Loading Structural Member Deformation Measurement Device and Measurement Method

Abstract

The present invention provides a deformation measurement device and a measurement method for a loading structural member. The measurement device includes a transmission body, a first magnetic field body, and a sensor. The transmission body is connected to a load, and the load is installed on the structural member. The deformation or strain of the structural member can drive the first magnetic field body to move. The sensor is used to detect the displacement generated by the movement of the first magnetic field body. When the load is applied to the structural member, the structural member generates deformation or strain, which in turn causes the transmission body to drive the first magnetic field body to move. The magnetic field intensity around the sensor changes, which can cause the piezoelectric body to generate an electrical signal corresponding to the deformation or strain, thereby realizing the detection of the amount of deformation or strain. The present invention can realize the detection of the deformation or strain generated by the structural member due to loading during the installation process, thereby providing a numerical quantification basis for ideal assembly or stress distribution, controlling the assembly process to achieve the optimal assembly, and can be realized in a variety of structural ways, with strong practicability.

Description

Technical Field

[0001] The present invention relates to the field of measurement technology, and in particular, to a deformation measurement device and method for a loading structural member. Background Art

[0002] During the process of increasing the heavy load of a large structural member, due to the change of the applied load, the installation support structural member generates quasi-static or dynamic strain or deformation during the assembly process. This deformation amount is often tiny, but it can cause a change in the stress distribution of the overall installation structure, resulting in problems such as inconsistent deformation of the structure.

[0003] Currently, since it is impossible to monitor this type of deformation (often extremely tiny deformation) in real time, it is also impossible to achieve real-time installation regulation of heavy load components or equipment. The loading stress distribution often fails to meet the design requirements, ultimately making the regulation process complex, with a large amount of repetitive work, and the regulation efficiency is extremely low. In some cases, since the structural deformation amount is uncertain at the initial installation, it ultimately affects the normal use of large equipment or the entire system or affects the service life of the equipment.

[0004] Patent document CN104215193A discloses a method and system for measuring the deformation of an object surface. Among them, a method for measuring the deformation of an object surface includes: determining the three-dimensional topography data of the object surface to be measured; determining the original deformation measurement data of the object surface to be measured through laser speckle interferometry; and correcting the deformation measurement data according to the three-dimensional topography data to obtain the final three-dimensional deformation distribution data of the object surface to be measured. However, this method cannot obtain accurate deformation data when the outer shape of the measured structural member is blocked by heavy objects or parts, which affects the detection result. Summary of the Invention

[0005] Aiming at the defects in the prior art, the purpose of the present invention is to provide a deformation measurement device and method for a loading structural member.

[0006] According to a deformation measurement device for a loading structural member provided by the present invention, it includes:

[0007] A transmission body, which is connected to a load, and the load is installed on a structural member;

[0008] A first magnetic field body, the deformation or strain of the structural member can cause the first magnetic field body to move;

[0009] A sensor, which is used to detect the displacement generated by the first magnetic field body due to movement.

[0010] Preferably, the first magnetic field body adopts any one of the following connection structures:

[0011] - The first magnetic field body is installed at the end of the transmission body and is arranged at a gap with the sensor;

[0012] - It further includes a connecting lever and a support member. One end of the connecting lever is movably engaged with the other end of the transmission body. The other end of the connecting lever is provided with the first magnetic body. The first magnetic body is arranged at a gap with the sensor. The support member is movably engaged with the support point on the connecting lever. The side of the connecting lever facing the transmission body at the support point is the first force arm, and the side of the connecting lever facing the first magnetic body at the support point is the second force arm, wherein the second force arm is greater than the first force arm;

[0013] - A receiving body is provided in the structural member. A diaphragm is provided at one end of the receiving body. A first receiving chamber and a second receiving chamber are sequentially arranged inside the receiving body along the direction from one end to the other end. A piston member is provided in the second receiving chamber and the piston member divides the second receiving chamber into a first receiving space and a second receiving space. The second receiving space is communicated with the outside through a ventilation hole provided at the other end of the receiving body;

[0014] One end of the piston member is connected to the inner wall of the receiving body through an elastic body provided in the second receiving space, and the other end of the piston member is connected to the first magnetic body, wherein the first magnetic body is connected to the sensor installed in the first receiving chamber at a gap;

[0015] The other end of the transmission body is connected to the diaphragm. The first receiving chamber and the first receiving space are filled with fluid. When the transmission body moves towards the diaphragm, the diaphragm pushes the fluid to move towards the first receiving space, and then the piston member drives the first magnetic body to move away from the sensor.

