A Calibration Platform for Fiber Bragg Grating Sensors

Abstract

The present application relates to a calibration platform for fiber grating sensors, including: a platform body, a calibration system is provided on the left side of the platform body, the calibration system is specifically a data processing system built inside a computer host, and performs calibration processing on the detection data of the fiber grating sensor, a switching column is rotatably provided on the right side of the platform body, and a plurality of rectangular grooves are provided in a ring array on the outside of the switching column, and a connection platform and calibration mechanisms for different detection items connected to the connection platform are movably connected inside the rectangular grooves, and the right side and the middle of the connection platform are movably plugged into the limit mechanism. The overall structure provided by the embodiment of the present application will not cause confusion on the platform; and according to the detection data, it can not only detect the accuracy of the fiber grating sensor, but also detect whether the calibration equipment is abnormal, so that the calibration data of the fiber grating sensor is more accurate.

Description

Technical Field

[0001] The present application relates to the field of sensor technology, and in particular to a calibration platform for fiber grating sensors. Background Art

[0002] Fiber Bragg grating sensor is a kind of fiber optic sensor. The sensing process based on fiber Bragg grating is to obtain sensing information by modulating the optical fiber Bragg wavelength by external physical parameters. It is a wavelength modulated fiber optic sensor. Fiber Bragg grating sensor can realize direct measurement of physical quantities such as temperature and strain. When monitoring the measured object, in order to ensure the accuracy of the detection of the measured object, the fiber Bragg grating sensor needs to be calibrated using a calibration platform. However, when using an ordinary calibration platform, due to the different physical quantities that need to be calibrated and the different calibration equipment used, all are piled on the platform, which is very messy. In addition, the calibration of the calibration system is not accurate and comprehensive enough, and the calibrated equipment cannot be monitored, which affects the calibration results of the fiber Bragg grating sensor. Therefore, we propose a calibration platform for fiber Bragg grating sensors. Summary of the invention

[0003] The present application provides a calibration platform for a fiber grating sensor to solve the above-mentioned problems.

[0004] The present application provides a calibration platform for a fiber grating sensor, comprising:

[0005] The platform body, the left side of which is provided with a calibration system, the calibration system being specifically a data processing system built inside a computer host, for calibrating the detection data of the fiber grating sensor;

[0006] A power module is provided on the left side of the platform body, a switching column is rotatably provided on the right side of the platform body, and a plurality of rectangular grooves are provided in a ring array on the outside of the switching column, and a connection platform and calibration mechanisms for different detection items connected to the connection platform are movably connected inside the rectangular grooves, and a limiting mechanism is movably inserted into the right and middle parts of the connection platform, and the limiting mechanism limits the connection platform to be stored inside the rectangular groove;

[0007] The platform body is movably connected to a lifting plate on the upper middle side of the power module, and the lifting plate is movably connected to the inside of the rectangular groove to lift the connection platform;

[0008] The right side and the middle part of the opposite end surface of the connecting platform are both provided with limiting grooves, and the limiting columns are movably inserted inside the limiting grooves. The upper end of the limiting column is provided with a limiting sheet, and the lower end of the limiting column is fixedly connected to the bottom end of the rectangular groove, and the limiting column is inserted into the limiting groove, and a return spring is sleeved on the lower end of the limiting sheet;

[0009] A stabilizing cavity is also provided in the middle of the limiting column, a stabilizing rod is movably inserted into the interior of the stabilizing cavity, and a connecting end of the stabilizing rod is fixedly connected to the inner end of the limiting groove;

[0010] The lower left end of the connecting platform and the right end of the lifting plate are both provided with opposite inclined surfaces;

[0011] The left end of the lifting plate is fixedly connected with an electric telescopic rod, and the electric telescopic rod is fixedly connected to the left end of the platform body, and the lifting plate also movably penetrates the inner left side support plate of the plug-in platform body;

[0012] The left and right ends of the switching column are rotatably connected to the inner left support plate of the platform body and the right side wall of the platform body through bearings, the right end shaft of the switching column is fixedly connected with a transmission motor, and the transmission motor is fixedly connected to the outer end of the right side wall of the platform body, and the angle of rotation of the transmission motor each time is a set angle.

