Young modulus measuring instrument

Abstract

The utility model provides a Young modulus measuring instrument which comprises a support, a first spiral micrometer ruler and a second spiral micrometer ruler which are perpendicular to each other are arranged on the support, the second end of the first spiral micrometer ruler is fixedly connected with the first end of the second spiral micrometer ruler, and the first spiral micrometer ruler and the second spiral micrometer ruler are both arranged in a horizontal plane. The first spiral micrometer is movably connected with a first sliding block, the first sliding block is in transmission connection with a movable shaft of the first spiral micrometer, and the first sliding block is provided with a first tension testing module and a first clamp used for fixing one end of a filament to be tested. A second clamp used for clamping the other end of the to-be-measured filament is fixed to the first end of the second spiral micrometer, and the second clamp is right opposite to the first clamp, so that the extending direction of the to-be-measured filament with the two ends fixed to the second clamp and the first clamp respectively is parallel to the horizontal plane.

Description

Technical Field

[0001] The utility model relates to the field of Young's modulus measuring tools, in particular to a Young's modulus measuring instrument. Background Art

[0002] Young's modulus is a physical quantity that describes a solid material's ability to resist deformation. It's the most common type of elastic modulus, also known as the tensile modulus. The elastic modulus can be considered a measure of how easily a material can deform elastically. A higher value indicates a greater stress required to produce a given elastic deformation, meaning the material has greater stiffness and, in turn, less elastic deformation under a given stress.

[0003] The existing measurement methods for measuring the Young's modulus of metal wires have the following defects: (1) the length of the metal wire to be measured must be about 1 meter and cannot be too short; (2) it is inconvenient to replace the metal wire fixed on the instrument; (3) the instrument for measuring the Young's modulus occupies a large area, and multiple weights of fixed mass and weighing about 1-2 kilograms are required to cooperate with the instrument for measurement, which is very physically demanding and the operation is relatively complicated and tedious.

[0004] The diameter of a conventional thin wire can be measured using a screw micrometer. However, for some fine linear materials with a diameter of about 0.01 mm, the measurement accuracy of the screw micrometer cannot meet the measurement requirements. Due to accuracy issues, measurement errors are inevitable. In addition, the length measurement and quantitative increase of the force on these fine linear materials are usually carried out separately in actual experiments and cannot be directly integrated together. Moreover, conventional Young's modulus measurements are limited to some specific metal wires, and slightly more special materials cannot be measured. For example, the Young's modulus measuring instruments currently used in university physics laboratories are almost unable to handle the measurement of the Young's modulus of a biological hair about an inch long. Utility Model Content

[0005] Based on this, it is necessary to provide a Young's modulus measuring instrument.

[0006] In order to solve the above technical problems, the utility model provides a Young's modulus measuring instrument, including a bracket, on which a first screw micrometer and a second screw micrometer perpendicular to each other are provided, the second end of the first screw micrometer is fixedly connected to the first end of the second screw micrometer, the first screw micrometer and the second screw micrometer are both arranged in a horizontal plane, the first screw micrometer is movably connected to a first slider, the first slider is transmission-connected to the moving shaft of the first screw micrometer, the first slider is provided with a first tensile testing module and a first clamp for fixing one end of the filament to be measured, the first end of the second screw micrometer is fixed with a second clamp for clamping the other end of the filament to be measured, the second clamp is opposite to the first clamp, so that the extension direction of the filament to be measured, whose two ends are respectively fixed on the second clamp and the first clamp, is parallel to the horizontal plane.

[0007] Preferably, a second slider is movably connected to the second screw micrometer, and the second slider is transmission-connected to the movable shaft of the second screw micrometer. The second slider is provided with a glass component for measuring the diameter of the filament to be measured, and a microscope is provided on the outer side of the glass component near the second glass plate, and a monochromatic light source is provided between the glass component and the microscope.

[0008] Preferably, the glass assembly includes a first glass plate and a second glass plate, the second glass plate is rotatably covered above the first glass plate, and the end portion of the second end of the second glass plate is rotatably connected to the end portion of the second end of the first glass plate, thereby forming an adjustable angle between the inner side surface of the first glass plate and the inner side surface of the second glass plate.

