Tensile sample measuring device

Abstract

The utility model discloses a tensile sample measuring device which comprises a base, a fixing assembly, a length measuring assembly and a laser scanning detection assembly, and a placing groove is formed in the base and used for placing a metal tensile sample; the fixing assembly is arranged on the base in a sliding manner, is positioned above the placing groove and is used for fixing the metal tensile sample; the length measuring assembly is arranged on the base, and the length direction of the length measuring assembly is parallel to the length direction of the placing groove; the laser scanning detection assembly is arranged on the base in a sliding mode, the laser emitting path of the laser scanning detection assembly is perpendicular to the length direction of the containing groove, and the laser scanning detection assembly is used for detecting the distance between the surface of the metal tensile sample and a receiver on the laser scanning detection assembly. The elongation after fracture and the section shrinkage condition of the metal tensile sample can be measured at the same time, and the detection efficiency is improved.

Description

Technical Field

[0001] The utility model relates to the technical field of mechanical performance testing, in particular to a tensile specimen measuring device. Background Art

[0002] In the tensile test of metal specimens, the elongation and area reduction of the metal specimens after fracture are measured. Elongation is one of the most important test items for mechanical properties testing in material research and development and quality inspection, and is an important parameter reflecting the ductility performance index of metal materials. Area reduction is a performance index to measure the plastic deformation ability of materials. The larger the value, the better the plasticity of the material.

[0003] There are two main existing measurement methods: one is to manually splice the broken specimens and then measure them; the other is to fix them on the device and then measure them. The existing measurement devices cannot simultaneously measure the length of the metal tensile specimen after breaking and the contraction length of the cross section. The two parameters usually need to be tested separately, which has low detection efficiency.

[0004] Therefore, the existing technology needs to be improved and developed. Utility Model Content

[0005] In view of the above-mentioned defects of the prior art, the purpose of the utility model is to provide a tensile specimen measuring device to solve the technical problem that the existing tensile specimen measuring device cannot detect multiple parameters at the same time.

[0006] The technical solutions adopted by the utility model to solve the above problems are as follows:

[0007] A tensile specimen measuring device, comprising: a base, wherein the base is provided with a placement groove for placing the tensile specimen;

[0008] A fixing component, slidably disposed on the base, the fixing component is located above the placement groove, and is used to fix the tensile specimen in the placement groove;

[0009] A length measuring component is arranged on the base, the length direction of the length measuring component is arranged parallel to the length direction of the placement groove, and is used to measure the length of the gauge section on the tensile specimen;

[0010] A laser scanning detection component can be slidably arranged on the base. The laser scanning detection component is arranged just above the placement groove and is used to detect the distance from the surface of the tensile sample to the receiver of the laser scanning detection component.

[0011] Optionally, the length measurement component includes:

[0012] A caliper body is slidably connected to the digital display module, and the caliper body is arranged parallel to the placement groove;

[0013] A scale pointer, one end of which is connected to the caliper body and the other end of which extends toward the placement groove;

[0014] The digital display module is arranged at one end of the base. A distance measuring sensor is arranged inside the digital display module. The distance measuring sensor is used to detect the sliding distance of the caliper body.

[0015] Optionally, the length measurement component further comprises a length scale bar, wherein the length scale bar is arranged on the upper end surface of the base and is arranged parallel to the length direction of the placement groove.

[0016] Optionally, the base also includes a slide groove, the length direction of which is parallel to the length direction of the placement groove; a first sliding part is provided on the fixing component, and a second sliding part is provided on the laser scanning detection component, and the first sliding part and the second sliding part are both provided in the slide groove.

[0017] Optionally, the laser scanning detection component includes:

[0018] A displacement sensor is located directly above the placement groove, wherein a transmitter and the receiver are provided in the displacement sensor, and a projection of a light beam emission path of the transmitter on the placement groove coincides with a central axis of the placement groove;

[0019] A bracket, wherein the bottom end of the bracket is provided with the second sliding portion, and the top end of the bracket is provided with a mounting groove for mounting the displacement sensor.

[0020] Optionally, the fixing component includes:

[0021] A fixed slider, the fixed slider comprising a support portion and legs respectively arranged vertically at two ends of the support portion, the support portion is provided with a locking hole, and the first sliding portion is provided at one end of the leg away from the support portion;

[0022] A locking piece is disposed in the locking hole, and one end of the locking piece facing the first sliding portion abuts against the tensile test specimen.