[0016] Preferably, the cross-sectional area of the first receiving chamber is larger than the cross-sectional area of the second receiving chamber.

[0017] Preferably, the support member is made of piezoelectric material and / or magnetostrictive material.

[0018] Preferably, the other end of the piston member is connected to the first magnetic body through a connecting rod.

[0019] Preferably, the diaphragm is a metal or non-metal diaphragm.

[0020] Preferably, the first magnetic body is a permanent magnet or an electromagnet.

[0021] Preferably, the sensor includes a sensor housing, a magnetostrictive body, and a piezoelectric body;

[0022] The magnetostrictive body and the piezoelectric body are sequentially arranged in the sensor housing.

[0023] Preferably, a second magnetic body is arranged circumferentially around the magnetostrictive body.

[0024] A method for measuring the deformation of a loading structural member provided by the present invention includes the following steps:

[0025] S1: A load is installed on the structural member to cause deformation or strain of the structural member itself;

[0026] S2: The deformation or strain causes a displacement of a first magnetic field body installed on the transmission body;

[0027] S3: Due to the displacement, a sensor arranged at an interval from the first magnetic field body generates an electrical signal or a magnetic signal corresponding to the deformation or strain.

[0028] Compared with the prior art, the present invention has the following beneficial effects:

[0029] 1. The present invention can realize the detection of the deformation or strain of the structural member caused by loading during the installation process, and the deformation of the structure of interest caused by the load is corresponded in real time through the sensing electrical signal, and the strain process is monitored in real time, so as to provide a numerical quantification basis for ideal assembly or stress distribution, and further guide the loading and assembly processes to control the assembly process to achieve the optimal assembly. It can not only ensure the normal operation of the equipment after installation, but also extend the service life of the equipment in some occasions.

[0030] 2. The present invention amplifies the electrical signal generated by the deformation of the structural member through various implementation manners, greatly improving the detection sensitivity and detection accuracy of the equipment, and can be reasonably selected according to different application scenarios in practical applications.

[0031] 3. Through the structural arrangement in Embodiment 4 of the present invention, the transmission body does not require special materials, the liquid filled in the accommodating body will amplify the displacement, improving the detection sensitivity. At the same time, under the combined action of the spring and the negative pressure of the fluid transmission in the first accommodating chamber, the piston member can drive the first magnetic field body to reset in real time, greatly improving the detection accuracy. BRIEF DESCRIPTION OF THE DRAWINGS

[0032] By reading the detailed description of the non-restrictive embodiments with reference to the following drawings, other features, objects and advantages of the present invention will become more obvious:

[0033] Figure 1 It is a schematic structural diagram of Embodiment 2 of the present invention;

[0034] Figure 2 It is a schematic structural diagram of Embodiment 3 of the present invention;

[0035] Figure 3 It is a schematic structural diagram of Embodiment 4 of the present invention.

[0036] As shown in the figure:

[0037] Driving body 1, second accommodation chamber 11

[0038] First magnetic field body 2, piston member 12

[0039] Sensor 3, ventilation hole 13

[0040] Load 4, elastic body 14

[0041] Structural member 5, magnetostrictive body 15

[0042] Connecting lever 6, piezoelectric body 16

[0043] Support member 7, second magnetic field body 17

[0044] Container body 8, connecting rod 18

[0045] Diaphragm 9, first accommodation space 19

[0046] First accommodation chamber 10, second accommodation space 20 Specific implementation manner

[0047] The present invention will be described in detail below in conjunction with specific embodiments. The following embodiments will help those skilled in the art to further understand the present invention, but do not limit the present invention in any form. It should be noted that for those of ordinary skill in the art, without departing from the concept of the present invention, several changes and improvements can still be made. These all belong to the protection scope of the present invention.

[0048] Example 1:

[0049] The present invention provides a device for measuring the deformation of a loading structural member, including a driving body 1, a first magnetic field body 2 and a sensor 3. The driving body 1 is connected to a load 4, and the load 4 is installed on a structural member 5. The deformation or strain of the structural member 5 caused by the load 4 can drive the first magnetic field body 2 to move. The sensor 3 is used to detect the displacement generated by the movement of the first magnetic field body 2. When a force generated by the load 4 due to its own weight, its own movement, or the combined action of its own weight and its own movement is applied to the structural member 5, the structural member 5 generates deformation or minute deformation, so that the other end of the driving body 1 can drive the first magnetic field body 2 to move. During the movement of the first magnetic field body 2, the displacement between the first magnetic field body 2 and the sensor 3 changes, and the magnetic field intensity around the sensor 3 changes, so that the displacement generated by the movement of the first magnetic field body 2 can be detected.

