A high-temperature material temperature measuring device and method

Abstract

The application discloses a high-temperature material temperature measuring device and method, and belongs to the technical field of industrial temperature measurement. The measuring device comprises an outer tube, an inner tube, an infrared sensor and a reflector. The outer tube is used for being inserted into and contacting a measured material. The inner tube is coaxially arranged in the outer tube and does not contact the outer tube. At least one light-transmitting part extending along the axial direction of the inner tube is arranged on the tube wall of the inner tube. One end of the inner tube is an open end, and the infrared sensor is located at the open end of the inner tube. The reflector is located in the inner tube and is used for receiving infrared radiation of the inner wall of the outer tube through the light-transmitting part and reflecting the infrared radiation to the infrared sensor. The application solves the problem of how to long-term and reliably measure the temperature distribution of a material under the premise of not greatly damaging the structure of equipment in a high-temperature and harsh industrial environment.

Description

Technical Field

[0001] This invention relates to the field of industrial temperature measurement technology, and more specifically, to a device and method for measuring the temperature of high-temperature materials. Background Technology

[0002] In industries such as metallurgy, building materials, and chemicals, it is often necessary to monitor the temperature of high-temperature materials (such as molten metal, sintered ore, high-temperature molten salt, high-temperature covering materials, and crusts) inside equipment such as kilns and reactors. Currently, the mainstream industrial methods for measuring the temperature of high-temperature materials are mainly divided into two categories: contact temperature measurement and non-contact temperature measurement. However, both methods have significant shortcomings when applied to measuring the temperature inside high-temperature materials, making it difficult to meet actual production needs.

[0003] Contact temperature measurement, represented by insertion thermocouples, works by directly contacting the sensing element with the material being measured, utilizing the thermoelectric effect to achieve temperature measurement. While this method offers relatively high accuracy, it also has significant drawbacks: First, its durability is extremely poor. The thermocouple sensing element is directly exposed to high-temperature, corrosive, or abrasive material environments, making it highly susceptible to ablation, corrosion, nodulation, or mechanical damage, resulting in a short lifespan, frequent replacements, and high maintenance costs. Second, it suffers from single-point measurement limitations; a single thermocouple can only measure the temperature at its installation point. To obtain the temperature distribution at different depths within the material, multiple thermocouples need to be pre-installed, increasing measurement costs and installation difficulty, and potentially damaging the structural integrity of the equipment and material. Third, its response speed is slow, and replacing thermocouples requires production interruption, affecting production continuity.

[0004] Non-contact temperature measurement, represented by infrared thermometers and thermal imagers, works by receiving infrared radiation signals from the surface of the object being measured and converting them into temperature values ​​using the laws of infrared radiation. The advantages of this method are that it does not require contact with the material being measured and has a fast response time. However, when applied to measuring the temperature inside high-temperature materials, it has inherent drawbacks that are difficult to overcome: First, an observation window needs to be opened on the equipment casing for the transmission of infrared radiation, which severely compromises the equipment's sealing and structural strength, making it completely unsuitable for high-pressure, toxic, or enclosed high-temperature environments. Second, core components are easily damaged. The core electronic components of infrared sensors are extremely sensitive to temperature. Even with water cooling protection, long-term exposure to high-temperature radiation and dust interference can still lead to decreased reliability, high failure rates, and high maintenance costs. Third, the measurement range is limited. Traditional non-contact temperature measurement can only measure the temperature of the material's surface or the area directly opposite the observation window, and cannot measure the temperature in the depth direction inside the material, making it difficult to obtain temperature distribution information.

[0005] In summary, existing technologies struggle to achieve long-term, reliable temperature measurement that captures internal temperature distribution while minimizing damage to the equipment structure in high-temperature, harsh industrial environments. Therefore, this invention provides a high-temperature material temperature measurement device and method to address these issues. Summary of the Invention

[0006] The purpose of this invention is to provide a high-temperature material temperature measurement device and method, which solves the problem of how to reliably measure the temperature distribution of materials in a high-temperature and harsh industrial environment without significantly damaging the equipment structure.

