Fatigue testing machine for strain sensor

Abstract

The utility model discloses a strain sensor fatigue testing machine, which relates to the technical field of strain sensors and comprises a testing machine cabinet body, a placing mechanism is arranged at the top of the testing machine cabinet body, and pressure fatigue testing mechanisms are arranged on the left side and the right side of the testing machine cabinet body. A display is arranged on the front side of the pressure fatigue testing mechanism on the left side, the display is fixedly installed on the left side of the testing machine cabinet body, a servo motor is fixedly installed on the top of the inner wall of the testing machine cabinet body, an encoder is arranged on the outer wall of the servo motor, and the placing mechanism comprises a rotating disc. An output shaft of the servo motor penetrates through the top of the testing machine cabinet body and is fixedly connected with the circle center of the bottom of the rotating disc. According to the utility model, through cooperation among the pressure fatigue test mechanism, the servo motor, the encoder, the rotating disc and the strain type sensor placing column, alternate fatigue test of a plurality of strain type sensors can be carried out, and the test efficiency is improved while the test mechanism is not too tired.

Description

TECHNICAL FIELD

[0001] The utility model relates to strain sensor technical field, concretely relates to a strain sensor fatigue testing machine. BACKGROUND

[0002] Strain sensor is the sensor that resistance changes with force, it can convert force, pressure, tension, weight and so on physical quantity into resistance change, thereby measuring these physical quantities. The existing strain sensor can be used for electronic scale, handwriting pen, gravimeter etc. Strain sensor includes sensitive grid, sensitive grid produces different resistance values under external force or deformation, and strain sensor is just to utilize the principle to realize measurement force, and the sensitive grid needs to be polished after strain sensor production, makes sensitive grid under specific pressure to be in preset resistance interval, and strain sensor after calibration also needs to be tested for fatigue, pressure test etc. Therefore, strain sensor needs to be tested frequently.

[0003] Chinese patent document CN220136381U discloses a kind of strain sensor fatigue testing machine, comprising: several strain sensor fixing seat, the upper end surface of the strain sensor fixing seat is provided with strain sensor fixed position, strain sensor fixed position is used to fix strain sensor;Several loading mechanisms, the loading mechanism is set to the upper of the strain sensor fixing seat, the loading mechanism can be directly opposite the strain sensor fixed position and exert pressure;Several acquisition lines, the acquisition line is respectively arranged in each strain sensor fixed position, when the strain sensor is arranged in the strain sensor fixed position, the acquisition line can be connected with the strain sensor;Control system, for controlling the loading mechanism multiple loading to the strain sensor fixed position multiple pressure exertion, and for reading the data of the strain sensor by the acquisition line.There are following problems in prior art:

[0004] Although the above document can realize alternate fatigue test by two loading mechanisms, the test object is always less, and different strain sensors need to be disassembled and reassembled every time, so that the test efficiency of strain sensor is reduced. UTILITY MODEL CONTENT

[0005] The utility model provides a kind of strain sensor fatigue testing machine to solve the problems raised in the above background technique.

[0006] To solve the above technical problems, the technical scheme adopted by the utility model is:

[0007] The utility model provides a kind of strain sensor fatigue testing machine, including test cabinet body, the top of the test cabinet body is equipped with placing mechanism, the left and right sides of the test cabinet body are equipped with pressure fatigue testing mechanism, the front side of left pressure fatigue testing mechanism is equipped with display, the display is fixedly installed on the left side of test cabinet body, the inner wall top of the test cabinet body is fixedly installed with servo motor, the outer wall of the servo motor is equipped with encoder, the placing mechanism includes carousel, the output shaft of the servo motor penetrates to the top of test cabinet body and is fixedly connected with the bottom center of carousel, eight strain sensor placing columns are fixedly installed in the top eccentricity of carousel, signal acquisition box is fixedly installed in the top center of carousel.

