Handheld temperature sensor calibrator and calibration system
By designing a handheld temperature sensor verifier, using the combination of inner tube, heating element, insulation component and standard temperature measuring element, the problem of difficulty in on-site verification of temperature sensors in the prior art is solved, and an efficient and accurate calibration process is achieved.
Patent Information
- Application Number
- CN202420691042.3
- Authority / Receiving Office
- CN · China
- Patent Type
- Utility models(China)
- Current Assignee / Owner
- Filing Date
- 2024-04-03
- Publication Date
- 2025-03-11
- Estimated Expiration
- 2034-04-03
AI Technical Summary
The prior art is difficult to check the temperature sensor on site, and it requires repeated disassembly and plugging, so it is impossible to judge whether the sensor is in normal use in real time.
A handheld temperature sensor verifier is designed, including an inner tube, heating element, insulation component, handheld housing and standard temperature measuring element. It can be checked without disassembling the sensor. Through the cooperation of the heating element and standard temperature measuring element, the output value of the sensor can be detected in real time.
On-site calibration of the temperature sensor is realized, the steps of repeated disassembly and plugging are avoided, the calibration efficiency and accuracy are improved, and the operation is facilitated by personnel.
Smart Images
Figure CN222599010U_ABST
Abstract
Description
Technical Field
[0001] The utility model relates to the technical field of sensor calibration, in particular to a handheld temperature sensor calibrator and a calibration system. Background Art
[0002] When the output temperature value of the temperature sensor deviates during use, the following methods can be used to determine whether the temperature sensor is used normally:
[0003] 1. Use a multimeter to measure the resistance wire of the temperature sensor and judge by the resistance value combined with the actual temperature output;
[0004] 2. Use the current range of the multimeter to measure the output current of the temperature transmitter connected to the temperature sensor in series. Compare the measured result with the displayed temperature to make a judgment.
[0005] 3. At regular intervals, disassemble the sensor as a whole and send it to a qualified unit authorized by the State Quality Supervision Bureau for calibration.
[0006] When using the first method, the sensor needs to be disassembled to measure the resistance. When using the second method, the sensor connection line needs to be repeatedly disassembled and installed. The third method is a periodic inspection, which cannot determine on-site whether the temperature sensor is used normally.
[0007] Therefore, how to provide a calibrator that is convenient for on-site calibration of temperature sensors is one of the technical problems that those skilled in the art need to solve. Utility Model Content
[0008] The purpose of the utility model is to provide a handheld temperature sensor calibrator, which does not require repeated disassembly and plugging of the temperature sensor, can realize on-site calibration, is convenient for personnel to operate, and effectively ensures calibration efficiency and accuracy.
[0009] In order to achieve the above purpose, the utility model provides the following technical solutions:
[0010] In the first aspect, the utility model provides a handheld temperature sensor calibrator, comprising an inner tube, a heating element, a heat preservation component, a handheld outer shell and a standard temperature measuring element, wherein the inner tube, the heating element, the heat preservation component and the handheld outer shell are sequentially arranged from the inside to the outside, the heating element is used to heat the inner tube, the standard temperature measuring element is arranged in the inner tube, and an installation cavity for installing a sensor to be calibrated is formed between the end of the standard temperature measuring element and the inner tube.
[0011] Furthermore, the handheld shell includes a handle and an outer sleeve, the outer sleeve is sleeved on the outside of the heat preservation component, and the handle is connected to the outside of the outer sleeve.
[0012] Furthermore, the thermal insulation component comprises at least one thermal insulation layer, and at least one thermal insulation layer is an asbestos layer;
[0013] When the thermal insulation layer is configured as multiple layers, the multiple layers of thermal insulation layers are sequentially arranged from the inside to the outside.
[0014] Furthermore, the heating element comprises a thermistor wire, and the thermistor wire is spirally wound around the outside of the inner tube.
[0015] Furthermore, the standard temperature measuring element is installed at the bottom end of the inner tube, and a heat insulation layer is provided on the side of the standard temperature measuring element away from the installation cavity, and the edge of the heat insulation layer is opposite to the end of the inner tube and the end of the heating element along the axial direction of the inner tube.