[0023] Optionally, two fixed sliders are provided, and the laser scanning detection component is located between the two fixed sliders.

[0024] Optionally, the fixing assembly further includes a fixing piece, the support leg is provided with a penetrating fixing hole, the fixing piece is arranged in the fixing hole, and one end of the fixing piece extending into the fixing hole abuts against the base.

[0025] Optionally, the base includes a main body and a limiting portion, the placement groove and the slide groove are arranged on the main body, the limiting portion is arranged at one end of the main body close to the digital display module, the height of the limiting portion is greater than the height of the main body, and the digital display module is arranged on the limiting portion.

[0026] Optionally, the fixed slider is in a plate shape, and a thickness direction of the fixed slider is arranged parallel to a length direction of the placement groove.

[0027] In summary, the beneficial effects of the utility model are:

[0028] The utility model discloses a tensile specimen measuring device, comprising a base, a fixing assembly, a length measuring assembly and a laser scanning detection assembly. The base is provided with a placement groove for placing the metal tensile specimen. The utility model provides the length measuring assembly and the laser scanning detection assembly to achieve simultaneous measurement of the post-fracture elongation length and cross-sectional contraction of the metal tensile specimen, thereby effectively reducing the measurement process and improving the detection efficiency. BRIEF DESCRIPTION OF THE DRAWINGS

[0029] In order to more clearly illustrate the embodiments of the utility model or the technical solutions in the prior art, the drawings required for use in the embodiments or the prior art will be briefly introduced below. Obviously, the drawings described below are only some embodiments recorded in the utility model. For ordinary technicians in this field, other drawings can be obtained based on these drawings without paying creative work.

[0030] Figure 1 It is a structural schematic diagram of a tensile specimen measuring device of the utility model;

[0031] Figure 2 It is a front view of the tensile specimen measuring device in the utility model;

[0032] Figure 3 It is a top view of the tensile specimen measuring device in the utility model;

[0033] Figure 4 It is a cross-sectional view of the tensile specimen measuring device in the utility model.

[0034] Wherein: 100, base; 110, main body; 111, placement groove; 112, slide groove; 120, limit part; 200, fixing component; 210, fixed slider; 211, first sliding part; 220, locking piece; 230, fixing piece; 240, limit block; 300, length measurement component; 310, digital display module; 320, length scale bar; 330, caliper body; 340, scale pointer; 400, laser scanning detection component; 410, displacement sensor; 420, bracket; 421, second sliding part; 500, metal tensile test specimen. DETAILED DESCRIPTION

[0035] In order to enable those skilled in the art to better understand the solution of the utility model, the following will be combined with the drawings in the embodiments of the utility model to clearly and completely describe the technical solutions in the embodiments of the utility model. Obviously, the described embodiments are only part of the embodiments of the utility model, not all of the embodiments. Based on the embodiments of the utility model, other embodiments obtained by ordinary technicians in the field without creative work are all within the scope of protection of the utility model.

[0036] See also Figure 1 , Figure 2 and Figure 3 In one embodiment of the utility model, a tensile specimen measuring device is disclosed, including a base 100, on which a placement groove 111 for placing the tensile specimen is provided; a fixing component 200, which can be slidably arranged on the base 100, and the fixing component 200 is located above the placement groove 111, and is used to fix the tensile specimen in the placement groove 111; a length measuring component 300, which is arranged on the base 100, and the length direction of the length measuring component 300 is arranged parallel to the length direction of the placement groove 111, and is used to measure the length of the gauge section on the tensile specimen; a laser scanning detection component 400, which can be slidably arranged on the base 100, and the laser scanning detection component 400 is arranged directly above the placement groove 111, and is used to detect the distance from the surface of the tensile specimen to the receiver of the laser scanning detection component 400.

[0037] The tensile test specimen in this embodiment is a metal test specimen after stretching, and the gauge length section refers to a reference length section for measuring elongation on the metal tensile test specimen 500. This gauge length section is two distances artificially marked on the test specimen before the tensile test, which serves as a reference for measuring elongation during stretching.

[0038] The length measurement component 300 in this embodiment refers to a device that can be used to measure the length of the metal tensile specimen 500. It can have its own zeroing function and can measure a certain distance. The laser scanning detection component 400 refers to a device that integrates a laser transmitter, a scanner and a receiver. The device uses the emission, reflection and reception of a laser beam to measure the distance to an object. Specifically, the laser scanning component emits a laser beam and controls the laser beam to scan within a specific area. When the laser beam is irradiated onto the surface of an object, part of the laser will be reflected back and captured by the receiver. By analyzing the time difference between the emission and reception of the laser beam, the distance between the laser scanning component and the object can be determined.

