CN220437618U - Low-temperature surface temperature sensor calibrating device - Google Patents
Low-temperature surface temperature sensor calibrating device Download PDFInfo
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- CN220437618U CN220437618U CN202321778949.5U CN202321778949U CN220437618U CN 220437618 U CN220437618 U CN 220437618U CN 202321778949 U CN202321778949 U CN 202321778949U CN 220437618 U CN220437618 U CN 220437618U
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- BASFCYQUMIYNBI-UHFFFAOYSA-N platinum Chemical compound [Pt] BASFCYQUMIYNBI-UHFFFAOYSA-N 0.000 claims abstract description 100
- 229910052697 platinum Inorganic materials 0.000 claims abstract description 50
- 238000012360 testing method Methods 0.000 claims abstract description 25
- 238000009434 installation Methods 0.000 claims abstract description 9
- RYGMFSIKBFXOCR-UHFFFAOYSA-N Copper Chemical compound [Cu] RYGMFSIKBFXOCR-UHFFFAOYSA-N 0.000 claims description 4
- 229910052802 copper Inorganic materials 0.000 claims description 4
- 239000010949 copper Substances 0.000 claims description 4
- 239000000463 material Substances 0.000 claims 1
- 238000009529 body temperature measurement Methods 0.000 description 10
- 238000010586 diagram Methods 0.000 description 6
- 238000005259 measurement Methods 0.000 description 6
- 238000001514 detection method Methods 0.000 description 3
- 238000005516 engineering process Methods 0.000 description 3
- 230000007123 defense Effects 0.000 description 2
- 229910052782 aluminium Inorganic materials 0.000 description 1
- XAGFODPZIPBFFR-UHFFFAOYSA-N aluminium Chemical compound [Al] XAGFODPZIPBFFR-UHFFFAOYSA-N 0.000 description 1
- 230000009286 beneficial effect Effects 0.000 description 1
- 239000013065 commercial product Substances 0.000 description 1
- 238000004891 communication Methods 0.000 description 1
- 230000007547 defect Effects 0.000 description 1
- 238000011161 development Methods 0.000 description 1
- 230000006872 improvement Effects 0.000 description 1
- 238000009776 industrial production Methods 0.000 description 1
- 239000007788 liquid Substances 0.000 description 1
- 239000007769 metal material Substances 0.000 description 1
- 238000000034 method Methods 0.000 description 1
- 238000012986 modification Methods 0.000 description 1
- 230000004048 modification Effects 0.000 description 1
- 230000008569 process Effects 0.000 description 1
- 238000011160 research Methods 0.000 description 1
- 239000007787 solid Substances 0.000 description 1
- 238000003466 welding Methods 0.000 description 1
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- Measuring Temperature Or Quantity Of Heat (AREA)
Abstract
The utility model belongs to the field of surface sensor calibration, and discloses a low-temperature surface temperature sensor calibration device which comprises a low-temperature constant-temperature tank, a test platform, a right-angle precise platinum resistance thermometer and a rod-type precise platinum resistance thermometer; the test platform is embedded in the low-temperature constant-temperature tank in a removable way to form a low-temperature field; the test platform comprises an isothermal tank, wherein the isothermal tank is provided with a horizontal first temperature measuring plane and a vertical second temperature measuring plane; the right-angle precise platinum resistance thermometer is detachably arranged at the bottom of the first temperature measuring plane, and the temperature sensing head of the right-angle precise platinum resistance thermometer is close to the center of the first temperature measuring plane at the installation position; the rod-type precise platinum resistance thermometer is detachably arranged on the side face of the second temperature measuring plane, and the temperature sensing head of the rod-type precise platinum resistance thermometer is close to the intersection center of the first temperature measuring plane and the second temperature measuring plane at the installation position. The calibrating device can meet the calibrating requirements of various surface temperature sensors in the market, the calibrating range is as low as-30 ℃, and the calibrating device is simple and convenient to operate and high in measuring accuracy.
Description
Technical Field
The utility model belongs to the field of low-temperature surface temperature sensor calibration, and particularly relates to a low-temperature surface temperature sensor calibration device.