[0050] Further, the first magnetic field body 2 is preferably a permanent magnet, which generates a magnetic field around it. The sensor 3 includes a sensor housing, a magnetostrictive body 15, and a piezoelectric body 16. The magnetostrictive body 15 and the piezoelectric body 16 are arranged in the sensor housing in sequence. The magnetostrictive body 15 is made of magnetostrictive material, and the piezoelectric body 16 is made of piezoelectric material. When the first magnetic field body 2 moves closer to or away from the sensor 3, the magnetostrictive body 15 undergoes elongation or shortening deformation due to the magnetic field change. At this time, the piezoelectric body 16 connected to the magnetostrictive body 15 is squeezed or released, thereby generating a changing electrical signal. The changing electrical signal has a corresponding relationship with the deformation of the structural member 5. By detecting the changing electrical signal, the deformation or micro-deformation generated by the structural member 5 can be accurately measured. In a variant, the first magnetic field body 2 is an electromagnet, such as an electromagnetic coil.

[0051] In actual use, to make the detection more sensitive, a second magnetic field body 17 is preferably added circumferentially to the magnetostrictive body 15. The second magnetic field body 17 is preferably an electromagnetic coil. In a variant, a combination of an electromagnetic coil and a permanent magnet is used, which can effectively increase the magnetic field effect, increase the deformation amount of the magnetostrictive body 15, and improve the detection sensitivity.

[0052] It should be noted that when the sensor 3 in the present invention is installed on the structural member 5, it is preferably installed at the bottom of the structural member 5 and at the same height as the bottom of the structural member 5 to avoid the displacement of the sensor 3 caused by the deformation of the structural member 5 itself, thereby affecting the accuracy of the detection structure of the present invention. In a variant, the sensor 3 is not connected to the structural member 5, and the structural member 5 is fixed by other components.

[0053] The present invention also provides a method for measuring the deformation of a loading structural member, including the following steps:

[0054] S1: After adding a load 4 to the structural member 5, the structural member 5 itself undergoes deformation or strain;

[0055] S2: The deformation or strain causes the first magnetic field body 2 installed on the transmission body 1 to generate displacement;

[0056] S3: Through the displacement, the sensor 3 arranged at an interval from the first magnetic field body 2 generates an electrical signal or a magnetic signal that changes corresponding to the deformation or strain.

[0057] In the present invention, the detection of deformation or strain can not only measure the change of the electrical signal through the piezoelectric material structure provided, but also obtain the detection of the strain or deformation amount by detecting the change of the magnetic signal through the Hall element provided.

[0058] It should be noted that the deformation of the structural member 5 in the present invention can be caused only by the weight of the load 4 itself, or by the combined action of the self-weight and self-movement of the load 4. At the same time, the present invention is not only applicable to the scenario where the structural member 5 deforms due to heavy loads, such as when the weight of the load 4 is in the ton level, but also can detect the deformation of the structural member 5 with a small weight by adopting measures to amplify the minute deformation. The amplification measures include using a lever, etc. The so-called small weight, for example, the weight of the load 4 is in a scenario of less than 1 ton. Thus, it can be seen that the present invention has a wide range of applications and can be applied to more application scenarios.

[0059] Example 2:

[0060] This embodiment is a preferred example of Embodiment 1.

[0061] In this embodiment, the first magnetic field body 2 is installed at the end of the transmission body 1 and is arranged at a gap with the sensor 3. As Figure 1 shown, when different loading forces are generated on the structural member 5 after the load 4 is added to the structural member 5, it can cause different deformations of the structural member 5, and then change the distance between the first magnetic field body 2 and the magnetostrictive body 15 on the sensor 3. Furthermore, it changes the magnetic field strength around the magnetostrictive body 15, and the length of the magnetostrictive body 15 itself changes. Furthermore, it changes the degree of extrusion of the piezoelectric body 16, causing the piezoelectric body 16 to generate a changing electrical signal. By detecting the changing electrical signal, the detection of the deformation of the structural member 5 is realized. The structure of this embodiment is simple.

[0062] Example 3:

[0063] This embodiment is another preferred example of Embodiment 1.

