Solid material measuring device and method based on Young modulus

Abstract

The invention relates to a solid material measuring device and method based on Young modulus, the solid material measuring device comprises a workbench and a working cover fixedly mounted at the top of the workbench, a dry plate frame is arranged in the working cover, and a Lloyd mirror is fixedly mounted on one side of the top of the dry plate frame; a metal wire chuck and a tension sensor are fixedly arranged on the workbench on the two sides of the dry plate frame respectively, and an air inlet mechanism used for ventilating the working cover is arranged behind the metal wire chuck; tension is applied to one end of the to-be-measured metal wire through the tension sensor, and as the to-be-measured metal wire is stretched, the Lloyd mirror moves along with the tension sensor, so that the distance from a light source of the laser to the Lloyd mirror is changed, the distance from the light source of the laser to the Lloyd mirror is increased, and interference fringes become narrower from wide; the infinitesimal displacement is directly measured through the interference of the two beams of coherent light, and the method not only improves the measurement sensitivity, but also has low dependence on environmental conditions.

Description

Technical Field

[0001] The invention relates to the technical field of solid material measurement, and in particular to a solid material measurement device and method based on Young's modulus. Background Art

[0002] In recent years, laser interferometry technology, which combines the advantages of large measurement range, high resolution and high measurement accuracy, has been widely used, especially in micro-size measurement. Young's modulus is a very important parameter in engineering mechanics. The determination of this parameter is of great significance to the study of the mechanical properties of metal materials, optical fiber materials, nanomaterials, semiconductors, polymers, rubber, ceramics and other materials. To detect this parameter, it is necessary to solve the micro-scale measurement. With the help of high-precision laser interferometry detection technology, a more accurate Young's modulus can be obtained, laying the foundation for the analysis of the mechanical properties of materials.

[0003] Existing optical lever technology mainly relies on the reflection and refraction of light on the lever arm to amplify tiny displacements. This method has high requirements on the stability of the light path and is easily affected by factors such as environmental vibration and temperature changes. At the same time, during the test process, external air flow can easily affect the accuracy of Young's modulus measurement. Summary of the invention

[0004] The technical problems solved by this solution are:

[0005] (1) How to solve the problem that the existing optical lever technology has high requirements for the stability of the light path and is easily affected by environmental vibration and temperature changes;

[0006] (2) How to solve the problem that the external air flow during the test process can easily affect the accuracy of the Young's modulus measurement.

[0007] The objective of the present invention can be achieved through the following technical scheme: a solid material measuring device based on Young's modulus, comprising a workbench and a work cover fixedly installed on the top thereof, a dry plate rack is arranged inside the work cover, a Lloyd's mirror is fixedly installed on one side of the top of the dry plate rack, a metal wire clamp and a tension sensor are fixedly arranged on the workbench on both sides of the dry plate rack, the dry plate rack is fixedly connected to the end of the tension sensor, and an air intake mechanism for ventilating the work cover is arranged behind the metal wire clamp.

[0008] The further technical improvement of the present invention is that: a digital microscope is arranged on the front of the Lloyd's mirror, and a laser is arranged on the back of the Lloyd's mirror, and the position of the output end of the laser corresponds to the position of the input end of the digital microscope; a tension sensor is used to apply tension to one end of the metal wire to be measured, and as the metal wire to be measured is stretched, the Lloyd's mirror moves together with the tension sensor, causing the distance from the light source of the laser to the Lloyd's mirror to change, so that the distance from the light source of the laser to the Lloyd's mirror becomes larger, and the interference fringes become narrower from wide, and the tiny displacement is directly measured by the interference of two coherent light beams. This method not only improves the sensitivity of the measurement, but also has a low dependence on environmental conditions.

[0009] A further technical improvement of the present invention is that the air intake mechanism includes an electric push rod fixedly connected to the workbench, the extended end of the electric push rod is rotatably provided with a roller, the top of the working cover is hinged with a first sealing door, and the bottom of the first sealing door is rollingly connected to the roller.

