Dual channel thermopile temperature sensor calibration device

Abstract

The application discloses a kind of dual-channel thermoelectric couple temperature sensor calibration device, the device includes support assembly, adjusting piece, water temperature disc, microcrystalline panel and heat source;Water temperature disc is fixedly connected with support assembly, adjusting piece is enclosed and set on water temperature disc;Adjusting piece is adjusted in vertical direction relative to water temperature disc height;Microcrystalline panel is set on adjusting piece, adjusting piece, microcrystalline panel and water temperature disc form internal space enclosed;Thermoelectric couple temperature sensor is fixed on the top surface of water temperature disc;Heat source is placed above microcrystalline panel;Water temperature disc is provided with water flow channel in the inside;Water pipe is connected with water flow channel.The above-mentioned calibration device can synchronously and accurately control the distance of heat source and ambient temperature, so as to be compatible with the calibration requirements of different structure dual-channel thermoelectric couple sensors, and improve the calibration efficiency of dual-channel thermoelectric couple temperature sensor.

Description

Technical Field

[0001] This invention relates to the technical field of sensors, and more particularly to a calibration device for a dual-channel thermopile temperature sensor. Background Technology

[0002] Thermopile temperature sensors are widely used in home appliances, especially for temperature monitoring in induction cookers, due to their non-contact temperature measurement characteristics. In recent years, dual-channel thermopile sensors have become the mainstream solution for improving temperature measurement accuracy because they can separate heat source and interference signals through signals of different wavelengths. However, the calibration process of the sensor needs to simulate heat source radiation and ambient temperature interference simultaneously, which traditional single-channel calibration devices cannot meet. The industry generally uses split-type calibration equipment, resulting in low efficiency and high cost. With the development of intelligent induction cookers, higher requirements are placed on the accuracy, efficiency, and compatibility of sensor calibration.

[0003] Existing technologies mainly employ two types of calibration schemes: one is a calibration system combining a constant-temperature water bath with an independent heat source, which simulates the environment by separately controlling the water temperature and the heat source temperature, but suffers from problems such as large equipment size and cumbersome sensor installation; the other is a calibration stage based on a blackbody radiation source, which, while providing a stable heat source, cannot accurately simulate the transmission characteristics of the microcrystalline panel of an induction cooker and is difficult to adapt to sensors with different structures. The former requires frequent sensor disassembly and reassembly, while the latter results in large calibration errors due to the lack of distance adjustment functionality. Therefore, existing calibration devices for dual-channel thermopile temperature sensors suffer from low calibration efficiency. Summary of the Invention

[0004] This invention provides a calibration device for a dual-channel thermopile temperature sensor, which aims to solve the problem of low calibration efficiency in existing calibration devices for dual-channel thermopile temperature sensors.

[0005] The technical solution adopted by this invention to solve its technical problem is: A dual-channel thermopile temperature sensor calibration device, the device comprising a support assembly, an adjustment component, a water temperature pan, a microcrystalline panel, and a heat source; The water temperature plate is fixedly connected to the support assembly, and the adjusting member is arranged around the water temperature plate; the adjusting member is vertically adjustable relative to the water temperature plate. The microcrystalline panel is disposed on the adjusting member, and the adjusting member, the microcrystalline panel, and the water temperature plate enclose an internal space; the thermopile temperature sensor is fixed to the top surface of the water temperature plate; The heat source is positioned above the microcrystalline panel; The water temperature plate has a water flow channel inside; the water supply pipe is connected to the water flow channel.

[0006] The dual-channel thermopile temperature sensor calibration device includes an annular adjusting component with an internal thread on its inner wall and an external thread on the outer side of the water temperature plate that matches the internal thread.

[0007] The dual-channel thermopile temperature sensor calibration device, wherein the diameter of the water flow channel is 3-8 mm.

[0008] The dual-channel thermopile temperature sensor calibration device wherein the thermopile temperature sensor is mounted on a fixing block, and the fixing block is embedded in a fixing hole provided on the top surface of the water temperature plate.

[0009] The dual-channel thermopile temperature sensor calibration device, wherein the microcrystalline panel is a borosilicate glass plate.

[0010] In the dual-channel thermopile temperature sensor calibration device, the surface of the microcrystalline panel is planar, or the surface of the microcrystalline panel has a concave-convex microstructure.

[0011] The dual-channel thermopile temperature sensor calibration device, wherein the heat source is a blackbody, an electric heating pot, or a heated aluminum block.

[0012] The dual-channel thermopile temperature sensor calibration device includes a plurality of grooves on the sidewall of the adjusting member, with the openings of the grooves located on the side of the adjusting member facing the microcrystalline panel.

