Valve torque detection method, system and device, electronic equipment and storage medium

Abstract

The invention provides a valve torque detection method, system and device, electronic equipment and a storage medium. The method comprises the following steps: acquiring detection data of a to-be-detected valve, wherein the detection data of the to-be-detected valve is detected by a fiber bragg grating torque sensor mounted on a valve rod of the to-be-detected valve; determining a first torque reference quantity of the to-be-detected valve based on the detection data and fiber grating torque sensor parameters of the fiber grating torque sensor; and valve rod parameters of the valve rod are obtained, and the torque of the to-be-detected valve is determined based on the valve rod parameters and the first torque reference quantity. According to the invention, the torque detection accuracy of the valve rod can be effectively improved while the normal work of the valve rod is ensured.

Description

Technical Field

[0001] The present application relates to the field of valve detection, and particularly to a method, system, device, electronic device and storage medium for detecting the torque of a valve. Background Art

[0002] In the energy and chemical industries, especially in the nuclear power field, valves are key components for controlling the on-off, flow direction, flow rate, pressure and temperature of flammable, explosive, toxic, harmful or corrosive media in pipelines. Their operating status is crucial. Once a malfunction such as jamming occurs, it will cause huge economic losses and even casualties. Therefore, ensuring the continuous and reliable operation of valves is the key to ensuring the safety of energy and chemical equipment. Among the many parameters closely related to the operating status and comprehensive performance of valves, the dynamically changing valve opening and closing torque is an important indicator. Realizing the real-time, on-line and accurate measurement of valve torque provides important basic data for the design and manufacture of valves, and can also provide strong technical support for its preventive maintenance, thus improving the safety and reliability of equipment operation.

[0003] In the related art, for the torque detection of the valve stem, an electrical signal sensor is usually installed 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. Since the electrical signal sensor is easily affected by electromagnetic interference, the detection accuracy of the torque in the related art is relatively low. Summary of the Invention

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

[0005] The technical solution of the embodiments of the present application is realized as follows:

[0006] The embodiments of the present application provide a method for detecting the torque of a valve, including:

[0007] Obtaining the detection data of the valve to be detected, where the detection data of the valve to be detected is detected by a fiber Bragg grating torque sensor installed on the valve stem of the valve to be detected;

[0008] Based on the detection data and the fiber Bragg grating torque sensor parameters of the fiber Bragg grating torque sensor, determining a first torque reference quantity of the valve to be detected;

[0009] Obtaining the valve stem parameters of the valve stem, and based on the valve stem parameters and the first torque reference quantity, determining the torque of the valve to be detected.

[0010] The embodiments of the present application provide a system for detecting the torque of a valve, including:

[0011] A valve, the valve includes a valve stem and a valve body, the valve stem is connected to the valve body, and the valve stem is used to transmit an operating force to the valve body to control the closing of the valve;

[0012] The valve stem includes a fiber Bragg grating torque sensor and a valve stem, the fiber Bragg grating torque sensor is installed on the valve stem, and the fiber Bragg grating torque sensor is used to detect the detection data of the valve;

[0013] A control mechanism, the control mechanism is connected to the valve stem and is used to generate and transmit the operating force to the valve stem;

[0014] A processing mechanism, the processing mechanism is connected to the fiber Bragg grating torque sensor, and is used to receive and process the detection data detected by the fiber Bragg grating torque sensor when the valve stem is in a moving state, and determine the torque of the valve based on the detection data.

[0015] In the above solution, the fiber Bragg grating torque sensor includes: a first fiber Bragg grating torque sensor, the first fiber Bragg grating torque sensor is installed on the valve stem of the valve and then coated with a metal protective shell, and forms a positive 45-degree angle with the axial direction of the valve stem; a second fiber Bragg grating torque sensor, the second fiber Bragg grating torque sensor is installed on the valve stem of the valve and then coated with a metal protective shell, and forms a negative 45-degree angle with the axial direction of the valve stem; the fiber Bragg grating torque sensor parameters of the first fiber Bragg grating torque sensor and the second fiber Bragg grating torque sensor are the same, and the installation positions of the first fiber Bragg grating torque sensor and the second fiber Bragg grating torque sensor on the valve stem are different.

[0016] In the above solution, the torque detection system of the above valve further includes: a demodulator, the processing mechanism and the fiber Bragg grating torque sensor are connected through the demodulator; the demodulator is used to receive and preprocess the detection data detected by the fiber Bragg grating torque sensor when the valve stem is in the moving state, and send the preprocessed detection data to the processing mechanism for the determination of the torque.

[0017] An embodiment of the present application provides a torque detection device for a valve, including:

[0018] A detection module, used to obtain the detection data of the valve to be detected, and the detection data of the valve to be detected is detected by a fiber Bragg grating torque sensor installed on the valve stem of the valve to be detected;

[0019] A determination module, used to determine the first torque reference amount of the valve to be detected based on the detection data and the fiber Bragg grating torque sensor parameters of the fiber Bragg grating torque sensor;

[0020] An acquisition module, configured to acquire the stem parameters of the valve stem to be detected, and determine the torque of the valve to be detected based on the stem parameters and the first torque reference quantity.

[0021] In the above solution, 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 the first detection data sent by the first fiber Bragg grating torque sensor and receive the second detection data sent by the second fiber Bragg grating torque sensor; the determination module is further configured to determine the first torque reference quantity of the valve to be detected based on at least one of the first detection data and the second detection data and the fiber Bragg grating torque sensor parameters.

[0022] In the above solution, the determination module is further configured to obtain the detection time of the detection data and determine the temperature influence factor of the valve to be detected 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, determine the first torque reference quantity of the valve to be detected based on the first detection data, the second detection data, and the fiber Bragg grating torque sensor parameters; when the temperature influence factor indicates that the temperature will not affect the detection of the fiber Bragg grating torque sensor, determine the first torque reference quantity of the valve to be detected based on any one of the first detection data and the second detection data and the fiber Bragg grating torque sensor parameters.

[0023] In the above solution, the determination 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 parameters, multiply the first coefficient by the fiber Bragg grating torque sensor parameters to obtain the first fiber Bragg grating torque sensor parameters; determine the ratio of the difference to the first fiber Bragg grating torque sensor parameters as the first torque reference quantity of the valve to be detected.

[0024] In the above solution, the determination module is further configured to determine any one of the first detection data and the second detection data as the target detection data, obtain the second coefficient of the fiber Bragg grating torque sensor parameters, multiply the second coefficient by the fiber Bragg grating torque sensor parameters to obtain the second fiber Bragg grating torque sensor parameters; determine the ratio of the target detection data to the second fiber Bragg grating torque sensor parameters as the first torque reference quantity of the valve to be detected.

[0025] In the above solution, the valve stem parameters include the shear elastic modulus of the material of the valve stem and the diameter at the target position of the valve stem, and the target position is the installation position of the fiber Bragg grating torque sensor on the valve stem; the above acquisition module is further configured to determine the product of the shear elastic modulus, the diameter and pi as the second torque reference quantity, and determine the product of the first torque reference quantity and the second torque reference quantity as the torque of the valve to be detected.

[0026] An embodiment of the present application provides an electronic device, including:

[0027] A memory for storing computer-executable instructions or computer programs;

[0028] A processor, when executing the computer-executable instructions or computer programs stored in the memory, implements the valve torque detection method provided by the embodiment of the present application.

[0029] An embodiment of the present application provides a computer-readable storage medium storing computer-executable instructions for causing a processor to implement the valve torque detection method provided by the embodiment of the present application when executed.

[0030] An embodiment of the present application provides a computer program product, which includes a computer program or computer-executable instructions, and the computer program or computer-executable instructions are stored in a computer-readable storage medium. The processor of the electronic device reads the computer-executable instructions from the computer-readable storage medium, and the processor executes the computer-executable instructions, so that the electronic device executes the valve torque detection method described above in the embodiment of the present application.

[0031] The embodiment of the present application has the following beneficial effects:

[0032] By obtaining the detection data of the valve to be detected, the detection data of the valve to be detected is detected by a fiber Bragg grating torque sensor installed on the valve stem of the valve to be detected. Based on the detection data and the fiber Bragg grating torque sensor parameters of the fiber Bragg grating torque sensor, a first torque reference quantity of the valve to be detected is determined. The valve stem parameters of the valve stem are obtained, and based on the valve stem parameters and the first torque reference quantity, the torque of the valve to be detected is determined. In this way, the determination of the torque not only depends on the detection data of the fiber Bragg grating torque sensor, but also combines the physical parameters of the valve stem (such as shear modulus of elasticity and diameter). These parameters are used to calculate and correct the torque value, improving the accuracy of the measurement result. By obtaining the detection data of the valve stem during the dynamic process, the torque change of the valve stem can be monitored in real time. This is crucial for ensuring that the valve stem can still operate normally under extreme torque conditions. The utilization of the fiber Bragg grating torque sensor parameters helps to calibrate the fiber Bragg grating torque sensor, reduce errors, and ensure that the torque measurement is accurate and reliable even under different working conditions. By directly installing the fiber Bragg grating torque sensor on the valve stem and combining the fiber Bragg grating torque sensor parameters and the valve stem physical parameters to determine the torque, since the fiber Bragg grating torque sensor is not affected by electromagnetic interference, it can provide higher-precision and more reliable torque detection without sacrificing the normal working ability of the valve stem. Thus, the safety of the valve stem under various operating conditions is ensured, and the accuracy of the torque detection of the valve stem can be effectively improved. Description of the Drawings

[0033] Figure 1 is a schematic structural diagram of the torque detection system provided by an embodiment of the present application;

[0034] Figure 2 is a schematic structural diagram of the electronic device for detecting torque provided by an embodiment of the present application;

[0035] Figure 3 is a schematic flow chart of the method for detecting the torque of the valve provided by an embodiment of the present application Figure 1 ;

[0036] Figure 4 is a schematic flow chart of the method for detecting the torque of the valve provided by an embodiment of the present application Figure 2 ;

[0037] Figure 5 is a schematic structural diagram of the valve stem provided by an embodiment of the present application Figure 1 ;

[0038] Figure 6 The schematic structural diagram of the valve stem provided by the embodiment of the present application Figure 2 ;

[0039] Figure 7 is a schematic structural diagram of the torque detection system of the valve provided by an embodiment of the present application;

[0040] Figure 8 It is a graph showing the change of the central wavelength of the fiber grating torque sensor provided by the embodiment of the present application over time;

[0041] Figure 9 It is a schematic diagram showing the relationship between the central wavelength of the fiber grating torque sensor provided by the embodiment of the present application and the stem torque. Specific Embodiments

[0042] In order to make the objectives, technical solutions, and advantages of the present application clearer, the present application will be further described in detail below with reference to the accompanying drawings. The described embodiments should not be regarded as limitations on the present application. All other embodiments obtained by those of ordinary skill in the art without creative efforts shall fall within the scope of protection of the present application.

