Young modulus measuring method and device based on high-precision inclinometer

Abstract

The invention relates to the technical field of Young modulus measurement, and discloses a Young modulus measurement method and device based on a high-precision inclinometer, the device comprises a measurement frame and a support plate slidably sleeving the lower end of the measurement frame, the bottom of the measurement frame is fixedly provided with a base, the support plate is internally provided with a through hole, and the through hole is communicated with the base. An upper clamping block is fixedly arranged at the upper end in the measuring frame, a lower clamping block is arranged on the inner wall of the through hole in a contact mode, a lever frame is arranged above the supporting plate and is of a three-toe-tip T-shaped structure, two rear supporting toe tips are placed in toe tip containing grooves of the supporting plate, the front supporting toe tips are placed on the lower clamping block, and a containing box is arranged at the top of the lever frame. And a high-precision inclinometer is arranged in the placing box. According to the Young modulus measurement based on the high-precision inclinometer, rapid measurement of the stretching amount of the metal wire is completed through dip angle change of rotation of the lever frame caused by descending of the lower clamping block in the stretching process, the measurement convenience of the device is improved, and meanwhile the occupied space of the device is reduced.

Description

Technical Field

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

[0002] Young's modulus is an important mechanical parameter that describes the tensile or compressive resistance of a material within its elastic limit. It is of great significance in studying the mechanical properties of various materials such as metal materials, semiconductors, polymers, ceramics, rubber, etc. It can also be used in mechanical parts design, biomechanics, geology and other fields. Therefore, its accurate measurement is of great significance in scientific research and technological applications. There are many methods for measuring Young's modulus, including stretching method, beam bending method, acoustic resonance method, etc. At the same time, with the development of technology, especially in recent years, some new methods have been developed, such as Hall sensor method, optical fiber sensor method, position sensitive sensor method and thin strain gauge method, etc.

[0003] The traditional optical lever amplification method for measuring Young's modulus requires the operator to adjust the complex optical path and observe the telescope for a long time, which makes the experimental operation more cumbersome and increases the eye strain of the experimenter. At the same time, the overall device occupies a large space, reducing space utilization.

[0004] Therefore, we proposed a high-precision inclinometer-based Young's modulus measurement to solve the above problems. Summary of the invention

[0005] 1. Technical issues to be resolved

[0006] In view of the shortcomings of the prior art, the present invention provides a Young's modulus measurement method and device based on a high-precision inclinometer, which can cooperate with the Young's modulus measurement device and the inclinometer, and complete the measurement of the length stretch of the measured metal wire by receiving the data of the angle tilt of the inclinometer, thereby obtaining the Young's modulus of the measured material. The experimental device improves the convenience of operation, avoids the adjustment process of the complex optical path and the long-term observation of the telescope with the eyes, and reduces the overall space occupied by the device.

[0007] (II) Technical solution

[0008] To achieve the above-mentioned purpose, the present invention provides the following technical solutions: a method and device for measuring Young's modulus based on a high-precision inclinometer, comprising a measuring frame and a support plate slidably sleeved on the lower end of the measuring frame, a base is fixedly provided at the bottom of the measuring frame, a through hole is provided inside the support plate, an upper clamping block is fixedly provided at the upper end of the measuring frame, a lower clamping block is contacted with the inner wall of the through hole, positioning grooves are provided inside the upper clamping block and the lower clamping block, and clamping mechanisms are provided in the two positioning grooves;

[0009] The outer wall of the lower clamping block is provided with a limiting groove, the outer wall of the measuring frame is threadedly provided with a limiting screw, and the rod wall of the limiting screw is threadedly arranged in the limiting groove;

[0010] Two symmetrically arranged vertical rods are fixedly provided at the bottom of the lower clamping block, a bottom plate is fixedly provided at the lower ends of the two vertical rods, and a weight fixing rod is fixedly provided at the top of the bottom plate;

