A hand-held device for remote measurement of the dimensions of a building structure grid rod

Abstract

The utility model discloses a kind of hand-held devices for building structure net rack bar piece size remote measurement, it is related to building structure net rack bar piece size measurement technical field, including the measuring device body for measuring to be detected bar piece, the measuring device body includes hand-held part, the hand-held part one end is equipped with working part, three laser ranging modules capable of emitting laser beam are equipped in the working part, glass protective cover is equipped in the laser ranging module outside, computing module is equipped in the hand-held part inside, the utility model is measured by three parallelly arranged laser ranging modules and realizes non-contact ranging, and through computing module, utilize the geometric algorithm program of three-point circle determination, the diameter of to be detected bar piece is converted by the distance data measured by laser ranging module, reaches the effect that bar piece diameter can be quickly measured without climbing, without erecting scaffold or moving aerial work equipment, completely eliminates the high-altitude falling risk caused by traditional vernier caliper detection.

Description

Technical Field

[0001] This utility model relates to the field of building structure space frame member size measurement technology, specifically a handheld device for remote measurement of building structure space frame member size. Background Technology

[0002] In the field of structural health monitoring and assessment of existing buildings, spatial grid structures are widely used in large-span buildings such as stadiums, airport terminals, and industrial plants due to their lightweight, high strength, and large span capacity. As key structural load-bearing components, the actual cross-sectional dimensions (especially the diameter) of the members are essential basic parameters for assessing their load-bearing capacity, fatigue life, and structural safety level. However, due to functional limitations of the building, the members of this type of structure are often arranged at heights of tens of meters above the ground, and the number of members is large and the nodes are dense.

[0003] When inspecting the diameter of space frame members, since the space frame is located at high altitudes, traditional vernier calipers are used, which requires climbing to measure. Due to the large number of space frame members, the high-altitude work equipment needs to be moved multiple times to complete the diameter inspection of the entire space frame member. This results in low inspection efficiency and high risk of working at heights.

[0004] Based on this, a handheld device for remote measurement of the dimensions of structural space frame members in building structures is now provided, which can eliminate the drawbacks of existing devices. Utility Model Content

[0005] The purpose of this invention is to provide a handheld device for remote measurement of the dimensions of structural space frame members in building structures, in order to solve the problems in the background art.

[0006] To achieve the above objectives, this utility model provides the following technical solution:

[0007] A handheld device for remote measurement of the dimensions of structural space frame members in a building includes a measuring device body for measuring the member to be inspected. The measuring device body includes a handheld part, a working part at one end of the handheld part, and three laser ranging modules capable of emitting laser beams arranged in parallel inside the working part. A glass protective cover is provided on the outside of the laser ranging modules, and a calculation module is provided on the inside of the handheld part.

[0008] Based on the above technical solutions, this utility model also provides the following optional technical solutions:

[0009] In one alternative: the end of the handheld part away from the working part is provided with a battery compartment for installing batteries.

[0010] In one alternative: the battery compartment opening is provided with a compartment cover.

[0011] In one alternative: the compartment cover is provided with anti-slip grooves.

[0012] In one alternative: a display screen is provided on one side of the handheld part, and control buttons are provided above the display screen.

[0013] In one alternative: the laser ranging module, the computing module, and the battery are electrically connected.

[0014] In one alternative: both the handheld part and the working part are made of PC shell, and the outside of the handheld part is provided with TPE anti-slip coating.

[0015] Compared with the prior art, the beneficial effects of this utility model are as follows:

[0016] This invention achieves non-contact distance measurement through three parallel laser ranging modules. The calculation module uses a geometric algorithm based on three points to determine a circle to calculate the diameter of the rod to be inspected from the distance data measured by the laser ranging modules. This achieves the effect of quickly measuring the diameter of the rod without climbing, erecting scaffolding, or moving high-altitude work equipment, completely eliminating the risk of falling from heights caused by traditional vernier caliper inspection. Attached Figure Description

[0017] Figure 1 This is a schematic diagram of the structure of this utility model.

[0018] Figure 2 This is a schematic diagram of the battery compartment in this utility model.

[0019] Figure 3 This is a schematic diagram of the working state of this utility model.

[0020] Figure label annotations: 1. Handheld part; 2. Working part; 3. Laser rangefinder module; 4. Glass protective cover; 5. Control button; 6. Display screen; 7. Calculation module; 8. Battery compartment; 9. Battery; 10. Compartment cover; 11. Anti-slip groove; 12. Laser beam; 13. Rod to be inspected. Detailed Implementation

[0021] To make the objectives, technical solutions, and advantages of this utility model clearer, the present utility model will be further described in detail below with reference to the accompanying drawings and embodiments.