[0013] The dual-channel thermopile temperature sensor calibration device includes a support assembly comprising a base and at least one support rod; one end of the support rod is fixed to the base, and the other end of the support rod is fixedly connected to the bottom surface of the water temperature pan.

[0014] The dual-channel thermopile temperature sensor calibration device, wherein the support assembly includes at least three support rods, and the plurality of support rods are evenly arranged around the center point of the base.

[0015] This invention provides a calibration device for a dual-channel thermopile temperature sensor. The device includes a support assembly, an adjusting component, a water temperature pan, a microcrystalline panel, and a heat source. The water temperature pan is fixedly connected to the support assembly, and the adjusting component is arranged around the water temperature pan. The adjusting component is vertically adjustable relative to the water temperature pan. The microcrystalline panel is disposed on the adjusting component, and the adjusting component, the microcrystalline panel, and the water temperature pan together form an internal space. The thermopile temperature sensor is fixed to the top surface of the water temperature pan. The heat source is placed above the microcrystalline panel. A water flow channel is provided inside the water temperature pan. A water supply pipe is connected to the water flow channel. This calibration device can simultaneously and accurately control the distance to the heat source and the ambient temperature, thereby being compatible with the calibration requirements of dual-channel thermopile sensors with different structures and improving the calibration efficiency of dual-channel thermopile temperature sensors. Attached Figure Description

[0016] To more clearly illustrate the technical solutions of the embodiments of the present invention, the drawings used in the following description of the embodiments will be briefly introduced. Obviously, the drawings described below are some embodiments of the present invention. For those skilled in the art, other drawings can be obtained based on these drawings without creative effort.

[0017] Figure 1 This is an exploded structural diagram of the calibration device according to an embodiment of this application; Figure 2 This is an overall structural diagram of the calibration device according to an embodiment of this application; Figure 3 This is a partial exploded view of the calibration device according to an embodiment of this application; Figure 4 This is a structural diagram of the dual-channel thermopile temperature sensor in an embodiment of this application.

[0018] Figure label: 10. Support component; 1. Base; 2. Support rod; 3. Water pipe; 4. Adjustment component; 5. Water temperature plate; 6. Sensor; 7. Microcrystalline panel; 8. Heat source; 41. Groove; 61. First detection channel; 62. Second detection channel; 51. Fixing hole. Detailed Implementation

[0019] To make the technical problems, technical solutions and beneficial effects to be solved by this application clearer, the following describes this application in further detail with reference to the accompanying drawings and embodiments.

[0020] It should be understood that the specific embodiments described herein are merely illustrative of this application and are not intended to limit this application.

[0021] It should be noted that when a component is referred to as "fixed to" or "set on" another component, it can be directly on the other component or indirectly on that other component.

[0022] When a component is said to be "connected to" another component, it can be directly connected to the other component or indirectly connected to that other component.

[0023] It should be understood that the terms "length", "width", "upper", "lower", "front", "rear", "left", "right", "vertical", "horizontal", "top", "bottom", "inner", "outer", etc., indicate the orientation or positional relationship based on the orientation or positional relationship shown in the accompanying drawings. They are only for the convenience of describing this application and simplifying the description, and do not indicate or imply that the device or element referred to must have a specific orientation, or be constructed and operated in a specific orientation. Therefore, they should not be construed as limitations on this application.

[0024] Furthermore, the terms "first" and "second" are used for descriptive purposes only and should not be construed as indicating or implying relative importance or implicitly specifying the number of technical features indicated. Thus, a feature defined with "first" or "second" may explicitly or implicitly include one or more of that feature.

[0025] In the description of this application, "multiple" means two or more, unless otherwise expressly and specifically defined.

[0026] To address the problem of low calibration efficiency in existing calibration devices for dual-channel thermopile temperature sensors, this invention provides a dual-channel thermopile temperature sensor calibration device.

[0027] The following describes in detail the specific structure of a dual-channel thermopile temperature sensor calibration device provided by an embodiment of the present invention, according to the appendix. Figure 1 As shown, the device includes a support assembly 10, an adjusting member 4, a water temperature plate 5, a microcrystalline panel 7, and a heat source 8. The water temperature plate 5 is fixedly connected to the support assembly 10, and the adjusting member 4 is arranged around the water temperature plate 5. The adjusting member 4 is vertically adjustable relative to the water temperature plate 5. The microcrystalline panel 7 is arranged on the adjusting member 4, and the adjusting member 4, the microcrystalline panel 7, and the water temperature plate 5 enclose an internal space. A thermopile temperature sensor 6 is fixed to the top surface of the water temperature plate 5. The heat source 8 is placed above the microcrystalline panel 7. A water flow channel is provided inside the water temperature plate 5. A water supply pipe 3 is connected to the water flow channel.

