Temperature characteristic testing device for thermistor

Abstract

The invention relates to the field of thermistor temperature detection, and discloses a temperature characteristic testing device for thermistors, which comprises a base, a plurality of slots are linearly arranged at the top of the base, the thermistors are inserted in the slots, a fixing structure is arranged in the base, a temperature control structure is arranged at the top of the base, and a temperature sensor is arranged in the temperature control structure. The temperature control structure comprises a shell, the interior of the shell is hollow, the temperature characteristic testing device for the thermistor is provided with the temperature control structure, and the temperature control structure can control the two movable plates which move up and down in a staggered mode through the rotary knob to refrigerate and heat the thermistor. A temperature control machine does not need to be replaced frequently, better temperature control over the thermistor is achieved, and when the resistance condition of the thermistor in the high-temperature state needs to be detected, only the rotary knob needs to be rotated, and the movable plate with the heating plate can move downwards to the position closest to the thermistor.

Description

Technical Field

[0001] The invention relates to the technical field of thermistor temperature detection, in particular to a temperature characteristic testing device for a thermistor. Background Art

[0002] In the patent application with application publication number CN204694378U, it includes a thermistor fixture, a temperature control box and a controller, the thermistor fixture and the temperature control box are electrically connected to the controller, and the controller is connected to a display device. A test chamber is provided in the temperature control box, the thermistor fixture is located in the test chamber, air flow holes are provided on the surrounding side walls of the test chamber, an air flow channel is provided between the surrounding side walls of the test chamber and the outer wall of the temperature control box, the air flow holes are connected to the air flow channel, a heating device is provided at the bottom of the test chamber, a fan device is provided below the heating device, and a temperature sensor is also provided in the test chamber. The advantages are: a thermistor fixture is provided, the thermistor is fixed on the thermistor fixture, the thermistor fixture is placed in a test cavity, the temperature control box can control the temperature in the test cavity, the resistance value of the tested thermistor and the temperature in the test cavity are directly fed back to the controller, the controller can directly generate the resistance-temperature characteristic curve of the thermistor, the test is very convenient, the test accuracy is high, no manual participation is required, the test cost is reduced, the test efficiency is improved, the market application prospect is broad, and it can be widely used in the temperature and resistance characteristic test of thermistor products.

[0003] In the prior art including the above-mentioned patents and in actual products, the comparative documents are suitable for production batch testing of temperature detection of thermistors, and cannot be used for comparative temperature detection of new and old product thermistors. When testing temperature in the laboratory, the thermistor is mostly placed in cold and hot water at the same temperature for a certain period of time, then taken out and wiped dry, and then the pins are plugged into a foam board and measured with a multimeter in both hands. Since the pins are thin and the plugging is not stable enough, the thermistor is easy to tilt and fall during testing, and testing and recording need to be done by two people separately. The switching of hot and cold temperatures is also more troublesome, resulting in the inability to quickly, effectively and accurately record and observe the value changes of the thermistor at different temperatures. Summary of the invention

[0004] The problem to be solved by the present invention is that when testing a thermistor, artificial heating of hot and cold water cannot set the temperature and cannot effectively fix the thermistor for detection.

[0005] In order to solve the above technical problems, the technical solution of the present invention is: a temperature characteristic test device for a thermistor, comprising a base, a top of the base is arranged in a straight line with a plurality of slots, the slots are plugged with thermistors, a fixing structure is provided inside the base, and a temperature control structure is provided on the top of the base; The temperature control structure includes a shell, the interior of the shell is hollow, one side of the shell is provided with two movable plates that can move alternately with each other, the interior of the shell is rotatably provided with a gear, one side of the shell is rotatably provided with a knob, and one side of the knob is fixedly connected to one side of the gear.

[0006] Preferably, limit blocks are fixedly provided on the front and back sides of the inner wall of the shell, racks are slidably provided on the limit blocks, the racks slide up and down along the limit blocks, and the racks are meshed with gears.

[0007] Preferably, a connecting block is fixedly provided on one side of the rack, one side of the connecting block penetrates the shell and extends to the outside of the shell, and one side of the connecting block is fixedly connected to one side of the movable plate.

[0008] Preferably, there are two movable plates, a heating plate is fixedly provided on the front side of one of the movable plates, a cooling plate is provided on the front side of the other movable plate, and cooling fans are provided on both sides of the front side of the cooling plate.

[0009] Preferably, the fixing structure includes a slide plate, one side of which slides through the base and extends to the inside of the base, a control block is fixedly provided on the top of the slide plate, a clamping block is fixedly provided on one side of the slide plate, and a pull ring is fixedly provided on one side of the clamping block.

[0010] Preferably, a tilting block is fixedly provided on one side of the inner wall of the slot, and a positioning plate is fixedly provided on the other side of the inner wall of the slot, and the positioning plate is L-shaped.

