Beam deflection change amplification and visualization device

Abstract

The utility model belongs to the field of beam deflection monitoring devices, and particularly discloses a beam deflection change amplification and visualization device. Comprising a laser emitting device and a laser refraction device. The laser emitting device is fixed to a column at one end of the beam, the laser refraction device is installed at the bottom of the middle of the beam, and laser is refracted and amplified through a convex lens. A screw rod and two round rods in the device are arranged in parallel, and a convex lens is vertically fixed at the bottom of the screw rod and can be finely adjusted through a nut. And the light spot observation plate with scales is arranged below the column on the opposite side of the laser emitting device, so that the displacement of the light spot is convenient to observe and measure. In addition, the angle of a laser transmitter in the laser transmitting device can be adjusted so as to meet different measurement requirements. The convex lens is designed to be detachable, so that lenses with different focal lengths can be replaced according to actual requirements; through refraction and amplification of the laser, accurate measurement and visualization of beam deflection change are realized, and the device has the advantages of simple structure, convenient operation, accurate measurement and the like.

Description

TECHNICAL FIELD

[0001] The utility model belongs to the field of beam deflection monitoring device, specifically discloses a beam deflection change amplification and visualization device. BACKGROUND

[0002] The change of beam deflection, as one of the important indicators of structural health monitoring, often indicates the potential safety hazards or performance degradation of the structure. However, due to the extremely small change of beam deflection, it is difficult to accurately measure by daily observation or simple tools, therefore, the monitoring of beam deflection often needs to rely on high-precision professional instruments.

[0003] In the traditional method, periodic measurement by artificial use of total station is a more common way. As a high-precision measurement equipment integrating angle measurement, distance measurement and data processing, total station can accurately measure the deflection change of beam at different positions and different time points. However, the implementation of this method not only needs professional personnel to operate to ensure the accuracy and reliability of measurement, but also needs to be carried out periodically to track the dynamic change of beam deflection. This undoubtedly increases the labor cost and time cost of monitoring work, and may also cause measurement error due to improper human operation or environmental factors.

[0004] In order to overcome these limitations, automatic monitoring equipment emerges as the times require. These devices usually integrate advanced sensor technology, data processing technology and remote communication technology, can monitor the change of beam deflection in real time and automatically, and transmit the monitoring data to the remote monitoring center through wireless or wired way. In the monitoring center, professional personnel can analyze and process the data to find abnormal change of beam deflection in time, and provide scientific basis for the maintenance and management of structure. However, although the automatic monitoring equipment has many advantages, its high procurement cost, complex installation and debugging process and the need for professional personnel to maintain still limit its application in some scenes with limited funds or technical strength.

[0005] Therefore, it is of great significance to develop a monitoring device which is economical and practical, easy to operate and can accurately reflect the change of beam deflection, to improve the efficiency and accuracy of structural health monitoring and reduce the monitoring cost. Such a device not only can meet the urgent needs in engineering practice, but also can promote the further development and innovation of structural health monitoring technology. UTILITY MODEL CONTENT

[0006] In view of the above problems, the utility model discloses a beam deflection change amplification and visualization device, which can amplify the tiny change of beam deflection by dozens of times, and quantitatively convert the deflection change into the position of light spot on the scale plate, so that the change of beam deflection can be observed in real time on site.

[0007] The technical scheme of the utility model is as follows:

[0008] A beam deflection change amplification and visualization device, comprising a laser emitting device and a laser refraction device.

[0009] The laser emitting device is fixed to the middle upper part of the column at one end of the beam, and the laser refraction device is fixed to the bottom of the middle part of the beam.

[0010] The laser refraction device comprises a convex lens, a screw rod, a nut, a mounting support, and two round rods.

[0011] The mounting support is a Z-shaped right angle, and has two flat plates on the upper and lower sides, the upper flat plate is fixed to the bottom surface of the middle part of the beam, the lower flat plate of the mounting support is provided with three round holes, and the screw rod and the two round rods pass through the three round holes correspondingly; by rotating the nut, the convex lens can be lifted or lowered, and at the same time, due to the action of the two round rods, relative rotation between the convex lens and the mounting support can be prevented when the nut is rotated.

[0012] The screw rod is located between the two round rods.

[0013] The nut is sleeved on the screw rod and can rotate with the screw rod.

[0014] The bottom of the screw rod is fixed with the convex lens.

[0015] The nut and the convex lens are located on the upper and lower sides of the lower flat plate of the mounting support respectively.

[0016] Further, the screw rod and the two round rods are parallel in the above-described beam deflection change amplification and visualization device.