[0011] A lever frame is provided on the top of the support plate, and the lever frame includes a frame body, a lever plate and a placement rod. Two symmetrically arranged support toes are fixedly provided at the bottom of the frame body, and the lever plate is arranged inside the frame body. A fixing bolt is threadedly passed through the lever plate and the frame body. A collar is fixedly provided on the side wall of the lever plate. The placement rod is slidably passed through the inside of the collar. A positioning bolt is threadedly passed through the internal thread of the collar. The bottom of the positioning bolt contacts and cooperates with the rod wall of the placement rod. A placement toe is provided at the front end of the placement rod, and contacts and cooperates with the top of the lower clamping block. A plurality of toe placement grooves for matching the placement of the support toes are opened on the top of the support plate. A placement box is fixedly provided on the top of the lever plate, and a high-precision inclinometer is provided in the placement box.

[0012] A positioning stabilization mechanism for limiting the position of the high-precision inclinometer is arranged inside the placement box.

[0013] Preferably, the clamping mechanism includes an adjusting screw, the adjusting screw thread is arranged on the side of the positioning groove, one end of the adjusting screw is rotatably provided with a pressure block, the pressure block is located in the positioning groove, the positioning groove below is a through groove, the outer wall of the pressure block is in contact with the inner wall of the positioning groove, and the other end of the adjusting screw is fixedly sleeved with a rotating block, which can stably clamp the metal wire and ensure stability during the measurement process.

[0014] Preferably, a guide slide plate for supporting and guiding is fixedly provided at the bottom of the base plate, and the guide slide plate is slidably sleeved on the outer lower end of the measuring frame. As the weight of the weight increases, the movement of the lower clamping block and the stretching of the metal wire can be stably guided and limited.

[0015] Preferably, a threaded hole is provided on the side of the support plate, and a plurality of through holes for sliding through the measuring frame are provided inside the support plate. A positioning screw is passed through the internal thread of the threaded hole. One end of the positioning screw is located in the support plate and is in extrusion contact with the outer wall of the measuring frame. The other end of the positioning screw passes through the threaded hole and is fixed with a driving knob for driving the positioning screw to rotate. The extrusion of the measuring frame by the positioning screw can fix the use height of the support plate.

[0016] Preferably, the lever frame is a "T"-shaped structure consisting of two supporting toes and one placing toe, and the placing toe at the front end of the placing rod can rotate around the two supporting toes on the frame body, so that the lever frame can be stably supported and easily rotated.

[0017] Preferably, the positioning and stabilizing mechanism includes two symmetrically arranged clamping plates, and the inner wall of the placement box is provided with two symmetrically arranged sliding grooves. The lower ends of the clamping plates are located in the sliding grooves and are in contact with and cooperate with the inner walls of the sliding grooves. Springs are provided inside the two sliding grooves, and the two ends of the springs are respectively fixedly connected to the inner walls of the sliding grooves and the clamping plates. Through the elastic force of the springs, the two clamping plates stably clamp the high-precision inclinometer in the placement box, so that the inclinometer does not change position when the lever frame rotates.

[0018] Preferably, the upper ends of the two clamping plates on the adjacent sides are provided with guiding slopes, so that the high-precision inclinometer can stably enter the placement box and be stably clamped by the two clamping plates.

[0019] Preferably, the upper side of the lever frame is arranged parallel to the upper surface of the lower clamping block, so as to ensure that no angle change occurs in the initial state of the inclinometer and to ensure measurement accuracy.

[0020] (III) Beneficial effects

[0021] Compared with the prior art, the present invention provides a Young's modulus measurement based on a high-precision inclinometer, which has the following beneficial effects:

[0022] 1. The Young's modulus measurement method and device based on a high-precision inclinometer, through a measuring frame, a support plate, a positioning screw, a through hole, an upper clamping block, a lower clamping block, a clamping mechanism, a lever frame, a placement box and a high-precision inclinometer, monitors the rotation angle of the lever frame through the high-precision inclinometer to complete the rapid measurement of the wire stretching amount, thereby improving the measurement convenience of the device and reducing the space occupied by the device.

