Clamping jig and test system

Abstract

The invention relates to a clamping jig and a test system, and the clamping jig comprises a fixing mechanism which comprises a first fixing seat and a second fixing seat which are arranged at an interval; the conductive unit comprises two conductive columns, and the two conductive columns are arranged in a spaced mode and jointly connected between the first fixing base and the second fixing base in a matched mode; wherein a fixing gap used for limiting the heating body is formed between the end part of one end of each conductive column and the second fixing seat, and the conductive units are used for measuring the resistance value of the heating body. According to the clamping jig, the heating body is limited in the fixing gap jointly formed by the conductive column and the second fixing base, the conductive column is in direct contact with the heating body while fixing the heating body so as to measure the resistance value of the heating body, and therefore the contact stability of the heating body and the conductive column in the testing process is guaranteed while effective fixing of the heating body is achieved, and the testing efficiency is improved. And the test accuracy is improved.

Description

Technical Field

[0001] This application relates to the technical field of atomization, and particularly to a clamping fixture and a testing system. Background Art

[0002] An atomization device refers to a device that forms an aerosol by heating and other means for the stored atomization medium. Some atomization devices energize a heating element to increase the temperature of the heating element, thereby heating an aerosol generation matrix to atomize the aerosol generation matrix to generate an aerosol. Therefore, the control of the temperature of the heating element is a key factor affecting the quality of the aerosol.

[0003] To accurately control the temperature of the heating element, it is necessary to determine the resistance temperature coefficient of the heating element. Generally, the measurement and calculation methods of the resistance temperature coefficient are as follows: TCR = (R2 - R1) / (R1) / (T2 - T1) = (R2–R1) / (R1*ΔT), where TCR is the resistance temperature coefficient of the heating element, T1 is the initial temperature value, T2 is the preset temperature value, R1 is the resistance value at the initial temperature, and R2 is the resistance value after heating up to the preset high temperature. By measuring the resistance values of the heating element at different temperatures and then substituting them into the above formula, the corresponding resistance temperature coefficient of the heating element can be calculated.

[0004] However, currently, due to structural defects in the existing measuring devices for the resistance temperature coefficient of the heating element, it is difficult to effectively fix the heating element, resulting in poor accuracy in measuring the resistance temperature coefficient, and thus being unfavorable for the temperature control of the heating element. Summary of the Invention

[0005] Based on this, in view of the problem that the measuring device for the resistance temperature coefficient of the heating element cannot effectively fix the heating element, it is necessary to provide a clamping fixture and a testing system.

[0006] A clamping fixture for fixing a heating element, the clamping fixture comprising:

[0007] A fixing mechanism comprising a first fixing seat and a second fixing seat arranged at intervals; and

[0008] A conductive unit comprising two conductive columns, the two conductive columns being arranged at intervals and jointly connected between the first fixing seat and the second fixing seat;

[0009] Wherein, a fixing gap for limiting the heating element is formed between one end of each conductive column and the second fixing seat, and the conductive unit is used for measuring the resistance value of the heating element.

[0010] In one embodiment, the clamping fixture comprises a plurality of the conductive units, and the plurality of conductive units are arranged at intervals along the circumferential direction of the second fixing seat.

[0011] In one embodiment, the conductive post includes a conductive body, a connecting portion, and a conductive portion. The connecting portion and the conductive portion are respectively provided at opposite ends of the conductive post. The connecting portion is limited in the first fixing portion, and a fixing gap is formed between the conductive portion and the second fixing seat.

[0012] In one embodiment, the outer diameter of the conductive post body is respectively larger than the outer diameters of the connecting portion and the conductive portion.

[0013] In one embodiment, the distance between the conductive portions of two conductive posts of the same conductive unit is adjustable.

[0014] In one embodiment, the conductive post body can rotate relative to the fixing mechanism about its own axis, and the conductive portion is eccentrically arranged relative to the central axis of the conductive post body.

[0015] In one embodiment, in the direction of the interval between the first fixing seat and the second fixing seat, the conductive post can move relative to the second fixing seat so that the height of the fixing gap is adjustable.

[0016] In one embodiment, the clamping fixture further includes an adjusting member. The adjusting member is limited between the first fixing seat and the conductive post. The adjusting member is used to apply a force towards the second fixing seat to the conductive post, and the adjusting member can undergo recoverable deformation under an external force.