Background
Along with the rapid development of national defense technology, the surface temperature measurement technology also shows an important position. The importance of measuring the temperature of a solid surface is no less than the importance of measuring the temperature of the liquid or gaseous medium itself. The surface temperature sensor is widely applied to national defense science and technology, industrial production and scientific research work. Due to the complexity of the surface temperature measurement conditions, it is very difficult to accurately measure the surface temperature of an object, and it is necessary to calibrate the surface temperature sensor with a relatively accurate measurement result, among other factors. Along with the continuous improvement of the accuracy of the surface thermometer and the continuous widening of the measuring range of the thermometer, the existing detection means are behind the display, and especially the device for calibrating the surface temperature sensor for measuring the negative temperature cannot meet the requirements of the increasingly developed calibration market.
Disclosure of Invention
Aiming at the defects of the prior art, the utility model provides the low-temperature surface temperature sensor calibration device which can meet the calibration requirements of various surface temperature sensors on the market, has a calibration range as low as-30 ℃, and is simple and convenient to operate and high in calibration precision.
In order to achieve the above purpose, the present utility model provides the following technical solutions:
the low-temperature surface temperature sensor calibration device is characterized by comprising a low-temperature constant-temperature tank, a test platform, a right-angle precise platinum resistance thermometer and a rod-type precise platinum resistance thermometer; the test platform is embedded in the low-temperature constant-temperature tank in a removable way to form a low-temperature field; the test platform comprises an isothermal tank, wherein the isothermal tank is provided with a horizontal first temperature measuring plane and a vertical second temperature measuring plane; the right-angle precise platinum resistance thermometer is detachably arranged at the bottom of the first temperature measuring plane, and the temperature sensing head of the right-angle precise platinum resistance thermometer is close to the center of the first temperature measuring plane at the installation position; the rod-type precise platinum resistance thermometer is detachably arranged on the side face of the second temperature measuring plane, and the temperature sensing head of the rod-type precise platinum resistance thermometer is close to the intersection center of the first temperature measuring plane and the second temperature measuring plane at the installation position.
Preferably, the isothermal tank has a cylindrical structure with a major arc hole, and a major arc hole bottom plane and a major arc hole side plane of the isothermal tank are respectively used as the first temperature measurement plane and the second temperature measurement plane.
Further preferably, a first mounting hole for inserting the right-angle precise platinum resistance thermometer is formed in the bottom of the isothermal tank, the center line of the first mounting hole is located on the symmetrical center plane of the first temperature measuring plane and is parallel to the first temperature measuring plane, and the distance between the upper edge of the first mounting hole and the first temperature measuring plane is smaller than 2mm.
Further preferably, a second mounting hole for inserting a rod type precise platinum resistance thermometer is formed in the side face of the isothermal tank; the center line of the second mounting hole is positioned on the vertical symmetrical center plane of the second temperature measuring plane and is parallel to the second temperature measuring plane, the distance between the inner edge of the second mounting hole and the second temperature measuring plane is less than 2mm, and the hole bottom of the second mounting hole and the first temperature measuring plane are coplanar.
Preferably, the isothermal tank is made of red copper.
Preferably, the flatness of the first temperature measuring plane and the second temperature measuring plane is smaller than 0.02mm.
Preferably, the test platform further comprises a supporting seat, wherein the supporting seat is in a circular ring shape, the outer diameter of the supporting seat is larger than that of the isothermal groove, and a major arc hole which is the same as the major arc hole of the isothermal groove is formed in the supporting seat; the supporting seat is fixedly connected with the upper end of the isothermal tank.
Further preferably, the support seat is provided with a U-shaped groove and an upper mounting hole for mounting the right-angle precise platinum resistance thermometer and the rod-type precise platinum resistance thermometer respectively.
Further preferably, a plurality of pin holes for installing the support pins are formed in the support seat in a central symmetry manner.
Further preferably, the support seat is provided with at least one handle hole for installing the handle in a central symmetry manner.
