Young modulus measuring device and measuring method

Abstract

The invention relates to a Young modulus measuring device and measuring method.The measuring device comprises an optical lever optical amplification system and a large and small container equal-volume liquid amplification system, the amplification factor is improved, and therefore the accuracy of a measuring result is effectively improved; the layout that a tester and a scale telescope need to be separately arranged on two desks in a traditional optical lever method is abandoned, the problems that the traditional method occupies a large space and is limited by the space of a laboratory are thoroughly solved, and the method is suitable for small and medium-sized laboratories and teaching scenes where multiple groups of experiments are parallel; and meanwhile, the operation difficulty is reduced, the measurement efficiency and the experiment stability are effectively improved, and the equipment maintenance cost is also reduced.

Description

TECHNICAL FIELD

[0001] The present application relates to the technical field of physical experiment instruments, in particular to a Young's modulus measuring device and a measuring method. BACKGROUND

[0002] As a key physical quantity representing the compression and tensile resistance of materials within the elastic limit, Young's modulus has irreplaceable importance in the engineering field, and its accurate determination plays a decisive role in material selection, structure design, engineering quality evaluation and many other aspects. In physical experiment devices, especially in mechanical experiment devices, the determination of the Young's modulus of steel wire rope is a basic and core experimental content.

[0003] At present, in the experimental operation of determining the Young's modulus of steel wire rope, the optical lever method is the mainstream method widely used in the industry. The experimental principle of this method requires the use of two core instruments, Young's modulus tester and scale telescope, and to ensure the measurement effect, the distance between the two is usually controlled at about 1.5m. Limited by the space conditions of the experimental site, the distance between the two is generally not more than 1.5m in actual operation. If the optical lever constant is set to 6cm, according to the calculation formula of the magnification of the optical lever method, the magnification can only reach 50 times at most, which limits the further improvement of the measurement accuracy to some extent.

[0004] From the experimental site arrangement, in order to facilitate experimental debugging and observation, the Young's modulus tester and the scale telescope are usually placed on two separate tables, or placed at the two ends of a long experimental table. This arrangement not only makes the experimental device occupy a larger area of the site, increasing the difficulty of selecting the experimental site, but also brings many inconveniences and risks in the experimental process. In order to complete the instrument adjustment, experimental observation and data measurement, the operator needs to frequently go back and forth between the two instruments. In this process, the operator accidentally touches the table where the instrument is placed from time to time. The slight shaking of the table may cause the instrument position to deviate, the light path to deviate from the preset state, and even cause the whole experiment to be in vain, resulting in experimental failure, which greatly affects the experimental efficiency and the reliability of the experimental results.

[0005] In addition, the light lever method requires high adjustment of the light path before the formal measurement, and the experimenter needs to spend a lot of time and effort to adjust the relative positions of the telescope, the light lever small mirror and the scale to ensure that the three can accurately meet the incident and reflection relationship of object-mirror-image, so that the experimenter can clearly observe the reflection image of the scale on the light lever small mirror through the telescope. This adjustment process not only requires high operating skill of the experimenter, but also takes a long time, further reducing the overall efficiency of the experiment. At the same time, during the experimental operation, due to the lack of sufficient cognition of the operation specification of the precision instrument by some experimental operators, or the operation is too rough, the damage to the telescope as a precision instrument is common. The damage of the telescope not only causes the interruption of the experiment, but also needs to invest a lot of funds for repair or replacement, which significantly increases the maintenance cost of the experiment, and brings a large economic burden to the development of experimental teaching or scientific research.

[0006] In summary, the current experimental method for measuring the Young's modulus of the steel wire rope by the light lever method has obvious deficiencies in site occupation, operation convenience, experimental stability, adjustment efficiency and instrument maintenance cost, and a new experimental device or method is needed to effectively solve the above problems to meet the demand for efficient, accurate and low-cost measurement of the Young's modulus of the steel wire rope in experimental teaching and engineering practice. SUMMARY

[0007] Therefore, the technical problem to be solved by the present application is to overcome the problem that the experimental method for measuring the Young's modulus of the steel wire rope by the light lever method in the prior art has obvious deficiencies in site occupation, operation convenience, experimental stability, adjustment efficiency and instrument maintenance cost.