[0017] A test system for testing the resistance temperature coefficient of a heating element. The test system includes the above-mentioned clamping fixture, and the test system further includes:

[0018] A heating device having a heating groove with an open end. The heating groove is used to accommodate a heating medium. The first fixing seat of the clamping fixture is supported outside the open end of the heating groove, and the fixing gap is located inside the heating groove. The heating device is used to heat the heating element fixed to the clamping fixture; and

[0019] A testing device electrically connected to the clamping fixture for obtaining the resistance of the heating element and the heating temperature of the heating device.

[0020] In one embodiment, the testing device is electrically connected to the clamping fixture by the four-wire method.

[0021] In the above-mentioned clamping fixture, the heating element is limited in the fixing gap jointly formed by the conductive post and the second fixing seat. The conductive post directly contacts the heating element while fixing the heating element to measure the resistance value of the heating element, thereby ensuring the effective fixing of the heating element while guaranteeing the contact stability between the heating element and the conductive post during the test, and further improving the test accuracy. BRIEF DESCRIPTION OF THE DRAWINGS

[0022] The drawings forming a part of this application are used to provide a further understanding of the present invention. The schematic embodiments and descriptions thereof of the present invention are used to explain the present invention and do not constitute an improper limitation to the present invention.

[0023] In order to more clearly illustrate the technical solutions in the embodiments of the present invention, the drawings required for use in the description of the embodiments will be briefly introduced below. Obviously, the drawings in the following description are only some embodiments of the present invention. For those of ordinary skill in the art, other drawings can be obtained based on these drawings without creative efforts.

[0024] Figure 1 Schematic diagram of a test system according to an embodiment of the present application.

[0025] Figure 2 Schematic structural diagram of a clamping fixture of a test system according to an embodiment of the present application.

[0026] Figure 3 For Figure 2 Partial enlarged view of part A of the shown clamping fixture.

[0027] Figure 4 For Figure 2 Schematic structural diagram of a conductive column of the shown clamping fixture.

[0028] Figure 5 Schematic diagram of a heating device and a clamping fixture of a test system according to an embodiment of the present application.

[0029] Description of reference numerals:

[0030] 100, test system; 120, clamping fixture; 121, fixing mechanism; 1212, first fixing seat; 1214, second fixing seat; 1216, fixing column; 123, conductive unit; 1232, conductive column; 1232a, conductive column body; 1232b, connecting portion; 1232c, conductive portion; 1232d, cam portion; 1232e, limiting portion; 1234, nut; 1236, gasket; 125, adjusting member; 140, heating device; 142, heating tank; 160, test device; 200, heating element. DETAILED DESCRIPTION OF THE EMBODIMENTS

[0031] To make the above objects, features, and advantages of the present application more apparent and understandable, the following provides a detailed description of the specific embodiments of the present application in conjunction with the accompanying drawings. Many specific details are set forth in the following description to facilitate a thorough understanding of the present application. However, the present application can be implemented in many other ways different from those described herein, and those skilled in the art can make similar improvements without departing from the spirit of the present application. Therefore, the present application is not limited by the specific embodiments disclosed below.

[0032] In the description of the present application, it should be understood that if terms such as "center", "longitudinal", "transverse", "length", "width", "thickness", "upper", "lower", "front", "rear", "left", "right", "vertical", "horizontal", "top", "bottom", "inner", "outer", "clockwise", "counterclockwise", "axial", "radial", "circumferential", etc. appear, the orientation or positional relationship indicated by these terms is based on the orientation or positional relationship shown in the accompanying drawings. These are only for the convenience of describing the present application 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. Therefore, it should not be construed as a limitation to the present application.

[0033] In addition, if terms such as "first" and "second" appear, these terms are only for descriptive purposes and should not be construed as indicating or implying relative importance or implicitly specifying the quantity of the indicated technical features. Thus, features defined with "first" and "second" may explicitly or implicitly include at least one such feature. In the description of the present application, if the term "plurality" appears, the meaning of "plurality" is at least two, such as two, three, etc., unless otherwise specifically and clearly defined.

[0034] In the present application, unless otherwise clearly specified and limited, if terms such as "install", "connect", "join", "fix", etc. appear, these terms should be understood in a broad sense. For example, it can be a fixed connection, a detachable connection, or integrated; it can be a mechanical connection or an electrical connection; it can be directly connected or indirectly connected through an intermediate medium, and it can be the communication inside two elements or the interaction relationship between two elements, unless otherwise clearly limited. For those of ordinary skill in the art, the specific meanings of the above terms in the present application can be understood according to specific circumstances.

