CN220399537U - Temperature coefficient of resistance test equipment - Google Patents
Temperature coefficient of resistance test equipment Download PDFInfo
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- CN220399537U CN220399537U CN202321434910.1U CN202321434910U CN220399537U CN 220399537 U CN220399537 U CN 220399537U CN 202321434910 U CN202321434910 U CN 202321434910U CN 220399537 U CN220399537 U CN 220399537U
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- 238000012360 testing method Methods 0.000 title claims abstract description 41
- 239000000523 sample Substances 0.000 claims abstract description 36
- 239000000463 material Substances 0.000 claims abstract description 31
- 238000001514 detection method Methods 0.000 claims abstract description 22
- 230000005540 biological transmission Effects 0.000 claims description 44
- 230000007246 mechanism Effects 0.000 claims description 32
- 238000010438 heat treatment Methods 0.000 claims description 28
- 238000007599 discharging Methods 0.000 claims description 5
- 230000007613 environmental effect Effects 0.000 claims description 5
- 238000000034 method Methods 0.000 claims description 5
- 230000008859 change Effects 0.000 description 7
- 238000005485 electric heating Methods 0.000 description 7
- 230000032258 transport Effects 0.000 description 7
- 239000011810 insulating material Substances 0.000 description 2
- 230000008569 process Effects 0.000 description 2
- 238000003780 insertion Methods 0.000 description 1
- 230000037431 insertion Effects 0.000 description 1
- 238000005259 measurement Methods 0.000 description 1
- 239000002184 metal Substances 0.000 description 1
- 238000012986 modification Methods 0.000 description 1
- 230000004048 modification Effects 0.000 description 1
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- 238000012545 processing Methods 0.000 description 1
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- 238000013522 software testing Methods 0.000 description 1
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Abstract
The utility model discloses a resistance temperature coefficient testing device which comprises a bearing piece, a detection assembly and a temperature control assembly, wherein the bearing piece is provided with a plurality of material tanks, and each material tank is used for accommodating one product, so that the plurality of products can be tested at the same time, the testing efficiency is improved, and the batch detection of the resistance products is realized. The detection assembly is used for acquiring real-time resistance values of various products and comprises a support provided with a plurality of groups of probes, the plurality of groups of probes are arranged in one-to-one correspondence with the material tanks, so that when the support and the bearing piece are assembled in place, the probes of each group are respectively inserted into the corresponding material tanks and are electrically connected with the corresponding products, accurate fixing of the various products can be realized, the real-time resistance values of the various products can be automatically acquired, manual replacement or adjustment of samples is not needed, and the artificial interference and errors are reduced.
Description
Technical Field
The utility model relates to the technical field of resistance testing, in particular to a temperature coefficient of resistance testing device.
Background
The Temperature Coefficient of Resistance (TCR) refers to the ratio of the resistance of a resistor over temperature in ppm/°c. Devices for measuring temperature coefficients of resistance generally require applying a certain temperature gradient to a sample and measuring its resistance value and the change in temperature value.
The existing temperature coefficient of resistance test equipment can only test a single sample, so that the efficiency is low, and measurement errors are easy to cause.
Disclosure of Invention
Therefore, the utility model aims to provide the temperature coefficient of resistance testing equipment which can detect the temperature coefficient of resistance of products in batches and has higher detection precision.
In order to solve the above technical problems, the present utility model provides a temperature coefficient of resistance testing apparatus for testing temperature coefficients of resistance of a plurality of products, the temperature coefficient of resistance testing apparatus comprising:
the bearing piece is provided with a plurality of material tanks, and each material tank is used for accommodating one product;
the detection assembly is used for acquiring real-time resistance values of the products and comprises a bracket provided with a plurality of groups of probes, and the groups of probes are arranged in one-to-one correspondence with the material tanks, so that when the bracket and the bearing piece are assembled in place, the probes are respectively inserted into the corresponding material tanks and are electrically connected with the corresponding products; the method comprises the steps of,
the temperature control assembly comprises a temperature control box with a temperature control chamber, wherein the temperature control chamber is used for accommodating the bearing piece, so that the environmental temperature of a plurality of products borne by the bearing piece can be adjusted.
In an embodiment, a plurality of the material grooves are arranged in an array on the carrier, and a plurality of groups of the probes are arranged in an array corresponding to the plurality of material grooves.
