Modularized whole-space-domain and whole-time-domain temperature and strain measuring device

Abstract

The utility model discloses a modularized whole-airspace and whole-time-domain temperature and strain measuring device, which relates to the technical field of heat transfer, computers, material science and communication and comprises a modularized temperature and strain measuring device, a signal generating device, a signal receiving device and a visualization device. The modular temperature and strain measurement device can be arranged on the surface or in a detected object, is used for measuring the temperature and strain values of the detected object, and comprises an isolation protection layer which is used for protecting an internal sensor; an optical signal emitted by the signal generating device is transmitted to the modularized temperature and strain measuring device through the transmission line, and the optical signal shifts in the transmission process under the action of the temperature and the strain of a detected object; and the signal receiving device receives the shifted optical signal and sends the optical signal to the visualization device. According to the utility model, the protection of the optical fiber sensor is realized through the arrangement of the isolation protection layer, and the modular integration of the sensor is realized through the modular temperature and strain measurement device.

Description

Technical Field

[0001] This utility model relates to the fields of heat transfer, computer, materials science, and communication technology, and more specifically to a modular full-space and full-time temperature and strain measurement device. Background Technology

[0002] Currently, furnaces and kilns in the metallurgical industry, reactors in the chemical industry, and other large-scale mechanical equipment in various industries generally face the problem of real-time monitoring of temperature and operating conditions (such as vibration and internal strain). This is especially true when monitoring temperature and strain in large spaces or surfaces. The uniformity of the temperature and stress fields in furnaces or reactors significantly affects the uniformity of the internal reaction process and the safety and stability of the equipment. Existing temperature and strain measurement devices mainly rely on point measurements using single thermocouples, strain gauge sensors, piezoelectric sensors, vacuum comparison monitoring sensors, smart coating sensors, and acoustic emission sensors to measure strain. These methods cannot achieve accurate measurement of temperature and strain over large areas under multi-physics field conditions. Therefore, developing technologies and devices that can achieve real-time and accurate measurement of temperature and strain over large areas under multi-physics field coupling conditions is key to solving these problems. Traditional fiber optic temperature sensing elements typically use a single optical fiber wound around the surface of the area to be measured. If any point is damaged, the entire fiber optic sensor becomes unusable.

[0003] Therefore, how to solve the problem that single fiber optic sensors are prone to damage and failure during measurement is a problem that urgently needs to be solved by those skilled in the art. Utility Model Content

[0004] In view of this, the present invention provides a modular full-space and full-time temperature and strain measurement device to solve the problems existing in the background art.

[0005] To achieve the above objectives, the present invention adopts the following technical solution:

[0006] A modular temperature and strain measurement device covering both spatial and temporal domains includes: a modular temperature and strain measurement device, a signal generator, a signal receiver, and a visualization device. The modular temperature and strain measurement device is used to measure the temperature and strain values ​​of a tested object and includes an insulating protective layer to protect the internal sensor. The signal generator emits an optical signal, which is transmitted to the modular temperature and strain measurement device via a transmission line. The optical signal is deflected during transmission under the influence of the temperature and strain of the tested object. The signal receiver receives the deflected optical signal and sends it to the visualization device.

[0007] Preferably, the isolation and protection layer includes a protective layer, a support layer, a buffer layer, a heat insulation / heat conduction layer, a sensor arrangement layer, and a sensor fixing device arranged sequentially from the outside to the inside, with each layer connected through an interface. The sensor arrangement layer includes a temperature sensor and a strain sensor.

[0008] Preferably, the support layer is any one of a metallic material, a non-metallic material, or a composite material, and its structure is in the form of a plate or a mesh.

[0009] Preferably, the buffer layer is an elastic material or a non-elastic material, wherein the elastic material is rubber or a spring, and the non-elastic material is foam or aerogel.

