Carbon contact strip loss estimation method, data processor and estimation system

Abstract

The invention provides a carbon slide plate loss estimation method, a data processor and an estimation system, and the method comprises the steps: determining a temperature change score of a carbon slide plate at each first set position in response to the obtained first wavelength variation of a temperature grating string; determining a temperature change value of the carbon slide plate based on the temperature change score at the first set position; in response to the obtained second wavelength variable quantity of the strain grating string, determining a stress change value of the carbon slide plate at each second setting position in combination with the temperature change value; based on the stress change value of the carbon slide plate at each strain grating string, determining the wear thickness value of the carbon slide plate at the second setting position of each strain grating string; and determining the actual wear condition of the carbon contact strip based on the wear thickness value of the carbon contact strip at each second set position. Therefore, the temperature grating sensor arranged on the carbon slide plate can be utilized to detect the temperature change value in the carbon slide plate, and further, the actual wear condition of the carbon slide plate can be detected with high precision.

Description

Technical Field

[0001] The present application relates to the technical field of wear monitoring, and in particular to a carbon slide plate loss estimation method, a data processor and an estimation system. Background Art

[0002] The two main problems faced by carbon slide plates during operation are temperature rise and wear. Explaining temperature rise from the perspective of thermal effects, the thermal effect at the mechanical level is mainly manifested as sliding friction heat, and the thermal effect at the electrical level includes Joule heat generated by contact resistance and arc heat generated by bow-net offline. Bow-net sliding electrical contact is an electromechanical contact. Under the combined effect of high-speed sliding and strong current, the temperature rise of the bow-net contact surface is mainly composed of three parts: sliding friction heat, contact resistance heat, and bow-net arc heat; wear mainly refers to the wear caused by contact between the power supply cable and the carbon slide plate, because the carbon slide plate needs to protect the power supply cable through active sacrificial wear.

[0003] The temperature and wear generated by the carbon slide during operation are usually analyzed by various methods such as simulation analysis, experimental analysis, and image analysis. However, in the above methods, the temperature can only be analyzed on the surface, and the internal temperature of the carbon slide cannot be accurately measured, which reduces the monitoring accuracy of the carbon slide temperature and, in turn, affects the monitoring accuracy of the wear of the carbon slide. Summary of the invention

[0004] In view of this, the purpose of the present application is to provide a carbon slide board loss estimation method, a data processor and an estimation system, which can accurately measure the temperature change value and actual wear condition of the carbon slide board through the temperature grating sensor and the strain grating sensor arranged on the carbon slide board, thereby improving the estimation accuracy of the actual wear condition of the carbon slide board.

[0005] The embodiment of the present application provides a method for estimating carbon slide plate loss, which is applied to a data processor; the estimation method includes:

[0006] In response to obtaining the first wavelength change amount of each temperature grating string in the temperature grating sensor, determining the temperature change score of the carbon slide board at the first setting position of each temperature grating string; wherein the temperature grating sensor is set on the carbon slide board;

[0007] Determining a temperature change value of the carbon slide board based on a temperature change score of the carbon slide board at a first setting position of each temperature grating string;

[0008] In response to obtaining the second wavelength change of each strain grating string in the strain grating sensor, combined with the temperature change value of the carbon slide board, determining the stress change value of the carbon slide board at the second setting position of each strain grating string; wherein the strain grating sensor is set on the carbon slide board;

[0009] For each strain grating string, based on the stress change value of the carbon slide plate at the second setting position of the strain grating string and in combination with the material strain factor of the carbon slide plate, determine the wear thickness value of the carbon slide plate at the second setting position of the strain grating string;

[0010] Based on the wear thickness values ​​of the carbon slide plate at each second setting position, the actual wear condition of the carbon slide plate is determined.

[0011] In a possible implementation, in response to acquiring the first wavelength change of each temperature grating string in the temperature grating sensor, determining the temperature change value of the carbon slide plate at the first setting position of each temperature grating string includes:

[0012] For each temperature grating string, in response to obtaining a first reflection wavelength output by the temperature grating string, combined with a first incident wavelength of incident light received by the temperature grating string, determining a first wavelength change amount generated when the incident light passes through a first setting position of the temperature grating string;

[0013] Based on the first wavelength change, the thermal expansion coefficient of the temperature grating string and the initial Bragg wavelength of the temperature grating string, a temperature change value of the carbon slide plate at a first setting position of the temperature grating string is determined.

[0014] In a possible implementation, in response to obtaining the second wavelength change of each strain grating string in the strain grating sensor, determining the stress change value of the carbon slide board at the second setting position of each strain grating in combination with the temperature change value of the carbon slide board includes:

[0015] For each strain grating string, in response to obtaining a second reflection wavelength output by the strain grating string, combined with a second incident wavelength of incident light received by the strain grating string, determining a second wavelength change amount generated when the incident light passes through a second setting position of the strain grating string;

[0016] Based on the second wavelength change, the temperature change value of the carbon slide plate, the effective photoelastic coefficient and the initial Bragg wavelength, the stress change value of the carbon slide plate at the second setting position of the temperature grating string is determined.

[0017] In a possible implementation manner, determining the actual wear condition of the carbon slide board based on the wear thickness value of the carbon slide board at each second setting position includes:

[0018] Based on the wear thickness values ​​of the carbon slide plate at each second setting position, a wear space distribution diagram of the carbon slide plate is drawn to display the actual wear condition of the carbon slide plate through the wear space distribution diagram.

[0019] In a possible implementation, the estimation method further includes:

[0020] Based on the stress change value of the carbon slide board at the second setting position of each strain grating string and the accumulated usage time of the carbon slide board, the actual wear condition of the carbon slide board is determined by using a pre-trained wear estimation model and referring to the wear rate of the carbon slide board.

