Torque detection method, system and device of valve, electronic equipment and storage medium

Abstract

The application provides a torque detection method, system and device of a valve, an electronic device and a storage medium. The method comprises: obtaining detection data of a valve to be detected, the detection data of the valve to be detected being detected by a fiber grating torque sensor installed on a valve stem of the valve to be detected; determining a first torque reference quantity of the valve to be detected based on the detection data and fiber grating torque sensor parameters of the fiber grating torque sensor; obtaining valve stem parameters of the valve stem, and determining a torque of the valve to be detected based on the valve stem parameters and the first torque reference quantity. Through the application, the torque detection accuracy of the valve stem can be effectively improved while ensuring normal operation of the valve stem.

Description

Technical Field

[0001] This application relates to the field of valve testing, and more particularly to a method, system, device, electronic equipment, and storage medium for testing the torque of a valve. Background Technology

[0002] In the energy and chemical industry, especially in the nuclear power sector, valves are critical components controlling the flow, direction, volume, pressure, and temperature of flammable, explosive, toxic, harmful, or corrosive media within pipelines. Their operational status is paramount. Faults such as jamming can cause significant economic losses and even casualties. Therefore, ensuring the continuous and reliable operation of valves is crucial for the safety of energy and chemical equipment. Among the many parameters closely related to valve operating status and overall performance, dynamically changing valve opening and closing torque is an important indicator. Achieving real-time, online, and accurate measurement of valve torque provides essential foundational data for valve design and manufacturing, and also offers strong technical support for preventative maintenance, thereby improving the safety and reliability of equipment operation.

[0003] In related technologies, torque detection of valve stems typically involves installing an electrical signal sensor between the output shaft of the electric actuator and the valve stem to directly measure the torque during the dynamic process of the valve stem. However, since electrical signal sensors are susceptible to electromagnetic interference, the accuracy of torque detection in these technologies is relatively low. Summary of the Invention

[0004] This application provides a method, system, device, electronic device, and storage medium for detecting the torque of a valve, which can effectively improve the accuracy of valve stem torque detection.

[0005] The technical solution of this application embodiment is implemented as follows: This application provides a method for detecting the torque of a valve, including: The detection data of the valve to be tested is obtained by a fiber optic grating torque sensor installed on the valve stem of the valve to be tested. Based on the detection data and the fiber optic grating torque sensor parameters, a first torque reference value for the valve to be detected is determined; Obtain the valve stem parameters and, based on the valve stem parameters and the first torque reference value, determine the torque of the valve to be tested.

[0006] This application provides a torque detection system for a valve, comprising: A valve, comprising a valve stem and a valve body, wherein the valve stem and the valve body are connected, and the valve stem is used to transmit an operating force to the valve body to control the closing of the valve; The valve stem includes a fiber Bragg grating torque sensor and a valve stem. The fiber Bragg grating torque sensor is mounted on the valve stem and is used to detect the detection data of the valve. A control mechanism, connected to the valve stem, is used to generate and transmit the operating force to the valve stem; A processing mechanism, connected to the fiber Bragg grating torque sensor, is used to receive and process the detection data detected by the fiber Bragg grating torque sensor when the valve stem is in motion, and to determine the torque of the valve based on the detection data.

[0007] In the above scheme, the fiber Bragg grating torque sensor includes: a first fiber Bragg grating torque sensor, which is mounted on the valve stem of the valve and encased in a metal protective shell, forming a positive 45-degree angle with the axial direction of the valve stem; and a second fiber Bragg grating torque sensor, which is mounted on the valve stem of the valve and encased in a metal protective shell, forming a negative 45-degree angle with the axial direction of the valve stem; the first and second fiber Bragg grating torque sensors have the same fiber Bragg grating torque sensor parameters, but their mounting positions on the valve stem are different.

[0008] In the above scheme, the torque detection system of the valve further includes: a demodulator, wherein the processing mechanism and the fiber optic torque sensor are connected through the demodulator; the demodulator is used to receive and preprocess the detection data detected by the fiber optic torque sensor when the valve stem is in the moving state, and send the preprocessed detection data to the processing mechanism to determine the torque.

[0009] This application provides a torque detection device for a valve, comprising: The detection module is used to acquire the detection data of the valve to be tested, which is obtained by a fiber optic grating torque sensor installed on the valve stem of the valve to be tested. The determination module is used to determine a first torque reference value for the valve to be detected based on the detection data and the fiber optic torque sensor parameters of the fiber optic torque sensor. The acquisition module is used to acquire the valve stem parameters of the valve stem to be tested, and determine the torque of the valve to be tested based on the valve stem parameters and the first torque reference value.

[0010] In the above scheme, the fiber Bragg grating torque sensor includes a first fiber Bragg grating torque sensor and a second fiber Bragg grating torque sensor. The detection module is further configured to receive first detection data sent by the first fiber Bragg grating torque sensor and receive second detection data sent by the second fiber Bragg grating torque sensor. The determination module is further configured to determine a first torque reference value of the valve to be tested based on at least one of the first detection data and the second detection data, and the parameters of the fiber Bragg grating torque sensor.

[0011] In the above scheme, the determining module is further configured to acquire the detection time of the detection data and determine the temperature influence factor of the valve to be tested at the detection time. The temperature influence factor is used to indicate whether the temperature will affect the detection of the fiber Bragg grating torque sensor. When the temperature influence factor indicates that the temperature will affect the detection of the fiber Bragg grating torque sensor, a first torque reference value of the valve to be tested is determined based on the first detection data, the second detection data, and the parameters of the fiber Bragg grating torque sensor. When the temperature influence factor indicates that the temperature will not affect the detection of the fiber Bragg grating torque sensor, a first torque reference value of the valve to be tested is determined based on either the first detection data or the second detection data, and the parameters of the fiber Bragg grating torque sensor.

[0012] In the above scheme, the determining module is further used to determine the difference between the first detection data and the second detection data, and to obtain the first coefficient of the fiber Bragg grating torque sensor parameter, multiply the first coefficient and the fiber Bragg grating torque sensor parameter to obtain the first fiber Bragg grating torque sensor parameter; and to determine the ratio of the difference to the first fiber Bragg grating torque sensor parameter as the first torque reference value of the valve to be detected.

[0013] In the above scheme, the determining module is further configured to determine either the first detection data or the second detection data as the target detection data, obtain the second coefficient of the fiber Bragg grating torque sensor parameter, multiply the second coefficient and the fiber Bragg grating torque sensor parameter to obtain the second fiber Bragg grating torque sensor parameter, and determine the ratio of the target detection data and the second fiber Bragg grating torque sensor parameter as the first torque reference value of the valve to be detected.

[0014] In the above scheme, the valve stem parameters include the shear modulus of the valve stem material and the diameter of the valve stem at a target position, where the target position is the installation position of the fiber optic torque sensor on the valve stem. The acquisition module is further configured to determine the product of the shear modulus, the diameter, and pi as a second torque reference value, and to determine the product of the first torque reference value and the second torque reference value as the torque of the valve to be detected.

[0015] This application provides an electronic device, including: Memory is used to store executable instructions or computer programs. The processor, when executing computer-executable instructions or computer programs stored in the memory, implements the torque detection method for valves provided in the embodiments of this application.

[0016] This application provides a computer-readable storage medium storing computer-executable instructions for inducing a processor to execute and implement the valve torque detection method provided in this application.

[0017] This application provides a computer program product, which includes a computer program or computer-executable instructions stored in a computer-readable storage medium. The processor of an electronic device reads the computer-executable instructions from the computer-readable storage medium and executes the computer-executable instructions, causing the electronic device to perform the valve torque detection method described above in this application.

[0018] The embodiments of this application have the following beneficial effects: By acquiring the detection data of the valve under test—data obtained from a fiber Bragg grating torque sensor mounted on the valve stem—a first torque reference value for the valve is determined based on the detection data and the sensor's parameters. The valve stem parameters are then acquired, and the torque of the valve is determined based on these parameters and the first torque reference value. Thus, torque determination relies not only on the fiber Bragg grating torque sensor's detection data but also on the valve stem's physical parameters (such as shear modulus and diameter). These parameters are used to calculate and correct the torque value, improving the accuracy of the measurement results. By acquiring the valve stem's detection data during dynamic processes, torque changes can be monitored in real time. This ensures the valve stem functions normally even under extreme torque conditions. The use of the fiber Bragg grating torque sensor's parameters helps calibrate the sensor, reducing errors and ensuring accurate and reliable torque measurement even under different operating conditions. By directly mounting a fiber Bragg grating torque sensor on the valve stem and combining the sensor's parameters with the valve stem's physical parameters to determine the torque, a method that provides higher accuracy and reliability in torque detection without sacrificing the valve stem's normal operating capability is achieved. This is because the fiber Bragg grating torque sensor is unaffected by electromagnetic interference. This ensures the safety of the valve stem under various operating conditions and effectively improves the accuracy of torque detection. Attached Figure Description

[0019] Figure 1 This is a schematic diagram of the architecture of the torque detection system provided in the embodiments of this application; Figure 2 This is a schematic diagram of the structure of an electronic device for detecting torque provided in an embodiment of this application; Figure 3 This is a flowchart illustrating the torque detection method for valves provided in the embodiments of this application. Figure 1 ; Figure 4 This is a flowchart illustrating the torque detection method for valves provided in the embodiments of this application. Figure 2 ; Figure 5 This is a schematic diagram of the valve stem structure provided in the embodiments of this application. Figure 1 ; Figure 6 The structural schematic diagram of the valve stem provided in the embodiments of this application Figure 2 ; Figure 7 This is a schematic diagram of the valve torque detection system provided in the embodiments of this application; Figure 8 This is a graph showing the change of the center wavelength of the fiber optic grating torque sensor provided in this embodiment over time. Figure 9This is a schematic diagram showing the relationship between the center wavelength of the fiber optic grating torque sensor and the valve stem torque provided in this application embodiment. Detailed Implementation

[0020] To make the objectives, technical solutions, and advantages of this application clearer, the application will be further described in detail below with reference to the accompanying drawings. The described embodiments should not be regarded as limitations on this application. All other embodiments obtained by those skilled in the art without creative effort are within the scope of protection of this application.