[0016] Furthermore, an insertion hole for inserting a mercury thermometer is provided at the bottom end of the handheld housing, and a thermally conductive elastic layer extending between the standard temperature measuring element and the inner tube is provided in the insertion hole, and the thermally conductive elastic layer is used to conduct the heat of the inner tube to the mercury thermometer.
[0017] Furthermore, the thermally conductive elastic layer is ring-shaped.
[0018] Furthermore, the material of the inner tube is copper.
[0019] The utility model also provides a handheld temperature sensor calibration system, comprising the handheld temperature sensor calibrator described in the above solution.
[0020] Furthermore, it also includes a temperature controller, and the standard temperature measuring element and the heating element are both electrically connected to the temperature controller.
[0021] The handheld temperature sensor calibrator and calibration system provided by the utility model can produce the following beneficial effects:
[0022] When using the above-mentioned handheld temperature sensor calibrator, hold the handheld housing, place the temperature sensor to be tested in the installation cavity, start the heating element, and the insulation component plays a role of heat insulation. The standard temperature measuring element detects the heating temperature in real time, which is convenient for personnel to control the heating element to heat at the set temperature. Then compare whether there is a deviation between the value of the temperature sensor to be tested seen on the upper computer and the set temperature value.
[0023] Compared with the prior art, the handheld temperature sensor calibrator provided in the first aspect of the utility model only needs to insert the temperature sensor to be tested into the installation cavity when calibrating the temperature sensor. There is no need to repeatedly disassemble and plug and unplug the temperature sensor. At the same time, on-site calibration can be realized, which is convenient for personnel operation and effectively ensures calibration efficiency and accuracy.
[0024] The handheld temperature sensor calibration system provided in the second aspect of the utility model has the handheld temperature sensor calibrator provided in the first aspect of the utility model, and thus has all the beneficial effects of the handheld temperature sensor calibrator provided in the first aspect of the utility model. BRIEF DESCRIPTION OF THE DRAWINGS
[0025] In order to more clearly illustrate the specific implementation methods of the utility model or the technical solutions in the prior art, the drawings required for use in the specific implementation methods or the description of the prior art will be briefly introduced below. Obviously, the drawings described below are some implementation methods of the utility model. For ordinary technicians in this field, other drawings can be obtained based on these drawings without paying creative work.
[0026] Figure 1 A three-dimensional structural schematic diagram of a handheld temperature sensor calibrator provided in an embodiment of the utility model;
[0027] Figure 2 A cross-sectional view of a handheld temperature sensor calibrator provided by an embodiment of the utility model;
[0028] Figure 3 A cross-sectional view of another handheld temperature sensor calibrator provided by an embodiment of the utility model;
[0029] Figure 4 A temperature control principle block diagram of a handheld temperature sensor calibration system provided in an embodiment of the utility model.
[0030] Icon: 1 - inner tube; 2 - thermistor wire; 3 - insulation layer; 4 - handheld housing; 41 - handle; 42 - outer sleeve; 5 - standard temperature measuring element; 6 - insulation layer; 7 - thermal conductive elastic layer; 8 - temperature controller. DETAILED DESCRIPTION
[0031] The technical solution of the utility model will be described clearly and completely below in conjunction with the accompanying drawings. Obviously, the described embodiments are part of the embodiments of the utility model, not all of the embodiments. Based on the embodiments of the utility model, all other embodiments obtained by ordinary technicians in this field without creative work are within the scope of protection of the utility model.
[0032] In the description of the present invention, it should be noted that the terms "center", "upper", "lower", "left", "right", "vertical", "horizontal", "inner", "outer", etc., indicating the orientation or positional relationship, are based on the orientation or positional relationship shown in the drawings, and are only for the convenience of describing the present invention and simplifying the description, rather than indicating or implying that the device or element referred to must have a specific orientation, be constructed and operated in a specific orientation, and therefore cannot be understood as limiting the present invention. In addition, the terms "first", "second", and "third" are used for descriptive purposes only, and cannot be understood as indicating or implying relative importance.
[0033] In the description of the present invention, it should be noted that, unless otherwise clearly specified and limited, the terms "installation", "connection" and "connection" should be understood in a broad sense, for example, it can be a fixed connection, a detachable connection, or an integral connection; it can be a mechanical connection or an electrical connection; it can be a direct connection, or it can be indirectly connected through an intermediate medium, or it can be the internal communication of two components. For ordinary technicians in this field, the specific meanings of the above terms in the present invention can be understood according to specific circumstances.
