Method and device for calibrating, calibrating and verifying long baseline bending moment sensor, terminal and medium

Abstract

The invention relates to a method, a device, a terminal and a medium for calibrating, calibrating and verifying a long-baseline bending moment sensor, belongs to the field of structural health monitoring, and aims to solve the problems that the calibration precision of the long-baseline bending moment sensor is low, the operation is complicated, the verification is difficult to simulate the actual working condition, and the universality and the adaptability of the device are poor. The two ends of the long baseline bending moment sensor are fixedly connected with the movable end and the fixed end respectively, a threaded rod is arranged on one side of the micrometer and is in threaded connection with the movable end, transmission teeth are arranged on the other side of the micrometer, the driving device is in meshed connection with the transmission teeth, and the terminal and medium signal input end is connected with the signal output end of the long baseline bending moment sensor. The device can accurately simulate the working condition, improves the measurement precision and stability of the sensor, is simple and convenient to operate, improves the working efficiency, is flexible in structure, and has multiple driving modes.

Description

Technical Field

[0001] The invention relates to a method, a device, a terminal and a medium for calibrating, calibrating and verifying a long baseline bending moment sensor, and belongs to the field of structural health monitoring. Background Art

[0002] A bending moment sensor is a device used to measure the magnitude of the bending moment generated by an object under stress. It determines the bending moment (i.e. torque) applied to the object by sensing the degree of bending of the object. This sensor is widely used in engineering, structural health monitoring (SHM), automation control, and mechanical equipment to ensure that the object does not exceed its load-bearing capacity during operation to avoid damage or failure. The calibration of the bending moment sensor is a key step to ensure that it accurately measures the bending moment or force. Through calibration, sensor errors and deviations can be eliminated, and the linear relationship between its output signal and the actual applied bending moment or force can be ensured. In order to perform calibration, special calibration devices are usually required. These devices can simulate real working conditions, accurately apply known bending moments or forces, and then measure the output signal of the sensor.

[0003] The calibration of the bending moment sensor usually relies on the equipment that accurately applies the known bending moment or force. Common calibration devices include: torque standard table (torque generator), standard weight and lever system, electronic dynamometer and loading platform and turntable and sensor integrated system. The long baseline bending moment sensor is a bending moment sensor that converts the bending moment load into displacement. As a new invention, it also needs to be equipped with a special calibration device. The device also needs to meet the requirements of static loading and dynamic loading calibration and calibration at the same time. In order to meet the actual wave verification, the platform also needs to have the corresponding simulation function. Summary of the invention

[0004] The present invention proposes a method, device, terminal and medium for calibrating, verifying and verifying a long baseline bending moment sensor, so as to solve the problems in the prior art that the long baseline bending moment sensor has insufficient accuracy during the calibration process, the calibration operation is complicated and lacks versatility, and it is difficult to accurately simulate the actual working conditions during verification, resulting in low reliability of measurement results, inconvenient device operation, low efficiency and difficulty in adapting to different working environments and application scenarios.

[0005] A device for calibrating, calibrating and verifying a long baseline bending moment sensor, the device for calibrating, calibrating and verifying a long baseline bending moment sensor comprises a fixed platform, a micrometer, a long baseline bending moment sensor, a driving device, a terminal and a medium, the fixed platform comprises a mobile end and a fixed end,

[0006] The two ends of the long baseline bending moment sensor are fixedly connected to the mobile end and the fixed end respectively. One side of the micrometer is a threaded rod, and the threaded rod is threadedly connected to the mobile end. The other side of the micrometer is provided with a transmission tooth, and the driving device is meshed with the transmission tooth. The terminal is connected to the medium signal input end and the long baseline bending moment sensor signal output end.

[0007] Furthermore, the movable end of the fixed platform includes a fixed platform bottom plate and a fixed platform top plate, the fixed platform bottom plate is fixed on a fixed plane, a slide rail device is provided above the two short sides of the fixed platform bottom plate, a slider device matching the slide rail device is provided below the two short sides of the fixed platform top plate, the fixed platform top plate and the fixed platform bottom plate are slidably connected by matching the slide rail device and the slider device, a threaded hole is provided on the lower surface of the fixed platform top plate, the threaded hole is screwed to the threaded rod, a fixed disc is provided along one side of the long side of the fixed platform bottom plate, and a circumferential slide rail is provided on the inner side of the fixed disc;

[0008] The fixed end of the fixed platform includes a fixed platform tail plate, and the fixed platform tail plate includes a top plate and a bottom plate, wherein the top plate covers the bottom plate, and the top plate is flush with the height of the fixed platform top plate, and the bottom plate is flush with the height of the fixed platform bottom plate.

[0009] Furthermore, a plurality of small platforms for installing long-baseline bending moment sensors are provided on the upper surfaces of the top plates of the fixed platform and the tail plates of the fixed platform.

[0010] Furthermore, the micrometer includes a micrometer body, a threaded rod and a transmission tooth, and the threaded rod and the transmission tooth are respectively located on both sides of the micrometer body and are coaxial. The threaded rod on one side of the micrometer passes through a fixed disk on one side of the bottom plate of the fixed platform and is installed on one side of the fixed disk while maintaining the free rotation of the micrometer.

[0011] Furthermore, the driving device is a hand-cranked wheel, and the center of the hand-cranked wheel is meshedly connected with the transmission gear;

[0012] Alternatively, the driving device includes a servo motor, a driver and a transmission shaft, the signal output end of the terminal and the medium is connected to the signal input end of the driver, the signal output end of the driver is connected to the signal input end of the servo motor, the servo motor drives the micrometer to rotate through the transmission shaft, and the two ends of the transmission shaft are respectively meshed with the output shaft of the servo motor and the transmission teeth.

