Ground flatness laser detection device for industrial building construction

Abstract

The device comprises a box body and a measuring assembly arranged in the box body, the measuring assembly comprises a laser emitting unit, a lens unit, a focal length adjusting unit and a height adjusting unit, the height adjusting unit is arranged on the upper side in the box body, and the focal length adjusting unit is arranged at the bottom of the height adjusting unit. The laser emitting unit is arranged at the bottom of the focal length adjusting unit, and the lens unit is arranged at the bottom of the focal length adjusting unit and located on one side of the laser emitting unit. Through the collaborative design of the convex lens and the laser emission unit, the optical path reversibility principle of the convex lens is utilized, and dependence on a small-size and low-emission-port-height special-specification laser emitter is not needed. Even if a laser transmitter with a conventional size is adopted, refracted laser can be infinitely close to the ground, and tiny protrusions can be accurately recognized and measured.

Description

Technical Field

[0001] This invention relates to the field of laser measurement technology, specifically to a laser detection device for ground flatness used in industrial building construction. Background Technology

[0002] Currently, the most common method for checking the flatness of buildings is to place a spirit level against the ground surface and observe the position of the level bubble. The bubble is then centered by continuously adjusting a reference object. However, this method is inconvenient, time-consuming, and labor-intensive. Industrial building construction often involves large surfaces, making this even more time-consuming and labor-intensive. Furthermore, it's difficult to accurately assess the flatness of the entire surface using a spirit level, as the reference standard changes depending on the measurement location, and even two seemingly level surfaces may have different heights. Another method uses a total station to measure ground flatness, but total stations are specialized measuring equipment with complex setup and adjustment processes. The measurement results require calculation, which is beyond the reach of ordinary construction workers. It requires specialized skills and experience, resulting in relatively low measurement efficiency and a relatively high equipment price.

[0003] A search revealed that while Chinese patent CN103925892B proposes a method for measuring the flatness of walls or floors using lasers, its technical design fails to consider the influence of the physical dimensions of the laser emitter. The laser emitter itself has thickness, and there is inevitably a height difference between its horizontal emission port and its bottom (i.e., the "emission port height from the ground"). In industrial building floor inspection, the height of floor protrusions is often only 2-5mm, or even less. If the laser emitter's emission port height from the ground is greater than this protrusion height, the laser beam will directly pass over the protrusion, making effective identification and measurement of the protrusion impossible.

[0004] To solve the above problems, existing patented technologies rely on laser emitters with special specifications where the "emission port height above the ground is less than the ground protrusion height". However, there are very few types of such small-sized laser emitters with low emission port height on the market, and some special specifications require custom production, resulting in high procurement costs. This limits the application scenarios of the patented technology in actual engineering and makes it difficult to promote it on a large scale.

[0005] To address this, we propose a laser-based ground flatness detection device for use in industrial building construction. Summary of the Invention

[0006] In order to overcome the shortcomings of the prior art, the present invention provides a laser detection device for ground flatness used in industrial building construction.

[0007] The technical solution adopted by the present invention is as follows: The present invention provides a laser detection device for ground flatness used in industrial building construction, comprising a housing and a measuring component disposed within the housing. The measuring component includes a laser emitting unit, a lens unit, a focal length adjustment unit, and a height adjustment unit. The height adjustment unit is disposed on the upper side inside the housing, the focal length adjustment unit is disposed at the bottom of the height adjustment unit, the laser emitting unit is disposed at the bottom of the focal length adjustment unit, and the lens unit is disposed at the bottom of the focal length adjustment unit and located on one side of the laser emitting unit. A measuring port is provided at the bottom of the housing, and the lens unit extends movably out of the measuring port.

[0008] Furthermore, the height adjustment unit includes an adjustment screw and a threaded cylinder. The adjustment screw moves through the top of the housing and the threaded cylinder is threaded onto the top of the adjustment screw and located at the top of the housing. The focal length adjustment unit is located at the bottom of the adjustment screw. An annular plate is fixedly provided at the bottom of the threaded cylinder, and a ball bearing is installed at the bottom of the annular plate. The ball bearing makes rolling contact with the top of the housing.