[0007] To achieve the above objectives, the present invention provides the following technical solution: In a first aspect, the present invention provides a high-temperature material temperature measuring device, comprising: The outer tube is used to insert into and contact the material being tested; An inner tube is coaxially disposed inside the outer tube and the two do not contact each other. The inner tube has at least one light-transmitting part extending along its axial direction on its tube wall. An infrared sensor is provided, wherein one end of the inner tube is an open end, and the infrared sensor is located at the open end of the inner tube. A reflector, located inside the inner tube, is used to receive infrared radiation from the inner wall of the outer tube through the light-transmitting part and reflect the infrared radiation to the infrared sensor.

[0008] A further preferred embodiment includes an adjustment mechanism for moving the reflector along the axial direction of the inner tube.

[0009] A further preferred embodiment is that the outer tube is made of a high thermal conductivity material with a thermal diffusivity greater than 5 × 10⁻⁶. -5 m² / s.

[0010] A further preferred embodiment is that the high thermal conductivity material is at least one of metal and ceramic.

[0011] A further preferred embodiment is that the light-transmitting portion of the inner tube is a transparent window or slit extending along its axial direction.

[0012] A further preferred embodiment is that the outer wall of the inner tube is covered with a high-reflectivity layer.

[0013] A further preferred embodiment includes a cooling pipe disposed inside the inner tube for cooling the reflector and / or the inner tube.

[0014] Secondly, the present invention also provides a method for measuring the temperature of high-temperature materials, comprising the following steps: S1. Insert the outer tube into the material to be tested, so that its outer wall contacts the material to be tested; S2. Receive the infrared radiation signal from the inner wall of the outer tube at the target location using the infrared sensor; S3: Convert the infrared radiation signal into a temperature measurement value.

[0015] Further preferably, before step S3, the angle and / or axial position of the reflector is adjusted.

[0016] A further preferred embodiment includes step S4: correcting the temperature measurement value obtained in step S3 according to a predetermined compensation correction relationship to obtain the actual internal temperature of the material being measured.

[0017] In summary, the present invention has the following beneficial effects: 1. High reliability and long lifespan: By placing the expensive and fragile infrared sensor in the external low-temperature safe zone, and placing only the high-temperature resistant and low-cost outer tube and mechanical reflector in the high-temperature zone inside the material, the problem of easy damage to the core temperature sensing element is fundamentally solved. 2. Internal multi-point temperature measurement: By simply moving the reflector axially, temperature information at different depths inside the material (corresponding to different axial positions of the reflector) can be continuously and quickly obtained, realizing "one hole, multiple points", which is low in cost and easy to operate; 3. Minimal damage to materials: Only a small hole needs to be made in the area of ​​the material being tested for the insertion of the outer tube. The hole is small in diameter and supported by the outer tube, so the impact on the structural strength and sealing of the material is far less than that of making a large observation window. 4. More comprehensive measurement information: Temperature distribution curves along the insertion direction can be obtained, providing more comprehensive data support for process optimization; 5. Wider applicability: It is especially suitable for temperature measurement inside high-temperature sealed containers with dust, smoke or corrosive atmosphere, because the optical path is sealed in a clean cavity composed of inner and outer tubes and is not affected by harsh external environment.

[0018] This invention constructs a composite temperature measurement system combining "contact heat conduction + non-contact optical observation." The principle is as follows: an outer tube is inserted into a high-temperature material, and its outer wall temperature rapidly converges with the temperature of the material at the contact point. Heat is conducted through the tube wall, making its inner wall a stable "secondary radiation source." By axially moving a reflector in the inner tube, different axial positions of the outer tube's inner wall can be observed. The reflector reflects infrared radiation from the inner wall at specific locations to an infrared sensor behind it, thus achieving indirect, non-contact measurement of the material temperature at the contact point on the outer tube's outer wall. Because the infrared sensor is located far from the high-temperature zone at the rear, it is fundamentally protected. Therefore, this invention enables stable and reliable measurement of temperatures at different locations within high-temperature materials, while protecting precision temperature sensing elements, extending the overall service life of the device, and solving the problem of how to reliably measure the temperature distribution at different depths within materials in harsh, high-temperature industrial environments without significantly damaging the equipment structure. Attached Figure Description