[0013] A method for early calibration of a long baseline bending moment sensor is applied to the above-mentioned device for calibrating, calibrating and verifying a long baseline bending moment sensor, characterized in that the method for early calibration of the long baseline bending moment sensor comprises the following steps:

[0014] S1. The main body of the long baseline bending moment sensor is a fiber Bragg grating sensor. The physical quantities that affect the grating variables are stress, strain and temperature, and the variables of strain and temperature are linearly related to the grating wavelength variable Δλ. Before the test, the coefficient k between them needs to be calibrated in advance, and the initial values ​​of the sensor grating wavelength λ, strain and temperature are calibrated at the same time. Then, during the operation of the sensor, the grating wavelength λ produces a difference with the strain and temperature. The physical quantity calculation method is as follows:

[0015]

[0016] in

[0017] λ d is the grating wavelength corresponding to the strain test;

[0018] is the grating wavelength corresponding to the strain calibration;

[0019] λ T is the grating wavelength corresponding to the test temperature;

[0020] is the grating wavelength corresponding to the calibration temperature;

[0021] k is the displacement coefficient;

[0022] S2. The displacement variable Δε and the corresponding grating wavelength variable Δλ at the displacement sensing point of the long baseline bending moment sensor are extracted by a micrometer, thereby calibrating the displacement coefficient k. The relationship is expressed as:

[0023]

[0024] This completes the preliminary calibration of the long baseline bending moment sensor.

[0025] A method for calibrating the accuracy of a long baseline bending moment sensor is applied to the above-mentioned device for calibrating, calibrating and verifying a long baseline bending moment sensor, characterized in that the method for calibrating the accuracy of the long baseline bending moment sensor comprises the following steps:

[0026] S1. Adjust the spring device inside the displacement sensing end of the long baseline bending moment sensor to make it in a natural state, and confirm again that the spring state is normal and there is no additional stress. Record the temperature of the environment where the sensor is located at this time as the basic temperature value for subsequent data processing and calibration. Zero the sensor based on this temperature value to eliminate the potential impact of temperature factors on the initial measurement.

[0027] S2. Use a micrometer to accurately measure the displacement sensing part of the long baseline bending moment sensor, obtain the displacement variable Δε of the displacement sensing part of the long baseline bending moment sensor, and simultaneously record the grating wavelength variable Δλ in the sensor at the corresponding moment;

[0028] S3, according to the displacement variable Δε at the displacement sensing point of the long baseline bending moment sensor and the actual displacement Δε at the displacement sensing end of the long baseline bending moment sensor s The difference between them is used to calculate the calibration error δ, which is expressed as:

[0029] δ=Δε-Δε s ;

[0030] S4. Use the calibrated error δ to evaluate the indication error of the device for calibrating, calibrating and verifying the long baseline bending moment sensor, assign values ​​to the marks on the scale of the micrometer, and thus complete the calibration.

[0031] A method for real-time simulation verification of wave bending moment of a long baseline bending moment sensor is applied to the above-mentioned device for calibrating, calibrating and verifying a long baseline bending moment sensor, characterized in that the method for real-time simulation verification of wave bending moment of the long baseline bending moment sensor comprises the following steps:

[0032] S1. Determine the simulated wave function, wave function S ξ (ω) is expressed as:

[0033]

[0034] Where ω is the wave period, H 1 / 3 For the meaningful wave height, is the average wave period;

[0035] S2. Considering that the long baseline bending moment sensor mainly monitors the total longitudinal bending moment of the hull, the structure between the two points of the sensor to be detected is simplified to a beam structure, and the complex wave function is converted into a form suitable for sensor monitoring, namely:

[0036] x(t)=Acos(ω l t+φ);

[0037] where ω l With the wave function S ξ The wave period ω in (ω) is equal, and the significant wave height H 1 / 3 The long baseline bending moment sensor converts the total longitudinal bending moment of the hull into a horizontal displacement Δε, that is, the amplitude A of the simple harmonic motion is used to replace the wave function S. ξ The significant wave height H in (ω) 1 / 3 , average wave period To record a specific value of a complete cycle of the wave, no consideration is given,

[0038] Therefore, the more complex wave function S ξ (ω) is transformed into the driving function S(ω):

[0039] S(ω)=A·g(ω)

[0040] Among them, ω is the wave period, A is the wave height coefficient, and g(·) is the wave period conversion function;

[0041] S3, the micrometer drive of the device is replaced by a servo motor, and the terminal and the medium control the servo motor through the driver to move according to the law of the driving function S(ω), so that the top plate of the fixed platform moves laterally according to the requirements of the simulated wave to generate corresponding bending moment changes, simulating the actual wave bending moment acting on the sensor;

[0042] S4. In the process of servo motor driving to simulate wave bending moment, the terminal and the medium record the data generated by the long baseline bending moment sensor and compare them with the corresponding theoretical values ​​to determine whether the long baseline bending moment sensor meets the accuracy requirements of practical applications.

[0043] A storage medium stores a computer program, wherein the computer program implements any of the above methods when executed by a processor.

[0044] A terminal, characterized in that it comprises: a memory, a processor, and a computer program stored in the memory and executable on the processor, wherein the processor executes the program to implement any one of the above methods.