[0009] Furthermore, the focus adjustment unit includes a long housing, an adjusting screw 2, and a moving block. The top of the long housing is fixedly connected to the bottom end of the adjusting screw 1. A guide rod is also fixedly provided on the top of the long housing. The guide rod is located on both sides of the adjusting screw 1 and slides through the top of the long housing. One end of the adjusting screw 2 is rotatably mounted on the inner wall of one side of the long housing through a bearing, and the other end of the adjusting screw 2 passes through the inner wall of the other side of the long housing through a bearing. An elongated opening is provided at the bottom of the long housing. The moving block is threaded onto the adjusting screw 2, and its bottom end slides out of the elongated opening. The laser emitting unit is located at the bottom end of the moving block, and the lens unit is located at the bottom of the long housing, to the left of the elongated opening. The guide rod is provided with scale markings.

[0010] Furthermore, the laser emitting unit includes a mounting plate and a laser emitter. The mounting plate is symmetrically fixed to the bottom of the movable block. A rotating shaft is fixed to the front and rear side walls of the laser emitter, and the two sets of rotating shafts are coaxial. The rotating shaft is rotatably mounted on the mounting plate, and one of the rotating shafts rotates through the mounting plate and is fixed to a worm gear. A bearing seat one is fixed to one of the mounting plates, and a bearing seat two is fixed to the front side wall of the long housing. A worm is rotatably mounted between the bearing seat one and the bearing seat two. The worm meshes with the worm gear, and the top end of the worm moves through the top of the housing and is fixed to a knob one. The laser emitted by the laser emitter passes through the measuring port.

[0011] Furthermore, the laser emitting unit also includes a horizontal positioning rod, and the bottom end of the mounting plate is integrally formed with a corner plate extending to the lower right corner. The horizontal positioning rod is fixed between the two corner plates, and the laser emitter contacts the horizontal positioning rod when it rotates to a horizontal state.

[0012] Furthermore, the lens unit includes a convex lens and a spring. The top of the convex lens is cut with a flat surface. The spring connects the top flat surface of the convex lens to the bottom of the long housing. The convex lens is located on one side of the laser emitter and passes through the measuring port.

[0013] Furthermore, the focal point of the convex lens coincides with the axis of rotation, and the central axis of the laser emitter's emission port and the optical axis of the convex lens are in the same vertical plane.

[0014] Furthermore, the bottom of the housing is also provided with a horizontal adjustment component, which includes a vertical shaft and a triangular base. The top end of the vertical shaft is fixed to the bottom of the housing, and the bottom end of the vertical shaft is rotatably connected to the triangular base through a bearing. A cone head is fixed to the bottom of one end of the triangular base, and leveling screws are threaded to the other two ends of the triangular base. The convex lens is located on one side of the triangular base.

[0015] Furthermore, the left side wall of the enclosure is made of transparent glass, and a crosshair is provided on the transparent glass, with the center point of the crosshair coinciding with the optical axis of the convex lens.

[0016] Furthermore, the bottom of the right side wall of the box is an inclined wall, and the leveling screw is located below the inclined wall; an operating port is opened on the upper side of the right side wall of the box, and one end of the adjusting screw extends out of the operating port and is fixedly connected to the knob.

[0017] The beneficial effects achieved by the present invention using the above structure are as follows:

[0018] 1. This invention utilizes the reversible optical path principle of a convex lens by coordinating the design of a convex lens and a laser emitting unit (aligning the axis of rotation of the laser emitter with the focal point of the convex lens; when the light source is placed at the focal point, the emitted light is refracted into horizontal parallel light). This eliminates the need for a special-specification laser emitter with a "small size and low emission port height." Even with a conventionally sized laser emitter, the refracted laser can be brought infinitely close to the ground (simply adjusting the bottom of the convex lens to contact the ground), accurately identifying and measuring minute protrusions. This overcomes the stringent limitations of existing technologies on laser emitter specifications and avoids application limitations caused by the high cost of specialized equipment.