[0019] Figure 1 This is a cross-sectional structural schematic diagram of a high-temperature material temperature measuring device in a preferred embodiment of the present invention; Figure 2 This is a schematic diagram of the overall structure of the high-temperature material temperature measuring device in a preferred embodiment of the present invention; Figure 3 This is a schematic diagram of the inner and outer tube structures of the high-temperature material temperature measuring device in a preferred embodiment of the present invention; Figure 4 This is a flowchart of a high-temperature material temperature measurement method in a preferred embodiment of the present invention.

[0020] In the diagram, 1 is the outer tube; 2 is the inner tube; 3 is the adjusting mechanism; 31 is the mechanical support; 321 is the nut; 322 is the lead screw; 4 is the reflector; 5 is the infrared sensor; 6 is the high reflectivity layer; 7 is the cooling pipe; 8 is the material being measured; and 9 is the light-transmitting part. Detailed Implementation

[0021] The present invention will be further described in detail below with reference to the accompanying drawings and specific embodiments.

[0022] Example: A temperature measuring device and method for high-temperature materials, such as... Figure 1-3As shown, the high-temperature material temperature measuring device includes an outer tube 1, an inner tube 2, an infrared sensor 5, and a reflector 4. The outer tube 1 is inserted into and contacts the material being measured 8 (such as a sintered ore bed) to achieve temperature conduction. It has a closed end and an open end. The closed end is inserted into the material being measured 8, effectively preventing material from entering the gap between the outer tube 1 and the inner tube 2. The open end is located outside the material being measured 8, facilitating the overall installation and subsequent maintenance of the device. The inner tube 2 is coaxially disposed inside the outer tube 1, and the two do not contact each other, preventing direct heat conduction to the inner tube 2 and affecting the operational stability of the core components. The inner tube 2 has at least one light-transmitting portion 9 extending axially on its wall, providing a channel for the transmission of infrared radiation. The infrared sensor 5 is located at the open end of the inner tube 2, in a safe position away from high-temperature areas, effectively preventing high-temperature damage. The reflector 4 is located inside the inner tube 2, used to receive infrared radiation emitted from the inner wall of the outer tube 1 through the light-transmitting portion 9 of the inner tube 2, and reflect this infrared radiation to the infrared sensor 5, realizing the transmission of infrared signals. At least a portion of the outer tube 1 is used to insert into and contact the material being tested 8, ensuring that the outer tube 1 and the material being tested 8 can exchange heat sufficiently, so that the temperature of the inner wall of the outer tube 1 and the temperature at the contact point of the material being tested 8 tend to be consistent, providing an accurate basis for subsequent temperature measurement.