[0045] Beneficial effects of the present invention: The method, device, terminal and medium for calibrating, calibrating and verifying a long baseline bending moment sensor described in the present invention are different in that the long baseline bending moment sensor itself can convert bending moment recognition into short-distance displacement recognition, and the device can achieve high-precision horizontal displacement. By adjusting the micrometer, displacements of different sizes can be generated, that is, replacing bending moments of different sizes, which is suitable for accurate calibration and calibration of long baseline bending moment sensors. At the same time, equipped with a servo motor and a driver, the movement of the displacement sensing end of the long baseline bending moment sensor under the measured sea conditions can be simulated. The connected terminal and medium can control the servo motor to move in multiple sea conditions such as regular waves or irregular waves, and record the displacement Δε of the displacement sensing end of the long baseline bending moment sensor and the change in the internal grating wavelength Δλ and other related parameter changes. Driven by a servo motor, it can meet long-term verification, realize instrument strength and fatigue verification, optimize and improve the factory accuracy of the sensor, and improve the quality of the sensor. BRIEF DESCRIPTION OF THE DRAWINGS

[0046] Figure 1 It is a system diagram of a device for calibrating, calibrating and verifying a long baseline bending moment sensor of the present invention;

[0047] Figure 2 The working system flow chart of the long baseline bending moment sensor fixed platform;

[0048] Figure 3 This is a sample diagram of an embodiment of a long baseline bending moment sensor fixing platform;

[0049] Figure 4 A sample diagram of an embodiment of a driving device for a fixed platform of a long baseline bending moment sensor;

[0050] Figure 5 A system flow chart of the calibration, calibration and verification method of the long baseline bending moment sensor fixed platform;

[0051] Figure 6 Schematic diagram of the working platform of the long baseline bending moment sensor.

[0052] Among them, 1 is a fixed platform, 2 is a micrometer, 3 is a long baseline bending moment sensor, 4 is a hand wheel, 5 is a servo motor, 6 is a driver, 7 is a terminal and a medium, 8 is a fixed platform bottom plate, 9 is a fixed platform top plate, 10 is a fixed platform tail plate, 11 is a transmission shaft, and 12 is a small platform. DETAILED DESCRIPTION

[0053] The technical solutions in the embodiments of the present invention will be described clearly and completely below in conjunction with the drawings in the embodiments of the present invention. Obviously, the described embodiments are only part of the embodiments 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 creative work are within the scope of protection of the present invention.

[0054] Reference Figure 1 and Figure 2 As shown, a device for calibrating, calibrating and verifying a long baseline bending moment sensor comprises a fixed platform 1, a micrometer 2, a long baseline bending moment sensor 3, a driving device and a terminal and a medium 7, wherein the fixed platform 1 comprises a mobile end and a fixed end,

[0055] The two ends of the long baseline bending moment sensor 3 are fixedly connected to the mobile end and the fixed end respectively. One side of the micrometer 2 is a threaded rod, and the threaded rod is threadedly connected to the mobile end. The other side of the micrometer 2 is provided with a transmission tooth, and the driving device is meshed with the transmission tooth. The terminal is connected to the signal input end of the medium 7 and the signal output end of the long baseline bending moment sensor 3.

[0056] Specifically, the device of the present invention constructs a stable and precisely controllable device for calibrating, calibrating and verifying a long baseline bending moment sensor by means of a threaded connection between the micrometer 2 and the mobile end and a meshing connection between the drive device and the micrometer 2. The position of the mobile end can be precisely adjusted by the rotation of the micrometer 2, thereby providing different displacement states for the long baseline bending moment sensor 3. The terminal and the medium 7 can be directly connected to the signal output end of the long baseline bending moment sensor 3, which is convenient for real-time data collection of the long baseline bending moment sensor 3, and is convenient for monitoring and analyzing the performance of the long baseline bending moment sensor 3. During the verification process, the feedback information of the long baseline bending moment sensor 3 can be quickly obtained, and then the parameters of the long baseline bending moment sensor 3 can be adjusted and optimized in time, thereby improving the overall performance and quality of the long baseline bending moment sensor 3. The micrometer 2 is not only a measuring tool, but also a key component for adjusting the state of the long baseline bending moment sensor 3 through the connection of its mechanical structure with the drive device and the mobile end, realizing the integration of measurement and adjustment functions, which is different from the traditional single measurement or simple mechanical adjustment method.

[0057] Further, see Figure 3 As shown, the movable end of the fixed platform 1 includes a fixed platform bottom plate 8 and a fixed platform top plate 9, the fixed platform bottom plate 8 is fixed on a fixed plane, a slide rail device is provided above the two short sides of the fixed platform bottom plate 8, a slider device matching the slide rail device is provided below the two short sides of the fixed platform top plate 9, the fixed platform top plate 9 and the fixed platform bottom plate 8 are connected by matching sliding of the slide rail device and the slider device, a threaded hole is provided on the lower surface of the fixed platform top plate 9, the threaded hole is screwed with a threaded rod, and a fixed disc is provided along one side of the long side of the fixed platform bottom plate 8, the fixed disc is responsible for limiting the micrometer 2 and allowing it to rotate freely along the axis;

[0058] The fixed end of the fixed platform 1 includes a fixed platform tail plate 10, and the fixed platform tail plate 10 includes a top plate and a bottom plate, wherein the top plate covers the bottom plate, and the top plate is flush with the height of the fixed platform top plate 9, and the bottom plate is flush with the height of the fixed platform bottom plate 8.

[0059] Specifically, in the present invention, the fixed platform enables the fixed platform top plate 9 of the mobile end to slide smoothly and accurately on the fixed platform bottom plate 8. Through the cooperation of the slide rail and the slider device, the smoothness and stability of the moving process are guaranteed, and a reliable displacement change environment is provided for the long baseline bending moment sensor 3, which is conducive to accurately simulating different stress conditions, thereby improving the accuracy and effectiveness of sensor calibration. The setting of the fixed disc and the inner slide rail on the fixed platform bottom plate 8 provides stable support and guidance for the installation and movement of the micrometer 2, further ensuring that the micrometer accurately drives the fixed platform top plate through the threaded rod, reducing the error caused by structural instability, and improving the reliability and accuracy of the entire device. The fixed platform tail plate 10 is flush with the fixed platform top plate 9 and the fixed platform bottom plate 8 of the mobile end, ensuring the horizontality and stability of the long baseline bending moment sensor 3 during installation, which is conducive to the long baseline bending moment sensor 3 accurately sensing the bending moment change, and also facilitates the installation and disassembly operations of the long baseline bending moment sensor 3 on the device, thereby improving work efficiency.