[0008] To solve the above technical problems, the present application provides a Young's modulus measuring device, comprising,

[0009] a material placing table horizontally arranged;

[0010] a first amplification assembly comprising a support, a fixed platform, a light lever, a circular table, a weight disc and a light source, the support being connected to the top of the material placing table, the fixed platform being horizontally connected to the support, a through hole being vertically arranged on the fixed platform, the circular table being slidingly connected to the through hole, the front foot of the light lever being arranged on the top of the fixed platform, the rear foot of the light lever being arranged on the top of the circular table, one end of the steel wire rope being connected to the top of the support, the other end of the steel wire rope penetrating through the circular table and being connected to the weight disc, the steel wire rope being fixedly connected to the circular table, and a plurality of weights being arranged on the weight disc; the light source being arranged on one side of the support, and the output end of the light source facing the light lever;

[0011] The secondary amplification assembly comprises a lifting platform, a large container, a small container and a light sensor. The lifting platform is arranged on the storage table and located at one side of the support. The large container is placed on the lifting platform. A first light transmission area is arranged on the side of the large container facing the light lever. A second light transmission area corresponding to the position of the first light transmission area is arranged on the side of the large container away from the light lever. The light sensor is arranged on the second light transmission area and the sensing end thereof faces the first light transmission area. The small container contains a liquid that is not transparent to light. The small container is used to input liquid into the large container or receive liquid flowing out of the large container.

[0012] Preferably, a first liquid outlet pipe for outputting liquid into the large container is arranged on the small container. A first electromagnetic valve is arranged on the first liquid outlet pipe. A second liquid outlet pipe for inputting liquid into the small container is arranged on the large container. A second electromagnetic valve is arranged on the second liquid outlet pipe.

[0013] Preferably, a controller is arranged. The controller is connected to the first electromagnetic valve, the second electromagnetic valve and the light sensor respectively.

[0014] Preferably, the large container and the small container are both cylindrical structures with openings at the top. The bottom area of the large container is larger than that of the small container.

[0015] Preferably, a scale line is arranged on the small container.

[0016] Preferably, the support comprises two vertical columns connected to the storage table. A crossbeam is vertically connected between the two vertical columns near the top of the crossbeam. A first clamp is arranged on the crossbeam. A second clamp is arranged on the weight disc. The two ends of the steel wire rope are connected to the first clamp and the second clamp respectively.

[0017] Preferably, a fixed platform is horizontally connected between the two vertical columns. A circular through hole is formed in the fixed platform. A circular table is a cylindrical structure matching the size of the through hole. A through hole is arranged on the circular table for the steel wire rope to pass through and be fixed.

[0018] Preferably, a light source frame is arranged on the storage table at one side of the support. The light source is installed on the light source frame.

[0019] A measurement method for measuring the Young's modulus of a steel wire rope by using the Young's modulus measuring device according to any one of the above embodiments. The method comprises the following steps:

[0020] Length measurement:

[0021] First, measure the length L of the steel wire, the diameter d of the steel wire, the bottom area S of the large container and the small container S big and S small, the optical lever constant Z, and the distance D between the plane mirror of the optical lever and the large container, and record them in the data table;

[0022] Optical path adjustment:

[0023] By adjusting the angle of the plane mirror of the optical lever, the height and position of the light source, and the height and angle of the large container, the light emitted by the light source is incident on the plane mirror of the optical lever, and the reflected light can be incident on the light sensor after passing through the large container through the first light transmission area;

[0024] Reading measurement:

[0025] Power is supplied to each component of the secondary amplification assembly, when the light sensor senses light, the liquid in the small container starts to input into the large container, and stops when the liquid level in the large container blocks the light, and the liquid level of the small container is read Then a predetermined number of weights are added to the weight disc one by one, and the liquid level of the small container is read after each weight is added And record in the table;

[0026] Then take out the weights on the weight disc one by one until one is left, and the liquid in the large container flows back to the small container after each weight is removed, and stops when the liquid level in the large container cannot block the light, and the liquid level of the small container is read in turn , recorded in the table;

[0027] Calculation:

[0028] According to the formula / mm, / (N / m 2 ) to obtain the Young's modulus.

[0029] Preferably, in the reading measurement step, the liquid level is read after the liquid level is stable.