[0043] In the following descriptions, reference is made to "some embodiments", which describe subsets of all possible embodiments. However, it can be understood that "some embodiments" can be the same subsets or different subsets of all possible embodiments, and can be combined with each other without conflict.

[0044] In the following descriptions, the terms "first / second / third" are merely used to distinguish similar objects and do not represent a specific order for the objects. It can be understood that "first / second / third" can be interchanged with a specific order or sequence when allowed, so that the embodiments of the present application described herein can be implemented in an order other than those illustrated or described herein.

[0045] Unless otherwise defined, all technical and scientific terms used herein have the same meaning as commonly understood by those of ordinary skill in the technical field to which this application belongs. The terms used herein are only for the purpose of describing the embodiments of this application and are not intended to limit this application.

[0046] Before further elaborating on the embodiments of the present application, the nouns and terms involved in the embodiments of the present application are described. The nouns and terms involved in the embodiments of the present application are applicable to the following explanations.

[0047] 1) Torque: In physics, it is the moment that causes an object to rotate around a certain fixed axis or point. It is the product of the force and the distance from the point of application of the force to the center of rotation (or called the lever arm), usually represented by the symbol τ. In the International System of Units, the unit of torque is Newton-meter (Nm). Specifically, the magnitude of the torque is equal to the magnitude of the applied force multiplied by the length of the lever arm. In daily life, common examples of torque include the moment when using a wrench to tighten a screw or the moment output from the engine to the crankshaft.

[0048] 2) Valve: A valve is a fluid control device used to open or close the fluid flow in a pipeline system, or to regulate the fluid flow rate and direction. The valve can be fully opened or fully closed as needed, or in an intermediate position to regulate the flow rate. Valves are widely used in various industrial and civil applications, such as water supply, gas transmission, chemical production, etc.

[0049] 3) Valve stem: The valve stem is an important component in the valve. It is usually a slender metal rod passing through the sealing part of the valve body and connecting to the operating device of the valve (such as a handwheel, electric actuator, etc.). The main function of the valve stem is to transmit the operating force to the valve body and drive the valve to open or close. During operation, the valve stem needs to maintain good sealing performance to prevent medium leakage.

[0050] 4) Valve body: The valve body refers to the main part of the valve. It is the load-bearing structure of the valve and contains key components such as valve seats, valve flaps (or valve plates), and seals. The valve body is usually made of metal (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 functions and performance of the valve, such as the tightness of closing, pressure resistance, corrosion resistance, etc. The valve stem is connected to the valve body, and through the movement of the valve stem, the valve flap or valve plate of the valve body will move, thus realizing the function of opening or closing the fluid.

[0051] 5) Fiber Bragg grating demodulator: A fiber Bragg grating demodulator is an instrument used to read and analyze the signals collected by fiber Bragg grating torque sensors. The fiber Bragg grating torque sensor modulates the Bragg wavelength of the fiber Bragg grating through external physical parameters (such as temperature, strain, pressure, etc.), thus generating a wavelength change related to the measured physical quantity. The role of the fiber Bragg grating demodulator is to accurately measure these wavelength changes and convert these changes into electrical signals or digital signals for subsequent data processing and analysis. It usually includes a light source, a wavelength detector, a signal processor, etc., and can realize real-time monitoring and acquisition of the signals of multiple fiber Bragg grating torque sensors.

[0052] 6) Fiber Bragg grating torque sensor: A fiber Bragg grating torque sensor is a fiber Bragg grating torque sensor developed based on fiber Bragg grating technology for measuring the magnitude of torque (torsional moment). This fiber Bragg grating torque sensor usually writes a special grating structure on the optical fiber. When the optical fiber is subjected to torque, the period of the grating will change, thus causing a change in the Bragg wavelength. This wavelength change is proportional to the magnitude of the torque, so the torque can be accurately measured by detecting the change in the Bragg wavelength. Due to its advantages of high sensitivity, anti-electromagnetic interference, small size, and corrosion resistance, the fiber Bragg grating torque sensor has a wide range of applications in fields such as aerospace, automotive manufacturing, and robot control.

[0053] In the implementation process of the embodiments of the present application, the applicant found the following problems in the related art:

[0054] In the related art, for the torque detection of the valve stem, an electrical signal sensor is usually installed 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. Since the electrical signal sensor is easily affected by electromagnetic interference, the detection accuracy of the torque in the related art is relatively low.

[0055] The embodiments of the present application provide a method, system, device, electronic device, computer-readable storage medium, and computer program product for torque detection of a valve, which can effectively improve the torque detection accuracy of the valve stem while ensuring the normal operation of the valve stem. The following describes an exemplary application of the torque detection system for the valve provided by the embodiments of the present application.

[0056] See Figure 1 , Figure 1 FIG. is a schematic architecture diagram of the torque detection system 100 provided by the embodiments of the present application. The terminal (exemplarily shows the terminal 400) is connected to the server 200 through the network 300. The network 300 can be a wide area network, a local area network, or a combination of both.

[0057] The terminal 400 is used for the user to use the client 410 to display the torque of the valve to be detected on the graphical interface 410-1 (exemplarily shows the graphical interface 410-1). The terminal 400 and the server 200 are connected to each other through a wired or wireless network.

[0058] In some embodiments, the server 200 can be an independent physical server, or 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 communications, middleware services, domain name services, security services, Content Delivery Network (CDN), and big data and artificial intelligence platforms. The terminal 400 can be a smart phone, a tablet computer, a laptop computer, a desktop computer, a smart speaker, a smart TV, a smart watch, a vehicle-mounted terminal, etc., but is not limited thereto. The electronic device provided by the embodiments of the present application can be implemented as a terminal or a server. The terminal and the server can be directly or indirectly connected through a wired or wireless communication method, which is not limited in the embodiments of the present application.

[0059] See Figure 2 , Figure 2 FIG. is a schematic structural diagram of the electronic device 500 for detecting torque provided by the embodiments of the present application, where Figure 2 The shown electronic device 500 can be Figure 1The server 200 or the terminal 400 in Figure 2 The electronic device 500 shown 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 achieve connection and communication between these components. In addition to the data bus, the bus system 440 also includes a power bus, a control bus, and a status signal bus. However, for the sake of clarity, the bus system 440 is not described in detail. Figure 2 Various buses are labeled as bus system 440 .

[0060] The 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., where the general-purpose processor can be a microprocessor or any conventional processor, etc.

[0061] The memory 450 may be removable, non-removable, or a combination thereof. Exemplary hardware devices include solid-state memory, hard drives, optical drives, etc. The memory 450 may optionally include one or more storage devices that are physically remote from the processor 430.

[0062] The memory 450 includes a volatile memory or a non-volatile memory, and may also include both volatile and non-volatile memories. The non-volatile memory may be a read-only memory (ROM), and the volatile memory may be a random access memory (RAM). The memory 450 described in the embodiments of the present application is intended to include any suitable type of memory.

[0063] In some embodiments, memory 450 can store data to support various operations, examples of which include programs, modules, and data structures, or a subset or superset thereof, as exemplarily described below.

[0064] Operating system 451, including system programs for processing various basic system services and performing hardware-related tasks, such as a framework layer, a core library layer, a driver layer, etc., for implementing various basic services and processing hardware-based tasks;

[0065] A network communication module 452 for reaching other electronic devices via one or more (wired or wireless) network interfaces 420. Exemplary network interfaces 420 include: Bluetooth, Wireless Fidelity (WiFi), and Universal Serial Bus (USB), etc.

[0066] In some embodiments, the torque detection device for a valve provided in the embodiments of the present application can be implemented in software. Figure 2 Shown is the torque detection device 455 for a valve stored in the memory 450, which can be software in the form of a program and plug-ins, etc., including the following software modules: a detection module 4551, a determination module 4552, and an acquisition module 4553. These modules are logical, so they can be combined arbitrarily or further split according to the functions implemented. The functions of each module will be described below.

[0067] In other embodiments, the torque detection device for a valve provided in the embodiments of the present application can be implemented in hardware. As an example, the torque detection device for a valve provided in the embodiments of the present application can be a processor in the form of a hardware decoding processor, which is programmed to execute the torque detection method for a valve provided in the embodiments of the present application. For example, a processor in the form of a hardware decoding processor can employ 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.

[0068] In some embodiments, a terminal or a server can implement the torque detection method for a valve provided in the embodiments of the present application by running a computer program or computer-executable instructions. For example, the computer program can be a native program in an operating system (such as a dedicated detection program) or a software module. For example, it can be a detection module embedded in any program (such as an instant messaging client, an album program, an electronic map client, a navigation client); for example, it can be a Native application (APP), that is, a program that needs to be installed in the operating system to run. In short, the above computer program can be any form of application program, module, or plug-in.

[0069] The torque detection method for a valve provided in an embodiment of the present application will be described in conjunction with an exemplary application and implementation of a server or terminal provided in an embodiment of the present application.