[0013] Preferably, a storage shell is fixedly connected to the left end of the platform body, a computer is placed inside the storage shell, and a protective shell is also fixedly connected to the upper end of the storage shell, a display screen is provided inside the protective shell.

[0014] Preferably, the calibration system is specifically a data processing system built inside a computer host, and the steps of calibrating the detection data of the fiber grating sensor are as follows:

[0015] Step 1, obtaining multiple groups of detection data columns through a fiber Bragg grating sensor calibration experiment, obtaining an input data column of each detection data and a standard data column of the same input data, and obtaining an offset data column through the difference between the detection data column and the standard data column;

[0016] Step 2: Obtain the accuracy of the detection data column according to the offset data column and the standard data column;

[0017] Step 3: Obtain the precise similarity of the detection data column according to the offset data column, the standard data column and the accuracy;

[0018] Step 4: According to the exact similarity, the standard difference of the fiber grating sensor detection data is obtained;

[0019] Step 5: According to the standard difference and precision, the fiber Bragg grating sensor with abnormal accuracy is obtained, and the abnormal fiber Bragg grating sensor is calibrated again.

[0020] Preferably, the method for obtaining the accuracy of the detection data column according to the offset data column and the standard data column comprises:

[0021] Obtaining the maximum value and the minimum value in the offset data column;

[0022] Calculate the average value of the offset data column and calculate the standard deviation of the standard data column;

[0023] According to the average value of the offset data column, the standard deviation of the standard data column, the maximum value and the minimum value in the offset data column, the accuracy of each fiber Bragg grating sensor detection is obtained, and the accuracy of each fiber Bragg grating sensor detection is calculated according to the following formula:

[0024] ;

[0025] Among them, D x is the accuracy of the xth fiber Bragg grating sensor after the detection, A1 x A2 is the maximum value of the offset data column detected by the xth fiber Bragg grating sensor. x A3 is the minimum value in the offset data column detected by the xth fiber Bragg grating sensor. x is the average value of the offset data column of the offset detected by the xth fiber Bragg grating sensor, B1 x is the standard deviation of the standard data series detected by the x-th fiber Bragg grating sensor.

[0026] Preferably, the method for obtaining the accurate similarity of the detection data column according to the offset data column, the standard data column and the accuracy includes:

[0027] Obtaining the absolute value of the difference between the accuracy detected by the fiber grating sensor of any input data and the standard accuracy;

[0028] The dynamic time warping algorithm is used to calculate the difference between the precision multiple measurements of the fiber Bragg grating sensor detection of an input data and the standard precision sequence;

[0029] According to the absolute value and the difference, the similarity between the accuracy of the fiber grating sensor detection of any input data and the standard accuracy is obtained;

[0030] The similarity between the accuracy of a fiber Bragg grating sensor detection of an input data and the standard accuracy is calculated according to the following formula:

[0031] ;

[0032] Among them, E a,b Indicates the similarity of the fiber Bragg grating sensor detection data to the standard data, E1 a，b Indicates the detection data of fiber Bragg grating sensor, E2 a，b Represents the precise data of fiber Bragg grating sensor.

[0033] Preferably, the method for obtaining the standard difference of the fiber grating sensor detection data according to the exact similarity includes:

[0034] The difference between the accuracy of any input data detected by the fiber Bragg grating sensor and the similarity of the standard accuracy is used to obtain the difference data, and the difference between the similarities of multiple sets of data under the same input data of the fiber Bragg grating sensor is used to obtain the difference data set.

[0035] The obtained difference data sets are summed to obtain the standard difference degree.