[0039] The placement groove 111 in this embodiment may be a circular groove, a V-shaped groove or a square groove, and the placement groove 111 of different shapes may be provided according to the shape of the metal tensile specimen 500 .

[0040] Specifically, when it is necessary to detect the length of the metal tensile specimen 500, the metal tensile specimen 500 is placed in the placement groove 111, and then the scale pointer 340 of the length measurement component 300 is moved to the starting point of the gauge section, and then the length measurement component 300 is cleared, and then the scale pointer 340 is moved to the end point of the gauge section, and the reading on the length measurement component 300 is read at this time to realize the length detection of the metal tensile specimen 500.

[0041] When it is necessary to detect the cross-sectional shrinkage of the metal tensile specimen 500, the laser scanning assembly is moved to the starting position of the gauge length section, and then scanned. At the same time, the laser scanning assembly is moved from the starting position of the gauge length section to the end position of the gauge length section, and the scanning of the gauge length section on the metal tensile specimen 500 is completed. The distance between the specimen surface and the receiver is read through the matching system, so as to infer the shrinkage of the specimen after stretching and calculate the cross-sectional shrinkage rate. The shrinkage of each part can also be understood by scanning the entire specimen.

[0042] This embodiment provides a length measurement component 300 and a laser scanning detection component 400 to simultaneously measure the elongation length and cross-sectional contraction of the metal tensile specimen 500, thereby effectively reducing the measurement process and improving the detection efficiency.

[0043] In this embodiment, the length measuring component 300 includes: a caliper body 330, which is slidably connected to the digital display module 310, and the caliper body 330 is arranged parallel to the placement groove 111; a scale pointer 340, one end of which is connected to the caliper body 330 and the other end extends toward the placement groove 111; a digital display module 310, which is arranged at one end of the base 100, the digital display module 310 is connected to the caliper body 330, and a distance sensor is provided in the digital display module 310, and the distance sensor is used to detect the sliding distance of the caliper body 330.

[0044] The digital display module in this embodiment is provided with a distance sensor and a digital display system. The distance sensor may be a grating sensor, a magnetic grating sensor or a capacitive grating sensor, etc. The distance sensor can accurately sense the movement of the scale pointer 340 and convert it into an electrical signal, and then directly display the length value through the digital display system, making the reading of the measurement result more intuitive and convenient.

[0045] When it is necessary to detect a certain distance of the metal tensile test specimen 500, the scale pointer 340 is moved to the starting point to be measured, and then the digital display module 310 is cleared, and then the scale pointer 340 is moved along the caliper body 330 to the end point to be measured, and the reading on the digital display module 310 is read to achieve the length measurement.

[0046] In this embodiment, the length measuring component 300 further includes a length scale bar 320 . The length scale bar 320 is disposed on the upper end surface of the base 100 and is parallel to the length direction of the placement groove 111 .

[0047] The caliper body 330 in this embodiment may also be provided with a scale to facilitate quick determination of the size range of the object from the front of the detection device.

[0048] It should be noted that, although the measured length can be directly read on the digital display module 310, the length scale bar 320 can be set to roughly measure through the scale to quickly determine the size range of the object, or when the digital display system fails or the battery is exhausted, the operator can still roughly measure through the scale. At the same time, the scale can also be used to calibrate the digital display system to ensure the accuracy of the measurement result.

[0049] See also Figure 1 and Figure 4 The base 100 also includes a slide groove 112, the length direction of which is parallel to the length direction of the placement groove 111; the fixing component 200 is provided with a first sliding part 211, and the laser scanning detection component 400 is provided with a second sliding part 421, and the first sliding part 211 and the second sliding part 421 are both arranged in the slide groove 112.

[0050] In this embodiment, the placement groove 111 is arranged at the top of the base 100, extending from one end of the base 100 to the other end of the base 100; two slide grooves 112 are arranged, and the two slide grooves 112 are respectively located on both sides of the placement groove 111, and the length directions of the two slide grooves 112 are arranged parallel to the length direction of the placement groove 111; two first sliding parts 211 are arranged opposite to each other, and the two first sliding parts 211 are respectively arranged in the two slide grooves 112; two second sliding parts 421 are arranged opposite to each other, and the two second sliding parts 421 are respectively arranged in the two slide grooves 112.