[0035] In this application, unless otherwise clearly specified and defined, when a first feature is described as being "on" or "under" a second feature or similar expressions, it may mean that the first and second features are in direct contact, or the first and second features are in indirect contact through an intermediate medium. Moreover, the first feature being "above", "over" and "on top of" the second feature may mean that the first feature is directly above or obliquely above the second feature, or simply indicates that the first feature has a higher horizontal height than the second feature. The first feature being "under", "below" and "beneath" the second feature may mean that the first feature is directly below or obliquely below the second feature, or simply indicates that the first feature has a lower horizontal height than the second feature.

[0036] It should be noted that if an element is referred to as being "fixed to" or "disposed on" another element, it may be directly on the other element or there may also be an intermediate element. If an element is considered to be "connected to" another element, it may be directly connected to the other element or there may be an intermediate element at the same time. If so, the terms "vertical", "horizontal", "up", "down", "left", "right" and similar expressions used in this application are only for the purpose of illustration and do not represent the only implementation.

[0037] Refer to Figures 1 to 3 , an embodiment of the present application provides a test system 100 for testing the temperature coefficient of resistance (TCR, Temperature Coefficient of Resistance) of a device under test. The temperature coefficient of resistance is a ratio parameter that describes the change of the resistance value with temperature, indicating the relative change of the resistance value when the temperature changes by 1 °C, and the unit is ppm / °C.

[0038] In the following embodiments, the test system 100 is used to measure the temperature coefficient of resistance of the heating element 200 of the electronic atomization device. The heating element 200 includes a substrate and a heating layer formed on the substrate. The substrate can be formed of a high-temperature resistant porous material such as ceramics, and the heating layer can be formed of a conductive material such as a metal wire. The heating element 200 can be heated under the action of electric energy, so as to heat and atomize the atomization medium stored in the electronic atomization device, and finally generate an aerosol for the user to use. It can be understood that the shape of the heating element 200 is not limited. In some embodiments, the heating element 200 is in a cubic shape.

[0039] It should be noted that the embodiments of the present application are only used as examples for illustration and do not limit the technical scope of the present application. In some other embodiments, the test system 100 can also be used to test the temperature coefficient of resistance of other elements.

[0040] The test system 100 includes a clamping fixture 120, a heating device 140, and a testing device 160. Among them, the clamping fixture 120 is used to fix the heating element 200 and position it in the heating device 140. The heating device 140 is used to heat the heating element 200. The test system 100 is used to obtain the resistance change curve of the heating element 200 during the heating process, and then obtain the resistance temperature coefficient of the heating element 200 based on the resistance change curve.

[0041] In some embodiments, the clamping fixture 120 includes a fixing mechanism 121 and a conductive unit 123. The fixing mechanism 121 includes a first fixing seat 1212 and a second fixing seat 1214 arranged at intervals. The conductive unit 123 includes two conductive columns 1232. Each conductive column 1232 is arranged at intervals and is jointly connected between the first fixing seat 1212 and the second fixing seat 1214. Among them, a fixing gap for positioning the heating element 200 is formed between one end of each conductive column 1232 and the second fixing seat 1214. The conductive unit 123 is used to measure the resistance value of the heating element 200.

[0042] In this way, the heating element 200 is positioned in the fixing gap jointly formed by the conductive column 1232 and the second fixing seat 1214. The conductive column 1232 directly contacts the heating element 200 while fixing the heating element 200 to measure the resistance value of the heating element 200. Thus, while effectively fixing the heating element 200, the contact stability between the heating element 200 and the conductive column 1232 during the test is ensured, and the test accuracy is improved.

[0043] In the following embodiments, the height direction of the clamping fixture 120 is defined as the first direction (i.e., Figure 2 the Z direction shown), the length direction of the clamping fixture 120 is defined as the second direction (i.e., Figure 2 the X direction shown), and the width direction of the clamping fixture 120 is defined as the third direction (i.e., Figure 2 the Y direction shown). The first direction, the second direction, and the third direction intersect pairwise. As a preferred embodiment, the first direction, the second direction, and the third direction are perpendicular to each other pairwise.