[0008] Two the pressure fatigue testing mechanisms include L-shaped support, the horizontal opposite surfaces of two the L-shaped supports are fixedly connected with the left and right sides of test cabinet body, the vertical of two the L-shaped supports is equipped with left and right through lifting adjustment grooves, the inner wall of the lifting adjustment groove is fixedly installed between the upper and lower sides of the lifting adjustment groove sliding rod, the outer wall of the sliding rod is slidably installed with T-shaped sliding block, the opposite ends of two the T-shaped sliding blocks are fixedly installed with adjusting plate, the top of two the adjusting plates is fixedly installed with air cylinder, the output end of two the air cylinders is respectively penetrated to the bottom of two the adjusting plates and is located in the left and right two of eight the strain sensor placing columns.

[0009] The further improvement in the technical scheme of the utility model is that the front and rear two protrusions of the T-shaped sliding block are equipped with left and right through docking holes, the inner ring of the docking hole is provided with a fixed bolt, the vertical opposite surfaces of two the L-shaped supports are evenly equipped with a plurality of adjusting bolt holes on the front and rear sides respectively, the front and rear two the docking holes are respectively left and right aligned with one of the front and rear a plurality of adjusting bolt holes, and the fixed bolt is screwed into the docking hole and the aligned adjusting bolt hole.

[0010] The further improvement in the technical scheme of the utility model is that the top of eight the strain sensor placing columns is equipped with placing groove, the outer wall of the strain sensor placing column is equipped with a through line groove to the inner cavity of placing groove near the side of center, the inner cavity of the placing groove is provided with strain sensor, the outer wall of the strain sensor is connected with lead wire, the other end of the lead wire passes through the line groove and is fixedly installed with plug.

[0011] The further improvement of the utility model technical scheme lies in that: the outer wall annular array of the signal acquisition box is provided with eight signal receiving sockets, eight said plugs are respectively plugged with the eight signal receiving sockets, the inner chamber of the signal acquisition box is provided with a signal sending module, the output end of the eight signal receiving sockets is electrically connected with the output end of the signal sending module, the inner chamber of the display is provided with a signal receiving module, and the output end of the signal sending module can be wirelessly transmitted with the signal receiving module.

[0012] The further improvement of the utility model technical scheme lies in that: the further improvement of the utility model technical scheme lies in that: the eight strain sensors are provided with two spring cabins, two said spring cabins are respectively located at the two sides of the placing groove, two springs are fixedly installed on the inner wall of the spring cabin away from the placing groove, the other end of the two springs is fixedly installed with a sliding plate, the sliding plate is slidably connected with the spring cabin, and two extrusion rods are fixedly installed on the side of the sliding plate away from the spring.

[0013] The further improvement of the utility model technical scheme lies in that: the other end of the extrusion rod penetrates into the inner chamber of the placing groove and is fixedly installed with a circular arc inclined plane clamping plate, the opposite surfaces of the two circular arc inclined plane clamping plates are respectively attached to the two sides of the strain sensor, and the top side of the two circular arc inclined plane clamping plates close to the strain sensor is inclined.

[0014] Due to the adoption of the above technical scheme, the utility model has the following technical progress compared with the prior art:

[0015] 1、The utility model provides a strain sensor fatigue testing machine, which is characterized by the mutual cooperation between the pressure fatigue testing mechanism, the servo motor, the encoder, the turntable and the strain sensor placing column, so that the alternating fatigue test of multiple strain sensors can be carried out, the test efficiency is improved, and the test mechanism is not too tired.

[0016] 2、The utility model provides a strain sensor fatigue testing machine, which is characterized by the mutual cooperation between the spring cabin, the spring, the sliding plate, the extrusion rod, the circular arc inclined plane clamping plate and the placing groove, so that the strain sensor in the placing groove at the top of each strain sensor placing column can be quickly disassembled and assembled, and the replacement is facilitated. BRIEF DESCRIPTION OF DRAWINGS

[0017] Figure 1 It is the overall schematic view of the utility model structure;

[0018] Figure 2 It is the placing mechanism schematic view of the utility model structure;

[0019] Figure 3 It is the pressure fatigue testing mechanism schematic view of the utility model structure;

[0020] Figure 4The utility model discloses a structure's strain sensor placement column schematic drawing.