[0009] Preferably, a height adjustment component for controlling the height position of the first end of the first glass plate is provided at the first end of the first glass plate, and the second end of the first glass plate is connected to the second slider via a connecting member.

[0010] Preferably, the height adjustment assembly includes a support member and an adjusting bolt, the support member is fixedly connected to the first end of the first glass plate, a screw hole matching the adjusting bolt is provided on the support member, a vertical rod is movably provided on the bracket, a fixing block is provided on the vertical rod, a through hole is provided on the fixing block, the upper end of the adjusting bolt is inserted into the through hole, the lower end of the adjusting bolt passes through the through hole and is inserted into the screw hole, and the adjusting bolt is vertically arranged.

[0011] Preferably, the second end of the first glass plate and the second end of the second glass plate are hinged via a hinge, the connecting member is a magnet, and the corresponding second slider is provided with magnetic metal, and the magnet is adsorbed on the magnetic metal.

[0012] Preferably, a tension balancing assembly is provided on the bracket, and the tension balancing assembly includes an L-shaped bracket, a first tension rope, a second tension rope, a second tension test module, a third tension test module, a movable block, a steering shaft, a rotating assembly and a laser emitter. The second tension test module is fixed on the first slider, the steering shaft and the laser emitter are both fixedly provided on the L-shaped bracket, the movable block is slidingly connected to the L-shaped bracket, one end of the first tension rope is connected to the L-shaped bracket, and the other end is connected to the movable block, the third tension test module is fixed on the movable block, one end of the second tension rope is connected to the second tension test module, and the other end is connected to the third tension test module, the middle end of the second tension rope is wound around the steering shaft, the length of the first tension rope is adjusted by the rotating assembly, and the emission port of the laser emitter is directly opposite to the second tension test module.

[0013] Preferably, the rotating assembly includes a rotating shaft and a rotating device, the rotating device is arranged on the L-shaped bracket, the rotating shaft is rotatably connected to the L-shaped bracket, the rotating device is transmission-connected to the rotating shaft, and the rotating device drives the rotating shaft to rotate, so that the first tension rope is wound and stretched, thereby pulling the movable block to move.

[0014] Preferably, the rotating assembly includes an adjusting knob and a threaded hole, the threaded hole is located on the L-shaped bracket, the outer surface of the bottom end of the adjusting knob is provided with an external thread matching the threaded hole, and the bottom end of the adjusting knob is inserted into the threaded hole.

[0015] Preferably, the tension testing module includes a tension sensor and a tension display module, and the tension display module includes a switch, a battery compartment and a display.

[0016] The beneficial effects of this utility model include: the reading of the first micrometer screw not only directly reflects the size of the fine wire to be measured on the fixture, but also provides tension for the fine wire through the rotating drum. The second micrometer screw can directly measure the width of the interference fringes under a microscope, thereby obtaining the diameter of the tiny fine wire. This measuring device can conveniently measure the Young's modulus of thin and short linear materials. BRIEF DESCRIPTION OF THE DRAWINGS

[0017] The above and other purposes, features and advantages of the present invention will become more apparent through a more detailed description of the preferred embodiments of the present invention shown in the accompanying drawings. The same reference numerals indicate the same parts throughout the drawings, and the drawings are not intentionally scaled to actual size. The emphasis is on illustrating the subject matter of the present invention.

[0018] Figure 1 This is a schematic top view of the overall structure of a preferred embodiment of the present utility model;

[0019] Figure 2 This is a top view of the instrument of the preferred embodiment of the utility model with the glass component removed;

[0020] Figure 3 This is a schematic diagram of the state of the instrument of the preferred embodiment of the present utility model when using a glass component to measure the diameter of a filament to be measured;

[0021] Figure 4 for Figure 3 Schematic diagram of the cross section at AA`;

[0022] Figure 5 It is a schematic diagram of the connection structure between the height adjustment component and the glass component;