[0021] In the following description, references are made to “some embodiments,” which describe a subset of all possible embodiments. However, it is understood that “some embodiments” may be the same subset or different subsets of all possible embodiments and may be combined with each other without conflict.

[0022] In the following description, the terms "first, second, third" are used merely to distinguish similar objects and do not represent a specific ordering of objects. It is understood that "first, second, third" may be interchanged in a specific order or sequence where permitted, so that the embodiments of this application described herein can be implemented in an order other than that illustrated or described herein.

[0023] Unless otherwise defined, all technical and scientific terms used herein have the same meaning as commonly understood by one of ordinary skill in the art to which this application belongs. The terminology used herein is for the purpose of describing embodiments of this application only and is not intended to limit this application.

[0024] Before providing a further detailed description of the embodiments of this application, the nouns and terms involved in the embodiments of this application will be explained, and the nouns and terms involved in the embodiments of this application shall be interpreted as follows.

[0025] 1) Torque: Torque is the moment generated by an external force or load acting on a component, causing the component to undergo torsional deformation around a fixed axis. It is the product of the force and the distance from the point of application of the force to the center of rotation (or lever arm), and is usually represented by the symbol... T Torque is expressed as a unit of measurement in the International System of Units (SI). Specifically, torque is equal to the magnitude of the force applied multiplied by the length of the lever arm. Common examples of torque in everyday life include the torque exerted when tightening a screw with a wrench, or the torque output from an engine to the crankshaft.

[0026] 2) Valves: A valve is a fluid control device used to open or close the flow of fluid in a piping system, or to regulate the flow rate and direction of fluid. Valves can be fully open or fully closed as needed, or in an intermediate position to regulate flow. Valves are widely used in various industrial and civil applications, such as water supply, gas transmission, and chemical production.

[0027] 3) Valve Stem: The valve stem is an important component of a valve. It is typically a slender, protective metal rod that passes through the sealing part of the valve body and connects to the valve's operating device (such as a handwheel or electric actuator). The main function of the valve stem is to transmit operating force to the valve body, driving the valve to open or close. During operation, the valve stem needs to maintain good sealing performance to prevent media leakage.

[0028] 4) Valve Body: The valve body refers to the main part of the valve, which is the load-bearing structure and includes key components such as the valve seat, valve disc (or valve plate), and seals. The valve body is usually made of a metal protective shell (such as cast iron, stainless steel, etc.) or other corrosion-resistant materials to adapt to different working media and pressure conditions. The design of the valve body determines the valve's function and performance, such as the tightness of closure, pressure resistance, and corrosion resistance. The valve stem is connected to the valve body; through the movement of the valve stem, the valve disc or valve plate of the valve body moves, thereby realizing the function of opening or closing the fluid.

[0029] 5) Fiber Bragg Grating Demodulator: A fiber Bragg grating demodulator is an instrument used to read and analyze signals acquired by fiber Bragg grating torque sensors. Fiber Bragg grating torque sensors modulate the Bragg wavelength of the fiber Bragg grating using external physical parameters (such as temperature, strain, and pressure), thereby generating wavelength changes related to the measured physical quantity. The function of the fiber Bragg grating demodulator is to accurately measure these wavelength changes and convert them into electrical or digital signals for subsequent data processing and analysis. It typically includes a light source, wavelength detector, and signal processor, enabling real-time monitoring and acquisition of signals from multiple fiber Bragg grating torque sensors.

[0030] 6) Fiber Bragg Grating Torque Sensor: A fiber Bragg grating torque sensor is a mechanical measurement device developed based on fiber Bragg grating technology. It measures torque (torsional moment) by detecting the change in the Bragg wavelength of the grating as a function of torsional deformation. This type of fiber Bragg grating torque sensor typically uses a special grating structure written into an optical fiber. When the measured component is subjected to torque, the fiber deforms, causing changes in the grating's period and effective refractive index, thus resulting in a change in the Bragg wavelength. This wavelength change is proportional to the magnitude of the torque; therefore, torque can be accurately measured by detecting the change in the Bragg wavelength. Due to its advantages such as high sensitivity, resistance to electromagnetic interference, small size, and corrosion resistance, fiber Bragg grating torque sensors are widely used in aerospace, automotive manufacturing, and robotics control.

[0031] During the implementation of the embodiments of this application, the applicant discovered the following problems with the related technology: In related technologies, torque detection of valve stems typically involves installing an electrical signal sensor between the output shaft of the electric actuator and the valve stem to directly measure the torque during the dynamic process of the valve stem. However, this method not only alters the original equipment structure but also results in low accuracy in torque detection due to the susceptibility of the electrical signal sensor to electromagnetic interference.

[0032] This application provides a method, system, device, electronic device, computer-readable storage medium, and computer program product for detecting the torque of a valve. These methods and devices can effectively improve the accuracy of valve stem torque detection while ensuring the normal operation of the valve stem. The exemplary application of the valve torque detection system provided in this application is described below.

[0033] See Figure 1 , Figure 1 This is a schematic diagram of the architecture of the torque detection system 100 provided in the embodiments of this application. The terminal (terminal 400 is shown as an example) connects to the server 200 through the network 300. The network 300 can be a wide area network or a local area network, or a combination of the two.

[0034] Terminal 400 is used by a user to access client 410 and display the torque of the valve to be detected on a graphical interface 410-1 (graphical interface 410-1 is shown as an example). Terminal 400 and server 200 are interconnected via wired or wireless network.

[0035] In some embodiments, server 200 can be a standalone physical server, a server cluster or business system composed of multiple physical servers, or a cloud server providing basic cloud computing services such as cloud services, cloud databases, cloud computing, cloud functions, cloud storage, network services, cloud communication, middleware services, domain name services, security services, content delivery networks (CDNs), and big data and artificial intelligence platforms. Terminal 400 can be a smartphone, tablet, laptop, desktop computer, smart speaker, smart TV, smartwatch, in-vehicle terminal, etc., but is not limited to these. The electronic device provided in this application embodiment can be implemented as a terminal or a server. The terminal and server can be directly or indirectly connected via wired or wireless communication, which is not limited in this application embodiment.

[0036] See Figure 2 , Figure 2 This is a schematic diagram of the structure of an electronic device 500 for detecting torque provided in an embodiment of this application, wherein, Figure 2 The electronic device 500 shown can be Figure 1 Server 200 or terminal 400 in the middle, Figure 2The illustrated electronic device 500 includes at least one processor 430, a memory 450, and at least one network interface 420. The various components in the electronic device 500 are coupled together via a bus system 440. It is understood that the bus system 440 is used to implement communication between these components. In addition to a data bus, the bus system 440 also includes a power bus, a control bus, and a status signal bus. However, for clarity, ... Figure 2 The general labeled all buses as Bus System 440.

[0037] Processor 430 can be an integrated circuit chip with signal processing capabilities, such as a general-purpose processor, a digital signal processor (DSP), or other programmable logic devices, discrete gate or transistor logic devices, discrete hardware components, etc. Among them, the general-purpose processor can be a microprocessor or any conventional processor, etc.

[0038] The memory 450 may be removable, non-removable, or a combination thereof. Exemplary hardware devices include solid-state storage, hard disk drives, optical disk drives, etc. The memory 450 may optionally include one or more storage devices physically located away from the processor 430.

[0039] The memory 450 may include volatile memory or non-volatile memory, or both. The non-volatile memory may be read-only memory (ROM), and the volatile memory may be random access memory (RAM). The memory 450 described in this application embodiment is intended to include any suitable type of memory.

[0040] In some embodiments, memory 450 is capable of storing data to support various operations, examples of which include programs, modules, and data structures or subsets or supersets thereof, as illustrated below.

[0041] Operating system 451 includes system programs for handling various basic system services and performing hardware-related tasks, such as the framework layer, core library layer, driver layer, etc., for implementing various basic business functions and handling hardware-based tasks; The network communication module 452 is used to reach other electronic devices via one or more (wired or wireless) network interfaces 420, such as Bluetooth, WiFi, and Universal Serial Bus.

[0042] In some embodiments, the torque detection device for the valve provided in this application can be implemented in software. Figure 2 A torque detection device 455 for a valve, stored in memory 450, is shown. This device can be software in the form of programs or plug-ins, and includes the following software modules: a detection module 4551, a determination module 4552, and an acquisition module 4553. These modules are logically linked and can therefore be arbitrarily combined or further separated depending on the functions they implement. The functions of each module will be described below.

[0043] In other embodiments, the torque detection device for valves provided in this application can be implemented in hardware. As an example, the torque detection device for valves provided in this application can be a processor in the form of a hardware decoding processor, which is programmed to execute the torque detection method for valves provided in this application. For example, the processor in the form of a hardware decoding processor can be one or more application-specific integrated circuits (ASICs), DSPs, programmable logic devices (PLDs), complex programmable logic devices (CPLDs), field-programmable gate arrays (FPGAs), or other electronic components.

[0044] In some embodiments, the terminal or server can implement the valve torque detection method provided in this application by running a computer program or computer-executable instructions. For example, the computer program can be a native program in the operating system (e.g., a dedicated detection program) or a software module, such as a detection module that can be embedded in any program (e.g., an instant messaging client, a photo album program, an electronic map client, a navigation client); for example, it can be a native application (APP), i.e., a program that needs to be installed in the operating system to run. In summary, the above-mentioned computer program can be any form of application, module, or plugin.

[0045] The torque detection method for valves provided in this application will be described in conjunction with exemplary applications and implementations of the server or terminal provided in the embodiments of this application.

[0046] See Figure 3 , Figure 3 This is a flowchart illustrating the torque detection method for valves provided in the embodiments of this application. Figure 1 , will combine Figure 3Steps 101 to 103 are described below. The torque detection method for valves provided in this application embodiment can be implemented by the server or terminal alone, or by the server and terminal working together. The following description will take the implementation by the server alone as an example.

[0047] In step 101, the detection data of the valve to be tested is obtained.

[0048] In some embodiments, the detection data of the valve to be tested is obtained by a fiber optic grating torque sensor installed on the valve stem of the valve to be tested.

