Resistance testing device

Abstract

The utility model relates to the technical field of resistance testing, and discloses a resistance testing device, which comprises a constant current power supply, four corners of the lower surface of the constant current power supply are fixedly connected with supporting legs, four corners of the upper surface of the constant current power supply are fixedly connected with supporting rods, the tops of the supporting rods are fixedly connected with a permeable plate, and the permeable plate is fixedly connected with the bottom of the constant current power supply. A heat dissipation mechanism is arranged above the constant-current power supply, fixing mechanisms are arranged on the left side and the right side above the permeable plate, a placement mechanism is arranged on the back face above the permeable plate, and the heat dissipation mechanism comprises a fixing cylinder. External sundries and the like are filtered through the fixed barrels and the filter discs which are mounted on the left side and the right side of the upper surface of the constant-current power supply, the motor drives the cooling fan to operate through the rotating shaft at the top, cooling liquid is introduced into the condensing coil through the liquid inlet pipe and flows out of the liquid outlet pipe to form circulation, and a sample on the surface of the permeable plate is cooled; therefore, the effect of preventing the measurement result from being influenced by the temperature in the sample testing process can be achieved.

Description

Technical Field

[0001] The utility model relates to the technical field of resistance testing, in particular to a resistance testing device. Background Art

[0002] As modern electronic products become more complex, higher requirements are placed on the reliability and stability of electrical components and materials. Traditional resistance measurement methods usually only consider the resistance value under static conditions, while ignoring the changes that may occur when subjected to steady-state current for a long time.

[0003] The steady-state current impulse test can simulate situations that may be encountered in actual usage scenarios, helping engineers better understand the performance of products under extreme conditions. However, existing test equipment will generate a certain amount of heat when testing samples. When the heat is too high, it may affect the measurement results and often cannot provide sufficiently accurate data. Utility Model Content

[0004] 1. Technical issues to be resolved

[0005] In view of the deficiencies in the prior art, the utility model provides a resistance testing device, which has the advantages of avoiding the influence of temperature on the measurement results during the sample testing process, and solves the problems mentioned in the above background technology.

[0006] (II) Technical solution

[0007] To achieve the above-mentioned purpose, the utility model provides the following technical solutions: a resistance testing device, comprising a constant current power supply, wherein the four corners of the lower surface of the constant current power supply are fixedly connected with supporting feet, the four corners of the upper surface of the constant current power supply are fixedly connected with support rods, the top of the support rod is fixedly connected with a breathable plate, a heat dissipation mechanism is arranged above the constant current power supply, the left and right sides above the breathable plate are provided with fixing mechanisms, and the upper back of the breathable plate is provided with a placement mechanism, the heat dissipation mechanism comprises a fixed cylinder, the number of the fixed cylinders is two, the bottoms of the two fixed cylinders are respectively fixedly connected to the left and right sides of the upper surface of the constant current power supply, the upper surface of the fixed cylinder is fixedly connected with a filter plate, the middle of the left and right sides of the upper surface of the constant current power supply are fixedly installed with motors, the top of the motor is provided with a rotating shaft, and the top of the rotating shaft is provided with a cooling fan, the lower surface of the breathable plate is fixedly connected with a condensing coil, the middle of the left side of the condensing coil is fixedly connected with a liquid inlet pipe, and the middle of the right side of the condensing coil is fixedly connected with a liquid outlet pipe.

[0008] Preferably, the fixing mechanism comprises two fixing blocks, the bottoms of the two fixing blocks are respectively fixedly connected to the middle of the left and right sides of the upper surface of the air-permeable plate, and a first threaded rod is provided in the middle of the upper interior of the fixing block.

[0009] Preferably, one end of the first threaded rod is fixedly connected to a turning handle, and the other end of the first threaded rod is fixedly connected to a squeezing disk.

[0010] The bottoms of the two fixed blocks are respectively vertically connected to the middle of the left and right sides of the upper surface of the air-permeable plate. The first threaded rod runs through the interior of the fixed block and can perform threaded rotation movement inside the fixed block. By turning the handle, the extrusion plate is driven to move through the first threaded rod to extrude and fix the sample.

[0011] Preferably, the placement mechanism comprises a telescopic rod, the bottom of which is fixedly connected to the middle of one side of the upper surface of the air-permeable plate close to the back side.

[0012] Preferably, a placement block is fixedly connected to the top of the telescopic rod, a second threaded rod is provided in the middle of the right side of the placement block, and a fixed plate is fixedly connected to the left side of the second threaded rod.

[0013] Preferably, a multimeter is arranged above the placement block.

[0014] The bottom of the telescopic rod is vertically connected to the middle part of the upper surface of the air-permeable plate near the back side. The placement block can move up and down through the telescopic rod at the bottom. The second threaded rod runs through the middle part of the right side of the placement block and can perform threaded rotation movement inside it. Rotating the second threaded rod drives the fixed plate to move, and then fixes the multimeter, and the resistance value of the sample is tested by the multimeter.

