessarily used to describe a specific order or sequence. It should be understood that the data used in this way can be interchanged where appropriate, so as to describe the embodiments of the present invention described herein. In addition, the terms "including" and "having" and any variations thereof are intended to cover non-exclusive inclusions, for example, a process, method, system, product or device that includes a series of steps or units is not necessarily limited to those steps or units clearly listed, but may include other steps or units that are not clearly listed or inherent to these processes, methods, products or devices.

[0056] The embodiment of the present invention provides a method for measuring micro-vibration signals. Figure 1 As shown, including:

[0057] S100, obtaining a reference interference signal of a reference path optical fiber MEMS micro-vibration sensor at a current moment and a micro-vibration signal to be measured of a measurement path optical fiber MEMS micro-vibration sensor at a current moment, wherein the micro-vibration signal to be measured at a current moment includes an actual interference signal at a current moment;

[0058] The reference interference signal c'(t) and the micro-vibration signal to be measured y'(t) in the embodiment of the present invention are obtained by two optical fiber MEMS micro-vibration sensors, wherein t=1, 2, ..., E, E moments represent a sampling period, and the sampling period is preset according to actual needs.

[0059] The difference between the two is that the fiber optic MEMS micro-vibration sensor of the reference path only collects and provides a reference interference signal c'(t), while the micro-vibration signal to be measured collected by the fiber optic MEMS micro-vibration sensor of the measuring path includes both the actual micro-vibration signal and the actual interference signal.

[0060] It should be understood that due to the influence of factors such as fiber fusion points, fiber flange connection points, fiber transmission loss, fiber breakage and signal attenuation during the signal acquisition process, the reference interference signal c'(t) collected by the reference path fiber optic MEMS micro-vibration sensor is not completely equivalent to the actual interference signal contained in the micro-vibration signal to be measured collected by the measurement path fiber optic MEMS micro-vibration sensor.

[0061] S200, preprocessing the reference interference signal at the current moment and the micro-vibration signal to be measured at the current moment respectively to obtain the reference interference preprocessed signal at the current moment and the micro-vibration preprocessed signal to be measured at the current moment;

[0062] In an embodiment of the present invention, the reference interference signal c'(t) of the reference path optical fiber MEMS micro-vibration sensor at the current moment and the micro-vibration signal y'(t) to be measured of the measurement path optical fiber MEMS micro-vibration sensor at the current moment are preprocessed to obtain the reference interference preprocessed signal c(t) at the current moment and the micro-vibration preprocessed signal y(t) to be measured at the current moment, including:

[0063] S210, respectively calculate the true effective value of the reference interference signal c'(t) at the current moment and the true effective value of the micro-vibration signal to be measured y'(t) at the current moment, and obtain the reference interference preprocessed signal c(t) at the current moment and the micro-vibration preprocessed signal to be measured y(t) at the current moment.

[0064] Specifically, the embodiment of the present invention preprocesses the reference interference signal c'(t) collected by the reference path fiber optic MEMS micro-vibration sensor and the micro-vibration signal y'(t) to be measured collected by the measurement path fiber optic MEMS micro-vibration sensor through a TRMS / DC converter (true effective value / direct current converter), so as to accurately and in real time obtain the TRMS true effective value of the voltage waveform of the reference interference signal c'(t) of the reference path fiber optic MEMS micro-vibration sensor and the micro-vibration signal y'(t) to be measured of the measurement path fiber optic MEMS micro-vibration sensor, that is, obtain the reference interference preprocessed signal c(t) and the micro-vibration preprocessed signal y(t) to be measured, without considering problems such as waveform parameters and distortion.

