A thermistor stability detection device and detection method thereof
By designing a thermistor stability detection device including an embedded central positioning mechanism, a lead positioning mechanism, a flip mechanism and an adjustment mechanism, the problem of uneven heat receiving of the penetrating thermistor in the heat resistance test is solved, and higher accuracy of test results and lower cost of use are achieved.
Patent Information
- Application Number
- CN202411979361.5
- Authority / Receiving Office
- CN · China
- Patent Type
- Applications(China)
- Current Assignee / Owner
- Filing Date
- 2024-12-31
- Publication Date
- 2025-04-08
AI Technical Summary
When conducting heat resistance tests on multiple passivation thermistors, fixing needs to contact the passivation thermistor through a clamp, resulting in the temperature of the contact position between the passivation thermistor and the contact between the passivation thermistor and the other positions during the test, which affects the accuracy of the test results.
A thermistor stability detection device is designed, including a constant temperature box, a sealed top plate and a digital display. It adopts an embedded central positioning mechanism, a lead positioning mechanism, a flip mechanism and an adjustment mechanism to ensure that the penetrating thermistor can rotate automatically during the test, avoiding uneven heat from a single position, and stably limit and connect the leads through the positioning mechanism.
Through automatic rotation and stable positioning, the uniformity of heat received during the test of the penetrating thermistor is improved, the accuracy of the test results is enhanced, and the maintenance and repair process of the equipment is simplified, thereby reducing the actual use cost.
Smart Images
Figure CN119779517A_ABST
Abstract
Description
Technical Field
[0001] The invention relates to the technical field of thermistors, and in particular to a thermistor stability detection device and a detection method thereof. Background Art
[0002] Thermistor stability test device is a device specially used to evaluate the performance stability of thermistors under different conditions. This device simulates the actual working environment to test thermistors in terms of temperature, humidity, long-term stability, etc. to ensure their reliability in various applications. In actual use, problems that may be encountered include insufficient temperature control accuracy, humidity influence, equipment fatigue in long-term stability testing, accuracy of data collection and analysis, insufficient environmental adaptability, complexity of equipment calibration, and standardization of test methods. In order to solve these problems, it is necessary to adopt high-precision constant temperature baths and temperature sensors, constant humidity chambers, durable materials and structural designs, high-precision data collectors and advanced data analysis software, test systems that simulate different environmental conditions, perfect calibration processes and standards, and unified test methods and standards. These measures help to improve the accuracy and reliability of thermistor stability testing and ensure its stable operation in various environments; In the process of conducting heat resistance test on through-type thermistors, especially multiple through-type thermistors, it is necessary to fix the multiple through-type thermistors. The fixation requires contact with the through-type thermistors through a clamp, which leads to the temperature of the contact position of the through-type thermistor and the temperature of other positions being different during the test, affecting the accuracy of the test result. Therefore, a thermistor stability detection device and a detection method thereof are proposed to address the above problems. Summary of the invention
[0003] The object of the present invention is to provide a thermistor stability detection device and a detection method thereof, so as to solve the problem that in the process of performing heat resistance test on multiple through-type thermistors, multiple through-type thermistors need to be fixed, and the fixing needs to be in contact with the through-type thermistors through a clamp, which leads to the temperature of the contact position of the through-type thermistors during the test being different from the temperature of other positions, thereby affecting the accuracy of the test results.