[0015] Compared with the prior art, the utility model provides a resistance testing device, which has the following beneficial effects:

[0016] 1. The utility model uses the fixed cylinders installed on the left and right sides of the upper surface of the constant current power supply to filter the external debris, the filter plate, the motor drives the cooling fan to operate through the top shaft, the coolant is passed into the condensing coil through the liquid inlet pipe, and flows out from the liquid outlet pipe to form a circulation, so as to cool down the sample on the surface of the breathable plate, thereby avoiding the effect of temperature affecting the measurement result during the sample test.

[0017] 2. The utility model has fixed blocks that can be connected on both sides of the upper surface of the air-permeable plate. The first threaded rod penetrates through the upper middle part of the fixed block and can perform threaded rotation movement inside the fixed block. By turning the handle, the extrusion plate is driven to move through the threaded rod, thereby ensuring the stability of the sample during the test. BRIEF DESCRIPTION OF THE DRAWINGS

[0018] Figure 1 It is a schematic diagram of the overall structure of the utility model;

[0019] Figure 2 This is a schematic diagram of the structure of the front cross-sectional view of the utility model;

[0020] Figure 3 It is a schematic diagram of the structure of the heat dissipation mechanism of the utility model.

[0021] Wherein: 1. constant current power supply; 101. support foot; 102. support rod; 103. air permeable plate; 2. heat dissipation mechanism; 201. fixed cylinder; 202. filter plate; 203. motor; 204. rotating shaft; 205. cooling fan; 206. condensing coil; 207. liquid inlet pipe; 208. liquid outlet pipe; 3. fixing mechanism; 301. fixing block; 302. first threaded rod; 303. turning handle; 304. squeezing plate; 4. placing mechanism; 401. telescopic rod; 402. placing block; 403. second threaded rod; 404. fixing plate; 405. multimeter. DETAILED DESCRIPTION

[0022] The following will be combined with the drawings in the embodiments of the utility model to clearly and completely describe the technical solutions in the embodiments of the utility model. Obviously, the described embodiments are only part of the embodiments of the utility model, not all of the embodiments. Based on the embodiments in the utility model, all other embodiments obtained by ordinary technicians in this field without creative work are within the scope of protection of the utility model.

[0023] See also Figure 1-3A resistance testing device comprises a constant current power supply 1, wherein four corners of the lower surface of the constant current power supply 1 are fixedly connected with supporting feet 101, four corners of the upper surface of the constant current power supply 1 are fixedly connected with supporting rods 102, a breathable plate 103 is fixedly connected to the top of the supporting rod 102, a heat dissipation mechanism 2 is arranged above the constant current power supply 1, a fixing mechanism 3 is arranged on the left and right sides above the breathable plate 103, a placing mechanism 4 is arranged on the upper back of the breathable plate 103, the heat dissipation mechanism 2 comprises a fixed cylinder 201, the number of the fixed cylinders 201 is two, the bottoms of the two fixed cylinders 201 are respectively fixedly connected to the left and right sides of the upper surface of the constant current power supply 1, a filter plate 202 is fixedly connected to the upper surface of the fixed cylinder 201, a motor 203 is fixedly installed in the middle of the left and right sides of the upper surface of the constant current power supply 1, a rotating shaft 204 is arranged on the top of the motor 203, a cooling fan 205 is arranged on the top of the rotating shaft 204, a condensing coil 206 is fixedly connected to the lower surface of the breathable plate 103, and the condensing coil A liquid inlet pipe 207 is fixedly connected to the middle part of the left side of 206, and a liquid outlet pipe 208 is fixedly connected to the middle part of the right side of the condensing coil 206. The support leg 101 supports the constant current power supply 1, and the constant current power supply 1 generates and maintains a stable DC current of a set value to ensure that the current does not fluctuate significantly during the entire test period. The tops of the four support rods 102 are respectively vertically connected to the four corners of the upper surface of the constant current power supply 1 to support the air permeable plate 103. The upper surface of the air permeable plate 103 is used to place the sample to be tested while ensuring the flow of the retained sample. The fixed cylinder 201 is sleeved on the outside of the heat dissipation fan 205, and the filter plate 202 can prevent external debris from entering the inside of the fixed cylinder 201. The motor 203 drives the heat dissipation fan 205 to operate through the top rotating shaft 204, blows the airflow to the top of the air permeable plate 103, and passes the cooling medium into the inside of the condensing coil 206 through the liquid inlet pipe 207, and flows out from the liquid outlet pipe 208 to form a cycle, and cools the sample above.

[0024] Specifically, Figure 2 As shown, the fixing mechanism 3 includes a fixing block 301, the number of the fixing blocks 301 is two, the bottoms of the two fixing blocks 301 are respectively fixedly connected to the middle of the left and right sides of the upper surface of the air-permeable plate 103, and a first threaded rod 302 is arranged in the middle of the upper inner part of the fixing block 301, one end of the first threaded rod 302 is fixedly connected to the turning handle 303, and the other end of the first threaded rod 302 is fixedly connected to the extrusion plate 304.