[0023] In the above technical solution, during measurement, most of the length of the outer tube 1 is vertically inserted into the sintered ore bed 8, with the open end exposed to the outside air. A section of the outer tube 1 is in full contact with the material being measured 8, ensuring that the two quickly reach thermal equilibrium. This allows the temperature of the inner wall of the outer tube 1 to accurately reflect the temperature at the contact point of the material being measured 8. This design effectively solves the core defects of slow response and inaccurate temperature conduction in contact temperature measurement, as well as the inability of non-contact temperature measurement to reflect the true internal temperature of the material, laying the foundation for subsequent accurate temperature measurement. The inner tube 2 is coaxially located inside the outer tube 1 and does not contact the outer tube 1, which avoids heat being directly conducted to the inner tube 2 and damaging the core components. The light-transmitting part 9 extending axially along its tube wall provides a transmission channel for infrared radiation. Together with the reflector 4 inside the inner tube 2 and the infrared sensor 5 at the opening end of the inner tube 2, a composite structure of "heat conduction of the outer tube 1 + optical transmission of the inner tube 2" is formed. This solves the problem that non-contact temperature measurement requires a large observation window, which compromises the sealing and structural strength of the equipment. At the same time, placing the infrared sensor 5 outside the inner tube 2 avoids the disadvantages of decreased reliability and easy damage due to long-term exposure to high temperature and dust environment. Compared with the defects of direct exposure of the temperature sensing element in contact temperature measurement, which is prone to ablation and corrosion, this significantly improves the service life and measurement stability of the device. Furthermore, the outer tube 1 only requires a single-hole insertion for temperature measurement. The small aperture, supported by the outer tube 1, eliminates the need for pre-embedded multiple temperature sensing elements or observation windows, effectively solving the problems of significant damage to equipment and material structures and complex installation associated with traditional temperature measurement methods. Simultaneously, the cooperation between the reflector 4 and the light-transmitting part 9 provides structural support for subsequent multi-point temperature measurement within the material, overcoming the limitations of existing temperature measurement methods that either require single-point measurement or cannot measure the internal temperature of materials. The overall structural design balances measurement accuracy, equipment safety, and ease of operation, making it suitable for measuring the internal temperature of materials under high-temperature and harsh conditions. Therefore, this invention achieves non-contact, stable measurement of temperatures at different locations within high-temperature materials, offering advantages such as reliable measurement, minimal damage to equipment structure, and the ability to obtain axial temperature distribution information.

[0024] In a preferred embodiment of the present invention, both the outer tube 1 and the inner tube 2 have a closed end and an open end. The open end of the inner tube 2 corresponds to the open end of the outer tube 1, and the closed end of the inner tube 2 corresponds to the closed end of the outer tube 1. The inner tube 2 can be axially mounted inside the outer tube 1 via an external suspension device, support device, or other fixing device.

[0025] As a preferred embodiment of the present invention, the inner tube 2 may be provided with a plurality of light-transmitting parts 9 arranged along its axial direction on its tube wall. The arrangement of the plurality of light-transmitting parts 9 provides a continuous observation window for the reflector 4 during axial movement, so as to achieve stable and reliable measurement of the temperature at different locations inside the high-temperature material.

[0026] Accordingly, the measuring device also includes an adjustment mechanism 3, which is used to move the reflector 4 along the axial direction of the inner tube 2 to align it with different positions to be measured. The core function of the adjustment mechanism 3 is to achieve continuous or stepwise displacement and precise positioning of the reflector 4 along the axial direction of the inner tube 2.

[0027] It should be understood that the specific implementation of the adjustment mechanism 3 is not unique. Various driving methods that can achieve the above-mentioned linear motion and positioning functions can be applied, such as, but not limited to, cylinder or hydraulic cylinder drive, gear and rack transmission, direct linear motor drive, or manual precision push rod mechanism with scale and locking functions.

[0028] In this embodiment, the adjustment mechanism 3 is implemented using a high-precision linear drive assembly. (Refer to...) Figures 1 to 3 The component mainly includes a stepper motor, a precision lead screw and nut pair, and a mechanical support 31. The mechanical support 31 is fixedly installed on the outside of the open end of the inner tube 2 or on an extension structure connected to it. The body of the stepper motor is fixed on the mechanical support 31, and its output shaft is driven by the lead screw 322. The lead screw 322 is fitted with a nut 321 that has a threaded fit with it. The nut 321 constitutes the moving end of the adjusting mechanism 3. The nut 321 slides with the inner tube 2 or the mechanical support 31, and the reflector 4 is mounted on the moving end through a mounting base.

[0029] Its working principle is as follows: When the stepper motor starts, it drives the lead screw 322 to rotate, which in turn converts into precise linear displacement of the nut 321 along the axis of the lead screw 322. This axis is parallel to the axis of the inner tube 2, thereby achieving precise positioning of the reflector 4 in the axial direction of the inner tube 2.