[0051] Specifically, one end of the base 100 is connected to the digital display module 310. When the laser scanning detection component 400 and the fixed component 200 need to be installed on the base 100, the two second sliding parts 421 on the laser scanning detection component 400 are first respectively inserted into the two slide grooves 112 on the end away from the digital display module 310, and then the laser scanning detection component 400 is pushed toward the direction of the digital display module to achieve a slidable connection between the laser scanning detection component 400 and the base 100. Then, the two first sliding parts 211 on the fixed component 200 are inserted into the two slide grooves 112 on the base 100 on the end away from the digital display module 310, and then the fixed component 200 is pushed toward the direction of the digital display module 310 to achieve a slidable connection between the fixed component 200 and the base 100.

[0052] In this embodiment, the fixed component 200 is slidably connected to the base 100 by connecting the first sliding part 211 with the slide groove 112, and the laser scanning detection component 400 is slidably connected to the base 100 by connecting the second sliding part 421 with the slide groove 112. The structure is simple and the operation is convenient.

[0053] See also Figure 4 The fixing assembly 200 further includes a fixing member 230 . The support leg is provided with a penetrating fixing hole. The fixing member 230 is arranged in the fixing hole. One end of the fixing member 230 extending into the fixing hole abuts against the base 100 .

[0054] Specifically, an internal thread is provided in the fixing hole, and an external thread is provided on the fixing piece 230. When the fixed slider 210 is moved to a suitable position, the fixing piece 230 is rotated to move the fixing piece 230 toward the fixed slider 210. One end of the fixing piece 230 extending into the fixing hole abuts against the fixed slider 210, thereby fixing the fixed slider 210 and the base 100 to prevent the fixed slider 210 from sliding during the measurement process, thereby affecting the measurement accuracy.

[0055] In this embodiment, the laser scanning detection component 400 includes: a displacement sensor 410, which is located directly above the placement groove 111, and a transmitter and a receiver are provided in the displacement sensor 410, and the projection of the light beam emission path of the transmitter on the placement groove 111 coincides with the central axis of the placement groove 111; a bracket 420, and the bottom end of the bracket 420 is provided with the second sliding part 421, and the top end of the bracket 420 is provided with an installation groove for installing the displacement sensor 410.

[0056] In the specific implementation process, the bracket 420 is moved so that the displacement sensor 410 on the bracket 420 is aligned with the starting point of the gauge section to start scanning, and then the bracket 420 is moved so that the displacement sensor 410 above the bracket 420 is moved to the end point of the gauge section to complete the scanning of the gauge section, and the distance between the sample surface and the receiver is read through the matching system, so as to infer the shrinkage of the sample after stretching and calculate the cross-sectional shrinkage rate. The shrinkage of each part can also be understood by scanning the entire sample.

[0057] See also Figure 4 The fixing assembly 200 includes: a fixed slider 210, the fixed slider 210 includes a support portion and legs respectively vertically arranged at both ends of the support portion, the support portion is penetrated by a locking hole, and the first sliding portion 211 is arranged at one end of the leg away from the support portion; a locking member 220 is arranged in the locking hole, and one end of the locking member 220 facing the first sliding portion 211 abuts against the tensile specimen.

[0058] In this embodiment, the locking hole is provided with an internal thread, and the outer surface of the locking is provided with an external thread. When the metal tensile specimen 500 needs to be tested, the metal tensile specimen 500 is placed in the placement groove 111, and then the fixed slider 210 is moved to the non-neck position of the metal tensile specimen 500. At this time, the locking member 220 on the fixed slider 210 is located above the metal tensile specimen 500, and the locking member 220 is rotated so that the end of the locking member 220 extending into the clamping space is pressed against the metal tensile specimen 500, so that the metal specimen is fixed in the clamping space.

[0059] In this embodiment, by providing a locking member 220 on the fixed slider 210 , the metal tensile specimens 500 of different lengths can be fixed by moving the position of the fixed slider 210 , thereby improving the adaptability of the tensile specimen measuring device.

[0060] In this embodiment, two fixed sliders 210 are provided, and the laser scanning detection component 400 is located between the two fixed sliders 210 .

[0061] In this embodiment, two fixed slide blocks 210 with locking members 220 are used to move left and right on the base 100 to fix the sample and ensure that the metal tensile sample 500 remains fixed during the measurement process, thereby improving the stability of the metal tensile sample 500 during the measurement process and ensuring the accuracy of the measurement.