[0021] In a possible implementation, the wear estimation model is trained by the following steps:

[0022] Obtain the sample strain value and wear condition label of each carbon skateboard sample at each historical cumulative time node;

[0023] The pre-built linear fitting model is trained using the sample strain value and wear condition label of each carbon slide plate sample at each historical cumulative time node to determine the wear rate of the carbon slide plate over time, thereby obtaining a trained wear estimation model.

[0024] The present application also provides a data processor, the data processor comprising:

[0025] A first temperature estimation module, for determining a temperature change score of the carbon slide board at a first setting position of each temperature grating string in response to obtaining a first wavelength change amount of each temperature grating string in the temperature grating sensor; wherein the temperature grating sensor is arranged on the carbon slide board;

[0026] A second temperature estimation module, used for determining a temperature change value of the carbon slide board based on a temperature change score of the carbon slide board at a first setting position of each temperature grating string;

[0027] A strain estimation module, for determining a stress change value of the carbon slide board at a second setting position of each strain grating string in response to obtaining a second wavelength change value of each strain grating string in the strain grating sensor and combining the temperature change value of the carbon slide board; wherein the strain grating sensor is arranged on the carbon slide board;

[0028] A wear value determination module is used to determine, for each strain grating string, a wear thickness value of the carbon slide at the second setting position of the strain grating string based on the stress change value of the carbon slide at the second setting position of the strain grating string and in combination with the material strain factor of the carbon slide;

[0029] The wear condition determination module is used to determine the actual wear condition of the carbon slide plate based on the wear thickness value of the carbon slide plate at each second setting position.

[0030] In a possible implementation manner, when the first temperature estimation module is used to determine the temperature change value of the carbon slide plate at the first setting position of each temperature grating string in response to obtaining the first wavelength change amount of each temperature grating string in the temperature grating sensor, the first temperature estimation module is used to:

[0031] For each temperature grating string, in response to obtaining a first reflection wavelength output by the temperature grating string, combined with a first incident wavelength of incident light received by the temperature grating string, determining a first wavelength change amount generated when the incident light passes through a first setting position of the temperature grating string;

[0032] Based on the first wavelength change, the thermal expansion coefficient of the temperature grating string and the initial Bragg wavelength of the temperature grating string, a temperature change value of the carbon slide plate at a first setting position of the temperature grating string is determined.

[0033] In a possible implementation, when the strain estimation module is used to determine the stress change value of the carbon slide board at the second setting position of each strain grating in response to obtaining the second wavelength change of each strain grating string in the strain grating sensor and combining the temperature change value of the carbon slide board, the strain estimation module is used to:

[0034] For each strain grating string, in response to obtaining a second reflection wavelength output by the strain grating string, combined with a second incident wavelength of incident light received by the strain grating string, determining a second wavelength change amount generated when the incident light passes through a second setting position of the strain grating string;

[0035] Based on the second wavelength change, the temperature change value of the carbon slide plate, the effective photoelastic coefficient and the initial Bragg wavelength, the stress change value of the carbon slide plate at the second setting position of the temperature grating string is determined.

[0036] In a possible implementation manner, when the wear value determination module is used to determine the actual wear condition of the carbon slide board based on the wear thickness value of the carbon slide board at each second setting position, the wear value determination module is used to:

[0037] Based on the wear thickness values ​​of the carbon slide plate at each second setting position, a wear space distribution diagram of the carbon slide plate is drawn to display the actual wear condition of the carbon slide plate through the wear space distribution diagram.

[0038] In a possible implementation, the data processor further includes a model estimation module, and the model estimation module is used to:

[0039] Based on the stress change value of the carbon slide board at the second setting position of each strain grating string and the accumulated usage time of the carbon slide board, the actual wear condition of the carbon slide board is determined by using a pre-trained wear estimation model and referring to the wear rate of the carbon slide board.

[0040] In a possible implementation manner, the data processor further includes a model training module, and the model training module is used to train a wear estimation model through the following steps:

[0041] Obtain the sample strain value and wear condition label of each carbon skateboard sample at each historical cumulative time node;

[0042] The pre-built linear fitting model is trained using the sample strain value and wear condition label of each carbon slide plate sample at each historical cumulative time node to determine the wear rate of the carbon slide plate over time, thereby obtaining a trained wear estimation model.

[0043] The embodiment of the present application also provides a carbon slide plate loss estimation system, the carbon slide plate loss estimation system comprises a carbon slide plate, a fiber Bragg grating demodulator and the above-mentioned data processor;

[0044] A temperature grating sensor and a strain grating sensor are respectively arranged on two sides of the carbon slide plate;

[0045] The fiber Bragg grating demodulator is communicatively connected with the temperature grating sensor and the strain grating sensor, and the fiber Bragg grating demodulator is used to measure the first wavelength variation generated by the temperature grating sensor and the second wavelength variation generated by the strain grating sensor;

[0046] The data processor is used to determine the actual wear condition of the carbon slide plate based on the first wavelength change amount generated by the temperature grating sensor and the second wavelength change amount generated by the strain grating sensor.

[0047] In a possible implementation, the temperature grating sensor includes a plurality of temperature grating strings; the plurality of temperature grating strings are respectively arranged at one-third, one-half and two-thirds of the carbon slide plate from the bottom to the top;

[0048] The strain grating sensor includes a plurality of strain grating strings; the plurality of strain grating strings are respectively arranged at one third, one half and two thirds of the carbon slide plate from the bottom to the top.

[0049] In one embodiment, a plurality of grooves are arranged on both sides of the carbon slide plate, and the temperature grating sensor and the strain grating sensor are arranged in the grooves.

[0050] An embodiment of the present application also provides an electronic device, including: a processor, a memory and a bus, wherein the memory stores machine-readable instructions executable by the processor, and when the electronic device is running, the processor and the memory communicate through the bus, and when the machine-readable instructions are executed by the processor, the steps of the carbon slide loss estimation method as described above are performed.