[0070] See also Figure 3 , Figure 3 The flow chart of the torque detection method of the valve provided in the embodiment of the present application is as follows Figure 1 , will combine Figure 3 Steps 101 to 103 are shown for illustration. The torque detection method for a valve provided in the embodiment of the present application can be implemented by a server or a terminal alone, or by a server and a terminal in collaboration. The following description will be made using the server alone as an example.

[0071] In step 101, detection data of a valve to be detected is obtained.

[0072] In some embodiments, the detection data of the valve to be detected is obtained by detecting a fiber grating torque sensor installed on the valve stem of the valve to be detected, and the fiber grating torque sensor may be a fiber grating torque sensor.

[0073] In some embodiments, the detection data may include valve stem motion data, including the displacement, velocity, and acceleration of the valve stem, which reflect the opening and closing motion of the valve. Torque data: Measures the torque applied to the valve stem, which is a key parameter for driving the valve open or closed. Stress data: The stress distribution of the valve stem when it is stressed, which can reflect the strength and integrity of the valve stem. Vibration data: Vibration of the valve stem and valve assembly during operation, which may indicate an imbalance or potential failure in the system.

[0074] 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, and the above step 101 can be implemented by 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.

[0075] In some embodiments, the first fiber Bragg grating torque sensor and the second fiber Bragg grating torque sensor are fiber Bragg grating torque sensors, which are a new type of fiber Bragg grating torque sensor based on fiber Bragg grating technology. It uses the change of the reflection or transmission characteristics of the fiber Bragg grating to sense the change of external environmental parameters. The fiber Bragg grating torque sensor has the characteristics of strong anti-interference ability and high sensitivity. The fiber Bragg grating torque sensor can determine the change of torque by detecting the center wavelength offset.

[0076] In some embodiments, the first detection data is detected by a first fiber Bragg grating torque sensor (first fiber Bragg grating torque sensor) installed 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, stress, etc. The second detection data is detected by a second fiber Bragg grating torque sensor (second fiber Bragg grating torque sensor) installed on the valve stem. This fiber Bragg grating torque sensor may also be used to measure a physical quantity different from that of the first fiber Bragg grating torque sensor, or for redundant monitoring to increase the reliability of the system.

[0077] In some embodiments, for the acquisition of the first detection data, the first fiber Bragg grating torque sensor is a fiber Bragg grating torque sensor installed at the driving end of the valve stem and is used to measure the torque generated when the valve stem rotates. When the valve stem rotates and applies torque, the fiber Bragg grating will undergo minute twists and deformations, which will cause a shift in its central wavelength. Light emitted by a broadband light source passes through the fiber Bragg grating, and the grating reflects light of a specific wavelength according to the applied torque. A photodetector or a spectral analyzer is used to monitor the central wavelength of the reflected light. The photodetector converts the wavelength information of the reflected light into an electrical signal, which is then recorded by a data acquisition system. The recorded central wavelength shift is used as the first detection data to determine the torque value of the valve stem at a specific time point.

[0078] In some embodiments, for the acquisition of the second detection data, the second fiber Bragg grating torque sensor is another fiber Bragg grating torque sensor installed on the valve stem to provide redundant measurement of torque or to monitor the torque at different locations. Similar to the first fiber Bragg grating torque sensor, when the valve stem rotates, the second fiber Bragg grating torque sensor also records the central wavelength shift due to torque. The central wavelength of the reflected light from the second fiber Bragg grating is monitored using a photodetector or a spectral analyzer. The monitored wavelength information is converted into an electrical signal and processed by a data acquisition system. The recorded central wavelength shift is the second detection data, which is used to determine the torque value of the valve stem at another location or time point.

[0079] 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 quantity of the valve to be detected is determined.

[0080] In some embodiments, fiber Bragg grating torque sensor parameters refer to a series of values ​​or characteristics that define and describe the performance characteristics of fiber Bragg grating torque sensors during their design and use. In this example, the fiber Bragg grating torque sensor parameters refer to the strain sensitivity of the fiber Bragg grating torque sensor. Strain sensitivity is an important parameter of the fiber Bragg grating torque sensor, which describes the degree of response of the output signal (such as light intensity, phase, etc.) of the fiber Bragg grating torque sensor to strain changes. Strain sensitivity is usually expressed as the output change per unit length or unit strain. The role of strain sensitivity, strain sensitivity determines the ability of the fiber Bragg grating torque sensor to detect strain changes on the valve stem. Highly sensitive fiber Bragg grating torque sensors can detect tiny strain changes, which is very important for accurately measuring valve stem torque. Torque calculation By multiplying the detected strain data with the strain sensitivity of the fiber Bragg grating torque sensor, a quantity proportional to the torque can be obtained. This quantity can be regarded as a reference quantity for torque because it reflects the torque borne by the valve stem.

[0081] In some embodiments, the strain sensitivity of the fiber Bragg grating torque sensor is a key parameter of the fiber Bragg grating torque sensor, which describes the response degree of the output signal of the fiber Bragg grating torque sensor to the strain change. The strain sensitivity refers to the ratio of the change amount of the output signal of the fiber Bragg grating torque sensor to the detected strain change amount. This ratio is usually expressed by the output change per microstrain (με) or per micrometer (μm). For example, if the strain sensitivity is 1 pm / με, it means that for every additional microstrain, the output optical signal of the fiber Bragg grating torque sensor will change by 1 picometer (pm). The calculation of the strain sensitivity is usually based on the physical properties of the fiber Bragg grating, including the grating period, material properties (such as the elasto-optic coefficient), and the geometric structure of the fiber Bragg grating torque sensor. In practical applications, the strain sensitivity can be determined through a calibration process, that is, by applying a known amount of strain and measuring the corresponding change in the output signal. The smaller the grating period, the higher the strain sensitivity usually is. Fiber Bragg gratings made of different materials have different elasto-optic coefficients, which will affect the strain sensitivity. The packaging method of the fiber Bragg grating torque sensor will also affect its strain sensitivity. The strain sensitivity is a key indicator of the torque measurement ability of the fiber Bragg grating torque sensor. By measuring the strain and using the strain sensitivity to convert the strain into torque, the torque borne by the valve stem or other mechanical components can be accurately determined. The strain sensitivity is crucial for evaluating the performance of the fiber Bragg grating torque sensor. A fiber Bragg grating torque sensor with high sensitivity can detect smaller strain changes, which is crucial for applications that require high-precision measurements. The strain sensitivity is used in the calibration and verification processes of the fiber Bragg grating torque sensor to ensure that the output of the fiber Bragg grating torque sensor is proportional to the actual strain. The strain sensitivity of the fiber Bragg grating torque sensor is a parameter that describes the response degree of the fiber Bragg grating torque sensor to the strain change, and it is the basis for torque measurement. By accurately measuring the strain and using the strain sensitivity, the fiber Bragg grating torque sensor can provide high-precision torque data, which is crucial for monitoring the health status of mechanical components, optimizing operations, and ensuring system safety.

[0082] In some embodiments, step 102 above can be implemented in the following manner: based on at least one of the first detection data and the second detection data, and the fiber Bragg grating torque sensor parameters, determine the first torque reference quantity of the valve to be detected.

[0083] In some embodiments, refer to Figure 4 , Figure 4 is the flowchart of the valve torque detection method provided by the embodiments of the present application Figure 2 , Figure 3 The step 102 shown in Figure 4 can be implemented by the steps 1021 to 1023 shown in

[0084] In step 1021, obtain the detection time of the detection data and determine the temperature influence factor of the valve to be detected at the detection time.

[0085] In some embodiments, the temperature influence factor is used to indicate whether the temperature will affect the detection of the fiber Bragg grating torque sensor.

[0086] In some embodiments, the temperature influence factor is used to indicate whether the temperature will affect the detection of the first fiber Bragg grating torque sensor and the second fiber Bragg grating torque sensor.

[0087] In some embodiments, by obtaining the detection times of the first detection data and the second detection data and determining the temperature influence factor, it helps to evaluate whether the temperature change has affected the measurement results of the fiber Bragg grating torque sensor. The detection time refers to the accurate time points when the first fiber Bragg grating torque sensor and the second fiber Bragg grating torque sensor collect the first detection data and the second detection data. The time points are usually synchronously recorded by the data acquisition system to ensure synchronization with the clock of the data acquisition card, and the detection times of the first detection data and the second detection data are the same.

[0088] In some embodiments, the detection time can be determined in the following ways: timestamp synchronization to ensure that the timestamps of all fiber Bragg grating torque sensors and the data acquisition system are synchronized, which is usually achieved through a central clock or the Network Time Protocol (NTP); real-time acquisition, when the fiber Bragg grating torque sensor detects a change in the physical quantity, the data acquisition system records the data and the timestamp in real time; log recording, the data and the timestamp are recorded in the data log for subsequent analysis.

[0089] In some embodiments, the temperature impact factor is used to evaluate whether temperature changes have a significant impact on the measurement results of the first fiber Bragg grating torque sensor and the second fiber Bragg grating torque sensor. The following describes the methods for centrally determining the temperature impact factor: Through ambient temperature measurement, at the detection moment, record the temperature of the environment where the valve stem is located, which is usually accomplished by an additional temperature fiber Bragg grating torque sensor. Analyze the temperature response of the fiber Bragg grating torque sensor to understand and evaluate the sensitivity of each fiber Bragg grating torque sensor to temperature changes. Fiber Bragg grating torque sensors usually have a certain response to temperature changes, but this may affect the accuracy of their measurement of other physical quantities. Conduct data comparison and analysis to compare the temperature changes, and compare the ambient temperature at the detection moment with the response of the fiber Bragg grating torque sensor under standard conditions. Check whether the reading deviation of the first fiber Bragg grating torque sensor and the second fiber Bragg grating torque sensor when the temperature changes exceeds their error range or a preset threshold. Based on the above analysis, a temperature impact factor can be calculated. For example: If the impact of temperature changes on the readings of the fiber Bragg grating torque sensor is small, the temperature impact factor may be close to 1, indicating that the impact of temperature on the measurement results can be ignored. If the impact of temperature changes on the readings of the fiber Bragg grating torque sensor is large, the temperature impact factor will deviate from 1, indicating that temperature correction needs to be performed on the measurement results. If the temperature impact factor indicates that temperature has a significant impact on the readings of the fiber Bragg grating torque sensor, temperature correction needs to be performed on the data, and then verify by comparing the corrected data with the expected value or historical data.