Compared with the prior art, the utility model has the beneficial effects that:
1. the utility model adopts the cylindrical test platform with the major arc hole to provide the calibration temperature field of the surface temperature sensor to be tested, provides two temperature measuring surfaces of the bottom surface and the side surface, has strong adaptability, and meets the calibration requirements of various surface temperature sensors on the market.
2. The utility model adopts the movable precise platinum resistance thermometer with two shapes as the temperature measurement standard to be matched with the two temperature measurement surfaces to respectively realize the calibration of the surface temperature sensors to be measured with different shapes, and the utility model has convenient and reliable installation and use.
3. The mounting structure of the precise platinum resistance thermometer provided by the utility model ensures that the temperature sensing head of the precise platinum resistance thermometer in the calibration process is adjacent to the calibration temperature measuring point of the surface temperature sensor to be measured, and the calibration precision is high.
Drawings
FIG. 1 is a schematic diagram of a calibration device for a low temperature surface temperature sensor according to an embodiment of the present utility model;
FIG. 2 is a schematic diagram of a test platform according to an embodiment of the present utility model;
FIG. 3 is a schematic diagram of a test platform according to an embodiment of the present utility model;
FIG. 4 is a schematic diagram of a precise platinum resistance thermometer mounting structure according to an embodiment of the present utility model;
FIG. 5 is a schematic diagram showing an operation state of a calibration device for a low-temperature surface temperature sensor according to an embodiment of the present utility model;
fig. 6 is a second schematic diagram illustrating an operating state of the low-temperature surface temperature sensor calibration device according to an embodiment of the utility model.
In the figure: 1. the low-temperature constant temperature tank 101, a cylindrical tank 2, a test platform 3, a right-angle precise platinum resistance thermometer, a rod-type precise platinum resistance thermometer 4, an isothermal tank 21, an isothermal tank 211, a second mounting hole 212, a first mounting hole 213, a first temperature measuring plane 214, a second temperature measuring plane 22, a supporting seat 221, an upper mounting hole 222, a U-shaped tank 223, a foot nail hole 224 and a handle hole.
Detailed Description
In order that the manner in which the above-recited features, advantages, objects and advantages of the present utility model are attained and can be understood in detail, a more particular description of the utility model, briefly summarized above, may be had by reference to the embodiments thereof which are illustrated in the appended drawings.
It should be noted that, in the description of the present utility model, the directions or positional relationships indicated by the terms "center", "upper", "lower", "left", "right", "vertical", "horizontal", "inner", "outer", etc. are directions or positional relationships based on the drawings, are merely for convenience of describing the present utility model and simplifying the description, and do not indicate or imply that the apparatus or element to be referred to must have a specific direction, be configured and operated in the specific direction, and thus should not be construed as limiting the present utility model; the terms "first," "second," "third," and the like, are used for descriptive purposes only and are not to be construed as indicating or implying relative importance, and furthermore, unless explicitly specified and limited otherwise, the terms "mounted," "connected," "coupled," and the like are to be construed broadly, and may be fixedly coupled, detachably coupled, or integrally coupled, for example; can be mechanically or electrically connected; can be directly connected or indirectly connected through an intermediate medium, and can be communication between two elements. When two elements are "fixedly connected" or "pivotally connected," the two elements may be directly connected or intervening elements may also be present. In contrast, when an element is referred to as being "directly on" another element, there are no intervening elements present. The fixed connection or the fixed connection mode can be screw connection or welding or riveting or plugging connection or connection through a third component. The specific meaning of the above terms in the present utility model will be understood in specific cases by those of ordinary skill in the art.
As shown in fig. 1, a low-temperature surface temperature sensor calibration device in this embodiment is used for calibrating a low-temperature surface temperature sensor, and includes a low-temperature constant-temperature tank 1, a test platform 2, a right-angle precise platinum resistance thermometer 3, and a bar-type precise platinum resistance thermometer 4.