[0025] Through the above technical solution, the bottoms of the two fixed blocks 301 are respectively vertically connected to the middle of the left and right sides of the upper surface of the air-permeable plate 103, and the first threaded rod 302 runs through the interior of the fixed block 301, and can perform threaded rotation movement therein. By turning the handle 303, the extrusion plate 304 is driven to move through the first threaded rod 302 to extrude and fix the sample.

[0026] Specifically, Figure 2 As shown, the placement mechanism 4 includes a telescopic rod 401, the bottom of the telescopic rod 401 is fixedly connected to the middle part of the upper surface of the air-permeable plate 103 near the back side, the top of the telescopic rod 401 is fixedly connected to a placement block 402, a second threaded rod 403 is arranged in the middle part of the right side of the placement block 402, a fixed plate 404 is fixedly connected to the left side of the second threaded rod 403, and a multimeter 405 is arranged above the placement block 402.

[0027] Through the above technical solution, the bottom of the telescopic rod 401 is vertically connected to the middle part of the upper surface of the air-permeable plate 103 near the back side, and the placement block 402 can move up and down through the telescopic rod 401 at the bottom. The second threaded rod 403 passes through the middle part of the right side of the placement block 402, and can perform threaded rotation movement inside it. Rotating the second threaded rod 403 drives the fixed plate 404 to move, and then fixes the multimeter 405, and the resistance value of the sample is tested by the multimeter 405.

[0028] When in use, the operator places the sample to be tested between the two squeezing disks 304 on the upper surface of the air permeable plate 103, rotates the handle 303, drives the squeezing disk 304 to move through the first threaded rod 302, squeezes and fixes the sample, places the multimeter 405 inside the placement block 402, rotates the second threaded rod 403, fixes the multimeter 405 through the fixing disk 404, starts the constant current power supply 1, applies a predetermined steady-state current to the sample, measures and records the resistance value of the sample in the no-current state in advance through the multimeter 405, and when the temperature of the sample is too high during the test process, the cooling medium is passed into the condensing coil 206 through the liquid inlet pipe 207, and the heat dissipation fan 205 is started to control the temperature of the sample above.

[0029] Although embodiments of the present invention have been shown and described, it will be appreciated by those skilled in the art that various changes, modifications, substitutions and variations may be made to the embodiments without departing from the principles and spirit of the present invention, and that the scope of the present invention is defined by the appended claims and their equivalents.

Claims

1. A resistance testing device, comprising a constant current power supply, characterized in that: The four corners of the lower surface of the constant-current power supply are fixedly connected with supporting feet, the four corners of the upper surface of the constant-current power supply are fixedly connected with supporting rods, the top of the supporting rods is fixedly connected with an air-permeable plate, a heat dissipation mechanism is arranged above the constant-current power supply, fixing mechanisms are arranged on the left and right sides above the air-permeable plate, a placing mechanism is arranged on the upper back side of the air-permeable plate, the heat dissipation mechanism comprises a fixed cylinder, the number of the fixed cylinders is two, the bottoms of the two fixed cylinders are respectively fixedly connected to the left and right sides of the upper surface of the constant-current power supply, a filter plate is fixedly connected to the upper surface of the fixed cylinder, a motor is fixedly installed in the middle of the left and right sides of the upper surface of the constant-current power supply, a rotating shaft is arranged on the top of the motor, a cooling fan is arranged on the top of the rotating shaft, a condensing coil is fixedly connected to the lower surface of the air-permeable plate, a liquid inlet pipe is fixedly connected to the middle of the left side of the condensing coil, and a liquid outlet pipe is fixedly connected to the middle of the right side of the condensing coil.

2. A resistance testing device according to claim 1, characterized in that: The fixing mechanism comprises two fixing blocks, the bottoms of the two fixing blocks are respectively fixedly connected to the middle of the left and right sides of the upper surface of the air-permeable plate, and a first threaded rod is arranged in the middle of the upper interior of the fixing block.

3. A resistance testing device according to claim 2, characterized in that: One end of the first threaded rod is fixedly connected to a turning handle, and the other end of the first threaded rod is fixedly connected to a pressing plate.

4. A resistance testing device according to claim 1, characterized in that: The placing mechanism comprises a telescopic rod, the bottom of which is fixedly connected to the middle part of one side of the upper surface of the air-permeable plate close to the back side.

5. A resistance testing device according to claim 4, characterized in that: A placement block is fixedly connected to the top of the telescopic rod, a second threaded rod is arranged at the middle right side of the placement block, and a fixed plate is fixedly connected to the left side of the second threaded rod.

6. A resistance testing device according to claim 5, characterized in that: A multimeter is arranged above the placement block.

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