[0030] The above technical scheme of the present application has the following beneficial effects compared with the prior art:

[0031] The Young's modulus measuring device and measuring method provided by the present application improve the amplification ratio by setting the optical lever optical amplification and large and small container equal volume liquid amplification two-stage amplification system, thereby effectively improving the accuracy of the measurement result; and the layout of the traditional optical lever method needs to place the measuring instrument and the scale telescope on two tables, which completely solves the problem of large occupation of space by the traditional method and the restriction of laboratory space, and adapts to small and medium-sized laboratories and multiple experiments in parallel teaching scenes; at the same time, the difficulty of operation is reduced, the measurement efficiency and experimental stability are effectively improved, and the equipment maintenance cost is also reduced. BRIEF DESCRIPTION OF DRAWINGS

[0032] In order to make the content of the present application more easily understood, the present application is further described in detail below according to specific embodiments of the present application and in conjunction with the accompanying drawings, in which

[0033] Figure 1 is a structural schematic diagram of a first amplification assembly of a Young's modulus measuring device of a preferred embodiment of the present application;

[0034] Figure 2 is a structural schematic diagram of a second amplification assembly of a Young's modulus measuring device of a preferred embodiment of the present application.

[0035] The description of the drawing marks is as follows: 1, a material placing table; 2, a first amplification assembly; 21, a support; 211, a vertical column; 212, a crossbeam; 22, a fixed platform; 23, an optical lever; 24, a circular table; 25, a weight disc; 26, a light source; 27, a weight; 28, a first clamp; 29, a second clamp; 3, a second amplification assembly; 31, a lifting table; 32, a large container; 321, a second liquid outlet pipe; 322, a second electromagnetic valve; 33, a small container; 331, a first liquid outlet pipe; 332, a first electromagnetic valve; 34, a light sensor. DETAILED DESCRIPTION

[0036] The present application is further described below in conjunction with the accompanying drawings and specific embodiments, so that those skilled in the art can better understand the present application and implement it, but the embodiments are not intended to limit the present application.

[0037] Embodiment one, referring to Figure 1 and Figure 2 , a Young's modulus measuring device of the present application comprises,

[0038] a material placing table 1, which is horizontally arranged;

[0039] a first amplification assembly 2, which comprises a support 21, a fixed platform 22, an optical lever 23, a circular table 24, a weight disc 25 and a light source 26, the support 21 is connected to the top of the material placing table 1, the fixed platform 22 is horizontally connected to the support 21, a through hole is vertically arranged on the fixed platform 22, the circular table 24 is slidingly connected in the through hole, the front foot of the optical lever 23 is placed on the top of the fixed platform 22, the rear foot is placed on the top of the circular table 24, one end of a steel wire rope A is connected to the top of the support 21, the other end penetrates through the circular table 24 and is connected to the weight disc 25, the steel wire rope is fixedly connected with the circular table 24, and a plurality of weights 27 are arranged on the weight disc 25; the light source 26 is arranged on one side of the support 21, and the output end of the light source 26 faces the optical lever 23;

[0040] The secondary amplification assembly 3 comprises a lifting platform 31, a large container 32, a small container 33 and a light sensor 34. The lifting platform 31 is arranged on the storage platform 1 and located at one side of the support 21. The large container 32 is placed on the lifting platform 31. The large container 32 is provided with a first light transmission area on the side facing the light lever 23, and a second light transmission area corresponding to the position of the first light transmission area on the side away from the light lever 23. The light sensor 34 is arranged on the second light transmission area and its sensing end faces the first light transmission area. The small container 33 contains a non-transparent liquid. The small container 33 is used to input liquid into the large container 32 or to receive the liquid flowing out of the large container 32.