[0011] Preferably, a rotating plate is rotatably provided between the front and back sides of the inner wall of the base, and a fixing block is rotatably provided on the top of the rotating plate, and the fixing block is used to fix the thermistor.

[0012] Preferably, a roller is provided at the bottom of the rotating plate, the roller is matched with the control block, a spring is fixedly provided at the bottom of one side of the rotating plate, and the other side of the spring is fixedly connected to the inner wall of the base.

[0013] Preferably, a groove is provided on one side of the base, a magnetic block is provided on the top of one side of the groove, the magnetic block is adapted to the clamping block, an outer plate is provided on the front side of the base, and measuring instruments are provided on both sides of the front side of the base.

[0014] Compared with the prior art, the technical solution of the present invention has the following advantages: (1) A temperature control structure is provided on the base. The temperature control structure can control two movable plates that move up and down in an interlaced manner through a knob to achieve cooling and heating of the thermistor. There is no need to frequently replace the temperature control machine and to achieve better temperature control of the thermistor. When it is necessary to test the resistance of the thermistor under high temperature, only the knob needs to be rotated to move the movable plate with the heating plate down to the position closest to the thermistor. Conversely, when cooling is required, the heating plate can be raised and the cooling plate can be lowered. When cooling is required after heating or the heating plate needs to be cooled, the thermistor can be aligned at the same height when it returns to normal temperature. The heating is turned off and the cooling is turned on to quickly achieve temperature equilibrium. This open heating and cooling can be performed in a small range. Once stopped, the temperature can be quickly restored to normal temperature without waiting for a long time. It is convenient to test whether the thermistor will be damaged after returning to the initial temperature after experiencing extreme environments. In addition, the base is small in size, which is convenient for users to carry and move, and is more suitable for use in laboratories and other working environments. (2) A fixed structure is provided inside the base. The fixed structure allows the user to quickly fix the thermistor by simple push-pull actions when testing the thermistor through the cooperation between the slide plate and the rotating plate. Compared with the loose fixation of the direct-inserted foam plate, the fixed structure does not require too much manpower during the detection process of the thermistor, allowing the user to more attentively record the changes in the resistance value of the thermistor. When the slide plate is opened, the thermistor can be removed. When the slide plate is closed, the pin of the thermistor can be fixed by controlling the linkage with the rotating plate. An iron block is provided on one side of the slide plate to cooperate with the magnetic block on one side of the base to produce a fixing effect. The fixed structure also has a tilting block and a positioning plate. The tilting block can play a guiding role through its tilted edge to guide the inner corner to move downward without tilting. The positioning plate can ensure that the depth of the pin is not too deep to cause the body of the thermistor to contact the base. BRIEF DESCRIPTION OF THE DRAWINGS

[0015] Figure 1 It is a schematic diagram of the overall structure of the present invention; Figure 2 This is a schematic diagram of the internal structure of the base of the present invention; Figure 3 It is a front view schematic diagram of the internal structure of the base of the present invention; Figure 4 It is a top view schematic diagram of the base structure of the present invention; Figure 5 This is a schematic diagram of the structure of the skateboard of the present invention; Figure 6 This is a schematic diagram of the tilting block structure of the present invention; Figure 7 This is a schematic diagram of the structure of the rotating plate of the present invention; Figure 8 It is an exploded schematic diagram of the fixed structure of the present invention; Fig. 9 It is a schematic diagram of the dislocation movement of the movable plate structure of the present invention; Fig.10 It is a front view schematic diagram of the movable plate structure of the present invention; Fig.11 It is a schematic diagram of the gear structure of the present invention.

[0016] In the figure: 1. temperature control structure; 101. shell; 102. movable plate; 103. cooling plate; 104. knob; 105. cooling fan; 106. heating plate; 107. rack; 108. limit block; 109. gear; 110. connecting block; 2. base; 3. fixed structure; 301. pull ring; 302. clamping block; 303. slide plate; 304. positioning plate; 305. tilting block; 306. control block; 307. fixed block; 308. rotating plate; 309. roller; 310. spring; 4. thermistor; 5. slot; 6. measuring instrument; 7. outer plate; 8. magnetic block. DETAILED DESCRIPTION

[0017] In order to make the purpose, technical solution and advantages of the embodiments of the present disclosure clearer, the technical solution of the embodiments of the present disclosure will be clearly and completely described below in conjunction with the drawings of the embodiments of the present disclosure. Obviously, the described embodiments are part of the embodiments of the present disclosure, not all of the embodiments. Based on the described embodiments of the present disclosure, all other embodiments obtained by ordinary technicians in this field without creative work are within the scope of protection of the present disclosure.