[0034] The specific implementation of the present invention is described in detail below in conjunction with the accompanying drawings. It should be understood that the specific implementation described here is only used to illustrate and explain the present invention, and is not used to limit the present invention.
[0035] The first aspect of the present invention provides a handheld temperature sensor calibrator. Figure 1 and Figure 2 As shown, it includes an inner tube 1, a heating element, a heat-insulating component, a handheld shell 4 and a standard temperature measuring element 5. The inner tube 1, the heating element, the heat-insulating component and the handheld shell 4 are sequentially arranged from the inside to the outside. The heating element is used to heat the inner tube 1. The standard temperature measuring element 5 is arranged in the inner tube 1, and an installation cavity for installing the sensor to be calibrated is formed between the end of the standard temperature measuring element 5 and the inner tube 1.
[0036] refer to Figure 2 When the above-mentioned handheld temperature sensor calibrator is in use, a person can hold the handheld housing 4. At the same time, the heat preservation component can play a role in heat preservation and insulation, further reducing the heat transfer to the holding part, thereby avoiding the phenomenon of scalding caused by excessive heating temperature of the heating element. Specifically, the temperature sensor to be detected can be placed in the installation cavity first, and the heating element is started. The inner tube 1 transfers heat to the standard temperature measuring element therein. The standard temperature measuring element can detect the heating temperature of the heating element in real time, which is convenient for the person to control the heating element to heat at the set temperature. After the heating temperature is constant, the value of the temperature sensor to be detected seen on the host computer is compared with the set temperature value to see if there is a deviation.
[0037] When the handheld temperature sensor verifier provided in the above embodiment verifies the temperature sensor, it only needs to insert the temperature sensor to be tested into the installation cavity. There is no need to repeatedly disassemble and plug and unplug the temperature sensor. At the same time, on-site verification can be realized, which is convenient for personnel to operate and safe to operate, and effectively ensures verification efficiency and accuracy.
[0038] The handheld housing 4 is described in detail below:
[0039] In some embodiments, Figure 2 As shown, the handheld housing 4 includes a handle 41 and an outer sleeve 42 . The outer sleeve 42 is sleeved on the outside of the heat preservation component, and the handle 41 is connected to the outside of the outer sleeve 42 .
[0040] The handle 41 connected to the outside of the handheld shell 4 is convenient for people to hold. When the preset heating temperature is high, compared with directly holding the outer holding sleeve 42, holding the handle 41 can further increase the heat transfer path, and the temperature felt by the person is lower.
[0041] The material of the handle 41 may be existing heat-resistant plastic, and the material of the outer sleeve 42 may be stainless steel.
[0042] Specifically, a high temperature warning label may be attached to the outside of the outer sleeve 42 to remind people not to touch the outer sleeve 42 to avoid burns.
[0043] The accuracy of the temperature measured by the standard temperature measuring element 5 is crucial to whether the heating element can be heated at a preset temperature. Therefore, when using the above-mentioned handheld temperature sensor tester, the accuracy of the standard temperature measuring element 5 can be tested regularly.
[0044] In this regard, in some embodiments, such as Figure 3 As shown, the bottom end of the handheld housing 4 is provided with an insertion hole for inserting a mercury thermometer. When the accuracy of the standard temperature measuring element 5 needs to be tested, the mercury thermometer can be inserted into the insertion hole to detect the actual heating temperature through contact with the inner tube 1.
[0045] Specifically, Figure 3 As shown, a heat-conductive elastic layer 7 extending between the standard temperature measuring element 5 and the inner tube 1 may be provided in the insertion hole. The heat-conductive elastic layer 7 is used to conduct the heat of the inner tube 1 to the mercury thermometer, so that the mercury thermometer can contact the heat source more directly, thereby improving the detection accuracy.
[0046] The elasticity of the thermally conductive elastic layer 7 can give a certain squeezing force to the mercury thermometer, so that it fits the mercury thermometer better and guides the heat of the inner tube 1 to the mercury thermometer more stably.