[0041] Specifically, the support 21 is vertically arranged on the table top of the storage platform 1. The fixed platform 22 is horizontally arranged at the middle position of the support 21. The circular table 24 is gap-fitted with the through hole vertically arranged on the fixed platform 22 and can slide in the through hole. One end of the steel wire rope is connected with the crossbeam 212 of the support 21, and the other end vertically extends downward, penetrates through the circular table 24 and is connected with the weight disc 25. The circular table 24 is fixedly connected with the steel wire rope. The light lever 23 comprises a tripod and a plane mirror mounted on the tripod. Two front feet of the tripod are placed on the table top of the fixed platform 22, and the rear foot is placed on the top of the circular table 24. When the weight 27 is placed on the weight disc 25, the steel wire rope is stretched, the circular table 24 is lowered by a certain height along with the stretched steel wire rope, and the rear foot of the light lever 23 is also lowered by a predetermined height along with the circular table 24. The light source 26 is arranged on one side of the support 21 through a light source frame. The output end of the light source 26 faces the plane mirror. The height and angle of the light source 26 can be adjusted.

[0042] The lifting platform 31 is arranged on the storage platform 1. The height of the table top of the lifting platform 31 can be adjusted. The large container 32 is arranged on the table top of the lifting platform 31. The large container 32 is a non-transparent container. The front and back sides (i.e. the side close to the light lever 23 and the side away from the light lever 23) of the large container are respectively provided with a first light transmission area and a second light transmission area corresponding to each other. The light sensor 34 is arranged on the second light transmission area of the back side of the large container 32. The side of the large container 32 is provided with a second liquid outlet pipe 321. The second electromagnetic valve 322 is arranged on the second liquid outlet pipe 321.

[0043] The bottom area of the small container 33 is smaller than that of the large container 32, and the first liquid outlet pipe 331 is arranged on the side surface of the small container 33, and the first electromagnetic valve 332 is arranged on the first liquid outlet pipe 331. During the stage of adding the weight 27 to the weight disc 25, the first electromagnetic valve 332 normally works, the second electromagnetic valve 322 does not work, the small container 33 is placed on the top of the large container 32, the pipe opening of the first liquid outlet pipe 331 arranged on the small container 33 is aligned with the opening on the top of the large container 32, the light emitted by the light source 26 is sensed by the light sensor 34 after passing through the first light transmission area and the inside of the large container 32, the first electromagnetic valve 332 is opened, the lightproof liquid in the small container 33 flows into the large container 32, and when the lightproof liquid flowing into the large container 32 rises to a certain height, the light is blocked, so that the light sensor 34 cannot sense the light emitted by the light source 26, at this time, the first electromagnetic valve 332 is closed; when the weight 27 is added to the weight disc 25 again, the steel wire is stretched, the plane mirror rotates with the descent of the circular table 24, the angle of the light emitted by the light source 26 changes (rotates upward), so that the light sensor 34 can sense the light again, the first electromagnetic valve 332 is opened, the lightproof liquid in the small container 33 flows into the large container 32 again, and the above process is repeated for several times, so as to collect the multiple different height data of the liquid surface in the small container 33.

[0044] During the stage of reducing the weight on the weight disc 25, the second electromagnetic valve 322 normally works, the first electromagnetic valve 332 does not work, and the small container 33 is placed on the placement table 1, and the opening on the top of the small container 33 is aligned with the pipe opening of the second liquid outlet pipe 321 arranged on the large container 32. After removing one weight 27 on the weight disc 25, the angle of the light emitted by the light source 26 changes (rotates downward), the position of the light emitted by the light source 26 is lower than that of the liquid surface in the large container 32, the light sensor 34 cannot sense the light, the second electromagnetic valve 322 is opened, the liquid flows back from the large container 32 to the small container 33, until the height of the liquid surface in the large container 32 is lowered to the position at which the light sensor 34 can sense the light, the second electromagnetic valve 322 is closed; then the weight 27 is reduced in turn, and the above process is repeated, so as to collect the multiple different height data of the liquid surface in the small container 33.

[0045] Further, the small container 33 is provided with a first liquid outlet pipe 331 for outputting liquid into the large container 32, and the first liquid outlet pipe 331 is provided with a first electromagnetic valve 332. The large container 32 is provided with a second liquid outlet pipe 321 for inputting liquid into the small container 33, and the second liquid outlet pipe 321 is provided with a second electromagnetic valve 322. Specifically, the working processes of the first electromagnetic valve 332 and the second electromagnetic valve 322 are opposite. When the light sensor 34 senses laser, the first electromagnetic valve 332 is opened, and the second electromagnetic valve 322 is closed. When the light sensor 34 does not sense laser, the first electromagnetic valve 332 is closed, and the second electromagnetic valve 322 is opened. It should be noted that the first electromagnetic valve 332 and the second electromagnetic valve 322 act independently, i.e. in the stage of reducing the weight 27, the second electromagnetic valve 322 normally works, and the first electromagnetic valve 332 does not work. When the weight 27 is increased, the first electromagnetic valve 332 normally works, and the second electromagnetic valve 322 does not work.

