Method and system for controlling an accelerometer in a high temperature environment

Abstract

The application discloses a kind of accelerometer control method and system under high temperature environment, according to the positioning signal triggering accelerometer positioning detection;Based on the positioning detection of accelerometer, the multiple environmental parameters of the position where accelerometer is located are collected;According to multiple environmental parameters definition high temperature environment, and match corresponding test mode, so as to ensure the accurate test of accelerometer in high temperature environment.In the test mode, according to temperature influence factor, vibration frequency, first sensitivity, influence relationship and second sensitivity trigger accelerometer multidimensional test under high temperature environment, so as to carry out multidimensional test based on accelerometer, and the overall consideration of temperature influence factor, vibration frequency, first sensitivity, influence relationship and second sensitivity is compatible, realizes the multidimensional control of temperature influence factor, vibration frequency, first sensitivity, influence relationship and second sensitivity.

Description

Technical Field

[0001] This invention relates to the technical field of accelerometers, and more particularly to a control method and system for accelerometers in high-temperature environments. Background Technology

[0002] With the development of technology, accelerometers are increasingly applied in people's lives and are deeply utilized in various fields. Accelerometers play a crucial role in key areas such as inertial navigation, the oil and gas industry, and structural health monitoring. In inertial navigation systems, precise position and attitude information can be obtained by measuring the acceleration and angular acceleration of the carrier. In the oil and gas industry, especially in downhole logging, accelerometers are used to determine changes in lateral displacement and to demonstrate ground motion displacement by measuring tilt. Furthermore, accelerometers are widely used to detect equipment faults and to provide early warnings by monitoring the frequency components of structures such as gas turbines, rotating blades, and electric motors. However, accelerometers are used in high-temperature environments. Current technologies still present challenges in measuring accelerometers in high-temperature environments, limiting their application in extreme conditions and hindering accurate testing in such environments. Summary of the Invention

[0003] The purpose of this invention is to overcome the shortcomings of the prior art. This invention provides a control method and system for an accelerometer in a high-temperature environment. The invention discloses a control method and system for an accelerometer in a high-temperature environment, which involves acquiring the positioning signal of the accelerometer and triggering the positioning detection of the accelerometer based on the positioning signal; acquiring multiple environmental parameters of the accelerometer's location based on the positioning detection of the accelerometer; defining a high-temperature environment based on the multiple environmental parameters and matching the corresponding test method, thereby ensuring accurate testing of the accelerometer in a high-temperature environment.

[0004] In this testing method, multiple curvatures of the accelerometer under different dimensions are collected, and reflection spectra are acquired under multiple curvature tests. The intensity change of the accelerometer is defined based on the identification of the reflection spectrum. The wavelength change of the accelerometer under different temperatures is collected, and the corresponding temperature influencing factors are defined. Vibration waves of different frequencies and accelerations are applied to the accelerometer, and the vibration frequency is defined based on the time-domain response signal of the cladding mode. Multi-dimensional testing of the accelerometer under high-temperature environment is triggered according to the temperature influencing factors, vibration frequency, first sensitivity, influence relationship, and second sensitivity. This facilitates multi-dimensional testing based on the accelerometer and is compatible with the overall consideration of temperature influencing factors, vibration frequency, first sensitivity, influence relationship, and second sensitivity, achieving multi-dimensional control of temperature influencing factors, vibration frequency, first sensitivity, influence relationship, and second sensitivity.

[0005] This invention provides a control method for an accelerometer in a high-temperature environment, applicable to control scenarios of accelerometers in high-temperature environments;

[0006] The control method for the accelerometer in a high-temperature environment includes:

[0007] Acquire the positioning signal from the accelerometer and trigger the positioning detection of the accelerometer based on the positioning signal;

[0008] Multiple environmental parameters of the accelerometer's location are collected based on the accelerometer's positioning detection.

[0009] A high-temperature environment is defined based on multiple environmental parameters, and the corresponding test methods are matched accordingly;

[0010] In this testing method, multiple curvatures of the accelerometer in different dimensions are collected, and the reflection spectrum is collected under the test of multiple curvatures. The intensity change of the accelerometer is defined based on the identification of the reflection spectrum.

[0011] The wavelength changes of the accelerometer at different temperatures are collected, and the corresponding temperature influencing factors are defined. Vibration waves of different frequencies and accelerations are applied to the accelerometer, and the vibration frequency is defined based on the time-domain response signal of the cladding mode.

[0012] The system collects data on temperature influencing factors, vibration frequency, primary sensitivity, influencing relationships, and secondary sensitivity. Based on these data, the system triggers multi-dimensional testing of the accelerometer under high-temperature conditions.

[0013] Optionally, the step of acquiring the positioning signal from the accelerometer and triggering the positioning detection of the accelerometer based on the positioning signal includes:

[0014] Acquire positioning signals from the accelerometer;

[0015] The positioning information of the accelerometer is defined based on the analysis of the positioning signal from the accelerometer.

[0016] The accelerometer is located based on its positioning information;

[0017] When the accelerometer is in a positioning state, the control space of the accelerometer is acquired based on the accelerometer's response;

[0018] The accelerometer's positioning detection is triggered based on the control space, positioning signal, and detection signal of the accelerometer.

[0019] Optionally, the acquisition of multiple environmental parameters at the location of the accelerometer based on the accelerometer's positioning detection includes:

[0020] Real-time monitoring of accelerometer positioning detection;

[0021] In the positioning and detection of accelerometers, the location of the accelerometer is collected;

[0022] The scene space is defined based on the location of the accelerometer;

[0023] Define the corresponding set of environmental parameters for each scene space;

[0024] Associate multiple sets of environmental parameters;

[0025] Multiple environmental parameters are matched based on multiple sets of environmental parameters, and multiple environmental parameters at the location of the accelerometer are collected.

[0026] Optionally, defining a high-temperature environment based on multiple environmental parameters and matching the corresponding test methods includes:

[0027] Multiple environmental parameters at the location of the stationary accelerometer;

[0028] The corresponding high-temperature environment is defined based on multiple environmental parameters at the location of the accelerometer;

[0029] The corresponding temperature range is defined based on the analysis of the high-temperature environment;

[0030] The corresponding high-temperature rating is defined based on this temperature range;

[0031] The model of the associated accelerometer and its corresponding high-temperature rating;

[0032] The appropriate testing method is matched based on the accelerometer model and its corresponding high temperature rating.