[0044] Please refer to Figures 2 to 4 , the first fixing seat 1212 and the second fixing seat 1214 are in a rectangular flat plate structure. The first fixing seat 1212 and the second fixing seat 1214 are arranged at intervals and parallel in the first direction. The thickness direction of the first fixing seat 1212 and the second fixing seat 1214 is parallel to the first direction. The length direction of the first fixing seat 1212 and the length direction of the second fixing seat 1214 are parallel to the second direction. The width direction of the first fixing seat 1212 and the second fixing seat 1214 is parallel to the third direction.

[0045] As a preferred embodiment, rectangular communication grooves are provided at the central positions of the first fixing base 1212 and the second fixing base 1214, so as to reduce the weight of the fixing mechanism 121 while ensuring the structural strength. The length of the first fixing base 1212 is greater than that of the second fixing base 1214, which is convenient for cooperation with the heating device 140. It can be understood that the shapes of the first fixing base 1212 and the second fixing base 1214 are not limited and can be set according to needs to meet different requirements.

[0046] In some embodiments, the clamping fixture 120 further includes a plurality of fixing columns 1216. The central axis of each fixing column 1216 extends along the first direction. The two end portions of each fixing column 1216 are respectively inserted into the first fixing base 1212 and the second fixing base 1214, and are respectively fixed to the first fixing base 1212 and the second fixing base 1214 through nuts, so that the first fixing base 1212 and the second fixing base 1214 are relatively fixed. Specifically, in one embodiment, the clamping fixture 120 includes four fixing columns 1216, and the four fixing columns are arranged in a matrix. It can be understood that the number and arrangement manner of the fixing columns 1216 are not limited and can be set according to needs to meet different fixing requirements.

[0047] The clamping fixture 120 includes a plurality of conductive units 123. The plurality of conductive units 123 are arranged at intervals along the circumferential direction of the second fixing base 1214. Each conductive unit 123 is used to fix and detect a heating element 200. In this way, the clamping fixture 120 can fix a plurality of heating elements 200 simultaneously through multiple groups of conductive units 123, and obtain the resistance temperature coefficients of the plurality of heating elements 200 simultaneously, thereby realizing the batch testing of the heating elements 200 and effectively improving the testing efficiency.

[0048] Specifically, in one embodiment, the clamping fixture 120 includes four groups of conductive units 123. Two of the groups of conductive units 123 are arranged at intervals in the first direction on opposite sides of the fixing mechanism 121, and all the conductive columns 1232 in each group of conductive units 123 are arranged at intervals in the second direction. The remaining two groups of conductive units 123 are arranged at intervals in the second direction on opposite sides of the fixing mechanism 121, and all the conductive columns 1232 in each group of conductive units 123 are arranged at intervals in the first direction. It can be understood that the number and arrangement direction of the conductive columns 1232 are not limited to this and can be set according to needs to meet different requirements.

[0049] The conductive post 1232 includes an integrally formed conductive post body 1232a, a connecting portion 1232b, and a conductive portion 1232c. Among them, the conductive post body 1232a has a cylindrical structure, and the central axis of the conductive post body 1232a is parallel to the first direction. The connecting portion 1232b and the conductive portion 1232c are respectively provided at opposite ends of the conductive post 1232. The connecting portion 1232b is limited in the first fixing seat 1212, and a fixing gap for fixing the heating element 200 is formed between the conductive portion 1232c and the second fixing seat 1214.

[0050] As a preferred embodiment, the conductive post 1232 is formed of copper or its alloy with better conductivity. And since the resistance of the conductive post 1232 is inversely proportional to the size of its cross-sectional area, the outer diameter of the conductive post body 1232a is respectively larger than the outer diameters of the connecting portion 1232b and the conductive portion 1232c, thereby effectively reducing the resistance of the conductive post 1232 and meeting the requirement that the external resistance ≤ 10 mΩ during the test of the heating element 200. Further, in some embodiments, the conductive post 1232 can also be subjected to a plating treatment, such as electroplating a gold layer, to further reduce the resistance value of the conductive post 1232.

[0051] It can be understood that when other requirements are met, the conductive post 1232 has a relatively large outer diameter, so that its own resistance can be further reduced. The material of the conductive post 1232 can be set as required, or the conductive post 1232 can be processed by different methods to meet different requirements.