[0046] Further, a controller is included, and the controller is connected to the first electromagnetic valve 332, the second electromagnetic valve 322 and the light sensor 34 respectively. The automatic control of the electromagnetic valves is realized through the controller.

[0047] Further, the large container 32 and the small container 33 are both cylindrical structures with openings at the top, and the bottom area of the large container 32 is larger than that of the small container 33. Specifically, the large container 32 and the small container 33 can adopt cylindrical structures with rectangular cross sections, and the bottom area is calculated by measuring the length and width of the container.

[0048] Further, the small container 33 is provided with a scale.

[0049] Further, the support 21 includes two vertical columns 211 connected to the storage table 1, and a cross beam 212 is vertically connected between the two vertical columns 211 near the top of the two vertical columns 211. The cross beam 212 is provided with a first clamp 28, and the weight disc 25 is provided with a second clamp 29. The two ends of the steel wire rope are connected to the first clamp 28 and the second clamp 29 respectively. Specifically, the two ends of the steel wire rope to be measured are clamped and fixed by the first clamp 28 and the second clamp 29 respectively, so that the steel wire rope to be measured is stretched straight.

[0050] Further, a fixed platform 22 is horizontally connected between the two vertical columns 211, and the fixed platform 22 is provided with a circular through hole. The circular table 24 is a cylindrical structure matching the size of the through hole, and the circular table 24 is provided with a through hole for the steel wire rope to pass through and be fixed. Specifically, the connection between the steel wire rope and the circular table 24 can be achieved by interference fit between the steel wire rope and the through hole, or a clamp can be provided on the circular table 24 to connect with the steel wire rope.

[0051] Further, the storage platform 1 is provided with a light source frame on one side of the support 21, and the light source 26 is installed on the light source frame. The light source 26 can be a laser light source.

[0052] A measurement method for measuring the Young's modulus of a steel wire rope by using the Young's modulus measuring device according to any one of the above, characterized by comprising the steps of,

[0053] Length measurement:

[0054] After the steel wire rope is installed, a weight of a predetermined weight is placed on the weight disc 25 to make the steel wire rope straight and tight, the length L of the steel wire rope is measured by a meter ruler, the diameters of the steel wire rope at a plurality of different positions are measured by a screw micrometer and an average value is calculated to obtain the diameter d (for example, 6 different positions can be measured), the length l and the width w of the large container 32 and the small container 33 are measured by a vernier caliper, so as to calculate the bottom areas S of the large container 32 and the small container 33, the light lever constant Z (i.e. the vertical distance between the front foot and the rear foot) and the distance D between the plane mirror of the light lever 23 and the front face of the large container 32 are measured by the vernier caliper, and are recorded in a data table;

[0055] Optical path adjustment: the angle of the plane mirror of the light lever 23, the height and position of the light source, and the height and angle of the large container 32 are adjusted, so that the light emitted by the light source 26 can be reflected on the plane mirror of the light lever 23, and the reflected light can be irradiated on the light sensor 34 after passing through the large container 32 through the first light transmission area;

[0056] Reading measurement:

[0057] The circuit power supply is turned on to supply power to each component of the secondary amplification assembly 3, at this time the light sensor 34 senses the light, the first electromagnetic valve 332 of the small container 33 is opened, and the light-proof liquid in the small container 33 starts to be input into the large container 32, until the liquid level in the large container 32 rises to block the light, the light sensor 34 cannot sense the light, the first electromagnetic valve 332 is closed, the liquid level h1ˋ of the small container 33 at this time is read and recorded, then a weight 27 is added on the weight disc 25, the steel wire rope is stretched , the circular platform 24 also descends , and the rear foot of the light lever 23 descends with the circular platform 24 At this time, the plane mirror of the optical lever 23 turns a small angle θ, and the normal line of the plane mirror also turns an angle θ, so that the reflected light turns 2θ upward (i.e. counterclockwise), and the position of the light is higher than the liquid level in the large container 32, the light again passes through the large container 32 and irradiates on the light sensor 34, the first electromagnetic valve 332 is opened again, and the lightproof liquid in the small container 33 flows into the large container 32 again until the liquid level in the large container 32 blocks the light again, the first electromagnetic valve 332 is closed, and the liquid level h2' of the small container 33 is recorded; then a number of weights 27 are continuously added one by one, and the liquid levels h3', h4', … of the small container 33 are recorded.