[0019] 2. This invention utilizes the cone-shaped positioning of the triangular base and the leveling screws to quickly level the device without requiring professional surveying knowledge. Simultaneously, the crosshairs on the transparent glass on the left side of the housing (with their centers coinciding with the optical axis of the convex lens) directly indicate the horizontal state; the laser passing through the center of the crosshairs signifies that the device is level, eliminating the need for additional calibration tools and allowing ordinary construction workers to quickly master the process. The laser emission angle is controlled by a linkage knob using a worm gear-worm wheel-rotor structure; the focal length is precisely adjusted via the adjustment screw two and the moving block; and the height is controlled by the threaded transmission between the adjustment screw one and the threaded cylinder. All operations are completed via mechanical knobs, requiring no complex parameter settings or software calculations, making operation simple.

[0020] 3. The housing of this invention rotates on a triangular base via a bottom vertical axis, allowing for 360° inspection of the surrounding area without moving the entire machine. If the horizontal laser beam is blocked by a ground protrusion after being emitted, the obstruction position can be directly observed and marked without point-by-point measurement. If the laser successfully illuminates the surrounding walls, it indicates that the flatness of the area is qualified, achieving "visual rapid judgment." Compared with the mode of "checking bubbles point by point" with a level and "judging after data calculation" with a total station, the efficiency is significantly improved, and the flatness screening of large-area industrial floors can be completed quickly.

[0021] 4. This invention does not require the purchase of expensive specialized equipment such as total stations, nor does it require the customization of special-specification laser emitters. The core components (laser emitter, convex lens, lead screw, triangular base, etc.) are all conventional industrial accessories, resulting in low procurement costs. Small and medium-sized construction companies can easily afford them, thus solving the problem of "high cost and difficulty in popularization" of existing high-end testing equipment. Attached Figure Description

[0022] The accompanying drawings are provided to further illustrate the invention and form part of the specification. They are used in conjunction with embodiments of the invention to explain the invention and do not constitute a limitation thereof. In the drawings:

[0023] Figure 1 This is a three-dimensional structural diagram of the present invention;

[0024] Figure 2 This is a three-dimensional structural schematic diagram from another perspective of the present invention;

[0025] Figure 3 This is the front view of the present invention;

[0026] Figure 4 This is a three-dimensional structural diagram of the measuring component in this invention;

[0027] Figure 5 This is a three-dimensional structural schematic diagram of the measuring component in this invention from another perspective;

[0028] Figure 6 This is a cross-sectional view of the measuring component in this invention;

[0029] Figure 7 for Figure 4 Enlarged view of point A;

[0030] Figure 8 This is a schematic diagram of the laser beam tilting onto the convex lens in this invention;

[0031] Figure 9 This is a schematic diagram of laser horizontally irradiating a convex lens in this invention.

[0032] The components include: 1. Housing; 2. Measuring assembly; 3. Horizontal adjustment assembly; 4. Crosshair; 5. Operating port; 6. Knob 1; 7. Knob 2; 21. Laser emitting unit; 22. Lens unit; 23. Focus adjustment unit; 24. Height adjustment unit; 25. Measuring port; 241. Adjusting screw 1; 242. Threaded cylinder; 243. Annular plate; 244. Ball bearing; 231. Long housing; 232. Adjusting screw 2. 233. Moving block; 234. Guide rod; 235. Long slot; 211. Mounting plate; 212. Laser emitter; 213. Rotating shaft; 214. Bearing seat one; 215. Bearing seat two; 216. Worm gear; 217. Horizontal positioning rod; 218. Corner plate; 219. Worm wheel; 221. Convex lens; 222. Spring; 31. Vertical shaft; 32. Triangular base; 33. Conical head; 34. Leveling screw. Detailed Implementation

[0033] The technical solutions of the present invention will be clearly and completely described below with reference to the accompanying drawings of the embodiments of the present invention. Obviously, the described embodiments are only some embodiments of the present invention, and not all embodiments. All other embodiments obtained by those skilled in the art based on the embodiments of the present invention without creative effort are within the scope of protection of the present invention.

[0034] In the description of this invention, it should be understood that the terms "upper", "lower", "front", "rear", "left", "right", "top", "bottom", "inner", "outer", etc., indicate the orientation or positional relationship based on the orientation or positional relationship shown in the accompanying drawings. They are only for the convenience of describing this invention and simplifying the description, and do not indicate or imply that the device or element referred to must have a specific orientation, or be constructed and operated in a specific orientation. Therefore, they should not be construed as limitations on this invention.