[0065] S300, performing interference adjustment processing on the reference interference preprocessing signal at the current moment according to the preset interference coefficient of the reference interference preprocessing signal from the start moment to the current moment, to obtain the reference interference output signal at the current moment, wherein the start moment refers to the start moment of the preset sampling period in which the current moment is located;

[0066] Specifically, the embodiment of the present invention sets an interference coefficient in advance for the reference interference preprocessing signal c(t) corresponding to each moment in a sampling period according to actual conditions such as fiber fusion points, fiber flange connection points, fiber transmission loss, fiber breakage and signal attenuation, that is, a preset interference coefficient x(t), and performs interference adjustment processing on the reference interference preprocessing signal c(t) at the current moment through the preset interference coefficient x(t) of the reference interference preprocessing signal from the start moment to the current moment to obtain a reference interference output signal n(t) with higher accuracy. The start moment here refers to the start moment in the sampling period in which the current moment is located. Adjusting the reference interference preprocessing signal c(t) by the preset interference coefficient can effectively solve the problem that the reference interference signal collected by the optical fiber MEMS micro-vibration sensor of the reference path is affected by factors such as fiber fusion points, fiber flange connection points, fiber transmission loss, fiber breakage and signal attenuation, and deviates from the actual interference signal of the measurement path, thereby affecting the accuracy of the target micro-vibration signal.

[0067] S400. De-interference the micro-vibration pre-processed signal to be measured at the current moment according to the reference interference output signal at the current moment to obtain the target micro-vibration signal at the current moment. The target micro-vibration signal at the current moment includes the target interference signal at the current moment. The target interference signal at the current moment is smaller than the actual interference signal at the current moment and meets a preset accuracy threshold.

[0068] Specifically, after the embodiment of the present invention obtains the reference interference output signal n(t) at the current moment, it performs interference removal processing on the micro-vibration preprocessing signal y(t) to be measured according to the signal. The target interference signal in the obtained target micro-vibration signal m(t) is smaller than the actual interference signal and meets the preset accuracy threshold. At this time, the target micro-vibration signal m(t) at the current moment can be as close as possible to the actual micro-vibration signal contained in the micro-vibration signal to be measured, thereby greatly improving the measurement accuracy of the micro-vibration signal.

[0069] In summary, the embodiment of the present invention preprocesses the reference interference signal collected by the reference path optical fiber MEMS micro-vibration sensor and the micro-vibration signal to be measured collected by the measurement path optical fiber MEMS micro-vibration sensor to obtain the reference interference preprocessing signal and the micro-vibration preprocessing signal to be measured, and then performs interference adjustment processing on the reference interference preprocessing signal to obtain a reference interference output signal with higher precision, and then uses the reference interference output signal to perform interference removal processing on the micro-vibration preprocessing signal to be measured, and further obtains a high-precision target micro-vibration signal. By collecting two signals and adjusting and correcting the interference in advance, the problem of interference removal of the micro-vibration signal is fundamentally solved, and the measurement accuracy of the micro-vibration signal is greatly improved.

[0070] Furthermore, if Figure 2 As shown, according to the preset interference coefficient of the reference interference preprocessing signal from the starting time to the current time, the reference interference preprocessing signal at the current time is subjected to interference adjustment processing to obtain the reference interference output signal at the current time, including:

[0071] S310, obtaining reference interference intermediate signals from the starting time to the current time according to the reference interference preprocessing signals from the starting time to the current time and the corresponding preset interference coefficients;

[0072] Specifically, the product of the reference interference preprocessing signal c(t) from the start time to the current time and the corresponding preset interference coefficient x(t) is calculated respectively to obtain the reference interference intermediate signal from the start time to the current time.

[0073] S320. Obtain a reference interference output signal at a current moment according to a reference interference intermediate signal from a starting moment to a current moment.

[0074] Specifically, the reference interference output signal n(t) at the current moment is obtained according to the reference interference intermediate signal from the start moment to the current moment as shown in the following formula (1):

[0075]

[0076] Among them, X(t)=[x(t-E+1),······,x(t-1),x(t)] T, C(t)=[c(t-E+1),······,c(t-1),c(t)] T .