[0023] In the figure: a first micrometer screw 2; a first straight ruler 201; a first screw shaft 202; a first screw drum 203; a first slider 4; a first fixture 6; a first tension test module 701; a second micrometer screw 3; a second straight ruler 301; a second screw shaft 302; a second screw drum 303; a second fixture 8; a second slider 9; a glass assembly 10; a first glass plate 101; a second glass plate 102; a microscope 11; a light source 12; a connector 13; a filament to be tested 14; a support 103; an adjusting bolt 104; a vertical rod 106; a fixing block 107; a second tension test module 702 and a third tension test module 703; a rotating assembly 15; a first tension rope 161; a second tension rope 162; a laser emitter 18; a steering shaft 19; an L-shaped bracket 20; and a movable block 21. DETAILED DESCRIPTION

[0024] In order to facilitate understanding of the present invention, the present invention will be described more comprehensively below with reference to the relevant drawings.

[0025] It should be noted that when an element is considered to be "connected" to another element, it may be directly connected to the other element and integrated therewith, or there may be an intermediate element. The terms "mounted", "one end", "the other end" and similar expressions used herein are for illustrative purposes only.

[0026] Unless otherwise defined, all technical and scientific terms used herein have the same meanings as those commonly understood by those skilled in the art. The terms used in this specification are for the purpose of describing specific embodiments only and are not intended to limit the present invention. The term "and / or" as used herein includes any and all combinations of one or more of the relevant listed items.

[0027] refer to Figure 1-5The utility model provides a Young's modulus measuring instrument, including a bracket, on which a first screw micrometer 2 and a second screw micrometer 3 are perpendicular to each other, the second end of the first screw micrometer 2 is fixedly connected to the first end of the second screw micrometer 3, the first screw micrometer and the second screw micrometer are both arranged in the same horizontal plane, a first slider 4 is movably connected to the first screw micrometer, the first slider 4 is transmission-connected to the moving shaft of the first screw micrometer 2, a first tensile testing module 7 and a first clamp 6 for fixing the lower end of the filament to be measured 14 are provided on the first slider 4, a second clamp 8 for clamping the upper end of the filament to be measured 14 is fixed to the first end of the second screw micrometer 3, the second clamp is opposite to the first clamp, so that the extension direction of the filament to be measured, whose two ends are respectively fixed on the second clamp and the first clamp, is parallel to the horizontal plane. The support is a tripod, comprising a support plate and three legs, each located at the bottom of the support plate. Each leg is equipped with a screw for adjusting the leg height. A level is mounted on the support plate, and a first micrometer screw 2 and a second micrometer screw 3 are secured to the support plate. The level is a bubble level. By adjusting the screws to center the bubble in the level, the instrument mounted on the support is kept level.

[0028] In a preferred embodiment, a second slider 9 is movably connected to the second micrometer screw 3. The second slider 9 is in driving connection with the movable shaft of the second micrometer screw 3. The second slider 9 is connected to a glass assembly 10 for measuring the diameter of the filament to be measured. In a preferred embodiment, a microscope 11 is positioned near the outer side of the second glass plate on the glass assembly, and a monochromatic light source 12 is positioned between the glass assembly 10 and the microscope 11.

[0029] In a preferred embodiment, the glass assembly 10 includes a first glass plate 101 and a second glass plate 102. The second glass plate 102 is pivotally positioned over the first glass plate 101. The second end of the second glass plate 102 is pivotally connected to the second end of the first glass plate 101, thereby forming an adjustable angle between the inner side surfaces of the first glass plate 101 and the second glass plate 102. Both the first and second glass plates 101, 102 are flat glass. The first and second glass plates 101, 102 are stacked to form a non-parallel double-layer flat glass assembly. The first end of the first glass plate 101 and the first end of the second glass plate 102 can be freely adjusted according to the dimensions of the object being measured. The second end of the first glass plate 101 and the second end of the second glass plate 102 are connected by a magnet. When a thin wire is present, the inner side surfaces of the first glass plate 101 and the second glass plate 102 form a slight angle. The angle is located where the second ends of the first and second glass plates 101, 102 contact each other. In a preferred embodiment, the position and angle of the first glass plate 101 on the second slider 9 are fixed, and the second end of the second glass plate 102 is always connected to the second end of the first glass plate 101 .