[0030] like Figure 1-3 As shown, in a preferred embodiment of the present invention, the reflector 4 has an adjustable angle, which is achieved through a universal adjustment base. This universal adjustment base is rigidly connected to the moving end (nut 321) of the adjustment mechanism 3 via a connecting rod, and the reflector 4 is mounted on this universal adjustment base. Specifically, the universal adjustment base has at least two orthogonal rotation axes and is equipped with corresponding locking components (such as locking screws). By manually or through a micro-drive device (such as a micro servo motor), the pitch and yaw angles of the reflector 4 can be independently and precisely adjusted, thereby ensuring that its optical axis is accurately aligned with the light-transmitting portion 9 of the inner tube 2 and the target measurement area on the inner wall of the outer tube 1. After the angle adjustment is completed, the attitude of the reflector 4 can be fixed by the locking components. The universal adjustment base is prior art, therefore its specific structure and working principle will not be described in detail here.

[0031] Furthermore, the fixed end (mechanical support 31) of the adjustment mechanism 3 extends into the interior of the inner tube 2 through the open end of the inner tube 2. The infrared sensor 5 (e.g., a thermopile detector) is mounted on the fixed end and located outside the open end of the inner tube 2, thereby avoiding damage to the infrared sensor 5 from harsh environments such as high temperature and / or corrosion. The optical axis of the infrared sensor 5 is pre-calibrated and precisely aligned with the reflected light path of the reflector 4 after the aforementioned angle adjustment, to ensure efficient reception of the infrared radiation signal.

[0032] As a preferred embodiment of the present invention, the outer tube 1 is made of a high thermal conductivity material with a thermal diffusivity greater than 5 × 10⁻⁶. -5 m² / s, meeting the requirements for high thermal conductivity and high temperature resistance.

[0033] Furthermore, the high thermal conductivity material is at least one of metal and ceramic. The melting point of the outer tube 1 should be higher than the highest temperature of the material being tested 8 to prevent the outer tube 1 from melting or deforming in a high-temperature environment and to improve the high-temperature resistance of the device. For example, when the highest temperature of the material being tested 8 is 800°C, the outer tube 1 can be made of copper; when the material being tested 8 is corrosive, the outer tube 1 can be a copper tube with a ceramic-coated outer wall. In this embodiment, the outer tube 1 is made of high-temperature resistant stainless steel.

[0034] In a preferred embodiment of the present invention, the inner tube 2 is made of quartz glass, and its outer diameter is slightly smaller than that of the inner diameter of the outer tube 1. The two are coaxially mounted and maintain a certain annular gap. The outer wall of the inner tube 2 does not contact the inner wall of the outer tube 1 to avoid contact friction. The light-transmitting part 9 of the inner tube 2 is a transparent window or slit extending along its axial direction. The function of the light-transmitting part 9 is to allow infrared radiation emitted from the inner wall of the outer tube 1 to pass through the inner tube 2 and be reflected by the reflector 4 to the external infrared sensor 5. The outer wall of the inner tube 2 is provided with a high-reflectivity layer 6, which is disposed away from the light-transmitting part 9.

[0035] Furthermore, the inner tube 2 is a quartz glass tube, and its outer wall is provided with a layer of metal foil (such as aluminum foil) to reflect the heat rays emitted by the outer tube 1 as much as possible, thereby reducing the impact of the high-temperature environment on the inner tube 2. An axially oriented slit is opened on the inner tube 2 wall as a light-transmitting part 9, and a narrow slit is reserved in the metal foil layer as a light-transmitting part 9, so that heat rays emitted from different positions on the inner wall of the outer tube 1 can penetrate the inner tube 2.

[0036] like Figure 1As shown, to further improve measurement stability and lens cleanliness in extremely high temperature environments (e.g., >1200℃), in another specific embodiment, the measuring device also includes a cooling pipe 7. The cooling pipe 7 is located inside the inner tube 2 and is used to cool the reflector 4 and / or the inner tube 2. The cooling pipe 7 is connected to the outlet of the blower and has multiple air outlets arranged on its wall to form an air outlet array, which is used to deliver air or nitrogen into the inner tube 2, thereby achieving cooling of the reflector 4 and / or the inner tube 2. The specific arrangement of the cooling pipe 7 can be as follows: it is laid inside the inner tube 2, and the air outlet of the cooling pipe 7 is directed towards the back and side areas of the reflector 4. During operation, dry compressed air or inert gas is introduced into the cooling pipe 7. This airflow can continuously cool and purge the reflector 4 and its universal adjustment base, thereby effectively preventing the reflector 4 from thermal deformation due to high temperature and avoiding the accumulation of contaminants on its surface, ensuring the long-term stability of optical reflection efficiency. At the same time, the cooling airflow also has a certain purifying and auxiliary cooling effect on the internal cavity of the inner tube 2.