[0023] 2. The Young's modulus measurement method and device based on the high-precision inclinometer can stably support the measurement position of the high-precision inclinometer through the placement box and positioning stabilization mechanism, and try to avoid the inclinometer from jumping or detaching from the lever frame during the measurement process, thereby improving the stability of Young's modulus measurement. BRIEF DESCRIPTION OF THE DRAWINGS

[0024] Figure 1 A schematic diagram of the Young's modulus measurement method and device structure based on a high-precision inclinometer proposed in the present invention;

[0025] Figure 2 for Figure 1 A magnified view of the structure of the local A part;

[0026] Figure 3is a schematic diagram of the three-dimensional structure of the measuring frame;

[0027] Figure 4 for Figure 1 Schematic diagram of the internal structure of the box placed in the middle;

[0028] Figure 5 for Figure 1 Schematic diagram of the three-dimensional structure of the middle lever frame;

[0029] Figure 6 This is a measurement principle diagram of the present invention.

[0030] In the figure: 1 measuring frame, 2 supporting plate, 3 upper clamping block, 4 lower clamping block, 5 limiting screw, 6 vertical rod, 7 bottom plate, 8 weight fixing rod, 9 lever frame, 10 lever plate, 11 placing rod, 12 placing box, 13 high-precision inclinometer, 14 adjusting screw, 15 pressing block, 16 rotating block, 17 guide slide plate, 18 threaded hole, 19 positioning screw, 20 driving knob, 21 clamping plate, 22 spring, 23 supporting toe, 24 frame, 25 fixing bolt, 26 collar, 27 positioning bolt, 28 base. DETAILED DESCRIPTION

[0031] The following will be combined with the drawings in the embodiments of the present invention to clearly and completely describe the technical solutions in the embodiments of the present invention. Obviously, the described embodiments are only part of the embodiments of the present invention, not 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.

[0032] See also Figure 1-6 A Young's modulus measurement method and device based on a high-precision inclinometer, comprising a measuring frame 1 and a support plate 2 slidably sleeved on the lower end of the measuring frame 1, a base 28 is fixedly provided at the bottom of the measuring frame 1, a through hole is provided inside the support plate 2, an upper clamping block 3 is fixedly provided at the upper end of the measuring frame 1, a lower clamping block 4 is contacted with the inner wall of the through hole, positioning grooves are provided inside the upper clamping block 3 and the lower clamping block 4, and clamping mechanisms are provided in the two positioning grooves;

[0033] The outer wall of the lower clamping block 4 is provided with a limit groove, and the outer wall of the measuring frame 1 is threadedly penetrated with a limit screw 5, and the rod wall of the limit screw 5 is threadedly arranged in the limit groove;

[0034] Two symmetrically arranged vertical rods 6 are fixedly provided at the bottom of the lower clamping block 4, a bottom plate 7 is fixedly provided at the lower ends of the two vertical rods 6, a weight fixing rod 8 is fixedly provided at the top of the bottom plate 7, a guide slide 17 is fixedly provided at the bottom of the bottom plate 7, and the guide slide 17 is slidably sleeved on the outer lower end of the measuring frame 1;

[0035] A lever frame 9 is provided on the top of the support plate 2. The lever frame 9 includes a frame body 24, a lever plate 10 and a placement rod 11. Two symmetrically arranged support toes 23 are fixedly provided at the bottom of the frame body 24. The lever plate 10 is arranged inside the frame body 24. A fixing bolt 25 is threadedly penetrated between the lever plate 10 and the frame body 24. A collar 26 is fixedly provided on the side wall of the lever plate 10. The placement rod 11 is slidably penetrated inside the collar 26. A positioning bolt 27 is threadedly penetrated inside the collar 27. The bottom of the positioning bolt 27 is fixedly provided with a fixing bolt 25. The upper side of the lever frame 10 is parallel to the upper surface of the lower clamping block 4.