[0017] Further, the bottom of the screw rod is fixed with the convex lens vertically in the above-described beam deflection change amplification and visualization device.

[0018] Further, the above-described beam deflection change amplification and visualization device is provided with a light spot observation device below the column on the opposite side of the laser emitting device, and the light spot observation device is a plate for conveniently observing the light spot.

[0019] Further, the above-described beam deflection change amplification and visualization device is provided with a scale on the plate.

[0020] Further, the above-described beam deflection change amplification and visualization device is provided with an adjustable angle laser emitter in the laser emitting device, so that the emission direction of the laser beam can be adjusted as required.

[0021] Further, the above-described beam deflection change amplification and visualization device is provided with an adjustable angle laser emitter in the laser emitting device, so that the emission direction of the laser beam can be adjusted as required.

[0022] This utility model also discloses a method for operating the above-mentioned visualization device, including the following steps:

[0023] (1) The laser refraction device is installed at the bottom of the mid-span beam by expansion screws, and the convex lens is raised to the highest point by rotating the nut.

[0024] (2) Fix the laser emitting device at a suitable position on the top of the column with expansion screws so that the laser can pass horizontally through the middle of the convex lens.

[0025] (3) On-site calibration of the relationship between the beam spot position and the beam deflection. By rotating the nut, the convex lens is lowered. Each rotation of the nut lowers the convex lens by one pitch, and the beam spot height changes accordingly. Mark the distance the convex lens has lowered at the beam spot position. Then repeat the operation until the convex lens is lowered to its lowest point, that is, the laser just passes through the upper edge of the convex lens; (the common screw pitch is 0.5mm or 1mm).

[0026] (4) By rotating the nut, the convex lens is raised back to its initial position, so that the laser just passes through the middle of the convex lens.

[0027] (5) By observing the position of the light spot, the change in beam deflection can be understood in real time on site.

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

[0029] This invention allows for the amplification of minute beam deflection changes by tens of times using inexpensive equipment. The amplification quantitatively converts these changes into the position of a light spot on a scale, enabling real-time observation of beam deflection variations. The beam deflection amplification factor is approximately equal to the ratio of the horizontal distance between the laser refraction device and the column containing the light spot to the focal length of the laser refraction device. (For example, using a convex lens with a focal length of 50mm and a distance of 2.5m between the lens and the column, the amplification factor is approximately 50 times). If a dynamic load causes minute dynamic deflection, the beam deflection change can be directly observed by the up-and-down movement of the light spot. Furthermore, the frequency of beam vibration can be calculated by determining the time it takes for the light spot to travel back and forth. Attached Figure Description

[0030] Fig. 1 A schematic diagram of a device for magnifying and visualizing beam deflection changes (laser passes through the top of a convex lens).

[0031] Fig. 2 A schematic diagram of a device for magnifying and visualizing beam deflection changes (laser passes through the center of a convex lens).

[0032] Fig. 3 Schematic diagram of laser refraction device

[0033] In the figure: 1-laser emitting device, 2-laser refracting device, 3-laser, 4-beam, 5-column, 2-1 convex lens, 2-2 screw rod, 2-3 nut, 2-4 mounting support, 2-5 round rod. DETAILED DESCRIPTION

[0034] Embodiments of the present application will be described in detail below, examples of which are shown in the drawings, wherein the same or similar reference numerals represent the same or similar elements or elements having the same or similar functions throughout. The embodiments described below by referring to the drawings are exemplary and are intended to explain the present application, and cannot be understood as a limitation of the present application.

[0035] In the description of the present application, it should be understood that the orientations or positional relationships indicated by the terms "center", "longitudinal", "transverse", "length", "width", "thickness", "upper", "lower", "front", "rear", "left", "right", "vertical", "horizontal", "top", "bottom", "inner", "clockwise", "counterclockwise" are based on the orientations or positional relationships shown in the drawings, and are only for the convenience of describing the present application and simplifying the description, and therefore cannot be understood as indicating or implying that the devices or elements indicated must have a particular orientation, be constructed and operated in a particular orientation, and therefore cannot be understood as a limitation of the present application.

[0036] In addition, the terms "first" and "second" are only for descriptive purposes, and cannot be understood as indicating or implying relative importance or implicitly indicating the number of the indicated technical features. Therefore, the features defined with "first" and "second" can explicitly or implicitly include one or more of the features. In the description of the present application, unless otherwise specified, the meaning of "a plurality of" is two or more, unless otherwise explicitly limited.