[0051] An embodiment of the present application further provides a computer-readable storage medium having a computer program stored thereon. When the computer program is executed by a processor, the steps of the above-mentioned method for estimating carbon slide loss are executed.

[0052] The embodiment of the present application provides a method for estimating the loss of a carbon slide plate, a data processor and an estimation system. In response to obtaining the first wavelength change of each temperature grating string in the temperature grating sensor, the temperature change score of the carbon slide plate at the first setting position of each temperature grating string is determined; based on the temperature change score of the carbon slide plate at the first setting position of each temperature grating string, the temperature change value of the carbon slide plate is determined; in response to obtaining the second wavelength change of each strain grating string in the strain grating sensor, the stress change value of the carbon slide plate at the second setting position of each strain grating string is determined in combination with the temperature change value of the carbon slide plate; for each strain grating string, based on the stress change value of the carbon slide plate at the second setting position of the strain grating string, combined with the material strain factor of the carbon slide plate, the wear thickness value of the carbon slide plate at the second setting position of the strain grating string is determined; based on the wear thickness value of the carbon slide plate at each second setting position, the actual wear condition of the carbon slide plate is determined. Here, the temperature grating sensor set on the carbon slide plate can be used to detect the temperature change value inside the carbon slide plate, and then, the actual wear condition of the carbon slide plate can be detected with high precision, thereby ensuring the accuracy of the monitoring result of the wear condition of the carbon slide plate.

[0053] In order to make the above-mentioned objects, features and advantages of the present application more obvious and easy to understand, preferred embodiments are specifically cited below and described in detail with reference to the attached drawings. BRIEF DESCRIPTION OF THE DRAWINGS

[0054] In order to more clearly illustrate the technical solutions of the embodiments of the present application, the drawings required for use in the embodiments will be briefly introduced below. It should be understood that the following drawings only show certain embodiments of the present application and therefore should not be regarded as limiting the scope. For ordinary technicians in this field, other related drawings can be obtained based on these drawings without paying creative work.

[0055] Figure 1 A carbon slide plate loss estimation system provided in an embodiment of the present application;

[0056] Figure 2A flow chart of a method for estimating carbon slide plate loss provided in an embodiment of the present application;

[0057] Figure 3 One of the structural schematic diagrams of a data processor provided in an embodiment of the present application;

[0058] Figure 4 A second structural diagram of a data processor provided in an embodiment of the present application;

[0059] Figure 5 A schematic diagram of the structure of an electronic device provided in an embodiment of the present application. DETAILED DESCRIPTION

[0060] To make the purpose, technical scheme and advantages of the embodiments of the present application clearer, the technical scheme 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 only a part of the embodiments of the present application, rather than all of the embodiments. The components of the embodiments of the present application usually described and shown in the drawings here can be arranged and designed in various different configurations. Therefore, the following detailed description of the embodiments of the present application provided in the drawings is not intended to limit the scope of the application claimed for protection, but merely represents the selected embodiments of the present application. Based on the embodiments of the present application, each other embodiment obtained by those skilled in the art without making creative work belongs to the scope of protection of the present application.

[0061] Research has found that the two main problems faced by carbon slide plates during operation are temperature rise and wear. Explaining temperature rise from the perspective of thermal effects, the thermal effect at the mechanical level is mainly manifested as sliding friction heat, and the thermal effect at the electrical level includes Joule heat generated by contact resistance and arc heat generated by bow-net offline. As an electromechanical contact, the temperature rise of the bow-net contact surface under the combined effect of high-speed sliding and strong current is mainly composed of three parts: sliding friction heat, contact resistance heat and bow-net arc heat; wear mainly refers to the wear caused by contact between the power supply cable and the carbon slide plate, because the carbon slide plate needs to protect the power supply cable through active sacrificial wear.

[0062] The temperature and wear generated by the carbon slide during operation are usually analyzed by various methods such as simulation analysis, experimental analysis, and image analysis. However, in the above methods, the temperature can only be analyzed on the surface, and the internal temperature of the carbon slide cannot be accurately measured, which reduces the monitoring accuracy of the carbon slide temperature and, in turn, affects the monitoring accuracy of the wear of the carbon slide.

[0063] Based on this, an embodiment of the present application provides a method for estimating the loss of a carbon slide board, which can utilize a temperature grating sensor arranged on the carbon slide board to detect the temperature change value inside the carbon slide board, and then, detect the actual wear condition of the carbon slide board with high precision, thereby ensuring the accuracy of the monitoring results of the carbon slide board wear condition.

[0064] See also Figure 1 , Figure 1 A carbon slide loss estimation system provided in an embodiment of the present application; Figure 1 As shown, the carbon slide plate loss estimation system includes a carbon slide plate, a fiber grating demodulator and a data processor.

[0065] In order to measure the temperature change and stress change value inside the carbon slide, a group of grating sensors are set on both sides of the carbon slide; that is, a temperature grating sensor is set on one side of the carbon slide, and a strain grating sensor is set on the other side of the carbon slide.

[0066] Specifically, multiple grooves are set on both sides of the carbon skateboard, and multiple fiber grating strings (temperature grating strings and strain grating strings) included in the grating sensors (temperature grating sensors and strain grating sensors) are respectively set in different grooves; the width and height of the grooves need to be larger than the maximum diameter of the fiber grating string.

[0067] In one embodiment, the temperature grating sensor includes multiple temperature grating strings; the multiple temperature grating strings are respectively arranged at one third (in the groove), one half (in the groove) and two thirds (in the groove) of one side of the carbon slide plate from bottom to top.

[0068] The temperature grating string includes multiple gratings, and the distance between two adjacent gratings is 100 mm; the central grating located at the center of the temperature grating string is located at the middle position of the carbon slide plate; the other gratings in the temperature grating string are symmetrical with the central grating as the center.