[0077] It should be understood that the interference adjustment may be in the form of finite impulse response, infinite impulse response, lattice anti-interference, etc. These forms are only reflected in the algorithm differences, and the present invention does not limit this. Formula (1) given in the embodiment of the present invention is only an example.

[0078] Further, the interference removal process is performed on the micro-vibration pre-processed signal to be measured at the current moment according to the reference interference output signal at the current moment to obtain the target micro-vibration signal at the current moment, including:

[0079] S410 , subtracting the reference interference output signal at the current moment from the micro-vibration pre-processed signal to be measured at the current moment to obtain the target micro-vibration signal at the current moment.

[0080] Specifically, the embodiment of the present invention subtracts the reference interference output signal n(t) at the current moment from the micro-vibration pre-processed signal y(t) to be measured at the current moment through a subtractor to obtain the target micro-vibration signal m(t) of the optical fiber MEMS micro-vibration sensor of the measurement path at the current moment. The specific expression is shown in the following formula (2):

[0081] m(t)=y(t)-n(t)(2).

[0082] Furthermore, if Figure 3 and Figure 4 As shown, after the interference removal processing is performed on the micro-vibration pre-processed signal to be measured at the current moment according to the reference interference output signal at the current moment and the target micro-vibration signal at the current moment is obtained, the following further includes:

[0083] S500: updating a preset interference coefficient of a reference interference preprocessing signal at a current moment into an optimized interference coefficient according to the reference interference preprocessing signal from a starting moment to a current moment and a target micro-vibration signal at a current moment.

[0084] In order to further improve the anti-interference degree and thus obtain a target micro-vibration signal with higher accuracy, an embodiment of the present invention optimizes the preset interference coefficient of the reference interference pre-processing signal at the current moment through the reference interference pre-processing signal from the starting moment to the current moment and the target micro-vibration signal at the current moment, obtains the optimized interference coefficient x'(t), and updates the original preset interference coefficient x(t) to the optimized interference coefficient x'(t), the optimized interference coefficient x'(t) participates in the calculation of the reference interference output signal at the next moment, and the optimized interference coefficients at each moment obtained in the current sampling period participate in the measurement of the next period, further solving the problem of inconsistent optical fiber quality, inconsistent fusion point loss, and inconsistent high-frequency interference between the reference path and the measurement path. In the case of large environmental noise, there will be some differences between the actual interference signal contained in the micro-vibration signal to be measured collected by the optical fiber MEMS micro-vibration sensor of the measurement path and the reference interference signal collected by the optical fiber MEMS micro-vibration sensor of the reference path, affecting the measurement accuracy of the target micro-vibration signal.

[0085] Furthermore, if Figure 5 As shown, the preset interference coefficient of the reference interference preprocessing signal at the current moment is updated to the optimized interference coefficient according to the reference interference preprocessing signal from the start time to the current moment and the target micro-vibration signal at the current moment, including:

[0086] S510, obtaining the optimized interference coefficient of each reference interference preprocessing signal from the start time to the previous time of the current time, the preset interference coefficient of the reference interference preprocessing signal at the current time, and each reference interference preprocessing signal from the start time to the current time;

[0087] Specifically, the embodiment of the present invention obtains the optimized interference coefficients x'(t-E+1),...,x'(t-2),x'(t-1) of each reference interference preprocessing signal from the start time to the previous time of the current time, and the preset interference coefficient x(t) of the reference interference preprocessing signal at the current time, and then obtains a weight coefficient vector according to the optimized interference coefficient of each reference interference preprocessing signal from the start time to the previous time of the current time and the preset interference coefficient of the reference interference preprocessing signal at the current time; the weight coefficient vector is shown in formula (3):

[0088] X(t)=[x'(t-E+1),·······,x'(t-1),x(t)] T (3).