[0049] In some embodiments, the detection data may include valve stem motion data, including valve stem displacement, velocity, and acceleration, which reflect the opening and closing motion of the valve. Torque data: Measures the torque applied to the valve stem, a key parameter driving the valve to open or close. Stress data: The stress distribution on the valve stem under stress, reflecting the strength and integrity of the valve stem, calculated from the torque data. Vibration data: The vibration of the valve stem and valve assembly during operation, which may indicate system imbalance or potential faults.

[0050] In some embodiments, the fiber Bragg grating torque sensor includes a first fiber Bragg grating torque sensor and a second fiber Bragg grating torque sensor. Step 101 can be implemented as follows: receiving first detection data sent by the first fiber Bragg grating torque sensor and receiving second detection data sent by the second fiber Bragg grating torque sensor.

[0051] In some embodiments, the first and second fiber Bragg grating torque sensors described above are fiber Bragg grating torque sensors, a novel type of fiber Bragg grating torque sensor based on fiber Bragg grating technology. It utilizes changes in the reflection or transmission characteristics of light by the fiber Bragg grating to sense changes in external environmental parameters. Fiber Bragg grating torque sensors feature strong anti-interference capabilities and high sensitivity, and can determine torque changes by detecting the center wavelength shift.

[0052] In some embodiments, the first detection data is obtained by a first fiber Bragg grating torque sensor mounted on the valve stem. This fiber Bragg grating torque sensor may be used to measure a specific physical quantity of the valve stem, such as temperature, pressure, or stress. The second detection data is obtained by a second fiber Bragg grating torque sensor mounted on the valve stem. This fiber Bragg grating torque sensor may also be used to measure a different physical quantity than that measured by the first fiber Bragg grating torque sensor, or for redundant monitoring to increase the reliability of the system.

[0053] In some embodiments, for acquiring the first detection data, the first fiber Bragg grating torque sensor is a fiber Bragg grating torque sensor installed at the drive end of the valve stem to measure the torque generated when the valve stem rotates. When the valve stem rotates and torque is applied, the fiber Bragg grating undergoes a slight deformation, which causes a shift in its center wavelength. A fiber Bragg grating, with a wavelength-selective reflection structure formed in the fiber core through periodic refractive index modulation, reflects light of a specific wavelength according to the applied torque. A fiber Bragg grating reflection photodetector is used to receive the reflected light signal from the grating and convert it into an electrical signal, thereby obtaining the center wavelength based on the resulting discrete spectrum or waveform, which is then recorded by a data acquisition system. The recorded center wavelength shift is used as the first detection data to determine the torque value of the valve stem at a specific time point.

[0054] In some embodiments, for acquiring the second detection data, the second fiber Bragg grating torque sensor is another fiber Bragg grating torque sensor mounted on the valve stem to provide redundant torque measurement or to eliminate temperature effects. Similar to the first fiber Bragg grating torque sensor, the second fiber Bragg grating torque sensor also records the center wavelength shift caused by the torque as the valve stem rotates. The reflected light signal from the second fiber Bragg grating is received using a fiber Bragg grating reflective photodetector and converted into an electrical signal. The center wavelength is then obtained from the resulting discrete spectrum or waveform and recorded by the data acquisition system. The recorded center wavelength shift is the second detection data, used to determine the torque value of the valve stem at another position or time point.

[0055] In step 102, based on the detection data and the fiber Bragg grating torque sensor parameters of the fiber Bragg grating torque sensor, a first torque reference value for the valve to be detected is determined.

[0056] In some embodiments, fiber Bragg grating torque sensor parameters refer to a series of values ​​or characteristics that define and describe the performance features of the fiber Bragg grating torque sensor during its design and use. In this example, the fiber Bragg grating torque sensor parameter refers to the strain sensitivity of the fiber Bragg grating torque sensor. Strain sensitivity is an important parameter of the fiber Bragg grating torque sensor, describing the degree to which the output signal of the fiber Bragg grating torque sensor responds to changes in strain. Strain sensitivity is typically expressed as the output change per unit strain. The role of strain sensitivity is that it determines the fiber Bragg grating torque sensor's ability to detect strain changes on the valve stem. A highly sensitive fiber Bragg grating torque sensor can detect minute strain changes, which is crucial for accurately measuring valve stem torque. Torque calculation is performed by dividing the detected strain data (center wavelength offset) by the strain sensitivity of the fiber Bragg grating torque sensor, yielding a quantity proportional to the torque. This quantity can be considered a reference value for the torque, as it reflects the torque experienced by the valve stem.

[0057] In some embodiments, the strain sensitivity of a fiber Bragg grating torque sensor is a key parameter, describing how responsive the sensor's output signal is to changes in strain. Strain sensitivity is the ratio of the change in the fiber Bragg grating torque sensor's output signal to the detected change in strain. This ratio is typically expressed as the output change per microstrain (με). For example, a strain sensitivity of 1 pm / με means that for every microstrain increase, the output optical signal of the fiber Bragg grating torque sensor will change by 1 picometer (pm). The calculation of strain sensitivity is usually based on the physical properties of the fiber Bragg grating, including its period, material properties (such as the elastic-optical coefficient), and the geometry of the fiber Bragg grating torque sensor. In practical applications, strain sensitivity can be determined through a calibration process, i.e., by applying a known amount of strain and measuring the corresponding change in the output signal. Fiber Bragg gratings made of different materials have different elastic-optical coefficients, which affect strain sensitivity. The packaging method of the fiber Bragg grating torque sensor also affects its strain sensitivity. Strain sensitivity is a key indicator of the fiber Bragg grating torque sensor's ability to measure torque. By measuring the center wavelength offset, and based on the strain sensitivity of the fiber Bragg grating, the center wavelength offset is converted into strain. Then, based on the shear modulus of the valve stem material and the valve stem diameter, this is converted into the torque borne by the valve stem or other mechanical components. Strain sensitivity is crucial for evaluating the performance of fiber Bragg grating torque sensors. High-sensitivity fiber Bragg grating torque sensors can detect smaller strain changes, which is essential for applications requiring high-precision measurements. Strain sensitivity is used in the calibration and verification process of fiber Bragg grating torque sensors to ensure that the output of the fiber Bragg grating torque sensor is proportional to the actual strain. The strain sensitivity of a fiber Bragg grating torque sensor is a parameter describing how responsive the sensor is to strain changes; it is the basis of torque measurement. By accurately measuring strain and utilizing strain sensitivity, fiber Bragg grating torque sensors can provide high-precision torque data, which is crucial for monitoring the health of mechanical components, optimizing operation, and ensuring system safety.

[0058] In some embodiments, step 102 above can be implemented as follows: based on at least one of the first detection data and the second detection data, and the parameters of the fiber optic torque sensor, a first torque reference value of the valve to be detected is determined.

[0059] In some embodiments, see Figure 4 , Figure 4 This is a flowchart illustrating the torque detection method for valves provided in the embodiments of this application. Figure 2 , Figure 3 Step 102 shown can be achieved through Figure 4 Steps 1021 to 1023 shown are implemented.

[0060] In step 1021, the detection time of the detection data is obtained, and the temperature influence factor of the valve to be detected is determined at the detection time.

[0061] In some embodiments, the temperature influence factor is used to indicate whether temperature affects the detection of the fiber Bragg grating torque sensor.

[0062] In some embodiments, the temperature influence factor is used to indicate whether temperature affects the detection of the first fiber Bragg grating torque sensor and the second fiber Bragg grating torque sensor.

[0063] In some embodiments, by acquiring the detection times of the first and second detection data and determining the temperature influence factor, it is helpful to assess whether temperature changes have affected the measurement results of the fiber Bragg grating torque sensor. The detection time refers to the precise point in time when the first and second fiber Bragg grating torque sensors acquire the first and second detection data. This point in time is typically recorded synchronously by the data acquisition system to ensure synchronization with the clock of the data acquisition card, and that the detection times of the first and second detection data are the same.

[0064] In some embodiments, the detection time can be determined in the following ways: Timestamp synchronization: ensuring that the timestamps of all fiber Bragg grating torque sensors and data acquisition systems are synchronized, typically achieved through a central clock or Network Time Protocol (NTP). Real-time acquisition: the data acquisition system records data and timestamps in real time when the fiber Bragg grating torque sensor detects a change in the physical quantity. Log recording: data and timestamps are recorded in a data log for subsequent analysis.

[0065] In some embodiments, a temperature influence factor is used to assess whether temperature changes significantly affect the measurement results of the first and second fiber Bragg grating torque sensors. The method for determining the temperature influence factor is described below: Temperature measurement is performed by recording the valve stem temperature at the detection moment, typically using an additional temperature fiber Bragg grating torque sensor. Fiber Bragg grating torque sensor temperature response analysis is conducted to understand and evaluate the sensitivity of each fiber Bragg grating torque sensor to temperature changes. Fiber Bragg grating torque sensors typically have some response to temperature changes, but this may affect their accuracy in measuring other physical quantities. Data comparison analysis compares the temperature changes by comparing the valve stem temperature at the detection moment with the response of the fiber Bragg grating torque sensors under standard conditions. The deviation of the readings of the first and second fiber Bragg grating torque sensors during temperature changes is checked to see if it exceeds their error range or a pre-set threshold. Based on the above analysis, a temperature influence factor can be calculated. For example, if the effect of temperature changes on the fiber Bragg grating torque sensor readings is small, the temperature influence factor may be close to 1, indicating that the effect of temperature on the measurement results is negligible. If temperature changes significantly affect the readings of the fiber Bragg grating torque sensor, the temperature influence factor will deviate from 1, indicating that temperature correction is needed for the measurement results. If the temperature influence factor indicates that temperature has a significant impact on the fiber Bragg grating torque sensor readings, temperature correction is required for the data, and then verification is performed by comparing the corrected data with expected values ​​or historical data.

[0066] In some embodiments, the temperature influence factor is a parameter or coefficient used to assess the degree of influence of temperature changes on the measurement results of a fiber Bragg grating torque sensor under certain conditions. The temperature influence factor is a parameter used to measure the degree of influence of temperature changes on the accuracy of the detection data of the fiber Bragg grating torque sensor. It can indicate whether the temperature will affect the measurement results of the fiber Bragg grating torque sensor at a specific detection time, thereby guiding necessary adjustments to ensure the accuracy of the data.