[0069] In one embodiment, a plurality of grooves are arranged on both sides of the carbon slide plate, and the temperature grating sensor and the strain grating sensor are arranged in the grooves.

[0070] Wherein, a plurality of temperature grating strings are arranged in the groove by bonding;

[0071] Correspondingly, the strain grating sensor includes multiple strain grating strings; the multiple strain grating strings are respectively arranged at one-third (in the groove), one-half (in the groove) and two-thirds (in the groove) of the other side of the carbon slide plate from bottom to top.

[0072] The strain grating string includes multiple gratings, and the distance between two adjacent gratings is 100 mm; the central grating located at the center of the temperature grating string is located in the middle of the carbon slide plate; the other gratings in the temperature grating string are symmetrical with the central grating as the center.

[0073] Wherein, a plurality of strain grating strings are arranged in the groove by bonding;

[0074] The fiber Bragg grating demodulator is communicatively connected with the temperature grating sensor and the strain grating sensor, and the fiber Bragg grating demodulator is used to measure the first wavelength variation generated by the temperature grating sensor and the second wavelength variation generated by the strain grating sensor;

[0075] The data processor is used to determine the actual wear condition of the carbon slide plate based on the first wavelength change amount generated by the temperature grating sensor and the second wavelength change amount generated by the strain grating sensor.

[0076] See also Figure 2 , Figure 2 A flowchart of a method for estimating carbon slide loss provided in an embodiment of the present application. Applied to a data processor; Figure 2 As shown in , the method for estimating the loss of the carbon slide provided in the embodiment of the present application includes:

[0077] S201 , in response to obtaining a first wavelength change amount of each temperature grating string in the temperature grating sensor, determining a temperature change score of the carbon slide plate at a first setting position of each temperature grating string.

[0078] S202 . Determine a temperature change value of the carbon slide board based on a temperature change score of the carbon slide board at a first setting position of each temperature grating string.

[0079] S203 , in response to obtaining the second wavelength change of each strain grating string in the strain grating sensor, determining the stress change value of the carbon slide board at the second setting position of each strain grating string in combination with the temperature change value of the carbon slide board.

[0080] S204. For each strain grating string, based on the stress change value of the carbon slide plate at the second setting position of the strain grating string and in combination with the material strain factor of the carbon slide plate, determine the wear thickness value of the carbon slide plate at the second setting position of the strain grating string.

[0081] S205: Determine the actual wear condition of the carbon slide board based on the wear thickness value of the carbon slide board at each second setting position.

[0082] A method for estimating carbon slide plate loss provided in an embodiment of the present application utilizes a temperature grating sensor disposed on the carbon slide plate to accurately measure the temperature change value inside the carbon slide plate by sensing the first wavelength change amount generated by a temperature grating string in the temperature grating sensor when a light source passes through the temperature grating sensor, so that the temperature analysis process is no longer limited to the surface of the carbon slide plate, thereby improving the accuracy of the measurement result;

[0083] In addition, the strain grating sensor arranged on the carbon slide board is used to estimate the wear thickness value of the carbon slide board at each second setting position by sensing the second wavelength change generated by the strain grating string in the strain grating sensor when the light source passes through the strain grating sensor, and referring to the material strain factor of the carbon slide board. In this way, the wear thickness value of the carbon slide board at each second setting position can be used to accurately estimate the actual wear condition of the carbon slide board.

[0084] The data processor is communicatively connected to the fiber Bragg grating demodulator. If the data processor obtains the first wavelength variation produced by each temperature grating string in the temperature grating sensor sent by the fiber Bragg grating demodulator, the temperature variation produced in the carbon slide board can be estimated by using the first wavelength variation.

[0085] In step S201, the data processor responds to obtaining the first wavelength change of each temperature grating string in the temperature grating sensor sent by the fiber grating demodulator, and for each temperature grating string, determines the temperature change score generated by the carbon slide board at the first setting position where the temperature grating string is located using the first wavelength change generated by the temperature grating string.

[0086] Wherein, the temperature grating sensor is arranged on the carbon slide plate.

[0087] Here, the first wavelength variation generated by the temperature grating string may be measured by measuring the incident wavelength and the reflected wavelength of the incident light passing through the temperature grating string.

[0088] In one implementation, step S201 includes:

[0089] S2011. For each temperature grating string, in response to obtaining a first reflected wavelength output by the temperature grating string and combining the first incident wavelength of the incident light received by the temperature grating string, determine a first wavelength change generated when the incident light passes through a first setting position of the temperature grating string.

[0090] In this step, for each temperature grating string included in the temperature grating sensor, when the first reflected wavelength output by the temperature grating string is obtained, the wavelength change value of the incident light after passing through the temperature grating string can be determined in combination with the first incident wavelength when the incident light irradiates the temperature grating string;

[0091] Specifically, in response to obtaining the first reflected wavelength output by the temperature grating string, the first incident wavelength when the incident light irradiates the temperature grating string is obtained, and by calculating the difference between the first incident wavelength and the first reflected wavelength, the first wavelength change generated by the incident light passing through the first setting position of the temperature grating string is determined.

[0092] S2012: Determine a temperature change value of the carbon slide plate at a first setting position of the temperature grating string based on the first wavelength change, the thermal expansion coefficient of the temperature grating string, and the initial Bragg wavelength.

[0093] In this step, the temperature change value ΔT of the carbon slide plate at the first setting position of the temperature grating string is calculated by the following formula:

[0094] Δλ1=αλΔT;

[0095] Wherein, ΔT is the temperature change value of the carbon slide plate at the first setting position of the temperature grating string, α is the thermal expansion coefficient of the temperature grating string, λ is the initial Bragg wavelength, and Δλ1 is the first wavelength change amount.