[0021] Figure 5 The utility model discloses a structure's spring cabin section plane schematic drawing.

[0022] In the drawing: 1, test machine cabinet body;11, servo motor;12, encoder;2, placement mechanism;21, carousel;22, strain sensor placement column;221, placement groove;222, circuit slot;223, strain sensor;224, wire;225, plug;226, spring cabin;2261, spring;2262, sliding plate;2263, extrusion rod;2264, circular arc inclined plane clamping plate;23, signal acquisition box;231, signal receiving socket;232, signal sending module;3, pressure fatigue test mechanism;31, L type support;32, lifting adjusting groove;33, sliding rod;34, T type sliding block;35, adjusting plate;36, air cylinder;37, butt joint hole;38, fixed bolt;39, adjusting bolt hole;4, display. Specific implementation

[0023] In order to make the technical means, creation features, achieve the purpose and effect of the utility model easy to understand, the following specific implementation, further elaborates the utility model.

[0024] As Figure 1 , Figure 2 The utility model provides a kind of strain sensor fatigue test machine, including test machine cabinet body 1, the top of test machine cabinet body 1 is provided with placement mechanism 2, the left and right sides of test machine cabinet body 1 are provided with pressure fatigue test mechanism 3, the front side of left pressure fatigue test mechanism 3 is provided with display 4, display 4 is fixedly installed on the left side of test machine cabinet body 1, the inner wall top of test machine cabinet body 1 is fixedly installed with servo motor 11, the outer wall of servo motor 11 is provided with encoder 12, placement mechanism 2 includes carousel 21, the output shaft of servo motor 11 is penetrated to the top of test machine cabinet body 1 and is fixedly connected with the bottom center of carousel 21, eight strain sensor placement columns 22 are fixedly installed in the top eccentric place annular array of carousel 21, signal acquisition box 23 is fixedly installed in the top center of carousel 21;

[0025] The rotation angle and rotation speed of the servo motor 11 can be accurately controlled by the encoder 12 during use, so that the rotating disc 21 rotates by forty-five degrees each time, and the eight evenly arranged strain sensor placement columns 22 on the top of the rotating disc 21 can be rotated one by one to the below of the pressure fatigue testing mechanism 3, and the fatigue test is started by using the single-side pressure fatigue testing mechanism 3 all the time, and the strain sensor placement column 22 is moved to the below of the pressure fatigue testing mechanism 3 by continuously rotating the rotating disc 21 by forty-five degrees, and the single-side pressure fatigue testing mechanism 3 stops after completing a detection, and the other side of the pressure fatigue testing mechanism 3 is used to continue the test, so that the pressure fatigue testing mechanism 3 that starts the test can rest.

[0026] As shown in Figure 3 The two pressure fatigue testing mechanisms 3 each include an L-shaped support 31, the horizontal opposite faces of the two L-shaped supports 31 are fixedly connected with the left and right sides of the test cabinet body 1, the vertical opposite faces of the two L-shaped supports 31 are each provided with a left-right through lifting adjusting groove 32, the inner walls of the lifting adjusting grooves 32 are fixedly installed with slide rods 33 between the upper and lower sides, the outer walls of the slide rods 33 are slidably installed with T-shaped sliding blocks 34, the opposite ends of the two T-shaped sliding blocks 34 are each fixedly installed with an adjusting plate 35, the top of each of the two adjusting plates 35 is fixedly installed with a pneumatic cylinder 36, the output ends of the two pneumatic cylinders 36 are respectively penetrated through the bottoms of the two adjusting plates 35 and located above the left and right two of the eight strain sensor placement columns 22, the front and rear protrusions of the T-shaped sliding block 34 are each provided with a left-right through butt joint hole 37, the inner circle of the butt joint hole 37 is provided with a fixed bolt 38, the vertical opposite faces of the two L-shaped supports 31 are each uniformly provided with a plurality of adjusting bolt holes 39 on the front and rear sides, the front and rear butt joint holes 37 are respectively left-right aligned with one of the front and rear adjusting bolt holes 39, and the fixed bolt 38 is threadedly connected with the aligned adjusting bolt hole 39 by penetrating through the butt joint hole 37;