The low-temperature constant temperature tank 1 is a commercial product, a cylindrical tank 101 is arranged on the low-temperature constant temperature tank, a refrigerating medium is arranged in the low-temperature constant temperature tank, and a low-temperature environment is provided; the constant temperature bath has excellent constant temperature performance, and the low temperature constant temperature bath 1 selected in the embodiment can provide a constant temperature environment of (-30-room temperature) DEG C, the uniformity reaches 0.1 ℃ and the stability reaches 0.1 ℃/10min.
In the calibration operation, the test platform 2 is embedded in the cylindrical groove 101, and the outer surface of the test platform is contacted with the refrigerating medium, so that the inside of the test platform is formed with a low Wen Wenchang for calibrating the surface temperature sensor; the right-angle precise platinum resistance thermometer 3 and the rod-type precise platinum resistance thermometer 4 are used for providing calibration surface temperature standards, and are selected according to the shape and the type of the surface temperature sensor to be calibrated in the calibration operation.
As shown in fig. 2 and 3, the test platform 2 includes an isothermal tank 21 and a support base 22; the isothermal tank 21 is made of a metal material with good heat conduction performance, such as copper, red copper, aluminum and the like, so as to realize isothermal temperature of each part of the isothermal tank; is cylindrical and has a major arc inner hole. The support seat 22 is in a circular ring shape, the outer diameter of the support seat is larger than that of the isothermal groove 21, and a major arc hole which is the same as the major arc inner hole of the isothermal groove 21 is formed in the support seat; the supporting seat 22 is fixedly connected with the upper end of the isothermal tank 21 and is used for supporting the test platform 2 at the edge of the cylindrical tank 101 of the low-temperature isothermal tank 1. Preferably, a plurality of foot nail holes 223 for installing and supporting foot nails are symmetrically formed in the center of the supporting seat 22, the foot nails are used for adjusting the installation height and the posture of the test platform 2, and meanwhile, the contact friction between the supporting seat 22 and the platform of the low-temperature constant-temperature groove 1 is reduced; the supporting seat 22 is also provided with a plurality of handle holes 224 for installing handles in a central symmetry way, so that the test platform 2 can be conveniently taken and put on the low-temperature constant-temperature tank 1.
The bottom of the major arc inner hole and the side plane of the major arc inner hole of the isothermal groove 21 are used as a first temperature measuring plane 213 and a second temperature measuring plane 214, and the two mutually perpendicular temperature measuring planes are respectively matched with the right-angle precise platinum resistance thermometer 3 and the rod-type precise platinum resistance thermometer 4 to realize the calibration of different types of surface temperature sensors. As shown in fig. 4, a first mounting hole 212 for inserting the right-angle precise platinum resistance thermometer 3 is formed in the bottom of the isothermal tank 21, and the center line of the first mounting hole 212 is located on the symmetrical center plane of the first temperature measuring plane 213 and is parallel to the first temperature measuring plane 213; meanwhile, the distance between the upper edge of the first mounting hole 212 and the first temperature measurement plane 213 is less than 2mm; the temperature sensing head of the right-angle precise platinum resistance thermometer 3 is adjacent to the temperature sensing head of the measured surface sensor, so that measurement errors caused by different measuring points are reduced; correspondingly, the U-shaped groove 222 is formed on the supporting seat 22, so that the right-angle precise platinum resistance thermometer 3 can be conveniently inserted. A second mounting hole 211 for inserting the rod-type precise platinum resistance thermometer 4 is formed in the outer side of the side plane of the isothermal groove 21, and the center line of the second mounting hole 211 is positioned on the vertical symmetrical center plane of the second temperature measuring plane 214 and is parallel to the second temperature measuring plane 214; the distance between the inner edge of the second mounting hole 211 and the second temperature measuring plane 214 is less than 2mm, and the hole bottom of the second mounting hole is coplanar with the first temperature measuring plane 213; the temperature sensing head of the rod-type precise platinum resistance thermometer 4 is adjacent to the temperature sensing head of the surface sensor to be measured, so that measurement errors caused by different measuring points are reduced; correspondingly, the support seat 22 is provided with an upper mounting hole 221 which is coaxial and communicated with the second mounting hole 211.