[0096] In step S202, after determining the temperature change score at the first setting position of each temperature grating string on the carbon slide board, the temperature change value generated by the carbon slide board during operation can be determined by calculating the average of multiple temperature change scores.

[0097] In step S203, in response to obtaining the second wavelength change of each strain grating string in the strain grating sensor sent by the fiber grating demodulator, the data processor determines, for each strain grating string, the stress change value generated by the carbon slide plate at the second setting position where the strain grating string is located using the second wavelength change generated by the strain grating string.

[0098] Wherein, the strain grating sensor is arranged on the carbon slide plate.

[0099] Here, the second wavelength variation generated by the strained grating string may be measured by measuring the incident wavelength and the reflected wavelength of the incident light passing through the strained grating string.

[0100] In one implementation, step S203 includes:

[0101] S2031. For each strain grating string, in response to obtaining a second reflection wavelength output by the strain grating string, and in combination with a second incident wavelength of incident light received by the strain grating string, determine a second wavelength change generated when the incident light passes through a second setting position of the strain grating string.

[0102] In this step, for each strain grating string included in the strain grating sensor, when the second reflection wavelength output by the strain grating string is obtained, the wavelength change value of the incident light after passing through the strain grating string can be determined in combination with the second incident wavelength when the incident light irradiates the strain grating string;

[0103] Specifically, in response to obtaining the second reflected wavelength output by the strain grating string, the second incident wavelength when the incident light irradiates the strain grating string is obtained, and by calculating the difference between the second incident wavelength and the second reflected wavelength, the second wavelength change generated by the incident light passing through the second setting position of the strain grating string is determined.

[0104] S2032, determining a stress change value of the carbon slide board at a second setting position of the temperature grating string based on the second wavelength change, the temperature change value of the carbon slide board, the effective photoelastic coefficient, and the initial Bragg wavelength.

[0105] In this step, the stress change value ε of the carbon slide plate at the second setting position of the strain grating string is calculated by the following formula: i :

[0106] Δλ2=λ·[(1-p e )·∈ i +αΔT];

[0107] Among them, ∈ i is the stress change value of the carbon slide at the second setting position of the i-th strain grating string, λ is the initial Bragg wavelength, p e is the photoelastic coefficient, which is usually about 0.22, ΔT is the temperature change value of the carbon slide plate at the first setting position of the temperature grating string, and α is the thermal expansion coefficient of the temperature grating string.

[0108] Here, by subtracting the effect of temperature change, we get the stress change ∈ i :

[0109]

[0110] In the embodiment of the present application, the height position (i.e., setting position) of each fiber grating string (including a temperature grating string and a strain grating string) on ​​the carbon slide board is different; therefore, the stress change values ​​generated by the carbon slide board at different setting heights are different. At this time, the wear thickness values ​​generated by the carbon slide board at different setting positions can be determined based on the stress change values ​​at different positions on the carbon slide board.

[0111] In step S204, for each strain grating string, based on the stress change value of the carbon slide board at the second setting position of the strain grating string and combined with the material strain factor of the carbon slide board, the actual thickness value of the carbon slide board at the second setting position of the strain grating string is determined; then, using the initial thickness value of the carbon slide board, the difference between the initial thickness value of the carbon slide board and the actual thickness value is determined as the wear thickness value of the carbon slide board at the second setting position of the strain grating string.

[0112] The actual thickness value W of the carbon slide plate at the second setting position of the i-th strain grating string is calculated by the following formula: i .

[0113]

[0114] Among them, W i is the actual thickness value of the carbon slide at the second setting position of the i-th strain grating string, ∈ i is the stress change value of the carbon slide plate at the second setting position of the i-th strain grating string, and K is the material strain factor of the carbon slide plate.

[0115] The K value is generally obtained by deploying sensors to simulate the wear of the carbon slide and the loading of the bow-net contact force. Different types of carbon slides have large K deviations, while the K values ​​of carbon slides of the same model and process are very close.

[0116] In step S205, the wear thickness values ​​of the carbon slide board at each second setting position are integrated to analyze and determine the actual wear condition on the carbon slide board (for example, the wear thickness value of the carbon slide board at the second setting position of the i-th strain grating string is greater than the wear thickness value of the carbon slide board at the second setting position of the i-1th strain grating string).

[0117] Here, in order to intuitively show the actual wear condition of the carbon slide plate, the overall wear condition of the carbon slide plate can be further refined by drawing a wear spatial distribution diagram.

[0118] In one implementation, step S205 includes:

[0119] Based on the wear thickness values ​​of the carbon slide plate at each second setting position, a wear space distribution diagram of the carbon slide plate is drawn to display the actual wear condition of the carbon slide plate through the wear space distribution diagram.

[0120] Here, there is a linear relationship between the historical wear data and strain data (including strain, temperature, skateboard usage time, vehicle speed, skateboard position, etc.) of the carbon skateboard on the same line (for example, subway vehicles on the same line) in different time periods; therefore, in fact, methods such as principal component analysis (PCA) can also be used to fit the linear (or nonlinear) relationship between usage time and wear conditions, and establish a wear estimation model for the carbon skateboard (such as a linear degradation or probability statistical model, etc.), so as to use the wear estimation model to realize the estimation of the actual wear condition of the carbon skateboard.

[0121] Here, the linear relationship between usage time and wear is:

[0122] W(t)=W0+βt;

[0123] Where W(t) represents the linear relationship between usage time and wear, W0 is the initial thickness of the carbon slide, and β is the wear rate.

[0124] In one embodiment, the estimation method further includes:

[0125] Based on the stress change value of the carbon slide board at the second setting position of each strain grating string and the accumulated usage time of the carbon slide board, the actual wear condition of the carbon slide board is determined by using a pre-trained wear estimation model and referring to the wear rate of the carbon slide board.