[0062] In this embodiment, the fixed slider 210 is in a plate shape, and the thickness direction of the fixed slider 210 is arranged parallel to the length direction of the placement groove 111 .

[0063] In this embodiment, the plate-shaped fixed slider 210 can make the fixed slider 210 occupy a smaller position in the length direction of the placement groove 111, which on the one hand reduces the volume of the fixed slider 210, and on the other hand reduces the obstruction of the operator's line of sight, making operation easier.

[0064] See also Figure 3 The base 100 includes a main body 110 and a limiting portion 120, the placement groove 111 and the slide groove 112 are arranged on the main body 110, the limiting portion 120 is arranged at one end of the main body 110 close to the digital display module 310, the height of the limiting portion 120 is greater than the height of the main body 110, and the digital display module 310 is arranged on the limiting portion 120.

[0065] Specifically, the limiting portion 120 is disposed at one end of the main body 110 , and the height of the limiting portion 120 is greater than the height of the main body 110 , so that the limiting portion 120 can limit one end of the placement groove 111 and one end of the slide groove 112 .

[0066] In this embodiment, the limiting portion 120 and the main body 110 are integrally formed.

[0067] In this embodiment, the tensile specimen measuring device further includes a data processing module, and the data processing module is connected to the laser scanning detection component 400 .

[0068] Specifically, the data processing module is connected to the laser scanning detection component 400, and is used to read the distance between the surface of the metal tensile specimen 500 measured by the laser scanning detection component 400 and the receiver on the laser scanning detection component 400, so as to infer the shrinkage of the metal tensile specimen 500 after stretching, and calculate the cross-sectional shrinkage rate.

[0069] As another embodiment of the present application, a detection method is also disclosed, which is applied to the above-mentioned tensile specimen measuring device, comprising the steps of:

[0070] S100. Place the tensile specimen marked with the gauge length into the placement groove.

[0071] S200, moving the scale pointer on the length measurement component to the starting position of the gauge length segment to obtain the starting position data of the gauge length segment.

[0072] S300, moving the scale pointer on the length measurement component to the end position of the gauge length segment to obtain the end position data of the gauge length segment.

[0073] S400, obtaining the length of the gauge section according to the starting point position data and the end point position data.

[0074] S500, aligning the transmitter on the laser scanning detection component with the starting point of the gauge segment and scanning to obtain the distance from the starting point of the gauge segment to the receiver.

[0075] S600, move the laser scanning detection component along the gauge length segment until the transmitter on the laser scanning detection component is aligned with the end position of the gauge length segment, and obtain the distance from each point on the surface of the gauge length segment to the receiver.

[0076] In the specific real-time process, the stretched metal sample is placed in the placement groove 111, and the length measuring component 300 is used to detect the length of the gauge section after stretching. The length of the gauge section after stretching is subtracted from the length of the gauge section before stretching to obtain the total deformation of the gauge section. The total deformation is converted into a percentage to obtain the elongation of the metal sample.

[0077] The laser scanning detection component 400 is used to detect the distance from the surface of the metal sample to the receiver before stretching and the distance from the minimum point of the breaking gauge section to the receiver. The maximum reduction in the cross-sectional area at the necking point after the metal sample is broken is calculated based on the two distances to obtain the percentage of the original cross-sectional area, thereby obtaining the cross-sectional shrinkage rate of the metal tensile sample 500.

[0078] The detection method of this embodiment also includes using the laser scanning detection component 400 to scan the entire metal tensile specimen 500 to obtain the shrinkage conditions of various parts of the metal tensile specimen 500.

[0079] In summary, the tensile specimen measuring device of the present embodiment includes a base 100, a fixing assembly 200, a length measuring assembly 300, and a laser scanning detection assembly 400. The base 100 is provided with a placement groove 111 for placing a metal tensile specimen 500; the fixing assembly 200 is slidably arranged on the base 100, and the fixing assembly 200 is located above the placement groove 111, and is used to fix the metal tensile specimen 500; the length measuring assembly 300 is arranged on the base 100, and the length direction of the length measuring assembly 300 is consistent with the length direction of the placement groove 111. The directions are arranged parallel to each other, and are used to measure a certain length on the metal tensile specimen 500; the laser scanning detection component 400 can be slidably arranged on the base 100, and the laser emission path of the laser scanning detection component 400 is perpendicular to the length direction of the placement groove 111, and is used to detect the distance from the surface of the metal tensile specimen 500 to the laser scanning detection component 400. The utility model realizes the simultaneous measurement of the post-fracture elongation length and cross-sectional contraction of the metal tensile specimen 500 by arranging the length measurement component 300 and the laser scanning detection component 400, thereby improving the detection efficiency.