[0030] In a preferred embodiment, a height adjustment component for controlling the height position of the first end of the first glass plate 101 is provided at the first end of the first glass plate 101 , and the second end of the first glass plate 101 is connected to the second slider 9 via a connector 13 .

[0031] like Figure 5 As shown, in a preferred embodiment, the height adjustment assembly includes a support member 103 and an adjusting bolt 104, the support member 103 is fixedly connected to the first end of the first glass plate 101, and a screw hole matching the adjusting bolt 104 is provided on the support member 103, and a vertical rod 106 is movably provided on the bracket, that is, the vertical rod 106 can move parallel to the bracket, so that when the second slider 9 is moved, the vertical rod 106 can move to the corresponding position accordingly, and a fixing block 107 is provided on the vertical rod 106, and a through hole is provided on the fixing block 107, and the upper end of the adjusting bolt 104 is inserted into the through hole, and the lower end of the adjusting bolt 104 passes through the through hole and is inserted into the screw hole, and the adjusting bolt 104 is vertically arranged. When the diameter of the filament 14 to be measured is to be measured, the adjusting bolt 104 is rotated to change the position of the lower end of the adjusting bolt 104 in the screw hole, thereby adjusting the height of the first end of the first glass plate 101 fixedly connected to the support member 103 so that the filament 14 to be measured can be exactly located between the first glass plate 101 and the second glass plate 102, and can contact the first glass plate 101 and the second glass plate 102 at the same time.

[0032] In a preferred embodiment, the second end of the first glass plate 101 and the second end of the second glass plate 102 are hingedly connected. The connecting member 13 is a magnet. The corresponding second slider 9 is provided with a magnetic metal to which the magnet is attracted. A magnet 13 is provided on each of the second ends of the first glass plate 101 and the second end of the second glass plate 102. The second end of the glass assembly 10 is attracted to the second slider 9 through the magnetic force of the magnet. A height adjustment assembly is provided on the first end of the first glass plate 101. The height adjustment assembly includes a support member 103 and an adjustment bolt 104. These support members 103 and adjustment bolt 104 cooperate to adjust the height of the first end of the first glass plate 101. Since the second glass plate 102 is positioned over the first glass plate 101, adjusting the height of the first glass plate 101 correspondingly adjusts the overall height of the glass assembly 10, ensuring that the filament 14 to be tested is positioned between the first and second glass plates 101, 102, and in contact with both.

[0033] After the glass assembly 10 is adsorbed on the second slider 9, the filament to be tested 14 clamped between the first clamp and the second clamp is placed between the first glass plate 101 and the second glass plate 102. Using monochromatic light, interference fringes can be seen under a microscope.

[0034] In a preferred embodiment, the second clamp 8 is directly opposite to the first clamp 6 , so that the extension direction of the filament to be measured 14 , whose two ends are respectively fixed between the second clamp 8 and the first clamp 6 , is parallel to the horizontal direction.

[0035] In a preferred embodiment, the second clamp 8 and the first clamp 6 are both provided with anti-skid patterns on the clamping surfaces of the second clamp 8 and the first clamp 6. The anti-skid patterns extend in the same direction as the horizontal direction. The anti-skid patterns increase the friction coefficient of the clamping position on the second clamp 8 and the first clamp 6, which can well clamp the thin wire to be measured and prevent sliding from affecting the measurement data. The upper end of the thin wire to be measured is fixed by the second clamp 8 and the lower end is fixed by the first clamp 6. The first clamp 6 is fixed to the first slide 4 and the thin wire is clamped by adjusting the tightening knob. After fixing one end of the thin wire to the first clamp 6 by the tightening knob of the first clamp 6, the first spiral drum 203 is rotated to lower the first clamp 6 downward under the transmission of the first spiral shaft 202, thereby moving away from the second clamp on the second ruler, and the thin wire can be straightened. Continuing to rotate the first spiral drum 203 can provide tension to the thin wire, and the magnitude of the tension is known through the tension test module.

