A surveying tool for construction work

Abstract

The utility model relates to a kind of surveying tools for construction engineering, including ruler, sliding block, laser ranging module, automatic wire winder and controller;Ruler is opened with sliding cavity along length direction, and the side wall of sliding cavity close to the detection surface of ruler is opened with the measurement slit extending along the length direction of ruler;Sliding block is vertically slidably arranged in sliding cavity, and the upper of sliding block is provided with laser ranging module, laser ranging module is perpendicular to emit laser beam towards detection surface, and laser beam passes through measurement slit to measure the distance between detection surface and wall surface;Automatic wire winder is arranged at one end of ruler, and automatic wire winder is communicated with sliding cavity;Cable is wound on automatic wire winder, one end of cable is electrically connected with laser ranging module, and the other end is electrically connected with controller by passing through electric slip ring and coming out sliding cavity.It avoids the use of plug gauge, improves measurement efficiency, and greatly improves the number of measurable discrete points.

Description

Technical Field

[0001] The utility model relates to the technical field of wall surface detection, in particular to a measuring tool for construction engineering. Background Art

[0002] In the quality acceptance of building decoration and fit-out projects, wall flatness is an important indicator reflecting construction quality. Existing on-site detection mainly adopts a combined mode of a straightedge (ruler), laser projection and a feeler gauge: firstly, a laser line projector is used to project a horizontal or vertical reference line on the wall surface to be measured, so that an operator can position the straightedge along the line and maintain its posture; then the detection surface of the straightedge is closely attached to the wall, and the feeler gauge is inserted into the gap between the straightedge surface and the wall at both ends of the straightedge or a number of selected positions, and the thickness of the feeler gauge is read and recorded as the flatness error at that position. Finally, based on the recorded data of a number of points, it is compared with the acceptance limit to determine whether it is qualified.

[0003] Although the above method is simple and intuitive, in engineering practice, the feeler gauge needs to be repeatedly inserted / pulled out, read and recorded at multiple points. On one hand, the operation is cumbersome; on the other hand, the feeler gauge can only obtain data at limited discrete points, which is difficult to meet the requirement of continuous measurement of the flatness of the wall along a certain straight direction. If local micro-concavities / micro-protrusions fall between sampling points, they are easily missed, resulting in measurement errors.

[0004] Based on this, it is necessary to study a measuring tool for construction engineering. Contents of the Utility Model

[0005] In view of this, the objective of the utility model is to provide a measuring tool for construction engineering, which can effectively solve the problems of low measurement efficiency and inability to obtain continuous flatness existing in existing straightedges.

[0006] To achieve the above objective, the technical scheme adopted by the utility model is: A measuring tool for construction engineering comprises a straightedge, a sliding block, a laser ranging module, an automatic winder and a controller; The straightedge is provided with a sliding cavity along the length direction, and a side wall of the sliding cavity close to the detection surface of the straightedge is provided with a measuring slit extending along the length direction of the straightedge; The sliding block is vertically slidably disposed in the sliding cavity, the laser ranging module is disposed on the sliding block, the laser ranging module emits a laser beam perpendicularly toward the detection surface, and the laser beam passes through the measuring slit to measure the distance between the detection surface and the wall surface; The automatic winder is disposed at one end of the straightedge, and the automatic winder is communicated with the sliding cavity; a cable is wound on the automatic winder, one end of the cable is electrically connected with the laser ranging module, and the other end passes out of the sliding cavity through an electric slip ring and is electrically connected with the controller.

[0007] Furthermore, a rope-passing hole is provided at the end of the sliding cavity away from the automatic winding device, and a pull rope is fixedly connected to the lower end of the slider. The pull rope passes downward through the rope-passing hole and is fixedly connected to a pull ring.

[0008] Furthermore, it also includes a roller encoder; the roller encoder is fixedly mounted on the slider and connected to the controller via a cable; The rotor of the roller encoder is fixedly connected to the roller coaxially via a rotating shaft, and the roller surface rolls against the inner wall of the sliding cavity.