[0036] Place the upper end of the metal wire in the upper clamp block 3, and place the lower end of the metal wire in the lower clamp block 4, and clamp and fix the position of the metal wire. At this time, the lower clamp block 4 is stably set in the support plate 2 by the penetration of the limit screw 5. After the position of the metal wire is positioned, place the high-precision inclinometer 13 in the placement box 12, and fix the position of the high-precision inclinometer 13. Then, according to the position and specifications of the lower clamp block 4, the supporting toe 23 of the lever frame 9 is placed in the toe placement groove at the corresponding position to determine the position of the lever frame 9. At this time, the bottom toe of the placement rod 11 at the lower end of the lever frame 9 contacts the lower clamp block 4, and the locking of the positioning bolt 27 and the rod wall of the placement rod 11 can adjust the overall measuring arm length of the lever frame 9, and then the limit screw 5 can be removed from the limit groove. The weights are then pulled out from the bottom of the lever frame 9, so that the lower clamping block 4 can slide in the through hole, and then a plurality of weights are sequentially sleeved on the outside of the weight fixing rod 8. The distance between the two vertical rods 6 is designed to be relatively large, so that the weights can be stably placed between the two vertical rods 6, so that the weights can be supported and limited by the two vertical rods 6 and the bottom plate 7, thereby ensuring the stability during the measurement process. As the weight of the weights increases, the guide slide 17 drives the two vertical rods 6 and the lower clamping block 4 to move downward stably, and at the same time, the metal wire is stably stretched. Since the toe of the lever frame 9 is in contact with the top of the lower clamping block 4, as the lower clamping block 4 moves downward, the lever frame 9 tilts. At this time, the high-precision inclinometer 13 can monitor the inclination angle, and complete the rapid detection of the stretching amount of the metal wire through the calculation formula after the measurement work is completed.

[0037] At this time, when adding weights to the weight fixing rod 8 to extend the metal wire, the rear foot of the lever frame 9 drops as the lower clamping block 4 drops, and the high-precision inclinometer 13 displays its angle change. The elongation ΔL of the steel wire can be measured from the changed angle value, thereby calculating the Young's modulus value. When the angle change is small, assuming that the arm length of the lever frame is b, the steel wire elongation ΔL = btgθ≈bθ, and the measurement formula of the Young's modulus is: Therefore, when the weight is increased or decreased, the elongation of the metal wire can be known from the angle measured by the high-precision inclinometer 13, thereby obtaining the Young's modulus of the measured metal wire.

[0038] The measurement formula for Young's modulus In the figure, the inclination angle θ is obtained by the angle value of the inclinometer 13 during the continuous addition and subtraction of weights through the difference method, the force F is the gravity of a single weight 8, L is the original length of the measured wire, the length of the measured wire between the upper clamp block 3 and the lower clamp block 4 is measured by a steel tape measure, D is the diameter of the measured wire, which is obtained by multi-measurement measurement with a screw micrometer, and b is the arm length of the lever frame 9, that is, the vertical distance from the front end toe of the placement rod 11 to the line connecting the two supporting toes of the frame 24, which can be measured by pressing three points on the paper.

[0039] In order to stably position and clamp the wire before measuring, Figure 1-2 As shown, the clamping mechanism includes an adjusting screw 14, which is threaded on the side of the positioning groove. A pressure block 15 is rotatably provided at one end of the adjusting screw 14. The pressure block 15 is located in the positioning groove. The positioning groove below is a through groove. The outer wall of the pressure block 15 is in contact with the inner wall of the positioning groove. A rotating block 16 is fixedly sleeved at the other end of the adjusting screw 14.

[0040] When the two ends of the metal wire are respectively located inside the upper clamping block 3 and the lower clamping block 4, the rotating block 16 can be pushed to make the adjusting screw 14 start to rotate. Since the adjusting screw 14 and the pressing block 15 rotate in cooperation, and the pressing block 15 contacts and cooperates with the inner wall of the positioning groove, when the adjusting screw 14 rotates, the pressing block 15 moves laterally in the positioning groove. Before that, the end of the metal wire can be wound and set on the outside of the pressing block 15, and the remaining part of the winding of the metal wire can be squeezed when the pressing block moves laterally. At this time, the metal wire can be stably squeezed and fixed. At this time, the metal wire passes through the positioning groove to ensure the stability of the metal wire during measurement.