[0036] In order to balance the error caused by tension, a tension balancing assembly is set on the bracket, and the tension balancing assembly includes an L-shaped bracket 20, a first tension rope 161, a second tension rope 162, a second tension test module 702, a third tension test module 703, a movable block 21, a steering shaft 19, a rotating assembly 15 and a laser emitter 18. The second tension test module 702 is fixed on the first slider 4, the steering shaft 19 and the laser emitter 18 are both fixedly set on the L-shaped bracket 20, and the movable block 21 is slidably connected to the L-shaped bracket 20. One end of the first tension rope 161 is connected to the L-shaped bracket 20, and the other end is connected to the movable block 21. The third tension test module 703 is fixed to the movable block 21. One end of the second tension rope 162 is connected to the second tension test module 702, and the other end is connected to the third tension test module 703. The middle end of the second tension rope 162 is wrapped around the steering shaft 19. The length of the first tension rope 161 is adjusted by the rotating assembly 15. The emission port of the laser emitter 18 is directly opposite the second tension test module 702. Optionally, the movable block 21 may not be provided, and the two ends of the third tension test module 703 are respectively connected to one end of the first tension rope 161 and one end of the second tension rope 162.

[0037] The L-shaped bracket 20 can adjust the length of the first tension rope 161 via the rotating assembly 15, thereby providing tension to the slider 4. The tension display module on the L-shaped bracket 20 provides data on the tension magnitude. That is, the tension magnitude can be controlled by the rotating assembly 15, and the specific value of the tension is displayed on the tension display module. The steering shaft 19 can be moved horizontally left and right to fine-tune the steering position, thereby changing the tension position of the second tension rope 162 wrapped around the steering shaft 19, thereby changing the specific angle of the second tension rope 162's extension in the horizontal plane, so that the measured filament 14 is aligned with the second tension rope 162 and the calibration laser emitted by the laser emitter 18. The emitted calibration laser is used to calibrate whether the tension provided by the tension rope is aligned with the tension of the measured filament 14. The position of the steering shaft 19 can be fine-tuned by translation within the horizontal plane, and the calibration laser is used to calibrate whether it is aligned with the measured filament. Optionally, the rotating assembly 15 includes a rotating shaft and a rotating device, the rotating device is arranged on the L-shaped bracket 20, the rotating shaft is rotatably connected to the L-shaped bracket 20, the rotating device is transmission-connected to the rotating shaft, and the rotating device drives the rotating shaft to rotate, so that the length of the first tension rope 161 is extended and retracted by winding, thereby pulling the movable block 21 to move. When the first tension rope 161 is wound to shorten its length, the movable block will be pulled away from the second tension rope 162, so that the second tension rope 162 is straightened. When the wound part of the first tension rope 161 is released, the overall length of the first tension rope 161 becomes longer.

[0038] Optionally, the rotating assembly includes an adjusting knob and a threaded hole, the threaded hole is located on the L-shaped bracket, the outer surface of the bottom end of the knob is provided with an external thread matching the threaded hole, and the bottom end of the knob is inserted into the threaded hole.

[0039] Specific operation: Adjust the rotating assembly 15 so that the first tension rope 161 and the second tension rope 162 are straightened. Continue to adjust the rotating assembly 15. At this time, the magnitude of the tension will be displayed on the third tension test module 703, and the magnitude of the tension will also be displayed on the second tension test module 702. Adjust the first spiral drum 203 so that the first slider 4 moves horizontally. At this time, as the first slider 4 moves, the filament to be tested 14 is gradually straightened and the load is subjected to a certain tensile load. Continue to adjust the first spiral drum 203 until the three display screens of the tension test modules 701, 702, and 703 have the same reading, that is, the tension test modules 701, 702, and 703 are all subjected to the same tension in the extension direction of the filament to be tested 14. At this time, the force on the first slider 4 reaches equilibrium, and the resultant force on the first clamp 6 in the extension direction of the filament to be tested 14 is 0. The value displayed by the first tension test module 701 can directly read the tension exerted on the filament 14 to be tested. Correspondingly, the length of the filament 14 to be tested after being stretched can be read out through the first spiral micrometer 2, so that the specific measurement value can be obtained intuitively and conveniently.