[0010] A further technical improvement of the present invention is that a positioning frame is fixedly installed on the working cover on one side of the electric push rod, one end of the positioning frame is rotatably connected to an L-shaped plate, and the extended end of the electric push rod is movably connected to the bottom of the L-shaped plate through a first lever.

[0011] A further technical improvement of the present invention is that a computer is fixedly installed on the top of the working cover, the input end of the computer is electrically connected to the output end of the digital microscope, a cooling fan is fixedly installed on the side of the first sealing door away from the computer, and the output end of the cooling fan is arranged toward the computer.

[0012] A further technical improvement of the present invention is that: an air vent is provided on the outer wall of the working cover away from the electric push rod, two guide frames are fixedly installed on the top of the inner wall of the working cover, a transmission rod is movably inserted between the two guide frames, the transmission rod is arranged horizontally, and one end of the transmission rod is slidably connected with the top of the L-shaped plate through the second lever; when the extended end of the electric push rod is at the shortest, the first sealing door and the second sealing door are in a closed state, preventing external airflow from entering the working cover, ensuring that the airflow in the working cover will not affect the accuracy of the Young's modulus measurement, turning on the cooling fan so that the blown airflow blows and dissipates heat for the computer, and after the measurement is completed, the extended end of the electric push rod is controlled to extend so that the roller pushes open the first sealing door, so that the airflow blown out by the cooling fan enters the working cover. At the same time, the first lever drives the L-shaped plate to rotate, so that the second lever and the transmission rod move horizontally, and the second sealing door is pushed to open by the transmission rod, so that ventilation is allowed in the working cover, which can not only quickly cool down, but also avoid the accumulation of toxic gases in the working cover.

[0013] A further technical improvement of the present invention is that a connecting frame is fixedly installed on the inner wall of the working cover, a second sealing door for blocking the air vent is hinged on the outer wall of the working cover, and a tension spring is fixedly connected between the second sealing door and the connecting frame.

[0014] A working method of a solid material measuring device based on Young's modulus, the working method specifically comprising the following steps:

[0015] Step 1: Fix one end of the metal wire to be tested on the tension sensor, aim the laser at the Lloyd's mirror, make the two form a certain small angle with each other, ensure the grazing incidence condition of the Lloyd's mirror, then fix the other end of the metal wire to be tested on the wire clamp, and point the lens of the digital microscope directly to the light source of the laser. The light source emits a beam-expanding laser. One beam of light is reflected by the Lloyd's mirror to the lens of the digital microscope, and the other beam of light is directly emitted to the lens of the digital microscope. The two beams overlap at the lens of the digital microscope, and there is a certain optical path difference, which meets the coherence condition;

[0016] Step 2: Apply tension to one end of the metal wire to be measured through the tension sensor. As the metal wire to be measured is stretched, the Lloyd's mirror moves with the tension sensor, causing the distance from the laser light source to the Lloyd's mirror to change, making the distance from the laser light source to the Lloyd's mirror larger, and the interference fringes narrower. The tiny displacement is directly measured through the interference of two coherent light beams. This method not only improves the sensitivity of the measurement, but also has low dependence on environmental conditions.

[0017] Step 3: When the extended end of the electric push rod is at its shortest, the first sealing door and the second sealing door are in a closed state to prevent external airflow from entering the working cover, ensuring that the airflow in the working cover will not affect the accuracy of the Young's modulus measurement. Turn on the cooling fan so that the blown airflow can dissipate heat for the computer. After the measurement is completed, control the extended end of the electric push rod to extend so that the roller pushes open the first sealing door to facilitate the airflow blown out by the cooling fan to enter the working cover. At the same time, the first lever drives the L-shaped plate to rotate, so that the second lever and the transmission rod move horizontally, and the second sealing door is pushed open by the transmission rod to ventilate the working cover, which can not only quickly cool down, but also avoid the accumulation of toxic gases in the working cover.