[0035] like Figures 1-9As shown, the present invention discloses a laser testing device for ground flatness used in industrial building construction, comprising a housing 1 and a measuring component 2 disposed within the housing 1. The measuring component 2 includes a laser emitting unit 21, a lens unit 22, a focal length adjustment unit 23, and a height adjustment unit 24. The height adjustment unit 24 is disposed on the upper side inside the housing 1, the focal length adjustment unit 23 is disposed at the bottom of the height adjustment unit 24, the laser emitting unit 21 is disposed at the bottom of the focal length adjustment unit 23, and the lens unit 22 is disposed at the bottom of the focal length adjustment unit 23 and located on one side of the laser emitting unit 21. A measuring port 25 is provided at the bottom of the housing 1, and the lens unit 22 extends movably out of the measuring port 25.

[0036] Working principle: Through the cooperation of laser emitting unit 21 and lens unit 22, the laser emitted by the laser emitting unit 21 at an angle can be refracted by lens unit 22 and become a horizontally emitted laser. Furthermore, through height adjustment unit 24, the lens unit 22 is brought into contact with the ground, so that the horizontally emitted laser is closer to the ground, thereby enabling more accurate measurement of the height of ground protrusions.

[0037] like Figures 1-5 As shown, the height adjustment unit 24 includes an adjustment screw 241 and a threaded cylinder 242. The adjustment screw 241 moves through the top of the housing 1. The threaded cylinder 242 is threaded onto the top of the adjustment screw 241 and is located on the top of the housing 1. The focal length adjustment unit 23 is located at the bottom of the adjustment screw 241. An annular plate 243 is fixedly provided at the bottom of the threaded cylinder 242. A ball bearing 244 is movably embedded at the bottom of the annular plate 243. The ball bearing 244 rolls in contact with the top of the housing 1 to reduce friction.

[0038] The height adjustment unit 24 allows for height adjustment of the laser emitting unit 21, lens unit 22, and focal length adjustment unit 23, enabling the lens unit 22 to pass through the measuring port 25 and contact the ground. During use, rotating the threaded cylinder 242 moves the adjusting screw 241 up or down, thereby adjusting the height of the focal length adjustment unit 23. Since both the laser emitting unit 21 and the lens unit 22 are mounted on the focal length adjustment unit 23, their heights can be adjusted synchronously.

[0039] like Figures 1-5As shown, the focal length adjustment unit 23 includes a long housing 231, an adjusting screw 232, and a moving block 233. The top of the long housing 231 is fixedly connected to the bottom of the adjusting screw 241. A guide rod 234 is also fixedly provided on the top of the long housing 231. The guide rod 234 is located on both sides of the adjusting screw 241 and slides through the top of the long housing 231. One end of the adjusting screw 232 is rotatably mounted on the inner wall of one side of the long housing 231 through a bearing, and the other end of the adjusting screw 232 passes through the inner wall of the other side of the long housing 231 through a bearing. A long slot 235 is opened at the bottom of the long housing 231. The moving block 233 is threaded onto the adjusting screw 232, and its bottom end slides out of the long slot 235. The laser emitting unit 21 is located at the bottom of the moving block 233, and the lens unit 22 is located at the bottom of the long housing 231 and is located to the left of the long slot 235. The guide rod 234 is provided with scale markings.

[0040] The distance between the laser emitting unit 21 and the lens unit 22 can be adjusted by the focal length adjustment unit 23, so that the laser emitting unit 21 is at the focal point of the lens unit 22. The height adjusted by the height adjustment unit 24 can be known by the scale markings on the guide rod 234 on the top surface of the housing 1.

[0041] like Figures 1-7 As shown, the laser emitting unit 21 includes a mounting plate 211 and a laser emitter 212. The mounting plate 211 is symmetrically fixed to the bottom of the moving block 233. The front and rear side walls of the laser emitter 212 are respectively fixed with rotating shafts 213, and the two sets of rotating shafts 213 are coaxial. The rotating shafts 213 are rotatably mounted on the mounting plate 211, and one of the rotating shafts 213 rotates through the mounting plate 211 and is fixed with a worm gear 219. One of the mounting plates 211 is fixed with a bearing seat 214, and a bearing seat 215 is fixed to the front side wall of the long shell 231. A worm 216 is rotatably mounted between the bearing seat 214 and the bearing seat 215. The worm 216 meshes with the worm gear 219. The top end of the worm 216 moves through the top of the housing 1 and is fixed with a knob 6. The laser emitted by the laser emitter 212 passes through the measuring port 25.