[0028] The support assembly 10 is used to fix and support the water temperature pan 5. The adjusting member 4 is arranged around the water temperature pan 5, and the microcrystalline panel 7 is covered by the adjusting member 4. The adjusting member 4, the microcrystalline panel 7, and the water temperature pan 5 together form an internal space, which is used to house the dual-channel thermopile temperature sensor 6 and provide measurement space. The adjusting member 4 is adjustablely arranged on the water temperature pan 5, so it can be adjusted in the vertical direction to adjust the distance between the microcrystalline panel 7 and the upper surface of the water temperature pan 5. Figure 3 As shown, two water pipes 3 are connected to the water flow channel inside the water temperature plate 5. One water pipe 3 is used to input cooling water, and the other water pipe 3 is used to output hot water. The two water pipes 3 and the water flow channel form a closed-loop water circuit. The closed-loop water circuit circulates through an external pump. The dual-channel thermopile temperature sensor 6 is fixed on the top surface of the water temperature plate 5, and the heat source 8 can be suspended above the microcrystalline panel 7.

[0029] like Figure 4 As shown, the sensor 6 has two detection channels. The first detection channel 61 (first probe) can detect infrared light corresponding to band A, and the second detection channel 62 (second probe) can detect infrared light corresponding to band B. Band A and band B have no overlap. By setting filters of different infrared wavelengths at the two probes, the probes of the two bands can be assembled into one sensor 6 to obtain a dual-channel thermopile temperature sensor 6.

[0030] The detection process of sensor 6 is as follows: cooling water pipe 3 circulates to control the temperature of water temperature plate 5 to simulate ambient temperature; rotating adjustment component 4 pushes microcrystalline panel 7 up and down to precisely adjust the distance between sensor 6 and heat source 8; infrared radiation emitted by heat source 8 is filtered by microcrystalline panel 7 and the first detection channel 61 of sensor 6 realizes the detection of composite signal of heat source 8 and panel, while the second detection channel 62 directly detects panel signal.

[0031] In a more specific embodiment, the adjusting member 4 is an annular adjusting member 4, the inner wall of the annular adjusting member 4 is provided with an internal thread, and the outer surface of the water temperature plate 5 is provided with an external thread adapted to the internal thread. Specifically, the adjusting member 4 can be set as a threaded sleeve made of brass, which is also the annular adjusting member 4, and the water temperature plate 5 is set as a circle; the inner wall of the adjusting member 4 is provided with an internal thread and the outer surface of the water temperature plate 5 is provided with an external thread, such as setting the thread pitch to 0.5mm; then one rotation can adjust the distance between the sensor 6 and the heat source 8 by 1mm.

[0032] The signal detection process of the microcrystalline panel 7 includes: circulating cooling water through the water pipe 3 to control the temperature of the water temperature plate 5 to simulate ambient temperature; rotating the adjusting component 4 to push the microcrystalline panel 7 up and down to precisely adjust the distance between the sensor 6 and the heat source 8; the heat source 8 has a through hole in its central area, and when placed on the microcrystalline panel 7, the heat source 8 heats the edges of the microcrystalline panel 7, and the heat is conducted to the central area of ​​the microcrystalline panel 7, emitting infrared radiation. At this time, the sensor 6 detects the infrared radiation in the central area, and the signal of the microcrystalline panel 7 detected by the first detection channel 61 of the sensor 6 can be obtained. Finally, through analysis algorithm, combined with the test data of the first detection channel 61 and the second detection channel 62, the radiation signal of the heat source 8 is calculated.

[0033] Remove the microcrystalline panel 7, replace the heat source 8 with a standard blackbody, adjust the temperature of the water temperature plate 5 to match the test temperature, and then adjust the emissivity until the detected voltage signal matches the test signal result. This yields the standard blackbody mapping relationship, thus completing the calibration of sensor 6. Setting the detection signal to a standard blackbody ensures consistency with the test signal obtained without a standard blackbody. This means that under two different test environments, the signal value of the first detection channel 61 or the second detection channel 62 and the heat source temperature value are consistent. Independent comparison of the two channels is necessary during this process. After completing the test using the "sensor 6-microcrystalline panel 7-heat source 8" test system (referred to as test system 1), the correspondence between the detected voltage signal and the heat source temperature value can be obtained. After the initial test, a blackbody can be used to replace the microcrystalline panel 7 and the heat source 8. For example, if the blackbody temperature is set to 100°C and the blackbody emissivity is adjusted until the detection voltage signal in the first detection channel 61 is consistent with the voltage signal of the first detection channel 61 under the test system 1, the blackbody can be used to replace the microcrystalline panel 7 and the heat source 8 to complete the calibration of the first detection channel 61. The second detection channel 62 can be calibrated in the same way. The method of replacing with a blackbody can simplify the subsequent calibration process.