In order to improve repeatability and stability of calibration operation, the first temperature measuring plane 213 and the second temperature measuring plane 214 are provided with smooth surfaces, and the flatness is smaller than 0.02mm.
The first temperature measuring plane 213 is matched with the right-angle precise platinum resistance thermometer 3, and is used for a temperature sensing head to be placed in and attached to a surface temperature sensor to be measured, such as a dead weight type surface temperature sensor, at the bottom of an inner hole of the isothermal tank 21. As shown in fig. 5, in calibration, the cross bar of the right-angle precise platinum resistance thermometer 3 is inserted into the first mounting hole 212, and the vertical bar of the cross bar is embedded into the U-shaped groove 222 and is attached to the outer surface of the isothermal groove 21, so that the temperature sensing head of the cross bar coincides with the center of the circular arc bottom surface. Then, the test platform 2 inserted with the right-angle precise platinum resistance thermometer 3 is embedded into the cylindrical groove 101 of the low-temperature constant-temperature groove 1, so that the first temperature measuring plane 213 is immersed into the refrigerating medium to a depth of more than 200mm. After the installation is stable, the temperature sensing head of the dead weight type surface temperature sensor to be measured is placed on the first temperature measuring plane 213, after the indication value is stable, the readings of the dead weight type surface temperature sensor to be measured and the right-angle precise platinum resistance thermometer 3 are respectively read, the two indication values are compared, and the sensor is calibrated. To improve the measurement accuracy, the surface temperature sensor to be measured is designed to be placed at a plurality of positions on the first temperature measurement plane 213, such as the center and the edge, to measure the temperature, to fit the measurement result, and to correct the measurement error. Through detection, the uniformity and stability of the temperature field of the first temperature measurement plane 213 completely meet the calibration standard requirements of the JJF1409-2013 surface thermometer.
The second temperature measuring plane 214 is matched with the rod-type precise platinum resistance thermometer 4 and is used for a measured surface temperature sensor, such as a right-angle surface temperature sensor, of which the temperature sensing head cannot be attached to the bottom of the inner hole of the isothermal tank 21. As shown in fig. 6, when calibrating such a surface temperature sensor, the rod-type precision platinum resistance thermometer 4 is inserted into the second mounting hole 211 so that the temperature sensing head thereof is close to the intersection center of the first temperature measuring plane (213) and the second temperature measuring plane (214); similarly, after the test platform 2 is embedded into the cylindrical groove 101 of the low-temperature constant-temperature groove 1, the right-angle surface temperature sensor to be tested is placed at the bottom of the inner hole of the constant-temperature groove 21, and the temperature sensing head of the right-angle surface temperature sensor is attached to the bottom of the second temperature measuring plane 214; after the indication value is stable, the readings of the measured right-angle surface temperature sensor and the rod-type precise platinum resistance thermometer 4 are respectively read, and the two indication values are compared to calibrate the sensor. Considering that the diameters of the surface thermocouple ends of the various right-angle surface temperature sensors are different, the stability and uniformity of the temperature field of the second temperature measuring plane 214 in the vertical direction can meet the technical indexes required by the existing specifications. Through detection, the uniformity of the vertical temperature field of the second temperature measurement plane 214 is better than 0.2 ℃, the stability is better than 0.2 ℃/10min, and the calibration standard requirements of the JF1409-2013 surface thermometer are completely met.
The above embodiments are preferred embodiments of the present utility model and are not intended to limit the scope of the present utility model, and various modifications or variations which may be made by those skilled in the art without the inventive effort within the scope of the appended claims remain within the scope of this patent.