[0089] After acquiring each reference interference preprocessing signal c(t-E+1),...,c(t-1),c(t) from the start time to the current time, the embodiment of the present invention obtains a reference interference preprocessing signal regression vector according to each reference interference preprocessing signal from the start time to the current time; specifically, the reference interference preprocessing signal regression vector is shown in formula (4):

[0090] C(t)=[c(t-E+1),······,c(t-1),c(t)] T (4).

[0091] S520, updating the preset interference coefficient of the reference interference preprocessing signal at the current moment to the optimized interference coefficient according to the optimized interference coefficient of each reference interference preprocessing signal at the previous moment from the starting moment to the current moment, the preset interference coefficient of the reference interference preprocessing signal at the current moment, and each reference interference preprocessing signal from the starting moment to the current moment, wherein the optimized interference coefficient of the reference interference preprocessing signal at the current moment can minimize the mean square value of the target micro-vibration signal at the current moment;

[0092] Among them, the optimized interference coefficient of the reference interference preprocessing signal at the starting moment is obtained according to the reference interference preprocessing signal at the starting moment and the preset interference coefficient of the reference interference preprocessing signal at the starting moment, and the optimized interference coefficient of the reference interference preprocessing signal at the starting moment can minimize the mean square value of the target micro-vibration signal at the starting moment.

[0093] Specifically, the embodiment of the present invention adjusts the preset interference coefficient x(t) of the reference interference preprocessing signal at the current moment to the optimized interference coefficient x'(t) so that the mean square value s(t) of the target micro-vibration signal at the current moment is minimized, so that the reference interference output signal n(t) is infinitely close to the actual interference signal in the micro-vibration signal y(t) to be measured of the optical fiber MEMS micro-vibration sensor in the measurement path, and the target interference signal in the target micro-vibration signal m(t) is smaller than the actual interference signal and meets the preset accuracy threshold, that is, the target micro-vibration signal m(t) is infinitely close to the actual micro-vibration signal. The mean square value s(t) of the target micro-vibration signal at the current moment is specifically as shown in the following formula (5):

[0094] s(t)=M[m 2 (t)](5),

[0095] Where, m(t)=y(t)-n(t), X(t)=[x'(t-E+1),·······,x'(t-1),x(t)] T , C(t)=[c(t-E+1),······,c(t-1),c(t)] T .

[0096] If the mean square value s(t) of the target micro-vibration signal at the current moment is the smallest, there exists M[m(t)M(t)]=0, so The value of is minimized, thereby obtaining the optimized interference coefficient x'(t).

[0097] Furthermore, if Figure 6 and Figure 7 As shown, according to the preset interference coefficient of the reference interference preprocessing signal from the starting time to the current time, the reference interference preprocessing signal at the current time is subjected to interference adjustment processing to obtain the reference interference output signal at the current time, including:

[0098] S310a, obtaining a preset interference coefficient of a reference interference preprocessing signal at the current moment;

[0099] Specifically, a preset interference coefficient x(t) of the reference interference preprocessing signal at the current moment is obtained.

[0100] S320a, obtaining a reference interference intermediate signal at the current moment according to a preset interference coefficient of the reference interference preprocessing signal at the current moment and the reference interference preprocessing signal at the current moment;

[0101] Specifically, the reference interference intermediate signal at the current moment is obtained as x(t)·c(t).

[0102] S330a, obtaining an optimized interference coefficient of a reference interference preprocessing signal from the start time to the moment before the current time;

[0103] Specifically, the optimized interference coefficients of the reference interference preprocessing signal at the moment before the acquisition start moment to the current moment are x'(t-E+1),...,x'(t-2),x'(t-1).

[0104] S340a, obtaining reference interference optimized intermediate signals at a moment before the start time to the current moment according to each reference interference preprocessing signal at a moment before the start time to the current moment and the corresponding optimized interference coefficient;

[0105] Specifically, the reference interference optimized intermediate signal from the acquisition start time to the moment before the current time is x'(t-E+1)c(t-E+1),...,x'(t-2)c(t-2),x'(t-1)c(t-1).