[0036] The above technical solution provided by the embodiment of the present application has the following advantages compared with the prior art:

[0037] The overall structure provided by the embodiment of the present application is that the transmission motor drives the switching column to rotate until the calibration mechanism of the relative detection group is located directly above and corresponds to the rectangular opening in the middle of the upper end of the platform body, and then the electric telescopic rod is started to drive the lifting plate to move to the right, so that it is plugged into the lower end of the connecting platform, and the connecting platform is lifted, so that the upper end calibration mechanism of the connecting platform is displaced upward and exposed to the upper part of the rectangular opening in the middle of the upper end of the platform body, so that the connection ports and display screens of the components of the calibration mechanism are all located at the upper end of the platform body, so that the calibration mechanisms of other detection groups will be rotated to the lower part of the platform of the platform body without causing confusion on the platform;

[0038] The dynamic time warping algorithm is used to calculate the difference between multiple measurements of the accuracy of a fiber grating sensor detection of an input data and the standard accuracy sequence. According to the absolute value and the difference, the similarity between the accuracy of the fiber grating sensor detection of any input data and the standard accuracy is obtained. The difference between the accuracy of the fiber grating sensor detection of any input data and the standard accuracy is obtained. The difference data is obtained by taking the difference in similarity between multiple groups of data under the same input data of this fiber grating sensor to obtain a difference data set. The obtained difference data sets are summed to obtain the standard difference. According to the size of the standard difference, if the difference value is large, it can be indicated that the device in the calibration mechanism is damaged and the damaged device in the calibration mechanism needs to be replaced. On the contrary, if the difference value is small, it indicates that the accuracy of the fiber grating sensor is poor. According to the detection data, not only the accuracy of the fiber grating sensor can be detected, but also whether the calibration equipment is abnormal can be detected, so that the calibration data of the fiber grating sensor is more accurate. BRIEF DESCRIPTION OF THE DRAWINGS

[0039] The accompanying drawings, which are incorporated in and constitute a part of this specification, illustrate embodiments consistent with the present application and, together with the description, serve to explain the principles of the present application.

[0040] In order to more clearly illustrate the embodiments of the present application or the technical solutions in the prior art, the drawings required for use in the embodiments or the description of the prior art will be briefly introduced below. Obviously, for ordinary technicians in this field, other drawings can be obtained based on these drawings without paying any creative labor.

[0041] Figure 1 It is a schematic diagram of the overall structure of the present invention;

[0042] Figure 2 is a cross-sectional view of the present invention;

[0043] Figure 3 This is an overall structural diagram of the switching column of the present invention;

[0044] Figure 4 For the present invention Figure 2 Enlarged view of point A in the middle;

[0045] Figure 5 This is a schematic diagram of the calibration processing steps for the detection data of the fiber grating sensor of the present invention.

[0046] In the figure: 1. Platform body; 2. Transmission motor; 3. Power module; 4. Reset spring; 5. Protective shell; 6. Display screen; 7. Storage shell; 8. Computer; 9. Electric telescopic rod; 10. Lifting plate; 11. Calibration mechanism; 12. Stabilizing rod; 13. Switching column; 14. Rectangular groove; 15. Connecting platform; 16. Limiting groove; 17. Limiting column; 18. Stabilizing cavity; 19. Limiting plate. DETAILED DESCRIPTION

[0047] In order to make the purpose, technical solution and advantages of the embodiments of the present application clearer, the technical solution in the embodiments of the present application will be clearly and completely described below in conjunction with the drawings in the embodiments of the present application. Obviously, the described embodiments are part of the embodiments of the present application, not all of the embodiments. Based on the embodiments in the present application, all other embodiments obtained by ordinary technicians in this field without making creative work are within the scope of protection of this application.