In an embodiment, the upper sides of the material tanks are respectively arranged in an open mode, the temperature coefficient of resistance testing equipment further comprises a mounting seat and an upper driving mechanism and a lower driving mechanism which are arranged on the mounting seat, the bearing piece is arranged on the mounting seat, the support is movably arranged on the mounting seat along the up-down direction, and the upper driving mechanism and the lower driving mechanism are in driving connection with the support, so that the support has a downward stroke from the upper side of the bearing piece to the position where the bearing piece is assembled.
In an embodiment, the temperature coefficient of resistance test device further comprises a rack and a transmission assembly arranged on the rack, wherein the rack is provided with a first station and a second station which are sequentially arranged in a transmission direction, and the transmission direction extends along a horizontal direction;
the temperature control box is arranged on the frame, extends between the first station and the second station, and is provided with a feed inlet and a discharge outlet which are communicated with the temperature control chamber, the feed inlet faces the first station, and the discharge outlet faces the second station;
the mounting seat is movably arranged on the frame along the transmission direction, and the transmission assembly is in driving connection with the mounting seat and is used for driving the mounting seat to enter the temperature control chamber from the feeding hole and be sent out from the temperature control chamber.
In an embodiment, the temperature control assembly further comprises a heating element having a plurality of temperature zones distributed sequentially along the transport direction within the temperature control chamber, the heating element being arranged such that the ambient temperature of the temperature zones presents an increasing distribution.
In an embodiment, the heating element includes an electric heating wire wound around the outer periphery of the temperature control chamber, and the electric heating wire is gradually densely arranged in the temperature control chamber along the transmission direction.
In an embodiment, the heating element includes a plurality of groups of heating wires, the plurality of groups of heating wires are wound around the peripheries of the plurality of temperature areas in a one-to-one correspondence manner, and each group of heating wires has an independent loop.
In an embodiment, the transmission assembly includes motor, drive shaft, driven shaft and transmission band, the drive shaft is located first station, the driven shaft is located the second station, the motor with the drive shaft drive is connected, so as to drive the drive shaft rotates, the transmission band is located around the drive shaft with the driven shaft periphery, and follows the transmission direction extends the setting, it has to bear on the transmission band the mount pad.
In an embodiment, the temperature coefficient testing device further comprises a feeding mechanism arranged at the first station and a discharging sorting mechanism arranged at the second station, wherein the feeding mechanism is used for placing the sucked products in corresponding material tanks, and the discharging sorting mechanism is used for sorting the products which are detected to be qualified in the bearing piece into sorting boxes.
In an embodiment, the detection assembly further comprises a main controller arranged on the frame and a transmission line connected with the main controller and the probes, wherein the main controller is arranged outside the temperature control chamber, a wire groove extending along the transmission direction is formed in the upper side of the temperature control box, and the transmission line penetrates through the wire groove.
The technical scheme provided by the utility model has the following advantages:
the temperature coefficient testing equipment provided by the utility model comprises the bearing piece, the detection component and the temperature control component, wherein the bearing piece is provided with a plurality of material tanks, and each material tank is used for accommodating one product, so that the plurality of products can be tested at the same time, the testing efficiency is improved, and the batch detection of the resistance products is realized. The detection assembly is used for acquiring real-time resistance values of various products and comprises a support provided with a plurality of groups of probes, the plurality of groups of probes are arranged in one-to-one correspondence with the material tanks, so that when the support and the bearing piece are assembled in place, the probes of each group are respectively inserted into the corresponding material tanks and are electrically connected with the corresponding products, accurate fixing of the various products can be realized, the real-time resistance values of the various products can be automatically acquired, manual replacement or adjustment of samples is not needed, and the artificial interference and errors are reduced. The temperature control assembly comprises a temperature control box with a temperature control chamber, wherein the temperature control chamber is used for accommodating the bearing piece, so that the environmental temperature of a plurality of products borne by the bearing piece can be adjusted, different temperature gradients can be set according to requirements, the temperature stability is maintained, and the testing precision is improved.
Drawings
In order to more clearly illustrate the embodiments of the present utility model or the technical solutions in the prior art, the drawings that are needed in the description of the embodiments or the prior art will be briefly described, and it is obvious that the drawings in the description below are some embodiments of the present utility model, and other drawings can be obtained according to the drawings without inventive effort for a person skilled in the art.