[0060] Furthermore, a plurality of small platforms 12 for mounting the long baseline bending moment sensors 3 are provided on the upper surfaces of the top plates of the fixed platform top plate 9 and the fixed platform tail plate 10 .

[0061] Specifically, a plurality of small platforms 12 are arranged on the top plates of the fixed platform top plate 9 and the fixed platform tail plate 10, providing a clear and stable installation position for the long baseline bending moment sensor 3, facilitating accurate positioning of the long baseline bending moment sensor 3, improving installation efficiency, reducing possible deviations during installation, ensuring the installation accuracy of the long baseline bending moment sensor 3 on the device, and thus improving the accuracy of the entire calibration, calibration and verification work. Figure 6 As shown, the multiple small platforms 12 enable the device of the present invention to simultaneously install multiple long-baseline bending moment sensors, and can be flexibly adjusted and expanded according to actual needs to meet the testing requirements of sensors of different quantities and specifications, thereby improving the versatility and practicality of the device. At the same time, the presence of the small platform 12 provides a more stable support for the long-baseline bending moment sensor 3, reduces the shaking or displacement of the long-baseline bending moment sensor 3 caused by unstable installation, can effectively avoid the interference of external factors on the sensor measurement results, ensure that the long-baseline bending moment sensor 3 can accurately sense the change of bending moment during operation, and improve the reliability and stability of the measurement data.

[0062] Furthermore, the micrometer 2 includes a micrometer body, a threaded rod and a transmission tooth, and the threaded rod and the transmission tooth are respectively located on both sides of the micrometer body and are coaxial. The threaded rod on one side of the micrometer passes through a fixed disk on one side of the bottom plate of the fixed platform and is installed on one side of the fixed disk while keeping the micrometer 2 free to rotate.

[0063] Specifically, the threaded rod and transmission teeth of the micrometer 2 are respectively located on both sides of the body and are coaxial, making the power transmission more direct and stable. Through the meshing of the transmission teeth and the driving device, the power of the driving device can be accurately transmitted to the micrometer, and then the threaded rod converts the rotation of the micrometer into linear motion, thereby accurately controlling the displacement of the fixed platform top plate 9, providing high-precision displacement input for the long baseline bending moment sensor 3. The slider arranged on the outer peripheral surface of the micrometer body matches the slide rail on the inner side of the fixed disc, so that the micrometer 2 can be stably installed on the fixed disc and maintain good guidance and stability during the movement. This matching structure of the slide rail and the slider reduces the shaking and offset that may occur when the micrometer rotates, ensures the accuracy and reliability of the micrometer movement, and thus improves the measurement accuracy of the entire device. At the same time, this structural design of the micrometer 2 makes it relatively convenient to install and disassemble, and is convenient for adjustment, maintenance and replacement during the use of the device. The clear structural layout is also conducive to the operator's understanding and mastering of the working principle of the device, improving the convenience and efficiency of operation.

[0064] Further, see Figure 4 As shown, the driving device is a hand-cranked wheel 4, the center of which is meshed and connected with the transmission gear;

[0065] Alternatively, the driving device includes a servo motor 5, a driver 6 and a transmission shaft 11, the signal output end of the terminal and the medium 7 is connected to the signal input end of the driver 6, the signal output end of the driver 6 is connected to the signal input end of the servo motor 5, the servo motor 5 drives the micrometer 2 to rotate through the transmission shaft 11, and the two ends of the transmission shaft 11 are respectively meshed with the output shaft and transmission teeth of the servo motor 5.

[0066] Specifically, this embodiment provides a manual operation mode. When some simple, small-range displacement adjustments are required, or in the initial debugging stage with relatively low precision requirements, the operator can conveniently control the micrometer 2 by directly turning the hand wheel 4, and then adjust the position of the fixed platform top plate 9. It is convenient and intuitive, does not require additional electrical equipment support, and is simple and easy to operate. The servo motor 5 is suitable for scenes that require precise and complex motion control. The terminal and the medium 7 can send precise control signals to the servo motor 5 through the driver 6 to achieve precise control of the rotation of the micrometer 2. In this mode, various complex motion modes can be simulated, such as specific regular motion when simulating wave bending moment, which meets the test requirements of the long baseline bending moment sensor 3 under different working conditions and greatly expands the application range of the device. In the servo motor drive mode, the dynamic changes in various actual working conditions can be accurately simulated through programming and signal control. For example, when simulating wave bending moment, the micrometer 2 can be accurately controlled to drive the fixed platform top plate 9 to move according to the specific wave function law, thereby providing a highly simulated force environment for the long baseline bending moment sensor 3, making the verification result of the sensor more reliable, which helps to improve the performance and adaptability of the sensor in practical applications. The coexistence of two driving modes provides users with room for choice. In different use stages of the device, or according to different test tasks and budgets, users can flexibly switch driving modes. At the same time, the design of dual driving modes coexisting is also convenient for subsequent upgrading and expansion of the device. For example, when higher precision and complex motion control are required, the servo motor drive module can be directly used, and the hand-cranked wheel drive can be retained as a backup or basic operating mode. Whether it is the meshing of the hand-cranked wheel 2 with the transmission teeth through the center, or the meshing of the servo motor 5 with the transmission teeth through the transmission shaft 11, efficient power transmission can be achieved. The two ends of the transmission shaft 11 are tightly meshed with the output shaft and the transmission teeth of the servo motor 5, respectively, to ensure that the power of the servo motor 5 can be stably and accurately transmitted to the micrometer 2, reducing power loss and transmission error, and ensuring the stability and accuracy of the device operation.