[0090] In some embodiments, the temperature impact factor refers to a parameter or coefficient used to evaluate the degree of influence of temperature changes on the measurement results of the fiber Bragg grating torque sensor under certain conditions. The temperature impact 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 temperature will have an impact on the measurement results of the fiber Bragg grating torque sensor at a specific detection moment, thereby guiding necessary adjustments to ensure the accuracy of the data.

[0091] In step 1022, when the temperature impact factor indicates that the temperature will affect the detection of the fiber Bragg grating torque sensor, based on the first detection data, the second detection data, and the parameters of the fiber Bragg grating torque sensor, determine the first torque reference amount of the valve to be detected.

[0092] In some embodiments, when temperature affects the detection of the fiber Bragg grating torque sensor, it means that temperature changes will affect the output of the fiber Bragg grating torque sensor, which may lead to inaccurate torque measurement. In this case, it is necessary to consider the temperature influence factor and adjust the torque measurement result according to the first detection data, the second detection data, and the fiber Bragg grating torque sensor parameters to obtain a more accurate first torque reference quantity. 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 influence of temperature on the output of the fiber Bragg grating torque sensor.

[0093] In some embodiments, the above step 1022 can be implemented in the following manner: 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 parameters. Multiply the first coefficient by the fiber Bragg grating torque sensor parameters to obtain the first fiber Bragg grating torque sensor parameters; Determine the ratio of the difference to the first fiber Bragg grating torque sensor parameters as the first torque reference quantity of the valve to be detected.

[0094] In some embodiments, the temperature influence factor is an index 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 the temperature will affect the detection of the fiber Bragg grating torque sensor, then special processing methods need to be adopted to ensure the accuracy of torque measurement. When the temperature influence exists, first, it is necessary to determine the difference between the first detection data and the second detection data. Here, the first detection data and the second detection data can refer to the data collected by two fiber Bragg grating torque sensors (such as the first fiber Bragg grating torque sensor and the second fiber Bragg grating torque sensor). Then, it is necessary to obtain the first coefficient of the fiber Bragg grating torque sensor parameters. This coefficient is related to the characteristics of the fiber Bragg grating torque sensor and may be the strain sensitivity or other parameters related to torque measurement. Multiply the obtained first coefficient by the fiber Bragg grating torque sensor parameters to obtain the so-called first fiber Bragg grating torque sensor parameters. This parameter is used to adjust the detection data to more accurately reflect the actual torque. Calculate the first torque reference quantity of the valve to be detected. This is achieved through the following steps: Divide the calculated difference by the obtained first fiber Bragg grating torque sensor parameters to obtain a ratio. This ratio is determined as the first torque reference quantity of the valve to be detected.

[0095] As an example, the expression of the above first torque reference quantity can be:

[0096]

[0097] where t is used to indicate the first torque reference quantity, Kε Used to indicate the parameters of the fiber Bragg grating torque sensor, is used to indicate the first coefficient, Δλ1 is used to indicate the first detection data, and Δλ2 is used to indicate the second detection data.

[0098] In this way, when the temperature affects the detection of the fiber Bragg grating torque sensor, by using the difference between the first detection data and the second detection data and combining the first coefficient of the fiber Bragg grating torque sensor parameters, the interference of temperature change on torque measurement can be effectively eliminated, the accuracy and stability of torque measurement are improved, which helps to more precisely monitor and adjust the operation of the valve, and ensure the stable operation of the valve in a temperature fluctuation environment. At the same time, this method reduces the influence of temperature change on the output signal of the fiber Bragg grating torque sensor, reduces the risk of system failure, and improves the reliability and safety of the system. In addition, by calculating the ratio of the difference to the fiber Bragg grating torque sensor parameters, the obtained torque reference quantity is closer to the actual torque value, which helps to optimize the valve control strategy, improve the energy utilization efficiency, and reduce the operating cost.

[0099] In step 1023, when the temperature influence factor indicates that the temperature will not affect the detection of the fiber Bragg grating torque sensor, based on any one of the first detection data and the second detection data, and the fiber Bragg grating torque sensor parameters, determine the first torque reference quantity of the valve to be detected.

[0100] In some embodiments, the above step 1023 can be implemented in the following manner: determine any one of the first detection data and the second detection data as the target detection data, obtain the second coefficient of the fiber Bragg grating torque sensor parameters, multiply the second coefficient by the fiber Bragg grating torque sensor parameters to obtain the second fiber Bragg grating torque sensor parameters; determine the ratio of the target detection data to the second fiber Bragg grating torque sensor parameters as the first torque reference quantity of the valve to be detected.

[0101] 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 detected. Since temperature does not affect the detection of the fiber Bragg grating torque sensor, any one of 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 the data. The second coefficient is a parameter related to the torque measurement characteristics of the fiber Bragg grating torque sensor, which may be the strain sensitivity or other related conversion factors. This coefficient is usually determined through the calibration process, and it describes the relationship between the output signal of the fiber Bragg grating torque sensor and the actual torque. Multiply the second coefficient by the fiber Bragg grating torque sensor parameter to obtain the second fiber Bragg grating torque sensor parameter. This parameter is used to convert the detected signal into the actual torque value. Divide the target detection data by the second fiber Bragg grating torque sensor parameter, and the obtained ratio is the first torque reference value of the valve to be detected, and this ratio directly reflects the actual torque on the valve stem.

[0102] As an example, the expression of the above first torque reference value can be:

[0103]

[0104] where t is used to indicate the first torque reference value, K ε is used to indicate the fiber Bragg grating torque sensor parameter, is used to indicate the second coefficient, Δλ B is used to indicate the second detection data or the first detection data.

[0105] In this way, when temperature has no effect on the detection of the fiber Bragg grating torque sensor, the advantage of the simplified torque measurement is that it can quickly and directly provide the torque reference value, eliminating the need for temperature correction, thereby improving the efficiency and accuracy of the measurement process. By selecting any one of the detection data as the target detection data and combining the second coefficient of the fiber Bragg grating torque sensor parameter, the torque reference value can be quickly calculated, thus providing immediate data support for the monitoring and control of the valve. This method reduces the complexity of system design and operation, reduces potential error sources, and improves the overall reliability of the system. Therefore, when the temperature is stable or the influence of temperature change on the output of the fiber Bragg grating torque sensor is negligible, it can effectively ensure the accuracy of torque measurement, and helps to optimize valve operation and maintenance, improving system performance.

[0106] Thus, by obtaining the detection time of the detection data and determining the temperature influence factor of the valve to be detected, 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, a method based on the first detection data, the second detection data, and the parameters of the fiber Bragg grating torque sensor is used to determine the torque reference quantity, which can eliminate the error caused by temperature changes and thus improve the accuracy of torque measurement. This method can ensure that even in an environment with large temperature changes, the monitoring and control of valve operation still maintain high precision. When the temperature influence factor indicates that the temperature will not affect the detection of the fiber Bragg grating torque sensor, a method based on the first detection data or the second detection data and the parameters of the fiber Bragg grating torque sensor is used to determine the torque reference quantity, which can simplify the calculation process and improve 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 error sources, and improves the overall reliability of the system. Therefore, whether the temperature influence exists or not, by obtaining the detection time and the temperature influence factor in real time and adopting the corresponding torque measurement method, the accuracy, efficiency, and reliability of torque measurement can be effectively ensured, providing accurate data support for the monitoring and control of the valve and improving the system performance.

[0107] In step 103, obtain the stem parameters of the valve stem, and based on the stem parameters and the first torque reference quantity, determine the torque of the valve to be detected.

[0108] In some embodiments, the above-mentioned stem parameters include the shear modulus of elasticity of the material of the valve stem and the diameter at the target position of the valve stem, and the target position is the installation position of the fiber Bragg grating torque sensor on the valve stem.

[0109] In some embodiments, in torque measurement, the shear modulus of elasticity, the valve stem diameter, and pi are key parameters for calculating the torsional angle and torque of the valve stem. The shear modulus of elasticity is a physical property of the material, which describes the response of the material when subjected to shear stress. It is a constant and is fixed for a specific material. The valve stem diameter is the diameter of the valve stem at the installation position of the fiber Bragg grating torque sensor. This parameter is an important dimension for calculating torque. Pi (π) is a mathematical constant, approximately equal to 3.14159, which is used to calculate the circumference and area of a circle.

[0110] In some embodiments, the above step 103 can be implemented in the following manner: determine the product of the shear modulus of elasticity, the diameter, and pi as the second torque reference quantity, and determine the product of the first torque reference quantity and the second torque reference quantity as the torque of the valve to be detected.

[0111] In some embodiments, multiplying the shear modulus of elasticity (G), the stem diameter (d), and the pi (π) can obtain a parameter called the second torque reference quantity. Multiplying the first torque reference quantity and the second torque reference quantity can obtain the torque of the valve to be detected. Here, the first torque reference quantity may be a torque value directly measured or indirectly calculated by a fiber Bragg grating torque sensor, while the second torque reference quantity is a torque coefficient related to the stem material and size.

[0112] As an example, the expression for the torque of the valve to be detected described above can be:

[0113]

[0114] where T is used to indicate the torque of the valve to be detected, G is used to indicate the shear modulus of elasticity, D 3 is used to indicate the diameter of the valve to be detected, and t is used to indicate the first torque reference quantity.

[0115] As an example, the expression for the torque of the valve to be detected described above can be:

[0116]

[0117] where T is used to indicate the torque of the valve to be detected, G is used to indicate the shear modulus of elasticity, D 3 is used to indicate the diameter of the valve to be detected, and t is used to indicate the first torque reference quantity.