[0037] Working Process and Principle: After the outer tube 1 and the material being measured 8 reach thermal equilibrium, the temperature at each point on its inner wall is a mapping of the temperature at the corresponding point on the outer wall. The control system sends a command to the stepper motor, driving the nut 321 to move the reflector 4 to the target measurement depth (e.g., corresponding to the bottom, middle, and top of the material bed). The reflector 4 receives the infrared radiation emitted by the inner wall of the outer tube 1 at that depth through the light-transmitting part 9 of the inner tube 2, and reflects it back to the infrared sensor 5. The infrared sensor 5 converts the light signal into an electrical signal, which is then processed by the circuit and displayed after looking up a table. By controlling the stepper motor through a program, the reflector 4 can be automatically and continuously positioned to a series of preset positions, thereby quickly obtaining an axial temperature distribution curve.

[0038] A method for measuring the temperature of high-temperature materials, implemented using the aforementioned measuring device, such as... Figure 1-3 As shown, it includes the following steps: S1. Insert the outer tube 1 into the material to be tested 8, so that its closed end and the outer wall of the tube body of a predetermined length come into contact with the material to be tested 8; wait for a sufficient time so that the temperature of the outer wall of the outer tube 1 and the temperature of the material at the contact point reach a dynamic equilibrium. S2. Receive the infrared radiation signal from the inner wall of the outer tube 1 at the target location through the infrared sensor 5, that is, activate the infrared sensor 5 to receive the infrared radiation signal from a specific location on the inner wall of the outer tube 1 reflected by the reflector 4. S3: Converts infrared radiation signals into temperature measurements; Infrared sensor 5 converts light signals into electrical signals, and the built-in or external signal processing circuit (including amplifier, A / D converter and calculation unit) calculates and displays the initial temperature value corresponding to the measurement point according to the principle of radiation thermometry.

[0039] As a preferred embodiment of the present invention, before step S2, the angle and axial position of the reflector 4 can be adjusted, i.e., optical alignment and axial positioning. Optical alignment: Adjust the angle of the reflector 4 in the inner tube 2 to a preset angle so that it can clearly "aim" at the area to be measured on the inner wall of the outer tube 1 through the light-transmitting part 9 of the inner tube 2, and effectively reflect the radiation from that area to the receiving surface of the infrared sensor 5. Axial positioning: According to the depth position of the material to be measured, move the adjusting mechanism 3 along the axial direction to precisely position the reflector 4 to the corresponding axial coordinate, i.e., to the preset axial position corresponding to the internal position of the material to be measured.

[0040] As a preferred embodiment of the present invention, temperature compensation correction can be performed after step S3. That is, the temperature measurement value obtained in step S3 is corrected according to a predetermined compensation correction relationship to obtain the actual internal temperature of the measured material 8. Specifically, based on the material thermophysical parameters (such as thermal conductivity and thermal diffusivity) and geometric dimensions (such as wall thickness and diameter) of the outer tube 1 and the inner tube 2, the axial position of the reflector 4, and the correction model established in advance through calibration experiments, the initial temperature value obtained in step S3 is systematically compensated and corrected for errors, and finally a calculated value that is closer to the true internal temperature of the measured material 8 is output.

[0041] Specifically, due to thermal resistance and axial thermal diffusion during the heat conduction from the outer wall of the outer tube 1 to the inner wall, and the energy attenuation of infrared radiation when it passes through the light-transmitting part 9 of the inner tube 2 and is reflected by the reflector 4, there is an inherent systematic deviation between the temperature measurement value directly output by the infrared sensor 5 and the actual internal temperature of the material.