[0009] Furthermore, a rack extending continuously along its length is fixedly connected to the inner wall of the sliding cavity away from the detection surface, and the roller is a gear that meshes with the rack.

[0010] Furthermore, the sliding cavity is fixed with slide rails extending along the length direction on the two side walls adjacent to the detection surface; the slider is provided with a slide groove that is adapted to slide rails, and is slidably disposed in the sliding cavity through the slide grooves and slide rails.

[0011] Furthermore, an abutment plate is detachably connected to the detection surface, and the laser ranging module detects the distance between the side of the abutment plate against the wall and the wall.

[0012] Furthermore, a transparent plate extending along the length of the straightedge and allowing the laser beam to penetrate is fixed to the side of the measuring slit away from the detection surface of the straightedge.

[0013] The beneficial effects of the above technical solution are: This invention utilizes a sliding cavity adjacent to the detection surface and a measuring slit arranged along the length of a straightedge. A laser ranging module is mounted on a slider within the sliding cavity, and its beam is emitted perpendicularly to the detection surface through the slit to measure the distance to the wall surface in real time, thereby obtaining the flatness of a single point. This replaces the use of a plug gauge, improves measurement efficiency, and significantly increases the number of measurable discrete points. Furthermore, the slider can be moved along the length of the straightedge within the sliding cavity for continuous measurement along the straightedge's length. Simultaneously, the controller continuously measures and stores the ranging signal during the slider's movement, allowing the measurement of the wall's flatness changes along a single straight line. This effectively solves the problems of low measurement efficiency and inability to obtain continuous flatness information with existing straightedges, improving measurement efficiency and accuracy, and providing a more intuitive reflection of the entire flatness change of the wall surface. Attached Figure Description

[0014] Figure 1 This is a front sectional view of the present invention; Figure 2 for Figure 1 A magnified view of a section at point A in the middle; Figure 3 This is a top sectional view of the present invention.

[0015] Reference numerals: 1. Straightedge; 2. Slider; 3. Laser rangefinder module; 4. Automatic cable reel; 5. Controller; 6. Cable; 7. Electric slip ring; 8. Pull rope; 9. Pull ring; 10. Roller encoder; 11. Shaft; 12. Roller; 13. Rack; 14. Abutment plate; 15. Transparent plate; 101. Sliding cavity; 102. Measuring slit; 103. Rope hole; 104. Slide rail; 201. Slide groove. Detailed Implementation

[0016] The present invention will be further described in detail below with reference to the accompanying drawings and specific embodiments: This embodiment aims to provide a measuring tool for building engineering, which is mainly used for detecting the flatness of walls, addressing the problems of low measurement efficiency and inability to obtain continuous flatness data with existing straightedges.

[0017] A surveying tool for construction engineering, such as Figure 1-3 It includes a ruler 1, a slider 2, a laser rangefinder module 3, an automatic cable reel 4, and a controller 5.

[0018] The ruler 1 is a rectangular ruler connected front and back. The inside of the ruler 1 has a sliding cavity 101 along the length direction. The side wall of the sliding cavity 101 near the detection surface of the ruler 1 has a measuring slit 102 extending along the length direction of the ruler 1. The detection surface is the surface of the ruler 1 that is in contact with the wall.

[0019] The sliding cavity 101 is provided with slide rails 104 extending along the length direction on both sides of the inner sidewalls of the front and rear sides adjacent to the detection surface; the slider 2 is provided with a slide groove 201 that is adapted to slide rail 104, and is slidably disposed in the sliding cavity 101 through the slide groove 201 and the slide rail 104.

[0020] The slider 2 is vertically slidably disposed in the sliding cavity 101. A laser ranging module 3 is disposed on the top of the slider 2. The laser ranging module 3 emits a laser beam vertically toward the detection surface. The laser beam passes through the measuring slit 102 to measure the distance between the detection surface and the wall.