[0042] The laser emission unit 21 can be used to adjust the laser emission angle. In use, the knob 6 at the top of the worm gear 216 is turned to drive the worm gear 216 to rotate. The worm gear 216 drives the worm wheel 219 to rotate, the worm wheel 219 drives the rotating shaft 213 to rotate, and the rotating shaft 213 drives the laser emitter 212. Thus, the emission angle of the laser emitter 212 can be adjusted. The laser emitted by the laser emitter 212 can pass through the measuring port 25 and then irradiate the lens unit 22.

[0043] like Figures 1-9As shown, the laser emitting unit 21 also includes a horizontal positioning rod 217. The bottom end of the mounting plate 211 is integrally formed with a corner plate 218 extending to the lower right corner. The horizontal positioning rod 217 is fixed between the two corner plates 218. When the laser emitter 212 rotates to the horizontal state, it contacts the horizontal positioning rod 217.

[0044] With the horizontal positioning rod 217 in place, when the laser emitter 212 rotates to contact the horizontal positioning rod 217, the laser emitter 212 remains in a horizontal state, and the laser emitted by the laser emitter 212 is in a horizontal state. The horizontal positioning rod 217 plays a positioning function.

[0045] like Figures 1-9 As shown, the lens unit 22 includes a convex lens 221 and a spring 222. The top of the convex lens 221 is cut with a flat surface. The spring 222 is connected between the top flat surface of the convex lens 221 and the bottom of the long housing 231. The convex lens 221 is located on one side of the laser emitter 212. The convex lens 221 passes through the measuring port 25 and is suspended from the bottom of the long housing 231 by the spring 222. The flat surface cut at the top of the convex lens 221 is to facilitate the installation and connection with the spring 222 and also to reduce the space occupied by the convex lens 221 in the housing 1. The cut surface at the top of the convex lens 221 is located above the optical axis of the convex lens 221.

[0046] like Figures 1-9 As shown, the focal point of the convex lens 221 coincides with the axis of the rotation shaft 213, and the central axis of the emission port of the laser emitter 212 is in the same vertical plane as the optical axis of the convex lens 221.

[0047] By cooperating with the lens unit 22 and the laser emitting unit 21, and by adjusting the angle of the laser emitter 212 to illuminate downward to the left, since the axis of the rotating shaft 213 coincides with the focal point of the convex lens 221, the laser will always emerge horizontally from the other side of the convex lens 221 regardless of the angle at which the light emitted by the laser emitter 212 illuminates the convex lens 221. This is because the focusing principle of the convex lens 221 is reversible, meaning the light path is reversible. When a parallel beam passes through the convex lens 221, all the light rays converge at the focal point. If the light source is placed at the focal point, the light emitted will become parallel light after being refracted by the convex lens 221. This allows the laser emitted by the laser emitter 212 to be emitted horizontally close to the ground after passing through the convex lens 221. By adjusting the bottom of the convex lens 221 to contact the ground, the laser can be emitted horizontally close to the ground, no longer limited by the size of the laser emitter 212. This allows the laser to approach the ground infinitely, thus making the detection of ground protrusion height more accurate.

[0048] The distance between the laser emitting unit 21 and the lens unit 22 can be adjusted by the focal length adjustment unit 23, so that the laser emitting unit 21 is at the focal point of the lens unit 22. In use, by rotating the adjustment screw 232, the moving block 233 is driven to slide in the long housing 231, thereby driving the mounting plate 211 and the laser emitter 212 to move, so that the laser emitter 212 moves closer to or further away from the convex lens 221, so that the axis of the rotating shaft 213 coincides with the focal point of the convex lens 221. As for the height of the convex lens 221, springs 222 of different lengths or springs 222 of different elastic coefficients can be selected for height adjustment and suspension, so that the focal point of the convex lens 221 coincides with the axis of the rotating shaft 213.