[0118] As an example, in an industrial pipeline system, a valve needs to monitor the torque when it is opened and closed, and a fiber Bragg grating torque sensor is installed on the valve stem. When the valve is operated (such as opened or closed), the fiber Bragg grating torque sensor detects the torque data on the valve stem in real time. The detected data is sent to the control system through the fiber Bragg grating torque sensor. The control system receives the fiber Bragg grating torque sensor data and uses the fiber Bragg grating torque sensor parameters (such as strain sensitivity) of the fiber Bragg grating torque sensor to adjust the detected data. According to the fiber Bragg grating torque sensor data, the first torque reference quantity is determined. The valve stem parameters of the valve stem are obtained, including the shear modulus of elasticity G of the material and the diameter d at the target position. Using the valve stem parameters and the first torque reference quantity, the valve torque is calculated.

[0119] As an example, for the exhaust pipe valve control of an automotive engine, in an automotive engine, a valve for regulating the exhaust gas flow needs to be precisely controlled. An optical fiber grating torque sensor is installed on the valve stem of the exhaust pipe valve. When the engine is running, the optical fiber grating torque sensor detects the torque changes of the valve during the opening and closing processes. The detection data is transmitted through the optical fiber grating torque sensor to the engine control unit, which receives the data from the optical fiber grating torque sensor and processes the data using the parameters of the optical fiber grating torque sensor. Based on the data from the optical fiber grating torque sensor, a first torque reference value is determined, the valve stem parameters of the valve stem are obtained, including the shear modulus of elasticity and the diameter at the target position, and the valve torque is calculated using the valve stem parameters and the first torque reference value.

[0120] In this way, by obtaining the detection data of the valve to be detected, which is detected by the optical fiber grating torque sensor installed on the valve stem of the valve to be detected, based on the detection data and the optical fiber grating torque sensor parameters of the optical fiber grating torque sensor, a first torque reference value of the valve to be detected is determined, the valve stem parameters of the valve stem are obtained, and based on the valve stem parameters and the first torque reference value, the torque of the valve to be detected is determined. The optical fiber grating 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 to additionally install an optical fiber grating torque sensor between the two, reducing the installation complexity and the occupation of the valve stem space. Since the optical fiber grating torque sensor is directly installed on the valve stem, no additional installation space and structural support are required, thus reducing the torque detection accuracy problems caused by physical strength limitations. It not only relies on the detection data of the optical fiber grating torque sensor but also combines the physical parameters of the valve stem (such as the shear modulus of elasticity and the diameter), which are used to calculate and correct the torque value, improving the accuracy of the measurement results. By obtaining the detection data of the valve stem during the dynamic process, the torque changes of the valve stem can be monitored in real time, which is crucial for ensuring that the valve stem can still operate normally under extreme torque conditions. The utilization of the optical fiber grating torque sensor parameters helps to calibrate the optical fiber grating torque sensor, reduce errors, and ensure that the torque measurement is accurate and reliable even under different working conditions. The method of determining the torque by directly installing the optical fiber grating torque sensor on the valve stem, combining the optical fiber grating torque sensor parameters and the valve stem physical parameters, can provide higher-precision and more reliable torque detection without sacrificing the normal working ability of the valve stem. 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 torque detection accuracy of the valve stem while ensuring its normal operation.

[0121] In some embodiments, referring to Figure 5 and Figure 6 , Figure 5 is the structural schematic diagram of the valve stem provided by the embodiments of the present applicationFigure 1 , Figure 6 Schematic structure of the valve stem provided by the embodiment of the present application Figure 2 , The torque detection system of the valve includes: a valve, the valve includes a valve stem 3 and a valve body, the valve stem 3 is connected to the valve body, and the valve stem 3 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 ( Figure 5 and Figure 6 the fiber Bragg grating torque sensors 1 and 2 shown) and the valve stem, the fiber Bragg grating torque sensor ( Figure 5 and Figure 6 the fiber Bragg grating torque sensors 1 and 2 shown) is installed on the valve stem 3 of the valve, and the fiber Bragg grating torque sensor 1 is used to detect the detection data of the valve 3; a control mechanism, the control mechanism is connected to the valve stem 3 and is used to generate and transmit the operating force to the valve stem 3; a processing mechanism, the processing mechanism is connected to the fiber Bragg grating torque sensor ( Figure 5 and Figure 6 the fiber Bragg grating torque sensors 1 and 2 shown) and is used to receive and process the detection data detected by the fiber Bragg grating torque sensor ( Figure 5 and Figure 6 the fiber Bragg grating torque sensors 1 and 2 shown) when the valve stem 3 is in a moving state, and determine the torque of the valve based on the detection data.

[0122] In some embodiments, the valve includes a valve body: This is the main structural part of the valve and is used to control the flow of fluid. And a valve stem: a moving part connecting the valve body and is used to transmit an operating force to the valve body to control the opening and closing of the valve.

[0123] In some embodiments, see Figure 7 , Figure 7 is a schematic structural diagram of the torque detection system of the valve provided by the embodiment of the present application. The torque detection system of the valve includes: a valve, the valve includes a valve stem and a valve body, the valve stem is connected to the valve body, 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 ( Figure 7 the fiber Bragg grating torque sensors 1 and 2 shown) and the valve stem, the fiber Bragg grating torque sensor ( Figure 7The optical fiber grating torque sensors 1 and 2 shown are installed on the valve stem of the valve. The optical fiber grating torque sensors 1 and 2 are used to detect the detection data of the valve; a control mechanism, which is connected to the valve stem and is used to generate and transmit the operating force to the valve stem; a processing mechanism( Figure 7 such as the host computer shown), the processing mechanism is connected to the optical fiber grating torque sensor( Figure 7 such as the optical fiber grating torque sensors 1 and 2 shown) through an optical fiber grating demodulator and is used to receive and process the detection data detected by the optical fiber grating torque sensor( Figure 7 such as the optical fiber grating torque sensors 1 and 2 shown) when the valve stem is in a moving state, and determine the torque of the valve based on the detection data.

[0124] In some embodiments, referring to Figure 5 Figure 6 , the valve stem is a cylinder, the bottom surface of the optical fiber grating torque sensor fits with the surface of the cylinder, and the optical fiber grating torque sensors 1 and 2 are installed on the valve stem to detect the torque data during the operation of the valve. The optical fiber grating torque sensors 1 and 2 can be optical fiber grating torque sensors. The control mechanism is connected to the valve stem 3 and is used to generate and transmit the operating force. This can be a manual operation or an automatic control system, such as a motor driver.

[0125] In some embodiments, the processing mechanism is connected to the optical fiber grating torque sensors 1 and 2 and is used to receive and process the torque data detected by the optical fiber grating torque sensor when the valve stem 3 is moving. The processing mechanism may include a signal conditioning circuit, a data acquisition system, a calculation unit, etc., and is used to analyze the data of the optical fiber grating torque sensor and determine the torque of the valve. Based on the detection data, the processing mechanism can calculate the actual torque value of the valve and process and correct the data through an algorithm to obtain a more accurate torque reading. The processing mechanism can be the execution subject of the torque detection method of the valve stem provided in the embodiments of the present application.

[0126] 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. The optical fiber grating torque sensors 1 and 2 detect torque data during the movement of the valve stem 3. The detected data is transmitted to the processing mechanism through a connection line. The processing mechanism analyzes and processes the received data to determine the torque of the valve. The processing mechanism may also send the torque data to a control unit for monitoring and controlling the operation of the valve.

[0127] In some embodiments, the advantages of using a fiber Bragg grating torque sensor include high precision, electromagnetic interference resistance, corrosion resistance, and the ability to operate in harsh environments. This makes the fiber Bragg grating torque sensor an ideal choice for valve torque detection, especially in fields such as industrial automation, aerospace, and automotive. By monitoring the valve torque in real time, overuse or damage can be prevented, the service life of the valve can be extended, and the normal operation of the system can be ensured.

[0128] In some embodiments, referring to Figures 5 to 6 , the fiber Bragg grating torque sensor includes a first fiber Bragg grating torque sensor, which is installed on the valve stem of the valve and then coated with a metal protective shell 5, and forms a positive 45-degree angle with the axial direction of the valve stem; a second fiber Bragg grating torque sensor, which is installed on the valve stem of the valve and then coated with a metal protective shell 5, and forms a negative 45-degree angle with the axial direction of the valve stem; the fiber Bragg grating torque sensor parameters of the first fiber Bragg grating torque sensor and the second fiber Bragg grating torque sensor are the same, and the installation positions of the first fiber Bragg grating torque sensor and the second fiber Bragg grating torque sensor on the valve stem are different.

[0129] In some embodiments, the fiber Bragg grating torque sensor can be fixed to the valve stem by means of bonding or welding, and then the fiber Bragg grating sensor is coated with a metal protective shell.

[0130] In some embodiments, the fiber Bragg grating torque sensor parameters of the first fiber Bragg grating torque sensor 1 and the second fiber Bragg grating torque sensor 2 are the same, and the installation positions of the first fiber Bragg grating torque sensor 1 and the second fiber Bragg grating torque sensor 2 on the target valve stem section 4 are different.

[0131] In some embodiments, the fiber Bragg grating torque sensor 1 and the fiber Bragg grating torque sensor 2 are installed on this target valve stem section 4. This design enables the fiber Bragg grating torque sensor to be closely combined with the valve stem, reducing the design complexity caused by installation space limitations. The role of the metal protective shell 5 is to protect the fiber Bragg grating torque sensor and prevent the external environment from damaging the fiber Bragg grating torque sensor. The protective shell is connected to the edge of the target valve stem section, providing additional mechanical protection and environmental sealing.