[0067] Reference Figure 5 As shown, a preliminary calibration method of a long baseline bending moment sensor is applied to the above-mentioned device for calibrating, calibrating and verifying a long baseline bending moment sensor, characterized in that the preliminary calibration method of the long baseline bending moment sensor comprises the following steps:

[0068] S1. Specifically, the pre-calibration method of the long baseline bending moment sensor, the main body of the long baseline bending moment sensor is a fiber Bragg grating sensor. Generally speaking, the physical quantities that affect the grating variables are stress, strain and temperature. The sensor is provided with a fiber Bragg grating (FBG) strain sensing point and a temperature sensing point. It is known that the variables of strain and temperature are linearly related to the grating wavelength variable Δλ, and the coefficient k between them can be calibrated in advance before testing. The sensor grating wavelength λ is calibrated in advance before measurement, and the initial values ​​of strain and temperature are calibrated. Subsequently, during the operation of the sensor, the grating wavelength λ produces a difference with strain and temperature. The specific physical quantity calculation method is as follows:

[0069]

[0070] in

[0071] λ d is the grating wavelength corresponding to the strain test;

[0072] is the grating wavelength corresponding to the strain calibration;

[0073] λ T is the grating wavelength corresponding to the test temperature;

[0074] is the grating wavelength corresponding to the calibration temperature;

[0075] k is the displacement coefficient;

[0076] S2. The displacement variable Δε and the corresponding grating wavelength variable Δλ at the displacement sensing point of the long baseline bending moment sensor are extracted by a micrometer, thereby calibrating the displacement coefficient k. The relationship is expressed as:

[0077]

[0078] This completes the preliminary calibration of the long baseline bending moment sensor.

[0079] A method for calibrating the accuracy of a long baseline bending moment sensor is applied to the above-mentioned device for calibrating, calibrating and verifying a long baseline bending moment sensor, characterized in that the method for calibrating the accuracy of the long baseline bending moment sensor comprises the following steps:

[0080] S1. Adjust the spring device inside the displacement sensing end of the long baseline bending moment sensor to make it in a natural state, and confirm again that the spring state is normal and there is no additional stress. Record the temperature of the environment where the sensor is located at this time as the basic temperature value for subsequent data processing and calibration. Zero the sensor based on this temperature value to eliminate the potential impact of temperature factors on the initial measurement.

[0081] S2. Use a micrometer to accurately measure the displacement sensing part of the long baseline bending moment sensor, obtain the displacement variable Δε of the displacement sensing part of the long baseline bending moment sensor, and simultaneously record the grating wavelength variable Δλ in the sensor at the corresponding moment;

[0082] S3, according to the displacement variable Δε at the displacement sensing point of the long baseline bending moment sensor and the actual displacement Δε at the displacement sensing end of the long baseline bending moment sensor s The difference between them is used to calculate the calibration error δ, which is expressed as:

[0083] δ=Δε-Δε s ;

[0084] S4. Use the calibrated error δ to evaluate the indication error of the device for calibrating, calibrating and verifying the long baseline bending moment sensor, assign values ​​to the marks on the scale of the micrometer, and thus complete the calibration.

[0085] Specifically, the accuracy calibration method of the long baseline bending moment sensor is a set of operations to determine the relationship between the indication of a measuring instrument or measuring system, or the value represented by a physical measuring tool or a standard material, and the corresponding known value of the measured object under specified conditions. As can be seen from the above, the sensor is affected by strain and temperature, so its working conditions are set in advance: that is, the spring device inside the displacement sensing end of the long baseline bending moment sensor is in a natural state, and the temperature at this time is recorded, and the long baseline sensor is zeroed according to the above environmental conditions.

[0086] Distinguish the displacement Δε measured by the micrometer and the actual displacement Δε of the displacement sensing end of the long baseline bending moment sensor s Due to the presence of spring structure, fiber Bragg grating and related transmission devices inside the long baseline bending moment sensor, it is impossible to ensure that the measured displacement Δε is equal to the actual displacement Δε s , so the sensor can be calibrated in advance by a micrometer or other device, and the calibration error δ can be expressed as:

[0087] δ=Δε-Δε s

[0088] The calibrated error δ can be used to evaluate the indication error of the measurement system, assign values ​​to the marks on the micrometer scale, improve the accuracy of the long baseline bending moment sensor itself, and ensure the quality of the long baseline bending moment sensor.

[0089] A method for real-time simulation verification of wave bending moment of a long baseline bending moment sensor is applied to the above-mentioned device for calibrating, calibrating and verifying a long baseline bending moment sensor, characterized in that the method for real-time simulation verification of wave bending moment of the long baseline bending moment sensor comprises the following steps:

[0090] S1. Determine the simulated wave function, wave function S ξ(ω) is expressed as:

[0091]

[0092] Where ω is the wave period, H 1 / 3 For the meaningful wave height, is the average wave period;

[0093] S2. Considering that the long baseline bending moment sensor mainly monitors the total longitudinal bending moment of the hull, the structure between the two points of the sensor to be detected is simplified to a beam structure, and the complex wave function is converted into a form suitable for sensor monitoring, namely:

[0094] x(t)=A cos(ω l t+φ);

[0095] where ω l With the wave function S ξ The wave period ω in (ω) is equal, and the significant wave height H 1 / 3 The long baseline bending moment sensor converts the total longitudinal bending moment of the hull into a horizontal displacement Δε, that is, the amplitude A of the simple harmonic motion is used to replace the wave function S. ξ The significant wave height H in (ω) 1 / 3 , average wave period To record a specific value of a complete cycle of the wave, no consideration is given,

[0096] Therefore, the more complex wave function S ξ (ω) is transformed into the driving function S(ω):

[0097] S(ω)=A·g(ω)

[0098] Among them, ω is the wave period, A is the wave height coefficient, and g(·) is the wave period conversion function;

[0099] S3, the micrometer drive of the device is replaced by a servo motor, and the terminal and the medium control the servo motor through the driver to move according to the law of the driving function S(ω), so that the top plate of the fixed platform moves laterally according to the requirements of the simulated wave to generate corresponding bending moment changes, simulating the actual wave bending moment acting on the sensor;

[0100] S4. In the process of servo motor driving to simulate wave bending moment, the terminal and the medium record the data generated by the long baseline bending moment sensor and compare them with the corresponding theoretical values ​​to determine whether the long baseline bending moment sensor meets the accuracy requirements of practical applications.