[0052] The first fixing seat 1212 is provided with mounting holes, and each mounting hole is correspondingly arranged with a conductive post 1232. The aperture of the mounting hole is larger than the outer diameter of the conductive post body 1232a, and one end of the conductive post body 1232a provided with the connecting portion 1232b is inserted into the mounting hole. The connecting portion 1232b protrudes from the side of the first fixing seat 1212 facing away from the second fixing seat 1214, and the end of the connecting portion 1232b connecting the conductive post body 1232a is provided with an external thread. The conductive unit 123 further includes a nut 1234 and a gasket 1236. The gasket 1236 is sleeved on the connecting portion 1232b and abuts against the first fixing seat 1212. The nut 1234 is sleeved on the connecting portion 1232b and abuts against the side of the gasket 1236 facing away from the mounting hole, and the nut 1234 is threadedly connected to the conductive post body 1232a.

[0053] One side of the outer wall of one end of the conductive post body 1232a facing the second fixing seat 1214 is convexly provided with a cam portion 1232d, and the conductive portion 1232c is convexly provided on the side of the cam portion 1232d away from the conductive post body 1232a. The conductive portion 1232c is eccentrically arranged with respect to the central axis of the conductive post body 1232a. The conductive post body 1232a can rotate relative to the fixing mechanism 121 around its own axis to drive the conductive portion 1232c to rotate around the central axis of the conductive post body 1232a. In this way, by rotating at least one conductive post 1232 in the same conductive unit 123, the distance between the conductive portions 1232c of the two conductive posts 1232 can be adjusted, so as to adapt to heating elements 200 of different shapes.

[0054] In some embodiments, in the first direction, the conductive post 1232 can move relative to the second fixing seat 1214 so that the height of the fixing gap in the first direction is adjustable, so that the conductive post 1232 forms an elastic preloading fastening on the heating element 200, so as to ensure that during the temperature change process, the contact between the heating element 200 and the conductive post 1232 is prevented from loosening due to the thermal expansion and contraction of the heating element 200 and the clamping fixture 120 itself, thereby further improving the fixing stability of the heating element 200.

[0055] Specifically, the clamping fixture 120 further includes an adjusting member 125. The adjusting member 125 is limited between the first fixing seat 1212 and the conductive post 1232. The adjusting member 125 is used to apply a force to the conductive post 1232 towards the second fixing seat 1214, and the adjusting member 125 can undergo a recoverable deformation under an external force.

[0056] More specifically, the conductive post body 1232a of the conductive post 1232 is convexly provided with an annular limiting portion 1232e extending along the circumferential direction. The adjusting member 125 is a compression spring. The adjusting member 125 is sleeved outside the conductive post body 1232a, and one end of the adjusting member 125 abuts against the surface of the first fixing seat 1212 facing the second fixing seat 1214, and the other end of the adjusting member 125 abuts against the limiting portion 1232e of the conductive post 1232. The adjusting member 125 is in a compressed state, so as to provide a force to the conductive post 1232 towards the second fixing seat 1214. It can be understood that the specific structure of the adjusting member 125 is not limited to this, and it can also be formed of an elastic material such as rubber.

[0057] The heating device 140 has a heating groove 142 with one end open. The heating groove 142 contains a heating medium for heating. The first fixing seat 1212 of the clamping fixture 120 is supported outside the open end of the heating groove 142, and the fixing gap is located in the heating groove 142, so that the heating element 200 fixed in the fixing gap is immersed in the heating medium. The heating device 140 can automatically and accurately heat the heating element 200 fixed to the clamping fixture 120.

[0058] As a preferred embodiment, the heating device 140 is an oil bath pot capable of automatically controlling the heating temperature. The heating medium is preferably silicone oil. The viscosity of the heating medium is ≤500 cSt, so that it has good fluidity and thus has high temperature uniformity, with the uniformity and accuracy ≤ ±0.5 °C. It can be understood that in some other embodiments, the specific material of the heating medium is not limited to this and can be set according to needs to meet different heating requirements.

[0059] In some embodiments, the testing device 160 and the clamping fixture 120 are electrically connected by a four-wire method through an electrical connection wire. One end of the electrical connection wire is connected to the conductive column 1232 through a nut 1234, and the other end of the electrical connection wire is connected to the testing device 160. The testing device 160 can automatically collect the resistance change curve of the heating element 200 fixed on the clamping fixture 120, thereby eliminating human measurement errors. Moreover, it supports multi-channel collection corresponding to multiple conductive units 123, so as to achieve batch testing at one time, effectively improving the testing efficiency. It can be understood that the electrical connection method between the testing device 160 and the clamping fixture 120 is not limited and can be set according to needs to meet different connection requirements.