[0018] Compared with the prior art, the present invention has the following beneficial effects:

[0019] When the present invention is used, one end of the metal wire to be measured is fixed on the tension sensor, and the laser is aimed at the Lloyd's mirror so that the two are at a certain slight angle to each other, ensuring the grazing incidence condition of the Lloyd's mirror. Then, the other end of the metal wire to be measured is fixed on the metal wire clamp, and the lens of the digital microscope is directly facing the light source of the laser. The light source emits a beam expansion laser, and one beam of light is reflected by the Lloyd's mirror to the lens of the digital microscope, and the other beam of light is directly emitted to the lens of the digital microscope. The two beams of light overlap at the lens of the digital microscope, and there is a certain optical path difference, which meets the coherence condition. Tension is applied to one end of the metal wire to be measured by the tension sensor. As the metal wire to be measured is stretched, the Lloyd's mirror moves together with the tension sensor, resulting in a change in the distance from the laser light source to the Lloyd's mirror, so that the distance from the laser light source to the Lloyd's mirror becomes larger, and the interference fringes become narrower. The small displacement is directly measured by the interference of two coherent light beams. This method not only improves the measurement sensitivity, but also has low dependence on environmental conditions.

[0020] When the present invention is in use, when the extended end of the electric push rod is at the shortest, the first sealing door and the second sealing door are in a closed state, so as to prevent external airflow from entering the working cover, ensure that the airflow in the working cover will not affect the accuracy of the Young's modulus measurement, turn on the cooling fan, so that the blown airflow blows the computer to dissipate heat, and when the measurement is completed, the extended end of the electric push rod is controlled to extend, so that the roller pushes open the first sealing door, so that the airflow blown by the cooling fan can enter the working cover. At the same time, the first lever drives the L-shaped plate to rotate, so that the second lever and the transmission rod move horizontally, and the second sealing door is pushed to open by the transmission rod, so that the working cover is ventilated, which can not only quickly cool down, but also avoid the accumulation of toxic gases in the working cover. BRIEF DESCRIPTION OF THE DRAWINGS

[0021] In order to facilitate understanding by those skilled in the art, the present invention is further described below with reference to the accompanying drawings.

[0022] Figure 1 It is a three-dimensional schematic diagram of the overall structure of the present invention;

[0023] Figure 2 It is a schematic cross-sectional view of the overall structure of the present invention;

[0024] Figure 3 It is a schematic diagram of the cross-sectional structure of the middle part of the working cover of the present invention;

[0025] Figure 4 It is a schematic diagram of the structure of the air intake mechanism of the present invention;

[0026] Figure 5 It is a three-dimensional schematic diagram of the local structure of the air intake mechanism of the present invention;

[0027] Figure 6 For the present invention Figure 2A magnified view of the structure in the middle.

[0028] In the figure: 1. computer; 2. work cover; 3. workbench; 4. glass door; 5. cooling fan; 6. air intake mechanism; 7. laser controller; 8. tension sensor controller; 9. dry plate rack; 10. base; 11. digital microscope; 12. tension sensor; 13. wire clamp; 14. laser; 15. Lloyd mirror; 16. air vent; 17. second sealing door; 18. connecting frame; 601. first sealing door; 602. roller; 603. guide frame; 604. transmission rod; 605. L-shaped plate; 606. electric push rod; 607. second lever; 608. positioning frame; 609. first lever. DETAILED DESCRIPTION

[0029] The technical solution of the present invention will be clearly and completely described below in conjunction with the embodiments. Obviously, the described embodiments are only part of the embodiments of the present invention, rather than all of the embodiments. Based on the embodiments of the present invention, all other embodiments obtained by ordinary technicians in this field without creative work are within the scope of protection of the present invention.

[0030] See also Figure 1-Figure 6 As shown, a solid material measuring device based on Young's modulus includes a workbench 3 and a work cover 2 fixedly installed on the top thereof, a dry plate rack 9 is arranged inside the work cover 2, a Lloyd mirror 15 is fixedly installed on one side of the top of the dry plate rack 9, a wire clamp 13 and a tension sensor 12 are fixedly arranged on the workbench 3 on both sides of the dry plate rack 9, the bottom of the tension sensor 12 is fixedly connected to the workbench 3 through a base 10, the dry plate rack 9 is fixedly connected to the end of the tension sensor 12, and an air intake mechanism 6 for ventilating the work cover 2 is arranged behind the wire clamp 13.