[0058] Then one weight 27 on the weight disc 35 is removed, at this time the reflected light turns 2θ downward (i.e. clockwise), and the position of the light is lower than the original liquid level in the large container 32, the light sensor cannot sense the light, the second electromagnetic valve 322 of the large container 32 is opened, and the lightproof liquid in the large container 32 flows back into the small container 33 from the large container 32, when the liquid level drops to the point that the light sensor 34 can sense the light, the second electromagnetic valve 322 is closed, and the liquid level of the small container 33 is recorded, then the weights 27 are continuously reduced one by one, and the liquid levels … h4'', h3'', h2'', h1'' of the small container 33 are recorded.

[0059] Calculation:

[0060] According to the formula / mm, / (N / m 2 ) to obtain the Young's modulus. (hi takes the average of the corresponding and )

[0061] Table 1 Original data and calculation table of examples

[0062]

[0063] Further, in the reading measurement step, the liquid level height indication is read after the liquid level is stable, for example, the liquid level height indication can be read after the liquid flow is cut off and a predetermined time is set.

[0064] Comparative Example 1 provides a comparative example, the comparative example uses the existing optical lever method to measure the Young's modulus, which specifically includes the following steps:

[0065] Length measurement: first, place a weight with a mass of 0.36 kg on the weight disc, pull the steel wire straight and taut, and measure the original length of the steel wire with a meter ruler , measure the optical lever constant Z with a vernier caliper, measure the distance D between the optical lever and the telescope with a meter ruler, and measure the diameter of the steel wire with a screw micrometer , record to the data table.

[0066] Optical path system adjustment: the two forelegs of the optical lever are placed in the groove of the workpiece platform, and the hind leg is placed on the plane of the lower chuck. Adjust the plane of the plane mirror to be perpendicular to the tabletop, and adjust the telescope tube to be the same height as the plane mirror, so that the telescope tube is perpendicular to the plane mirror. Preliminary search for the image of the scale. Directly observe the plane mirror reflection from the outside of the telescope tube with the eyes, and see if there is an image of the scale in the mirror. If not, move the telescope scale frame left and right while observing the plane mirror until the image of the scale is seen in the plane mirror; adjust the telescope to find the image of the scale. First, adjust the telescope eyepiece to see a clear crosshair; then adjust the focusing handwheel so that the scale image is on the crosshair plane and is clear; adjust the plane mirror surface so that it is perpendicular to the optical axis of the telescope, and the horizontal line of the crosshair of the telescope is just pressed on the zero scale line or close to the zero scale.

[0067] Reading: read the position reading of the crosshair on the scale, then put each mass of 0.36 kg on the weight disc one by one, read the position reading of the crosshair on the scale in turn, a total of 5 weights, get 6 position readings , record in the table, then read the position reading of the crosshair on the scale in turn by reducing the weight, until only one weight is left on the weight disc, get 5 position readings , record in the table.

[0068] Calculation: calculate , find the Young's modulus, and calculate the relative error.

[0069] Table 2 Comparison of raw data and calculation table of comparative experiment

[0070]

[0071] Table 3 Comparison table of results of example 1 and comparative example

[0072]

[0073] From the above result comparison, it can be seen that the Young's modulus measuring device and measuring method have higher measurement accuracy.

[0074] Obviously, the above embodiments are only examples for clarity, and are not limiting to the embodiments. For ordinary skilled in the art, other different forms of changes or variations can be made on the basis of the above description. Here, it is not necessary and impossible to exhaust all embodiments. The obvious changes or variations derived therefrom are still within the protection scope of the present application.