[0067] In step 1022, when the temperature influence factor indicates that the temperature will affect the detection of the fiber Bragg grating torque sensor, a first torque reference value of the valve to be detected is determined based on the first detection data, the second detection data, and the parameters of the fiber Bragg grating torque sensor.

[0068] In some embodiments, when temperature affects the detection of a fiber Bragg grating torque sensor, this means that temperature changes will affect the output of the fiber Bragg grating torque sensor, potentially leading to inaccurate torque measurements. In this case, it is necessary to consider the temperature influence factor and adjust the torque measurement results based on the first detection data, the second detection data, and the fiber Bragg grating torque sensor parameters to obtain a more accurate first torque reference value. The temperature influence factor refers to the degree of interference of temperature changes on the output signal of the fiber Bragg grating torque sensor. Different fiber Bragg grating torque sensor materials and designs have different sensitivities to temperature; therefore, in practical applications, it is necessary to evaluate the impact of temperature on the output of the fiber Bragg grating torque sensor.

[0069] In some embodiments, step 1022 above can be implemented as follows: determine the difference between the first detection data and the second detection data, and obtain the first coefficient of the fiber Bragg grating torque sensor parameter; multiply the first coefficient and the fiber Bragg grating torque sensor parameter to obtain the first fiber Bragg grating torque sensor parameter; and determine the ratio of the difference to the first fiber Bragg grating torque sensor parameter as the first torque reference value of the valve to be detected.

[0070] In some embodiments, the temperature influence factor is an indicator used to indicate whether the current temperature will affect the detection of the fiber Bragg grating torque sensor. If the temperature influence factor indicates that temperature will affect the detection of the fiber Bragg grating torque sensor, then special processing methods are required to ensure the accuracy of torque measurement. When temperature influence exists, the difference between the first detection data and the second detection data needs to be determined first. The first and second detection data can refer to data collected by two fiber Bragg grating torque sensors (e.g., a first fiber Bragg grating torque sensor and a second fiber Bragg grating torque sensor). Next, a first coefficient of the fiber Bragg grating torque sensor parameter needs to be obtained. This coefficient is related to the characteristics of the fiber Bragg grating torque sensor, possibly strain sensitivity or other torque measurement-related parameters. Multiplying the obtained first coefficient by the fiber Bragg grating torque sensor parameter yields the so-called first fiber Bragg grating torque sensor parameter. This parameter is used to adjust the detection data to more accurately reflect the actual torque. A first torque reference value for the valve to be detected is calculated. This is achieved by dividing the calculated difference by the obtained first fiber Bragg grating torque sensor parameter to obtain a ratio. This ratio is determined as the first torque reference value for the valve to be tested. The first torque parameter is obtained by measuring the maximum normal strain on the surface of the torsion member using a fiber optic torque sensor, and combining it with the shear modulus of the valve stem material and the valve stem diameter, through the strain-torque conversion relationship.

[0071] As an example, the expression for the first torque reference value mentioned above can be: (1) in, t Used to indicate the first torque reference value Used to indicate parameters of fiber Bragg grating torque sensor Used to indicate the first coefficient, Used to indicate the first detection data. Used to indicate the second detection data.

[0072] Thus, by utilizing the difference between the first and second detection data, combined with the first coefficient of the fiber Bragg grating torque sensor parameters, when temperature affects the detection of the fiber Bragg grating torque sensor, the interference of temperature changes on torque measurement can be effectively eliminated. This improves the accuracy and stability of torque measurement, facilitating more precise monitoring and adjustment of valve operation and ensuring stable valve operation under fluctuating temperature conditions. Simultaneously, this method reduces the impact of temperature changes on the output signal of the fiber Bragg grating torque sensor, lowering the risk of system failure and improving system reliability and safety. Furthermore, by calculating the ratio of the difference to the fiber Bragg grating torque sensor parameters, the obtained torque reference value is closer to the actual torque value, helping to optimize valve control strategies, improve energy efficiency, and reduce operating costs.

[0073] In step 1023, when the temperature influence factor indicates that the temperature will not affect the detection of the fiber Bragg grating torque sensor, a first torque reference value of the valve to be detected is determined based on either the first detection data or the second detection data, and the parameters of the fiber Bragg grating torque sensor.

[0074] In some embodiments, step 1023 above can be implemented as follows: either the first detection data or the second detection data is determined as the target detection data, and a second coefficient of the fiber Bragg grating torque sensor parameter is obtained; the second coefficient is multiplied by the fiber Bragg grating torque sensor parameter to obtain a second fiber Bragg grating torque sensor parameter; the ratio of the target detection data to the second fiber Bragg grating torque sensor parameter is determined as the first torque reference value of the valve to be detected.

[0075] In some embodiments, when temperature has no effect on the detection of the fiber Bragg grating torque sensor, a simplified method can be used to determine the torque reference value of the valve to be tested. Since temperature does not affect the detection of the fiber Bragg grating torque sensor, either the first detection data or the second detection data can be selected as the target detection data. This selection may be based on the calibration data of the fiber Bragg grating torque sensor, the performance characteristics of the fiber Bragg grating torque sensor, or the availability of data. The second coefficient is a parameter related to the torque measurement characteristics of the fiber Bragg grating torque sensor, which may be strain sensitivity or other relevant conversion factors. It describes the relationship between the output signal of the fiber Bragg grating torque sensor and the actual torque. Multiplying the second coefficient by the fiber Bragg grating torque sensor parameter yields the second fiber Bragg grating torque sensor parameter. This parameter is used to convert the detected signal into an actual torque value. Dividing the target detection data by the second fiber Bragg grating torque sensor parameter yields the first torque reference value of the valve to be tested, which directly reflects the actual torque on the valve stem.

[0076] As an example, the expression for the first torque reference value mentioned above can be: (2) in, t Used to indicate the first torque reference value Used to indicate parameters of fiber Bragg grating torque sensor Used to indicate the second coefficient, Used to indicate the second or first detection data.

[0077] Thus, when temperature has no effect on the detection of the fiber Bragg grating torque sensor, the advantage of simplified torque measurement lies in its ability to quickly and directly provide a torque reference value, eliminating the need for temperature correction and thereby improving the efficiency and accuracy of the measurement process. By selecting any detection data as the target detection data and combining it with the second coefficient of the fiber Bragg grating torque sensor parameters, the torque reference value can be quickly calculated, providing immediate data support for valve monitoring and control. This method reduces the complexity of system design and operation, reduces potential sources of error, and improves the overall reliability of the system. Therefore, when the temperature is stable or the effect of temperature changes on the output of the fiber Bragg grating torque sensor is negligible, the accuracy of torque measurement can be effectively guaranteed, and it helps to optimize valve operation and maintenance, improving system performance.

[0078] Therefore, by acquiring the detection time of the detection data and determining the temperature influence factor of the valve under test, the impact of temperature on the detection of the fiber Bragg grating torque sensor can be effectively evaluated. When the temperature influence factor indicates that temperature will affect the detection of the fiber Bragg grating torque sensor, the torque reference value can be determined by using a method based on the first detection data, the second detection data, and the parameters of the fiber Bragg grating torque sensor. This eliminates the error caused by temperature changes, thereby improving the accuracy of torque measurement. This method ensures that the monitoring and control of valve operation remains highly accurate even in environments with large temperature variations. When the temperature influence factor indicates that temperature will not affect the detection of the fiber Bragg grating torque sensor, the torque reference value can be determined by using a method based on the first or second detection data and the parameters of the fiber Bragg grating torque sensor. This simplifies the calculation process and improves the efficiency of data processing. This method not only ensures the accuracy of torque measurement but also reduces the complexity of system design and operation, reduces potential sources of error, and improves the overall reliability of the system. Therefore, regardless of whether the temperature influence exists or not, by acquiring the detection time and temperature influence factor in real time and using the appropriate torque measurement method, the accuracy, efficiency, and reliability of torque measurement can be effectively guaranteed, providing accurate data support for valve monitoring and control and improving system performance.

[0079] In step 103, the valve stem parameters of the valve stem are obtained, and the torque of the valve to be tested is determined based on the valve stem parameters and the first torque reference value.

[0080] In some embodiments, the valve stem parameters mentioned above include the shear modulus of the valve stem material and the diameter of the valve stem at a target location, where the target location is the mounting position of the fiber optic torque sensor on the valve stem.

[0081] In some embodiments, shear modulus, stem diameter, and pi are key parameters for calculating the stem torsional angle and torque in torque measurement. Shear modulus is a physical property of a material that describes its response to shear stress; it is a constant and fixed for a given material. Stem diameter is the diameter of the stem at the mounting location of the fiber Bragg grating torque sensor. This parameter is an important dimension for torque calculation. Pi (π) is a mathematical constant, approximately 3.14159, used to calculate the circumference and area of ​​a circle.

[0082] In some embodiments, step 103 above can be implemented as follows: the product of the shear modulus, the diameter, and pi is determined as a second torque reference value, and the product of the first torque reference value and the second torque reference value is determined as the torque of the valve to be tested.

[0083] In some embodiments, the shear modulus (G ), valve stem diameter ( d Multiplying the first torque reference value by π (pi) yields a parameter called the second torque reference value. Multiplying the first torque reference value by the second torque reference value gives the torque of the valve to be tested. The first torque reference value may be a torque value directly measured or indirectly calculated by a fiber optic torque sensor, while the second torque reference value is a torque coefficient related to the valve stem material and size.

[0084] As an example, the expression for the torque of the valve to be detected above can be: (3) in, Used to indicate the torque of the valve under test. Used to indicate shear modulus. Used to indicate the diameter of the valve to be tested. Used to indicate the first torque reference value.

[0085] As an example, the expression for the torque of the valve to be detected above can be: (4) in, Used to indicate the torque of the valve under test. Used to indicate shear modulus. Used to indicate the diameter of the valve to be tested. Used to indicate the first torque reference value.

