A stainless steel foil resistance strain gauge detection device

Abstract

The utility model relates to the technical field of precision instrument manufacturing, and disclose a kind of stainless steel foil resistance strain gauge detection device, including tester, the surface of tester is provided with display panel, the surface of tester is provided with operating panel, the outer wall of tester is rotatably installed with portable handle, after the joint of anode wire, cathode wire and signal line is inserted into interface, the joint of anode wire, cathode wire and signal line is fixed in the slot respectively opened in the joint of anode wire, cathode wire and signal line by limiting block at this time, foil can be detected by detection pen resistance subsequently, in the detection process, if joint slack can lead to connection interruption, influence measurement process, when joint is not slack, signal transmission path remains stable, for foil resistance detection this higher precision requirement measurement, stable signal transmission can ensure the accuracy of measurement result.

Description

Technical Field

[0001] This utility model relates to the field of precision instrument manufacturing technology, specifically to a stainless steel foil resistance strain gauge testing device. Background Technology

[0002] A stainless steel foil resistance strain gauge testing device is a specialized instrument for testing the performance parameters of resistance strain gauges attached (or integrated) onto stainless steel foil. Its core function is to accurately measure the change in strain gauge resistance value with strain by simulating the stress (such as tension, compression, bending, etc.) experienced by the strain gauge in actual operation, thereby evaluating the key performance characteristics of the strain gauge.

[0003] Existing technology, such as patent publication number CN212111520U, discloses a resistance testing fixture, including a base, a clamping mechanism, a positioning mechanism, and a test circuit board. The base has a clamping plate, and the clamping mechanism includes a pressure plate and a pressure plate driving assembly. The pressure plate is positioned above the clamping plate. A clamping interval is formed between the pressure plate and the clamping plate for clamping the workpiece. The pressure plate driving assembly drives the pressure plate to move closer to or away from the clamping plate. A positioning block is provided on the pressure plate. The positioning mechanism includes a positioning plate and a positioning plate driving assembly. The positioning plate is located on the side of the clamping plate away from the positioning block. The positioning plate driving assembly drives the positioning plate to move along the height direction of the base. The test circuit board is electrically connected to the workpiece. This utility model's resistance testing fixture can clamp and test resistors.

[0004] While the aforementioned existing technologies have significant beneficial effects, they still have shortcomings:

[0005] In the aforementioned prior art, a positioning plate drive assembly moves the positioning plate upwards. The positioning plate abuts against the side of the resistor, clamping the resistor between the positioning block and the positioning plate. The resistor is electrically connected to the test circuit board for detection. This automatic detection process prevents resistor displacement and improves the pass rate of resistor detection. However, loose connections can lead to unstable signal transmission, potentially causing fluctuations in the measurement signal when measuring foil resistance. These fluctuations can result in inaccurate measurement results, especially for high-precision foil resistance measurements, where even small signal fluctuations can lead to significant measurement errors. Utility Model Content

[0006] To address the shortcomings of existing technologies, this utility model provides a stainless steel foil resistance strain gauge testing device. After inserting the connectors of the positive, negative, and signal wires into the interface, the connectors are fixed in slots opened at the connectors of the positive, negative, and signal wires by the limiting block. Then, the resistance of the foil can be tested by the testing pen.

[0007] To achieve the above objectives, this utility model provides the following technical solution: a stainless steel foil resistance strain gauge testing device, comprising a tester, a display panel on the surface of the tester, an operation panel on the surface of the tester, a handle rotatably mounted on the outer wall of the tester, several interfaces on the surface of the tester, and a protective mechanism, the protective mechanism comprising a hollow frame, the hollow frame being fixedly mounted on the surface of the tester, a pull rod being slidably mounted on the inner wall of the hollow frame, a limit block being fixedly mounted on the bottom of the pull rod, and a first spring being provided between the limit block and the hollow frame.

[0008] Preferably, the front side of the limiting block is set as an inclined surface, and the number of the limiting blocks and the first spring is set to three, and they are arranged in a linear array along one side of the hollow frame.

[0009] Preferably, the inner wall of each interface is provided with connectors for a positive wire, a negative wire, and a signal wire, and the surfaces of the positive wire, the negative wire, and the signal wire are each provided with a slot. The positive wire serves as the current output terminal, directing the excitation current of the detection device into one end of the foil; while the negative wire serves as the current return terminal, guiding the current from the other end of the foil back to the detection device, forming a closed loop.

[0010] Preferably, the non-connector ends of the positive and negative wires are provided with a clamping mechanism, the clamping mechanism including a base plate, and the non-connector ends of the signal wires are provided with a detection pen.

[0011] Preferably, a mounting bracket is fixedly installed on the top of the base plate, and a mounting end of a servo motor is fixedly installed on the surface of the mounting bracket.