[0021] Furthermore, considering that the detection surface is prone to wear when it is in contact with the wall, an abutment plate 14 is detachably connected to the detection surface, so that the side of the abutment plate 14 closest to the wall becomes the new detection surface. The laser ranging module 3 detects the distance between the side of the abutment plate 14 closest to the wall and the wall, so that calibration and repair can be performed by adjusting or replacing the abutment plate 14, so as to facilitate maintenance.

[0022] like Figure 2An automatic cable reel 4 is located at the top of the ruler 1. The automatic cable reel 4 is a spring-loaded cable reel that winds up the cable 6 in its natural state and holds the slider 2 at the top of the sliding cavity 101. The automatic cable reel 4 is connected to the sliding cavity 101. The cable 6 is wound on the automatic cable reel 4. One end of the cable 6 is electrically connected to the laser ranging module 3, and the other end passes through the sliding cavity 101 through the electric slip ring 7 and is electrically connected to the controller 5. This allows the laser ranging module 3 to be powered on and connected to the controller 5 for control. This facilitates the cable routing of the laser ranging module 3 and also allows the slider 2 to be held and reset to the top of the sliding cavity 101.

[0023] An electric slip ring 7 is an electrical component used in rotating equipment to achieve continuous transmission of power and signals; it is also known as a collector ring, bus ring, or rotary joint. Its core structure consists of a rotor (rotating end) and a stator (fixed end), forming a conductive path through elastic contact or rolling overlap to solve the problem of wire entanglement during rotation. The electric slip ring 7 is typically used in conjunction with a cable reel. Its rotor is fixedly connected to the cable 6 on the reel, and its stator is fixed to the reel and has a fixed connection to an output terminal for electrical connection with the controller 5, eliminating the rotation problem caused by the cable reel on the output terminal. It mainly utilizes existing technology, which will not be elaborated upon here.

[0024] The end of the sliding cavity 101 away from the automatic winder 4, i.e. the lower end, has a rope hole 103. The lower end of the slider 2 is fixedly connected to a pull rope 8. The pull rope 8 passes downward through the rope hole 103 and is fixedly connected to a pull ring 9, so that the slider 2 can be moved downward by pulling the pull ring 9 downward.

[0025] The controller 5 is mounted on the side wall of the ruler 1 away from the detection surface. The controller 5 includes at least a control board, basic buttons, and a display screen. The control board uses a Steam32 embedded controller 5 for signal input / output and data processing. If necessary, an IoT system can be used to communicate the controller 5 with the user's app to facilitate the user obtaining the inspection report. The specific integration and control logic of the controller 5 utilize existing technology and will not be elaborated upon here.

[0026] Furthermore, this embodiment also includes a roller encoder 10; the roller encoder 10 is a displacement measuring device based on the conversion of mechanical rotation into electrical signals. Its core components include a roller, photoelectric emitting and receiving elements, and a signal processing circuit. When the roller rotates with the object being measured, its light-transmitting or light-blocking parts periodically block light, thereby generating changes in luminous flux between the photoelectric elements. This change is converted into an electrical signal, which, after being amplified and shaped by the signal processing circuit, outputs a pulse signal proportional to the displacement of the object being measured. By counting these pulse signals, accurate displacement measurement can be achieved, and it is currently widely used in high-end manufacturing industries such as CNC machine tools, robotic arms, and precision measuring instruments. Its control principle and specific structure utilize existing technology and will not be elaborated upon here.

[0027] In this embodiment, the roller encoder 10 is fixedly mounted on the slider 2 and connected to the controller 5 via the cable 6. The rotor of the roller encoder 10 is coaxially fixedly connected to the roller 12 via the rotating shaft 11. The wheel surface of the roller 12 rolls against the inner wall of the sliding cavity 101, so that the controller 5 can obtain the specific position of the slider 2 in the sliding groove through the roller encoder 10.