[0106] S350a, performing interference adjustment processing on the reference interference preprocessing signal at the current moment according to each reference interference optimization intermediate signal at the moment before the start moment to the current moment and the reference interference intermediate signal at the current moment, to obtain the reference interference output signal at the current moment.

[0107] Specifically, the expression of the reference interference output signal at the current moment is shown in the following formula (7):

[0108] ”'

[0109] n(t)=x(t)·c(t)+x(t-1)c(t-1)+x(t-2)c(t-2)+······+x(t-E+1)c(t-E+1)(7).

[0110] The above interference regulation adopts a linear structure, and the structure is stable. The degree of anti-interference can be gradually improved by increasing the number of iterations, and accurate micro-vibration signals to be measured can be effectively obtained.

[0111] Another embodiment of the present invention provides a micro-vibration signal measuring device 100, such as Figure 8 As shown, it includes: a measurement path signal acquisition module 110, a reference path signal acquisition module 120, a pre-processing module 130, an interference adjustment module 140 and an interference removal module 150;

[0112] The preprocessing module 130 is electrically connected to the measurement path signal acquisition module 110, the reference path signal acquisition module 120, the interference adjustment module 140 and the interference removal module 150 respectively, and the interference adjustment module 140 is also electrically connected to the interference removal module 150;

[0113] The reference path signal acquisition module 120 is used to obtain the reference interference signal of the reference path optical fiber MEMS micro-vibration sensor at the current moment;

[0114] Specifically, the reference path signal acquisition module 120 in this embodiment is an optical fiber MEMS micro-vibration sensor.

[0115] The measurement path signal acquisition module 110 is used to obtain the micro-vibration signal to be measured at the current moment of the optical fiber MEMS micro-vibration sensor of the measurement path, wherein the micro-vibration signal to be measured at the current moment includes the actual interference signal at the current moment;

[0116] Similarly, the measurement path signal acquisition module 110 in this embodiment is also an optical fiber MEMS micro-vibration sensor. The reference path signal acquisition module 120 and the measurement path signal acquisition module 110 both perform sampling according to a preset sampling period.

[0117] The preprocessing module 130 is used to preprocess the reference interference signal at the current moment and the micro-vibration signal to be measured at the current moment, respectively, to obtain the reference interference preprocessing signal at the current moment and the micro-vibration preprocessing signal to be measured at the current moment;

[0118] Specifically, the preprocessing module 130 in the embodiment of the present invention is a TRMS / DC converter (true effective value / direct current converter), which preprocesses the reference interference signal collected by the reference path optical fiber MEMS micro-vibration sensor and the micro-vibration signal to be measured collected by the measuring path optical fiber MEMS micro-vibration sensor through the TRMS / DC converter, and can accurately and real-time obtain the TRMS true effective value of the voltage waveform of the reference interference signal of the reference path optical fiber MEMS micro-vibration sensor and the micro-vibration signal to be measured of the measuring path optical fiber MEMS micro-vibration sensor, that is, obtain the reference interference preprocessing signal and the micro-vibration preprocessing signal to be measured, without considering waveform parameters and distortion.

[0119] The interference adjustment module 140 is used to perform interference adjustment processing on the reference interference preprocessing signal at the current moment according to the preset interference coefficient of the reference interference preprocessing signal from the start moment to the current moment, so as to obtain the reference interference output signal at the current moment, wherein the start moment refers to the start moment of the preset sampling period in which the current moment is located;

[0120] Specifically, the embodiment of the present invention pre-sets the interference coefficient at each moment in a sampling period according to actual conditions such as optical fiber fusion points, optical fiber flange connection points, optical fiber transmission loss, and optical fiber breakage to obtain a preset interference coefficient of a reference interference preprocessing signal, and performs interference adjustment processing on the reference interference preprocessing signal at the current moment through the preset interference coefficient of the reference interference preprocessing signal from the start moment to the current moment to obtain a reference interference output signal with higher accuracy. This can effectively solve the problem that the reference interference signal collected by the optical fiber MEMS micro-vibration sensor of the reference path is affected by factors such as optical fiber fusion points, optical fiber flange connection points, optical fiber transmission loss, optical fiber breakage, and signal attenuation, and deviates from the actual interference signal in the micro-vibration signal to be measured, thereby affecting the accuracy of the target micro-vibration signal.