[0132] In some embodiments, the first fiber Bragg grating torque sensor 1 and the second fiber Bragg grating torque sensor 2 are respectively installed at positive 45-degree and negative 45-degree angles to the axial direction of the valve stem 3. This angular installation is beneficial for measuring the stress and torque of the valve stem during rotation because the two fiber Bragg grating torque sensors can provide stress data at different angles.

[0133] In some embodiments, the fiber Bragg grating torque sensor 1 and the fiber Bragg grating torque sensor 2 are installed on the target valve stem section 4, and the size of the target valve stem section 4 matches the size of the fiber Bragg grating torque sensor to ensure the tightness and stability of the installation of the fiber Bragg grating torque sensor. Both the fiber Bragg grating torque sensor 1 and the fiber Bragg grating torque sensor 2 are fiber Bragg grating torque sensors. Due to its high sensitivity, anti-electromagnetic interference, high temperature and high pressure resistance and other characteristics, the fiber Bragg grating torque sensor is 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 axial direction of the valve stem 3, and the second fiber Bragg grating torque sensor 2 forms a negative 45-degree angle with the axial direction of the valve stem 3. This layout allows the fiber Bragg grating torque sensor to detect stress changes in different directions during the rotation of the valve stem, which helps to accurately calculate the torque. The installation positions of the sensor 1 and the fiber Bragg grating torque sensor 2 on the target valve stem section 4 are different, which can provide information about the torque distribution and increase the reference value of the data.

[0134] As an example, a large control valve in a chemical enterprise needs to accurately monitor the torque during its operation to ensure the normal operation of the valve and prevent equipment damage. The first fiber Bragg grating torque sensor 1 is encapsulated and installed on the target valve stem section 4, forming a positive 45-degree angle with the axial direction of the valve stem. When the valve stem is subjected to torque, the fiber Bragg grating torque sensor 1 will record the corresponding strain data. The second fiber Bragg grating torque sensor 2 is also encapsulated and installed on the target valve stem section 4, but forms a negative 45-degree angle with the axial direction of the valve stem. The fiber Bragg grating torque sensor 2 will also record the strain data, but in the opposite direction. The parameters of the fiber Bragg grating torque sensor 1 and the fiber Bragg grating torque sensor 2 are the same, but the installation positions are different, so that stress data at two different angles of the valve stem can be obtained. These data are used to calculate the torque of the valve stem. By comparing and analyzing the data of the two fiber Bragg grating torque sensors, the torque change of the valve stem during rotation can be more accurately determined. In a chemical enterprise, when the valve is operating, the torque of the valve stem can be monitored in real time to ensure that the operation of the valve does not exceed its designed safety limit. If abnormal torque is detected, the system can immediately issue an alarm and take measures to prevent equipment damage or production accidents.

[0135] Thus, the torque detection system of the valve can effectively measure the torque change of the valve stem during operation by installing two fiber Bragg grating torque sensors (the first fiber Bragg grating torque sensor and the second fiber Bragg grating torque sensor) on the valve stem, which are respectively at a positive 45-degree and a negative 45-degree angle with the axial direction of the valve stem. The fiber Bragg grating torque sensor parameters of the two fiber Bragg grating torque sensors are the same, but the installation positions are different, which can improve the accuracy and redundancy of torque measurement. When the valve is operating, the fiber Bragg grating torque sensors detect torque data, which are preprocessed and demodulated by a demodulator and then transmitted to a processing mechanism. The processing mechanism receives and processes these data to determine the torque of the valve. Such a design can provide accurate torque measurement, help monitor the operating state of the valve, prevent overuse or damage, extend the service life of the valve, and ensure the normal operation of the system. In addition, by using two fiber Bragg grating torque sensors and installing them at different angles, the system can better resist external interference, improve the stability and reliability of torque measurement, thus providing accurate data support for the monitoring and control of the valve and improving the system performance.

[0136] In some embodiments, the torque detection system of the valve further includes: a demodulator, and the processing mechanism and the fiber Bragg grating torque sensors ( Figures 5 to 6 the fiber Bragg grating torque sensor 1 and the fiber Bragg grating torque sensor 2 shown) are connected through the demodulator.

[0137] In some embodiments, the demodulator is configured to receive and preprocess the detection data detected by the fiber Bragg grating torque sensors ( Figures 5 to 6 the fiber Bragg grating torque sensor 1 and the fiber Bragg grating torque sensor 2 shown) when the valve stem is in the motion state, and send the preprocessed detection data to the processing mechanism for the determination of the torque.

[0138] In some embodiments, the demodulator plays a key role in the torque detection system of the valve. It is responsible for receiving the data of the fiber Bragg grating torque sensors and performing preprocessing, and then sending the processed data to the processing mechanism for further analysis and determination of the torque value. The demodulator receives the original detection data from the fiber Bragg grating torque sensor 1 and the fiber Bragg grating torque sensor 2. These data may contain torque changes caused by the movement of the valve stem. The demodulator preprocesses the original data, including steps such as amplification, filtering, and noise reduction. These processing steps are aimed at improving the signal-to-noise ratio of the data, enhancing the clarity and stability of the signal for subsequent processing and analysis. The signal output by the fiber Bragg grating torque sensor is a modulated optical signal, and the demodulator converts the modulated optical signal into an electrical signal and extracts specific information reflecting the torque change. This process is called demodulation. The demodulator sends the preprocessed and demodulated data to the processing mechanism. These data are ready for analysis to determine the torque of the valve.

[0139] In some embodiments, the demodulator may have the ability to monitor the data of the fiber Bragg grating torque sensor in real time to promptly detect abnormal or torque changes beyond the preset range. The demodulator may include a calibration function to ensure the accuracy of the data of the fiber Bragg grating torque sensor. This may involve calibrating the output of the fiber Bragg grating torque sensor to match known torque values. The demodulator may have an interface for communicating with other system components, such as communicating with a processing mechanism or a control system, to transmit torque data or receive control instructions.

[0140] In some embodiments, through preprocessing and demodulation, the demodulator can improve the accuracy and reliability of the data of the fiber Bragg grating torque sensor. The demodulator undertakes the tasks of data preprocessing and demodulation, simplifying the complexity of the processing mechanism. The demodulator can quickly process data, reducing the time for data processing, thereby improving the response speed of the entire system. The demodulator is an indispensable part of the valve torque detection system. It is responsible for receiving the data of the fiber Bragg grating torque sensor, performing necessary preprocessing and demodulation, and then sending the processed data to the processing mechanism. This design can improve the accuracy of the data and the efficiency of the system, ensuring the accurate measurement and control of the valve torque.

[0141] Thus, the torque detection system of the valve can effectively measure the torque change of the valve stem during operation by installing two fiber Bragg grating torque sensors (the first fiber Bragg grating torque sensor and the second fiber Bragg grating torque sensor) on the valve stem, with angles of +45 degrees and -45 degrees respectively with respect to the axial direction of the valve stem. The fiber Bragg grating torque sensor parameters of the two fiber Bragg grating torque sensors are the same, but the installation positions are different, which can improve the accuracy and redundancy of torque measurement. When the valve operates, the fiber Bragg grating torque sensor detects the torque data, which is preprocessed and demodulated by the demodulator and then transmitted to the processing mechanism. The processing mechanism receives and processes these data to determine the torque of the valve. The demodulator is used to receive and preprocess the data of the fiber Bragg grating torque sensor to ensure the accuracy and stability of the data, and then send the processed data to the processing mechanism. Such a design can provide accurate torque measurement, help monitor the operating state of the valve, prevent overuse or damage, extend the service life of the valve, and ensure the normal operation of the system. In addition, by using two fiber Bragg grating torque sensors installed at different angles and 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 the monitoring and control of the valve and improving the system performance.

[0142] Next, an exemplary application of the embodiments of the present application in a practical torque measurement application scenario will be described.

[0143] In the embodiments of the present application, a fiber Bragg grating torque sensor (FBG fiber Bragg grating torque sensor) is arranged on the surface of the valve stem along the direction at an angle of ±45° with the axis of the measured valve stem. According to the linear relationship between the valve stem torque and the central wavelength shift of the fiber Bragg grating torque sensor installed along the direction at an angle of ±45° with the valve stem axis, the measurement of the valve torque is realized.

[0144] On the surface of the valve stem, a fiber Bragg grating torque sensor is arranged along the direction at an angle of ±45° with the axis of the measured valve stem. By establishing the linear relationship between the valve stem torque and the central wavelength shift of any fiber Bragg grating torque sensor installed along the direction at an angle of ±45° with the valve stem axis, the valve torque can be obtained. Two fiber Bragg grating torque sensors (FBG1 and FBG2) with the same strain and temperature sensitivity are respectively arranged along the direction at an angle of ±45° with the axis of the measured valve stem ( Figure 5 ), which can solve the problem of strain and temperature cross-sensitivity of the fiber Bragg grating torque sensor for measuring the valve stem torque.

[0145] Two (metal-encapsulated) fiber Bragg grating torque sensors (FBG1 and FBG2) are fixed on the surface of the uniformly stressed section of the valve stem by means of gluing or welding along the direction at an angle of ±45° with the axis of the valve stem to be measured ( Figure 5 ). The valve stem torque is measured by measuring the maximum positive strain on the surface of the uniformly stressed section of the valve stem to be measured; the pigtail of the fiber Bragg grating torque sensor is connected to the fiber Bragg grating demodulator, and the fiber Bragg grating demodulator is connected to the upper computer; the actuator is used to drive the valve to be measured to act. When the valve to be measured acts, the upper computer collects the central wavelengths Δλ1 and Δλ2 of the fiber Bragg grating torque sensors (FBG1 and FBG2) through the fiber Bragg grating demodulator; when the temperature of the valve stem to be measured remains unchanged, according to the relationship between the central wavelength of the fiber Bragg grating torque sensor and the maximum positive strain on the surface of the uniformly stressed section of the valve stem to be measured, the valve stem torque T to be measured is calculated:

[0146]

[0147] Wherein, T is the valve stem torque to be measured; G is the shear modulus of elasticity of the material of the valve stem to be measured; D is the diameter of the uniformly stressed section of the valve stem to be measured; ΔλB is the central wavelength shift of the fiber Bragg grating torque sensor; Kε is the strain sensitivity of the fiber Bragg grating torque sensor.