[0101] Specifically, the wave bending moment real-time simulation verification method of the long baseline bending moment sensor, the device can simulate waves of a certain period, the wave function S ξ (ω) is generally expressed as:

[0102]

[0103] Where ω is the wave period; H 1 / 3 For the righteous wave high; is the average wave period.

[0104] By the wave function S ξ (ω) It can be seen that the wave function is mainly affected by three important variables, but the wave acts on the hull frame structure. The frame structure is a three-dimensional surface structure. According to Kirchhoff plate theory, the plate under free vibration is affected by bending stiffness, thickness, deflection, etc. However, the main monitoring object of the long baseline bending moment sensor is the total longitudinal bending moment of the hull. Distributed long baseline monitoring is used to achieve global monitoring, so the structure between the two points of the sensor under detection can be simplified to a beam structure, that is, it can be simplified to a first-order linear ordinary differential equation. The solution is usually in the form of simple harmonic motion, which can be expressed as:

[0105] x(t)=Acos(ω l t+φ)

[0106] where ω l With the wave function S ξ The wave period ω in (ω) is equal. The significant wave height H 1 / 3 The long baseline bending moment sensor can convert the total longitudinal bending moment of the hull into a horizontal displacement Δε, that is, the amplitude A of the simple harmonic motion can be used to replace the wave function S. ξ The significant wave height H in (ω) 1 / 3 Average wave period To record the specific value of a complete cycle of the wave, usually a longer time span, can be ignored.

[0107] Thus, the more complex wave function S ξ (ω) is transformed into the driving function S(ω):

[0108] S(ω)=A·g(ω)

[0109] Where ω is the wave period; A is the wave height coefficient; and g(·) is the wave period conversion function.

[0110] A storage medium stores a computer program, wherein the computer program implements any of the above methods when executed by a processor.

[0111] Specifically, a computer program for implementing the calibration, calibration and verification of a long baseline bending moment sensor is stored in a medium, so that these methods can be conveniently stored, transmitted and used in a digital form. Regardless of the hardware environment that supports the operation of the computer program, as long as the processor can read the storage medium, the corresponding method can be executed, which greatly improves the versatility and ease of use of the method, reduces the threshold for use, and facilitates different researchers and engineers to apply these methods in different scenarios. The computer program automatically executes the relevant methods, avoiding the errors and inefficiencies that may occur in manual operations. The computer can quickly and accurately perform data processing, calculation and control operations according to preset algorithms and steps. For example, in the calibration process of a long baseline bending moment sensor, it can quickly complete the calculation and analysis of a large amount of data, greatly shorten the calibration time, improve the efficiency of the entire workflow, and save a lot of manpower and time costs for the research and development, production and application of the sensor. The method executed by the computer program is highly repeatable. Each time the same program is run, consistent results will be obtained under the same input conditions. This is crucial for the calibration, calibration and verification of long baseline bending moment sensors. It can ensure the accuracy and stability of the measurement results, facilitate multiple experiments and comparative analysis, and provide reliable data support for the evaluation and optimization of sensor performance. The computer program on the storage medium is easy to maintain and update. With the development of long baseline bending moment sensor technology and the deepening of research, it may be necessary to improve and optimize the relevant methods. At this time, only the computer program in the storage medium needs to be modified and updated to quickly apply new methods and algorithms without large-scale changes to the entire hardware system, which reduces the maintenance cost and difficulty of the system and improves the adaptability and flexibility of the system. The storage medium provides a secure storage environment for computer programs and related data. The storage medium can be encrypted, backed up, and other operations can be performed to ensure the security and integrity of the program and data, prevent data loss or tampering, and is of great significance for the protection of important data and algorithms related to long baseline bending moment sensors.

[0112] A terminal, characterized in that it comprises: a memory, a processor, and a computer program stored in the memory and executable on the processor, wherein the processor executes the program to implement any one of the above methods.

[0113] Specifically, a computer program for implementing the calibration, calibration and verification of a long baseline bending moment sensor is stored in a medium, so that these methods can be conveniently stored, transmitted and used in a digital form. Regardless of the hardware environment that supports the operation of the computer program, as long as the processor can read the storage medium, the corresponding method can be executed, which greatly improves the versatility and ease of use of the method, reduces the threshold for use, and facilitates different researchers and engineers to apply these methods in different scenarios. The computer program automatically executes the relevant methods, avoiding the errors and inefficiencies that may occur in manual operations. The computer can quickly and accurately perform data processing, calculation and control operations according to preset algorithms and steps. For example, in the calibration process of a long baseline bending moment sensor, it can quickly complete the calculation and analysis of a large amount of data, greatly shorten the calibration time, improve the efficiency of the entire workflow, and save a lot of manpower and time costs for the research and development, production and application of the sensor. The method executed by the computer program is highly repeatable. Each time the same program is run, consistent results will be obtained under the same input conditions. This is crucial for the calibration, verification and verification of long-baseline bending moment sensors. It can ensure the accuracy and stability of the measurement results, facilitate multiple experiments and comparative analysis, and provide reliable data support for the evaluation and optimization of sensor performance. The computer program on the storage medium is easy to maintain and update. With the development of long-baseline bending moment sensor technology and the deepening of research, it may be necessary to improve and optimize the relevant methods. At this time, only the computer program in the storage medium needs to be modified and updated to quickly apply new methods and algorithms without large-scale changes to the entire hardware system, which reduces the maintenance cost and difficulty of the system and improves the adaptability and flexibility of the system.