[0121] The interference removal module 150 is used to perform interference removal processing on the micro-vibration pre-processed signal to be measured at the current moment according to the reference interference output signal at the current moment, and obtain the target micro-vibration signal at the current moment. The target micro-vibration signal at the current moment includes the target interference signal at the current moment. The target interference signal at the current moment is smaller than the actual interference signal at the current moment and meets the preset accuracy threshold.

[0122] The embodiment of the present invention preprocesses the reference interference signal collected by the reference path optical fiber MEMS micro-vibration sensor and the micro-vibration signal to be measured collected by the measurement path optical fiber MEMS micro-vibration sensor to obtain the reference interference preprocessing signal and the micro-vibration preprocessing signal to be measured, and then performs interference adjustment processing on the reference interference preprocessing signal to obtain a reference interference output signal with higher accuracy, and then performs interference removal processing on the micro-vibration preprocessing signal to be measured through the reference interference output signal to further obtain a high-precision target micro-vibration signal. By collecting two-way signals and adjusting and correcting the interference in advance, the problem of interference removal of the micro-vibration signal is fundamentally solved, and the measurement accuracy of the micro-vibration signal is greatly improved.

[0123] Furthermore, if Figure 8 As shown, the micro-vibration signal measuring device 100 further includes an interference adjustment optimization module 160;

[0124] The interference adjustment optimization module 160 is electrically connected to the interference adjustment module 140 and the interference removal module 150 respectively;

[0125] The interference adjustment optimization module 160 is used to update the preset interference coefficient of the reference interference preprocessing signal at the current moment into the optimized interference coefficient according to the reference interference preprocessing signal from the starting moment to the current moment and the target micro-vibration signal at the current moment.

[0126] In order to further improve the anti-interference degree and thus obtain a higher precision micro-vibration signal to be measured, the embodiment of the present invention optimizes the preset interference coefficient of the reference interference pre-processing signal at the current moment according to the reference interference pre-processing signal from the starting moment to the current moment and the target micro-vibration signal at the current moment through the interference adjustment optimization module 160, obtains the optimized interference coefficient, and updates the original preset interference coefficient to the optimized interference coefficient. The optimized interference coefficient participates in the calculation of the reference interference output signal at the next moment, further solving the problem of inconsistent optical fiber quality, inconsistent fusion point loss, and inconsistent high-frequency interference between the reference path and the measurement path. In the case of large environmental noise, there will be some differences between the actual interference signal contained in the micro-vibration signal to be measured collected by the optical fiber MEMS micro-vibration sensor of the measurement path and the reference interference signal collected by the optical fiber MEMS micro-vibration sensor of the reference path, which affects the measurement accuracy of the target micro-vibration signal.

[0127] Yet another embodiment of the present invention provides a computer device, including a processor and a memory, wherein the memory is used to store computer instructions, and the computer instructions are loaded and executed by the processor to implement the above-mentioned micro-vibration signal measurement method.

[0128] The specific working principle and effect of the computer device provided by the embodiment of the present invention can be referred to the above description of the micro-vibration signal measurement method, which will not be elaborated here.

[0129] It is to be understood that the above embodiments are merely exemplary embodiments used to illustrate the principles of the present invention, but the present invention is not limited thereto. For those of ordinary skill in the art, various modifications and improvements can be made without departing from the spirit and essence of the present invention, and these modifications and improvements are also considered to be within the scope of protection of the present invention.

