Resistor disc detection device

Abstract

The invention belongs to the technical field of resistor disc detection, and particularly relates to a resistor disc detection device, which comprises a box body, a heating device is arranged in the box body, a first conductive column and a second conductive column are fixed on the top surface of the box body, and both the first conductive column and the second conductive column penetrate through the box body; a drawer is arranged on the box body, a fixing device for fixing a resistor disc is arranged in the drawer, the fixing device comprises a first conductive clamping block and a second conductive clamping block, the first conductive clamping block is arranged corresponding to the first conductive column, and the second conductive clamping block is arranged corresponding to the second conductive column; the fixing device can move up and down, and a control device for controlling the fixing device to move up and down is arranged in the box body. The resistor disc detection device provided by the invention can be used for screening resistor discs with relatively good thermal stability.

Description

Technical Field

[0001] This invention belongs to the field of resistor detection technology, and specifically relates to a resistor detection device. Background Technology

[0002] After the resistor is manufactured, its performance needs to be tested, among which resistance testing is of paramount importance. Currently, resistance testing is only conducted at room temperature. This testing method can only detect whether the resistance value is accurate at room temperature. In actual use, the circuit in which the resistor is used often generates heat, causing the ambient temperature to rise. The rise in temperature can affect the resistance value. Under normal circumstances, this effect is negligible. However, for some precision devices, it is necessary to select resistors with good thermal stability, and the current testing equipment cannot meet this requirement. Summary of the Invention

[0003] In view of the problems existing in the prior art, the purpose of the present invention is to provide a resistor sheet detection device to solve the above-mentioned technical problems.

[0004] To achieve the above-mentioned objectives, the present invention provides the following technical solution: A resistor detection device includes a housing, a heating device disposed inside the housing, a first conductive post and a second conductive post fixed on the top surface of the housing, both of which penetrate the housing; a drawer is provided on the housing, and a fixing device for fixing the resistor is disposed inside the drawer; the fixing device includes a first conductive block and a second conductive block, the first conductive block being disposed corresponding to the first conductive post and the second conductive block being disposed corresponding to the second conductive post; the fixing device is capable of moving up and down, and a control device for controlling the up and down movement of the fixing device is disposed inside the housing.

[0005] Preferably, the drawer includes a sliding part and a blocking part, and a sealing ring is sleeved at the connection between the sliding part and the blocking part; a receiving groove is provided on the sliding part, and the fixing device is located in the receiving groove; a slide rail is provided in the box body below the sliding part, and the sliding part is slidably connected to the slide rail; in the closed state of the drawer, the receiving groove is located in the box body, and the sealing ring is located outside the box body and fits against the box body.

[0006] Preferably, the fixing device further includes a base plate, the first conductive block is fixed on the base plate, the second conductive block is slidably disposed on the base plate, the first conductive block is provided with a first groove, the second conductive block is provided with a second groove, the first groove and the second groove are disposed opposite to each other; a blocking block is fixed on the side of the base plate opposite to the second groove, and a spring is disposed between the blocking block and the second conductive block; the base plate is made of insulating material.

[0007] Preferably, a first column and a second column are fixed to the bottom surface of the receiving groove, the first column and the second column penetrate the bottom plate and are slidably connected to the bottom plate; the first column is located on the side of the first conductive block opposite to the first groove, and the second column is located on the side of the blocking block opposite to the spring.

[0008] Preferably, the top surface of the first column is flush with or lower than the top surface of the receiving groove; the top surface of the first column is flush with or lower than the top surface of the receiving groove; in the original state, the top surface of the fixing device is flush with or lower than the top surface of the receiving groove.

[0009] Preferably, magnetic blocks are provided on the base plate at positions on both sides of the first and second conductive blocks, and the top surface of the magnetic blocks is flush with or lower than the top surfaces of the first and second conductive blocks; an electromagnet is installed on the top surface of the housing corresponding to the position of the magnetic blocks.

[0010] Preferably, the magnetic block is an iron block.

[0011] Preferably, the bottom surface of the housing is provided with a lifting device, and the bottom surface of the receiving slot is provided with a through hole for the power output end of the lifting device to pass through.

[0012] Preferably, the lifting device is a linear motion motor or a hydraulic cylinder.

[0013] Preferably, the top surface of the housing is provided with an exhaust pipe and a blower pipe. The exhaust pipe is connected to the interior of the housing. A first valve is installed on the exhaust pipe, and a second valve is installed on the blower pipe. The top surface of the housing is provided with a vent hole that is connected to the interior of the blower pipe. A filter screen is installed on the housing at the position corresponding to the vent hole. The bottom of the blower pipe covers the filter screen and is detachably connected to the housing.