[0033] Optionally, in this testing method, the accelerometer is sampled at multiple curvatures in different dimensions, and a reflection spectrum is collected under the test of multiple curvatures. The intensity change of the accelerometer is defined based on the identification of the reflection spectrum, including:

[0034] In this testing method, multiple bending curvatures of the accelerometer in different dimensions are collected;

[0035] Tests are triggered based on multiple bending curvatures;

[0036] Reflectance spectra were collected under tests with multiple curvatures, and the total reflection spectrum and local reflection spectrum were divided based on the reflection spectrum.

[0037] The intensity change of the accelerometer is defined based on the overall identification of the total reflection spectrum and the local reflection spectrum, which are correlated.

[0038] Optionally, the acquisition of wavelength changes of the accelerometer at different temperatures and the definition of corresponding temperature influencing factors, the application of vibration waves of different frequencies and accelerations to the accelerometer, and the definition of vibration frequencies based on the time-domain response signal of the cladding mode, including:

[0039] The wavelength changes of the accelerometer at different temperatures were collected;

[0040] The corresponding temperature influencing factors are defined based on this wavelength change;

[0041] Temperature sensitivity is defined based on the factors affecting temperature, the accelerometer, and the corresponding temperature.

[0042] Optionally, the step of acquiring the wavelength changes of the accelerometer at different temperatures and defining corresponding temperature influencing factors, applying vibration waves of different frequencies and accelerations to the accelerometer, and defining the vibration frequency based on the time-domain response signal of the cladding mode, further includes:

[0043] The accelerometer and each vibration wave are correlated, and at this time, each vibration wave is at a different frequency and acceleration;

[0044] The time-domain response signal of the cladding mode is acquired based on accelerometer and multi-dimensional testing of various vibration waves;

[0045] The vibration frequency is defined based on the time-domain response signal of the cladding mode.

[0046] Optionally, the acquisition of temperature influencing factors, vibration frequency, first sensitivity, influencing relationship, and second sensitivity, and the triggering of multi-dimensional testing of the accelerometer in a high-temperature environment based on these factors, include:

[0047] Test the output voltage variation of the accelerometer in cladding mode under different accelerations;

[0048] The first sensitivity is calculated based on the change in output voltage;

[0049] The amplitude-frequency response of the accelerometer was triggered at different free fiber lengths to determine the influence of the output length on the response sensitivity and resonant frequency.

[0050] The second sensitivity of the accelerometer was collected under high temperature conditions.

[0051] Optionally, the step of collecting temperature influencing factors, vibration frequency, first sensitivity, influencing relationship, and second sensitivity, and triggering multi-dimensional testing of the accelerometer in a high-temperature environment based on these factors, further includes:

[0052] Related temperature influencing factors, vibration frequency, primary sensitivity, influencing relationship, and secondary sensitivity;

[0053] Multi-dimensional testing of accelerometers under high-temperature environments is conducted based on factors influencing temperature, vibration frequency, primary sensitivity, influencing relationships, and secondary sensitivity.

[0054] In addition, embodiments of the present invention also provide a control system for an accelerometer in a high-temperature environment, the control system for the accelerometer in a high-temperature environment comprising:

[0055] The acquisition module is used to acquire the positioning signal of the accelerometer and trigger the positioning detection of the accelerometer based on the positioning signal;

[0056] The environmental parameter module is used to collect multiple environmental parameters of the accelerometer's location based on the accelerometer's positioning detection.

[0057] The high-temperature testing module is used to define a high-temperature environment based on multiple environmental parameters and match the corresponding testing methods.

[0058] The intensity change module is used to collect multiple bending curvatures of the accelerometer in different dimensions in this test mode, and to collect the reflection spectrum under the test of multiple bending curvatures, and to define the intensity change of the accelerometer based on the identification of the reflection spectrum;

[0059] The vibration frequency module is used to collect the wavelength changes of the accelerometer at different temperatures and define the corresponding temperature influencing factors. Vibration waves of different frequencies and accelerations are applied to the accelerometer, and the vibration frequency is defined based on the time-domain response signal of the cladding mode.

[0060] The multi-dimensional testing module is used to collect data on temperature influencing factors, vibration frequency, primary sensitivity, influencing relationship, and secondary sensitivity. Based on these data, the accelerometer is triggered to perform multi-dimensional testing under high-temperature conditions.

[0061] In this embodiment of the invention, the method of this embodiment is used to collect the positioning signal of the accelerometer and trigger the positioning detection of the accelerometer based on the positioning signal; multiple environmental parameters of the location of the accelerometer are collected based on the positioning detection of the accelerometer; a high-temperature environment is defined according to the multiple environmental parameters and a corresponding test method is matched, thereby ensuring the accurate testing of the accelerometer in the high-temperature environment.

[0062] In this testing method, multiple curvatures of the accelerometer under different dimensions are collected, and reflection spectra are acquired under multiple curvature tests. The intensity change of the accelerometer is defined based on the identification of the reflection spectrum. The wavelength change of the accelerometer under different temperatures is collected, and corresponding temperature influencing factors are defined. Vibration waves of different frequencies and accelerations are applied to the accelerometer, and the vibration frequency is defined based on the time-domain response signal of the cladding mode. Temperature influencing factors, vibration frequency, first sensitivity, influence relationship, and second sensitivity are collected. Multi-dimensional testing of the accelerometer under high-temperature environment is triggered based on temperature influencing factors, vibration frequency, first sensitivity, influence relationship, and second sensitivity to facilitate multi-dimensional testing based on the accelerometer. It also considers the overall factors of temperature influencing factors, vibration frequency, first sensitivity, influence relationship, and second sensitivity, and achieves multi-dimensional control of temperature influencing factors, vibration frequency, first sensitivity, influence relationship, and second sensitivity. Attached Figure Description

[0063] To more clearly illustrate the technical solutions in the embodiments of the present invention or the prior art, the drawings used in the description of the embodiments or the prior art will be briefly introduced below. Obviously, the drawings described below are only some embodiments of the present invention. For those skilled in the art, other drawings can be obtained based on these drawings without creative effort.