[0041] In order to be able to quickly adjust the measurement height of the support plate 2 according to measurement requirements, such as Figure 2-3As shown, a threaded hole 18 is provided on the side of the support plate 2, and a plurality of through holes for sliding through the measuring frame 1 are provided inside the support plate 2. A positioning screw 19 is passed through the internal thread of the threaded hole 18. One end of the positioning screw 19 is located inside the support plate 2 and is in extrusion contact with the outer wall of the measuring frame 1. The other end of the positioning screw 19 passes through the threaded hole 18 and is fixed with a driving knob 20 for driving the positioning screw 19 to rotate.

[0042] Before the measurement work is carried out, the support plate 2 can be moved longitudinally so that the support plate 2 slides along the measuring frame 2 to adjust the measuring height. When the measuring height is determined, the driving knob 20 can be rotated so that the driving knob 20 drives the positioning screw 19 to rotate, so that the positioning screw 19 rotates in the threaded hole 18 and passes through the threaded hole 18 and contacts the outer wall of the measuring frame 1, so that after the positioning screw 19 squeezes the measuring frame 1, the measuring height of the support plate 2 is fixed under the action of squeezing friction.

[0043] In order to ensure that the position of the high-precision inclinometer 13 does not change randomly during the measurement process, Figure 2 and Figure 4 As shown, the interior of the placement box 12 is provided with a positioning and stabilizing mechanism for limiting the position of the high-precision inclinometer 13, and the positioning and stabilizing mechanism includes two symmetrically arranged clamping plates 21, and the upper ends of the two clamping plates 21 close to each other are provided with guiding inclined surfaces, and the inner wall of the placement box 12 is provided with two symmetrically arranged slide grooves, and the lower ends of the clamping plates 21 are located in the slide grooves and contact and cooperate with the inner walls of the slide grooves, and springs 22 are provided inside the two slide grooves, and the two ends of the spring 22 are fixedly connected to the inner wall of the slide groove and the clamping plates 21 respectively.

[0044] When placing the high-precision inclinometer 13, the bottom of the high-precision inclinometer 13 enters the placement box 12 and cooperates with the guiding inclined surfaces on the upper sides of the two clamping blocks 21, so that the clamping blocks 21 are pushed and slide in the slide grooves 21. When the high-precision inclinometer 13 is located in the placement box 12, the high-precision inclinometer 13 can be stably clamped under the elastic force of the two springs 22, so that when the lever frame 9 tilts, the position of the inclinometer remains unchanged, thereby ensuring the measurement accuracy.

[0045] It should be noted that the term "comprises" or any other variation thereof is intended to cover non-exclusive inclusion, so that a process, method, article, or device that includes a series of elements includes not only those elements, but also includes other elements that are not explicitly listed, or also includes elements inherent to such process, method, article, or device. In the absence of further restrictions, an element defined by the sentence "comprises a ..." does not exclude the presence of other identical elements in the process, method, article, or device that includes the element.

[0046] Although embodiments of the present invention have been shown and described, it will be appreciated by those skilled in the art that various changes, modifications, substitutions and variations may be made to the embodiments without departing from the principles and spirit of the present invention, and that the scope of the present invention is defined by the appended claims and their equivalents.