[0148] In some embodiments, substituting the central wavelength Δλ1 or Δλ2 of the fiber Bragg grating torque sensors (FBG1 and FBG2) collected into ΔλB in the above formula, the valve stem torque to be measured under the constant temperature condition can be calculated. When the temperature of the valve stem to be measured changes, according to the relationship between the central wavelength shift of the fiber Bragg grating torque sensor and the maximum positive strain and temperature on the surface of the uniformly stressed section of the valve stem to be measured, the valve stem torque T to be measured is calculated:

[0149]

[0150] Among them, Δλ1 and Δλ2 are the central wavelength offsets of the fiber Bragg grating torque sensors FBG1 and FBG2, respectively.

[0151] Substituting the central wavelengths Δλ1 and Δλ2 of the fiber Bragg grating torque sensors (FBG1 and FBG2) collected above, the torque of the valve stem to be measured under the variable temperature condition can be calculated, solving the problem of cross-sensitivity between strain and temperature existing in the measurement of the valve stem torque by the fiber Bragg grating.

[0152] In some embodiments, referring to Figure 8 , Figure 8 is a graph showing the change of the central wavelength of the fiber Bragg grating torque sensor provided by the embodiment of the present application over time, Figure 8 specifically, it is the change of the central wavelength of the fiber Bragg grating torque sensor over time during four full open-close strokes of an electric ball valve, Figure 8 in Figure 8 A is the change of the central wavelength of the fiber Bragg grating torque sensor installed along +45° over time, Figure 8 B is the change of the central wavelength of the fiber Bragg grating torque sensor installed along +45° over time. Figure 8 in Figure 8 A and Figure 8 in Figure 8 B is the change of the central wavelength of the fiber Bragg grating torque sensor over time during the static characteristic test of the electric ball valve under 4 full open-close strokes. Since the two FBG fiber Bragg grating torque sensors are installed along the valve stem axis at +45° and -45° respectively, with opposite stress directions, the change trends of the central wavelengths of the two fiber Bragg grating torque sensors are roughly opposite.

[0153] In some embodiments, referring to Figure 9 , Figure 9 is a schematic diagram showing the relationship between the central wavelength of the fiber Bragg grating torque sensor provided by the embodiment of the present application and the valve stem torque, Figure 9 in Figure 9 a shown is the closing stroke of the valve stem: the fiber Bragg grating torque sensor is installed along +45°, Figure 9 in Figure 9 b shown is the opening stroke of the valve stem: the fiber Bragg grating torque sensor is installed along +45°. In the figure, Figure 9 c shown is the closing stroke of the valve stem, and the fiber Bragg grating torque sensor is installed along +45°, Figure 9 in Figure 9 d shown is the closing stroke of the valve stem: the fiber Bragg grating torque sensor is installed along +45°. Figure 9 in Figure 9(a)-(d) show the relationship between the central wavelength and torque of the fiber Bragg grating torque sensors installed along the positive and negative 45° of the axial direction of the ball valve stem during the 4 closing strokes and opening strokes, as well as the linear fitting curves. The corrected determination coefficients Adj.R2 of the linear regression equations of the linear fitting curves are all greater than 0.99, indicating that the fiber Bragg grating torque sensors have good linearity. When the wavelength of the fiber Bragg grating torque sensor does not change and the ammeter reading does not jump during the closing and opening processes, the average value of the Bragg wavelength within 20 s after pausing the action is taken as the Bragg wavelength value corresponding to the torque value measured by the commercial fiber Bragg grating torque sensor. Figure 9 in Figure 9 (a)-(d) The slope of the linear fitting curve represents the sensitivity of the fiber Bragg grating torque sensor. The FBG in the +45° direction is 0.715 pm / N·m, and the standard deviation does not exceed 0.0062 pm / N·m. The FBG in the -45° direction is 0.717 pm / N·m, and the standard deviation does not exceed 0.0063 pm / N·m.

[0154] Next, continue to describe the exemplary structure of the software module for implementing the torque detection device 455 of the valve provided in the embodiment of the present application. In some embodiments, as Figure 2 shown, the software module in the torque detection device 455 of the valve stored in the memory 450 may include: a detection module for obtaining the detection data of the valve to be detected, where the detection data of the valve to be detected is detected by a fiber Bragg grating torque sensor installed on the stem of the valve to be detected; a determination module for determining a first torque reference quantity of the valve to be detected based on the detection data and the fiber Bragg grating torque sensor parameters of the fiber Bragg grating torque sensor; an acquisition module for acquiring the stem parameters of the valve stem to be detected and determining the torque of the valve to be detected based on the stem parameters and the first torque reference quantity.

[0155] In some embodiments, the above fiber Bragg grating torque sensor includes a first fiber Bragg grating torque sensor and a second fiber Bragg grating torque sensor. The above 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 above determination module is further configured to determine a first torque reference quantity of the valve to be detected based on at least one of the first detection data and the second detection data and the fiber Bragg grating torque sensor parameters.

[0156] In some embodiments, the above-mentioned determination module is further configured to obtain the detection time of the detection data, and determine the temperature influence factor of the valve to be detected at the detection time, where 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, based on the first detection data, the second detection data, and the fiber Bragg grating torque sensor parameters, determine the first torque reference quantity of the valve to be detected; when the temperature influence factor indicates that the temperature will not affect the detection of the fiber Bragg grating torque sensor, based on any one of the first detection data and the second detection data, and the fiber Bragg grating torque sensor parameters, determine the first torque reference quantity of the valve to be detected.

[0157] In some embodiments, the above-mentioned determination module is further configured to 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 parameters, multiply the first coefficient by the fiber Bragg grating torque sensor parameters to obtain the first fiber Bragg grating torque sensor parameters; determine the ratio of the difference to the first fiber Bragg grating torque sensor parameters as the first torque reference quantity of the valve to be detected.

[0158] In some embodiments, the above-mentioned determination module is further configured to determine any one of the first detection data and the second detection data as the target detection data, and obtain the second coefficient of the fiber Bragg grating torque sensor parameters, multiply the second coefficient by the fiber Bragg grating torque sensor parameters to obtain the second fiber Bragg grating torque sensor parameters; determine the ratio of the target detection data to the second fiber Bragg grating torque sensor parameters as the first torque reference quantity of the valve to be detected.

[0159] In some embodiments, the valve stem parameters include the shear elastic modulus of the material of the valve stem and the diameter at the target position of the valve stem, where the target position is the installation position of the fiber Bragg grating torque sensor on the valve stem; the above-mentioned acquisition module is further configured to determine the product of the shear elastic modulus, the diameter, and pi as the second torque reference quantity, and determine the product of the first torque reference quantity and the second torque reference quantity as the torque of the valve to be detected.

[0160] An embodiment of the present application provides a computer program product, which includes a computer program or computer executable instructions, and the computer program or computer executable instructions are stored in a computer-readable storage medium. The processor of the electronic device reads the computer executable instructions from the computer-readable storage medium, and the processor executes the computer executable instructions, so that the electronic device executes the above-mentioned valve torque detection method of the embodiment of the present application.

[0161] An embodiment of the present application provides a computer-readable storage medium storing computer-executable instructions, where the computer-executable instructions are stored. When the computer-executable instructions are executed by a processor, the processor will be caused to execute the torque detection method of the valve provided by the embodiment of the present application. For example, as Figure 3 the torque detection method of the valve shown.

[0162] 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 disc, or CD-ROM; or it may be various electronic devices including one or any combination of the above memories.

[0163] In some embodiments, the computer-executable instructions may be in the form of a program, software, software module, script, 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 being deployed as an independent program or being deployed as a module, component, subroutine, or other unit suitable for use in a computing environment.

[0164] As an example, the computer-executable instructions may or may not correspond to a file in the file system, and may be stored as part of a file that stores other programs or data. For example, they may be stored in one or more scripts in a HyperText Markup Language (HTML) document, stored in a single file dedicated to the program being discussed, or stored in multiple cooperating files (such as files that store one or more modules, subroutines, or code portions).

[0165] As an example, the computer-executable instructions may be deployed to execute on one electronic device, or on multiple electronic devices located at one location, or, on multiple electronic devices distributed at multiple locations and interconnected by a communication network.

[0166] In summary, the embodiments of the present application have the following beneficial effects:

[0167] (1) By obtaining the detection data of the valve to be detected, which is detected by the fiber Bragg grating torque sensor installed on the valve stem of the valve to be detected, based on the detection data and the fiber Bragg grating torque sensor parameters of the fiber Bragg grating torque sensor, determine the first torque reference quantity of the valve to be detected, obtain the valve stem parameters of the valve stem, and based on the valve stem parameters and the first torque reference quantity, determine the torque of the valve to be detected. The fiber Bragg grating 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 to additionally install a fiber Bragg grating torque sensor between the two, reducing the installation complexity and the occupation of the valve stem space. Since the fiber Bragg grating torque sensor is directly installed on the valve stem, no additional installation space and structural support are required, thus reducing the torque detection accuracy problems caused by physical strength limitations. It not only relies on the detection data of the fiber Bragg grating torque sensor but also combines the physical parameters of the valve stem (such as shear modulus of elasticity and diameter), which are used to calculate and correct the torque value, improving the accuracy of the measurement result. By obtaining the detection data of the valve stem during the dynamic process, the torque change of the valve stem can be monitored in real time, which is crucial for ensuring that the valve stem can still operate normally under extreme torque conditions. The utilization of the fiber Bragg grating torque sensor parameters helps to calibrate the fiber Bragg grating torque sensor, reduce errors, and ensure that the torque measurement is accurate and reliable even under different working conditions. The method of determining the torque by directly installing the fiber Bragg grating torque sensor on the valve stem, combining the fiber Bragg grating torque sensor parameters and the valve stem physical parameters, can provide higher-precision and more reliable torque detection without sacrificing the normal working ability of the valve stem. 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 torque detection accuracy of the valve stem while ensuring its normal operation.