[0004] To achieve the above object, the present invention provides the following technical solutions: A thermistor stability detection device and detection method thereof, comprising a thermostat, a sealed top plate and a digital display, wherein an embedded center positioning mechanism is installed in the middle of the upper end of the thermostat, lead positioning mechanisms are fixedly connected to both sides of the center positioning mechanism, through-type thermistors are placed on the upper ends of the lead positioning mechanism and the center positioning mechanism, an adjustment mechanism is installed on the side of the center positioning mechanism, a top positioning mechanism is installed on the top of the center positioning mechanism, the upper end of the top positioning mechanism is fixedly connected to the sealed top plate, and the upper end of the sealed top plate is fixedly connected to the digital display; the lead positioning mechanism comprises a positioning plate, and a plurality of jacks are provided on the upper end of the positioning plate. , both sides of the upper end of the positioning plate are fixedly connected with pins, and both sides of the side of the positioning plate are fixedly connected with connecting pieces; the center positioning mechanism includes a horizontal plate, and the upper end of the horizontal plate is fixedly connected with a plurality of first elastic positioning seats, a threaded hole is opened in the middle of the top of the horizontal plate, a sliding groove is opened on the side of the horizontal plate, and a flip mechanism is installed in the middle of the upper end of the horizontal plate; the top positioning mechanism includes a positioning frame, the bottom end of the positioning frame is fixedly connected with an insert block, and the four corners of the lower end of the positioning frame are opened with pin holes; the adjusting mechanism includes an adjusting frame, the upper end of the adjusting frame is fixedly connected with a plurality of second elastic positioning seats, and one end of the adjusting frame is rotatably connected to the inner side with a threaded rod.
[0005] As a further optimization of the present invention, the flipping mechanism includes an annular belt, the inner sides of both ends of the annular belt are rotatably connected to positioning rollers, the lower inner side of the annular belt is fixedly connected to a plurality of teeth, the upper ends of the teeth are meshed with a tooth plate, and both sides of one end of the tooth plate are fixedly connected to heat expansion rods.
[0006] As a further optimization of the present invention, the flipping mechanism is arranged on the lower side of the first elastic positioning seat, the outside of the annular belt is provided with anti-slip grooves, two thermal expansion rods are provided, the fixed end of the thermal expansion rod is fixedly connected to the inside of the horizontal plate, the positioning roller is rotatably connected to the inside of the horizontal plate, and the upper end of the annular belt is tightly attached to the through-type thermistor.
[0007] As a further optimization of the present invention, there are two lead positioning mechanisms, which are parallel to each other, there are four latches in total, the upper edge of the latches is arc-shaped, there is a one-to-one correspondence between the latches and the pin holes, there is a one-to-one correspondence between the sockets and the plug blocks, and the connecting piece is slidably connected to the adjustment frame.
[0008] As a further optimization of the present invention, the horizontal plate is spirally connected to the threaded rod through a threaded hole, the horizontal plate is slidingly connected to the adjustment frame through a sliding groove, and the heights of the first elastic positioning seat and the second elastic positioning seat are equal.
[0009] As a further optimization of the present invention, the top positioning mechanism, the sealing top plate and the center point of the constant temperature box are arranged in the same vertical plane, and the top positioning mechanism is connected to the positioning plate through an insert block, a pin hole, a socket and a pin.
[0010] As a further optimization of the present invention, the positioning frame is set in a "mouth" shape, a V-shaped opening is opened in the middle of the plug block, and the plug block is set at the upper ends of the leads at both ends of the through-type thermistor.
[0011] As a further optimization of the present invention, the adjustment frame is U-shaped, the second elastic positioning seat is slidably connected to the upper end surface of the annular belt, and the center points of the adjustment mechanism and the center positioning mechanism are arranged in the same horizontal plane.
[0012] As a further optimization of the present invention, there are multiple digital displays, and the pins at both ends of the digital display pass through the sealing top plate and the positioning frame and are exposed in the middle of the upper end of the plug block. There is a one-to-one correspondence between the digital display and the through-type thermistor placed on the upper end of the cross plate.