[0049] like Figures 1-9 As shown, the bottom of the housing 1 is also provided with a horizontal adjustment component 3. The horizontal adjustment component 3 includes a vertical shaft 31 and a triangular base 32. The top end of the vertical shaft 31 is fixed to the bottom of the housing 1, and the bottom end of the vertical shaft 31 is rotatably connected to the triangular base 32 through a bearing. A cone head 33 is fixed to the bottom of one end of the triangular base 32, and leveling screws 34 are threaded to the other two ends of the triangular base 32. The convex lens 221 is located on one side of the triangular base 32.

[0050] When adjusting the horizontal adjustment component 3, the cone head 33 contacts the ground, and then the two leveling screws 34 are adjusted to achieve the horizontal adjustment of the triangular base 32.

[0051] like Figures 1-9 As shown, the left side wall of the box 1 is made of transparent glass, and a crosshair 4 is provided on the transparent glass. The center point of the crosshair 4 coincides with the optical axis of the convex lens 221.

[0052] Since the left side wall of the housing 1 is made of transparent glass, the center point of the crosshair 4 coincides with the optical axis of the convex lens 221. At the same time, the focal point of the convex lens 221 coincides with the axis of the rotating shaft 213, and the central axis of the emission port of the laser emitter 212 is in the same vertical plane as the optical axis of the convex lens 221. Therefore, when the laser emitter 212 is adjusted to a horizontal state, the laser beam emitted by it will coincide with the optical axis of the convex lens 221 and will also pass through the center point of the crosshair 4. When the measuring device is not placed horizontally, and the convex lens 221 is tilted, the laser beam emitted by the laser emitter 212 will not coincide with the optical axis of the convex lens 221. The laser will be refracted and will not pass through the center point of the crosshair 4. In this way, the horizontal state of the measuring device can be adjusted. Only when the laser passes through the center point of the crosshair 4 does it indicate that the measuring device is horizontal. No additional calibration tools are needed to calibrate the horizontality of the measuring device.

[0053] like Figures 1-9As shown, the bottom of the right side wall of the housing 1 is an inclined wall, and the leveling screw 34 is located below the inclined wall. An operation port 5 is provided on the upper side of the right side wall of the housing 1. One end of the adjusting screw 232 extends out of the operation port 5 and is fixedly connected to the knob 7. By setting the bottom of the right side wall of the housing 1 to be an inclined wall, the obstruction of the leveling screw 34 can be avoided, and the adjustment of the leveling screw 34 can be facilitated. The setting of the operation port 5 facilitates the rotation adjustment of the adjusting screw 232.

[0054] When measuring the flatness of the ground surface, first place the device on the ground in the center area of ​​the measuring surface, and then rotate the laser emitter 212 until it contacts the horizontal positioning rod 217. At this time, the laser emitted by the laser emitter 212 is horizontal. After passing through the convex lens 221, the laser passes through the transparent glass on the left side of the housing 1. When the device is horizontal, the laser will pass through the optical axis of the convex lens 221 and the dot of the crosshair 4. When the device is tilted, the convex lens 221 will shift because it is suspended by the spring 222. At this time, the laser will no longer coincide with the optical axis of the convex lens 221. The laser passing through the convex lens 221 will shift and will not pass through the dot of the crosshair 4. At this time, it is necessary to adjust the adjusting screw on the triangular base 32 until the laser passes through the dot of the crosshair 4. This indicates that the device is in a horizontal state.

[0055] Then, adjust the angle of the laser emitter 212 so that it shines downward to the left. Since the axis of the rotating shaft 213 coincides with the focal point of the convex lens 221, the laser will always emerge horizontally from the other side of the convex lens 221 regardless of the angle at which the light emitted by the laser emitter 212 shines on the convex lens 221. This is because the focusing principle of the convex lens 221 is reversible, that is, the light path is reversible. When a parallel beam passes through the convex lens 221, all the light rays converge at the focal point. If the light source is placed at the focal point, the light emitted by it will become parallel light after being refracted by the convex lens 221. This allows the laser emitted by the laser emitter 212 to be emitted horizontally close to the ground after passing through the convex lens 221. As long as the bottom of the convex lens 221 is adjusted to contact the ground, the laser can be emitted horizontally close to the ground, no longer limited by the size of the laser emitter 212. This allows the laser to be infinitely close to the ground, thus making the detection of the height of ground protrusions more accurate.