[0040] In a preferred embodiment, the first spiral micrometer 2 includes a first ruler 201, a first spiral shaft 202 and a first spiral drum 203, the first spiral shaft 202 rotates in the first ruler 201, the first spiral drum 203 is connected to the first end of the first spiral shaft 202, the first slider 4 is movably connected to the first ruler 201, and the first slider 4 is transmission-connected to the first spiral shaft 202, the second spiral micrometer 3 includes a second ruler 301, a second spiral shaft 302 is provided in the second ruler 301, the second spiral shaft 302 is connected to the second spiral drum 303, the second slider 9 is movably connected to the second ruler 301, the second slider 9 is transmission-connected to the second spiral shaft 302, and the second clamp 8 is fixedly connected to the second ruler 301. The extension direction of the first ruler 201 is completely perpendicular to the extension direction of the second ruler 301. Both the first ruler 201 and the second ruler 301 are provided with distance scales, with the smallest scale being in millimeters. The spiral drum is marked with one hundred scale marks per rotation. Rotating the corresponding spiral drum rotates the first spiral shaft 202 or the second spiral shaft 302 accordingly. Rotating the first spiral shaft or the second spiral shaft slightly moves along the first or second ruler, driving the first slider to slide along the perpendicular ruler. Optionally, one rotation of the first spiral drum causes the first slider to move exactly one millimeter horizontally. The first ruler 201 and the second ruler 301 are arranged perpendicular to each other, and the second slider is made of metallic iron.

[0041] The spiral drum on the first ruler 201 can rotate forward or backward, and pushes the first slider to move up and down in the horizontal direction along the first ruler through the spiral shaft connected to it. The readings on the first ruler 201 and the first spiral drum 203 can determine the length of the thin wire and the length of the thin wire 14 to be measured. There is a second spiral shaft 302 in the second ruler 301, and one end of the second spiral shaft 302 is the second spiral drum 303. When the second spiral drum 303 rotates, the second spiral shaft 302 pushes the second slider 9 to move. There are scales on the second spiral drum 302, and one circle is one hundred scales. When the second spiral drum 303 rotates one circle, the second slider 9 moves just 1 mm in the horizontal plane. The second slider 12 is an iron device, and the second slider 12 is completely perpendicular to the second ruler 301. The second slider 9 is mainly used for the connection and position measurement of the glass component 10.

[0042] In a preferred embodiment, the first ruler 201 and the second ruler 301 are arranged perpendicular to each other, the first end of the second ruler 301 is fixedly connected to the second end of the first ruler 201, and the connection between the first ruler 201 and the second ruler 301 is fixedly connected to the bracket.

[0043] In a preferred embodiment, the first tension test module 701, the second tension test module 702, and the third tension test module 703 are three independent tension test modules. All three tension test modules include a switch, a battery compartment, and a display, which can be used to detect whether the force is balanced. The tension test modules 701, 702, and 703 each include a tension sensor and a tension display module. The tension display module includes a switch, a battery compartment, and a display for displaying the measured tension reading. In order to adsorb the glass assembly 10, the second slider 9 is made of metal iron. Optionally, a metal sheet can be set at the position of the second slider 9 for fixing the glass assembly 10. The tension sensor only tests the force when the first clamp 6 is pulled, and displays the specific reading through the tension display module connected thereto, i.e., the display screen. The display data of the tension display module is 0 when the thin wire is not straightened. The first tension test module 701 will display a non-zero tension value only when the thin wire 14 to be tested is straightened.

[0044] Experimental Procedure: Place the measuring instrument horizontally, ensuring that both the first micrometer screw 2 and the first micrometer screw 3 are horizontally extended. During measurement, use the second clamp 8 and the first clamp 6 to clamp the ends of the thin wire 14, respectively. Rotate the first spiral drum 203 to move the first clamp 6 downward along with the first slider 4, thereby straightening the thin wire. Adjust the steering axis by translation, and use the vertical detection laser 18 to ensure that the tension rope 16 and the thin wire are aligned. The tension rope 16 includes the first tension rope 161 and the second tension rope 162.