[0013] As a further optimized content of the present invention, the following steps are included: Step 1: Positioning the middle of the through-type thermistor: placing the through-type thermistor on the upper end of the horizontal plate, positioning and separating the through-type thermistor through the first elastic positioning seat and the second elastic positioning seat, and during the placement process, pre-positioning the leads arranged at both ends of the through-type thermistor synchronously through the positioning plates arranged on both sides; Step 2: Fix the middle of the through-type thermistor: After placing multiple through-type thermistors, the staff rotates the threaded rod to adjust the position of the adjustment frame. During the movement of the adjustment frame, the multiple second elastic positioning seats are driven to move synchronously, and the through-type thermistor is fixed in cooperation with the first elastic positioning seat. The through-type thermistor fixed between the first elastic positioning seat and the second elastic positioning seat can rotate between the first elastic positioning seat and the second elastic positioning seat; Step 3: Position the leads at both ends of the through-type thermistor: Connect the positioning frame with the positioning plate. The connection and positioning are achieved by connecting the plug block with the jack and the plug pin with the pin hole. During the connection process, the plug block positions the bent leads at both ends of the through-type thermistor through the V-shaped groove in the middle. At the same time, the leads at both ends of the through-type thermistor are electrically connected to the digital display. Step 4: Conduct constant temperature test on the through-type thermistor at different temperatures: Finally, the through-type thermistor after positioning is embedded into the constant temperature box, ready for testing. The sealed top plate is used for sealing and heat insulation during the constant temperature test. During the test, the constant temperature box is controlled to maintain different temperatures for a period of time, and the test results are recorded through the digital display during the test at different temperatures; During the test, the thermal expansion rod pushes the tooth plate to move horizontally as it expands due to heat at different temperatures. During the movement of the tooth plate, the annular belt is controlled to rotate through the teeth, thereby driving the through-type thermistor to rotate, so as to ensure that the contact position of the through-type thermistor with the first elastic positioning seat, the second elastic positioning seat and the annular belt changes during the test.
[0014] Compared with the prior art, the present invention has the following beneficial effects: 1. In the present invention, by setting a central positioning mechanism, during the heat resistance test of the through-type thermistor, the through-type thermistor can be automatically controlled to rotate according to the temperature, thereby preventing the through-type thermistor from contacting with the fixture at a single position, causing the through-type thermistor to be heated unevenly as a whole, affecting the accuracy of the test results, and further improving the accuracy of the test results; 2. In the present invention, the lead wires arranged at both ends of the through-type thermistor can be stably limited by the lead wire positioning mechanism and the top positioning mechanism, and the lead wires at both ends of the through-type thermistor can be connected to the corresponding digital display device, and the test vertical display of multiple through-type thermistors can be synchronously displayed in real time, which is convenient for recording the test results; 3. In the present invention, the device as a whole adopts a modular design, allowing each module to be customized and upgraded according to specific needs, simplifying the maintenance and repair process, and supporting standardized production and inventory management, which can effectively reduce the cost-effectiveness in actual use. BRIEF DESCRIPTION OF THE DRAWINGS
[0015] Figure 1 It is a schematic diagram of the overall structure of the present invention; Figure 2 For the present invention Figure 1 Schematic diagram of the structure at A in the middle; Figure 3 This is a schematic diagram of the structure of the center positioning mechanism of the present invention; Figure 4 It is a schematic diagram of the structure of the flipping mechanism of the present invention; Figure 5 For the present invention Figure 4 Schematic diagram of the structure at B in the middle; Figure 6 This is a schematic diagram of the installation position structure of the heat expansion rod of the present invention; Figure 7 This is a schematic diagram of the top positioning mechanism structure of the present invention; Figure 8 It is a schematic diagram of the structure of the regulating mechanism of the present invention.