Claims

1. A micro-vibration signal measurement method, characterized in that: include: Acquire a reference interference signal of the reference path optical fiber MEMS micro-vibration sensor at the current moment and a micro-vibration signal to be measured of the measurement path optical fiber MEMS micro-vibration sensor at the current moment, wherein the micro-vibration signal to be measured at the current moment includes an actual interference signal at the current moment; Preprocessing the reference interference signal at the current moment and the micro-vibration signal to be measured at the current moment respectively to obtain the reference interference preprocessed signal at the current moment and the micro-vibration preprocessed signal to be measured at the current moment; Performing interference adjustment processing on the reference interference preprocessing signal at the current moment according to the preset interference coefficient of the reference interference preprocessing signal from the starting moment to the current moment, to obtain the reference interference output signal at the current moment, wherein the starting moment refers to the starting moment of the preset sampling period in which the current moment is located; Performing interference removal processing on the micro-vibration pre-processed signal to be measured at the current moment according to the reference interference output signal at the current moment to obtain a target micro-vibration signal at the current moment, wherein the target micro-vibration signal at the current moment includes the target interference signal at the current moment, and the target interference signal at the current moment is less than the actual interference signal at the current moment and meets a preset accuracy threshold; After performing interference removal processing on the micro-vibration pre-processed signal to be measured at the current moment according to the reference interference output signal at the current moment to obtain the target micro-vibration signal at the current moment, the method further includes: The preset interference coefficient of the reference interference preprocessing signal at the current moment is updated to the optimized interference coefficient according to the reference interference preprocessing signal from the starting moment to the current moment and the target micro-vibration signal at the current moment.

2. The method according to claim 1, characterized in that The preprocessing of the reference interference signal at the current moment and the micro-vibration signal to be measured at the current moment respectively to obtain the reference interference preprocessed signal at the current moment and the micro-vibration preprocessed signal to be measured at the current moment includes: The true effective value of the reference interference signal at the current moment and the true effective value of the micro-vibration signal to be measured at the current moment are calculated respectively to obtain the reference interference preprocessing signal at the current moment and the micro-vibration preprocessing signal to be measured at the current moment.

3. The method according to claim 1, characterized in that The step of performing interference adjustment processing on the reference interference preprocessing signal at the current moment according to the preset interference coefficient of the reference interference preprocessing signal from the starting moment to the current moment to obtain the reference interference output signal at the current moment includes: According to the reference interference preprocessing signal from the starting time to the current time and the corresponding preset interference coefficient, the reference interference intermediate signal from the starting time to the current time is obtained respectively; The reference interference output signal at the current moment is obtained according to the reference interference intermediate signal from the starting moment to the current moment.

4. The method according to claim 1, characterized in that: The step of performing interference removal processing on the micro-vibration pre-processed signal to be measured at the current moment according to the reference interference output signal at the current moment to obtain the target micro-vibration signal at the current moment includes: The reference interference output signal at the current moment is subtracted from the micro-vibration pre-processed signal to be measured at the current moment to obtain the target micro-vibration signal at the current moment.

5. The method according to claim 1, characterized in that The updating of the preset interference coefficient of the reference interference preprocessing signal at the current moment according to the reference interference preprocessing signal from the starting moment to the current moment and the target micro-vibration signal at the current moment to the optimized interference coefficient includes: Obtaining the optimized interference coefficient of each of the reference interference preprocessing signals at a moment before the start moment to the current moment, the preset interference coefficient of the reference interference preprocessing signal at the current moment, and each of the reference interference preprocessing signals at the start moment to the current moment; According to the optimized interference coefficient of each of the reference interference preprocessing signals at the previous moment from the starting moment to the current moment, the preset interference coefficient of the reference interference preprocessing signal at the current moment, and each of the reference interference preprocessing signals from the starting moment to the current moment, the preset interference coefficient of the reference interference preprocessing signal at the current moment is updated to the optimized interference coefficient, wherein the optimized interference coefficient of the reference interference preprocessing signal at the current moment can minimize the mean square value of the target micro-vibration signal at the current moment; Among them, the optimized interference coefficient of the reference interference preprocessing signal at the starting moment is obtained according to the reference interference preprocessing signal at the starting moment and the preset interference coefficient of the reference interference preprocessing signal at the starting moment, and the optimized interference coefficient of the reference interference preprocessing signal at the starting moment can minimize the mean square value of the target micro-vibration signal at the starting moment.