[0064] Figure 1 This is a flowchart illustrating the control method of the accelerometer in a high-temperature environment according to an embodiment of the present invention;

[0065] Figure 2 This is a flowchart illustrating step S11 of the control method for an accelerometer in a high-temperature environment according to an embodiment of the present invention.

[0066] Figure 3 This is a flowchart illustrating step S12 of the control method for an accelerometer in a high-temperature environment according to an embodiment of the present invention.

[0067] Figure 4 This is a flowchart illustrating step S13 of the control method for an accelerometer in a high-temperature environment according to an embodiment of the present invention.

[0068] Figure 5 This is a flowchart illustrating step S14 of the control method for an accelerometer in a high-temperature environment according to an embodiment of the present invention.

[0069] Figure 6 This is a flowchart illustrating step S15 of the control method for an accelerometer in a high-temperature environment according to an embodiment of the present invention.

[0070] Figure 7This is a flowchart illustrating step S16 of the control method for an accelerometer in a high-temperature environment according to an embodiment of the present invention.

[0071] Figure 8 This is a schematic diagram of the structural composition of the control system for the accelerometer in a high-temperature environment according to an embodiment of the present invention;

[0072] Figure 9 This is a hardware diagram of an electronic device according to an exemplary embodiment. Detailed Implementation

[0073] The technical solutions of the embodiments of the present invention will be clearly and completely described below with reference to the accompanying drawings. Obviously, the described embodiments are only one part of the embodiments of the present invention, and not all of the embodiments. Based on the embodiments of the present invention, all other embodiments obtained by those of ordinary skill in the art without creative effort are within the scope of protection of the present invention.

[0074] Please see Figures 1 to 9 A control method for an accelerometer in a high-temperature environment, applied to control scenarios of accelerometers in high-temperature environments; the control method for an accelerometer in a high-temperature environment includes:

[0075] Step S11: Acquire the positioning signal from the accelerometer and trigger the positioning detection of the accelerometer based on the positioning signal;

[0076] Step S12: Collect multiple environmental parameters of the accelerometer's location based on the accelerometer's positioning detection;

[0077] Step S13: Define a high-temperature environment based on multiple environmental parameters and match the corresponding test methods;

[0078] Step S14: In this test method, multiple curvatures of the accelerometer in different dimensions are collected, and the reflection spectrum is collected under the test of multiple curvatures. The intensity change of the accelerometer is defined based on the identification of the reflection spectrum.

[0079] Step S15: Collect the wavelength changes of the accelerometer at different temperatures and define the corresponding temperature influencing factors. Apply vibration waves of different frequencies and accelerations to the accelerometer and define the vibration frequency based on the time-domain response signal of the cladding mode.

[0080] Step S16: Collect temperature influencing factors, vibration frequency, first sensitivity, influencing relationship and second sensitivity, and trigger multi-dimensional testing of the accelerometer in high temperature environment based on temperature influencing factors, vibration frequency, first sensitivity, influencing relationship and second sensitivity.

[0081] In this embodiment of the invention, the present invention discloses a control method and system for an accelerometer in a high-temperature environment. The method involves acquiring the positioning signal of the accelerometer and triggering the positioning detection of the accelerometer based on the positioning signal; acquiring multiple environmental parameters of the location of the accelerometer based on the positioning detection of the accelerometer; defining a high-temperature environment based on the multiple environmental parameters and matching the corresponding test method, thereby ensuring accurate testing of the accelerometer in a high-temperature environment.

[0082] In this testing method, multiple curvatures of the accelerometer under different dimensions are collected, and reflection spectra are acquired under multiple curvature tests. The intensity change of the accelerometer is defined based on the identification of the reflection spectrum. The wavelength change of the accelerometer under different temperatures is collected, and the corresponding temperature influencing factors are defined. Vibration waves of different frequencies and accelerations are applied to the accelerometer, and the vibration frequency is defined based on the time-domain response signal of the cladding mode. Multi-dimensional testing of the accelerometer under high-temperature environment is triggered according to the temperature influencing factors, vibration frequency, first sensitivity, influence relationship, and second sensitivity. This facilitates multi-dimensional testing based on the accelerometer and is compatible with the overall consideration of temperature influencing factors, vibration frequency, first sensitivity, influence relationship, and second sensitivity, achieving multi-dimensional control of temperature influencing factors, vibration frequency, first sensitivity, influence relationship, and second sensitivity.

[0083] refer to Figure 2 In step S11, the positioning signal of the accelerometer is acquired, and the positioning detection of the accelerometer is triggered according to the positioning signal;

[0084] In the specific implementation of this invention, the specific steps can be as follows:

[0085] S111: Acquire the positioning signal from the accelerometer;

[0086] S112: Define the accelerometer's positioning information based on the analysis of the accelerometer's positioning signal;

[0087] S113: Locate the accelerometer based on its positioning information;

[0088] S114: When the accelerometer is in the positioning state, the control space of the accelerometer is acquired based on the response of the accelerometer;

[0089] S115: The accelerometer's positioning detection is triggered based on the accelerometer's control space, positioning signal, and detection signal.

[0090] In the embodiments of this application, the positioning signal of the accelerometer is acquired and introduced. This positioning signal is then further controlled, and the positioning information of the accelerometer is defined based on the parsing of the positioning signal. This positioning information is then output to facilitate further control over the accelerometer's positioning information. Optionally, the positioning signal of the accelerometer is a signal used to locate the accelerometer.

[0091] Therefore, the accelerometer is located based on its positioning information, and positioning control is performed on the accelerometer. When the accelerometer is in the positioning state, its control space is acquired based on its response. Positioning detection of the accelerometer is triggered based on its control space, positioning signal, and detection signal. This approach introduces the accelerometer's control space, positioning signal, and detection signal, providing multi-dimensional control and comprehensive consideration of these factors to ensure accurate positioning detection. Optionally, the accelerometer's control space refers to the core control space built into the accelerometer. The detection signal is the signal used to detect the accelerometer.

[0092] refer to Figure 3 In step S12, multiple environmental parameters of the accelerometer's location are collected based on the accelerometer's positioning detection.