[0018] Unless otherwise defined, the technical terms or scientific terms used in the present disclosure should be understood by people with ordinary skills in the field to which the present disclosure belongs. "Include" or "comprise" and other similar words used in the present disclosure mean that the elements or objects appearing before the word include the elements or objects listed after the word and their equivalents, without excluding other elements or objects. "Connect" or "connected" and other similar words are not limited to physical or mechanical connections, but may also include electrical connections, whether direct or indirect. "Up", "down", "left", "right", etc. are only used to indicate relative positional relationships. When the absolute position of the described object changes, the relative positional relationship may also change accordingly.

[0019] like Figures 1 to 11 As shown, a temperature characteristic test device for a thermistor provided by the present invention comprises a base 2, a plurality of slots 5 are arranged in a straight line on the top of the base 2, a thermistor 4 is inserted into the slot 5, a fixing structure 3 is provided inside the base 2, and a temperature control structure 1 is provided on the top of the base 2; The temperature control structure 1 includes a shell 101, the interior of the shell 101 is hollow, and two movable plates 102 that can move alternately with each other are provided on one side of the shell 101. A gear 109 is rotatably provided inside the shell 101, and a knob 104 is rotatably provided on one side of the shell 101, and one side of the knob 104 is fixedly connected to one side of the gear 109.

[0020] Limit blocks 108 are fixedly provided on the front and back of the inner wall of the housing 101 , and a rack 107 is slidably provided on the limit blocks 108 . The rack 107 slides up and down along the limit blocks 108 , and the rack 107 is meshed with a gear 109 .

[0021] A connecting block 110 is fixedly provided on one side of the rack 107 . One side of the connecting block 110 penetrates the housing 101 and extends to the outside of the housing 101 . One side of the connecting block 110 is fixedly connected to one side of the movable plate 102 .

[0022] There are two movable plates 102 , a heating plate 106 is fixedly provided on the front of one movable plate 102 , a cooling plate 103 is provided on the front of the other movable plate 102 , and cooling fans 105 are provided on both sides of the front of the cooling plate 103 .

[0023] The fixed structure 3 includes a slide plate 303, one side of which slides through the base 2 and extends to the inside of the base 2, a control block 306 is fixedly provided on the top of the slide plate 303, a clamping block 302 is fixedly provided on one side of the slide plate 303, and a pull ring 301 is fixedly provided on one side of the clamping block 302.

[0024] A tilting block 305 is fixedly provided on one side of the inner wall of the slot 5 , and a positioning plate 304 is fixedly provided on the other side of the inner wall of the slot 5 . The positioning plate 304 is L-shaped.

[0025] A rotating plate 308 is rotatably provided between the front and back sides of the inner wall of the base 2 , and a fixing block 307 is rotatably provided on the top of the rotating plate 308 . The fixing block 307 is used to fix the thermistor 4 .

[0026] A roller 309 is provided at the bottom of the rotating plate 308 , and the roller 309 is adapted to the control block 306 . A spring 310 is fixedly provided at the bottom of one side of the rotating plate 308 , and the other side of the spring 310 is fixedly connected to the inner wall of the base 2 .

[0027] A groove is provided on one side of the base 2 , a magnetic block 8 is provided on the top of one side of the groove, the magnetic block 8 is matched with the clamping block 302 , an outer plate 7 is provided on the front side of the base 2 , and measuring instruments 6 are provided on both sides of the front side of the base 2 .

[0028] The working principle and use process of the present invention are as follows: when using, the user first aligns the two pins at the bottom of the thermistor 4 with the slots 5 at the top of the base 2, and then inserts the pins into the slots 5. During insertion, the bevel of the tilting block 305 guides the pins to move to the horizontal plate at the bottom of the positioning plate 304, and stops when the pins feel resistance when inserted downward. The number of thermistors 4 to be plugged in is selected according to the needs, and one is plugged in for a separate test, and two are plugged in for a comparative test. After the plugging is completed, the clamping block 302 is pushed to one side, and the clamping block 302 drives the slide plate 303 to move to one side. The slide plate 303 drives the control block 306 to move to one side. As the control block 306 continues to move, it will contact the roller 309 at the bottom of the rotating plate 308, and drive the rotating plate 308 to rotate with the rotation connection with the inner wall of the base 2 as the center. The rotation of the rotating plate 308 will squeeze the spring 310 and rotate itself. After the rotating plate 308 rotates, it will drive the fixing block 307 to fix the pin of the thermistor 4 to avoid looseness during detection. The rotating plate 308 is electrically connected to the measuring instrument 6. The rotating plate 308 is While rotating and fixing, the resistance value can also be detected in conjunction with the measuring instrument 6. At this time, the clamping block 302 moves to the innermost part and is attracted together with the magnetic block 8, which increases the fixation and frees the user's hands. When the thermistor 4 needs to be removed in the later stage, it is only necessary to buckle the pull ring 301 and pull it to one side to open the clamping block 302. After the thermistor 4 is fixed, the heating or cooling can be controlled according to the detection needs. When adjusting, the knob 104 is rotated, and the knob 104 drives the gear 109 to rotate, and the gear 109 drives the two racks 107 to rotate along the limit block 108. The heating plate 106 and the cooling plate 103 are moved up and down in an alternating manner. When a high temperature environment needs to be simulated, the heating plate 106 is moved to the position closest to the thermistor 4. When the temperature needs to be restored after heating, the heating plate 106 and the cooling plate 103 are moved to the same position, and the heating is turned off and the cooling is turned on to quickly restore the temperature of the thermistor 4 to a normal state. When cooling is needed, the cooling plate 103 is similarly moved to the position closest to the thermistor 4. During temperature simulation, the user can use the measuring instrument 6 to detect the changes of the thermistor 4 at different temperatures in real time, allowing the user to use it more attentively or record it more accurately.