[0034] In a more specific embodiment, the diameter of the water flow channel is 3-8 mm. Specifically, as shown... Figure 1 As shown, the thermopile temperature sensor 6 is mounted on a fixing block, and the fixing block is embedded in the fixing hole 51 provided on the top surface of the water temperature plate 5.

[0035] Furthermore, the material of the water temperature plate 5 can be set to copper or silver to improve the heat conduction efficiency of the water temperature plate 5. In order to improve the heat exchange efficiency of water circulation, the diameter of the water flow channel can be set to 3-8mm; in the preferred embodiment, the diameter of the water flow channel can be set to 6mm.

[0036] Furthermore, to achieve a tight fixation of the sensor 6, the sensor 6 can be mounted on a fixing block. The fixing block is embedded in the fixing hole 51 on the top surface of the water temperature plate 5 through a slot. The fixing block can be square, round or hexagonal to adapt to the sensor 6 with different structures. The fixing block has a slot on its side, and the inner wall of the fixing hole 51 has a protrusion that matches the slot. The slot and the protrusion on the inner wall of the fixing hole are engaged and connected to achieve a tight fixation of the sensor 6 through the fixing block.

[0037] In a more specific embodiment, the microcrystalline panel 7 is a borosilicate glass plate. The surface of the microcrystalline panel 7 is either planar or has a surface with uneven microstructures.

[0038] Specifically, the microcrystalline panel 7 can be set as a borosilicate glass plate. Depending on the actual product being tested, the microcrystalline panel 7 can be set with different structures, such as a microcrystalline panel 7 with a flat surface or a microcrystalline panel 7 with a surface with concave and convex microstructures.

[0039] In a more specific embodiment, the heat source 8 is a blackbody, an electric cooker, or a heating aluminum block. For example, Figure 2 As shown, the sidewall of the adjusting member 4 is provided with a plurality of grooves 41, and the openings of the grooves 41 are located on the side of the adjusting member 4 facing the microcrystalline panel 7. In a specific embodiment, at least three grooves 41 may be provided on the sidewall of the adjusting member 4, and the plurality of grooves 41 are evenly arranged along the outer periphery of the adjusting member 4; for example Figure 2 In this embodiment, three grooves 41 are evenly arranged on the side wall of the adjusting member 4, and the included angle between two adjacent grooves 41 is 120°. In other embodiments, more grooves 41 can be evenly arranged along the outer periphery of the adjusting member 4.

[0040] In practice, a blackbody, an electric heating pot, or a heating aluminum block can be selected as the heat source 8, which can emit infrared radiation outward. Multiple grooves 41 can be provided on the side wall of the adjusting component 4 to assist in heat dissipation; to improve the heat dissipation effect, the opening of the groove 41 can be located on the side of the adjusting component 4 facing the microcrystalline panel 7.

[0041] In a more specific embodiment, the support assembly 10 includes a base 1 and at least one support rod 2; one end of the support rod 2 is fixed to the base 1, and the other end of the support rod 2 is fixedly connected to the bottom surface of the water temperature plate 5. The support assembly 10 contains at least three support rods 2, which are evenly arranged around the center point of the base 1. Figure 1 As shown, this application provides three support rods 2 to support the water temperature plate 5, and the three support rods 2 are arranged in a triangle; in other embodiments, more support rods 2 can be provided to support the water temperature plate 5.

[0042] Furthermore, a laser ranging module can be installed on the side wall of the support rod 2. This laser ranging module can provide real-time feedback on the distance L1 between the set position (the set position of the laser ranging module) and the microcrystalline panel 7. Subtracting the fixed distance L0 between the set position and the surface of the sensor 6 from L1 yields the distance L2 between the surface of the sensor 6 and the microcrystalline panel 7, i.e., L2 = L1 - L0. By obtaining the distance between the sensor 6 and the microcrystalline panel 7 in real time, manual adjustment can be replaced, and the repeatability of calibration can be improved.