[0093] In the specific implementation of this invention, the specific steps can be as follows:

[0094] S121: Real-time monitoring of accelerometer positioning detection;

[0095] S122: In the positioning detection of the accelerometer, the location of the accelerometer is collected;

[0096] S123: Define the corresponding scene space based on the location of the accelerometer;

[0097] S124: Define the corresponding set of environmental parameters for each scene space;

[0098] S125: Associates multiple sets of environmental parameters;

[0099] S126: Match multiple environmental parameters based on multiple sets of environmental parameters, and collect multiple environmental parameters at the location of the accelerometer.

[0100] In the embodiments of this application, the positioning detection of the accelerometer is monitored in real time to facilitate real-time control of the positioning detection of the accelerometer. At this time, in the positioning detection of the accelerometer, the location of the accelerometer is collected, the location of the accelerometer is introduced, and the corresponding scene space is defined based on the location of the accelerometer, thereby controlling the scene space and realizing further management of the scene space.

[0101] Therefore, a set of corresponding environmental parameters is defined according to each scene space; multiple environmental parameter sets are associated; multiple environmental parameters are matched based on multiple environmental parameter sets, and multiple environmental parameters at the location of the accelerometer are collected, introducing multiple environmental parameters at the location of the accelerometer, and further processing is performed based on these multiple environmental parameters at the location of the accelerometer. Optionally, environmental parameters are used as a schematic form of environment representation, presenting the environment as parameters.

[0102] refer to Figure 4 In step S13, a high-temperature environment is defined based on multiple environmental parameters, and the corresponding test method is matched.

[0103] In the specific implementation of this invention, the specific steps can be as follows:

[0104] S131: Multiple environmental parameters at the location of the stationary accelerometer;

[0105] S132: Define the corresponding high-temperature environment based on multiple environmental parameters at the location of the accelerometer;

[0106] S133: Define the corresponding temperature range based on the analysis of high-temperature environments;

[0107] S134: Define the corresponding high temperature level based on this temperature range;

[0108] S135: The model number of the associated accelerometer and its corresponding high temperature rating;

[0109] S136: The test method is matched based on the accelerometer model and the corresponding high temperature rating.

[0110] In the embodiments of this application, the positioning signal of the accelerometer is collected, and the positioning detection of the accelerometer is triggered according to the positioning signal; multiple environmental parameters of the location of the accelerometer are collected based on the positioning detection of the accelerometer; a high-temperature environment is defined according to the multiple environmental parameters, and a corresponding test method is matched, thereby ensuring the accurate testing of the accelerometer in the high-temperature environment.

[0111] At this point, multiple environmental parameters at the location of the accelerometer are fixed, and a corresponding high-temperature environment is defined based on these parameters. This high-temperature environment is introduced, and a corresponding temperature range is defined based on the analysis of the high-temperature environment, thus achieving temperature range control.

[0112] Therefore, a corresponding high-temperature rating is defined based on this temperature range; the accelerometer model and its corresponding high-temperature rating are associated; and the corresponding test method is matched based on the accelerometer model and its corresponding high-temperature rating, ensuring the adaptability of the test method.

[0113] refer to Figure 5 S14: In this test method, multiple bending curvatures of the accelerometer in different dimensions are collected, and the reflection spectrum is collected under the test of multiple bending curvatures. The intensity change of the accelerometer is defined based on the identification of the reflection spectrum.

[0114] In the specific implementation of this invention, the specific steps can be as follows:

[0115] S141: In this test method, the accelerometer collects multiple bending curvatures in different dimensions;

[0116] S142: Tests triggered by multiple bending curvatures;

[0117] S143: Reflection spectra are collected under tests of multiple curvatures, and total reflection spectra and local reflection spectra are divided based on the reflection spectra;

[0118] S144: Associate total reflection spectrum and local reflection spectrum, and define the intensity change of accelerometer based on the overall identification of total reflection spectrum and local reflection spectrum.

[0119] In the embodiments of this application, in this testing method, multiple bending curvatures of the accelerometer in different dimensions are collected; corresponding tests are triggered based on multiple bending curvatures, so as to introduce multiple bending curvatures and perform adaptation tests on multiple bending curvatures.

[0120] Therefore, reflection spectra are collected under tests of multiple curvatures, and total reflection spectra and local reflection spectra are divided based on the reflection spectra. The total reflection spectra and local reflection spectra are correlated, and the intensity change of the accelerometer is defined based on the overall identification of the total reflection spectra and local reflection spectra, thereby realizing the control of the intensity change of the accelerometer.

[0121] refer to Figure 6 S15: Collect the wavelength changes of the accelerometer at different temperatures, define the corresponding temperature influencing factors, apply vibration waves of different frequencies and accelerations to the accelerometer, and define the vibration frequency based on the time-domain response signal of the cladding mode;

[0122] In the specific implementation of this invention, the specific steps can be as follows:

[0123] S151: Collect the wavelength changes of the accelerometer at different temperatures;

[0124] S152: Define the corresponding temperature influencing factors based on this wavelength change;

[0125] S153: Temperature sensitivity is defined based on temperature-influencing factors, accelerometer, and corresponding temperature.

[0126] S154: Correlate the accelerometer and each vibration wave, where each vibration wave is at a different frequency and acceleration;

[0127] S155: Acquires time-domain response signals of cladding modes based on accelerometer and multi-dimensional testing of various vibration waves;

[0128] S156: The vibration frequency is defined by the time-domain response signal based on the cladding mode.

[0129] In the embodiments of this application, the wavelength change of the accelerometer at different temperatures is collected, the wavelength change is introduced, and the corresponding temperature influencing factors are defined based on the wavelength change, so as to control the temperature influencing factors.

[0130] At this point, based on the temperature influencing factors, the accelerometer, and the corresponding temperature definition, the temperature sensitivity is determined, and the accelerometer and each vibration wave are correlated. At this point, each vibration wave is at a different frequency and acceleration.

[0131] Therefore, the time-domain response signal of the cladding mode is acquired based on the accelerometer and multi-dimensional testing of various vibration waves; the vibration frequency is defined based on the time-domain response signal of the cladding mode, the vibration frequency is introduced, and the vibration frequency is controlled in multiple dimensions.