[0016] In the figure: 1. Constant temperature box; 2. Through-type thermistor; 3. Lead wire positioning mechanism; 31. Positioning plate; 32. Socket; 33. Pin; 34. Connector; 4. Center positioning mechanism; 41. Horizontal plate; 42. First elastic positioning seat; 43. Threaded hole; 44. Slide groove; 45. Turning mechanism; 451. Annular belt; 452. Positioning roller; 453. Tooth; 454. Tooth plate; 455. Thermal expansion rod; 5. Top positioning mechanism; 51. Positioning frame; 52. Insert block; 53. Pin hole; 6. Sealed top plate; 7. Digital display; 8. Adjustment mechanism; 81. Adjustment frame; 82. Second elastic positioning seat; 83. Threaded rod. DETAILED DESCRIPTION
[0017] See also Figure 1-8 , the present invention provides a technical solution: A thermistor stability detection device and a detection method thereof, comprising a thermostat 1, a sealed top plate 6 and a digital display 7, an embedded center positioning mechanism 4 is installed in the middle of the upper end of the thermostat 1, lead positioning mechanisms 3 are fixedly connected to both sides of the center positioning mechanism 4, a through-type thermistor 2 is placed on the upper ends of the lead positioning mechanism 3 and the center positioning mechanism 4, an adjustment mechanism 8 is installed on the side of the center positioning mechanism 4, a top positioning mechanism 5 is installed on the top of the center positioning mechanism 4, the upper end of the top positioning mechanism 5 is fixedly connected to the sealed top plate 6, and the upper end of the sealed top plate 6 is fixedly connected to the digital display 7; the lead positioning mechanism 3 includes a positioning plate 31, a plurality of jacks 32 are opened on the upper end of the positioning plate 31, and a plurality of jacks 32 are opened on the upper end of the positioning plate 31. Both sides are fixedly connected with latches 33, and both sides of the side of the positioning plate 31 are fixedly connected with connecting pieces 34; the center positioning mechanism 4 includes a horizontal plate 41, and a plurality of first elastic positioning seats 42 are fixedly connected to the upper end of the horizontal plate 41, a threaded hole 43 is opened in the middle of the top of the horizontal plate 41, a slide groove 44 is opened on the side of the horizontal plate 41, and a flip mechanism 45 is installed in the middle of the upper end of the horizontal plate 41; the top positioning mechanism 5 includes a positioning frame 51, and the bottom end of the positioning frame 51 is fixedly connected with an insert block 52, and the four corners of the lower end of the positioning frame 51 are opened with pin holes 53; the adjustment mechanism 8 includes an adjustment frame 81, and the upper end of the adjustment frame 81 is fixedly connected with a plurality of second elastic positioning seats 82, and one end of the adjustment frame 81 is rotatably connected to the inner side with a threaded rod 83.
[0018] As a technical solution for further implementation of the present invention, the flip mechanism 45 includes an annular belt 451, the inner sides of both ends of the annular belt 451 are rotatably connected to positioning rollers 452, a plurality of teeth 453 are fixedly connected to the inner lower side of the annular belt 451, the upper ends of the teeth 453 are meshed with the tooth plate 454, and both sides of one end of the tooth plate 454 are fixedly connected to thermal expansion rods 455. Through the above arrangement, the through-type thermistor 2 can be controlled to rotate during the test of the through-type thermistor 2, thereby effectively improving the uniformity of heating during the test of the through-type thermistor 2. As a technical solution for further implementation of this scheme, the flip mechanism 45 is arranged at the lower side of the first elastic positioning seat 42, the outer side of the annular belt 451 is provided with anti-slip grooves, two thermal expansion rods 455 are provided, the fixed end of the thermal expansion rod 455 is fixedly connected to the inside of the horizontal plate 41, the positioning roller 452 is rotatably connected to the inside of the horizontal plate 41, and the upper end of the annular belt 451 is in close contact with the through-type thermistor 2. Through the above arrangement, the stability of the annular belt 451 in the process of driving the through-type thermistor 2 to rotate can be improved; As a technical solution for further implementation of this scheme, two lead positioning mechanisms 3 are provided, the lead positioning mechanisms 3 are parallel to each other, a total of four plugs 33 are provided, the upper edge of the plug 33 is arc-shaped, the plug 33 and the pin hole 53 correspond one to one, the plug hole 32 and the plug block 52 correspond one to one, and the connecting member 34 is slidably connected to the adjustment frame 81. Through the above arrangement, the leads provided at both ends of the through-type thermistor 2 can be stably positioned; As a further technical solution of the present invention, the horizontal plate 41 is spirally connected to the threaded rod 83 through the threaded hole 43, and the horizontal plate 41 