Fig. 1 is a schematic perspective view of an embodiment of a temperature coefficient of resistance testing apparatus according to the present utility model.
Reference numerals illustrate:
1-a temperature coefficient of resistance test device; 2-a carrier; 21-a trough; 3-probe; 4-a temperature control assembly; 41-a temperature control box; 42-a feed inlet; 43-a discharge hole; 44-wire grooves; 5-a feeding mechanism; 6-blanking and sorting mechanisms; 61-sorting boxes; 100-a first station; 200-a second station.
Detailed Description
The following description of the embodiments of the present utility model will be made more apparent and fully hereinafter with reference to the accompanying drawings, in which embodiments of the utility model are shown, some, but not all embodiments of the utility model
Examples of the part. The utility model will be described in detail hereinafter with reference to the drawings in conjunction with embodiments. It should be noted that, without conflict, the embodiments of the present utility model and features of the embodiments may be combined with each other.
It should be noted that the terms "first," "second," and the like in the description and the claims of the present utility model and the above figures are used for distinguishing between similar objects and not necessarily for describing a particular sequential or chronological order.
Referring to fig. 1, the present utility model provides a temperature coefficient of resistance testing apparatus 1 for testing temperature coefficients of resistance of a plurality of products, which includes a carrier 2, a detecting component and a temperature control component 4. The carrier 2 is formed with a plurality of pockets 21, each pocket 21 being for receiving one product.
In the present embodiment, the shape and material of the carrier 2 are not limited, and preferably, the carrier 2 is a tray-like structure made of an insulating material, and a plurality of slots 21 are formed thereon. Each of said pockets 21 is adapted to receive a product, preferably a plurality of pockets 21 arranged in an array on the carrier 2 for facilitating the placement and removal of the product and for identifying product location information.
The shape of each of the tanks 21 is not limited, and it is preferable that the upper side of each of the tanks 21 is provided with an opening, respectively, so as to facilitate the insertion or removal of the product. A certain number of spring plates or clamping pieces and the like can be arranged in each trough 21 so as to realize reliable fixation between the product and the bearing piece 2, thereby ensuring good contact between the probe 3 of the detection assembly and the product and ensuring detection precision.
The detection assembly is used for acquiring real-time resistance values of various products, and specifically comprises a main controller, a transmission line and a bracket provided with a plurality of groups of probes 3 (not all of which are shown in the figure, only the structure of a single probe 3 is shown). The shape of the holder is not limited, and preferably the holder is made of an insulating material, on which a plurality of sets of probes 3 are fixed, each set of probes 3 including two or more metal needles. The plurality of groups of probes 3 are arranged in one-to-one correspondence with the plurality of material tanks 21, so that when the bracket and the bearing piece 2 are assembled in place, each group of probes 3 is respectively inserted into each corresponding material tank 21 and is electrically connected with each corresponding product. Preferably, when the plurality of tanks 21 are arranged in an array on the carrier 2, the plurality of sets of probes 3 are arranged in an array on the support corresponding to the plurality of tanks 21. When the material grooves 21 are arranged in an upper open mode, the plurality of groups of probes 3 are correspondingly arranged on the lower side of the support, the support is arranged on the bearing piece 2 in a covering mode to realize the assembly with the bearing piece 2, and at the moment, each group of probes 3 are downwards inserted into each corresponding material groove 21 in a one-to-one correspondence mode and are correspondingly and electrically connected with products in each material groove 21. The main controller is an electronic device, which can be a computer or a microprocessor, and is used for controlling the work of the detection assembly and receiving, processing and displaying the resistance data of each product. The transmission line is a cable and signal transmission device, and is used for connecting the main controller with the plurality of probes 3 and transmitting electric signals, the main controller obtains the position information of each product through the transmission line, and supplies current to the products and obtains pressure difference, so that the real-time resistance information of each product is obtained.
The temperature control assembly 4 includes a temperature control box 41 having a temperature control chamber and a heating member. The temperature control box 41 is a box body, and a temperature control chamber is formed inside the temperature control box for accommodating the carrier 2, so that the environmental temperature of a plurality of products carried by the carrier 2 can be adjusted.