[0060] Among them, the four-wire method (also known as the four-terminal measurement technique or Kelvin measurement method) is a method for impedance measurement in electronic circuits, mainly used for accurately measuring low resistance values. It separates the current excitation and voltage detection circuits, thereby eliminating the influence of test leads and contact resistance, so it has high measurement accuracy. Therefore, by connecting the testing device 160 and the clamping fixture 120 by the four-wire method, the influence of external wiring resistance can be eliminated, further improving the measurement accuracy.

[0061] The above-mentioned testing system 100 can effectively fix and stably electrically connect the heating element 200 through the clamping fixture 120, and realize functions such as automatic heating, data collection, and report generation through the heating device 140 and the testing device 160, and automatically control the temperature rise and fall and stability. Since the entire testing process can be automatically carried out, human testing errors are effectively eliminated, and it has high measurement accuracy and testing efficiency.

[0062] The technical features of the above-described embodiments can be combined arbitrarily. For the sake of brevity of description, not all possible combinations of the technical features in the above embodiments are described. However, as long as the combinations of these technical features do not conflict, they should be considered as the scope described in this specification.

[0063] The above-described embodiments merely represent several implementation manners of the present application. The description thereof is relatively specific and detailed, but it should not be construed as a limitation on the scope of the patent application. It should be noted that for those of ordinary skill in the art, without departing from the concept of the present application, several modifications and improvements can still be made, and these all fall within the protection scope of the present application. Therefore, the protection scope of the patent of the present application shall be subject to the appended claims.

Claims

1. A clamping fixture for fixing a heating element, characterized in that, The clamping fixture includes: A fixing mechanism, including a first fixing seat and a second fixing seat arranged at intervals; and A conductive unit, including two conductive columns, the two conductive columns are arranged at intervals and are jointly connected between the first fixing seat and the second fixing seat; Wherein, a fixing gap for limiting the heating element is formed between one end of each conductive column and the second fixing seat, and the conductive unit is used to measure the resistance value of the heating element.

2. The clamping fixture according to claim 1, wherein The clamping fixture includes a plurality of the conductive units, and the plurality of conductive units are arranged at intervals along the circumferential direction of the second fixing seat.

3. The clamping fixture according to claim 1, wherein The conductive column includes a conductive main body, a connecting portion and a conductive portion, the connecting portion and the conductive portion are respectively arranged at opposite ends of the conductive column, the connecting portion is limited in the first fixing portion, and the fixing gap is formed between the conductive portion and the second fixing seat.

4. The clamping fixture according to claim 3, wherein The outer diameter of the conductive column main body is respectively larger than the outer diameter of the connecting portion and the outer diameter of the conductive portion.

5. The clamping fixture according to claim 3, wherein The distance between the conductive portions of the two conductive columns of the same conductive unit is adjustable.

6. The clamping fixture according to claim 5, characterized in that, The conductive column main body can rotate relative to the fixing mechanism around its own axis, and the conductive portion is eccentrically arranged relative to the central axis of the conductive column main body.

7. The clamping fixture according to claim 1, wherein, In the interval direction between the first fixing seat and the second fixing seat, the conductive column can move relative to the second fixing seat so that the height of the fixing gap is adjustable.

8. The clamping fixture according to claim 7, wherein The clamping fixture further includes an adjusting member, the adjusting member is limited between the first fixing seat and the conductive column, the adjusting member is used to apply a force towards the second fixing seat to the conductive column, and the adjusting member can undergo a recoverable deformation under an external force.

9. A test system for testing the resistance temperature coefficient of a heating element, characterized in that, The testing system includes the clamping fixture according to any one of claims 1 to 8, and the testing system further includes: A heating device, having a heating groove with an open end, the heating groove is used to accommodate a heating medium, the first fixing seat of the clamping fixture is supported outside the open end of the heating groove, the fixing gap is located in the heating groove, and the heating device is used to heat the heating element fixed to the clamping fixture; and A testing device, electrically connected to the clamping fixture, for obtaining the resistance of the heating element and the heating temperature of the heating device.

10. The test system according to claim 9, wherein The testing device is electrically connected to the clamping fixture by a four-wire method.

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