[0114] In this embodiment, the terminal may be a computing device such as a desktop computer, a notebook, a PDA, a cloud server, etc. The terminal may include, but is not limited to, a processor and a memory, and may include more components than the above structure, or a combination of certain components, or different components. For example, the terminal may also include input and output devices, network access devices, buses, etc.

[0115] The processor may be a central processing unit, or other general-purpose processors, digital signal processors, application-specific integrated circuits, field programmable gate arrays, or other programmable logic device discrete gates or transistor logic device discrete hardware components. A general-purpose processor may be a microprocessor or the processor may also be any conventional processor. The memory may be an internal storage unit of the terminal, such as a hard disk or memory of the terminal. The memory may also be an external storage device of the terminal, such as a plug-in hard disk, a smart memory card, and a flash memory card equipped on the terminal.

[0116] The method, device, terminal and medium for calibrating, calibrating and verifying a long baseline bending moment sensor described in the present invention are different in that the long baseline bending moment sensor itself can convert bending moment recognition into short-distance displacement recognition, and the device can achieve high-precision horizontal displacement. By adjusting the micrometer, displacements of different sizes can be generated, that is, replacing bending moments of different sizes, which is suitable for accurate calibration and calibration of long baseline bending moment sensors. At the same time, equipped with a servo motor and a driver, the movement of the displacement sensing end of the long baseline bending moment sensor under the measured sea conditions can be simulated. The connected terminal and medium can control the servo motor to move in multiple sea conditions such as regular waves or irregular waves, and record the displacement Δε of the displacement sensing end of the long baseline bending moment sensor and the change in the internal grating wavelength Δλ and other related parameter changes. Driven by a servo motor, it can meet long-term verification, realize instrument strength and fatigue verification, optimize and improve the factory accuracy of the sensor, and improve the quality of the sensor.

[0117] It should be noted that, in this article, relational terms such as "first" and "second" are only used to distinguish one entity or operation from another entity or operation, and do not necessarily require or imply any such actual relationship or order between these entities or operations. Moreover, the terms "include", "comprise" or any other variants thereof are intended to cover non-exclusive inclusion, so that a process, method, article or device including a series of elements includes not only those elements, but also other elements not explicitly listed, or also includes elements inherent to such process, method, article or device. In addition, "front", "back", "left", "right", "upper" and "lower" in this article are all referenced to the placement state shown in the accompanying drawings.

[0118] Finally, it should be noted that the above embodiments are only used to illustrate the technical solutions of the present invention, rather than to limit it. Although the present invention has been described in detail with reference to the aforementioned embodiments, those skilled in the art should understand that they can still modify the technical solutions described in the aforementioned embodiments, or make equivalent replacements for some of the technical features therein. However, these modifications or replacements do not deviate the essence of the corresponding technical solutions from the spirit and scope of the technical solutions of the embodiments of the present invention.

Claims

1. A device for calibrating, calibrating and verifying a long baseline bending moment sensor, characterized in that: The device for calibrating, calibrating and verifying a long-baseline bending moment sensor comprises a fixed platform (1), a micrometer (2), a long-baseline bending moment sensor (3), a driving device and a terminal and a medium (7), wherein the fixed platform (1) comprises a mobile end and a fixed end, The two ends of the long baseline bending moment sensor (3) are fixedly connected to the mobile end and the fixed end respectively; one side of the micrometer (2) is a threaded rod, the threaded rod is threadedly connected to the mobile end; the other side of the micrometer (2) is provided with a transmission tooth, the driving device is meshedly connected to the transmission tooth, and the terminal is connected to the medium (7) signal input end and the long baseline bending moment sensor (3) signal output end.

2. A device for calibrating, calibrating and verifying a long baseline bending moment sensor according to claim 1, characterized in that: The movable end of the fixed platform (1) comprises a fixed platform bottom plate (8) and a fixed platform top plate (9), the fixed platform bottom plate (8) is fixed on a fixed plane, a slide rail device is provided above the two short sides of the fixed platform bottom plate (8), a slider device matching the slide rail device is provided below the two short sides of the fixed platform top plate (9), the fixed platform top plate (9) and the fixed platform bottom plate (8) are connected by matching sliding of the slide rail device and the slider device, a threaded hole is provided on the lower surface of the fixed platform top plate (9), the threaded hole is screwed to the threaded rod, a fixed disc is provided along one side of the long side of the fixed platform bottom plate (8), and a circumferential slide rail is provided on the inner side of the fixed disc; The fixed end of the fixed platform (1) comprises a fixed platform tail plate (10), and the fixed platform tail plate (10) comprises a top plate and a bottom plate, wherein the top plate is fixed on the bottom plate, and the top plate is flush with the height of the fixed platform top plate (9), and the bottom plate is flush with the height of the fixed platform bottom plate (8).

3. A device for calibrating, calibrating and verifying a long baseline bending moment sensor according to any one of claim 2, characterized in that: The upper surfaces of the top plates of the fixed platform top plate (9) and the fixed platform tail plate (10) are both provided with a plurality of small platforms (12) for mounting the long baseline bending moment sensors (3).

4. The device for calibrating, calibrating and verifying a long baseline bending moment sensor according to claim 3, characterized in that: The micrometer (2) comprises a micrometer body, a threaded rod and a transmission tooth, wherein the threaded rod and the transmission tooth are respectively located on both sides of the micrometer body and are coaxial, and the threaded rod on one side of the micrometer passes through a fixed disc on one side of a fixed platform bottom plate (8) and is installed on one side of the fixed disc while maintaining the free rotation of the micrometer (2).