[0086] As an example, in an industrial piping system, a valve needs to have its opening and closing torque monitored. A fiber Bragg grating torque sensor is installed on the valve stem. When the valve is operated (e.g., opening or closing), the fiber Bragg grating torque sensor detects torque data on the valve stem in real time. The detected data is transmitted to the control system via the fiber Bragg grating torque sensor. The control system receives the fiber Bragg grating torque sensor data and adjusts the detected data using the fiber Bragg grating torque sensor parameters (such as strain sensitivity). Based on the fiber Bragg grating torque sensor data, a first torque reference value is determined. Valve stem parameters, including the shear modulus of elasticity of the material, are acquired. G and the diameter at the target location D Calculate the valve torque using the valve stem parameters and the first torque reference value.

[0087] As an example, consider the exhaust pipe valve control in an automotive engine. A valve used to regulate exhaust flow requires precise control. A fiber Bragg grating torque sensor is installed on the valve stem of the exhaust pipe valve. When the engine is running, the fiber Bragg grating torque sensor detects torque changes during the valve's opening and closing process. The detected data is transmitted to the engine control unit (ECU) via the fiber Bragg grating torque sensor. The ECU receives the data and processes it using the sensor's parameters. Based on the fiber Bragg grating torque sensor data, a first torque reference value is determined, and the valve stem parameters, including the shear modulus and diameter at the target location, are obtained. Using the valve stem parameters and the first torque reference value, the valve torque is calculated.

[0088] Thus, by acquiring the detection data of the valve under test, which is obtained through a fiber optic torque sensor mounted on the valve stem, a first torque reference value for the valve is determined based on the detection data and the parameters of the fiber optic torque sensor. The valve stem parameters are then acquired, and the torque of the valve under test is determined based on these parameters and the first torque reference value. The fiber optic torque sensor is directly mounted on the valve stem, rather than between the output shaft of the electric actuator and the valve stem, avoiding the need for an additional sensor between them, reducing installation complexity and space occupation on the valve stem. Since the fiber optic torque sensor is directly mounted on the valve stem, no additional installation space or structural support is required, thus reducing torque detection accuracy issues caused by physical strength limitations. In addition to relying on the detection data from the fiber optic torque sensor, the measurement also incorporates the physical parameters of the valve stem (such as shear modulus and diameter), which are used to calculate and correct the torque value, improving the accuracy of the measurement results. By acquiring detection data of the valve stem during dynamic processes, torque changes can be monitored in real time, which is crucial for ensuring the valve stem continues to function normally under extreme torque conditions. Utilizing the parameters of a fiber Bragg grating torque sensor helps calibrate the sensor, reducing errors and ensuring accurate and reliable torque measurement even under varying operating conditions. A method that determines torque by directly mounting a fiber Bragg grating torque sensor on the valve stem and combining its parameters with the valve stem's physical parameters provides higher accuracy and reliability in torque detection without sacrificing the valve stem's normal operating capability. This method expands the application scenarios of torque detection, enabling it to adapt to a wider torque range while ensuring the safety of the valve stem under various operating conditions, thus effectively improving the accuracy of valve stem torque detection while ensuring normal valve stem operation.

[0089] In some embodiments, see Figure 5 and Figure 6 , Figure 5 This is a schematic diagram of the valve stem structure provided in the embodiments of this application. Figure 1 , Figure 6 The structural schematic diagram of the valve stem provided in the embodiments of this application Figure 2 The valve torque detection system includes: a valve, the valve comprising a valve stem 3 and a valve body, the valve stem 3 being connected to the valve body, the valve stem 3 being used to transmit operating force to the valve body to control the closing of the valve; the valve stem includes a fiber optic torque sensor (...). Figure 5 and Figure 6 The fiber Bragg grating torque sensor 1 and fiber Bragg grating torque sensor 2 are shown, along with the valve stem. The fiber Bragg grating torque sensor ( Figure 5 and Figure 6 The fiber Bragg grating torque sensor 1 and fiber Bragg grating torque sensor 2 shown are mounted on the valve stem 3 of the valve. The fiber Bragg grating torque sensor 1 is used to detect the detection data of the valve stem 3. A control mechanism, connected to the valve stem 3, is used to generate and transmit the operating force to the valve stem 3. A processing mechanism, connected to the fiber Bragg grating torque sensor (…), is also included. Figure 5 and Figure 6 The fiber Bragg grating torque sensor 1 and fiber Bragg grating torque sensor 2 shown are connected to receive and process the data from the fiber Bragg grating torque sensor. Figure 5 and Figure 6 The fiber optic torque sensor 1 and fiber optic torque sensor 2 shown detect the detection data when the valve stem 3 is in motion, and determine the torque of the valve based on the detection data.

[0090] In some embodiments, the valve includes a valve body: this is the main structural part of the valve, used to control the flow of fluid; and a valve stem: a moving part connected to the valve body, used to transmit operating force to the valve body to control the opening and closing of the valve.

[0091] In some embodiments, see Figure 7 , Figure 7 This is a schematic diagram of the structure of a valve torque detection system provided in an embodiment of this application. The valve torque detection system includes: a valve, the valve including a valve stem and a valve body, the valve stem and the valve body being connected, the valve stem being used to transmit operating force to the valve body to control the closing of the valve; the valve stem including a fiber optic torque sensor (…). Figure 7 The fiber Bragg grating torque sensor 1 and fiber Bragg grating torque sensor 2 are shown, along with the valve stem. The fiber Bragg grating torque sensor ( Figure 7The fiber Bragg grating torque sensor 1 and fiber Bragg grating torque sensor 2 shown are mounted on the valve stem of the valve. The fiber Bragg grating torque sensor 1 and fiber Bragg grating torque sensor 2 are used to detect the valve's detection data; a control mechanism, connected to the valve stem, is used to generate and transmit the operating force to the valve stem; a processing mechanism (… Figure 7 The host computer shown), the processing mechanism and the fiber optic torque sensor ( Figure 7 The fiber Bragg grating torque sensor 1 and fiber Bragg grating torque sensor 2 shown are connected via a fiber Bragg grating tuner for receiving and processing the data from the fiber Bragg grating torque sensor. Figure 7 The fiber optic torque sensor 1 and fiber optic torque sensor 2 shown detect the detection data when the valve stem is in motion, and determine the torque of the valve based on the detection data.

[0092] In some embodiments, see Figure 5 Figure 6 The valve stem is cylindrical, and the bottom surface of the fiber Bragg grating torque sensor is attached to the surface of the cylinder. Fiber Bragg grating torque sensor 1 and fiber Bragg grating torque sensor 2 are mounted on the valve stem to detect torque data during valve operation. Fiber Bragg grating torque sensor 1 and fiber Bragg grating torque sensor 2 can be fiber Bragg grating torque sensors. A control mechanism is connected to the valve stem 3 to generate and transmit operating force. This can be manual operation or an automatic control system, such as a motor drive.

[0093] In some embodiments, the processing mechanism is connected to fiber Bragg grating torque sensor 1 and fiber Bragg grating torque sensor 2 to receive and process torque data detected by the fiber Bragg grating torque sensors when the valve stem 3 moves. The processing mechanism may include signal conditioning circuitry, a data acquisition system, a computing unit, etc., for analyzing the fiber Bragg grating torque sensor data and determining the valve torque. Based on the detected data, the processing mechanism can calculate the actual torque value of the valve and process and correct the data using algorithms to obtain a more accurate torque reading. The processing mechanism can be the executing entity of the valve stem torque detection method provided in this application embodiment.

[0094] In some embodiments, when the valve is operated, the control mechanism generates an operating force, which is transmitted to the valve body through the valve stem 3 to control the opening or closing of the valve. Fiber Bragg grating torque sensor 1 and fiber Bragg grating torque sensor 2 detect torque data during the movement of the valve stem 3. The detected data is transmitted to a processing mechanism via a connection line. The processing mechanism analyzes and processes the received data to determine the valve's torque. The processing mechanism may also send the torque data to a control unit for monitoring and controlling the valve's operation.

[0095] In some embodiments, the advantages of using fiber Bragg grating torque sensors include high accuracy, immunity to electromagnetic interference, corrosion resistance, and the ability to operate in harsh environments. This makes fiber Bragg grating torque sensors ideal for valve torque detection, particularly in industrial automation, aerospace, and automotive fields. Real-time monitoring of valve torque can prevent overuse or damage, extend valve lifespan, and ensure normal system operation.

[0096] In some embodiments, see Figures 5 to 6 The fiber Bragg grating torque sensor includes a first fiber Bragg grating torque sensor, which is mounted on the valve stem and encased in a metal protective shell 5 (whether or not it is encased in a metal protective shell does not constitute a limitation on the embodiments of this application), and forms a positive 45-degree angle with the axial direction of the valve stem; and a second fiber Bragg grating torque sensor, which is mounted on the valve stem and encased in a metal protective shell 5, and forms a negative 45-degree angle with the axial direction of the valve stem; the first fiber Bragg grating torque sensor and the second fiber Bragg grating torque sensor have the same fiber Bragg grating torque sensor parameters, and the first fiber Bragg grating torque sensor and the second fiber Bragg grating torque sensor are mounted in different positions on the valve stem.

[0097] In some embodiments, the fiber Bragg grating torque sensor can be fixed to the valve stem by adhesive bonding or welding, and then the fiber Bragg grating sensor can be encased in a metal protective shell.

[0098] In some embodiments, the fiber optic torque sensor parameters of the first fiber optic torque sensor 1 and the second fiber optic torque sensor 2 are the same, and the installation positions of the first fiber optic torque sensor 1 and the second fiber optic torque sensor 2 on the target valve stem section 4 are different.

[0099] In some embodiments, fiber Bragg grating torque sensors 1 and 2 are mounted on the target valve stem section 4. This design allows the fiber Bragg grating torque sensors to be tightly integrated with the valve stem, reducing design complexity caused by installation space limitations. The metal protective housing 5 protects the fiber Bragg grating torque sensors from damage caused by the external environment. The protective housing connects to the edge of the target valve stem section, providing additional mechanical protection and environmental sealing.

[0100] In some embodiments, the first fiber Bragg grating torque sensor 1 and the second fiber Bragg grating torque sensor 2 are mounted axially on the valve stem 3 at angles of +45 degrees and -45 degrees, respectively. This angular mounting is advantageous for measuring the stress and torque of the valve stem during rotation, as the two fiber Bragg grating torque sensors can provide stress data at different angles.