The temperature control box 41 has a feed port 42 and a discharge port 43 which are communicated with the temperature control chamber, the feed port 42 is directed to the first station 100, and the discharge port 43 is directed to the second station 200. The heating element is an electric heating device for heating the air in the temperature control chamber and maintaining the constant or variable temperature. In this embodiment, the heating element includes an electric heating wire or an electric heating tube wound around the periphery of the temperature control chamber, and is configured to heat the temperature control chamber according to a preset program, so that the temperature of the product in the temperature control chamber changes in a gradient manner, and the detecting component detects the change of the resistance value, thereby obtaining the temperature coefficient of resistance of each product in each trough 21. When the temperature coefficient of resistance of a certain product is not qualified, the master controller also identifies and records the position of the unqualified product in the carrier 2.
The utility model provides a resistance temperature coefficient test equipment 1 can test a plurality of products simultaneously, has improved efficiency of software testing, realizes detecting the batch of resistance product. The probe 3 and the trough 21 are matched to realize accurate fixation of each product, and the real-time resistance value of each product is automatically obtained, so that the manual replacement or adjustment of a sample is not needed, and the artificial interference and errors are reduced. The temperature control component 4 can set different temperature gradients according to the requirements, and maintain the temperature stability, so that the testing precision is improved.
On the basis of the above embodiment, in order to realize the assembly of the bracket and the carrier 2, the temperature coefficient of resistance testing device 1 further includes a mounting base and an up-down driving mechanism disposed on the mounting base. The structure of the mounting seat is not limited, and the mounting seat is provided with a bearing piece 2 and a bracket, wherein the bearing piece 2 and the mounting seat are connected in a relatively movable way, the bracket is movably arranged on the mounting seat along the up-down direction, and the up-down driving mechanism can comprise a device capable of moving up and down in a telescopic way, such as a hydraulic cylinder or an air cylinder, and the like, and is connected with the bracket in a driving way and is used for driving the bracket to be pressed down from the upper part of the bearing piece 2 to be assembled with the bearing piece 2 or lifted up from the bearing piece 2. In this way, the support is provided with a pressing stroke from the upper part of the bearing piece 2 to the position assembled with the bearing piece 2, automatic electric connection of the probe 3 and the product in the trough 21 is realized, and in the pressing stroke, the product in the trough 21 and the bearing piece 2 are further driven to be fixed in place, so that good contact between the probe 3 and the product is ensured, and the detection precision is ensured.
Based on the above embodiment, the temperature coefficient of resistance test apparatus 1 further includes a rack and a transport assembly (not shown in the drawings) provided to the rack, the rack being a base for carrying and mounting the respective components of the temperature coefficient of resistance test apparatus 1, and having a first station 100 and a second station 200 disposed in order in a transport direction of the transport assembly. In this embodiment, the transmission direction extends substantially horizontally. The temperature control box 41 is arranged on the frame, extends between the first station 100 and the second station 200, and is provided with a feed port 42 and a discharge port 43 which are communicated with the temperature control chamber, wherein the feed port 42 faces the first station 100, and the discharge port 43 faces the second station 200. The mount pad is movably located the frame along the transmission direction, and transmission subassembly is connected with the mount pad drive for drive mount pad gets into the control by temperature change room from feed inlet 42, and sends out in the control by temperature change room. In a preferred embodiment, the main controller is arranged outside the temperature control chamber, the upper side of the temperature control box 41 is provided with a wire groove 44 extending along the transmission direction, and the transmission line is arranged in the wire groove 44 in a penetrating manner. So, the support and the multiunit probe 3 that sets up on it can be along with the mount pad together removal, and the transmission line that links to each other with the support can not cause to shelter from and twine, reduces the clamping stagnation phenomenon in the transmission module transportation process.
The specific type of the transmission assembly is not limited, so long as the carrier 2 carrying the product can be automatically sent into and removed from the temperature control chamber, thereby realizing automatic detection of the product and having high detection efficiency. In a preferred embodiment, the transmission mechanism includes a motor, a drive shaft, a driven shaft, and a transmission belt. The driving shaft is arranged at the first station 100, and the driven shaft is arranged at the second station 200. The motor is in driving connection with the driving shaft so as to drive the driving shaft to rotate. The transmission belt is wound on the peripheries of the driving shaft and the driven shaft and extends along the transmission direction. The conveyor belt is used for bearing the mounting seat and conveying the mounting seat along the conveying direction.