[0080] It should be noted that, in the absence of conflict, the embodiments and features in the embodiments of the present application may be combined with each other.

[0081] It should be noted that the present invention takes a tensile specimen measuring device as an example to introduce the specific structure and working principle of the present invention, but the application of this embodiment is not limited to the tensile specimen measuring device, and can also be applied to the production and use of other similar workpieces.

[0082] It should be understood that the present invention is not limited to the precise structure described above and shown in the drawings, and various modifications and changes can be made without departing from the scope thereof. The scope of the present invention is limited only by the appended claims.

[0083] The above description is only a preferred embodiment of the present invention and is not intended to limit the present invention. Any modifications, equivalent substitutions, improvements, etc. made within the spirit and principles of the present invention shall be included in the protection scope of the present invention.

Claims

1. A tensile specimen measuring device, characterized in that: include: A base, wherein the base is provided with a placement groove for placing the tensile specimen; A fixing component, slidably disposed on the base, the fixing component is located above the placement groove, and is used to fix the tensile specimen in the placement groove; A length measuring component is arranged on the base, the length direction of the length measuring component is arranged parallel to the length direction of the placement groove, and is used to measure the length of the gauge section on the tensile specimen; A laser scanning detection component can be slidably arranged on the base. The laser scanning detection component is arranged just above the placement groove and is used to detect the distance from the surface of the tensile sample to the receiver of the laser scanning detection component.

2. The tensile specimen measuring device according to claim 1, characterized in that: The length measurement assembly comprises: A caliper body is slidably connected to the digital display module, and the caliper body is arranged parallel to the placement groove; A scale pointer, one end of which is connected to the caliper body and the other end of which extends toward the placement groove; The digital display module is arranged at one end of the base. A distance measuring sensor is arranged inside the digital display module. The distance measuring sensor is used to detect the sliding distance of the caliper body.

3. The tensile specimen measuring device according to claim 2, characterized in that: The length measuring component also includes a length scale bar, which is arranged on the upper end surface of the base and is arranged parallel to the length direction of the placement groove.

4. The tensile specimen measuring device according to claim 2, characterized in that: The base also includes a slide groove, the length direction of which is parallel to the length direction of the placement groove; a first sliding part is provided on the fixing component, and a second sliding part is provided on the laser scanning detection component, and the first sliding part and the second sliding part are both provided in the slide groove.

5. The tensile specimen measuring device according to claim 4, characterized in that: The laser scanning detection component comprises: A displacement sensor is located directly above the placement groove, wherein a transmitter and the receiver are provided in the displacement sensor, and a projection of a light beam emission path of the transmitter on the placement groove coincides with a central axis of the placement groove; A bracket, wherein the bottom end of the bracket is provided with the second sliding portion, and the top end of the bracket is provided with a mounting groove for mounting the displacement sensor.

6. The tensile specimen measuring device according to claim 4, characterized in that: The fixing assembly comprises: A fixed slider, the fixed slider comprising a support portion and legs respectively arranged vertically at two ends of the support portion, the support portion is provided with a locking hole, and the first sliding portion is provided at one end of the leg away from the support portion; A locking piece is disposed in the locking hole, and one end of the locking piece facing the first sliding portion abuts against the tensile test specimen.

7. The tensile specimen measuring device according to claim 6, characterized in that: Two fixed sliders are provided, and the laser scanning detection component is located between the two fixed sliders.

8. The tensile specimen measuring device according to claim 7, characterized in that: The fixing assembly also includes a fixing piece. The support leg is provided with a penetrating fixing hole. The fixing piece is arranged in the fixing hole. One end of the fixing piece extending into the fixing hole abuts against the base.

9. The tensile specimen measuring device according to claim 4, characterized in that: The base includes a main body and a limiting part, the placement groove and the slide groove are arranged on the main body, the limiting part is arranged at one end of the main body close to the digital display module, the height of the limiting part is greater than the height of the main body, and the digital display module is arranged on the limiting part.

10. The tensile specimen measuring device according to claim 6, characterized in that: The fixed sliding block is in a plate shape, and the thickness direction of the fixed sliding block is arranged parallel to the length direction of the placement groove.

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