[0010] Preferably, the insulation layer isolates the external temperature from the temperature sensor detection process, and the heat conduction layer serves as a transition layer between the surface of the object being detected and the temperature and strain sensors when the surface of the object being detected is uneven.

[0011] Preferably, the temperature sensor includes optical and thermocouple types, the strain sensor adopts FBG strain temperature compensation and acceleration sensor, the temperature measurement range covers -197℃ to 1800℃, the strain measurement range is ±1500με, and the acceleration measurement range is 0.5-120Hz.

[0012] Preferably, the optical temperature sensor uses optical fibers made of different materials for distributed optical fiber temperature measurement or fiber optic grating temperature measurement; the arrangement of the temperature sensor and strain sensor on the arrangement layer can be any of the following forms: spiral, ring, S-shaped, straight, or latitude and longitude, depending on the detection requirements.

[0013] As can be seen from the above technical solution, compared with the prior art, this utility model discloses a modular full-space and full-time temperature and strain measurement device with a temperature measurement range covering -197℃ to 1800℃, which can meet the needs of various industrial scenarios from low temperature to high temperature and can comprehensively acquire the working status parameters of the equipment. By detecting the optical signal offset to obtain temperature and strain information, it can achieve real-time high-precision rapid measurement and display, and promptly reflect the temperature and strain changes of the measured surface area, providing an accurate basis for real-time control of the equipment. The modular temperature and strain measurement element includes multiple functional layers, such as a protective layer, a buffer layer, and a heat insulation layer. The buffer layer can reduce the damage of external impact to the sensor, and the heat insulation layer can isolate external temperature interference. The materials and structures of each layer can be flexibly adjusted for different working conditions, enhancing the adaptability of the device to complex environments. The measurement element has docking interfaces between each layer, and the structure can be customized according to the device being tested, which facilitates quick deployment and disassembly. When the fiber optic sensor is damaged, it is not necessary to replace the whole unit; only the corresponding module needs to be replaced, reducing maintenance costs and time. Attached Figure Description

[0014] To more clearly illustrate the technical solutions in the embodiments of this utility model or the prior art, the drawings used in the description of the embodiments or the prior art will be briefly introduced below. Obviously, the drawings described below are only embodiments of this utility model. For those skilled in the art, other drawings can be obtained based on the provided drawings without creative effort.

[0015] Figure 1 This is a structural schematic diagram of the present invention;

[0016] Figure 2 A schematic diagram of the isolation and protective layer provided by this utility model. Detailed Implementation

[0017] The technical solutions of the present utility model will be clearly and completely described below with reference to the accompanying drawings of the embodiments. Obviously, the described embodiments are only some embodiments of the present utility model, and not all embodiments. Based on the embodiments of the present utility model, all other embodiments obtained by those of ordinary skill in the art without creative effort are within the protection scope of the present utility model.

[0018] This utility model discloses a modular full-space and full-time temperature and strain measurement device, such as... Figure 1 As shown, it includes: a modular temperature and strain measuring device, a signal generating device, a signal receiving device, and a visualization device. The modular temperature and strain measuring device is disposed on the surface or inside the object being tested and is used to measure the temperature and strain values ​​of the object being tested. It includes an insulating protective layer to protect the internal sensor. The signal generating device emits an optical signal, which is transmitted to the modular temperature and strain measuring device via a transmission line. The optical signal is deflected during transmission under the influence of the object being tested. The signal receiving device receives the deflected optical signal and sends it to the visualization device for processing and display.

[0019] The optical signal that has shifted or changed is returned to the signal receiving device for real-time processing via a transmission line. By detecting the shift in the signal, the surface temperature and strain distribution of the object under test can be obtained. The temperature measurement range covers -197℃ to 1800℃, the strain measurement range is ±1500με, and the acceleration measurement range is 0.5-120Hz.