[0012] Preferably, a placement frame is fixedly installed at the output end of the servo motor, and a threaded rod is rotatably installed on the inner wall of the placement frame, with a clamping plate threaded onto the circumferential surface of the threaded rod.

[0013] Preferably, the number of the fixing frame, the placement frame, the threaded rod and the clamping plate is set to two, and they are symmetrical to each other along the vertical central axis of the base plate.

[0014] Compared with the prior art, the present invention has the following beneficial effects:

[0015] 1. This utility model uses a protective mechanism. After the connectors of the positive wire, negative wire, and signal wire are inserted into the interface, they are fixed in slots opened at the connectors of the positive wire, negative wire, and signal wire by the limiting block. Then, the resistance of the foil can be detected by the test pen. During the detection process, if the connectors are loose, the connection may be interrupted, affecting the measurement process. When the connectors are not loose, the signal transmission path remains stable. For the foil resistance detection, which has high accuracy requirements, stable signal transmission can ensure the accuracy of the measurement results.

[0016] 2. This utility model uses a clamping mechanism to fix the foil on both sides. The foil is placed on top of the placement frame, and the clamping plate is moved downward by rotating the threaded rod, so that the clamping plate contacts the foil and clamps it. Then, the placement frame is driven to rotate by the output of the servo motor, so that the entire foil rotates. The resistance of stainless steel foil may be anisotropic due to the rolling process and crystal structure. By rotating the foil, the resistance value at different angles can be measured multiple times in multiple ranges, avoiding the one-sidedness of the results caused by measurement in a single direction, and more accurately reflecting the overall resistance characteristics of the foil.

[0017] Other features and advantages of this invention will be set forth in the description which follows, and will be apparent in part from the description, or may be learned by practicing the invention. The objects and other advantages of this invention can be realized and obtained by means of the structures pointed out in the description, claims, and drawings. Attached Figure Description

[0018] Figure 1 This is a schematic diagram of the main structure of the present utility model;

[0019] Figure 2 This is a schematic diagram showing the structure of the operation panel and display panel of this utility model.

[0020] Figure 3 This is a schematic diagram of the protective mechanism structure of this utility model;

[0021] Figure 4 This is a schematic diagram showing the position and structure of the positive and negative electrodes relative to the base plate of this utility model.

[0022] Figure 5 This utility model Figure 4 Enlarged schematic diagram of part A in the middle.

[0023] In the diagram: 1. Tester; 2. Display panel; 3. Operation panel; 4. Handle; 5. Interface; 6. Protective mechanism; 60. Hollow frame; 61. Pull rod; 62. Limit block; 63. Spring No. 1; 64. Positive wire; 65. Negative wire; 66. Signal wire; 7. Clamping mechanism; 70. Base plate; 71. Fixing frame; 72. Servo motor; 73. Placement frame; 74. Threaded rod; 75. Clamping plate. Detailed Implementation

[0024] The technical solutions of the present utility model will be clearly and completely described below with reference to the accompanying drawings of the embodiments. Obviously, the described embodiments are only some embodiments of the present utility model, and not all embodiments. Based on the embodiments of the present utility model, all other embodiments obtained by those skilled in the art without creative effort are within the protection scope of the present utility model.

[0025] Please see Figure 1 - Figure 4 This embodiment of a stainless steel foil resistance strain gauge testing device includes a tester 1, a display panel 2 and an operation panel 3 on the surface of the tester 1, a handle 4 rotatably mounted on the outer wall of the tester 1, and several interfaces 5 on the surface of the tester 1. It also includes a protective mechanism 6, which includes a hollow frame 60 fixedly mounted on the surface of the tester 1. A pull rod 61 is slidably mounted on the inner wall of the hollow frame 60, and a limit block 62 is fixedly mounted at the bottom of the pull rod 61. A first spring 63 is provided between the limit block 62 and the hollow frame 60. The front side of the limit block 62 is set as an inclined surface. The number of limit blocks 62 and first springs 63 is three, arranged linearly along one side of the hollow frame 60. Each interface 5 has a connector for a positive wire 64, a negative wire 65, and a signal wire 66 on its inner wall. Each of the positive wire 64, negative wire 65, and signal wire 66 has a slot. During the testing process, if the connector becomes loose, the connection may be interrupted, affecting the measurement process.