[0048] Various embodiments of the present application may exist in the form of a range. It should be understood that the description in the form of a range is only for convenience and simplicity and should not be understood as a hard limit to the scope of the present application; therefore, it should be considered that the range description has specifically disclosed all possible sub-ranges and single values ​​within the range. For example, it should be considered that the range description from 1 to 6 has specifically disclosed sub-ranges, such as from 1 to 3, from 1 to 4, from 1 to 5, from 2 to 4, from 2 to 6, from 3 to 6, etc., as well as single numbers within the range, such as 1, 2, 3, 4, 5 and 6, which are applicable regardless of the range. In addition, whenever a numerical range is indicated in the present application, it is meant to include any quoted numbers (fractions or integers) within the indicated range. Unless otherwise specified, various raw materials, reagents, instruments and equipment used in the present application, etc., can be purchased from the market or can be prepared by existing equipment.

[0049] In the present application, in the absence of any contrary description, the directional words used, such as "upper" and "lower", are specifically the directions of the drawings in the accompanying drawings. In addition, in the present application, the terms "include", "comprise", etc. refer to "including but not limited to". In the present application, 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. In the present application, "and / or" describes the association relationship of the associated objects, indicating that three relationships may exist, for example, A and / or B, which can represent: A exists alone, A and B exist at the same time, and B exists alone. Wherein A, B can be singular or plural. In the present application, "at least one" refers to one or more, and "plural" refers to two or more. "At least one", "at least one of the following" or similar expressions refer to any combination of these items, including any combination of singular items or plural items. For example, "at least one of a, b, or c" or "at least one of a, b and c" can both mean: a, b, c, ab, i.e. a and b, ac, bc, or abc, where a, b, c can be single or plural, respectively.

[0050] like Figure 1-Figure 5 As shown: This embodiment of the application provides a calibration platform for a fiber grating sensor, comprising:

[0051] The platform body 1, the left side of the platform body 1 is provided with a calibration system, the calibration system is specifically a data processing system built inside the host computer 8, and performs calibration processing on the detection data of the fiber Bragg grating sensor;

[0052] A power module 3 is provided on the left side of the platform body 1, a switching column 13 is rotatably provided on the right side of the platform body 1, and a plurality of rectangular grooves 14 are provided in a ring array on the outside of the switching column 13, and a connecting platform 15 and a calibration mechanism 11 for different detection items connected to the connecting platform 15 are movably connected inside the rectangular grooves 14, and a limiting mechanism is movably inserted on the right side and the middle of the connecting platform 15, and the limiting mechanism limits the connecting platform 15 to be stored inside the rectangular grooves 14;

[0053] The platform body 1 is movably plugged into a lifting plate 10 at the upper middle side of the power module 3 , and the lifting plate 10 is movably plugged into the rectangular groove 14 to lift the connection platform 15 .

[0054] Specifically, the transmission motor 2 drives the switching column 13 to rotate until the calibration mechanism 11 of the relative detection group is located directly above, corresponding to the rectangular opening in the middle of the upper end of the platform body 1, and then the electric telescopic rod 9 is started to drive the lifting plate 10 to move to the right, so as to be plugged into the lower end of the connecting platform 15, and the connecting platform 15 is lifted, so that the upper end calibration mechanism 11 of the connecting platform 15 is moved upward and exposed to the upper part of the rectangular opening in the middle of the upper end of the platform body 1, so that the connection ports of the components of the calibration mechanism 11 and the display screen are all located at the upper end of the platform body 1;

[0055] The angle at which the transmission motor 2 rotates each time can be the quotient of the number of sets of the calibration mechanism 11 of 360 degrees.

[0056] like Figure 4 As shown: the right side and the middle part of the opposite end faces of the connecting platform 15 are provided with limiting grooves 16, and the limiting columns 17 are movably inserted inside the limiting grooves 16. The upper end of the limiting column 17 is provided with a limiting plate 19, and the lower end of the limiting column 17 is fixedly connected to the bottom end of the rectangular groove 14, and the limiting column 17 is inserted into the outer side of the limiting groove 16, and a return spring 4 is sleeved on the lower end of the limiting plate 19.