[0028] Before use, this embodiment requires calibration and zeroing. This can be done by placing the contact surface of the ruler 1 against a standard plane for measurement. At this time, the data of the laser ranging module 3 is zeroed, so that the data fed back by the laser ranging module 3 during the formal measurement is the distance between the side of the contact plate 14 closest to the wall and the wall, that is, the flatness data.

[0029] In use, the straightedge 1 is attached to a specific straight line on the wall in conjunction with the laser projection. The pull ring 9 is gradually pulled, causing the slider 2 to slide from one end of the sliding cavity 101 (the end near the automatic reel 4) to the other end, thereby making continuous measurements in the direction of the straight line. The laser ranging module 3 will continuously feed back the calculated distance between the side of the abutment plate 14 near the wall and the wall, i.e., the flatness data, to the controller 5. At the same time, the controller 5 obtains the current position of the slider 2 in real time through the roller encoder 10, and combined with the flatness data of the current position, it can draw a position-flatness change curve to intuitively reflect the flatness change of the wall along a specific straight line and the flatness data at any position.

[0030] Furthermore, a rack 13 extending continuously along its length is fixedly connected to the inner wall of the sliding cavity 101 away from the detection surface, and the roller 12 is a gear meshing with the rack 13, thereby preventing the roller 12 from slipping and causing position calculation deviation.

[0031] Furthermore, considering that the measuring slit 102 and the sliding cavity 101 will divide the ruler 1, the central area of ​​the detection surface is prone to structural instability and local deformation problems. To address this, a transparent plate 15 extending along the length of the ruler 1 and allowing the laser beam to penetrate is fixed to the side of the measuring slit 102 away from the detection surface of the ruler 1, in order to improve the stability of the structure.

Claims

1. A measuring tool for construction engineering, characterized in that: Includes a ruler, slider, laser rangefinder module, automatic cable reel, and controller; The ruler has a sliding cavity along its length, and a measuring slit extending along the length of the ruler is formed on one side wall of the sliding cavity near the detection surface of the ruler. The slider is vertically slidably disposed in the sliding cavity. A laser ranging module is disposed on the slider. The laser ranging module emits a laser beam perpendicularly toward the detection surface. The laser beam passes through the measuring slit to measure the distance between the detection surface and the wall. The automatic cable reel is located at one end of the straightedge and is connected to the sliding cavity. A cable is wound on the automatic cable reel, one end of which is electrically connected to the laser ranging module, and the other end passes through the sliding cavity via an electric slip ring and is electrically connected to the controller.

2. The measuring tool for construction engineering according to claim 1, characterized in that: The sliding cavity has a rope hole at the end away from the automatic winding device. A pull rope is fixedly connected to the lower end of the slider. The pull rope passes downward through the rope hole and is fixedly connected to a pull ring.

3. A surveying tool for construction engineering according to claim 1 or 2, characterized in that: It also includes a roller encoder; the roller encoder is fixedly mounted on the slider and connected to the controller via a cable. The rotor of the roller encoder is fixedly connected to the roller coaxially via a rotating shaft, and the roller surface rolls against the inner wall of the sliding cavity.

4. A surveying tool for construction engineering according to claim 3, characterized in that: A rack extending continuously along the length of the sliding cavity is fixedly connected to the inner wall away from the detection surface, and the roller is a gear that meshes with the rack.

5. A surveying tool for construction engineering according to claim 1 or 2, characterized in that: The sliding cavity is fixed with slide rails extending along its length on the two side walls adjacent to the detection surface; the slider is provided with a slide groove that is adapted to slide along the slide rail, and is slidably disposed in the sliding cavity through the slide groove and the slide rail.

6. A surveying tool for construction engineering according to claim 1 or 2, characterized in that: A contact plate is detachably connected to the detection surface, and the laser ranging module detects the distance between the side of the contact plate against the wall and the wall.

7. A surveying tool for construction engineering according to claim 1 or 2, characterized in that: A transparent plate extending along the length of the straightedge and allowing the laser beam to penetrate is fixed to the side of the measuring slit away from the straightedge detection surface.

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