[0029] The above embodiments are only exemplary embodiments of the present invention and are not intended to limit the present invention. The protection scope of the present invention is defined by the claims. Those skilled in the art may make various modifications or equivalent substitutions to the present invention within the essence and protection scope of the present invention, and such modifications or equivalent substitutions shall also be deemed to fall within the protection scope of the present invention.

Claims

1. A temperature characteristic testing device for a thermistor, comprising a base (2), characterized in that: The top of the base (2) is provided with a plurality of slots (5) arranged in a straight line, the slots (5) are plugged with thermistors (4), a fixing structure (3) is provided inside the base (2), and a temperature control structure (1) is provided on the top of the base (2); The temperature control structure (1) comprises a shell (101), the interior of the shell (101) is hollow, one side of the shell (101) is provided with two movable plates (102) that can move in an interlaced manner with each other, a gear (109) is rotatably provided inside the shell (101), and one side of the shell (101) is rotatably provided with a knob (104), and one side of the knob (104) is fixedly connected to one side of the gear (109).

2. A temperature characteristic testing device for a thermistor according to claim 1, characterized in that: Limit blocks (108) are fixedly provided on the front and back sides of the inner wall of the housing (101), a rack (107) is slidably provided on the limit blocks (108), the rack (107) slides up and down along the limit blocks (108), and the rack (107) and the gear (109) are meshed with each other.

3. A temperature characteristic testing device for a thermistor according to claim 2, characterized in that: A connecting block (110) is fixedly provided on one side of the rack (107), one side of the connecting block (110) penetrates the outer shell (101) and extends to the outside of the outer shell (101), and one side of the connecting block (110) is fixedly connected to one side of the movable plate (102).

4. A temperature characteristic testing device for a thermistor according to claim 1, characterized in that: There are two movable plates (102), one of which has a heating plate (106) fixedly disposed on the front side thereof, and the other movable plate (102) has a cooling plate (103) disposed on the front side thereof, and cooling fans (105) are disposed on both sides of the front side of the cooling plate (103).

5. A temperature characteristic testing device for a thermistor according to claim 1, characterized in that: The fixed structure (3) comprises a slide plate (303), one side of the slide plate (303) slides through the base (2) and extends to the inside of the base (2), a control block (306) is fixedly provided on the top of the slide plate (303), a clamping block (302) is fixedly provided on one side of the slide plate (303), and a pull ring (301) is fixedly provided on one side of the clamping block (302).

6. A temperature characteristic testing device for a thermistor according to claim 1, characterized in that: A tilting block (305) is fixedly provided on one side of the inner wall of the slot (5), and a positioning plate (304) is fixedly provided on the other side of the inner wall of the slot (5), wherein the positioning plate (304) is L-shaped.

7. A temperature characteristic testing device for a thermistor according to claim 1, characterized in that: A rotating plate (308) is rotatably provided between the front and back sides of the inner wall of the base (2), and a fixing block (307) is rotatably provided on the top of the rotating plate (308), wherein the fixing block (307) is used to fix the thermistor (4).

8. A temperature characteristic testing device for a thermistor according to claim 7, characterized in that: A roller (309) is provided at the bottom of the rotating plate (308), and the roller (309) is adapted to the control block (306). A spring (310) is fixedly provided at the bottom of one side of the rotating plate (308), and the other side of the spring (310) is fixedly connected to the inner wall of the base (2).

9. A temperature characteristic testing device for a thermistor according to claim 1, characterized in that: A groove is provided on one side of the base (2), a magnetic block (8) is provided on the top of one side of the groove, the magnetic block (8) is matched with the clamping block (302), an outer plate (7) is provided on the front side of the base (2), and measuring instruments (6) are provided on both sides of the front side of the base (2).

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