[0064] In this embodiment, as Figure 2As shown in the figure, it includes a connecting lever 6 and a support member 7. One end of the connecting lever 6 is movably fitted with the other end of the transmission body 1. The other end of the connecting lever 6 is provided with the first magnetic body 2. The first magnetic body 2 is arranged at a gap with the sensor 3. The support member 7 is movably fitted with the support point on the connecting lever 6. The side of the connecting lever 6 towards the transmission body 1 at the support point is the first force arm, and the side of the connecting lever 6 towards the first magnetic body 2 at the support point is the second force arm. Among them, the second force arm is greater than the first force arm. Therefore, when the transmission body 1 moves upward or downward, the connecting lever 6 forms a lever with the support point as the fulcrum. Since the second force arm is greater than the first force arm, when the transmission body 1 generates a small displacement upward or downward, the first magnetic body 2 generates a relatively large displacement upward or downward. Thus, the change range of the magnetic field intensity around the sensor 3 can be increased, and the change range of the degree of extrusion of the piezoelectric body 16 can be increased, greatly increasing the detection sensitivity and being conducive to the accurate output of the detection result.

[0065] Furthermore, the support member 7 is preferably made of piezoelectric material. The support member 7 will also generate a corresponding changing force during the rotation of the connecting lever 6 and can also output a corresponding changing electrical signal, realizing the detection of the deformation of the structural member 5 or forming a comparison and verification of the detection result of the piezoelectric body 16. In a variation, the support member 7 is made of piezoelectric material and magnetostrictive material. In another variation, the support member 7 is made of magnetostrictive material.

[0066] Example 4:

[0067] This embodiment is another preferred example of Embodiment 1.

[0068] In this embodiment, as Figure 3 shown, a receiving body 8 is provided in the structural member 5. One end of the receiving body 8 is provided with a diaphragm 9. The diaphragm 9 is a metal diaphragm or a non-metal diaphragm, such as a plastic diaphragm, or a nylon diaphragm for example. Inside the receiving body 8, a first receiving chamber 10 and a second receiving chamber 11 are sequentially arranged along the direction from one end to the other end. The cross-sectional area of the first receiving chamber 10 is larger than that of the second receiving chamber 11. A piston member 12 is provided in the second receiving chamber 11, and the piston member 12 divides the second receiving chamber 11 into a first receiving space 19 and a second receiving space 20. The second receiving space 20 is communicated with the outside through a vent hole 13 provided at the other end of the receiving body 8. By providing the vent hole 13 to communicate with the outside, the piston member 12 can reciprocate without affecting the detection accuracy due to air resistance.

[0069] One end of the piston member 12 is connected to the inner wall of the housing 8 through an elastomer 14 disposed in the second accommodation space 20. The elastomer 14 preferably uses a spring. The other end of the piston member 12 is connected to the first magnetic body 2, wherein the first magnetic body 2 is in clearance connection with a sensor 3 installed in the first accommodation chamber 10;

[0070] The other end of the transmission body 1 is connected to the diaphragm 9. The first accommodation chamber 10 and the first accommodation space 19 are filled with fluid. When the transmission body 1 moves towards the diaphragm 9 due to the deformation of the structural member 5, the diaphragm 9 deforms inwards and then pushes the fluid towards the first accommodation space 19, thereby causing the piston member 12 to drive the first magnetic body 2 to move away from the sensor 3. Since the cross-sectional area of the first accommodation chamber 10 is larger than the cross-sectional area of the second accommodation chamber 11, and both the first accommodation chamber 10 and the second accommodation chamber 11 preferably adopt a cylindrical structure, when the fluid in the first accommodation chamber 10 is pressed into the second accommodation chamber 11 when the diaphragm 9 undergoes a small deformation, it will drive the piston member 12 to drive the first magnetic body 2 to generate a relatively large displacement. As Figure 3 shown, S1 in the figure is the inward concave displacement of the diaphragm 9 after being stressed, and S2 is the downward displacement generated by the first magnetic body 2. S2 > S1, and the ratio of the displacements can be achieved by adjusting the ratio of the cross-sectional area of the first accommodation chamber 10 to the cross-sectional area of the second accommodation chamber 11. Furthermore, the change range of the magnetic field intensity around the sensor 3 is increased, so that the change range of the degree of extrusion of the piezoelectric body 16 is increased, greatly increasing the detection sensitivity and being beneficial to the accurate output of the detection result.

[0071] In this embodiment, in order to make the distance between the first magnetic body 2 and the sensor 3 more suitable for the detection needs, the other end of the piston member 12 is connected to the first magnetic body 2 through a connecting rod 18, and the first magnetic body 2 can be installed at a certain position on the connecting rod 18 according to the actual detection requirements to meet the requirements of the installation scenario.