[0047] The thermally conductive elastic layer 7 may be made of a variety of materials, such as liquid silicone rubber with a thermally conductive substance, the thermally conductive substance may be aluminum oxide, zinc oxide, etc. The material of the thermally conductive elastic layer 7 may be obtained by the prior art, and will not be described in detail.
[0048] In some embodiments, the thermally conductive elastic layer 7 is annular. When in use, the mercury thermometer can directly pass through the thermally conductive elastic layer 7, which is squeezed between the standard temperature measuring element 5 and the inner tube 1 to conduct the heat of the inner tube 1 to the mercury thermometer.
[0049] The following is a specific description of the insulation components:
[0050] In some embodiments, the heat preservation component may include at least one heat preservation layer 3, which can reduce the heat transfer from the heating element to the handheld housing 4, thereby effectively reducing the possibility of burns to personnel.
[0051] Among them, at least one insulation layer 3 is an asbestos layer. Asbestos has the characteristics of insulation and fire resistance, and is a better insulation material.
[0052] When the thermal insulation component includes multiple thermal insulation layers 3, the multiple thermal insulation layers 3 are sequentially arranged from the inside to the outside, and the material of each thermal insulation layer 3 can be different, so as to enhance the thermal insulation effect and reduce the heat transfer.
[0053] The heating element is described in detail below:
[0054] It should be noted that the heating element can adopt various structural forms, for example, the heating element includes a thermistor wire 2, or the heating element includes a carbon fiber heating sheet, and so on.
[0055] In some embodiments, Figure 2 As shown, the heating element includes a thermistor wire 2, which can be spirally wound around the outside of the inner tube 1 to uniformly heat the inner tube 1.
[0056] Of course, in some other embodiments, the thermistor wire 2 may also be distributed outside the inner tube 1 in a serpentine shape or the like.
[0057] The standard temperature measuring element 5 is specifically described below:
[0058] In some embodiments, the standard temperature measuring element 5 may be an externally purchased resistance temperature detector.
[0059] In some embodiments, Figure 2 As shown, the standard temperature measuring element 5 can be installed at the bottom end of the inner tube 1, and an installation cavity for installing the sensor to be calibrated is formed between the top end of the standard temperature measuring element 5 and the inner wall of the inner tube 1.
[0060] In some embodiments, Figure 2As shown, in order to prevent the bottom of the handheld housing 4 from being overheated during the calibration process, a heat insulation layer 6 can be provided on the side of the standard temperature measuring element 5 facing away from the installation cavity, and the edge of the heat insulation layer 6 is opposite to the end of the inner tube 1 and the end of the heating element along the axial direction of the inner tube 1.
[0061] The provision of the heat insulation layer can prevent the heat of the inner tube 1 and the heating element from being transferred to the bottom end of the handheld housing 4, thereby further preventing people from being scalded.
[0062] Specifically, Figure 2 As shown, the edge of the thermal insulation layer 6 abuts against the inner surface of the thermal insulation layer 3, so that a detection cavity can be formed between the thermal insulation layer 6 and the thermal insulation layer 3, and a heating element, an inner tube 1 and a standard temperature measuring element 5 are placed in the detection cavity from the outside to the inside.
[0063] The inner tube 1 is specifically described below:
[0064] In some embodiments, the material of the inner tube 1 is copper, which has good thermal conductivity and can quickly transfer the heat on the heating element to the standard temperature measuring element 5 and the temperature sensor to be measured.
[0065] The embodiment of the second aspect of the present utility model provides a handheld temperature sensor calibration system. The handheld temperature sensor calibration system provided by the embodiment of the second aspect of the present utility model includes the above-mentioned handheld temperature sensor calibrator.
[0066] The handheld temperature sensor calibration system provided in the second aspect of the utility model has the handheld temperature sensor calibrator provided in the embodiment of the first aspect of the utility model, and thus has all the beneficial effects of the handheld temperature sensor calibrator provided in the embodiment of the first aspect of the utility model.
[0067] In an optional embodiment, if Figure 4 As shown, the above-mentioned handheld temperature sensor calibration system also includes a temperature controller 8, and the temperature controller 8 is electrically connected to the standard temperature measuring element 5 and the heating element.