[0132] refer to Figure 7 S16: Collect temperature influencing factors, vibration frequency, first sensitivity, influencing relationship and second sensitivity, and trigger multi-dimensional testing of accelerometer in high temperature environment based on temperature influencing factors, vibration frequency, first sensitivity, influencing relationship and second sensitivity;

[0133] In the specific implementation of this invention, the specific steps can be as follows:

[0134] S161: The vibration frequency is defined by the time-domain response signal based on the cladding mode;

[0135] S162: Calculate the corresponding first sensitivity based on the output voltage change;

[0136] S163: Trigger the amplitude-frequency response of the accelerometer at different free fiber lengths, and output the relationship between the length and the response sensitivity and resonant frequency.

[0137] S164: Acquire the second sensitivity of the accelerometer under high temperature conditions;

[0138] S165: Corresponding temperature influencing factors, vibration frequency, primary sensitivity, influencing relationship, and secondary sensitivity;

[0139] S166: Multi-dimensional testing of accelerometers in high-temperature environments based on temperature influencing factors, vibration frequency, primary sensitivity, influencing relationships, and secondary sensitivity.

[0140] In the specific implementation of this invention, in this testing method, multiple curvatures of the accelerometer under different dimensions are collected, and reflection spectra are collected under the test of multiple curvatures. The intensity change of the accelerometer is defined based on the identification of the reflection spectrum. The wavelength change of the accelerometer under different temperatures is collected, and the corresponding temperature influencing factors are defined. Vibration waves of different frequencies and accelerations are applied to the accelerometer, and the vibration frequency is defined based on the time-domain response signal of the cladding mode. Multi-dimensional testing of the accelerometer under high temperature environment is triggered according to the temperature influencing factors, vibration frequency, first sensitivity, influence relationship, and second sensitivity, so as to facilitate multi-dimensional testing based on the accelerometer and to accommodate the overall consideration of temperature influencing factors, vibration frequency, first sensitivity, influence relationship, and second sensitivity, thereby realizing multi-dimensional control of temperature influencing factors, vibration frequency, first sensitivity, influence relationship, and second sensitivity.

[0141] At this point, the vibration frequency is defined by the time-domain response signal based on the cladding mode; the corresponding first sensitivity is calculated based on the output voltage change, and the first sensitivity is introduced to realize the control of the first sensitivity under the output voltage change.

[0142] Furthermore, the amplitude-frequency response of the accelerometer is triggered under different free fiber lengths to output the influence of length on response sensitivity and resonant frequency. Simultaneously, the secondary sensitivity of the accelerometer under high-temperature conditions is collected. Temperature influencing factors, vibration frequency, primary sensitivity, influence relationship, and secondary sensitivity are correlated. Based on temperature influencing factors, vibration frequency, primary sensitivity, influence relationship, and secondary sensitivity, multi-dimensional testing of the accelerometer under high-temperature conditions is triggered, and the overall consideration of temperature influencing factors, vibration frequency, primary sensitivity, influence relationship, and secondary sensitivity is taken into account, realizing multi-dimensional control of temperature influencing factors, vibration frequency, primary sensitivity, influence relationship, and secondary sensitivity.

[0143] In a specific embodiment of the present invention

[0144] This invention provides a control method and system for an accelerometer operating in high-temperature environments. Through innovative design, it achieves accurate measurement of vibration direction under high-temperature conditions. The accelerometer includes an eccentric fiber Bragg grating, a nickel-coated fiber end face, a frequency-modulated continuous wave laser source, a signal acquisition and processing system, and a host computer display system.

[0145] A laser beam emitted from a laser source passes through an off-core fiber Bragg grating, forming a single-ended reflection signal. Due to the highly localized characteristics and asymmetric refractive index modulation of the fiber Bragg grating, different vibration directions induce different cladding mode coupling effects.

[0146] The signal acquisition and processing system collects and processes the reflected signals, analyzes the data to derive the direction and magnitude of the vibration, and outputs the measurement results through a host computer display system. This sensor, through a unique fiber optic structure design, achieves direction-correlated vibration measurement in high-temperature environments, solving the technical problem of limited performance of existing accelerometers in high-temperature, strong electromagnetic interference, and harsh corrosive environments. Its main components include the following:

[0147] 1. Off-core fiber Bragg grating element:

[0148] A fiber Bragg grating (FBG) with a length of 10 mm and an off-core of 2 μm was etched into the fiber using single-mode fiber (SMF) as the grating carrier.

[0149] This fiber Bragg grating has asymmetric refractive index modulation characteristics, which causes the coupling effect of the cladding mode to change under vibration, thereby enhancing the ability to identify the vibration direction.

[0150] 2. Nickel-coated fiber end face: A nickel film approximately 30 nm thick is coated onto the split fiber end face of the fiber Bragg grating using magnetron sputtering technology to form a single-end reflective sensing element. The nickel film serves to increase the reflectivity of the fiber end face under high-temperature conditions and protect the fiber from the effects of high temperatures, ensuring the stability of the sensor.

[0151] 3. Light Source and Detection System: After the grating is fabricated and coated, the FBG sensing element is installed in the vibration measurement system. The system emits a laser beam from a laser source, which generates a reflected signal through the fiber Bragg grating. The signal acquisition and processing system collects and processes the reflected signal, analyzes the data to derive the direction and magnitude of the vibration, and outputs the measurement results through a host computer display system. Ultimately, this sensor can achieve high-precision and stable temperature or vibration measurement in high-temperature environments, and its compact and robust structure makes it suitable for monitoring applications in various harsh environments.

[0152] For eccentric fiber Bragg grating elements:

[0153] Fiber selection: Standard single-mode fiber (SMF) is used, and fiber Bragg gratings are inscribed in the fiber to form a highly localized grating structure.

[0154] Writing technique: Femtosecond laser PbP (Point-by-Point) technology was used for writing fiber Bragg gratings. A frequency-doubled regenerative amplified femtosecond laser (Pharos, optical converter) was used, with a center wavelength of 514 nm, a pulse width of 290 fs, and a repetition rate of 200 kHz. Laser focusing and positioning were achieved using a Leica 100× / 1.25 oil immersion microscope objective and a three-dimensional air bearing translation stage (Aerotech ABL15010, ANT130LZS, and ANT130V-5).