[0072] In the description of the present application, it should be understood that the orientation or positional relationship indicated by the terms "upper", "lower", "front", "rear", "left", "right", "vertical", "horizontal", "top", "bottom", "inner", "outer", etc. is based on the orientation or positional relationship shown in the drawings, and is only for the convenience of describing the present application and simplifying the description, rather than indicating or implying that the device or element referred to must have a specific orientation, be constructed and operated in a specific orientation, and therefore should not be construed as a limitation of the present application.

[0073] The specific embodiments of the present invention have been described above. It should be understood that the present invention is not limited to the above specific embodiments, and those skilled in the art can make various changes or modifications within the scope of the claims, which does not affect the essence of the present invention. Without conflict, the embodiments of the present application and the features in the embodiments can be combined with each other arbitrarily.

Claims

1. A deformation measurement device for a loading structural member, characterized in that Comprising: A transmission body (1) connecting a load (4), and the load (4) is installed on a structural member (5); A first magnetic field body (2), wherein the deformation or strain generated by the structural member (5) can cause the first magnetic field body (2) to move; A sensor (3) for detecting the displacement generated by the movement of the first magnetic field body (2); The first magnetic field body (2) adopts any one of the following connection structures: - The first magnetic field body (2) is installed at the end of the transmission body (1) and is arranged at a gap with the sensor (3); - Further comprising a connecting lever (6) and a support member (7), one end of the connecting lever (6) is movably matched with the other end of the transmission body (1), the other end of the connecting lever (6) installs the first magnetic field body (2), the first magnetic field body (2) is arranged at a gap with the sensor (3), the support member (7) is movably matched with a support point on the connecting lever (6), the side of the connecting lever (6) facing the transmission body (1) at the support point is the first force arm, and the side of the connecting lever (6) facing the first magnetic field body (2) at the support point is the second force arm, wherein the second force arm is greater than the first force arm; - A receiving body (8) is arranged in the structural member (5), a diaphragm (9) is arranged at one end of the receiving body (8), a first receiving chamber (10) and a second receiving chamber (11) are sequentially arranged inside the receiving body (8) along the direction from one end to the other end, a piston member (12) is arranged in the second receiving chamber (11) and the piston member (12) divides the second receiving chamber (11) into a first receiving space (19) and a second receiving space (20), and the second receiving space (20) is communicated with the outside through a vent hole (13) arranged at the other end of the receiving body (8); One end of the piston member (12) is connected to the inner wall of the receiving body (8) through an elastic body (14) arranged in the second receiving space (20), and the other end of the piston member (12) is connected to the first magnetic field body (2), wherein the first magnetic field body (2) is connected to the sensor (3) arranged in the first receiving chamber (10) at a gap; The other end of the transmission body (1) is connected to the diaphragm (9), and the first receiving chamber (10) and the first receiving space (19) are filled with a fluid. When the transmission body (1) moves towards the diaphragm (9), the diaphragm (9) pushes the fluid to move towards the first receiving space (19), thereby causing the piston member (12) to drive the first magnetic field body (2) to move away from the sensor (3); The cross-sectional area of the first receiving chamber (10) is larger than the cross-sectional area of the second receiving chamber (11).

2. The deformation measurement device for the loading structural member according to claim 1, wherein, The support member (7) is made of a piezoelectric material and / or a magnetostrictive material.

3. The deformation measurement device for the loading structural member according to claim 1, wherein, The other end of the piston member (12) is connected to the first magnetic field body (2) through a connecting rod (18).

4. The deformation measurement device for the loading structural member according to claim 1, wherein The diaphragm (9) is made of a metal or non-metal diaphragm.

5. The deformation measurement device for the loading structural member according to claim 1, wherein The first magnetic field body (2) is a permanent magnet or an electromagnet.

6. The deformation measurement device for a loading structural member according to claim 1, characterized in that, The sensor (3) includes a sensor housing, a magnetostrictive body (15) and a piezoelectric body (16); The magnetostrictive body (15) and the piezoelectric body (16) are sequentially arranged in the sensor housing.

7. The deformation measurement device for the loading structural member according to claim 6, wherein A second magnetic field body (17) is arranged circumferentially around the magnetostrictive body (15).

8. A method for measuring the deformation of a loading structural member, characterized in that, The deformation measuring device for a loading structural member according to any one of claims 1 to 7 includes the following steps: S1: A load (4) is installed on the structural member (5) to cause deformation or strain in the structural member (5) itself; S2: The deformation or strain causes a displacement of the first magnetic field body (2) installed on the transmission body (1); S3: Due to the displacement, the sensor (3) arranged at an interval from the first magnetic field body (2) generates an electrical signal or a magnetic signal that changes corresponding to the deformation or strain.

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