[0026] like Figure 1 - Figure 5As shown, the pump station in this utility model is similar to existing pump stations, such as the resistance detection fixture disclosed in CN212111520U. The main improvement of this utility model is that after the connectors of the positive wire 64, negative wire 65, and signal wire 66 are inserted into the interface 5, the outer walls of the three wires contact the inclined surface of the limiting block 62, causing the limiting block 62 to move upward under force. Simultaneously, the upward movement of the limiting block 62 drives the pull rod 61 to move, compressing the first spring 63. When the slots opened at the connectors of the positive wire 64, negative wire 65, and signal wire 66 overlap with the corresponding limiting blocks 62, the first spring 63... Spring 63 resets, causing pull rod 61 to reset. The movement of pull rod 61 causes limit block 62 to move downward, so that limit block 62 inserts into the slots opened at the connectors of positive wire 64, negative wire 65, and signal wire 66 respectively. At this time, the connectors of positive wire 64, negative wire 65, and signal wire 66 are fixed respectively. Then, the resistance of the foil can be detected by the test pen. During the detection process, if the connector is loose, it may cause the connection to be interrupted, affecting the measurement process. When the connector is not loose, the signal transmission path remains stable. For the foil resistance detection, which has high accuracy requirements, stable signal transmission can ensure the accuracy of the measurement results.

[0027] like Figure 4 and Figure 5 As shown, a clamping mechanism 7 is provided at the non-connector ends of the positive line 64 and the negative line 65. The clamping mechanism 7 includes a base plate 70, and a test pen is provided at the non-connector end of the signal line 66. A fixing frame 71 is fixedly installed on the top of the base plate 70, and the fixing end of the servo motor 72 is fixedly installed on the surface of the fixing frame 71. A placement frame 73 is fixedly installed at the output end of the servo motor 72, and a threaded rod 74 is rotatably installed on the inner wall of the placement frame 73. A clamping plate 75 is threaded on the circumferential surface of the threaded rod 74. The number of fixing frames 71, placement frames 73, threaded rods 74 and clamping plates 75 is set to two, and they are symmetrical about each other along the vertical central axis of the base plate 70, so that the resistance value at different angles can be measured multiple times in multiple ranges.

[0028] like Figure 4 and Figure 5 As shown, when fixing both sides of the foil, the foil is placed on top of the placement frame 73. At this time, the clamping plate 75 is moved downward by rotating the threaded rod 74, and finally the clamping plate 75 contacts the foil and clamps it. Then, the placement frame 73 is driven to rotate by the output of the servo motor 72, so that the entire foil rotates. The resistance of stainless steel foil may be anisotropic due to the rolling process and crystal structure. By rotating the foil, the resistance value at different angles can be measured multiple times in multiple ranges, avoiding the one-sidedness of the results caused by measurement in a single direction, and more accurately reflecting the overall resistance characteristics of the foil.

[0029] Obviously, the above embodiments of this utility model are merely examples for clearly illustrating the present utility model, and are not intended to limit the implementation of the present utility model. Those skilled in the art can make other variations or modifications based on the above description. It is neither necessary nor possible to exhaustively describe all embodiments here. Any modifications, equivalent substitutions, and improvements made within the spirit and principles of this utility model should be included within the protection scope of the claims of this utility model.

Claims

1. A stainless steel foil resistance strain gauge testing device, comprising a testing instrument (1), characterized in that, The surface of the tester (1) is provided with a display panel (2), the surface of the tester (1) is provided with an operation panel (3), the outer wall of the tester (1) is rotatably mounted with a handle (4), the surface of the tester (1) is provided with several interfaces (5), and also includes a protective mechanism (6). The protective mechanism (6) includes a hollow frame (60), which is fixedly installed on the surface of the tester (1). A pull rod (61) is slidably installed on the inner wall of the hollow frame (60). A limit block (62) is fixedly installed at the bottom of the pull rod (61). A first spring (63) is provided between the limit block (62) and the hollow frame (60). The front side of the limiting block (62) is set as an inclined surface, and the number of the limiting block (62) and the first spring (63) is set to three, and they are arranged in a linear array along one side of the hollow frame (60); Each of the interfaces (5) has a connector for a positive wire (64), a negative wire (65) and a signal wire (66) on its inner wall, and a slot is provided on the surface of each of the positive wire (64), the negative wire (65) and the signal wire (66); The non-connector ends of the positive line (64) and the negative line (65) are provided with a clamping mechanism (7), the clamping mechanism (7) includes a base plate (70), and the non-connector end of the signal line (66) is provided with a detection pen; A fixing frame (71) is fixedly installed on the top of the base plate (70), and a fixing end of a servo motor (72) is fixedly installed on the surface of the fixing frame (71). The output end of the servo motor (72) is fixedly mounted with a placement frame (73), and a threaded rod (74) is rotatably mounted on the inner wall of the placement frame (73). A clamping plate (75) is threaded onto the circumferential surface of the threaded rod (74). The number of the fixing frame (71), the placement frame (73), the threaded rod (74) and the clamping plate (75) is set to two, and they are symmetrical to each other along the vertical central axis of the base plate (70).

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