[0168] (2) When the temperature affects the detection of the fiber Bragg grating torque sensor, by using the difference between the first detection data and the second detection data and combining the first coefficient of the fiber Bragg grating torque sensor parameters, the interference of temperature change on torque measurement can be effectively eliminated, improving the accuracy and stability of torque measurement, which helps to more precisely monitor and adjust the operation of the valve, ensuring the stable operation of the valve in a temperature fluctuation environment. At the same time, this method reduces the influence of temperature change on the output signal of the fiber Bragg grating torque sensor, reduces the risk of system failure, and improves the reliability and safety of the system. In addition, by calculating the ratio of the difference to the fiber Bragg grating torque sensor parameters, the obtained torque reference quantity is closer to the actual torque value, which helps to optimize the valve control strategy, improve energy utilization efficiency, and reduce operating costs.

[0169] (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 provide the torque reference quantity quickly and directly, 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 quantity can be quickly calculated, providing immediate data support for the monitoring and control of the valve. This method reduces the complexity of system design and operation, reduces potential error sources, and improves the overall reliability of the system. Therefore, when the temperature is stable or the influence 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.

[0170] (4) By obtaining the detection time of the detection data and determining the temperature influence factor of the valve to be detected, 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 temperature will affect the detection of the fiber Bragg grating torque sensor, the method based on the first detection data, the second detection data, and the fiber Bragg grating torque sensor parameters is used to determine the torque reference quantity, which can eliminate the error caused by temperature change, thereby improving the accuracy of torque measurement. This method can ensure that even in an environment with large temperature changes, the monitoring and control of valve operation still maintain high precision. When the temperature influence factor indicates that temperature will not affect the detection of the fiber Bragg grating torque sensor, the method based on the first detection data or the second detection data and the fiber Bragg grating torque sensor parameters is used to determine the torque reference quantity, which can simplify the calculation process and improve the efficiency of data processing. It not only ensures the accuracy of torque measurement but also reduces the complexity of system design and operation, reduces potential error sources, and improves the overall reliability of the system. Therefore, whether the temperature influence exists or not, by obtaining 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 the monitoring and control of the valve and improving system performance.

[0171] (5) The torque detection system of the valve installs two fiber Bragg grating torque sensors (the first fiber Bragg grating torque sensor and the second fiber Bragg grating torque sensor) on the valve stem, with angles of +45 degrees and -45 degrees respectively with respect to the axial direction of the valve stem, which can effectively measure the torque change of the valve stem during operation. The fiber Bragg grating torque sensor parameters of the two fiber Bragg grating torque sensors are the same, but the installation positions are different, which can improve the accuracy and redundancy of torque measurement. When the valve is operating, the fiber Bragg grating torque sensors detect torque data, which are preprocessed and demodulated by a demodulator and then transmitted to the processing mechanism. The processing mechanism receives and processes these data to determine the torque of the valve. Such a design can provide accurate torque measurement, help monitor the operating state of the valve, prevent overuse or damage, extend the service life of the valve, and ensure the normal operation of the system. In addition, by using two fiber Bragg grating torque sensors and installing them at different angles, the system can better resist external interference, improve the stability and reliability of torque measurement, thereby providing accurate data support for the monitoring and control of the valve and improving the system performance.

[0172] (6) The torque detection system of the valve installs two fiber Bragg grating torque sensors (the first fiber Bragg grating torque sensor and the second fiber Bragg grating torque sensor) on the valve stem, with angles of +45 degrees and -45 degrees respectively with respect to the axial direction of the valve stem, which can effectively measure the torque change of the valve stem during operation. The fiber Bragg grating torque sensor parameters of the two fiber Bragg grating torque sensors are the same, but the installation positions are different, which can improve the accuracy and redundancy of torque measurement. When the valve is operating, the fiber Bragg grating torque sensors detect torque data, which are preprocessed and demodulated by a demodulator and then transmitted to the processing mechanism. The processing mechanism receives and processes these data to determine the torque of the valve. The demodulator is used to receive and preprocess the data of the fiber Bragg grating torque sensors, ensure the accuracy and stability of the data, and then send the processed data to the processing mechanism. Such a design can provide accurate torque measurement, help monitor the operating state of the valve, prevent overuse or damage, extend the service life of the valve, and ensure the normal operation of the system. In addition, by using two fiber Bragg grating torque sensors and installing them at different angles, as well as 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 the monitoring and control of the valve and improving the system performance.

[0173] As described above, it is only the embodiment of the present application and is not used to limit the protection scope of the present application. Any modifications, equivalent replacements, and improvements made within the spirit and scope of the present application are included in the protection scope of the present application.

Claims

1. A method for detecting the torque of a valve, characterized in that, The method includes: Obtaining the detection data of the valve to be detected, where the detection data of the valve to be detected is detected by a fiber Bragg grating torque sensor installed on the valve stem of the valve to be detected; Based on the detection data and the fiber Bragg grating torque sensor parameters of the fiber Bragg grating torque sensor, determining a first torque reference quantity of the valve to be detected; Obtaining the valve stem parameters of the valve stem, and based on the valve stem parameters and the first torque reference quantity, determining the torque of the valve to be detected.

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. The obtaining of the detection data of the valve to be detected includes: 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; The determining of the first torque reference quantity of the valve to be detected based on the detection data and the fiber Bragg grating torque sensor parameters of the fiber Bragg grating torque sensor includes: Based on at least one of the first detection data and the second detection data, and the fiber Bragg grating torque sensor parameters, determining the first torque reference quantity of the valve to be detected.

3. The method according to claim 2, wherein The determining of the first torque reference quantity of the valve to be detected based on at least one of the first detection data and the second detection data, and the fiber Bragg grating torque sensor parameters includes: Obtaining the detection time of the detection data, and determining the temperature influence factor of the valve to be detected at the detection time, where 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, based on the first detection data, the second detection data, and the fiber Bragg grating torque sensor parameters, determining the first torque reference quantity of the valve to be detected; When the temperature influence factor indicates that the temperature will not affect the detection of the fiber Bragg grating torque sensor, based on any one of the first detection data and the second detection data, and the fiber Bragg grating torque sensor parameters, determining the first torque reference quantity of the valve to be detected.

4. The method according to claim 3, characterized in that, The determining of the first torque reference quantity of the valve to be detected based on the first detection data, the second detection data, and the fiber Bragg grating torque sensor parameters includes: Determining the difference between the first detection data and the second detection data, and obtaining a first coefficient of the fiber Bragg grating torque sensor parameters, multiplying the first coefficient by the fiber Bragg grating torque sensor parameters to obtain first fiber Bragg grating torque sensor parameters; Determining the ratio of the difference to the first fiber Bragg grating torque sensor parameters as the first torque reference quantity of the valve to be detected.

5. The method according to claim 3, wherein The determining of the first torque reference quantity of the valve to be detected based on any one of the first detection data and the second detection data, and the fiber Bragg grating torque sensor parameters includes: Determine any one of the first detection data and the second detection data as the target detection data, and obtain a second coefficient of the fiber Bragg grating torque sensor parameters. Multiply the second coefficient by the fiber Bragg grating torque sensor parameters to obtain second fiber Bragg grating torque sensor parameters; Determine the ratio of the target detection data to the second fiber Bragg grating torque sensor parameters as the first torque reference quantity of the valve to be detected.

6. The method according to claim 1, wherein The valve stem parameters include the shear elastic modulus of the material of the valve stem and the diameter at the target position of the valve stem, and the target position is the installation position of the fiber Bragg grating torque sensor on the valve stem; Determining the torque of the valve to be detected based on the valve stem parameters and the first torque reference quantity includes: Determine the product of the shear elastic modulus, the diameter, and pi as the second torque reference quantity, and determine the product of the first torque reference quantity and the second torque reference quantity as the torque of the valve to be detected.

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

8. The system according to claim 7, wherein The valve stem is a cylinder, and the bottom surface of the fiber Bragg grating torque sensor fits the surface of the cylinder. The fiber Bragg grating torque sensor includes: A first fiber Bragg grating torque sensor, which is installed on the valve stem of the valve and then covered by a metal protective shell, and forms a positive 45-degree angle with the axis of the valve stem; A second fiber Bragg grating torque sensor, which is installed on the valve stem of the valve and then covered by the metal protective shell, and forms a negative 45-degree angle with the axis of the valve stem; The fiber Bragg grating torque sensor parameters of the first fiber Bragg grating torque sensor and the second fiber Bragg grating torque sensor are the same, and the installation positions of the first fiber Bragg grating torque sensor and the second fiber Bragg grating torque sensor on the valve stem are different.

9. The system according to claim 7, wherein The system further includes: A demodulator, the processing mechanism and the fiber Bragg grating torque sensor are connected through the demodulator; The demodulator is used to receive and preprocess the detection data detected by the fiber Bragg grating torque sensor when the valve stem is in the moving state, and send the preprocessed detection data to the processing mechanism for torque determination.

10. A torque detection device for a valve, characterized in that, The device includes: A detection module, configured to obtain detection data of a valve to be detected, where the detection data of the valve to be detected is detected by a fiber Bragg grating torque sensor installed on a valve stem of the valve to be detected; A determination module, configured to determine a first torque reference quantity of the valve to be detected based on the detection data and fiber Bragg grating torque sensor parameters of the fiber Bragg grating torque sensor; An acquisition module, configured to obtain valve stem parameters of the valve stem to be detected, and determine the torque of the valve to be detected based on the valve stem parameters and the first torque reference quantity.

11. An electronic device, characterized in that, The electronic device includes: A memory, configured to store computer-executable instructions or a computer program; A processor, configured to implement the torque detection method of the valve according to any one of claims 1 to 6 when executing the computer-executable instructions or the computer program stored in the memory.

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

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