Claims

1. A Young's modulus measuring device for measuring the Young's modulus of a steel wire rope, characterized in that: include, The shelf is horizontally positioned. A primary amplification component includes a support, a fixed platform, an optical lever, a frustum, a weight pan, and a light source. The support is connected to the top of the platform, and the fixed platform is horizontally connected to the support. A through hole is vertically opened on the fixed platform, and the frustum is slidably connected in the through hole. The front leg of the optical lever is placed on the top of the fixed platform, and the rear leg is placed on the top of the frustum. One end of a steel wire rope is connected to the top of the support, and the other end passes through the frustum and connects to the weight pan. The steel wire rope is fixedly connected to the frustum, and several weights are arranged on the weight pan. The light source is located on one side of the support, and the output end of the light source faces the optical lever. A secondary amplification component includes a lifting platform, a large container, a small container, and a photosensor. The lifting platform is mounted on a shelf and located on one side of a support. The large container is placed on the lifting platform. A first light-transmitting area is provided on the side of the large container facing the light lever, and a second light-transmitting area is provided on the side away from the light lever, corresponding to the position of the first light-transmitting area. The photosensor is disposed on the second light-transmitting area with its sensing end facing the first light-transmitting area. The small container contains an opaque liquid and is used to input liquid into the large container or to receive liquid flowing out of the large container.

2. The Young's modulus measuring device according to claim 1, characterized in that: The small container is provided with a first outlet pipe for outputting liquid into the large container, and a first solenoid valve is provided on the first outlet pipe. The large container is provided with a second outlet pipe for inputting liquid into the small container, and a second solenoid valve is provided on the second outlet pipe.

3. The Young's modulus measuring device according to claim 2, characterized in that: It includes a controller, which is connected to the first solenoid valve, the second solenoid valve, and the photosensor.

4. The Young's modulus measuring device according to claim 1, characterized in that: Both the large and small containers are cylindrical structures with openings at the top, and the bottom area of ​​the large container is larger than that of the small container.

5. The Young's modulus measuring device according to claim 1, characterized in that: The small container is equipped with scale lines.

6. The Young's modulus measuring device according to claim 1, characterized in that: The support includes two columns vertically connected to the platform, and a crossbeam is vertically connected between the two columns near their top. A first clamp is provided on the crossbeam, and a second clamp is provided on the weight pan. The two ends of the steel wire rope are respectively connected to the first clamp and the second clamp.

7. The Young's modulus measuring device according to claim 1, characterized in that: The fixed platform is horizontally connected between the two columns. The fixed platform has a circular through hole. The truncated cone is a cylindrical structure that matches the size of the through hole. The truncated cone has a through hole for the steel wire rope to pass through and be fixed.

8. The Young's modulus measuring device according to claim 1, characterized in that: The shelf is provided with a light source frame located on one side of the support, and the light source is mounted on the light source frame.

9. A measurement method for measuring the Young's modulus of a steel wire rope using the Young's modulus measuring device as described in any one of claims 1-8, characterized in that: Includes the following steps, Length measurement: First, measure the length L of the steel wire, the diameter d of the steel wire, the base areas S_large and S_small of the large and small containers, the optical lever constant Z, and the distance D between the plane mirror of the optical lever and the large container, and record them in the data table. Optical path adjustment: By adjusting the angle of the plane mirror of the light lever, the height and position of the light source, and the height and angle of the large container, the light emitted from the light source shines on the plane mirror of the light lever, and the reflected light passes through the first light-transmitting area and through the large container to shine on the light sensor. Reading measurement: Power is supplied to the components of the secondary amplification assembly. When the photosensor detects light, liquid begins to flow from the small container into the large container until the liquid level in the large container blocks the light, at which point the liquid level is read from the small container. Then, a predetermined number of weights are added one by one to the weight pan. After each weight is added, the liquid level in the small container is read. And record it in the table; Next, remove the weights one by one from the weight pan until only one remains. After each weight is removed, the liquid in the large container flows back into the small container, continuing until the liquid level in the large container no longer blocks the light. Then, read the liquid level in the small containers sequentially. Record it in the table; calculate: According to the formula / mm, / (N / m 2 Young's modulus is obtained.

10. The measurement method according to claim 9, characterized in that: During the reading and measurement process, the liquid level should be read after the liquid level has stabilized.

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