[0057] Specifically, the limiting column 17 is inserted into the limiting groove 16, and the return spring 4 is always in a squeezed state, so that when the lifting plate 10 is pulled away from the lower end of the connecting platform 15, the connecting platform 15 is received into the rectangular groove 14, so that the switching column 13 can rotate.

[0058] like Figure 4 As shown, a stabilizing cavity 18 is further provided in the middle of the limiting column 17 , and the stabilizing rod 12 is movably inserted into the inside of the stabilizing cavity 18 , and the connecting end of the stabilizing rod 12 is fixedly connected to the inner end of the limiting groove 16 .

[0059] Specifically, the stabilizing cavity 18 and the stabilizing rod 12 are used together to make the displacement of the limiting column 17 in the limiting groove 16 more stable, and to make the vertical displacement of the connecting platform 15 stable.

[0060] like Figure 2 As shown, the lower left end of the connecting platform 15 and the right end of the lifting plate 10 are both provided with opposite inclined surfaces.

[0061] Specifically, the inclined surface enables the lifting plate 10 to be inserted into the lower end of the connecting platform 15 when it moves to the left.

[0062] like Figure 2 As shown: the left end of the lifting plate 10 is fixedly connected with the electric telescopic rod 9, and the electric telescopic rod 9 is fixedly connected to the left end of the platform body 1, and the lifting plate 10 also movably penetrates the inner left side support plate of the plug-in platform body 1.

[0063] Specifically, the electric telescopic rod 9 adopts the existing telescopic rod on the market, and the electric telescopic rod 9 can drive the lifting plate 10 to move left and right.

[0064] like Figure 1 As shown: the left and right ends of the switching column 13 are rotatably plugged into the inner left support plate of the platform body 1 and the right side wall of the platform body 1 through bearings, the right end rotating shaft of the switching column 13 is fixedly connected with the transmission motor 2, and the transmission motor 2 is fixedly connected to the outer end of the right side wall of the platform body 1, and the angle of each rotation of the transmission motor 2 is a set angle;

[0065] The left end of the platform body 1 is fixedly connected with a storage shell 7, and a computer 8 is placed inside the storage shell 7. The upper end of the storage shell 7 is also fixedly connected with a protective shell 5, and a display screen 6 is provided inside the protective shell 5.

[0066] Specifically, the display screen 6 adopts an existing display screen on the market, is connected to the host of the computer 8, and displays the data processed by the computer 8.

[0067] like Figure 5 As shown: the calibration system is specifically a data processing system built inside the host computer 8, and the steps for calibrating the detection data of the fiber Bragg grating sensor are as follows:

[0068] Step 1, obtaining multiple groups of detection data columns through a fiber Bragg grating sensor calibration experiment, obtaining an input data column of each detection data and a standard data column of the same input data, and obtaining an offset data column through the difference between the detection data column and the standard data column;

[0069] Step 2: Obtain the accuracy of the detection data column according to the offset data column and the standard data column;

[0070] Step 3: Obtain the precise similarity of the detection data column according to the offset data column, the standard data column and the accuracy;

[0071] Step 4: According to the exact similarity, the standard difference of the fiber grating sensor detection data is obtained;

[0072] Step 5: According to the standard difference and precision, the fiber Bragg grating sensor with abnormal accuracy is obtained, and the abnormal fiber Bragg grating sensor is calibrated again.