[0043] The specific steps for calibrating sensor 6 can be summarized as follows: S1, embed the fixing block adapted to the structure of sensor 6 into the fixing hole 51 of the water temperature plate 5; S2, connect the water supply pipe 3 to the constant temperature circulation system and set the target water temperature; S3, rotate the adjusting component 4 to adjust the distance between the microcrystalline panel 7 and sensor 6 to the calibration value; S4, start the heat source 8 and stabilize it to the set temperature; S5, record the dual-channel output signal for analysis and processing. The calibration device disclosed in this application adjusts the distance between sensor 6, microcrystalline panel 7, and heat source 8 by adjusting the adjusting component 4 in the vertical direction, and controls the temperature of heat source 8 to ultimately achieve ambient temperature control and target temperature control, while being compatible with the calibration of sensors 6 with different structures.

[0044] This invention provides a calibration device for a dual-channel thermopile temperature sensor 6. The device includes a support assembly 10, an adjusting member 4, a water temperature pan 5, a microcrystalline panel 7, and a heat source 8. The water temperature pan 5 is fixedly connected to the support assembly 10, and the adjusting member 4 is arranged around the water temperature pan 5. The adjusting member 4 is vertically adjustable relative to the water temperature pan 5. The microcrystalline panel 7 is disposed on the adjusting member 4, and the adjusting member 4, the microcrystalline panel 7, and the water temperature pan 5 enclose an internal space. The thermopile temperature sensor 6 is fixed to the top surface of the water temperature pan 5. The heat source 8 is placed above the microcrystalline panel 7. A water flow channel is provided inside the water temperature pan 5. A water supply pipe 3 is connected to the water flow channel. This calibration device can simultaneously and accurately control the distance to the heat source 8 and the ambient temperature, thereby being compatible with the calibration requirements of dual-channel thermopile sensors 6 with different structures and improving the calibration efficiency of the dual-channel thermopile temperature sensor 6.

[0045] The above description is merely a specific embodiment of the present invention, but the scope of protection of the present invention is not limited thereto. Any person skilled in the art can easily conceive of various equivalent modifications or substitutions within the technical scope disclosed in the present invention, and these modifications or substitutions should all be covered within the scope of protection of the present invention. Therefore, the scope of protection of the present invention should be determined by the scope of the claims.

Claims

1. A calibration device for a dual-channel thermopile temperature sensor, characterized in that, The device includes a support assembly, an adjustment component, a water temperature plate, a microcrystalline panel, and a heat source; The water temperature plate is fixedly connected to the support assembly, and the adjusting member is arranged around the water temperature plate; the adjusting member is vertically adjustable relative to the water temperature plate. The microcrystalline panel is disposed on the adjusting member, and the adjusting member, the microcrystalline panel, and the water temperature plate enclose an internal space; the thermopile temperature sensor is fixed to the top surface of the water temperature plate; The heat source is positioned above the microcrystalline panel; The water temperature plate has a water flow channel inside; the water supply pipe is connected to the water flow channel.

2. The dual-channel thermopile temperature sensor calibration device according to claim 1, characterized in that, The adjusting component is a circular adjusting component, the inner side wall of which is provided with an internal thread, and the outer side of the water temperature plate is provided with an external thread that matches the internal thread.

3. The dual-channel thermopile temperature sensor calibration device according to claim 2, characterized in that, The diameter of the water flow channel is 3-8 mm.

4. The dual-channel thermopile temperature sensor calibration device according to claim 3, characterized in that, The thermopile temperature sensor is mounted on a fixing block, which is embedded in a fixing hole on the top surface of the water temperature plate.

5. The dual-channel thermopile temperature sensor calibration device according to any one of claims 1-4, characterized in that, The microcrystalline panel is a borosilicate glass plate.

6. The dual-channel thermopile temperature sensor calibration device according to claim 5, characterized in that, The surface of the microcrystalline panel is flat, or the surface of the microcrystalline panel has a concave-convex microstructure.

7. The dual-channel thermopile temperature sensor calibration device according to claim 6, characterized in that, The heat source is a blackbody, an electric cooker, or a heated aluminum block.

8. The dual-channel thermopile temperature sensor calibration device according to claim 7, characterized in that, The sidewall of the adjusting member is provided with a plurality of grooves, the openings of which are located on the side of the adjusting member facing the microcrystalline panel.

9. The dual-channel thermopile temperature sensor calibration device according to any one of claims 1-4, characterized in that, The support assembly includes a base and at least one support rod; one end of the support rod is fixed to the base, and the other end of the support rod is fixedly connected to the bottom surface of the water temperature plate.

10. The dual-channel thermopile temperature sensor calibration device according to claim 9, characterized in that, The support assembly includes at least three support rods, which are evenly arranged around the center point of the base.

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