[0101] In some embodiments, fiber Bragg grating torque sensor 1 and fiber Bragg grating torque sensor 2 are mounted on the target valve stem segment 4, and the dimensions of the target valve stem segment 4 match the dimensions of the fiber Bragg grating torque sensors, ensuring the tightness and stability of the fiber Bragg grating torque sensor installation. Both fiber Bragg grating torque sensor 1 and fiber Bragg grating torque sensor 2 are fiber Bragg grating torque sensors. Due to their high sensitivity, resistance to electromagnetic interference, and resistance to high temperature and high pressure, fiber Bragg grating torque sensors are suitable for monitoring the torque of the valve stem. The first fiber Bragg grating torque sensor 1 forms a positive 45-degree angle with the axis of the valve stem 3, and the second fiber Bragg grating torque sensor 2 forms a negative 45-degree angle with the axis of the valve stem 3. This arrangement allows the fiber Bragg grating torque sensors to detect stress changes in different directions during valve stem rotation, which helps to accurately calculate torque. The different mounting positions of sensor 1 and fiber Bragg grating torque sensor 2 on the target valve stem segment 4 can provide information about torque distribution, increasing the reference value of the data.

[0102] As an example, a large control valve in a chemical plant needs precise torque monitoring during its operation to ensure proper valve function and prevent equipment damage. A first fiber Bragg grating torque sensor 1 is encapsulated and mounted on the target valve stem segment 4 at a positive 45-degree angle to the valve stem axis. When the valve stem is subjected to torque, fiber Bragg grating torque sensor 1 records the corresponding strain data. A second fiber Bragg grating torque sensor 2 is also encapsulated and mounted on the target valve stem segment 4, but at a negative 45-degree angle to the valve stem axis. Fiber Bragg grating torque sensor 2 also records strain data, but in the opposite direction. Fiber Bragg grating torque sensor 1 and fiber Bragg grating torque sensor 2 have the same parameters but are installed in different positions, allowing for the acquisition of stress data on the valve stem at two different angles. This data is used to calculate the torque of the valve stem. By comparing and analyzing the data from the two fiber Bragg grating torque sensors, the torque change of the valve stem during rotation can be determined more accurately. In a chemical plant, when a valve is operated, the valve stem torque can be monitored in real time to ensure that the valve operation does not exceed its designed safety limits. If an abnormal torque is detected, the system can immediately issue an alarm and take measures to prevent equipment damage or production accidents.

[0103] Thus, the valve torque detection system effectively measures the torque changes of the valve stem during operation by installing two fiber Bragg grating torque sensors (a first fiber Bragg grating torque sensor and a second fiber Bragg grating torque sensor) on the valve stem, at positive and negative 45-degree angles to the valve stem axis, respectively. The two fiber Bragg grating torque sensors have identical parameters but are installed in different positions, which improves the accuracy and redundancy of torque measurement. When the valve operates, the fiber Bragg grating torque sensors detect torque data, which is pre-processed and demodulated by a demodulator before being transmitted to the processing unit. The processing unit receives and processes this data to determine the valve torque. This design provides accurate torque measurement, helping to monitor the valve's operating status, prevent overuse or damage, extend the valve's service life, and ensure the normal operation of the system. Furthermore, by using two fiber Bragg grating torque sensors installed at different angles, the system can better resist external interference, improving the stability and reliability of torque measurement, thereby providing accurate data support for valve monitoring and control and improving system performance.

[0104] In some embodiments, the valve torque detection system further includes: a demodulator, the processing mechanism, and the fiber optic torque sensor. Figures 5 to 6 The fiber optic grating torque sensor 1 and fiber optic grating torque sensor 2 shown are connected through the demodulator.

[0105] In some embodiments, the demodulator is used to receive and preprocess the fiber Bragg grating torque sensor (…). Figures 5 to 6 The fiber optic torque sensor 1 and fiber optic torque sensor 2 shown detect the detection data when the valve stem is in the motion state, and send the pre-processed detection data to the processing mechanism to determine the torque.

[0106] In some embodiments, the demodulator plays a crucial role in the valve torque detection system. It receives and preprocesses data from fiber Bragg grating torque sensors, then sends the processed data to the processing unit for further analysis and torque value determination. The demodulator receives raw detection data from fiber Bragg grating torque sensors 1 and 2. This data may contain torque variations caused by valve stem movement. The demodulator preprocesses the raw data, including amplification, filtering, and noise reduction. These processing steps aim to improve the signal-to-noise ratio, enhance signal clarity and stability, and facilitate subsequent processing and analysis. The signal output from the fiber Bragg grating torque sensor is a modulated optical signal. The demodulator converts the modulated optical signal into an electrical signal and extracts specific information reflecting torque variations. This process is called demodulation. The demodulator sends the preprocessed and demodulated data to the processing unit. This data is now ready for analysis to determine the valve torque.

[0107] In some embodiments, the demodulator may have the capability to monitor fiber Bragg grating torque sensor data in real time to promptly detect abnormal or out-of-preset torque variations. The demodulator may include calibration functions to ensure the accuracy of the fiber Bragg grating torque sensor data. This may involve calibrating the output of the fiber Bragg grating torque sensor to match known torque values. The demodulator may have interfaces for communicating with other system components, such as processing mechanisms or control systems, to transmit torque data or receive control commands.

[0108] In some embodiments, the demodulator can improve the accuracy and reliability of fiber Bragg grating torque sensor data through preprocessing and demodulation. The demodulator handles data preprocessing and demodulation, simplifying the complexity of the processing mechanism. It enables rapid data processing, reducing processing time and thus improving the overall system response speed. The demodulator is an indispensable component of the valve torque detection system; it receives data from the fiber Bragg grating torque sensor, performs necessary preprocessing and demodulation, and then sends the processed data to the processing mechanism. This design improves data accuracy and system efficiency, ensuring precise measurement and control of valve torque.

[0109] Thus, the valve torque detection system effectively measures the torque changes of the valve stem during operation by installing two fiber Bragg grating torque sensors (a first fiber Bragg grating torque sensor and a second fiber Bragg grating torque sensor) on the valve stem, at positive and negative 45-degree angles to the valve stem axis, respectively. The two fiber Bragg grating torque sensors have identical parameters but are installed in different positions, which improves the accuracy and redundancy of torque measurement. When the valve operates, the fiber Bragg grating torque sensors detect torque data, which is pre-processed and demodulated by a demodulator before being transmitted to the processing unit. The processing unit receives and processes this data to determine the valve torque. The demodulator receives and pre-processes the fiber Bragg grating torque sensor data to ensure its accuracy and stability before sending the processed data to the processing unit. This design provides accurate torque measurement, helps monitor the valve's operating status, prevents overuse or damage, extends the valve's service life, and ensures the normal operation of the system. Furthermore, by using two fiber optic torque sensors installed at different angles, and with the preprocessing and demodulation functions of the demodulator, the system can better resist external interference, improve the stability and reliability of torque measurement, thereby providing accurate data support for valve monitoring and control and improving system performance.

[0110] The following will describe an exemplary application of the embodiments of this application in a practical torque measurement scenario.

[0111] This application embodiment achieves valve torque measurement by arranging a fiber optic grating torque sensor (FBG torque sensor) on the valve stem surface at an angle of ±45° to the axial direction of the valve stem being measured. The valve torque is measured based on the linear relationship between the valve stem torque and the center wavelength offset of the fiber optic grating torque sensor installed at an angle of ±45° to the valve stem axis.

[0112] On the valve stem surface, two fiber optic torque sensors are arranged at ±45° angles to the valve stem axis. The valve torque can be obtained by establishing a linear relationship between the valve stem torque and the center wavelength offset of any fiber optic torque sensor installed at ±45° angles to the valve stem axis. Two fiber optic torque sensors (FBG1 and FBG2) with identical strain and temperature sensitivity are used, arranged at ±45° angles to the valve stem axis, respectively. Figure 5 This can solve the problem of strain and temperature cross-sensitivity in measuring valve stem torque using fiber optic torque sensors.

[0113] Two (metal-encapsulated) fiber Bragg grating torque sensors (FBG1 and FBG2) are fixed to the surface of the uniformly stressed section of the valve stem at an angle of ±45° to the axial direction of the valve stem to be measured, using adhesive bonding or welding. Figure 5 The valve stem torque is measured by measuring the maximum normal strain on the surface of the uniformly stressed section of the valve stem. The fiber optic pigtail of the fiber optic torque sensor is connected to a fiber optic demodulator, which is then connected to a host computer. An actuator drives the valve under test. During valve actuation, the host computer uses the fiber optic demodulator to acquire the center wavelength of the fiber optic torque sensors (FBG1 and FBG2). λ1 and λ2; When the temperature of the valve stem under test remains constant, the torque of the valve stem under test is calculated based on the relationship between the center wavelength of the fiber optic torque sensor and the maximum normal strain on the surface of the uniformly stressed section of the valve stem. T : (5) in, T The torque of the valve stem to be measured; G The shear modulus of the valve stem material to be tested; D The diameter of the section of the valve stem under uniform stress is the test diameter. This represents the center wavelength offset of the fiber Bragg grating torque sensor. This refers to the strain sensitivity of the fiber Bragg grating torque sensor.

[0114] In some embodiments, the center wavelength of the fiber Bragg grating torque sensors (FBG1 and FBG2) is acquired. λ1 or Substituting λ2 into the above formula λB can be used to calculate the torque of the valve stem under isothermal conditions. When the temperature of the valve stem changes, the torque of the valve stem is calculated based on the relationship between the center wavelength offset of the fiber optic torque sensor, the maximum normal strain on the surface of the uniformly stressed section of the valve stem, and the temperature. T : (6) in, λ 1 and λ 2 represents the center wavelength offset of fiber optic grating torque sensors FBG1 and FBG2, respectively.

[0115] The center wavelength of the fiber Bragg grating torque sensor (FBG1 and FBG2) will be acquired. λ 1 and λ The above formula can be used to calculate the torque of the valve stem under variable temperature conditions, thus solving the problem of cross-sensitivity between strain and temperature in the measurement of valve stem torque by fiber optic grating.