[0126] In this step, the stress change value of the carbon slide board at the second setting position of each strain grating string and the accumulated usage time of the carbon slide board are used as input features and input into a pre-trained wear estimation model. The wear estimation model combines the stress change value of the carbon slide board at the second setting position of each strain grating string and the accumulated usage time of the carbon slide board to estimate the actual wear condition of the carbon slide board.

[0127] In one embodiment, the wear estimation model is trained by the following steps:

[0128] Step a: Obtain the sample strain value and wear condition label of each carbon skateboard sample at each historical cumulative time node.

[0129] In this step, for each carbon slide plate sample, the sample strain value generated by the carbon slide plate sample at each historical cumulative time node and the wear condition label of the carbon slide plate sample at each historical cumulative time node are collected.

[0130] Step b: using the sample strain value and wear condition label of each carbon slide plate sample at each historical cumulative time node to train a pre-built linear fitting model, determine the wear rate of the carbon slide plate over time, and obtain a trained wear estimation model.

[0131] In this step, the sample strain value and historical cumulative time node of each carbon skateboard sample at each historical cumulative time node are used as input features, and the wear condition label of the carbon skateboard sample at each historical cumulative time node is used as output feature. The pre-constructed linear fitting model is trained to determine the wear rate β of the carbon skateboard over time, and obtain the trained wear estimation model.

[0132] Here, after determining the stress change value at each second setting position, the stress change value can also be used to determine the pull-out value that the carbon slide board is subjected to at the second setting position, so as to evaluate the working state of the carbon slide board by determining the comprehensive pull-out value that the carbon slide board is subjected to.

[0133] The embodiment of the present application provides a method for estimating the loss of a carbon slide plate. In response to obtaining the first wavelength change of each temperature grating string in the temperature grating sensor, the temperature change score of the carbon slide plate at the first setting position of each temperature grating string is determined; based on the temperature change score of the carbon slide plate at the first setting position of each temperature grating string, the temperature change value of the carbon slide plate is determined; in response to obtaining the second wavelength change of each strain grating string in the strain grating sensor, the stress change value of the carbon slide plate at the second setting position of each strain grating string is determined in combination with the temperature change value of the carbon slide plate; for each strain grating string, based on the stress change value of the carbon slide plate at the second setting position of the strain grating string, combined with the material strain factor of the carbon slide plate, the wear thickness value of the carbon slide plate at the second setting position of the strain grating string is determined; based on the wear thickness value of the carbon slide plate at each second setting position, the actual wear condition of the carbon slide plate is determined. Here, the temperature grating sensor set on the carbon slide plate can be used to detect the temperature change value inside the carbon slide plate, and then the actual wear condition of the carbon slide plate can be detected with high precision, thereby ensuring the accuracy of the monitoring results of the wear condition of the carbon slide plate.

[0134] See also Figure 3 , Figure 4 , Figure 3 This is one of the structural diagrams of a data processor provided in an embodiment of the present application. Figure 4 This is a second structural diagram of a data processor provided in an embodiment of the present application. Figure 3 As shown in , the data processor 300 includes:

[0135] A first temperature estimation module 310 is used to determine the temperature change score of the carbon slide board at the first setting position of each temperature grating string in response to obtaining the first wavelength change amount of each temperature grating string in the temperature grating sensor; wherein the temperature grating sensor is set on the carbon slide board;

[0136] A second temperature estimation module 320, for determining a temperature change value of the carbon slide board based on a temperature change score of the carbon slide board at a first setting position of each temperature grating string;

[0137] The strain estimation module 330 is used to determine the stress change value of the carbon slide board at the second setting position of each strain grating string in response to the second wavelength change amount of each strain grating string in the strain grating sensor, combined with the temperature change value of the carbon slide board; wherein the strain grating sensor is set on the carbon slide board;

[0138] A wear value determination module 340 is used to determine, for each strain grating string, a wear thickness value of the carbon slide at the second setting position of the strain grating string based on a stress change value of the carbon slide at the second setting position of the strain grating string and a material strain factor of the carbon slide;

[0139] The wear condition determination module 350 is used to determine the actual wear condition of the carbon slide plate based on the wear thickness value of the carbon slide plate at each second setting position.

[0140] Further, when the first temperature estimation module 310 is used to determine the temperature change value of the carbon slide plate at the first setting position of each temperature grating string in response to obtaining the first wavelength change amount of each temperature grating string in the temperature grating sensor, the first temperature estimation module 310 is used to:

[0141] For each temperature grating string, in response to obtaining a first reflection wavelength output by the temperature grating string, combined with a first incident wavelength of incident light received by the temperature grating string, determining a first wavelength change amount generated when the incident light passes through a first setting position of the temperature grating string;

[0142] Based on the first wavelength change, the thermal expansion coefficient of the temperature grating string and the initial Bragg wavelength of the temperature grating string, a temperature change value of the carbon slide plate at a first setting position of the temperature grating string is determined.

[0143] Further, when the strain estimation module 330 is used to determine the stress change value of the carbon slide board at the second setting position of each strain grating in response to obtaining the second wavelength change amount of each strain grating string in the strain grating sensor and combining the temperature change value of the carbon slide board, the strain estimation module 330 is used to:

[0144] For each strain grating string, in response to obtaining a second reflection wavelength output by the strain grating string, combined with a second incident wavelength of incident light received by the strain grating string, determining a second wavelength change amount generated when the incident light passes through a second setting position of the strain grating string;

[0145] Based on the second wavelength change, the temperature change value of the carbon slide plate, the effective photoelastic coefficient and the initial Bragg wavelength, the stress change value of the carbon slide plate at the second setting position of the temperature grating string is determined.