[0014] The resistance testing device provided by this invention is used by pulling out the drawer to expose the fixing device, then fixing the resistance sheet to be tested onto the fixing device, and then pushing the drawer back to its original position. At this time, the fixing device is controlled to move upward until the first conductive block contacts the first conductive post, and the second conductive block contacts the second conductive post. At this time, the first and second conductive posts are connected to a resistance testing instrument to detect the resistance value of the resistance sheet at room temperature. Then, the fixing device is controlled to move downward, separating the first conductive block from the first conductive post, and the second conductive block from the second conductive post. At this time, the heating device is activated, and after the temperature inside the chamber rises, the fixing device is controlled to move upward again. Then, the resistance testing instrument is used to detect the resistance value of the resistance sheet at high temperature. The smaller the difference between the resistance value of the resistance sheet at high temperature and the resistance value at room temperature, the better the thermal stability, thus allowing for the screening of resistance sheets with better thermal stability. Attached Figure Description

[0015] Figure 1 This shows one of the internal structural schematic diagrams of a resistor detection device according to an embodiment of the present invention; Figure 2 A schematic diagram of the installation structure of the fixing device in an embodiment of the present invention is shown; Figure 3 This is a second schematic diagram of the internal structure of a resistor detection device according to an embodiment of the present invention; The attached figures are labeled as follows: Box 10, Heating device 11, First conductive post 12, Second conductive post 13, Drawer 14, First conductive block 15, Second conductive block 16, Base plate 17, First groove 18, Second groove 19, Blocking block 20, Spring 21, First column 22, Second column 23, Magnetic block 24, Electromagnet 25, Lifting device 26, Through hole 27, Exhaust pipe 28, Blower pipe 29, First valve 30, Second valve 31, Vent hole 32, Filter screen 33; Sliding part 14-1, blocking part 14-2, sealing ring 14-3, receiving groove 14-4, slide rail 14-5. Detailed Implementation

[0016] To make the objectives, technical solutions, and advantages of this invention clearer, the invention will be further described below with reference to the accompanying drawings and specific embodiments. It should be understood that the specific embodiments described herein are merely illustrative and not intended to limit the invention. All other embodiments obtained by those skilled in the art based on the embodiments of this invention without inventive effort are within the scope of protection of this invention.

[0017] Example: This invention provides a resistor detection device, see [link to example]. Figure 1The device includes a housing 10, inside which a heating device 11 is installed. A first conductive post 12 and a second conductive post 13 are fixed to the top surface of the housing, both penetrating the housing. A drawer 14 is provided on the housing, and a fixing device for fixing a resistor is provided inside the drawer. The fixing device includes a first conductive latch 15 and a second conductive latch 16, the first conductive latch corresponding to the first conductive post and the second latch corresponding to the second conductive post. In this embodiment, the drawer includes a sliding part 14-1 and a blocking part 14-2, with a sealing ring 14-3 fitted at the connection between the sliding part and the blocking part. A receiving groove 14-4 is provided on the sliding part, and the fixing device is located within the receiving groove. A slide rail 14-5 is provided below the sliding part inside the housing, and the sliding part is slidably connected to the slide rail. In the closed state of the drawer, the receiving groove is located inside the housing, and the sealing ring is located outside the housing and fits against the housing. See also... Figure 2 The fixing device further includes a base plate 17, on which the first conductive block is fixed, and the second conductive block is slidably disposed on the base plate. The first conductive block has a first groove 18, and the second conductive block has a second groove 19, which are opposite to each other. A blocking block 20 is fixed on the base plate on the side of the second base plate opposite to the second groove, and a spring 21 is disposed between the blocking block and the second conductive block. The base plate is made of insulating material. A first column 22 and a second column 23 are fixed to the bottom surface of the receiving groove, penetrating the base plate and slidably connected to it. The first column is located on the side of the first conductive block opposite to the first groove. On one side, the second column is located on the side of the blocking block facing away from the spring; the top surface of the first column is flush with or slightly lower than the top surface of the receiving groove; the top surface of the first column is flush with or slightly lower than the top surface of the receiving groove; in the original state, the top surface of the fixing device is flush with or slightly lower than the top surface of the receiving groove; magnetic blocks 24 are provided on the bottom plate on both sides of the first and second conductive blocks. Generally, iron blocks can be used for the magnetic blocks. The top surface of the magnetic blocks is flush with or slightly lower than the top surfaces of the first and second conductive blocks; an electromagnet 25 is installed on the top surface of the housing corresponding to the position of the magnetic blocks.