5. The device for calibrating, calibrating and verifying a long baseline bending moment sensor according to claim 4, characterized in that: The driving device is a hand-cranked wheel (4), the center of which is meshedly connected with the transmission gear; Alternatively, the driving device comprises a servo motor (5), a driver (6) and a transmission shaft (11); the signal output end of the terminal and the medium (7) is connected to the signal input end of the driver (6); the signal output end of the driver (6) is connected to the signal input end of the servo motor (5); the servo motor (5) drives the micrometer (2) to rotate via the transmission shaft (11); and the two ends of the transmission shaft (11) are respectively meshed with the output shaft of the servo motor (5) and the transmission teeth.

6. A method for pre-calibration of a long baseline bending moment sensor, applied to a device for calibrating, calibrating and verifying a long baseline bending moment sensor according to any one of claims 1 to 5, characterized in that: The preliminary calibration method of the long baseline bending moment sensor comprises the following steps: S1. The main body of the long baseline bending moment sensor is a fiber Bragg grating sensor. The physical quantities that affect the grating variables are stress, strain and temperature. The variables of strain and temperature are linearly related to the grating wavelength variable Δλ. Before the test, the coefficient k between them needs to be calibrated in advance. At the same time, the initial values ​​of the sensor grating wavelength λ, strain and temperature are calibrated. Then, during the operation of the sensor, the grating wavelength λ varies with strain and temperature. The physical quantity calculation method is as follows: in λ d is the grating wavelength corresponding to the strain test; λ d0 is the grating wavelength corresponding to the strain calibration; λ T is the grating wavelength corresponding to the test temperature; λ T0 is the grating wavelength corresponding to the calibration temperature; k is the displacement coefficient; S2. The displacement variable Δε and the corresponding grating wavelength variable Δλ at the displacement sensing point of the long baseline bending moment sensor are extracted by a micrometer, thereby calibrating the displacement coefficient k. The relationship is expressed as: This completes the preliminary calibration of the long baseline bending moment sensor.

7. A method for calibrating the accuracy of a long baseline bending moment sensor, applied to a device for calibrating, calibrating and verifying a long baseline bending moment sensor as claimed in any one of claims 1 to 5, characterized in that: The accuracy calibration method of the long baseline bending moment sensor comprises the following steps: S1. Adjust the spring device inside the displacement sensing end of the long baseline bending moment sensor to make it in a natural state, and confirm again that the spring state is normal and there is no additional stress. Record the temperature of the environment where the sensor is located at this time as the basic temperature value for subsequent data processing and calibration. Zero the sensor based on this temperature value to eliminate the potential impact of temperature factors on the initial measurement. S2. Use a micrometer to accurately measure the displacement sensing part of the long baseline bending moment sensor, obtain the displacement variable Δε of the displacement sensing part of the long baseline bending moment sensor, and simultaneously record the grating wavelength variable Δλ in the sensor at the corresponding moment; S3, according to the displacement variable Δε at the displacement sensing point of the long baseline bending moment sensor and the actual displacement Δε at the displacement sensing end of the long baseline bending moment sensor s The difference between them is used to calculate the calibration error δ, which is expressed as: d=N / A-N / A s ; S4. Use the calibrated error δ to evaluate the indication error of the device for calibrating, calibrating and verifying the long baseline bending moment sensor, assign values ​​to the marks on the scale of the micrometer, and thus complete the calibration.

8. A method for real-time simulation verification of wave bending moment of a long baseline bending moment sensor, applied to a device for calibrating, calibrating and verifying a long baseline bending moment sensor as claimed in any one of claims 1 to 5, characterized in that: The wave bending moment real-time simulation verification method of the long baseline bending moment sensor comprises the following steps: S1. Determine the simulated wave function, wave function S ξ (ω) is expressed as: Where ω is the wave period, H 1 / 3 For the meaningful wave height, is the average wave period; S2. Considering that the long baseline bending moment sensor mainly monitors the total longitudinal bending moment of the hull, the structure between the two points of the sensor to be detected is simplified to a beam structure, and the complex wave function is converted into a form suitable for sensor monitoring, namely: x(t)=Acos(ω l t+φ); where ω l With the wave function S ξ The wave period ω in (ω) is equal, and the significant wave height H 1 / 3 The long baseline bending moment sensor converts the total longitudinal bending moment of the hull into a horizontal displacement Δε, that is, the amplitude A of the simple harmonic motion is used to replace the wave function S. ξ The significant wave height H in (ω) 1 / 3 , average wave period To record a specific value of a complete cycle of the wave, no consideration is given, Therefore, the more complex wave function S ξ (ω) is transformed into the driving function S(ω): S(ω)=A·g(ω) Among them, ω is the wave period, A is the wave height coefficient, and g(·) is the wave period conversion function; S3, the micrometer drive of the device is replaced by a servo motor, and the terminal and the medium control the servo motor through the driver to move according to the law of the driving function S(ω), so that the top plate of the fixed platform moves laterally according to the requirements of the simulated wave to generate corresponding bending moment changes, simulating the actual wave bending moment acting on the sensor; S4. In the process of servo motor driving to simulate wave bending moment, the terminal and the medium record the data generated by the long baseline bending moment sensor and compare them with the corresponding theoretical values ​​to determine whether the long baseline bending moment sensor meets the accuracy requirements of practical applications.

9. A storage medium having a computer program stored thereon, characterized in that: When the computer program is executed by a processor, the method according to any one of claims 6 to 8 is implemented.

10. A terminal, characterized in that: include: A memory, a processor, and a computer program stored in the memory and executable on the processor, wherein the processor executes the program to implement the method according to any one of claims 6 to 8.

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