[0146] Further, when the wear value determination module 340 is used to determine the actual wear condition of the carbon slide board based on the wear thickness value of the carbon slide board at each second setting position, the wear value determination module 340 is used to:

[0147] Based on the wear thickness values ​​of the carbon slide plate at each second setting position, a wear space distribution diagram of the carbon slide plate is drawn to display the actual wear condition of the carbon slide plate through the wear space distribution diagram.

[0148] Further, such as Figure 4 As shown, the data processor 300 further includes a model estimation module 360, and the model estimation module 360 ​​is used to:

[0149] Based on the stress change value of the carbon slide board at the second setting position of each strain grating string and the accumulated usage time of the carbon slide board, the actual wear condition of the carbon slide board is determined by using a pre-trained wear estimation model and referring to the wear rate of the carbon slide board.

[0150] Further, such as Figure 4 As shown, the data processor 300 further includes a model training module 370, and the model training module 370 is used to train a wear estimation model through the following steps:

[0151] Obtain the sample strain value and wear condition label of each carbon skateboard sample at each historical cumulative time node;

[0152] The pre-built linear fitting model is trained using the sample strain value and wear condition label of each carbon slide plate sample at each historical cumulative time node to determine the wear rate of the carbon slide plate over time, thereby obtaining a trained wear estimation model.

[0153] A data processor provided by an embodiment of the present application determines the temperature change score of the carbon skateboard at the first setting position of each temperature grating string in response to the first wavelength change of each temperature grating string in the temperature grating sensor; determines the temperature change value of the carbon skateboard based on the temperature change score of the carbon skateboard at the first setting position of each temperature grating string; determines the stress change value of the carbon skateboard at the second setting position of each strain grating string in response to the second wavelength change of each strain grating string in the strain grating sensor, combined with the temperature change value of the carbon skateboard; for each strain grating string, based on the stress change value of the carbon skateboard at the second setting position of the strain grating string, combined with the material strain factor of the carbon skateboard, determines the wear thickness value of the carbon skateboard at the second setting position of the strain grating string; based on the wear thickness value of the carbon skateboard at each second setting position, determines the actual wear condition of the carbon skateboard. Here, the temperature grating sensor set on the carbon skateboard can be used to detect the temperature change value inside the carbon skateboard, and then, the actual wear condition of the carbon skateboard can be detected with high precision, thereby ensuring the accuracy of the monitoring results of the wear condition of the carbon skateboard.

[0154] See also Figure 5 , Figure 5 This is a schematic diagram of the structure of an electronic device provided in an embodiment of the present application. Figure 5 As shown in , the electronic device 500 includes a processor 510 , a memory 520 and a bus 530 .

[0155] The memory 520 stores machine-readable instructions executable by the processor 510. When the electronic device 500 is running, the processor 510 communicates with the memory 520 via the bus 530. When the machine-readable instructions are executed by the processor 510, the above-mentioned Figure 2 The steps of the method for estimating the carbon slide plate loss in the method embodiment shown, and the specific implementation method can be found in the method embodiment, which will not be repeated here.

[0156] The present application also provides a computer-readable storage medium on which a computer program is stored. When the computer program is executed by a processor, the computer program can execute the above-mentioned Figure 2 The steps of the method for estimating the carbon slide plate loss in the method embodiment shown, and the specific implementation method can be found in the method embodiment, which will not be repeated here.

[0157] Those skilled in the art can clearly understand that, for the convenience and brevity of description, the specific working processes of the systems, devices and units described above can refer to the corresponding processes in the aforementioned method embodiments and will not be repeated here.

[0158] In the several embodiments provided in the present application, it should be understood that the disclosed systems, devices and methods can be implemented in other ways. The device embodiments described above are merely schematic. For example, the division of the units is only a logical function division. There may be other division methods in actual implementation. For example, multiple units or components can be combined or integrated into another system, or some features can be ignored or not executed. Another point is that the mutual coupling or direct coupling or communication connection shown or discussed can be through some communication interfaces, and the indirect coupling or communication connection of devices or units can be electrical, mechanical or other forms.

[0159] The units described as separate components may or may not be physically separated, and the components shown as units may or may not be physical units, that is, they may be located in one place or distributed on multiple network units. Some or all of the units may be selected according to actual needs to achieve the purpose of the solution of this embodiment.

[0160] In addition, each functional unit in each embodiment of the present application may be integrated into one processing unit, or each unit may exist physically separately, or two or more units may be integrated into one unit.

[0161] If the functions are implemented in the form of software functional units and sold or used as independent products, they can be stored in a non-volatile computer-readable storage medium that is executable by a processor. Based on this understanding, the technical solution of the present application can essentially be embodied in the form of a software product, or in other words, the part that contributes to the prior art or the part of the technical solution. The computer software product is stored in a storage medium, including several instructions for a computer device (which can be a personal computer, a server, or a network device, etc.) to perform all or part of the steps of the method described in each embodiment of the present application. The aforementioned storage medium includes: various media that can store program codes, such as a USB flash drive, a mobile hard disk, a read-only memory (ROM), a random access memory (RAM), a magnetic disk or an optical disk.

[0162] Finally, it should be noted that the above-described embodiments are only specific implementation methods of the present application, which are used to illustrate the technical solutions of the present application, rather than to limit them. The protection scope of the present application is not limited thereto. Although the present application is described in detail with reference to the above-mentioned embodiments, ordinary technicians in the field should understand that any technician familiar with the technical field can still modify the technical solutions recorded in the above-mentioned embodiments within the technical scope disclosed in the present application, or can easily think of changes, or make equivalent replacements for some of the technical features therein; and these modifications, changes or replacements do not make the essence of the corresponding technical solutions deviate from the spirit and scope of the technical solutions of the embodiments of the present application, and should be included in the protection scope of the present application. Therefore, the protection scope of the present application shall be based on the protection scope of the claims.