[0027] During detection, the output end of the pneumatic cylinder 36 on the top of the adjusting plate 35 can be repeatedly pressed downward to load, and after the fixed bolt 38 is disassembled, the adjusting plate 35 can be moved downward by sliding the T-shaped sliding block 34 in the lifting adjusting groove 32 on the outer wall of the slide rod 33, so as to shorten the distance between the output end of the pneumatic cylinder 36 and the strain sensor placement column 22, and then the butt joint hole 37 is aligned with one of the adjusting bolt holes 39, and the T-shaped sliding block 34 is limited again by using the fixed bolt 38 to threadedly connect with the butt joint hole 37, so that the distance between the strain sensor placement column 22 and the output end of the pneumatic cylinder 36 is reduced, and the stroke of each loading of the pneumatic cylinder 36 is reduced, and multiple loadings can be completed faster.

[0028] As shown in Figure 4As shown, the eight strain sensor placement columns 22 are provided with placement grooves 221 at the top, and the outer wall of the strain sensor placement column 22 is provided with a line groove 222 penetrating to the inner cavity of the placement groove 221 near the side of the center of the placement mechanism 2, the inner cavity of the placement groove 221 is provided with a strain sensor 223, the outer wall of the strain sensor 223 is connected with a wire 224, the other end of the wire 224 passes through the line groove 222 and is fixedly installed with a plug 225, the outer wall of the signal acquisition box 23 is annularly arranged with eight signal receiving sockets 231, the eight plugs 225 are respectively plugged with the eight signal receiving sockets 231, the inner cavity of the signal acquisition box 23 is provided with a signal sending module 232, the output end of the eight signal receiving sockets 231 is electrically connected with the output end of the signal sending module 232, the inner cavity of the display 4 is provided with a signal receiving module, the output end of the signal sending module 232 and the signal receiving module can be wirelessly transmitted, the signal sending module 232 and the signal receiving module both adopt rs485 wireless transmission modules, can wirelessly transmit data electrical signals, and have low power consumption, which is prior art and will not be described in detail here;

[0029] When loaded, the thickness of the strain sensor 223 in the placement groove 221 at the top of the strain sensor placement column 22 is greater than the depth of the placement groove 221, so the cylinder 36 can directly contact the top of the strain sensor 223 for loading, and the loading data received by the strain sensor 223 can be transmitted to the signal receiving module in the display 4 through the signal sending module 232 by connecting the wire 224 passing through the line groove 222 with the signal receiving socket 231 through the plug 225, the display 4 is connected to the control system, and is used for displaying the data of the strain sensor 223, when the strain sensor 223 needs to be replaced, the plug 225 can be directly pulled out.

[0030] As shown in the figure, Figure 5 As shown, the eight strain sensor placement columns 22 are provided with two spring cabins 226, the two spring cabins 226 are respectively located on the two sides of the placement groove 221, two springs 2261 are fixedly installed on the inner wall of the spring cabin 226 away from the placement groove 221, the other end of the two springs 2261 is fixedly installed with a sliding plate 2262, the sliding plate 2262 is slidingly connected with the spring cabin 226, two extrusion rods 2263 are fixedly installed on the side of the sliding plate 2262 away from the spring 2261, the other end of the extrusion rod 2263 penetrates to the inner cavity of the placement groove 221 and is fixedly installed with a circular arc inclined plane clamp plate 2264, the opposite surfaces of the two circular arc inclined plane clamp plates 2264 are respectively attached to the two sides of the strain sensor 223, and the top of the two circular arc inclined plane clamp plates 2264 is inclined to the side close to the strain sensor 223;

[0031] When installing the strain sensor 223, directly press the strain sensor 223 into the two arc chamfer clamping plates 2264 opposite faces in the placement groove 221, that is, the arc chamfer clamping plates 2264 top chamfer can be used to complete the clamping, and the arc chamfer clamping plates 2264 are extruded, so that the arc chamfer clamping plates 2264 use the sliding plate 2262 at the other end of the extrusion rod 2263 to compress the spring 2261 in the spring cabin 226 cavity, and the arc edges of the two arc chamfer clamping plates 2264 can be clamped to the strain sensor 223 by the elastic force of the spring 2261, so as to keep the stability of the strain sensor 223 during testing, and the strain sensor 223 can be directly pulled out upward for disassembly.