is slidably connected to the adjustment frame 81 through the slide groove 44. The heights of the first elastic positioning seat 42 and the second elastic positioning seat 82 are equal. Through the above arrangement, the stability of the first elastic positioning seat 42 and the second elastic positioning seat 82 during the position adjustment process can be improved; As a technical solution further implemented in this scheme, the top positioning mechanism 5, the sealing top plate 6, and the center point of the thermostatic box 1 are arranged on the same vertical plane, and the top positioning mechanism 5 is connected to the positioning plate 31 through the plug block 52, the pin hole 53, the plug hole 32, and the plug pin 33. Through the above arrangement, the stability of the overall operation of the equipment can be further improved; As a technical solution for further implementing the present invention, the positioning frame 51 is set in a "mouth" shape, a V-shaped mouth is opened in the middle of the plug block 52, and the plug block 52 is set at the upper end of the lead wires at both ends of the through-type thermistor 2. Through the above arrangement, the lead wires at both ends of the through-type thermistor 2 can be stably connected to the digital display 7; As a technical solution for further implementation of this scheme, the adjustment frame 81 is U-shaped, the second elastic positioning seat 82 is slidably connected to the upper end surface of the annular belt 451, and the center points of the adjustment mechanism 8 and the center positioning mechanism 4 are arranged on the same horizontal plane. Through the above arrangement, through-type thermistors 2 of different diameters can be positioned; As a technical solution for further implementing the present invention, a plurality of digital displays 7 are provided, and the pins at both ends of the digital display 7 pass through the sealing top plate 6 and the positioning frame 51 and are exposed in the middle of the upper end of the plug block 52. The digital display 7 corresponds to the through-type thermistor 2 placed on the upper end of the horizontal plate 41 one by one. Through the above arrangement, the measured values of multiple through-type thermistors 2 can be displayed in real time at the same time. As a technical solution for further implementation of this scheme, the following steps are included: Step 1: Positioning the middle of the through-type thermistor 2: placing the through-type thermistor 2 on the upper end of the horizontal plate 41, positioning and separating it through the first elastic positioning seat 42 and the second elastic positioning seat 82, and during the placement process, pre-positioning the leads set at both ends of the through-type thermistor 2 synchronously through the positioning plates 31 set on both sides; Step 2: Fix the through-type thermistor 2 in the middle: After placing multiple through-type thermistors 2, the staff rotates the threaded rod 83 to adjust the position of the adjustment frame 81. During the movement of the adjustment frame 81, the multiple second elastic positioning seats 82 are driven to move synchronously, and the through-type thermistor 2 is fixed in cooperation with the first elastic positioning seat 42 and the second elastic positioning seat 82. The through-type thermistor 2 fixed between the first elastic positioning seat 42 and the second elastic positioning seat 82 can rotate between the first elastic positioning seat 42 and the second elastic positioning seat 82; Step 3: Positioning the leads at both ends of the through-type thermistor 2: Connect the positioning frame 51 with the positioning plate 31, and the connection and positioning are achieved by connecting the plug block 52 with the plug hole 32 and the plug pin 33 with the pin hole 53. During the connection process, the plug block 52 positions the leads bent at both ends of the through-type thermistor 2 through the V-shaped groove in the middle, and at the same time, the leads set at both ends of the through-type thermistor 2 are electrically connected to the digital display 7; Step 4: Perform constant temperature test on the through-type thermistor 2 at different temperatures: Finally, the through-type thermistor 2 after positioning is embedded into the constant temperature box 1, ready for testing. The sealing top plate 6 is used for sealing and heat insulation during the constant temperature test. During the test, the constant temperature box 1 is controlled to maintain different temperatures for a period of time, and the test results are recorded through the digital display 7 during the test at different temperatures; During the test, the thermal expansion rod 455 pushes the tooth plate 454 to move horizontally during the process of thermal expansion at different temperatures. During the movement of the tooth plate 454, the annular belt 451 is controlled to rotate through the teeth 453, thereby driving the through-type thermistor 2 to rotate, so as to ensure that the contact position of the through-type thermistor 2 with the first elastic positioning seat 42, the second elastic positioning seat 82 and the annular belt 451 changes during the test.