[0155] Grating writing: A fiber Bragg grating with a writing period of 1.07 μm and a total length of 4 mm was used to achieve high-precision localization effects. This fiber Bragg grating achieved a cladding mode intensity of over 20 dB over a wide wavelength range of 1310 nm to 1549 nm.

[0156] Cross-sectional image acquisition: To obtain the cross-sectional image of the FBG, the FBG was first laterally cut in the grating region using a fiber optic cleaver (Sumitomo, FC-6S). After inputting a light source at the other end of the fiber, the cross-sectional image of the fiber core was observed using a Leica DM2700MH microscope. Due to the asymmetry and non-uniform edges of the fiber grating, coupling occurs between the core mode and the cladding mode. Simultaneously, the asymmetric rim breaks the cylindrical symmetry of the fiber, thus providing a mechanism for identifying vibration direction information.

[0157] For the end face of an optical fiber coated with nickel film:

[0158] Cleaning process: The split end face of the fiber Bragg grating is cleaned to ensure that the surface is free of dust and impurities, so as to ensure uniform nickel film coating.

[0159] Coating technology: A magnetron sputtering system was used to place the nickel material on a rotating stage to ensure uniform thickness of the sample during the coating process. The uniformity and thickness of the nickel film have a significant impact on reflectivity, requiring strict control of sputtering process parameters. For example, the sputtering power (40mW) and time (15min) were controlled to precisely control the nickel film thickness to 30nm. The FBG reflectance spectrum after coating showed a significant enhancement of the Bragg resonance peak of the core mode at 1549.46nm, and the resonance intensity of the cladding mode was also significantly improved.

[0160] Verification of reflectivity: The Bragg resonance peak of the core mode in the reflectivity spectrum of the nickel-plated FBG was significantly enhanced at 1549.46 nm, while the resonance intensity of the cladding mode was also significantly improved. The high reflectivity (>90%) of the nickel film ensures that the single-ended reflective accelerometer does not require complex structures such as fiber thinning, offset splicing, and core mismatch, simplifying the sensor design and improving its mechanical strength and reliability. Figure 2The reflection spectrum of the accelerometer based on a highly localized fiber Bragg grating (FBG) of this invention is shown. The figure mainly illustrates the following characteristics: A significantly enhanced Bragg resonance peak in the core mode appears at a wavelength of 1549.46 nm, indicating the high writing accuracy and localization effect of the fiber Bragg grating. Improved cladding mode intensity: The resonance intensity of the cladding mode is significantly enhanced, demonstrating that the nickel-coated fiber Bragg grating still possesses good reflectivity under high-temperature conditions, ensuring the sensor can operate normally in complex environments.

[0161] For light sources and detection systems:

[0162] Light source configuration: A frequency-modulated continuous-wave laser emits broadband light, which is reflected by a fiber Bragg grating. The frequency modulation range and modulation depth of the light source are optimized based on the reflection spectrum characteristics of the fiber Bragg grating.

[0163] Detection system: The system uses a high-sensitivity photodetector and a high-precision analog-to-digital converter to acquire signals, and performs real-time analysis through a data processing system to output information on the direction and magnitude of vibrations.

[0164] Therefore, the present invention solves the problems in the prior art through the following technical means and methods:

[0165] Highly localized fiber Bragg grating design:

[0166] Fiber Bragg gratings are inscribed within single-mode optical fibers. Their grating structure exhibits eccentricity, meaning there is a 2 μm offset between the central axis of the fiber and the optical axis of the fiber grating. This eccentricity makes the optical field distribution within the fiber more asymmetrical, thereby enhancing the coupling effect of the cladding modes. The length of the fiber Bragg grating is controlled within 10 mm to achieve a high degree of localization, significantly improving its sensitivity to vibration under high-temperature conditions.

[0167] Cladding mode coupling and orientation correlation measurements:

[0168] When vibration occurs, the strain of the fiber Bragg grating causes changes in its reflection spectrum. Due to the asymmetric refractive index modulation characteristics of the fiber Bragg grating, different vibration directions induce different coupling situations in the cladding modes. This causes changes in the peak position and intensity of the cladding modes in the reflected signal. By analyzing these changes, the detection system can accurately identify the direction and magnitude of the vibration.

[0169] Performance guarantee under high temperature conditions:

[0170] By coating the fiber end face with a nickel film, the sensing element of this invention can maintain good reflectivity even in high-temperature environments. The nickel film not only has excellent thermal stability, capable of withstanding temperatures up to 600°C, but also possesses antioxidant and corrosion-resistant properties, protecting the fiber end face from external environmental influences and thus ensuring long-term stable operation of the sensor in high-temperature environments.

[0171] System integration and data processing:

[0172] The laser, acting as a light source, emits light that passes through a fiber Bragg grating, generating a reflected signal. This reflected signal is received by the detection system and converted into an electrical signal. The data processing system processes this electrical signal, analyzing the cladding mode coupling using algorithms such as Fast Fourier Transform (FFT), and ultimately outputs information on the direction and magnitude of the vibrations. This processing can be performed in real time and possesses high sensitivity and accuracy.

[0173] In this embodiment of the invention, the present invention discloses a control method and system for an accelerometer in a high-temperature environment. The method involves acquiring the positioning signal of the accelerometer and triggering the positioning detection of the accelerometer based on the positioning signal; acquiring multiple environmental parameters of the location of the accelerometer based on the positioning detection of the accelerometer; defining a high-temperature environment based on the multiple environmental parameters and matching the corresponding test method, thereby ensuring accurate testing of the accelerometer in a high-temperature environment.

[0174] In this testing method, multiple curvatures of the accelerometer under different dimensions are collected, and reflection spectra are acquired under multiple curvature tests. The intensity change of the accelerometer is defined based on the identification of the reflection spectrum. The wavelength change of the accelerometer under different temperatures is collected, and the corresponding temperature influencing factors are defined. Vibration waves of different frequencies and accelerations are applied to the accelerometer, and the vibration frequency is defined based on the time-domain response signal of the cladding mode. Multi-dimensional testing of the accelerometer under high-temperature environment is triggered according to the temperature influencing factors, vibration frequency, first sensitivity, influence relationship, and second sensitivity. This facilitates multi-dimensional testing based on the accelerometer and is compatible with the overall consideration of temperature influencing factors, vibration frequency, first sensitivity, influence relationship, and second sensitivity, achieving multi-dimensional control of temperature influencing factors, vibration frequency, first sensitivity, influence relationship, and second sensitivity.