[0031] See also Figure 2 and Figure 3 As shown, the front of the Lloyd's mirror 15 is provided with a digital microscope 11, and the back of the Lloyd's mirror 15 is provided with a laser 14, and the position of the output end of the laser 14 corresponds to the position of the input end of the digital microscope 11; a tension sensor 12 applies tension to one end of the metal wire to be measured, and as the metal wire to be measured is stretched, the Lloyd's mirror 15 moves together with the tension sensor 12, resulting in a change in the distance from the light source of the laser 14 to the Lloyd's mirror 15, so that the distance from the light source of the laser 14 to the Lloyd's mirror 15 becomes larger, and the interference fringes become narrower from wide, and the small displacement is directly measured by the interference of two coherent light beams. This method not only improves the sensitivity of the measurement, but also has a low dependence on environmental conditions.

[0032] See also Figure 1As shown, the air intake mechanism 6 includes an electric push rod 606 fixedly connected to the workbench 3, the extended end of the electric push rod 606 is rotatably provided with a roller 602, the top of the working cover 2 is hinged with a first sealing door 601, and the bottom of the first sealing door 601 is rollingly connected to the roller 602.

[0033] See also Figure 2 and Figure 4 As shown, a positioning frame 608 is fixedly installed on the working cover 2 on one side of the above-mentioned electric push rod 606, one end of the positioning frame 608 is rotatably connected to the L-shaped plate 605, and the extended end of the electric push rod 606 is movably connected to the bottom of the L-shaped plate 605 through the first lever 609.

[0034] See also Figure 2 and Figure 4 As shown, a computer 1 is fixedly installed on the top of the above-mentioned work cover 2, the input end of the computer 1 is electrically connected to the output end of the digital microscope 11, and a cooling fan 5 is fixedly installed on the side of the first sealing door 601 away from the computer 1, and the output end of the cooling fan 5 is arranged toward the computer 1.

[0035] See also Figure 2 , Figure 5 and Figure 6 As shown, the working cover 2 is provided with an air vent 16 on its outer side wall away from the electric push rod 606, and two guide frames 603 are fixedly installed on the top of the inner wall of the working cover 2, and a transmission rod 604 is movably inserted between the two guide frames 603, and the transmission rod 604 is arranged horizontally, and one end of the transmission rod 604 is slidably connected to the top of the L-shaped plate 605 through a second lever 607; when the extended end of the electric push rod 606 is at its shortest, the first sealing door 601 and the second sealing door 17 are in a closed state, preventing external airflow from entering the working cover 2, and ensuring that the airflow in the working cover 2 will not affect Yang's In order to affect the accuracy of modulus measurement, the cooling fan 5 is turned on, so that the airflow blown out can blow air to the computer 1 for heat dissipation. After the measurement is completed, the extended end of the electric push rod 606 is controlled to extend, so that the roller 602 pushes open the first sealing door 601, so that the airflow blown out by the cooling fan 5 can enter the working cover 2. At the same time, the first lever 609 drives the L-shaped plate 605 to rotate, so that the second lever 607 and the transmission rod 604 move horizontally, and the second sealing door 17 is pushed to open by the transmission rod 604, so that the working cover 2 can be ventilated, which can not only quickly cool down, but also avoid the accumulation of toxic gases in the working cover 2.

[0036] See also Figure 6 As shown, a connecting frame 18 is fixedly installed on the inner wall of the working cover 2, a second sealing door 17 for blocking the air vent 16 is hinged on the outer wall of the working cover 2, and a tension spring is fixedly connected between the second sealing door 17 and the connecting frame 18.