[0073] like Figure 5 As shown: the method for obtaining the accuracy of the detection data column according to the offset data column and the standard data column includes:

[0074] Obtaining the maximum value and the minimum value in the offset data column;

[0075] Calculate the average value of the offset data column and calculate the standard deviation of the standard data column;

[0076] According to the average value of the offset data column, the standard deviation of the standard data column, the maximum value and the minimum value in the offset data column, the accuracy of each fiber Bragg grating sensor detection is obtained, and the accuracy of each fiber Bragg grating sensor detection is calculated according to the following formula:

[0077] ;

[0078] Among them, D x is the accuracy of the xth fiber Bragg grating sensor after the detection, A1 x A2 is the maximum value of the offset data column detected by the xth fiber Bragg grating sensor. x A3 is the minimum value in the offset data column detected by the xth fiber Bragg grating sensor. x is the average value of the offset data column of the offset detected by the xth fiber Bragg grating sensor, B1 x is the standard deviation of the standard data series detected by the x-th fiber Bragg grating sensor.

[0079] like Figure 5 As shown: the method for obtaining the accurate similarity of the detection data column according to the offset data column, the standard data column and the accuracy includes:

[0080] Obtaining the absolute value of the difference between the accuracy detected by the fiber grating sensor of any input data and the standard accuracy;

[0081] The dynamic time warping algorithm is used to calculate the difference between the precision multiple measurements of the fiber Bragg grating sensor detection of an input data and the standard precision sequence;

[0082] According to the absolute value and the difference, the similarity between the accuracy of the fiber grating sensor detection of any input data and the standard accuracy is obtained;

[0083] The similarity between the accuracy of a fiber Bragg grating sensor detection of an input data and the standard accuracy is calculated according to the following formula:

[0084] ;

[0085] Among them, E a,b Indicates the similarity of the fiber Bragg grating sensor detection data to the standard data, E1 a，b Indicates the detection data of the fiber Bragg grating sensor, E2 a，b Represents the precise data of fiber Bragg grating sensor.

[0086] like Figure 5 As shown: The method for obtaining the standard difference of the fiber grating sensor detection data according to the precise similarity includes:

[0087] The difference between the accuracy of any input data detected by the fiber Bragg grating sensor and the similarity of the standard accuracy is used to obtain the difference data, and the difference between the similarities of multiple sets of data under the same input data of the fiber Bragg grating sensor is used to obtain the difference data set.

[0088] The obtained difference data sets are summed to obtain the standard difference degree.

[0089] Specifically: according to the size of the standard difference, if the difference value is large, it can indicate that the device in the calibration mechanism 11 is damaged and needs to be replaced. On the contrary, if the difference value is small, it indicates that the accuracy of the fiber Bragg grating sensor is poor.

[0090] Principle of use: The output ends and the final output ends of the various detection devices of the calibration mechanism 11 are connected to the input end of the computer 8, and then input to the data processing system built inside the host of the computer 8 to calibrate the detection data of the fiber Bragg grating sensor;

[0091] When testing a certain data of the fiber grating sensor, in the initial state, the electric telescopic rod 9 drives the lifting plate 10 to withdraw from the lower end of the connecting platform 15, so that each connecting platform 15 is stored in the rectangular groove 14, and then the transmission motor 2 is started, and the transmission motor 2 drives the switching column 13 to rotate, and rotates until the calibration mechanism 11 of the relative detection group is located directly above, corresponding to the rectangular opening in the middle of the upper end of the platform body 1, and then the electric telescopic rod 9 is started to drive the lifting plate 10 to move to the right, so as to be plugged into the lower end of the connecting platform 15, and the connecting platform 15 is lifted, so that the upper end calibration mechanism 11 of the connecting platform 15 is displaced upward and exposed to the upper part of the rectangular opening in the middle of the upper end of the platform body 1, so that the connection ports and display screens of the components of the calibration mechanism 11 are all located at the upper end of the platform body 1, so that the calibration mechanism 11 of other detection groups will rotate to the bottom of the platform of the platform body 1, and will not cause confusion on the platform;

[0092] When testing a certain data of the fiber Bragg grating sensor, the accuracy of multiple groups of final data detected by the fiber Bragg grating sensor is first tested. If the accuracy of the multiple groups of final data is the same as the accuracy of the standard data series, it means that the data detected by the fiber Bragg grating sensor has a higher accuracy.