[0175] Please see Figure 8 , Figure 8 This is a schematic diagram of the structural composition of the control system for the accelerometer in a high-temperature environment according to an embodiment of the present invention.

[0176] like Figure 8 As shown, a control system for an accelerometer operating in a high-temperature environment includes:

[0177] The acquisition module 21 is used to acquire the positioning signal of the accelerometer and trigger the positioning detection of the accelerometer based on the positioning signal;

[0178] The environmental parameter module 22 is used to collect multiple environmental parameters of the accelerometer's location based on the accelerometer's positioning detection;

[0179] The high-temperature testing module 23 is used to define a high-temperature environment based on multiple environmental parameters and match the corresponding testing methods.

[0180] The intensity change module 24 is used to collect multiple bending curvatures of the accelerometer in different dimensions in this test mode, and to collect the reflection spectrum under the test of multiple bending curvatures, and to define the intensity change of the accelerometer based on the identification of the reflection spectrum;

[0181] The vibration frequency module 25 is used to collect the wavelength changes of the accelerometer at different temperatures and define the corresponding temperature influencing factors. It applies vibration waves of different frequencies and accelerations to the accelerometer and defines the vibration frequency based on the time-domain response signal of the cladding mode.

[0182] The multi-dimensional testing module 26 is used to collect data on temperature influencing factors, vibration frequency, first sensitivity, influence relationship, and second sensitivity. Based on these data, the accelerometer is triggered to perform multi-dimensional testing under high-temperature conditions.

[0183] Please see Figure 9 See below for reference. Figure 9 To describe an electronic device 40 according to this embodiment of the present invention. Figure 9 The electronic device 40 shown is merely an example and should not impose any limitation on the functionality and scope of use of the embodiments of the present invention.

[0184] like Figure 9 As shown, the electronic device 40 is manifested in the form of a general-purpose computing device. The components of the electronic device 40 may include, but are not limited to: at least one processing unit 41, at least one storage unit 42, and a bus 43 connecting different system components (including storage unit 42 and processing unit 41).

[0185] The storage unit stores program code that can be executed by the processing unit 41, causing the processing unit 41 to perform the steps described in the "Embodiment Method" section of this specification according to various exemplary embodiments of the present invention.

[0186] Storage unit 42 may include a readable medium in the form of a volatile storage unit, such as random access memory (RAM) 421 and / or cache memory 422, and may further include a read-only memory (ROM) 423.

[0187] Storage unit 42 may also include a program / utility 424 having a set (at least one) of program modules 425, including but not limited to: an operating system, one or more application programs, other program modules, and program data, each or some combination of these examples may include an implementation of a network environment.

[0188] Bus 43 can represent one or more of several types of bus structures, including a memory cell bus or memory cell controller, a peripheral bus, a graphics acceleration port, a processing unit, or a local bus using any of the multiple bus structures.

[0189] Electronic device 40 can also communicate with one or more external devices (e.g., keyboard, pointing device, Bluetooth device, etc.), and with one or more devices that enable a user to interact with electronic device 40, and / or with any device that enables electronic device 40 to communicate with one or more other computing devices (e.g., router, modem, etc.). This communication can be performed through input / output (I / O) interface 44. Furthermore, electronic device 40 can also communicate with one or more networks (e.g., local area network (LAN), wide area network (WAN), and / or public networks, such as the Internet) through network adapter 45. Figure 9 As shown, network adapter 45 communicates with other modules of electronic device 40 via bus 43. It should be understood that, although... Figure 9 As not shown, other hardware and / or software modules may be used in conjunction with electronic device 40, including but not limited to: microcode, device drivers, redundant processing units, external disk drive arrays, RAID systems, tape drives, and data backup planning systems.

[0190] From the above description of the embodiments, those skilled in the art will readily understand that the exemplary embodiments described herein can be implemented by software or by combining software with necessary hardware. Therefore, the technical solutions according to the embodiments of this disclosure can be embodied in the form of a software product, which can be stored in a non-volatile storage medium (such as a CD-ROM, USB flash drive, external hard drive, etc.) or on a network, including several instructions to cause a computing device (such as a personal computer, server, accelerometer device, or network device, etc.) to execute the method according to the embodiments of this disclosure.

[0191] Those skilled in the art will understand that all or part of the steps in the various methods of the above embodiments can be implemented by a program instructing related hardware. This program can be stored in a computer-readable storage medium, which may include: read-only memory (ROM), random access memory (RAM), a magnetic disk, or an optical disk, etc. Furthermore, it stores computer program instructions, which, when executed by a computer, cause the computer to perform the methods described above.

[0192] Furthermore, the control method and system for the accelerometer in a high-temperature environment provided by the embodiments of the present invention have been described in detail above. Specific examples have been used to illustrate the principles and implementation methods of the present invention. The description of the above embodiments is only for the purpose of helping to understand the method and core ideas of the present invention. For those skilled in the art, there will be changes in the specific implementation methods and application scope based on the ideas of the present invention. Therefore, the content of this specification should not be construed as a limitation of the present invention.