[0056] If a laser line parallel to the surface being measured cannot illuminate the surrounding wall, it indicates that the light is blocked at the protruding position. The inspector can then observe the blocking and protruding positions and adjust the ground at that location to meet the process requirements. If the surface being measured is flat, the light will illuminate the wall, proving that the flatness of the surface being measured meets the requirements.

[0057] Calculation of the height of the ground protrusion: By rotating the threaded cylinder 242, the adjusting screw 241 moves downward, which in turn moves the long housing 231, spring 222, and convex lens 221 downward simultaneously until the bottom of the convex lens 221 just touches the ground. At this point, the value h1 is read from the scale position on the guide rod 234 corresponding to the top of the housing 1. Then, the emission angle of the laser emitter 212 is adjusted, and the laser beam is emitted horizontally from one side of the bottom of the convex lens 221. If the laser beam is blocked by the ground protrusion, the position of the protrusion blocking the light is marked for subsequent adjustment. Then, the distance h2 between the horizontal laser and the ground is measured with a ruler. h2 is the allowable flatness error of the measured ground. h2 can be large or small, as long as it is kept within the allowable flatness error range. The height of the horizontal laser is adjusted by... The emission angle of the light emitter 212 can be adjusted, and h2 can be controlled within a very small range, thereby increasing the measurement accuracy of the ground protrusion. Then, the threaded cylinder 242 is rotated in the opposite direction, so that the adjusting screw 241 and the long housing 231 rise synchronously, and the convex lens 221 and the laser emitter 212 rise synchronously until the laser is just not blocked by the ground protrusion. At this time, the scale position on the guide rod 234 corresponding to the top of the box 1 is read as the value h3. The difference between the value h3 and the value h1, plus h2, is the height value of the ground protrusion. The vertical shaft 31 at the bottom of the box 1 is rotated on the triangular base 32, which makes it easy for the box 1 to rotate with the vertical shaft 31. The flatness of the plane within a 360° range around the measuring device can be detected without moving the whole machine, thus improving the efficiency of the detection work.

[0058] It should be noted that, in this document, relational terms such as "first" and "second" are used only to distinguish one entity or operation from another, and do not necessarily require or imply any such actual relationship or order between these entities or operations. Furthermore, the terms "comprising," "including," or any other variations thereof are intended to cover non-exclusive inclusion, such that a process, method, article, or apparatus that comprises a list of elements includes not only those elements but also other elements not expressly listed, or elements inherent to such process, method, article, or apparatus.

[0059] The foregoing has shown and described the basic principles, main features, and advantages of the present invention. It will be apparent to those skilled in the art that the invention is not limited to the details of the exemplary embodiments described above, and that the invention can be implemented in other specific forms without departing from its spirit or essential characteristics. Therefore, the embodiments should be considered illustrative and non-limiting in all respects, and the scope of the invention is defined by the appended claims rather than the foregoing description. Thus, all variations falling within the meaning and scope of equivalents of the claims are intended to be included within the scope of the invention. No reference numerals in the claims should be construed as limiting the scope of the claims.

[0060] Furthermore, it should be understood that although this specification describes embodiments, not every embodiment contains only one independent technical solution. This narrative style is merely for clarity. Those skilled in the art should consider the specification as a whole, and the technical solutions in each embodiment can also be appropriately combined to form other embodiments that can be understood by those skilled in the art.

Claims

1. A laser detection device for ground flatness used in industrial building construction, characterized in that: The device includes a housing (1) and a measuring component (2) located inside the housing (1). The measuring component (2) includes a laser emitting unit (21), a lens unit (22), a focal length adjustment unit (23), and a height adjustment unit (24). The height adjustment unit (24) is located on the upper side inside the housing (1). The focal length adjustment unit (23) is located at the bottom of the height adjustment unit (24). The laser emitting unit (21) is located at the bottom of the focal length adjustment unit (23). The lens unit (22) is located at the bottom of the focal length adjustment unit (23) and is located on one side of the laser emitting unit (21). A measuring port (25) is provided at the bottom of the housing (1). The lens unit (22) extends movably out of the measuring port (25).