[0093] If the accuracy of the multiple sets of final data differs greatly from the accuracy of the standard data series, then the accuracy of the multiple sets of final data is analyzed again, that is, the absolute value of the difference between the accuracy detected by the fiber grating sensor of any input data and the standard accuracy is obtained;

[0094] The dynamic time warping algorithm is used to calculate the difference between multiple measurements of the accuracy of a fiber grating sensor detection of an input data and a standard accuracy sequence. According to the absolute value and the difference, the similarity between the accuracy of the fiber grating sensor detection of any input data and the standard accuracy is obtained. The difference between the similarity between the accuracy of the fiber grating sensor detection of any input data and the standard accuracy is obtained to obtain the difference data set, and the difference in similarity between multiple groups of data under the same input data of this fiber grating sensor is taken to obtain the difference data set. The obtained difference data sets are summed to obtain the standard difference. According to the size of the standard difference, if the difference value is large, it can be indicated that the device in the calibration mechanism 11 is damaged and the damaged device in the calibration mechanism 11 needs to be replaced. On the contrary, if the difference value is small, it indicates that the accuracy of the fiber grating sensor is poor.

[0095] The above is only a specific implementation of the present application, so that those skilled in the art can understand or implement the present application. It will be apparent to those skilled in the art that various modifications to these embodiments are possible, and the general principles defined in the present application can be implemented in other embodiments without departing from the spirit or scope of the present application. Therefore, the present application will not be limited to these embodiments shown in the present application, but will conform to the widest scope consistent with the principles and novel features applied for by the present application.

Claims

1. A calibration platform for fiber grating sensors, characterized in that: include: A platform body (1), wherein a calibration system is provided on the left side of the platform body (1), wherein the calibration system is specifically a data processing system built inside a host computer (8) for calibrating the detection data of the fiber grating sensor; A power module (3) is provided on the left side of the platform body (1), a switching column (13) is rotatably provided on the right side of the platform body (1), and a plurality of rectangular grooves (14) are provided in a ring array on the outside of the switching column (13), and a connecting platform (15) and a calibration mechanism (11) for different detection items connected to the connecting platform (15) are movably connected inside the rectangular grooves (14), and a limiting mechanism is movably inserted on the right side and the middle of the connecting platform (15), and the limiting mechanism limits the connecting platform (15) to be stored inside the rectangular grooves (14); The platform body (1) is movably plugged into a lifting plate (10) on the upper middle side of the power module (3), and the lifting plate (10) is movably plugged into the rectangular groove (14) to lift the connection platform (15); The right side and the middle of the opposite end surface of the connecting platform (15) are provided with a limiting groove (16), the inside of the limiting groove (16) is movably plugged with a limiting column (17), the upper end of the limiting column (17) is provided with a limiting plate (19), the lower end of the limiting column (17) is fixedly connected to the bottom end of the rectangular groove (14), and the limiting column (17) is plugged into the limiting groove (16) and a return spring (4) is sleeved on the lower end of the limiting plate (19). A stabilizing cavity (18) is also provided in the middle of the limiting column (17), a stabilizing rod (12) is movably inserted into the interior of the stabilizing cavity (18), a connecting end of the stabilizing rod (12) is fixedly connected to the inner end of the limiting groove (16), and the lower left end of the connecting platform (15) and the right end of the lifting plate (10) are both provided with opposite inclined surfaces; The left and right ends of the switching column (13) are rotatably plugged into the inner left support plate of the platform body (1) and the right side wall of the platform body (1) through bearings, the right end rotation shaft of the switching column (13) is fixedly connected to a transmission motor (2), and the transmission motor (2) is fixedly connected to the outer end of the right side wall of the platform body (1), and the angle of each rotation of the transmission motor (2) is a set angle; The left end of the lifting plate (10) is fixedly connected to an electric telescopic rod (9), and the electric telescopic rod (9) is fixedly connected to the left end of the platform body (1). The lifting plate (10) also movably penetrates the inner left side support plate of the plug-in platform body (1).