[0042] To compensate for this deviation, a correction relationship for the device needs to be established through system calibration tests before measurement. This involves conducting numerous calibration experiments before measurement to establish and preset the compensation correction relationship for the device's temperature measurements. In one specific embodiment, the calibration method is as follows: The entire device is placed in a standard heat source (such as a high-precision temperature field furnace) with a known and uniformly distributed temperature. Different material temperatures (heat source set temperature) and different insertion depths (simulated by axially moving reflector 4) are simulated, and the original measured values ​​output by infrared sensor 5 under each operating condition are recorded. By comparing the known real temperature (standard heat source temperature) with the sensor's original readings, and using a data fitting algorithm (e.g., establishing a correction formula or data lookup table), the systematic error pattern of this specific device can be determined, thereby establishing its dedicated temperature compensation correction model.

[0043] This compensation and correction model can be integrated into the device's local control system or the connected host computer software. During actual measurement, the system automatically calls this model to perform real-time compensation calculations on the raw temperature values ​​acquired by infrared sensor 5, ultimately outputting a corrected result that more closely approximates the material's true internal temperature. The host computer can also be used to implement measurement control, data storage, analysis, and temperature distribution curve plotting functions.

[0044] The above description is merely a preferred embodiment of the present invention. The scope of protection of the present invention is not limited to the above embodiments. All technical solutions falling within the scope of the present invention's concept are within the scope of protection of the present invention. It should be noted that for those skilled in the art, any improvements and modifications made without departing from the principle of the present invention should also be considered within the scope of protection of the present invention.

Claims

1. A temperature measuring device for high-temperature materials, characterized in that: include: The outer tube is used to insert into and contact the material being tested; An inner tube is coaxially disposed inside the outer tube and the two do not contact each other. The inner tube has at least one light-transmitting part extending along its axial direction on its tube wall. An infrared sensor is provided, wherein one end of the inner tube is an open end, and the infrared sensor is located at the open end of the inner tube. A reflector, located inside the inner tube, is used to receive infrared radiation from the inner wall of the outer tube through the light-transmitting part and reflect the infrared radiation to the infrared sensor.

2. The high-temperature material temperature measuring device according to claim 1, characterized in that: It also includes an adjustment mechanism, which is used to move the reflector along the axial direction of the inner tube.

3. The high-temperature material temperature measuring device according to claim 1, characterized in that: The outer tube is made of a high thermal conductivity material with a thermal diffusivity greater than 5 × 10⁻⁶. -5 m² / s.

4. The high-temperature material temperature measuring device according to claim 3, characterized in that: The high thermal conductivity material is at least one of metal and ceramic.

5. The high-temperature material temperature measuring device according to claim 1, characterized in that: The light-transmitting part of the inner tube is a transparent window or slit extending along its axial direction.

6. The high-temperature material temperature measuring device according to claim 1, characterized in that: The outer wall of the inner tube is covered with a highly reflective layer.

7. The high-temperature material temperature measuring device according to claim 1, characterized in that: It also includes a cooling pipe, which is located inside the inner tube and is used to cool the reflector and / or the inner tube.

8. A measurement method using the apparatus as described in any one of claims 1-7, characterized in that: Includes the following steps: S1. Insert the outer tube into the material to be tested, so that its outer wall contacts the material to be tested; S2. Receive the infrared radiation signal from the inner wall of the outer tube at the target location using the infrared sensor; S3: Convert the infrared radiation signal into a temperature measurement value.

9. The method for measuring the temperature of high-temperature materials according to claim 8, characterized in that: Prior to step S3, the angle and / or axial position of the reflector are adjusted.

10. A method for measuring the temperature of high-temperature materials according to claim 9, characterized in that: It also includes step S4: correcting the temperature measurement value obtained in step S3 according to a predetermined compensation correction relationship to obtain the actual internal temperature of the material being measured.

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