[0037] See also Figure 2 and Figure 3 As shown, a laser controller 7 is also provided inside the above-mentioned working cover 2, and the output end of the laser controller 7 is electrically connected to the input end of the laser 14. A tension sensor controller 8 is provided on one side of the laser controller 7, and the input end of the tension sensor controller 8 is electrically connected to the output end of the tension sensor 12.

[0038] See also Figure 1 As shown, two glass doors 4 are hingedly connected to the front of the working cover 2 .

[0039] A working method of a solid material measuring device based on Young's modulus, the working method specifically comprising the following steps:

[0040] Step 1: Fix one end of the metal wire to be tested on the tension sensor 12, aim the laser 14 at the Lloyd's mirror 15, make the two form a certain small angle with each other, ensure the grazing incidence condition of the Lloyd's mirror 15, then fix the other end of the metal wire to be tested on the metal wire clamp 13, and make the lens of the digital microscope 11 face the light source of the laser 14, the light source emits a beam expansion laser, one beam of light is reflected by the Lloyd's mirror 15 to the lens of the digital microscope 11, and the other beam of light is directly emitted to the lens of the digital microscope 11, the two overlap at the lens of the digital microscope 11, there is a certain optical path difference, and the coherence condition is met;

[0041] Step 2: Apply tension to one end of the metal wire to be measured through the tension sensor 12. As the metal wire to be measured is stretched, the Lloyd's mirror 15 moves together with the tension sensor 12, causing the distance from the light source of the laser 14 to the Lloyd's mirror 15 to change, so that the distance from the light source of the laser 14 to the Lloyd's mirror 15 becomes larger, and the interference fringes become narrower. The small displacement is directly measured by the interference of two coherent light beams. This method not only improves the sensitivity of the measurement, but also has a low dependence on environmental conditions;

[0042] Step three: when the extended end of the electric push rod 606 is at its shortest, the first sealing door 601 and the second sealing door 17 are in a closed state, preventing external airflow from entering the working cover 2, ensuring that the airflow in the working cover 2 will not affect the accuracy of the Young's modulus measurement, and turning on the cooling fan 5 so that the blown airflow blows heat to the computer 1. After the measurement is completed, the extended end of the electric push rod 606 is controlled to extend so that the roller 602 pushes open the first sealing door 601, so that the airflow blown out by the cooling fan 5 can enter the working cover 2. At the same time, the first lever 609 drives the L-shaped plate 605 to rotate, so that the second lever 607 and the transmission rod 604 move horizontally, and the second sealing door 17 is pushed to open by the transmission rod 604, so that the working cover 2 is ventilated, which can not only quickly cool down, but also avoid the accumulation of toxic gases in the working cover 2.

[0043] The above description is only a preferred embodiment of the present invention and does not limit the present invention in any form. Although the present invention has been disclosed as a preferred embodiment as above, it is not used to limit the present invention. Any technical personnel in this field can make some changes or modify the technical contents disclosed above into equivalent embodiments without departing from the scope of the technical solution of the present invention. However, any brief modifications, equivalent changes and modifications made to the above embodiments based on the technical essence of the present invention without departing from the content of the technical solution of the present invention are still within the scope of the technical solution of the present invention.

Claims

1. A solid material measuring device based on Young's modulus, comprising a workbench (3) and a work cover (2) fixedly mounted on the top of the workbench, characterized in that: A drying plate rack (9) is arranged inside the working cover (2), a Lloyd's mirror (15) is fixedly installed on one side of the top of the drying plate rack (9), a metal wire clamp (13) and a tension sensor (12) are fixedly arranged on the working tables (3) on both sides of the drying plate rack (9), the drying plate rack (9) is fixedly connected to the end of the tension sensor (12), and an air intake mechanism (6) for ventilating the working cover (2) is arranged behind the metal wire clamp (13).

2. A solid material measuring device based on Young's modulus according to claim 1, characterized in that: A digital microscope (11) is arranged on the front side of the Lloyd's mirror (15), and a laser (14) is arranged on the back side of the Lloyd's mirror (15), wherein the position of the output end of the laser (14) corresponds to the position of the input end of the digital microscope (11).