[0020] In one specific embodiment, such as Figure 2As shown, the isolation and protective layer comprises a protective layer, a support layer, a buffer layer, a heat insulation / heat conduction layer, a sensor arrangement layer, and a sensor fixing device, arranged sequentially from the outside to the inside. Each layer is connected via an interface. The sensor arrangement layer includes temperature sensors and strain sensors, or one or a combination of the above. When the device being tested or its location is in an area with frequent vibration, the sensor fixing device layer in the structure needs to be replaced with a material capable of withstanding frequent or periodic vibrations to prevent signal distortion caused by poor contact between the sensor and the tested area.

[0021] In one specific embodiment, the support layer is any of a metallic material, a non-metallic material, or a composite material, and structurally it is preferably selected as a plate-like or mesh-like form or other support type with high strength.

[0022] In one specific embodiment, the buffer layer is made of an elastic or non-elastic material. The main function of the buffer layer is to reduce the damage to the temperature and strain sensors caused by external impacts on the support layer. The elastic material is made of rubber or springs, and the non-elastic material is made of foam or aerogel, but it cannot be corrosive. At the same time, the stable operating temperature must be higher than the surface being detected.

[0023] In one specific embodiment, the insulation layer isolates the external temperature from the temperature sensor's detection process, providing insulation against both high and low external temperatures. Suitable materials include, but are not limited to, high- or low-temperature resistant coatings, refractory fiber cloth, ceramic fibers, rock wool, glass wool, and aerogel materials. The specific type, thickness, and area used are adjusted according to the actual operating temperature. The heat conduction layer serves as a transition layer between the surface of the object being tested and the temperature and strain sensors when the surface is uneven. This layer is made of highly thermally conductive material and can be selected from materials with good thermal conductivity and plasticity, such as thin metal sheets, metal powder coatings, and others. However, it must not be corrosive, and its stable operating temperature must be higher than that of the surface being tested. When the temperature of the device being tested is in a low or extremely low temperature range, a separate insulation layer is required in the structure to prevent external air or heat sources from interfering with the temperature and strain measurement sensors. Simultaneously, the contact fixing layer in the module that is in contact with the detection area needs to be replaced with a material suitable for low-temperature operating conditions. When the temperature of the device being tested is in the high-temperature range, the insulation layer in the structure needs to be replaced with a thermally conductive layer with good thermal conductivity to prevent the heat in the tested area from not being effectively conducted away, which would interfere with the temperature and strain measurement sensors. At the same time, the contact fixing layer in the module that is in contact with the tested area also needs to be replaced with a material that can work under high-temperature conditions.

[0024] In one specific embodiment, the temperature sensor includes, but is not limited to, optical, thermocouple, and other measurement sensors that can be converted into temperature signals. The strain sensor adopts FBG strain temperature compensation and acceleration sensor, with a temperature measurement range of -197℃ to 1800℃, a strain measurement range of ±1500με, and an acceleration measurement range of 0.5-120Hz. Different temperature measurement structures and temperature measurement modules are used depending on the detection location.

[0025] In one specific embodiment, the optical temperature sensor uses optical fibers made of different materials, such as ordinary quartz fiber, fluoride fiber, sapphire fiber, etc., and can be either distributed fiber optic temperature measurement (DTS) or fiber optic grating temperature measurement (FBG). DTS is used when the measurement area is large and the requirements for accuracy and speed are not high, while FBG is used when the measurement area is small and the requirements for accuracy and speed are high. The arrangement of the fiber optic temperature sensor and fiber optic strain sensor on the arrangement layer can adopt various forms such as spiral, ring, S-shape, straight line, and latitude-longitude arrangement, depending on the detection needs, but it must cover the area to be detected.

[0026] Core formula for distributed fiber optic sensing measurement:

[0027]

[0028] Among them, I AS I represents the intensity of the anti-Stokes light in stimulated Raman scattering. S λ is the intensity of Stokes light. S λ is the wavelength of Stokes light. AS Let λ be the wavelength of the anti-Stokes light, and h be Planck's constant, h = 6.626 × 10⁻⁶. -34 J·s, c is the speed of light in vacuum, Δν is the Raman shift, reflecting the characteristic frequency difference of molecular vibrational energy levels, k B K is the Boltzmann constant. B =1.38×10 -23 J / K, T is absolute temperature, and the unit is Kelvin.