Claims

1. A method for estimating carbon slide loss, characterized in that: Applied to a data processor; the estimation method comprises: In response to obtaining the first wavelength change amount of each temperature grating string in the temperature grating sensor, determining the temperature change score of the carbon slide board at the first setting position of each temperature grating string; wherein the temperature grating sensor is set on the carbon slide board; Determining a temperature change value of the carbon slide board based on a temperature change score of the carbon slide board at a first setting position of each temperature grating string; In response to obtaining the second wavelength change of each strain grating string in the strain grating sensor, combined with the temperature change value of the carbon slide board, determining the stress change value of the carbon slide board at the second setting position of each strain grating string; wherein the strain grating sensor is set on the carbon slide board; For each strain grating string, based on the stress change value of the carbon slide plate at the second setting position of the strain grating string and in combination with the material strain factor of the carbon slide plate, determine the wear thickness value of the carbon slide plate at the second setting position of the strain grating string; Based on the wear thickness values ​​of the carbon slide plate at each second setting position, the actual wear condition of the carbon slide plate is determined.

2. The estimation method according to claim 1, characterized in that In response to obtaining the first wavelength change of each temperature grating string in the temperature grating sensor, determining the temperature change value of the carbon slide plate at the first setting position of each temperature grating string includes: For each temperature grating string, in response to obtaining a first reflection wavelength output by the temperature grating string, combined with a first incident wavelength of incident light received by the temperature grating string, determining a first wavelength change amount generated when the incident light passes through a first setting position of the temperature grating string; Based on the first wavelength change, the thermal expansion coefficient of the temperature grating string and the initial Bragg wavelength of the temperature grating string, a temperature change value of the carbon slide plate at a first setting position of the temperature grating string is determined.

3. The estimation method according to claim 1, characterized in that The step of determining the stress change value of the carbon slide board at the second setting position of each strain grating in response to obtaining the second wavelength change value of each strain grating string in the strain grating sensor and combining the temperature change value of the carbon slide board comprises: For each strain grating string, in response to obtaining a second reflection wavelength output by the strain grating string, combined with a second incident wavelength of incident light received by the strain grating string, determining a second wavelength change amount generated when the incident light passes through a second setting position of the strain grating string; Based on the second wavelength change, the temperature change value of the carbon slide plate, the effective photoelastic coefficient and the initial Bragg wavelength, the stress change value of the carbon slide plate at the second setting position of the temperature grating string is determined.

4. The estimation method according to claim 1, characterized in that: The determining the actual wear condition of the carbon slide board based on the wear thickness value of the carbon slide board at each second setting position includes: Based on the wear thickness values ​​of the carbon slide plate at each second setting position, a wear space distribution diagram of the carbon slide plate is drawn to display the actual wear condition of the carbon slide plate through the wear space distribution diagram.

5. The estimation method according to claim 1, characterized in that: The estimation method further comprises: Based on the stress change value of the carbon slide board at the second setting position of each strain grating string and the accumulated usage time of the carbon slide board, the actual wear condition of the carbon slide board is determined by using a pre-trained wear estimation model and referring to the wear rate of the carbon slide board.

6. The estimation method according to claim 5, characterized in that: The wear estimation model is trained by the following steps: Obtain the sample strain value and wear condition label of each carbon skateboard sample at each historical cumulative time node; The pre-built linear fitting model is trained using the sample strain value and wear condition label of each carbon slide plate sample at each historical cumulative time node to determine the wear rate of the carbon slide plate over time, thereby obtaining a trained wear estimation model.

7. A data processor, characterized in that: The data processor comprises: A first temperature estimation module, configured to determine a temperature change score of the carbon slide board at a first setting position of each temperature grating string in response to obtaining a first wavelength change amount of each temperature grating string in the temperature grating sensor; wherein the temperature grating sensor is arranged on the carbon slide board; A second temperature estimation module, used for determining a temperature change value of the carbon slide board based on a temperature change score of the carbon slide board at a first setting position of each temperature grating string; A strain estimation module, for determining a stress change value of the carbon slide board at a second setting position of each strain grating string in response to obtaining a second wavelength change value of each strain grating string in the strain grating sensor and combining the temperature change value of the carbon slide board; wherein the strain grating sensor is arranged on the carbon slide board; A wear value determination module is used to determine, for each strain grating string, a wear thickness value of the carbon slide at the second setting position of the strain grating string based on the stress change value of the carbon slide at the second setting position of the strain grating string and in combination with the material strain factor of the carbon slide; The wear condition determination module is used to determine the actual wear condition of the carbon slide plate based on the wear thickness value of the carbon slide plate at each second setting position.

8. A carbon slide loss estimation system, characterized in that: The carbon slide plate loss estimation system comprises a carbon slide plate, a fiber Bragg grating demodulator and the data processor according to claim 7; A temperature grating sensor and a strain grating sensor are respectively arranged on two sides of the carbon slide plate; The fiber Bragg grating demodulator is communicatively connected with the temperature grating sensor and the strain grating sensor, and the fiber Bragg grating demodulator is used to measure the first wavelength variation generated by the temperature grating sensor and the second wavelength variation generated by the strain grating sensor; The data processor is used to determine the actual wear condition of the carbon slide plate based on the first wavelength change amount generated by the temperature grating sensor and the second wavelength change amount generated by the strain grating sensor.

9. The estimation system according to claim 8, characterized in that The temperature grating sensor includes a plurality of temperature grating strings; the plurality of temperature grating strings are respectively arranged at one-third, one-half and two-thirds of the carbon slide plate from the bottom to the top; The strain grating sensor includes a plurality of strain grating strings; the plurality of strain grating strings are respectively arranged at one third, one half and two thirds of the carbon slide plate from the bottom to the top.

10. The carbon slide estimation system according to claim 9, characterized in that: A plurality of grooves are arranged on both sides of the carbon slide plate, and the temperature grating sensor and the strain grating sensor are arranged in the grooves.

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