[0068] Before calibration, the heating element and the standard temperature measuring element 5 are connected to the thermostat 8 with matching wires. The thermostat 8 can set the heating temperature and display the heating temperature. When in use, a heating value, such as 50°C, is input on the thermostat 8. The thermostat 8 controls the heating element to heat the inner tube 1. The standard temperature measuring element 5 detects the heating temperature in real time and feeds it back to the thermostat 8. When the temperature is reached, the thermostat 8 controls the heating element to stop heating, and cooperates with the standard temperature measuring element 5 to intermittently control the heating element to turn on and off, so as to maintain the constant temperature of the inner tube 1.
[0069] The temperature sensor calibration system is powered by AC 220V, 50HZ, and the temperature controller 8 can be directly purchased from outside.
[0070] The handheld temperature sensor calibration system provided in the above embodiment is provided with a temperature controller, and the heating power of the heating element can be adjusted in real time through the cooperation of the temperature controller and the standard temperature measuring element, so that the heating element is heated at a preset temperature to ensure detection accuracy and efficiency.
[0071] Finally, it should be noted that the above embodiments are only used to illustrate the technical solution of the utility model, rather than to limit it. Although the utility model has been described in detail with reference to the aforementioned embodiments, ordinary technicians in this field should understand that they can still modify the technical solutions recorded in the aforementioned embodiments, or replace some or all of the technical features therein with equivalents. However, these modifications or replacements do not make the essence of the corresponding technical solution deviate from the scope of the technical solution of the embodiments of the utility model.
Claims
1. A handheld temperature sensor calibrator, characterized in that: The invention comprises an inner tube (1), a heating element, a heat-insulating component, a hand-held outer shell (4) and a standard temperature measuring element (5), wherein the inner tube (1), the heating element, the heat-insulating component and the hand-held outer shell (4) are sequentially arranged from the inside to the outside, the heating element is used to heat the inner tube (1), the standard temperature measuring element (5) is arranged in the inner tube (1), and an installation cavity for installing a sensor to be calibrated is formed between the end of the standard temperature measuring element (5) and the inner tube (1).
2. The handheld temperature sensor calibrator according to claim 1, characterized in that: The handheld housing (4) comprises a handle (41) and an outer sleeve (42); the outer sleeve (42) is sleeved on the outside of the heat preservation component; and the handle (41) is connected to the outside of the outer sleeve (42).
3. The handheld temperature sensor calibrator according to claim 1, characterized in that: The thermal insulation component comprises at least one thermal insulation layer (3), and at least one thermal insulation layer (3) is an asbestos layer; When the thermal insulation layer (3) is configured as multiple layers, the multiple layers of the thermal insulation layer (3) are sequentially arranged from the inside to the outside.
4. The handheld temperature sensor calibrator according to claim 1, characterized in that: The heating element comprises a thermistor wire (2), and the thermistor wire (2) is spirally wound around the outside of the inner tube (1).
5. The handheld temperature sensor calibrator according to claim 1, characterized in that: The standard temperature measuring element (5) is installed at the bottom end of the inner tube (1), and a heat insulation layer (6) is provided on the side of the standard temperature measuring element (5) facing away from the installation cavity, and the edge of the heat insulation layer (6) is directly opposite to the end of the inner tube (1) and the end of the heating element along the axial direction of the inner tube (1).
6. The handheld temperature sensor calibrator according to claim 5, characterized in that: The bottom end of the handheld housing (4) is provided with an insertion hole for inserting a mercury thermometer, and a heat-conducting elastic layer (7) extending between the standard temperature measuring element (5) and the inner tube (1) is provided in the insertion hole, and the heat-conducting elastic layer (7) is used to conduct the heat of the inner tube (1) to the mercury thermometer.
7. The handheld temperature sensor calibrator according to claim 6, characterized in that: The thermally conductive elastic layer (7) is ring-shaped.
8. The handheld temperature sensor calibrator according to any one of claims 1 to 7, characterized in that: The material of the inner tube (1) is copper.
9. A handheld temperature sensor calibration system, characterized in that: The invention comprises the handheld temperature sensor calibrator as described in any one of claims 1 to 8.
10. The handheld temperature sensor calibration system according to claim 9, characterized in that: It also includes a temperature controller (8), and the standard temperature measuring element (5) and the heating element are both electrically connected to the temperature controller (8).