[0116] In some embodiments, see Figure 8 , Figure 8 This is a graph showing the change of the center wavelength of the fiber optic grating torque sensor provided in this embodiment over time. Figure 8 Specifically, it measures the change in the center wavelength of the fiber optic grating torque sensor over time during the four full opening and closing strokes of the electric ball valve. Figure 8 A represents the change in the center wavelength of a fiber Bragg grating torque sensor mounted at +45° over time. Figure 8 b is the change in the center wavelength of the fiber optic grating torque sensor installed at -45° over time. Figure 8 a and Figure 8 b represents the change in the center wavelength of the fiber optic grating torque sensor over time during the static characteristic test of the electric ball valve under four full opening and closing strokes. Since the two FBG torque sensors are installed at ±45 degrees along the valve stem axis respectively, with opposite stress directions, the changing trends of the center wavelengths of the two fiber optic grating torque sensors are roughly opposite.

[0117] In some embodiments, see Figure 9 , Figure 9 This is a schematic diagram illustrating the relationship between the center wavelength of the fiber Bragg grating torque sensor provided in this embodiment and the valve stem torque. Figure 9 Figure a shows the valve stem closing stroke: a fiber optic torque sensor is installed at +45°. Figure 9 Figure b shows the valve stem opening stroke: a fiber optic torque sensor is installed at +45°. Figure 9 Figure c shows the valve stem closing stroke, with a fiber optic torque sensor installed at -45°. Figure 9Figure d shows the valve stem closing stroke: a fiber optic grating torque sensor is installed at -45°. Figure 9 Tables (a) to (d) present verification examples of the relationship between the center wavelength and torque of a fiber Bragg grating torque sensor installed at ±45° along the valve stem axis during four closing and opening strokes, respectively, and the linear fitting curves. The corrected coefficient of determination (Adj.R²) of the linear regression equation for the linear fitting curves is greater than 0.99, indicating good linearity of the fiber Bragg grating torque sensor. When the wavelength of the fiber Bragg grating torque sensor remains unchanged during the closing and opening processes and the ammeter reading does not fluctuate, the average Bragg wavelength within 20 seconds after the pause is used as the Bragg wavelength value corresponding to the torque value measured by the commercial fiber Bragg grating torque sensor. Figure 9 The slopes of the linear fitting curves (a) to (d) represent the sensitivity of the fiber optic grating torque sensor. The FBG in the +45° direction is 0.715 pm / N·m with a standard deviation not exceeding 0.0062 pm / N·m, and the FBG in the -45° direction is 0.717 pm / N·m with a standard deviation not exceeding 0.0063 pm / N·m.

[0118] The following description continues to illustrate the exemplary structure of the valve torque detection device 455 provided in the embodiments of this application as a software module. In some embodiments, such as... Figure 2 As shown, the software module stored in the valve torque detection device 455 in the memory 450 may include: a detection module for acquiring detection data of the valve to be tested, wherein the detection data of the valve to be tested is obtained by a fiber Bragg grating torque sensor installed on the valve stem of the valve to be tested; a determination module for determining a first torque reference value of the valve to be tested based on the detection data and the fiber Bragg grating torque sensor parameters; and an acquisition module for acquiring the valve stem parameters of the valve stem to be tested, and determining the torque of the valve to be tested based on the valve stem parameters and the first torque reference value.

[0119] In some embodiments, the fiber Bragg grating torque sensor includes a first fiber Bragg grating torque sensor and a second fiber Bragg grating torque sensor. The detection module is further configured to receive first detection data sent by the first fiber Bragg grating torque sensor and receive second detection data sent by the second fiber Bragg grating torque sensor. The determination module is further configured to determine a first torque reference value of the valve to be detected based on at least one of the first detection data and the second detection data, and the parameters of the fiber Bragg grating torque sensor.

[0120] In some embodiments, the determining module is further configured to acquire the detection time of the detection data and determine the temperature influence factor of the valve to be tested at the detection time. The temperature influence factor is used to indicate whether the temperature will affect the detection of the fiber Bragg grating torque sensor. When the temperature influence factor indicates that the temperature will affect the detection of the fiber Bragg grating torque sensor, a first torque reference value of the valve to be tested is determined based on the first detection data, the second detection data, and the parameters of the fiber Bragg grating torque sensor. When the temperature influence factor indicates that the temperature will not affect the detection of the fiber Bragg grating torque sensor, a first torque reference value of the valve to be tested is determined based on either the first detection data or the second detection data, and the parameters of the fiber Bragg grating torque sensor.

[0121] In some embodiments, the determining module is further configured to determine the difference between the first detection data and the second detection data, obtain the first coefficient of the fiber Bragg grating torque sensor parameter, multiply the first coefficient and the fiber Bragg grating torque sensor parameter to obtain the first fiber Bragg grating torque sensor parameter, and determine the ratio of the difference to the first fiber Bragg grating torque sensor parameter as the first torque reference value of the valve to be detected.

[0122] In some embodiments, the determining module is further configured to determine either the first detection data or the second detection data as target detection data, obtain a second coefficient of the fiber Bragg grating torque sensor parameter, multiply the second coefficient and the fiber Bragg grating torque sensor parameter to obtain a second fiber Bragg grating torque sensor parameter, and determine the ratio of the target detection data and the second fiber Bragg grating torque sensor parameter as a first torque reference value of the valve to be detected.

[0123] In some embodiments, the valve stem parameters include the shear modulus of the valve stem material and the diameter of the valve stem at a target position, wherein the target position is the mounting position of the fiber optic torque sensor on the valve stem; the acquisition module is further configured to determine the product of the shear modulus, the diameter and pi as a second torque reference value, and to determine the product of the first torque reference value and the second torque reference value as the torque of the valve to be detected.

[0124] This application provides a computer program product, which includes a computer program or computer-executable instructions stored in a computer-readable storage medium. The processor of an electronic device reads the computer-executable instructions from the computer-readable storage medium and executes the computer-executable instructions, causing the electronic device to perform the valve torque detection method described above in this application.

[0125] This application provides a computer-readable storage medium storing computer-executable instructions. When these computer-executable instructions are executed by a processor, they cause the processor to execute the torque detection method for a valve provided in this application. For example, ... Figure 3 The torque detection method for the valve is shown.

[0126] In some embodiments, the computer-readable storage medium may be a memory such as FRAM, ROM, PROM, EPROM, EEPROM, flash memory, magnetic surface memory, optical disk, or CD-ROM; or it may be a variety of electronic devices including one or any combination of the above-mentioned memories.

[0127] In some embodiments, computer-executable instructions may take the form of programs, software, software modules, scripts, or code, written in any form of programming language (including compiled or interpreted languages, or declarative or procedural languages), and may be deployed in any form, including as stand-alone programs or as modules, components, subroutines, or other units suitable for use in a computing environment.

[0128] As an example, computer-executable instructions may, but do not necessarily, correspond to files in a file system. They may be stored as part of a file that holds other programs or data, for example, in one or more scripts in a HyperText Markup Language (HTML) document, in a single file dedicated to the program in question, or in multiple co-located files (e.g., a file that stores one or more modules, subroutines, or code sections).

[0129] As an example, computer-executable instructions can be deployed to execute on a single electronic device, or on multiple electronic devices located at one location, or on multiple electronic devices distributed across multiple locations and interconnected via a communication network.

[0130] In summary, the embodiments of this application have the following beneficial effects: (1) By acquiring the detection data of the valve to be tested, which is obtained by a fiber optic torque sensor installed on the valve stem, the first torque reference value of the valve to be tested is determined based on the detection data and the parameters of the fiber optic torque sensor. The valve stem parameters are then acquired, and the torque of the valve to be tested is determined based on the valve stem parameters and the first torque reference value. The fiber optic torque sensor is directly installed on the valve stem, rather than between the output shaft of the electric actuator and the valve stem, avoiding the need for an additional fiber optic torque sensor between the two, thus reducing installation complexity and the space occupied by the valve stem. Since the fiber optic torque sensor is directly installed on the valve stem, no additional installation space or structural support is required, thereby reducing the torque detection accuracy problem caused by physical strength limitations. In addition to relying on the detection data of the fiber optic torque sensor, the physical parameters of the valve stem (such as shear modulus and diameter) are also combined. These parameters are used to calculate and correct the torque value, improving the accuracy of the measurement results. By acquiring detection data of the valve stem during dynamic processes, torque changes can be monitored in real time, which is crucial for ensuring the valve stem continues to function normally under extreme torque conditions. Utilizing the parameters of a fiber Bragg grating torque sensor helps calibrate the sensor, reducing errors and ensuring accurate and reliable torque measurement even under varying operating conditions. A method that determines torque by directly mounting a fiber Bragg grating torque sensor on the valve stem and combining its parameters with the valve stem's physical parameters provides higher accuracy and reliability in torque detection without sacrificing the valve stem's normal operating capability. This method expands the application scenarios of torque detection, enabling it to adapt to a wider torque range while ensuring the safety of the valve stem under various operating conditions, thus effectively improving the accuracy of valve stem torque detection while ensuring normal valve stem operation.

[0131] (2) By utilizing the difference between the first and second detection data, combined with the first coefficient of the fiber Bragg grating torque sensor parameters, when temperature affects the detection of the fiber Bragg grating torque sensor, the interference of temperature changes on torque measurement can be effectively eliminated, improving the accuracy and stability of torque measurement. This helps to more accurately monitor and regulate valve operation, ensuring stable valve operation under fluctuating temperature conditions. Simultaneously, this method reduces the impact of temperature changes on the output signal of the fiber Bragg grating torque sensor, lowering the risk of system failure and improving system reliability and safety. Furthermore, by calculating the ratio of the difference to the fiber Bragg grating torque sensor parameters, the obtained torque reference value is closer to the actual torque value, helping to optimize valve control strategies, improve energy efficiency, and reduce operating costs.