[0045] Continue rotating first spiral drum 203 in the same direction, stretching the filament. Tension sensor 7 now measures the tension and displays it on a connected display. Simultaneously, adjust tension adjustment knob 15 to straighten tension cord 16, causing tension test modules 702 and 703 to display tension values ​​similar to those on tension display module 701. Fine-tune rotation of first spiral drum 203 ensures that tensions on tension test modules 701, 702, and 703 are the same. At this point, record the base tension data F1 and the length L1 of filament 14 to be measured, as displayed on first micrometer screw 2.

[0046] The first vertical spiral drum 203 continues to rotate, further stretching the filament. At the same time, the tension adjustment knob 15 is adjusted again so that the tension test modules 702 and 703 display tension values ​​similar to those of the tension display module 701. By fine-tuning the rotation of the first spiral drum 203, the tension test modules 701, 702, and 703 display the same tension. The second tension data F2 measured by the tension sensor is recorded, along with the length L2 of the filament 14 to be measured displayed on the first micrometer screw 2.

[0047] The difference in the pulling force on the filament 14 to be measured is obtained by F2-F1. The difference in the length of the filament 14 to be measured is obtained by ΔL=L2-L1.

[0048] A thin wire is clamped by the first end of the glass assembly 10, and the distance D from the contact position of the double-layer glass to the thin wire can be directly read using the second ruler. Under monochromatic light, interference fringes appearing on the double-layer flat glass of the glass assembly 10 can be observed through the microscope 11. By rotating the second spiral drum 303, the second slider moves along the extension direction of the second ruler, thereby driving the flat glass to move slightly, and the interference fringes can be counted. The spacing a of the interference fringes can be quickly obtained, and the fringe spacing a can be calculated using the reading on the second spiral drum 303.

[0049] The diameter of the thin wire d can be calculated by the following formula:

[0050]

[0051] Where λ is the wavelength of monochromatic light, α is the fringe spacing, and D is the distance from the second end of the double-layer glass to the thin line.

[0052] The calculation formula of Young's elastic modulus of thin wire is:

[0053]

[0054] L is the distance between the two clamps when the thin wire is straightened, ΔL is the small distance increased by continuing to rotate the first spiral drum 203 after the thin wire is straightened, and ΔF is the tension difference from straightening the thin wire to finally stopping the rotation of the first spiral drum 203.

[0055] In this application, unless otherwise expressly specified or limited, when a first feature is "above" or "below" a second feature, it may mean that the first and second features are in direct contact, or the first and second features are in indirect contact through an intermediate medium. Furthermore, when a first feature is "above," "above," or "above" a second feature, it may mean that the first feature is directly above or diagonally above the second feature, or simply means that the first feature is at a higher level than the second feature. When a first feature is "below," "below," or "below" a second feature, it may mean that the first feature is directly below or diagonally below the second feature, or simply means that the first feature is at a lower level than the second feature.

[0056] In the description of this specification, the description with reference to the terms "preferred embodiment", "further embodiment", "other embodiments" or "specific example" means that the specific features, structures, materials or characteristics described in conjunction with the embodiment or example are included in at least one embodiment or example of the present application. In this specification, the schematic expressions of the above terms do not necessarily refer to the same embodiment or example. Moreover, the specific features, structures, materials or characteristics described can be combined in any one or more embodiments or examples in a suitable manner. In addition, those skilled in the art can combine and combine different embodiments or examples described in this specification and the features of different embodiments or examples, unless they are contradictory.

[0057] Although the embodiments of the present application have been shown and described above, it can be understood that the above embodiments are exemplary and cannot be understood as limitations on the present application. Ordinary technicians in this field can change, modify, replace and modify the above embodiments within the scope of the present application.