[0037] In the present application, unless otherwise explicitly specified and limited, the terms "mounting", "connection", "connection", "fixing" and the like should be understood in a broad sense, for example, it can be fixedly connected, or it can be detachably connected, or integrally connected; it can be mechanically connected, or it can be electrically connected; it can be directly connected, or it can be indirectly connected through an intermediate medium; it can be the communication inside two elements. For those skilled in the art, the specific meaning of the above terms in the present application can be understood according to the specific circumstances.

[0038] In the utility model, unless another definite provision and limitation, first feature is in second feature "on" or "under" can include that first and second features are in direct contact, also can include that first and second features are not in direct contact but contact through other feature between them.Moreover, first feature is on, above and on of second feature includes that first feature is directly above and obliquely above of second feature, or just indicates that horizontal height of first feature is higher than second feature.First feature is below, under and under of second feature includes that first feature is directly below and obliquely below of second feature, or just indicates that horizontal height of first feature is less than second feature.

[0039] Embodiment 1

[0040] As Figs. 1-3 The utility model provides a beam deflection change amplification and visualization device, including laser emission device 1 and laser refraction device 2;

[0041] Laser emission device 1 is fixed to the middle upper portion of column 5 of one end of beam 4, and laser refraction device 2 is fixed to the bottom of the middle of beam 4;

[0042] Laser refraction device 2 includes convex lens 2-1, screw rod 2-2, nut 2-3, mounting support 2-4, 2 round rods 2-5;

[0043] Mounting support 2-4 is Z-shaped right angle, and two plane plates are arranged on the upper and lower portions of the mounting support 2-4, the upper plane plate is fixed to the bottom surface of the middle of the beam 2, and three round holes are arranged on the lower plane plate of the mounting support 2-4, and the screw rod 2-2 and the two round rods 2-5 are correspondingly arranged through the three round holes;

[0044] Screw rod 2-2 is located between the two round rods 2-5;

[0045] Nut 2-3 is sleeved on the screw rod 2-2 and can be matched with the screw rod 2-2 to rotate;

[0046] The bottom of the screw rod 2-2 is fixed with the convex lens 2-1;

[0047] The nut 2-3 and the convex lens 2-1 are located on the upper and lower sides of the lower plane plate of the mounting support 2-4 respectively.

[0048] The use method of the above device includes the following steps:

[0049] (1) laser refraction device 2 is installed on the bottom of the midspan beam through expansion screws, and the convex lens 2-1 is lifted to the highest position by rotating the nut 2-3.

[0050] (2) laser emission device 1 is fixed on the top of the column at a suitable position through expansion screws, so that the laser 3 can pass through the middle of the convex lens 2-1 horizontally.

[0051] (3) On-site calibration of the relationship between the beam spot position and the beam deflection. By rotating nut 2-3, the convex lens 2-1 is lowered. For each rotation of the nut, the convex lens 2-1 will lower by one pitch, and the beam spot height will change accordingly. Mark the distance that the convex lens 2-1 has lowered at the beam spot position. Then repeat the operation until the convex lens 2-1 is lowered to its lowest point, that is, the laser 3 just passes through the upper edge of the convex lens 2-1. (The common screw pitch is 0.5mm or 1mm).

[0052] (4) By rotating nut 2-3, the convex lens 2-1 is raised back to its initial position, that is, the laser 3 just passes through the middle of the convex lens 2-1.

[0053] (5) By observing the position of the light spot, the change in beam deflection can be understood in real time on site.

[0054] Example 2

[0055] like Figs. 1-3 The device shown is a beam deflection magnification and visualization device, including a laser emitting device 1 and a laser refraction device 2;

[0056] The laser emitting device 1 is fixed to the upper middle part of the column 5 at one end of the beam 4, and the laser refraction device 2 is fixed to the bottom of the middle part of the beam 4.

[0057] The laser refraction device 2 includes a convex lens 2-1, a screw 2-2, a nut 2-3, a mounting bracket 2-4, and two round rods 2-5;

[0058] Mounting support 2-4 is a right-angled Z-shaped support with two flat plates on the top and bottom. The upper flat plate is fixed to the bottom surface of the middle part of the beam 2. The lower flat plate of mounting support 2-4 has three round holes, through which screw 2-2 and two round rods 2-5 pass.

[0059] Screw 2-2 is located between the two round rods 2-5;

[0060] Nut 2-3 is fitted onto screw 2-2 and can rotate with it;

[0061] The convex lens 2-1 is fixed at the bottom of the screw 2-2;

[0062] The nut 2-3 and the convex lens 2-1 are located on the upper and lower sides of the lower plane plate of the mounting support 2-4, respectively.