6. The method according to claim 5, characterized in that The step of performing interference adjustment processing on the reference interference preprocessing signal at the current moment according to the preset interference coefficient of the reference interference preprocessing signal from the starting moment to the current moment to obtain the reference interference output signal at the current moment includes: Obtaining a preset interference coefficient of the reference interference preprocessing signal at the current moment; Obtaining a reference interference intermediate signal at a current moment according to a preset interference coefficient of the reference interference preprocessing signal at a current moment and the reference interference preprocessing signal at a current moment; Obtaining an optimized interference coefficient of a reference interference preprocessing signal from a start time to a time before the current time; According to each reference interference preprocessing signal at a moment before the starting moment to the current moment and the corresponding optimized interference coefficient, a reference interference optimized intermediate signal at a moment before the starting moment to the current moment is obtained respectively; The reference interference preprocessing signal at the current moment is subjected to interference adjustment processing according to each reference interference optimization intermediate signal at the moment before the start moment to the current moment and the reference interference intermediate signal at the current moment to obtain the reference interference output signal at the current moment.

7. A micro-vibration signal measuring device, used to implement the micro-vibration signal measuring method according to any one of claims 1 to 6, characterized in that: include: Measurement path signal acquisition module, reference path signal acquisition module, preprocessing module, interference adjustment module and interference removal module; The preprocessing module is electrically connected to the measurement path signal acquisition module, the reference path signal acquisition module, the interference adjustment module and the interference removal module respectively, and the interference adjustment module is also electrically connected to the interference removal module; The reference path signal acquisition module is used to obtain the reference interference signal of the reference path optical fiber MEMS micro-vibration sensor at the current moment; The measurement path signal acquisition module is used to obtain the micro-vibration signal to be measured of the optical fiber MEMS micro-vibration sensor of the measurement path at the current moment, wherein the micro-vibration signal to be measured at the current moment includes the actual interference signal at the current moment; The preprocessing module is used to preprocess the reference interference signal at the current moment and the micro-vibration signal to be measured at the current moment respectively, to obtain the reference interference preprocessing signal at the current moment and the micro-vibration preprocessing signal to be measured at the current moment; The interference adjustment module is used to perform interference adjustment processing on the reference interference preprocessing signal at the current moment according to the preset interference coefficient of the reference interference preprocessing signal from the starting moment to the current moment, so as to obtain the reference interference output signal at the current moment, wherein the starting moment refers to the starting moment of the preset sampling period in which the current moment is located; The interference removal module is used to perform interference removal processing on the micro-vibration pre-processed signal to be measured at the current moment according to the reference interference output signal at the current moment, to obtain the target micro-vibration signal at the current moment, the target micro-vibration signal at the current moment includes the target interference signal at the current moment, the target interference signal at the current moment is smaller than the actual interference signal at the current moment and meets a preset accuracy threshold.

8. The micro-vibration signal measuring device according to claim 7, characterized in that: Also included is a disturbance regulation optimization module; The interference adjustment and optimization module is electrically connected to the interference adjustment module and the interference removal module respectively; The interference adjustment optimization module is used to update the preset interference coefficient of the reference interference preprocessing signal at the current moment to the optimized interference coefficient according to the reference interference preprocessing signal from the starting moment to the current moment and the target micro-vibration signal at the current moment.

9. A computer device, characterized in that: The computer device includes a processor and a memory, wherein the memory is used to store computer instructions, and the computer instructions are loaded and executed by the processor to implement the micro-vibration signal measurement method according to any one of claims 1 to 6.

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