[0019] This article uses specific examples to illustrate the principles and implementation methods of the present invention. The above examples are only used to help understand the method and core ideas of the present invention. The above is only a preferred implementation of the present invention. It should be pointed out that due to the limitations of textual expression and the objective existence of infinite specific structures, ordinary technicians in this technical field can make several improvements, modifications or changes without departing from the principles of the present invention, and can also combine the above technical features in an appropriate manner; these improvements, modifications, changes or combinations, or the direct application of the inventive concept and technical solution to other occasions without improvement, should be regarded as the protection scope of the present invention.
Claims
1. A thermistor stability detection device, comprising a constant temperature box (1), a sealed top plate (6) and a digital display (7), characterized in that: An embedded center positioning mechanism (4) is installed in the middle of the upper end of the thermostatic box (1), and lead positioning mechanisms (3) are fixedly connected to both sides of the center positioning mechanism (4). A through-type thermistor (2) is placed on the upper ends of the lead positioning mechanism (3) and the center positioning mechanism (4). An adjustment mechanism (8) is installed on the side of the center positioning mechanism (4). A top positioning mechanism (5) is installed on the top of the center positioning mechanism (4). The upper end of the top positioning mechanism (5) is fixedly connected to a sealed top plate (6), and the upper end of the sealed top plate (6) is fixedly connected to a digital display (7); The lead wire positioning mechanism (3) comprises a positioning plate (31), a plurality of insertion holes (32) are provided at the upper end of the positioning plate (31), both sides of the upper end of the positioning plate (31) are fixedly connected with plug pins (33), and both sides of the side of the positioning plate (31) are fixedly connected with connecting pieces (34); The center positioning mechanism (4) comprises a horizontal plate (41), a plurality of first elastic positioning seats (42) are fixedly connected to the upper end of the horizontal plate (41), a threaded hole (43) is provided in the middle of the top end of the horizontal plate (41), a sliding groove (44) is provided on the side of the horizontal plate (41), and a turning mechanism (45) is installed in the middle of the upper end of the horizontal plate (41); The top positioning mechanism (5) comprises a positioning frame (51), the bottom end of the positioning frame (51) is fixedly connected to an insert block (52), and the four corners of the lower end of the positioning frame (51) are provided with pin holes (53); The adjustment mechanism (8) comprises an adjustment frame (81), a plurality of second elastic positioning seats (82) being fixedly connected to the upper end of the adjustment frame (81), and a threaded rod (83) being rotatably connected to the inner side of one end of the adjustment frame (81).
2. A thermistor stability detection device according to claim 1, characterized in that: The turning mechanism (45) comprises an annular belt (451), the inner sides of both ends of the annular belt (451) are rotatably connected to positioning rollers (452), a plurality of teeth (453) are fixedly connected to the lower inner side of the annular belt (451), the upper ends of the teeth (453) are meshed with a tooth plate (454), and both sides of one end of the tooth plate (454) are fixedly connected to heat expansion rods (455).
3. A thermistor stability detection device according to claim 2, characterized in that: The flip mechanism (45) is arranged at the lower side of the first elastic positioning seat (42); the outer side of the annular belt (451) is provided with anti-slip grooves; two thermal expansion rods (455) are provided; the fixed ends of the thermal expansion rods (455) are fixedly connected to the inside of the horizontal plate (41); the positioning roller (452) is rotatably connected to the inside of the horizontal plate (41); and the upper end of the annular belt (451) is in close contact with the through-type thermistor (2).
4. A thermistor stability detection device according to claim 1, characterized in that: The lead wire positioning mechanisms (3) are provided with two, the lead wire positioning mechanisms (3) are parallel to each other, the latch pins (33) are provided with four in total, the upper edge of the latch pins (33) is arc-shaped, the latch pins (33) correspond to the pin holes (53) in a one-to-one manner, the insertion holes (32) correspond to the insertion blocks (52) in a one-to-one manner, and the connecting member (34) is slidably connected to the adjustment frame (81).