[0063] Particularly, the screw rod 2-2 is parallel to the two round rods 2-5; further, the convex lens 2-1 is vertically fixed at the bottom of the screw rod 2-2; preferably, a light spot observation device is arranged below the column 5 opposite to the laser emitting device 1, the light spot observation device is a plate for conveniently observing the light spot; further, a scale is arranged on the plate; particularly, an angle-adjustable laser emitter is arranged in the laser emitting device 1, so that the emission direction of the laser beam can be adjusted as required; preferably, the convex lens 2-1 is detachably replaced.

[0064] The method for using the device comprises the following steps:

[0065] (1) The laser refraction device 2 is installed on the bottom of the mid-span beam through expansion screws, and the convex lens 2-1 is lifted to the highest position by rotating the nut 2-3.

[0066] (2) The laser emitting device 1 is fixed at a suitable position on the top of the column through expansion screws, so that the laser 3 can just pass through the middle part of the convex lens 2-1 horizontally.

[0067] (3) The light spot position and the beam deflection corresponding relationship are calibrated on site. The convex lens 2-1 is lowered by rotating the nut 2-3, and the light spot height changes correspondingly, and the distance of the convex lens 2-1 is marked on the light spot position. Then repeat the operation until the convex lens 2-1 is lowered to the lowest position, that is, the laser 3 just passes through the upper edge of the convex lens 2-1. (The common screw pitch of the screw rod is 0.5mm, 1mm).

[0068] (4) The convex lens 2-1 is lifted to the initial position by rotating the nut 2-3, that is, the laser 3 just passes through the middle part of the convex lens 2-1.

[0069] (5) The change of the beam deflection can be understood in real time on site through the light spot position.

[0070] As can be seen from the above embodiment, the beam deflection change amplification and visualization device provided by the utility model realizes intuitive amplification and visualization monitoring of the beam deflection change through the ingenious combination of laser emission and refraction. The device not only has simple structure and convenient installation, but also can realize sensitive capture and accurate quantification of the deflection change by accurately adjusting the position of the convex lens, greatly reducing the monitoring cost and technical threshold. At the same time, the setting of the light spot observation device and the scale makes the monitoring result more intuitive and easy to understand, provides strong support for the health monitoring and safety management of the structure, and effectively improves the monitoring efficiency and accuracy.

[0071] The above merely describes the preferred embodiments of the present utility model, and cannot be used to limit the protection scope of the present utility model, that is, any simple equivalent changes and modifications made according to the claims and contents of the present utility model still belong to the protection scope of the present utility model patent application.

Claims

1. A beam deflection variation amplification and visualization device, characterized by, The laser emitting device (1) and the laser refracting device (2) are included. The laser emitting device (1) is fixed to the middle upper part of the column (5) at one end of the beam (4), and the laser refracting device (2) is fixed to the bottom of the middle part of the beam (4). The laser refracting device (2) includes a convex lens (2-1), a screw rod (2-2), a nut (2-3), a mounting support (2-4), and two round rods (2-5). The mounting support (2-4) is a Z-shaped right angle with two flat plates on the upper and lower sides, and the upper flat plate is fixed to the bottom surface of the middle part of the beam (4). The lower flat plate of the mounting support (2-4) is provided with three round holes, and the screw rod (2-2) and the two round rods (2-5) pass through the three round holes correspondingly. The screw rod (2-2) is located between the two round rods (2-5). The nut (2-3) is sleeved on the screw rod (2-2) and can rotate with it. The bottom of the screw rod (2-2) is fixed with the convex lens (2-1). The nut (2-3) and the convex lens (2-1) are located on the upper and lower sides of the lower flat plate of the mounting support (2-4), respectively.

2. A beam deflection variation amplification and visualization device according to claim 1, wherein, The screw rod (2-2) is parallel to the two round rods (2-5).

3. A beam deflection variation amplification and visualization device as claimed in claim 1, wherein, The bottom of the screw rod (2-2) is fixed with the convex lens (2-1) vertically.

4. A beam deflection variation amplification and visualization device as claimed in claim 1, wherein, A light spot observation device is arranged below the column (5) opposite to the laser emitting device (1), and the light spot observation device is a plate for conveniently observing the light spot.

5. A beam deflection variation amplification and visualization device as claimed in claim 4, wherein, A scale is arranged on the plate.

6. A beam deflection variation amplification and visualization device as claimed in claim 1, wherein, An adjustable angle laser emitter is arranged in the laser emitting device (1), so that the emission direction of the laser beam can be adjusted as needed.

7. A beam deflection variation amplification and visualization device as claimed in claim 1, wherein, The convex lens (2-1) is detachable and replaceable.

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