[0029] Core formula for fiber optic grating sensor measurement:

[0030] Δλ B =λ B ·(α+ξ)·ΔT;

[0031] Where, Δλ B λ is the center wavelength shift of the fiber grating. B λ is the initial center wavelength of the fiber grating, α is the thermal expansion coefficient of the fiber material, ξ is the thermo-optic coefficient of the fiber material, and ΔT is the temperature change.

[0032] When the working area of ​​the device being tested is susceptible to external interference, impact, or damage, the supporting layer in the structure needs to be replaced with a high-strength material capable of resisting external impacts. Simultaneously, the internal buffer layer must be able to promptly disperse external impact loads, preventing them from drying out or even damaging the internal strain sensor. Furthermore, the contact fixing layer with the detection area should also be replaced with a material suitable for the aforementioned working conditions to prevent signal distortion caused by poor contact between the sensor and the detected area.

[0033] The following section will provide a detailed explanation of the system using specific application examples.

[0034] Example 1:

[0035] This measurement module and system were used to inspect cryogenic liquid storage tanks. The measurement module consists of, from the outside in, a buffer layer, an insulation layer (aerogel was used in this case), a temperature and strain sensor arrangement layer, and a contact fixing layer for the measured area (using magnetic adsorption material to ensure tight contact with the measured area without any gaps). The entire measurement module is arranged inside the insulation layer of the storage tank and is isolated from the outside environment by the insulation layer of the storage tank, ensuring that the temperature and strain of the measured area are the true temperature inside the tank. The lowest measured temperature is -197℃, and the optical fiber made of fluoride material is used as the sensor.

[0036] Example 2:

[0037] This measurement module and system are used to detect temperature and strain in a cement rotary kiln. The measurement module consists of a support layer, a buffer layer (made of a material with good thermal conductivity), a heat conduction layer (a thin metal sheet), a temperature and strain sensor arrangement layer (using a metal mesh as the arrangement layer), and a tightening device, from the outside in. The entire measurement module is tightly fitted to the surface of the cement rotary kiln. Through temperature and strain sensors, the actual temperature and strain in the circumferential and length directions of the kiln body are detected in real time. The maximum detection temperature is usually set to 900℃. The temperature and strain sensors are made of siliceous optical fibers. By detecting changes in temperature, strain, and vibration, the temperature distribution along the length and radial direction of the rotary kiln, the thickness of the rings, and the material movement can be obtained.

[0038] Example 3:

[0039] This measurement module and system are used to perform full-range temperature and strain monitoring on chemical reaction towers or blast furnaces. The measurement module consists of a support layer, a buffer layer, a heat conduction layer (metal sheet), a temperature and strain sensor arrangement layer (using metal mesh as the arrangement layer), and a tightening device, from the outside in. The entire measurement module is tightly fitted onto the surface between the furnace lining and the cooling wall inside the reaction tower or blast furnace. Through temperature and strain sensors, the actual temperature and strain in the circumferential and height directions of the reaction tower or blast furnace are detected in real time. The maximum detection temperature is usually set to 900℃. Fiber optics made of silicon material are used as temperature and strain sensors. By detecting changes in temperature, strain, and vibration, the system can determine the temperature distribution in the height and radial direction of the reaction tower or blast furnace, the liquid flow inside the tower or furnace, and whether there are problems such as adhesion to the inner wall of the tower, providing a basis for judging the stable operation of the reaction tower or blast furnace.