[0022] In one embodiment, such as Figures 1-3As shown, a handheld device for remote measurement of the dimensions of structural space frame members includes a measuring device body for measuring the member 13 to be inspected. The measuring device body includes a handheld part 1, a working part 2 at one end of the handheld part 1, three laser ranging modules 3 capable of emitting laser beams 12 arranged in parallel inside the working part 2, a glass protective cover 4 on the outside of the laser ranging modules 3, a calculation module 7 on the inside of the handheld part 1, a battery compartment 8 for installing batteries 9 at the end of the handheld part 1 away from the working part 2, a compartment cover 10 at the opening of the battery compartment 8, and anti-slip grooves 11 on the compartment cover 10. A display screen 6 is located on one side of the handheld part 1. The display screen 6 has a control button 5 above it. The laser ranging module 3, the calculation module 7 and the battery 9 are electrically connected. Both the handheld part 1 and the working part 2 are made of PC shell. The outside of the handheld part 1 is covered with TPE anti-slip rubber. When in use, the operator holds the handheld part 1 and makes the working part 2 face the rod 13 to be inspected. Then, the operator presses the control button 5 to start the laser ranging module 3. The laser ranging module 3 emits three parallel laser beams 12 towards the rod 13 to be inspected and measures three distance data. Then, the calculation module 7 uses the three distance data to calculate the diameter of the rod 13 to be inspected and displays the corresponding data on the display screen 6.

[0023] The calculation principle of the calculation module 7 is as follows: Three parallel laser beams 12 are emitted towards the rod 13 to be inspected by three laser ranging modules 3. The distance between the laser ranging modules 3 is fixed and known to be L0. The laser ranging modules 3 simultaneously measure three distances, namely L1, L2, and L3. According to geometric principles, three points can determine a unique circle, and the diameter of the rod under test can be obtained through geometric calculation. The laser ranging modules 3 transmit the distance data to the calculation module 7, which uses the distance data to calculate the diameter and displays it on the display screen 6.

[0024] The above calculation process can be achieved by defining a coordinate system to determine the coordinates of the three points to be measured (0, L1), (L0, L2) and (2L0, L3), and then using a calculation module to implement the calculation. L1, L2, L3 and the calculation results are all displayed on the screen, which makes it easy to check whether L1, L2, L3 and the calculation results are abnormal.

[0025] Suppose the three points on the plane are (x1, y1), (x2, y2), and (x3, y3).

[0026] The formula for a circle is: x 2 +y 2 +D x +E y +F=0.

[0027] Substituting (x1,y1), (x2,y2), and (x3,y3) into the formula, we can calculate D, E, and F.

[0028] Substitute D, E, and F into x. 2 +y 2 +D x +E y +F=0.

[0029] And because (xa) 2 +(yb) 2 =r 2 (a, b) are the coordinates of the center of the circle.

[0030] achievable

[0031] The above embodiments disclose a handheld device for remote measurement of the dimensions of structural space frame members. It achieves non-contact distance measurement through three parallel laser ranging modules 3, and calculates the diameter of the member 13 to be inspected by the distance data measured by the laser ranging modules 3 through the calculation module 7 using a geometric algorithm program of three points to determine a circle. This achieves the effect of quickly measuring the diameter of the member without climbing, erecting scaffolding or moving high-altitude work equipment, and completely eliminates the risk of falling from heights caused by traditional vernier caliper inspection.

[0032] The above description is merely a specific embodiment of this application, but the scope of protection of this application is not limited thereto. Any variations or substitutions that can be easily conceived by those skilled in the art within the technical scope disclosed in this application should be included within the scope of protection of this application. Therefore, the scope of protection of this application should be determined by the scope of the claims.

Claims

1. A handheld device for remote measurement of the dimensions of structural space frame members, comprising a measuring device body for measuring the member (13) to be inspected, the measuring device body including a handheld part (1), one end of the handheld part (1) having a working part (2), characterized in that, The working part (2) is provided with three laser ranging modules (3) capable of emitting laser beams (12) in parallel. The laser ranging modules (3) are provided with a glass protective cover (4) on the outside. The handheld part (1) is provided with a calculation module (7) on the inside.

2. The handheld device for remote measurement of the dimensions of space frame members in building structures according to claim 1, characterized in that, The handheld part (1) is provided with a battery compartment (8) for installing the battery (9) at the end away from the working part (2).

3. A handheld device for remote measurement of the dimensions of space frame members in building structures according to claim 2, characterized in that, The battery compartment (8) is provided with a cover (10) at the opening.

4. A handheld device for remote measurement of the dimensions of space frame members in building structures according to claim 3, characterized in that, The cover (10) is provided with anti-slip grooves (11).

5. A handheld device for remote measurement of the dimensions of structural space frame members according to claim 1, characterized in that, The handheld part (1) is provided with a display screen (6) on one side, and a control button (5) is provided above the display screen (6).

6. A handheld device for remote measurement of the dimensions of space frame members in building structures according to claim 1 or 2, characterized in that, The laser ranging module (3), the calculation module (7), and the battery (9) are electrically connected.

7. A handheld device for remote measurement of the dimensions of structural space frame members according to claim 1, characterized in that, Both the handheld part (1) and the working part (2) are made of PC shell, and the outside of the handheld part (1) is covered with TPE anti-slip rubber.

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