[0032] The working principle of the strain sensor fatigue tester will be described below.

[0033] As Figures 1-5As shown, the encoder 12 can accurately control the rotation angle and speed of the servo motor 11 during use, thereby controlling the rotation of the turntable 21 by forty-five degrees each time, allowing the eight evenly installed strain sensor placement columns 22 on the top of the turntable 21 to be rotated one by one under the pressure fatigue testing mechanism 3, and starting the fatigue test with the single-sided pressure fatigue testing mechanism 3. By continuously rotating the turntable 21 by forty-five degrees, each strain sensor placement column 22 can be moved under the pressure fatigue testing mechanism 3. After the single-sided pressure fatigue testing mechanism 3 completes a cycle, it can be stopped and the other side of the pressure fatigue testing mechanism 3 can continue the test, allowing the pressure fatigue testing mechanism 3 to rest. During testing, the cylinder 36 on the top of the adjusting plate 35 can be used to drive the output end to repeatedly load downward, and after the fixing bolts 38 are removed, the adjusting plate 35 can be moved downward by sliding the T-shaped slider 34 in the lifting adjusting groove 32 on the outer wall of the slide rod 33, thereby shortening the distance between the output end of the cylinder 36 and the strain sensor placement column 22. Then, by aligning the docking hole 37 with one of the adjusting bolt holes 39 and using the fixing bolts 38 to thread through the docking hole 37, the T-shaped slider 34 can be limited. Finally, by reducing the distance between the strain sensor placement column 22 and the output end of the cylinder 36, the stroke of the cylinder 36 during each load can be reduced, allowing multiple loads to be completed more quickly. During loading, the strain sensor 223 in the placement slot 221 on the top of the strain sensor placement column 22 has a thickness greater than the depth of the placement slot 221, so the cylinder 36 can directly contact the top of the strain sensor 223 for loading. At the same time, the loading data received by the strain sensor 223 can be transmitted to the signal receiving module in the display 4 through the signal transmission module 232 by connecting the wire 224 through the wiring slot 222 and the plug 225 to the signal receiving socket 231, thereby facilitating the monitoring of test data. When the strain sensor 223 needs to be replaced, the plug 225 can be pulled out directly. When installing the strain sensor 223, the strain sensor 223 can be aligned with the two arc-shaped clamping plates 2264 in the placement slot 221 and pressed down to be clamped, and the arc-shaped clamping plates 2264 can be clamped and extruded to compress the spring 2261 in the spring compartment 226 using the sliding plate 2262 at the other end of the extrusion rod 2263, thereby clamping the strain sensor 223 with the arc edges of the two arc-shaped clamping plates 2264, maintaining the stability of the strain sensor 223 during testing. When disassembling, the strain sensor 223 can be pulled out upward directly.

[0034] The utility model is described in detail above, but some modifications or improvements can be made on the basis of the utility model, which is obvious to the general technical personnel in the technical field. Therefore, the modifications or improvements without departing from the utility model's ideological spirit are within the utility model's protection scope.