[0018] When using the above-mentioned resistance element detection device, please refer to... Figure 1Pull the drawer out to expose the fixing device, then squeeze the second conductive block to compress the spring. Place one end of the resistor to be tested against the first groove and the other end against the second groove, then release the second conductive block. Under the action of the spring, the second conductive block enters the second groove and is clamped by the first and second conductive blocks. Then push the drawer back to its original position. At this time, energize the electromagnet, and the bottom plate will move up along the first and second columns until the first conductive block contacts the first conductive column, and the second conductive block contacts the second conductive column. At this time, the first and second conductive columns are connected to the resistance measuring instrument 34, which can detect the resistance value of the resistor at room temperature. Then de-energize the electromagnet, and it returns to its original position under the action of gravity. The first conductive block and the first conductive column separate, and the second conductive block and the second conductive column separate. At this time, start the heating device. After the temperature inside the box rises, start the electromagnet again. Then, a resistance meter is used to detect the resistance value of the resistor at high temperature. The smaller the difference between the resistance value at high temperature and the resistance value at room temperature, the better the thermal stability. This allows for the selection of resistors with better thermal stability. In this embodiment, an electric heating device can be used for heating. Generally, a temperature controller can also be installed on the enclosure, connecting the temperature controller to the electric heating device to control the temperature inside the enclosure. A multimeter or resistance meter can be used for resistance detection. The connection between the meter needle and the corresponding conductive post can be a plug-in method to facilitate timely installation and removal of the meter needle, preventing prolonged contact between the meter needle and the corresponding conductive post, especially during the heating process inside the enclosure. Of course, the part of the conductive post exposed outside the enclosure dissipates heat relatively quickly, so its temperature is lower than that of the part inside the enclosure, which is beneficial for the resistance meter to detect the resistor.

[0019] In a preferred embodiment, the top surface of the housing is provided with an exhaust pipe 28 and a blower pipe 29. The exhaust pipe is connected to the interior of the housing, and a first valve 30 is installed on the exhaust pipe, while a second valve 31 is installed on the blower pipe. The top surface of the housing is provided with a vent 32 that is connected to the interior of the blower pipe. A filter screen 33 is installed on the housing at a position corresponding to the vent screen. The bottom of the blower pipe covers the filter screen and is detachably connected to the housing. When in use, connect the blower pipe to the blower and the extraction pipe to the extraction device, such as a vacuum device. Remove the blower or extraction device when not in use. To use, first open the second valve and close the first valve. Connect and start the blower. Then pull out the drawer to secure the resistance element and push the drawer back to its original position. During this process, the airflow, after being filtered, enters the chamber and flows outwards along the drawer, effectively preventing external dust from entering the chamber. When the drawer is pushed back until the sealing ring contacts the chamber, close the blower and the second valve. Connect the extraction pipe to the extraction device, open the first valve, and start the extraction device. This creates negative pressure inside the chamber. Under this negative pressure, the blocking part and the sealing ring are firmly adhered to the chamber, ensuring that the first and second conductive blocks maintain their corresponding conductive posts and forming a sealed space inside the chamber. Then close the extraction device and the first valve to test the resistance element. After testing, if rapid cooling is needed, open the second and first valves and start the extraction device to exchange air inside the chamber with outside air.

[0020] See Figure 3 In the above embodiments, the electromagnet and magnetic block can also be replaced by the following structure: a lifting device 26 is provided on the bottom surface of the housing, and a through hole 27 is provided on the bottom surface of the receiving groove for the power output end of the lifting device to pass through. The lifting device can be a linear motion motor or a hydraulic cylinder, etc., so that controlling the lifting device to rise and fall can also achieve the purpose of contacting and separating the conductive block from the corresponding conductive post. Of course, other structures can also be used, as long as they can achieve the function of controlling the fixed device to move up and down; no specific limitation is made here.

[0021] It should be noted that the terms "one embodiment," "embodiment," "exemplary embodiment," "some embodiments," etc., mentioned in the specification indicate that the described embodiment may include a specific feature, structure, or characteristic, but not every embodiment necessarily includes that specific feature, structure, or characteristic. Furthermore, such phrases do not necessarily refer to the same embodiment. Moreover, when a specific feature, structure, or characteristic is described in connection with an embodiment, implementing such a feature, structure, or characteristic in conjunction with other embodiments, whether explicitly described or not, is within the knowledge scope of those skilled in the art.

[0022] It should be readily understood that “on,” “above,” and “on top of” in this disclosure should be interpreted in the broadest manner, such that “on” means not only “directly on something” but also “on something” with an intermediate feature or layer therebetween, and that “above” or “on top of” means not only “on something” but also “on something” without an intermediate feature or layer therebetween (i.e., directly on something).