Claims

1. A method and device for measuring Young's modulus based on a high-precision inclinometer, comprising a measuring frame (1) and a support plate (2) slidably mounted on the lower end of the measuring frame (1), characterized in that: A base (28) is fixedly provided at the bottom of the measuring frame (1), a through hole is provided inside the supporting plate (2), an upper clamping block (3) is fixedly provided at the upper end of the measuring frame (1) to fix the upper end of the metal wire to be measured, a lower clamping block (4) is provided in contact with the inner wall of the through hole to fix the lower end of the metal wire to be measured, positioning grooves are provided inside the upper clamping block (3) and the lower clamping block (4), and clamping mechanisms are provided in the two positioning grooves; The outer wall of the lower clamping block (4) is provided with a limiting groove, the outer wall of the measuring frame (1) is threadedly provided with a limiting screw (5), and the rod wall of the limiting screw (5) is threadedly arranged in the limiting groove; Two symmetrically arranged vertical rods (6) are fixedly provided at the bottom of the lower clamping block (4), a bottom plate (7) is fixedly provided at the lower ends of the two vertical rods (6), and a weight fixing rod (8) is fixedly provided at the top of the bottom plate (7); A lever frame (9) is provided on the top of the support plate (2), and the lever frame (9) comprises a frame body (24), a lever plate (10) and a placement rod (11). Two symmetrically arranged support toes (23) are fixedly provided on the bottom of the frame body (24). The lever plate (10) is arranged inside the frame body (24). A fixing bolt (25) is threadedly penetrated between the lever plate (10) and the frame body (24). A collar (26) is fixedly provided on the side wall of the lever plate (10), and the placement rod (11) is slidably penetrated through the collar. (26), the inner thread of the collar (27) is penetrated by a positioning bolt (27), the bottom of the positioning bolt (27) contacts and cooperates with the rod wall of the placement rod (11), the front end of the placement rod (11) is provided with a placement toe, and contacts and cooperates with the top of the lower clamping block (4), the top of the support plate (2) is provided with a plurality of toe placement grooves for matching the support toe (23), the top of the lever plate (10) is fixedly provided with a placement box (12), and a high-precision inclinometer (13) is arranged in the placement box (12); A positioning stabilization mechanism for limiting the position of the high-precision inclinometer (13) is provided inside the placement box (12).

2. The Young's modulus measurement method and device based on a high-precision inclinometer according to claim 1, characterized in that: The clamping mechanism comprises an adjusting screw (14), wherein the adjusting screw (14) is threadedly arranged on the side of the positioning groove, and a pressing block (15) is rotatably arranged at one end of the adjusting screw (14), and the pressing block (15) is located in the positioning groove, and the positioning groove below is a through groove, and the outer wall of the pressing block (15) contacts and cooperates with the inner wall of the positioning groove, and a rotating block (16) is fixedly sleeved at the other end of the adjusting screw (14).

3. The Young's modulus measurement method and device based on a high-precision inclinometer according to claim 1, characterized in that: A guide slide plate (17) for supporting and guiding is fixedly provided at the bottom of the base plate (7), and the guide slide plate (17) is slidably sleeved on the outer lower end of the measuring frame (1).

4. The Young's modulus measurement method and device based on a high-precision inclinometer according to claim 1, characterized in that: A threaded hole (18) is provided on the side of the support plate (2), and a plurality of through holes are provided inside the support plate (2) for slidingly passing through the measuring frame (1). A positioning screw (19) is threadedly passed through the internal thread of the threaded hole (18), and one end of the positioning screw (19) is located inside the support plate (2) and is pressed and contacted with the outer wall of the measuring frame (1), and the other end of the positioning screw (19) passes through the threaded hole (18) and is fixed with a driving knob (20) for driving the positioning screw (19) to rotate.

5. The Young's modulus measurement method and device based on a high-precision inclinometer according to claim 1, characterized in that: The lever frame (9) is a "T"-shaped structure consisting of two supporting toes and one placing toe.

6. The Young's modulus measurement method and device based on a high-precision inclinometer according to claim 1, characterized in that: The positioning and stabilizing mechanism comprises two symmetrically arranged clamping plates (21), the inner wall of the placement box (12) is provided with two symmetrically arranged sliding grooves, the lower ends of the clamping plates (21) are located in the sliding grooves and are in contact with the inner walls of the sliding grooves, and springs (22) are arranged inside the two sliding grooves, and the two ends of the springs (22) are respectively fixedly connected to the inner walls of the sliding grooves and the clamping plates (21).

7. The method and device for measuring Young's modulus based on a high-precision inclinometer according to claim 6, characterized in that: The upper ends of the two clamping plates (21) on one side close to each other are both provided with a guiding inclined surface.

8. The Young's modulus measurement method and device based on a high-precision inclinometer according to claim 1, characterized in that: The upper side of the lever frame (9) is arranged parallel to the upper surface of the lower clamping block (4).

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