3. A solid material measuring device based on Young's modulus according to claim 1, characterized in that: The air intake mechanism (6) comprises an electric push rod (606) fixedly connected to the workbench (3), the protruding end of the electric push rod (606) is rotatably provided with a roller (602), the top of the working cover (2) is hinged with a first sealing door (601), and the bottom of the first sealing door (601) is rollingly connected to the roller (602).

4. A solid material measuring device based on Young's modulus according to claim 3, characterized in that: A positioning frame (608) is fixedly mounted on the working cover (2) on one side of the electric push rod (606), one end of the positioning frame (608) is rotatably connected to an L-shaped plate (605), and the extended end of the electric push rod (606) is movably connected to the bottom of the L-shaped plate (605) via a first lever (609).

5. The solid material measuring device based on Young's modulus according to claim 3, characterized in that: A computer (1) is fixedly mounted on the top of the working cover (2); an input end of the computer (1) is electrically connected to an output end of the digital microscope (11); a cooling fan (5) is fixedly mounted on a side of the first sealing door (601) away from the computer (1); an output end of the cooling fan (5) is arranged toward the computer (1).

6. A solid material measuring device based on Young's modulus according to claim 3, characterized in that: An air vent (16) is provided on the outer wall of the working cover (2) away from the electric push rod (606); two guide frames (603) are fixedly installed on the top of the inner wall of the working cover (2); a transmission rod (604) is movably inserted between the two guide frames (603); the transmission rod (604) is arranged horizontally, and one end of the transmission rod (604) is slidably connected to the top of the L-shaped plate (605) through a second shifting rod (607).

7. A solid material measuring device based on Young's modulus according to claim 1, characterized in that: A connecting frame (18) is fixedly mounted on the inner wall of the working cover (2), a second sealing door (17) for blocking the air vent (16) is hingedly mounted on the outer wall of the working cover (2), and a tension spring is fixedly connected between the second sealing door (17) and the connecting frame (18).

8. A working method of a solid material measuring device based on Young's modulus according to any one of claims 1 to 7, characterized in that: The working method specifically comprises the following steps: Step 1: fix one end of the metal wire to be tested on the tension sensor (12), align the laser (14) with the Lloyd's mirror (15), make the two form a certain small angle with each other, ensure the grazing incidence condition of the Lloyd's mirror (15), then fix the other end of the metal wire to be tested on the metal wire clamp (13), and make the lens of the digital microscope (11) face the light source of the laser (14), the light source emits a beam expansion laser, one beam of light is reflected by the Lloyd's mirror (15) to the lens of the digital microscope (11), and the other beam of light is directly emitted to the lens of the digital microscope (11), and the two beams of light overlap at the lens of the digital microscope (11); Step 2: A tension sensor (12) is used to apply tension to one end of the metal wire to be measured. As the metal wire to be measured is stretched, the Lloyd's mirror (15) moves together with the tension sensor (12), causing the distance from the light source of the laser (14) to the Lloyd's mirror (15) to change, so that the distance from the light source of the laser (14) to the Lloyd's mirror (15) becomes larger, and the interference fringes become narrower. The small displacement is directly measured by the interference of two coherent light beams. This method not only improves the sensitivity of the measurement, but also has a low dependence on environmental conditions. Step 3: When the extended end of the electric push rod (606) is at its shortest, the first sealing door (601) and the second sealing door (17) are in a closed state to prevent external airflow from entering the working cover (2). The cooling fan (5) is turned on so that the airflow blown out can cool the computer (1). After the measurement is completed, the extended end of the electric push rod (606) is controlled to extend so that the roller (602) pushes open the first sealing door (601) to facilitate the airflow blown out by the cooling fan (5) to enter the working cover (2). At the same time, the first lever (609) drives the L-shaped plate (605) to rotate, so that the second lever (607) and the transmission rod (604) move horizontally, and the second sealing door (17) is pushed open by the transmission rod (604) to allow ventilation in the working cover (2).

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