In order to achieve a gradient control of the product temperature, in a preferred embodiment the temperature control box 41 is arranged in cooperation with the transport assembly, in particular a plurality of temperature zones are distributed in the temperature control chamber in succession along the transport direction, the heating elements being arranged such that the ambient temperature of each temperature zone presents an increasing distribution. For example, the first temperature zone at the inlet 42 is 20℃and the last temperature zone at the outlet 43 is 120℃with the intermediate temperature zones increasing by 10 ℃. Therefore, the products are sequentially conveyed to each temperature control area through the control transmission assembly, the gradient control on the temperature of the products can be realized by staying for a preset time, and the temperature coefficient of resistance of the products can be obtained by measuring the change of the resistance value of the products in the process. The operation is simple and easy to control, heating time is omitted, and detection efficiency is improved.
There are various ways to achieve the increased distribution of the ambient temperature in each temperature region, and in one embodiment, the heating element includes an electric heating wire wound around the periphery of the temperature control chamber, and the electric heating wire is gradually densely arranged in the temperature control chamber 41 along the transmission direction. In this way, the ambient temperatures of the plurality of temperature areas are sequentially increased from the feed inlet 42 to the discharge outlet 43, so that the setting of the temperature gradient required for detection is realized.
In another embodiment, the heating element includes a plurality of groups of heating wires, the plurality of groups of heating wires are wound around the peripheries of the plurality of temperature areas in a one-to-one correspondence manner, and each group of heating wires has an independent loop. In this way, the temperature of each temperature region can be independently controlled, so that the ambient temperatures of a plurality of temperature regions are sequentially increased from the feed inlet 42 to the discharge outlet 43, and the setting of the temperature gradient required for detection is realized.
Further, referring to fig. 1, the temperature coefficient of resistance apparatus further includes a loading mechanism 5 and a discharging and sorting mechanism 6, wherein the loading mechanism 5 has a device such as a suction nozzle capable of moving up and down and sucking the product, and is disposed at the first station 100 and provides a suction source through a vacuum pump or the like. The feeding mechanism 5 is used for placing the sucked product in the corresponding trough 21. The blanking sort mechanism 6 has a device such as a suction nozzle that can move up and down and suck the product, is provided at the second station 200, and provides a suction source by a vacuum pump or the like. The blanking and sorting mechanism 6 is used for sucking the tested products in the carrier 2 and sorting the products according to different categories, and specifically, the products which are qualified in detection can be moved into the sorting box 61.
The application method of one embodiment of the temperature coefficient of resistance test equipment 1 provided by the utility model is as follows:
firstly, a feeding mechanism 5 moves a plurality of products to be detected into corresponding material tanks 21 one by one at a first station 100;
meanwhile, starting a heating element to heat the air in the temperature control chamber, and setting different temperature gradients according to the requirements;
then, starting an upper driving mechanism and a lower driving mechanism to press down the bracket to be assembled with the bearing piece 2 in place, so that the probe 3 is electrically connected with a product in the trough 21, and the main controller acquires the resistance value of the product in real time;
then, the motor at the first station 100 drives the conveyor belt to convey the mounting seat to the feed port 42, and the mounting seat is conveyed into the temperature control chamber through the feed port 42;
then, the conveying belt sequentially conveys the bearing seats to each temperature area, the products stay in each temperature area for a preset time period, the environmental temperature gradient change of the products is realized, meanwhile, the main controller acquires the resistance value change of each product in real time, so that the resistance temperature coefficient of each product is obtained, and whether the products are qualified or not is judged according to the detection result;
finally, the conveyor belt transports the carrier 2 to the second station 200, and the upper drive mechanism drives the rack to move upwards to expose the products, and the blanking and sorting mechanism 6 sorts the qualified products into the sorting boxes 61.
It will be apparent that the embodiments described above are merely some, but not all, embodiments of the utility model. Based on the embodiments of the present utility model, those skilled in the art may make other different changes or modifications without making any creative effort, which shall fall within the protection scope of the present utility model.
Claims (10)
1. A temperature coefficient of resistance test apparatus for testing temperature coefficients of resistance of a plurality of products, the temperature coefficient of resistance test apparatus comprising:
the bearing piece is provided with a plurality of material tanks, and each material tank is used for accommodating one product;
the detection assembly is used for acquiring real-time resistance values of the products and comprises a bracket provided with a plurality of groups of probes, and the groups of probes are arranged in one-to-one correspondence with the material tanks, so that when the bracket and the bearing piece are assembled in place, the probes are respectively inserted into the corresponding material tanks and are electrically connected with the corresponding products; the method comprises the steps of,
the temperature control assembly comprises a temperature control box with a temperature control chamber, wherein the temperature control chamber is used for accommodating the bearing piece, so that the environmental temperature of a plurality of products borne by the bearing piece can be adjusted.