[0023] Furthermore, for ease of explanation, spatially relative terms such as "below," "below," "under," "above," and "above" may be used to describe the relationship of one element or feature relative to other elements or features as shown in the figures. Spatially relative terms are intended to encompass different orientations of the device in use or operation other than those shown in the figures. The device may have other orientations (rotated 90 degrees or in other orientations), and the spatially relative descriptive terms used herein may be interpreted accordingly.

[0024] It should be noted that, in this document, relational terms such as "first" and "second" are used merely to distinguish one entity or operation from another, and do not necessarily require or imply any such actual relationship or order between these entities or operations. Furthermore, the terms "comprising," "including," or any other variations thereof are intended to cover non-exclusive inclusion, such that a process, method, article, or apparatus that comprises a list of elements includes not only those elements but also other elements not expressly listed, or elements inherent to such a process, method, article, or apparatus. Without further limitations, an element defined by the phrase "comprising one..." does not exclude the presence of other identical elements in the process, method, article, or apparatus that includes said element.

[0025] Although embodiments of the invention have been shown and described, it will be understood by those skilled in the art that various changes, modifications, substitutions and alterations can be made to these embodiments without departing from the principles and spirit of the invention, the scope of which is defined by the appended claims and their equivalents.

Claims

1. A resistor detection device, characterized in that, Includes a housing (10), a heating device (11) is provided inside the housing, and a first conductive post (12) and a second conductive post (13) are fixed on the top surface of the housing, both of which penetrate the housing. The box is provided with a drawer (14), and the drawer is provided with a fixing device for fixing the resistor sheet. The fixing device includes a first conductive block (15) and a second conductive block (16). The first conductive block is provided corresponding to the first conductive post, and the second block is provided corresponding to the second conductive post. The fixing device is capable of moving up and down, and a control device for controlling the up and down movement of the fixing device is provided inside the box.

2. The resistor detection device according to claim 1, characterized in that, The drawer includes a sliding part (14-1) and a blocking part (14-2), and a sealing ring (14-3) is fitted at the connection between the sliding part and the blocking part. The sliding part is provided with a receiving groove (14-4), and the fixing device is located in the receiving groove; A slide rail (14-5) is provided below the sliding part inside the box, and the sliding part is slidably connected to the slide rail; When the drawer is closed, the receiving slot is located inside the box, and the sealing ring is located outside the box and fits against the box.

3. The resistor detection device according to claim 2, characterized in that, The fixing device also includes a base plate (17), the first conductive block is fixed on the base plate, the second conductive block is slidably disposed on the base plate, the first conductive block is provided with a first groove (18), the second conductive block is provided with a second groove (19), and the first groove and the second groove are disposed opposite to each other; A blocking block (20) is fixed on the side of the second base plate opposite to the second groove, and a spring (21) is provided between the blocking block and the second conductive block. The base plate is made of insulating material.

4. The resistor detection device according to claim 3, characterized in that, The bottom surface of the receiving groove is fixed with a first column (22) and a second column (23), the first column and the second column penetrate the bottom plate and are slidably connected to the bottom plate; The first post is located on the side of the first conductive block opposite to the first groove, and the second post is located on the side of the blocking block opposite to the spring.

5. The resistor detection device according to claim 4, characterized in that, The top surface of the first column is flush with or lower than the top surface of the receiving groove; The top surface of the first column is flush with or lower than the top surface of the receiving groove; In its original state, the top surface of the fixing device is flush with or lower than the top surface of the receiving groove.

6. The resistor detection device according to claim 4, characterized in that, Magnetic blocks (24) are provided on the base plate at positions on both sides of the first conductive block and the second conductive block. The top surface of the magnetic blocks is flush with or lower than the top surface of the first conductive block and the second conductive block. An electromagnet (25) is installed on the top surface of the box corresponding to the position of the magnetic block.

7. The resistor detection device according to claim 6, characterized in that, The magnetic block is an iron block.

8. The resistor detection device according to claim 4, characterized in that, The bottom surface of the box is provided with a lifting device (26), and the bottom surface of the receiving groove is provided with a through hole (27) for the power output end of the lifting device to pass through.

9. A resistor detection device according to claim 8, characterized in that, The lifting device is a linear motion motor or a hydraulic cylinder.

10. A resistor detection device according to claim 4, characterized in that, The top surface of the box is provided with an exhaust pipe (28) and a blower pipe (29). The exhaust pipe is connected to the inside of the box. A first valve (30) is installed on the exhaust pipe, and a second valve (31) is installed on the blower pipe. The top surface of the housing is provided with a vent (32) that communicates with the inside of the blower pipe. A filter screen (33) is installed on the housing at the position corresponding to the vent. The bottom of the blower pipe covers the filter screen and is detachably connected to the housing.

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