Claims

1. A method for testing an accelerometer under high-temperature conditions, characterized in that, It is applied to testing scenarios of accelerometers in high-temperature environments; The method for testing the accelerometer under high-temperature conditions includes: Acquire the positioning signal from the accelerometer and trigger the positioning detection of the accelerometer based on the positioning signal; Multiple environmental parameters of the accelerometer's location are collected based on the accelerometer's positioning detection. A high-temperature environment is defined based on multiple environmental parameters, and the corresponding test methods are matched accordingly; In the matching test method, multiple bending curvatures of the accelerometer in different dimensions are collected, and the reflection spectrum is collected under the test of multiple bending curvatures. The intensity change of the accelerometer is defined based on the identification of the reflection spectrum. The process involves: acquiring wavelength changes of the accelerometer at different temperatures and defining corresponding temperature influencing factors; applying vibration waves of different frequencies and accelerations to the accelerometer; defining the vibration frequency based on the time-domain response signal of the cladding mode; including: acquiring wavelength changes of the accelerometer at different temperatures; defining corresponding temperature influencing factors based on these wavelength changes; defining temperature sensitivity based on the temperature influencing factors, the accelerometer, and the corresponding temperatures; correlating the accelerometer and each vibration wave, where each vibration wave is at a different frequency and acceleration; acquiring the time-domain response signal of the cladding mode based on multi-dimensional testing of the accelerometer and each vibration wave; and defining the vibration frequency based on the time-domain response signal of the cladding mode. The system collects data on temperature influencing factors, vibration frequency, primary sensitivity, influencing relationships, and secondary sensitivity. Based on these data, it triggers multi-dimensional testing of the accelerometer under high-temperature conditions. This includes: testing the output voltage change of the accelerometer in cladding mode under different accelerations; calculating the corresponding primary sensitivity based on the output voltage change; triggering the amplitude-frequency response of the accelerometer at different free fiber lengths, analyzing the influence of output length on response sensitivity and resonant frequency, and collecting the secondary sensitivity of the accelerometer under high-temperature conditions; correlating temperature influencing factors, vibration frequency, primary sensitivity, influencing relationships, and secondary sensitivity; and triggering multi-dimensional testing of the accelerometer under high-temperature conditions based on these data.

2. The method for testing an accelerometer under high-temperature conditions according to claim 1, characterized in that, The process of acquiring the positioning signal from the accelerometer and triggering the positioning detection of the accelerometer based on the positioning signal includes: Acquire positioning signals from the accelerometer; The positioning information of the accelerometer is defined based on the analysis of the positioning signal from the accelerometer. The accelerometer is located based on its positioning information; When the accelerometer is in a positioning state, the control space of the accelerometer is acquired based on the accelerometer's response; The accelerometer's positioning detection is triggered based on the control space, positioning signal, and detection signal of the accelerometer.

3. The method for testing an accelerometer under high-temperature conditions according to claim 2, characterized in that, The location detection based on the accelerometer collects multiple environmental parameters of the accelerometer's location, including: Real-time monitoring of accelerometer positioning detection; In the positioning and detection of accelerometers, the location of the accelerometer is collected; The scene space is defined based on the location of the accelerometer; Define the corresponding set of environmental parameters for each scene space; Associate multiple sets of environmental parameters; Multiple environmental parameters are matched based on multiple sets of environmental parameters, and multiple environmental parameters at the location of the accelerometer are collected.

4. The method for testing an accelerometer under high-temperature conditions according to claim 3, characterized in that, The process of defining a high-temperature environment based on multiple environmental parameters and matching the corresponding test methods includes: Multiple environmental parameters at the location of the stationary accelerometer; The corresponding high-temperature environment is defined based on multiple environmental parameters at the location of the accelerometer; The corresponding temperature range is defined based on the analysis of the high-temperature environment; The corresponding high-temperature rating is defined based on this temperature range; The model of the associated accelerometer and its corresponding high-temperature rating; The appropriate testing method is matched based on the accelerometer model and its corresponding high temperature rating.

5. The method for testing an accelerometer under high-temperature conditions according to claim 4, characterized in that, In this testing method, multiple curvatures of the accelerometer in different dimensions are collected, and reflection spectra are acquired under tests at multiple curvatures. The intensity change of the accelerometer is defined based on the identification of these reflection spectra, including: In this testing method, multiple bending curvatures of the accelerometer in different dimensions are collected; Tests are triggered based on multiple bending curvatures; Reflectance spectra were collected under tests with multiple curvatures, and the total reflection spectrum and local reflection spectrum were divided based on the reflection spectrum. The intensity change of the accelerometer is defined based on the overall identification of the total reflection spectrum and the local reflection spectrum, which are correlated.

6. A testing system for accelerometers under high-temperature environments, characterized in that, The accelerometer testing system under high-temperature conditions is applied to the accelerometer testing method under high-temperature conditions as described in any one of claims 1-5, and the accelerometer testing system under high-temperature conditions includes: The acquisition module is used to acquire the positioning signal of the accelerometer and trigger the positioning detection of the accelerometer based on the positioning signal; The environmental parameter module is used to collect multiple environmental parameters of the accelerometer's location based on the accelerometer's positioning detection. The high-temperature testing module is used to define a high-temperature environment based on multiple environmental parameters and match the corresponding testing methods. The intensity change module is used to collect multiple bending curvatures of the accelerometer in different dimensions in the corresponding test mode, and to collect the reflection spectrum under the test of multiple bending curvatures. The intensity change of the accelerometer is defined based on the identification of the reflection spectrum. The vibration frequency module is used to acquire the wavelength changes of the accelerometer at different temperatures and define the corresponding temperature influencing factors. It applies vibration waves of different frequencies and accelerations to the accelerometer and defines the vibration frequency based on the time-domain response signal of the cladding mode. This includes: acquiring the wavelength changes of the accelerometer at different temperatures; defining the corresponding temperature influencing factors based on these wavelength changes; defining the temperature sensitivity based on the temperature influencing factors, the accelerometer, and the corresponding temperature; associating the accelerometer with each vibration wave, where each vibration wave is at a different frequency and acceleration; acquiring the time-domain response signal of the cladding mode based on multi-dimensional testing of the accelerometer and each vibration wave; and defining the vibration frequency based on the time-domain response signal of the cladding mode. The multi-dimensional testing module is used to collect data on temperature influencing factors, vibration frequency, primary sensitivity, influencing relationships, and secondary sensitivity. Based on these data, it triggers multi-dimensional testing of the accelerometer under high-temperature conditions. This includes: testing the output voltage change of the accelerometer in cladding mode under different accelerations; calculating the corresponding primary sensitivity based on the output voltage change; triggering the amplitude-frequency response of the accelerometer at different free fiber lengths, examining the influence of output length on response sensitivity and resonant frequency, and collecting the secondary sensitivity of the accelerometer under high-temperature conditions; correlating temperature influencing factors, vibration frequency, primary sensitivity, influencing relationships, and secondary sensitivity; and triggering multi-dimensional testing of the accelerometer under high-temperature conditions based on these data.

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