[0040] Example 4:

[0041] This measurement module and system are used to monitor the working status of a bucket reclaimer used in ports. The measurement module consists of a support layer, a buffer layer, a temperature and strain sensor arrangement layer (using a metal mesh as the arrangement layer), and a sensor fixing device, from the outside to the inside. The entire measurement module is closely fitted to the surface of the reclaimer that experiences significant stress and vibration. Through temperature and strain sensors, the actual temperature and strain of the measured area are detected in real time. The maximum temperature value is usually set to 150℃. Fiber optic cables made of silicon material are used as temperature and strain sensors. By detecting changes in temperature, strain, and vibration, the vibration and strain distribution of key parts of the reclaimer can be obtained, providing a basis for judging the stable operation of the reclaimer.

[0042] This invention achieves the protection of the fiber optic sensor through the setting of an isolation protective layer, and realizes the integration of the sensor through a modular temperature and strain measurement device.

[0043] The various embodiments in this specification are described in a progressive manner, with each embodiment focusing on its differences from other embodiments. Similar or identical parts between embodiments can be referred to interchangeably. For the apparatus disclosed in the embodiments, since it corresponds to the method disclosed in the embodiments, the description is relatively simple; relevant parts can be referred to in the method section.

[0044] The above description of the disclosed embodiments enables those skilled in the art to make or use the present invention. Various modifications to these embodiments will be readily apparent to those skilled in the art, and the general principles defined herein may be implemented in other embodiments without departing from the spirit or scope of the present invention. Therefore, the present invention is not to be limited to the embodiments shown herein, but is to be accorded the widest scope consistent with the principles and novel features disclosed herein.

Claims

1. A modular all-space and all-time temperature and strain measurement device, characterized in that, include: The device comprises a modular temperature and strain measuring device, a signal generating device, a signal receiving device, and a visualization device. The modular temperature and strain measuring device is used to measure the temperature and strain of a tested object and includes an insulating protective layer for protecting the internal sensor. The signal generating device emits an optical signal which is transmitted to the modular temperature and strain measuring device via a transmission line. The optical signal is deflected during transmission under the influence of the temperature and strain of the tested object. The signal receiving device receives the offset optical signal and sends it to the visualization device.

2. The modular full-space and full-time temperature and strain measurement device according to claim 1, characterized in that, The isolation and protection layer includes a protective layer, a support layer, a buffer layer, a heat insulation / heat conduction layer, a sensor arrangement layer, and a sensor fixing device arranged sequentially from the outside to the inside. The layers are connected through interfaces. The sensor arrangement layer includes a temperature sensor and a strain sensor.

3. The modular full-space and full-time temperature and strain measurement device according to claim 2, characterized in that, The support layer is made of any one of metallic, non-metallic, or composite materials, and is structurally plate-shaped or mesh-shaped.

4. The modular full-space and full-time temperature and strain measurement device according to claim 2, characterized in that, The buffer layer is made of an elastic material or a non-elastic material, wherein the elastic material is rubber or a spring, and the non-elastic material is foam or aerogel.

5. A modular full-space and full-time temperature and strain measurement device according to claim 2, characterized in that, The insulation layer isolates the external temperature from the temperature sensor detection process, and the heat conduction layer serves as a transition layer between the surface of the object being tested and the temperature and strain sensors when the surface of the object being tested is uneven.

6. The modular full-space and full-time temperature and strain measurement device according to claim 2, characterized in that, The temperature sensor includes optical and thermocouple types. The strain sensor adopts FBG strain temperature compensation and acceleration sensor. The temperature measurement range covers -197℃ to 1800℃, the strain measurement range is ±1500με, and the acceleration measurement range is 0.5-120Hz.

7. A modular full-space and full-time temperature and strain measurement device according to claim 6, characterized in that, Optical temperature sensors use optical fibers made of different materials for distributed optical fiber temperature measurement or fiber optic grating temperature measurement; the arrangement of temperature sensors and strain sensors on the arrangement layer can be any of the following forms: spiral, ring, S-shaped, straight, or latitude and longitude, depending on the detection requirements.

Images