5. A thermistor stability detection device according to claim 1, characterized in that: The transverse plate (41) is spirally connected to the threaded rod (83) via the threaded hole (43), the transverse plate (41) is slidably connected to the adjustment frame (81) via the sliding groove (44), and the first elastic positioning seat (42) and the second elastic positioning seat (82) are of equal height.
6. A thermistor stability detection device according to claim 1, characterized in that: The top positioning mechanism (5), the sealing top plate (6), and the center point of the thermostatic box (1) are arranged on the same vertical plane, and the top positioning mechanism (5) is connected to the positioning plate (31) via an insert block (52), a pin hole (53), a plug hole (32), and a plug pin (33).
7. A thermistor stability detection device according to claim 1, characterized in that: The positioning frame (51) is arranged in a "mouth" shape, a V-shaped opening is provided in the middle of the insert block (52), and the insert block (52) is arranged at the upper ends of the leads at both ends of the through-type thermistor (2).
8. A thermistor stability detection device according to claim 1, characterized in that: The adjustment frame (81) is U-shaped, the second elastic positioning seat (82) is slidably connected to the upper end surface of the annular belt (451), and the center points of the adjustment mechanism (8) and the center positioning mechanism (4) are arranged on the same horizontal plane.
9. A thermistor stability detection device according to claim 1, characterized in that: There are a plurality of digital displays (7), and pins at both ends of the digital display (7) pass through the sealing top plate (6) and the positioning frame (51) to be exposed in the middle of the upper end of the plug block (52). The digital display (7) corresponds one to one with the through-type thermistor (2) placed on the upper end of the horizontal plate (41).
10. A detection method for a thermistor stability detection device according to any one of claims 1 to 9, characterized in that: The method comprises the following steps: Step 1: positioning the middle of the through-type thermistor (2): placing the through-type thermistor (2) on the upper end of the horizontal plate (41), positioning and separating the through-type thermistor (2) by means of a first elastic positioning seat (42) and a second elastic positioning seat (82), and during the placement process, pre-positioning the leads arranged at both ends of the through-type thermistor (2) by means of positioning plates (31) arranged on both sides; Step 2: Fixing the through-type thermistor (2) in the middle: After placing a plurality of through-type thermistors (2), the staff rotates the threaded rod (83) to adjust the position of the adjustment frame (81). During the movement of the adjustment frame (81), the plurality of second elastic positioning seats (82) are driven to move synchronously, and the through-type thermistors (2) are fixed in cooperation with the first elastic positioning seat (42) and the second elastic positioning seat (82). The through-type thermistor (2) fixed between the first elastic positioning seat (42) and the second elastic positioning seat (82) can rotate between the first elastic positioning seat (42) and the second elastic positioning seat (82); Step 3: Positioning the leads at both ends of the through-type thermistor (2): Connecting the positioning frame (51) to the positioning plate (31), the connection and positioning are achieved by connecting the plug block (52) to the plug hole (32), and connecting the plug pin (33) to the pin hole (53). During the connection process, the plug block (52) positions the leads bent at both ends of the through-type thermistor (2) through the V-shaped groove provided in the middle, and at the same time, the leads provided at both ends of the through-type thermistor (2) are electrically connected to the digital display (7); Step 4: Perform a constant temperature test on the through-type thermistor (2) at different temperatures: Finally, the through-type thermistor (2) after positioning is embedded into the constant temperature box (1) to prepare for the test. The sealing top plate (6) is used for sealing and heat insulation during the constant temperature test. During the test, the constant temperature box (1) is controlled to maintain different temperatures for a period of time, and the test results are recorded through the digital display (7) during the test at different temperatures. Furthermore, during the test, the heat expansion rod (455) pushes the tooth plate (454) to move horizontally during the process of thermal expansion at different temperatures. During the movement of the tooth plate (454), the teeth (453) control the annular belt (451) to rotate, thereby driving the through-type thermistor (2) to rotate, so as to ensure that the contact position of the through-type thermistor (2) with the first elastic positioning seat (42), the second elastic positioning seat (82) and the annular belt (451) changes during the test.