Claims (10)
1. The low-temperature surface temperature sensor calibration device is characterized by comprising a low-temperature constant-temperature tank (1), a test platform (2), a right-angle precise platinum resistance thermometer (3) and a rod-type precise platinum resistance thermometer (4);
wherein, the test platform (2) is embedded in the low-temperature constant-temperature groove (1) in a removable way to form a low-temperature field; the test platform (2) comprises an isothermal tank (21), wherein the isothermal tank (21) is provided with a horizontal first temperature measuring plane (213) and a vertical second temperature measuring plane (214);
the right-angle precise platinum resistance thermometer (3) is detachably arranged at the bottom of the first temperature measuring plane (213), and a temperature sensing head of the right-angle precise platinum resistance thermometer is close to the center of the first temperature measuring plane (213) at an installation position;
the rod-type precise platinum resistance thermometer (4) is detachably arranged on the side face of the second temperature measuring plane (214), and in an installation position, a temperature sensing head of the rod-type precise platinum resistance thermometer is close to the intersection line center of the first temperature measuring plane (213) and the second temperature measuring plane (214).
2. A low temperature surface temperature sensor calibration device according to claim 1, characterized in that the isothermal tank (21) is a cylindrical structure with a major arc hole, the major arc hole bottom plane and major arc hole side plane of which are the first temperature measuring plane (213) and the second temperature measuring plane (214), respectively.
3. The low-temperature surface temperature sensor calibration device according to claim 2, wherein a first mounting hole (212) for inserting the right-angle precise platinum resistance thermometer (3) is formed in the bottom of the isothermal tank (21), the center line of the first mounting hole (212) is located on the symmetrical center plane of the first temperature measuring plane (213) and parallel to the first temperature measuring plane (213), and the distance between the upper edge of the first mounting hole and the first temperature measuring plane (213) is smaller than 2mm.
4. The low-temperature surface temperature sensor calibration device according to claim 2, wherein a second mounting hole (211) for inserting a rod-type precise platinum resistance thermometer (4) is formed in the side surface of the isothermal tank (21); the center line of the second mounting hole (211) is positioned on the vertical symmetrical center plane of the second temperature measuring plane (214) and is parallel to the second temperature measuring plane (214), the distance between the inner edge of the second mounting hole and the second temperature measuring plane (214) is smaller than 2mm, and the hole bottom of the second mounting hole and the first temperature measuring plane (213) are coplanar.
5. A low temperature surface temperature sensor calibration device according to claim 1, characterized in that the material of the isothermal tank (21) is red copper.
6. A low temperature surface temperature sensor calibration device according to claim 1, wherein the flatness of the first temperature measuring plane (213) and the second temperature measuring plane (214) is less than 0.02mm.
7. The low-temperature surface temperature sensor calibration device according to claim 1, wherein the test platform (2) further comprises a supporting seat (22), the supporting seat (22) is in a circular ring shape, the outer diameter of the supporting seat is larger than the outer diameter of the isothermal groove (21), and a major arc hole which is the same as the major arc hole of the isothermal groove (21) is formed in the supporting seat; the supporting seat (22) is fixedly connected with the upper end of the isothermal tank (21).
8. The low-temperature surface temperature sensor calibration device according to claim 7, wherein the supporting seat (22) is provided with a U-shaped groove (222) and an upper mounting hole (221) for mounting the right-angle precise platinum resistance thermometer (3) and the rod-type precise platinum resistance thermometer (4) respectively.
9. The low temperature surface temperature sensor calibration device according to claim 7, wherein a plurality of pin holes (223) for mounting the support pins are formed in the support base (22) in a central symmetry manner.
10. A low temperature surface temperature sensor calibration device according to claim 7, wherein the support base (22) is provided with at least one handle hole (224) for mounting a handle in a central symmetry.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN202321778949.5U CN220437618U (en) | 2023-07-07 | 2023-07-07 | Low-temperature surface temperature sensor calibrating device |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN202321778949.5U CN220437618U (en) | 2023-07-07 | 2023-07-07 | Low-temperature surface temperature sensor calibrating device |
Publications (1)
| Publication Number | Publication Date |
|---|---|
| CN220437618U true CN220437618U (en) | 2024-02-02 |
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Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| CN202321778949.5U Active CN220437618U (en) | 2023-07-07 | 2023-07-07 | Low-temperature surface temperature sensor calibrating device |
Country Status (1)
| Country | Link |
|---|---|
| CN (1) | CN220437618U (en) |
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2023
- 2023-07-07 CN CN202321778949.5U patent/CN220437618U/en active Active
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