[0132] (3) When temperature has no effect on the detection of the fiber Bragg grating torque sensor, the advantage of simplified torque measurement is that it can quickly and directly provide a torque reference value, eliminating the need for temperature correction, thereby improving the efficiency and accuracy of the measurement process. By selecting any detection data as the target detection data and combining it with the second coefficient of the fiber Bragg grating torque sensor parameters, the torque reference value can be quickly calculated, thus providing real-time data support for valve monitoring and control. This method reduces the complexity of system design and operation, reduces potential sources of error, and improves the overall reliability of the system. Therefore, when the temperature is stable or the effect of temperature change on the output of the fiber Bragg grating torque sensor is negligible, the accuracy of torque measurement can be effectively guaranteed, and it helps to optimize valve operation and maintenance and improve system performance.

[0133] (4) By acquiring the detection time of the detection data and determining the temperature influence factor of the valve to be tested, the influence of temperature on the detection of the fiber Bragg grating torque sensor can be effectively evaluated. When the temperature influence factor indicates that the temperature will affect the detection of the fiber Bragg grating torque sensor, the torque reference value can be determined by using the method based on the first detection data, the second detection data, and the parameters of the fiber Bragg grating torque sensor. This can eliminate the error caused by temperature changes and thus improve the accuracy of torque measurement. This method can ensure that the monitoring and control of valve operation remains highly accurate even in environments with large temperature variations. When the temperature influence factor indicates that the temperature will not affect the detection of the fiber Bragg grating torque sensor, the torque reference value can be determined by using the method based on the first detection data or the second detection data and the parameters of the fiber Bragg grating torque sensor. This can simplify the calculation process and improve the efficiency of data processing. This not only ensures the accuracy of torque measurement but also reduces the complexity of system design and operation, reduces potential sources of error, and improves the overall reliability of the system. Therefore, regardless of whether the temperature influence exists or not, by acquiring the detection time and temperature influence factor in real time and using the corresponding torque measurement method, the accuracy, efficiency, and reliability of torque measurement can be effectively guaranteed, providing accurate data support for valve monitoring and control and improving system performance.

[0134] (5) The valve torque detection system effectively measures the torque change of the valve stem during operation by installing two fiber Bragg grating torque sensors (a first fiber Bragg grating torque sensor and a second fiber Bragg grating torque sensor) on the valve stem, at positive and negative 45-degree angles to the valve stem axis, respectively. The two fiber Bragg grating torque sensors have the same parameters but are installed in different positions, which improves the accuracy and redundancy of torque measurement. When the valve is operated, the fiber Bragg grating torque sensor detects the torque data, which is pre-processed and demodulated by a demodulator before being transmitted to the processing unit. The processing unit receives and processes this data to determine the valve torque. This design provides accurate torque measurement, helps monitor the valve's operating status, prevents overuse or damage, extends the valve's service life, and ensures the normal operation of the system. Furthermore, by using two fiber Bragg grating torque sensors installed at different angles, the system can better resist external interference, improve the stability and reliability of torque measurement, thereby providing accurate data support for valve monitoring and control and improving system performance.

[0135] (6) The valve torque detection system effectively measures the torque change of the valve stem during operation by installing two fiber Bragg grating torque sensors (a first fiber Bragg grating torque sensor and a second fiber Bragg grating torque sensor) on the valve stem, at positive and negative 45-degree angles to the valve stem axis, respectively. The two fiber Bragg grating torque sensors have the same parameters but are installed in different positions, which improves the accuracy and redundancy of torque measurement. When the valve is operated, the fiber Bragg grating torque sensor detects torque data, which is pre-processed and demodulated by a demodulator before being transmitted to the processing mechanism. The processing mechanism receives and processes this data to determine the valve torque. The demodulator receives and pre-processes the fiber Bragg grating torque sensor data to ensure the accuracy and stability of the data, and then sends the processed data to the processing mechanism. This design provides accurate torque measurement, helps monitor the valve's operating status, prevents overuse or damage, extends the valve's service life, and ensures the normal operation of the system. Furthermore, by using two fiber optic torque sensors installed at different angles, and with the preprocessing and demodulation functions of the demodulator, the system can better resist external interference, improve the stability and reliability of torque measurement, thereby providing accurate data support for valve monitoring and control and improving system performance.

[0136] The above description is merely an embodiment of this application and is not intended to limit the scope of protection of this application. Any modifications, equivalent substitutions, and improvements made within the spirit and scope of this application are included within the scope of protection of this application.

Claims

1. A method for detecting the torque of a valve, characterized in that, The method includes: The detection data of the valve to be tested is obtained by a fiber optic grating torque sensor installed on the valve stem of the valve to be tested. Based on the detection data and the fiber optic grating torque sensor parameters, a first torque reference value for the valve to be detected is determined; Obtain the valve stem parameters and, based on the valve stem parameters and the first torque reference value, determine the torque of the valve to be tested.

2. The method according to claim 1, characterized in that, The fiber Bragg grating torque sensor includes a first fiber Bragg grating torque sensor and a second fiber Bragg grating torque sensor. Acquiring the detection data of the valve to be detected includes: Receive first detection data sent by the first fiber Bragg grating torque sensor, and receive second detection data sent by the second fiber Bragg grating torque sensor; The determination of the first torque reference value of the valve to be detected based on the detection data and the fiber Bragg grating torque sensor parameters includes: Based on at least one of the first detection data and the second detection data, and the parameters of the fiber optic torque sensor, a first torque reference value for the valve to be detected is determined.

3. The method according to claim 2, characterized in that, The step of determining a first torque reference value for the valve to be detected based on at least one of the first detection data and the second detection data, and the parameters of the fiber optic torque sensor, includes: The detection time of the detection data is obtained, and the temperature influence factor of the valve to be detected at the detection time is determined. The temperature influence factor is used to indicate whether the temperature will affect the detection of the fiber optic torque sensor. When the temperature influence factor indicates that the temperature will affect the detection of the fiber Bragg grating torque sensor, a first torque reference value of the valve to be detected is determined based on the first detection data, the second detection data, and the parameters of the fiber Bragg grating torque sensor. When the temperature influence factor indicates that the temperature will not affect the detection of the fiber Bragg grating torque sensor, a first torque reference value of the valve to be detected is determined based on either the first detection data or the second detection data, and the parameters of the fiber Bragg grating torque sensor.

4. The method according to claim 3, characterized in that, The step of determining the first torque reference value of the valve to be tested based on the first detection data, the second detection data, and the parameters of the fiber optic torque sensor includes: Determine the difference between the first detection data and the second detection data, and obtain the first coefficient of the fiber optic grating torque sensor parameter. Multiply the first coefficient and the fiber optic grating torque sensor parameter to obtain the first fiber optic grating torque sensor parameter. The ratio of the difference to the parameter of the first fiber optic grating torque sensor is determined as the first torque reference value of the valve to be detected.

5. The method according to claim 3, characterized in that, The step of determining the first torque reference value of the valve to be detected based on either the first detection data or the second detection data, and the parameters of the fiber optic torque sensor, includes: Either the first detection data or the second detection data is determined as the target detection data, and the second coefficient of the fiber optic grating torque sensor parameter is obtained. The second coefficient is multiplied by the fiber optic grating torque sensor parameter to obtain the second fiber optic grating torque sensor parameter. The ratio of the target detection data to the parameters of the second fiber optic torque sensor is determined as the first torque reference value of the valve to be detected.

6. The method according to claim 1, characterized in that, The valve stem parameters include the shear modulus of the valve stem material and the diameter of the valve stem at a target position, where the target position is the mounting position of the fiber optic torque sensor on the valve stem. Determining the torque of the valve to be tested based on the valve stem parameters and the first torque reference includes: The product of the shear modulus, the diameter, and pi is determined as the second torque reference value, and the product of the first torque reference value and the second torque reference value is determined as the torque of the valve to be tested.

7. A torque detection system for a valve, characterized in that, The system includes: A valve, comprising a valve stem and a valve body, wherein the valve stem and the valve body are connected, and the valve stem is used to transmit an operating force to the valve body to control the closing of the valve; A fiber optic grating torque sensor is mounted on the valve stem and is used to detect the valve's detection data. A control mechanism, connected to the valve stem, is used to generate and transmit the operating force to the valve stem; A processing mechanism, connected to the fiber Bragg grating torque sensor, is used to receive and process the detection data detected by the fiber Bragg grating torque sensor when the valve stem is in motion, and to determine the torque of the valve based on the detection data.

8. The system according to claim 7, characterized in that, The valve stem is cylindrical, and the bottom surface of the fiber Bragg grating torque sensor is attached to the surface of the cylinder. The fiber Bragg grating torque sensor includes: The first fiber optic grating torque sensor is installed on the valve stem of the valve and then covered by a metal protective shell, forming a positive 45-degree angle with the axial direction of the valve stem. The second fiber optic grating torque sensor is installed on the valve stem of the valve and then covered by the metal protective shell, forming a negative 45-degree angle with the axial direction of the valve stem. The first fiber Bragg grating torque sensor and the second fiber Bragg grating torque sensor have the same fiber Bragg grating torque sensor parameters, but the first fiber Bragg grating torque sensor and the second fiber Bragg grating torque sensor are installed at different positions on the valve stem.

9. The system according to claim 7, characterized in that, The system also includes: The demodulator is used to connect the processing mechanism and the fiber optic torque sensor. The demodulator is used to receive and preprocess the detection data detected by the fiber optic grating torque sensor when the valve stem is in the motion state, and send the preprocessed detection data to the processing mechanism to determine the torque.

10. A torque detection device for a valve, characterized in that, The device includes: The detection module is used to acquire the detection data of the valve to be tested, which is obtained by a fiber optic grating torque sensor installed on the valve stem of the valve to be tested. The determination module is used to determine a first torque reference value for the valve to be detected based on the detection data and the fiber optic torque sensor parameters of the fiber optic torque sensor. The acquisition module is used to acquire the valve stem parameters of the valve stem to be tested, and determine the torque of the valve to be tested based on the valve stem parameters and the first torque reference value.

11. An electronic device, characterized in that, The electronic device includes: Memory is used to store executable instructions or computer programs. The processor, when executing computer-executable instructions or computer programs stored in the memory, implements the torque detection method for the valve according to any one of claims 1 to 6.

12. A computer-readable storage medium storing computer-executable instructions or a computer program, characterized in that, When the computer-executable instructions or computer program are executed by a processor, the torque detection method for the valve according to any one of claims 1 to 6 is implemented.

Images