Claims

1. A Young's modulus measuring instrument, characterized in that: The invention comprises a bracket, which is a tripod bracket, on which a spirit level is provided, and on which legs of the bracket are provided leg screws for adjusting the height, and on which a first screw micrometer is provided, and on which a first slider is movably connected, and which is transmission-connected to a movable shaft of the first screw micrometer, and on which a first tensile test module and a first clamp for fixing one end of a filament to be tested are provided, and on which a second clamp for clamping the other end of the filament to be tested is fixed, and which is directly opposite to the first clamp, so that the extension direction of the filament to be tested, whose two ends are respectively fixed on the second clamp and the first clamp, is parallel to the horizontal plane.

2. The measuring instrument according to claim 1, wherein A tension balancing assembly is provided on the bracket, and the tension balancing assembly includes an L-shaped bracket, a first tension rope, a second tension rope, a second tension test module, a third tension test module, a movable block, a steering shaft, a rotating assembly and a laser emitter. The second tension test module is fixed on the first slider, the steering shaft and the laser emitter are both fixedly provided on the L-shaped bracket, the movable block is slidingly connected to the L-shaped bracket, one end of the first tension rope is connected to the L-shaped bracket, and the other end is connected to the movable block, the third tension test module is fixed on the movable block, one end of the second tension rope is connected to the second tension test module, and the other end is connected to the third tension test module, the middle end of the second tension rope is wound around the steering shaft, the length of the first tension rope is adjusted by the rotating assembly, and the emission port of the laser emitter is directly opposite to the second tension test module.

3. The measuring instrument according to claim 2, wherein: The rotating assembly includes a rotating shaft and a rotating device. The rotating device is arranged on the L-shaped bracket. The rotating shaft is rotatably connected to the L-shaped bracket. The rotating device is transmission-connected to the rotating shaft. The rotating device drives the rotating shaft to rotate, so that the first tension rope is wound and stretched, thereby pulling the movable block to move.

4. The measuring instrument according to claim 3, wherein The rotating assembly includes an adjusting knob and a threaded hole. The threaded hole is located on the L-shaped bracket. The outer surface of the bottom end of the knob is provided with an external thread matching the threaded hole. The bottom end of the knob is inserted into the threaded hole.

5. The measuring instrument according to claim 1 or 2, characterized in that The first micrometer screw is vertically connected to the second micrometer screw, and the first micrometer screw and the second micrometer screw are both arranged in the same horizontal plane. The second clamp is fixed to the first end of the second micrometer screw close to the first micrometer screw. The second micrometer screw is movably connected to the second slider, and the second slider is transmission-connected to the movable shaft on the second micrometer screw. The second slider is provided with a glass component for measuring the diameter of the filament to be measured. The glass component includes a first glass plate and a second glass plate. A microscope is provided on the outer side of the glass component close to the second glass plate, and a monochromatic light source is provided between the glass component and the microscope.

6. The measuring instrument according to claim 5, wherein The second glass plate rotating cover is arranged above the first glass plate, and the end of the second end of the second glass plate is rotatably connected to the end of the second end of the first glass plate, thereby forming an angle between the inner side surface of the first glass plate and the inner side surface of the second glass plate.

7. The measuring instrument according to claim 6, wherein The first end of the first glass plate is provided with a height adjustment component for controlling the height position of the first end of the first glass plate, and the second end of the first glass plate is connected to the second slider through a connecting member.

8. The measuring instrument according to claim 7, wherein The height adjustment assembly includes a support member and an adjusting bolt, the support member is fixedly connected to the first end of the first glass plate, a screw hole matching the adjusting bolt is provided on the support member, a vertical rod is movably provided on the bracket, a fixing block is provided on the vertical rod, a through hole is provided on the fixing block, the upper end of the adjusting bolt is inserted into the through hole, the lower end of the adjusting bolt passes through the through hole and is inserted into the screw hole, and the adjusting bolt is vertically arranged.

9. The measuring instrument according to claim 7, wherein: The second end of the first glass plate and the second end of the second glass plate are hinged via a hinge. The connecting member is a magnet. The corresponding second sliding block is provided with a magnetic metal, and the magnet is adsorbed on the magnetic metal.

10. The measuring instrument according to claim 2, wherein The first tension testing module, the second tension testing module and the third tension testing module each include a tension sensor and a tension display module, and the tension display module includes a switch, a battery compartment and a display.

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