Claims

1. A strain gauge sensor fatigue testing machine comprising a testing cabinet body (1), characterized in that: The top of the test cabinet body (1) is provided with a placing mechanism (2), the left and right sides of the test cabinet body (1) are provided with pressure fatigue test mechanisms (3), the front side of the left pressure fatigue test mechanism (3) is provided with a display (4), the display (4) is fixedly installed on the left side of the test cabinet body (1), a servo motor (11) is fixedly installed on the inner wall top of the test cabinet body (1), an encoder (12) is arranged on the outer wall of the servo motor (11), the placing mechanism (2) comprises a turntable (21), the output shaft of the servo motor (11) penetrates through the top of the test cabinet body (1) and is fixedly connected with the bottom center of the turntable (21), eight strain sensor placing columns (22) are fixedly installed in an annular array on the top eccentric position of the turntable (21), and a signal acquisition box (23) is fixedly installed on the top center of the turntable (21). Both of the pressure fatigue test mechanisms (3) comprise an L-shaped support (31), the horizontal sides of the two L-shaped supports (31) are fixedly connected with the left and right sides of the test cabinet body (1) respectively, lifting adjusting grooves (32) penetrating through left and right are formed in the vertical sides of the two L-shaped supports (31), slide rods (33) are fixedly installed between the inner wall upper and lower sides of the lifting adjusting grooves (32), T-shaped sliding blocks (34) are slidingly installed on the outer wall of the slide rods (33), adjusting plates (35) are fixedly installed on the opposite ends of the two T-shaped sliding blocks (34), air cylinders (36) are fixedly installed on the top of the two adjusting plates (35), and the output ends of the two air cylinders (36) penetrate through the bottom of the two adjusting plates (35) and are located above the left and right two of the eight strain sensor placing columns (22).

2. A strain gauge sensor fatigue testing machine as claimed in claim 1, wherein: Both of the front and rear protrusions of the T-shaped sliding block (34) are provided with left and right penetrating butt joints (37), the inner ring of the butt joint (37) is provided with a fixing bolt (38), a plurality of adjusting bolt holes (39) are uniformly formed on the front and rear sides of the opposite vertical sides of the two L-shaped supports (31), the front and rear butt joints (37) are respectively aligned with one of the front and rear adjusting bolt holes (39) left and right, and the fixing bolt (38) is in threaded connection with the aligned adjusting bolt hole (39) penetrating the butt joint (37).

3. The strain gauge sensor fatigue testing machine of claim 1, wherein: The top of each of the eight strain sensor placing columns (22) is provided with a placing groove (221), a circuit groove (222) penetrating into the inner cavity of the placing groove (221) is formed on the outer wall of the strain sensor placing column (22) near the side of the center of the placing mechanism (2), a strain sensor (223) is arranged in the inner cavity of the placing groove (221), a wire (224) is connected to the outer wall of the strain sensor (223), and the other end of the wire (224) penetrates through the circuit groove (222) and is fixedly installed with a plug (225).

4. A strain gauge sensor fatigue testing machine as claimed in claim 3, wherein: The outer wall annular array of the signal collection box (23) is provided with eight signal receiving sockets (231), eight said plugs (225) are respectively plugged with eight signal receiving sockets (231), the inner cavity of the signal collection box (23) is provided with a signal sending module (232), the output end of eight said signal receiving sockets (231) is electrically connected with the output end of the signal sending module (232), the inner cavity of the display (4) is provided with a signal receiving module, the output end of the signal sending module (232) can be wirelessly transmitted with the signal receiving module.

5. The strain gauge sensor fatigue testing machine of claim 1, wherein: Two spring cabins (226) are arranged in each of the eight said strain sensor placing columns (22), two said spring cabins (226) are respectively arranged on the two sides of the placing groove (221), two springs (2261) are fixedly installed on the inner wall of the spring cabin (226) away from the placing groove (221), the other end of the two said springs (2261) is fixedly installed with a sliding plate (2262), the sliding plate (2262) is slidingly connected with the spring cabin (226), two extrusion rods (2263) are fixedly installed on the side of the sliding plate (2262) away from the spring (2261).

6. A strain gauge sensor fatigue testing machine as claimed in claim 5, wherein: The other end of the extrusion rod (2263) penetrates into the inner cavity of the placing groove (221) and is fixedly installed with a circular arc inclined clamping plate (2264), the opposite surfaces of the two said circular arc inclined clamping plates (2264) are respectively attached to the two sides of the strain sensor (223), and the top side of the two said circular arc inclined clamping plates (2264) close to the strain sensor (223) is inclined.

Images