2. The calibration platform for fiber grating sensors according to claim 1, characterized in that: The left end of the platform body (1) is fixedly connected to a storage shell (7), a computer (8) is placed inside the storage shell (7), and the upper end of the storage shell (7) is also fixedly connected to a protective shell (5), a display screen (6) is provided inside the protective shell (5).

3. The calibration platform for fiber grating sensors according to claim 1, characterized in that: The calibration system is specifically a data processing system built inside the host computer (8). The steps of calibrating the detection data of the fiber grating sensor are as follows: Step 1, obtaining multiple groups of detection data columns through a fiber Bragg grating sensor calibration experiment, obtaining an input data column of each detection data and a standard data column of the same input data, and obtaining an offset data column through the difference between the detection data column and the standard data column; Step 2: Obtain the accuracy of the detection data column according to the offset data column and the standard data column; Step 3: Obtain the precise similarity of the detection data column according to the offset data column, the standard data column and the accuracy; Step 4: According to the exact similarity, the standard difference of the fiber grating sensor detection data is obtained; Step 5: According to the standard difference and precision, the fiber Bragg grating sensor with abnormal accuracy is obtained, and the abnormal fiber Bragg grating sensor is calibrated again.

4. A calibration platform for fiber grating sensors according to claim 3, characterized in that: The method for obtaining the accuracy of the detection data column according to the offset data column and the standard data column comprises: Obtaining the maximum value and the minimum value in the offset data column; Calculate the average value of the offset data column and calculate the standard deviation of the standard data column; According to the average value of the offset data column, the standard deviation of the standard data column, the maximum value and the minimum value in the offset data column, the accuracy of each fiber Bragg grating sensor detection is obtained, and the accuracy of each fiber Bragg grating sensor detection is calculated according to the following formula: ； Among them, D x is the accuracy of the xth fiber Bragg grating sensor after the detection, A1 x A2 is the maximum value of the offset data column detected by the xth fiber Bragg grating sensor. x A3 is the minimum value in the offset data column detected by the xth fiber Bragg grating sensor. x is the average value of the offset data column of the offset detected by the xth fiber Bragg grating sensor, B1 x is the standard deviation of the standard data series detected by the x-th fiber Bragg grating sensor.

5. The calibration platform for fiber grating sensors according to claim 3, characterized in that: The method for obtaining the accurate similarity of the detection data column according to the offset data column, the standard data column and the accuracy includes: Obtaining the absolute value of the difference between the accuracy detected by the fiber grating sensor of any input data and the standard accuracy; The dynamic time warping algorithm is used to calculate the difference between the precision multiple measurements of the fiber Bragg grating sensor detection of an input data and the standard precision sequence; According to the absolute value and the difference, the similarity between the accuracy of the fiber grating sensor detection of any input data and the standard accuracy is obtained; The similarity between the accuracy of a fiber Bragg grating sensor detection of an input data and the standard accuracy is calculated according to the following formula: ； Among them, E a,b Indicates the similarity of the fiber Bragg grating sensor detection data to the standard data, E1 a，b Indicates the detection data of fiber Bragg grating sensor, E2 a，b Represents the precise data of fiber Bragg grating sensor.

6. The calibration platform for fiber grating sensors according to claim 3, characterized in that: The method for obtaining the standard difference of the fiber grating sensor detection data according to the precise similarity includes: The difference between the accuracy of any input data detected by the fiber Bragg grating sensor and the similarity of the standard accuracy is used to obtain the difference data, and the difference between the similarities of multiple sets of data under the same input data of the fiber Bragg grating sensor is used to obtain the difference data set. The obtained difference data sets are summed to obtain the standard difference degree.

Images