2. The temperature coefficient of resistance testing apparatus according to claim 1, wherein a plurality of the material slots are arranged in an array on the carrier, and wherein a plurality of the sets of the probes are arranged in an array corresponding to a plurality of the material slots.
3. The temperature coefficient of resistance test equipment according to claim 1, wherein the upper sides of the material tanks are respectively arranged in an open mode, the temperature coefficient of resistance test equipment further comprises a mounting seat and an upper driving mechanism and a lower driving mechanism which are arranged on the mounting seat, the bearing piece is arranged on the mounting seat, the support is movably arranged on the mounting seat along the up-down direction, and the upper driving mechanism and the lower driving mechanism are in driving connection with the support, so that the support has a downward stroke from the upper side of the bearing piece to the position where the bearing piece is assembled.
4. The temperature coefficient of resistance test apparatus according to claim 3, wherein the temperature coefficient of resistance test apparatus further comprises a frame and a transmission assembly provided to the frame, the frame having a first station and a second station arranged in sequence in a transmission direction, the transmission direction extending in a horizontal direction;
the temperature control box is arranged on the frame, extends between the first station and the second station, and is provided with a feed inlet and a discharge outlet which are communicated with the temperature control chamber, the feed inlet faces the first station, and the discharge outlet faces the second station;
the mounting seat is movably arranged on the frame along the transmission direction, and the transmission assembly is in driving connection with the mounting seat and is used for driving the mounting seat to enter the temperature control chamber from the feeding hole and be sent out from the temperature control chamber.
5. The temperature coefficient of resistance testing apparatus according to claim 4, wherein the temperature control assembly further comprises a heating member having a plurality of temperature zones distributed sequentially along the transport direction within the temperature control chamber, the heating member being configured such that an ambient temperature of the temperature zones presents an increasing distribution.
6. The temperature coefficient of resistance test apparatus according to claim 5, wherein the heating member includes heating wires wound around an outer periphery of the temperature control chamber, the heating wires being disposed in a gradually dense manner in the temperature control chamber along the conveying direction.
7. The apparatus according to claim 5, wherein the heating member comprises a plurality of groups of heating wires, the plurality of groups of heating wires are wound around the outer circumferences of the plurality of temperature areas in one-to-one correspondence, and each group of heating wires has an independent loop.
8. The temperature coefficient of resistance test apparatus according to claim 4, wherein the transmission assembly comprises a motor, a driving shaft, a driven shaft and a transmission belt, the driving shaft is arranged at the first station, the driven shaft is arranged at the second station, the motor is in driving connection with the driving shaft to drive the driving shaft to rotate, the transmission belt is wound around the driving shaft and the driven shaft, extends along the transmission direction, and carries the mounting seat on the transmission belt.
9. The temperature coefficient of resistance test apparatus according to claim 4, further comprising a loading mechanism disposed at the first station and a discharging and sorting mechanism disposed at the second station, wherein the loading mechanism is configured to place the sucked product in a corresponding material slot, and the discharging and sorting mechanism is configured to sort the product detected as being acceptable in the carrier into a sorting box.
10. The device of claim 4, wherein the detecting unit further comprises a main controller provided on the frame, and a transmission line connecting the main controller and the plurality of probes, the main controller is provided outside the temperature control chamber, a wire groove extending along the transmission direction is provided on an upper side of the temperature control chamber, and the transmission line is provided through the wire groove.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN202321434910.1U CN220399537U (en) | 2023-06-07 | 2023-06-07 | Temperature coefficient of resistance test equipment |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN202321434910.1U CN220399537U (en) | 2023-06-07 | 2023-06-07 | Temperature coefficient of resistance test equipment |
Publications (1)
| Publication Number | Publication Date |
|---|---|
| CN220399537U true CN220399537U (en) | 2024-01-26 |
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Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| CN202321434910.1U Active CN220399537U (en) | 2023-06-07 | 2023-06-07 | Temperature coefficient of resistance test equipment |
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| Country | Link |
|---|---|
| CN (1) | CN220399537U (en) |
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2023
- 2023-06-07 CN CN202321434910.1U patent/CN220399537U/en active Active
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