2. The laser detection device for ground flatness used in industrial building construction according to claim 1, characterized in that: The height adjustment unit (24) includes an adjustment screw (241) and a threaded cylinder (242). The adjustment screw (241) extends through the top of the housing (1). The threaded cylinder (242) is threaded onto the top of the adjustment screw (241) and located at the top of the housing (1). The focal length adjustment unit (23) is located at the bottom of the adjustment screw (241). An annular plate (243) is fixedly provided at the bottom of the threaded cylinder (242). A ball bearing (244) is movably embedded at the bottom of the annular plate (243). The ball bearing (244) rolls in contact with the top of the housing (1).

3. The laser detection device for ground flatness used in industrial building construction according to claim 2, characterized in that: The focal length adjustment unit (23) includes a long housing (231), an adjusting screw two (232), and a moving block (233). The top of the long housing (231) is fixedly connected to the bottom end of the adjusting screw one (241). A guide rod (234) is also fixedly provided on the top of the long housing (231). The guide rod (234) is located on both sides of the adjusting screw one (241), and the guide rod (234) slides through the top of the long housing (231). One end of the adjusting screw two (232) is rotatably mounted on the inner wall of one side of the long housing (231) through a bearing. The other end of the adjusting screw (232) rotates through the inner wall of the other side of the long housing (231) via a bearing. The bottom of the long housing (231) is provided with a long slot (235). The moving block (233) is threaded onto the adjusting screw (232), and its bottom end slides out of the long slot (235). The laser emitting unit (21) is located at the bottom of the moving block (233). The lens unit (22) is located at the bottom of the long housing (231) and is located to the left of the long slot (235). The guide rod (234) is provided with scale markings.

4. The laser detection device for ground flatness used in industrial building construction according to claim 3, characterized in that: The laser emitting unit (21) includes a mounting plate (211) and a laser emitter (212). The mounting plate (211) is symmetrically fixed to the bottom of the movable block (233). Rotating shafts (213) are fixed to the front and rear side walls of the laser emitter (212), respectively, and the two sets of rotating shafts (213) are coaxial. The rotating shafts (213) are rotatably mounted on the mounting plate (211), and one of the rotating shafts (213) rotates through the mounting plate (211) and is fixedly connected to a worm gear (219). A bearing seat 1 (214) is fixedly connected to the mounting plate (211), and a bearing seat 2 (215) is fixedly connected to the front side wall of the long shell (231). A worm gear (216) is rotatably installed between the bearing seat 1 (214) and the bearing seat 2 (215). The worm gear (216) meshes with the worm wheel (219). The top end of the worm gear (216) moves through the top of the housing (1) and is fixedly connected to a knob 1 (6). The laser emitted by the laser emitter (212) passes through the measuring port (25).

5. The laser detection device for ground flatness used in industrial building construction according to claim 4, characterized in that: The laser emitting unit (21) also includes a horizontal positioning rod (217). The bottom end of the mounting plate (211) is integrally formed with a corner plate (218) extending to the lower right corner. The horizontal positioning rod (217) is fixed between the two corner plates (218). When the laser emitter (212) rotates to the horizontal state, it contacts the horizontal positioning rod (217).

6. The laser detection device for ground flatness used in industrial building construction according to claim 5, characterized in that: The lens unit (22) includes a convex lens (221) and a spring (222). The top of the convex lens (221) is cut with a flat surface. The spring (222) is connected between the top flat surface of the convex lens (221) and the bottom of the long housing (231). The convex lens (221) is located on one side of the laser emitter (212) and passes through the measuring port (25).

7. A laser detection device for ground flatness used in industrial building construction according to claim 6, characterized in that: The focal point of the convex lens (221) coincides with the axis of the rotating shaft (213), and the central axis of the emission port of the laser emitter (212) is in the same vertical plane as the optical axis of the convex lens (221).

8. The laser detection device for ground flatness used in industrial building construction according to claim 7, characterized in that: The bottom of the housing (1) is also provided with a horizontal adjustment component (3). The horizontal adjustment component (3) includes a vertical shaft (31) and a triangular base (32). The top end of the vertical shaft (31) is fixed to the bottom of the housing (1). The bottom end of the vertical shaft (31) is rotatably connected to the triangular base (32) through a bearing. A cone head (33) is fixed to the bottom of one end of the triangular base (32). The other two ends of the triangular base (32) are respectively threaded with leveling screws (34). The convex lens (221) is located on one side of the triangular base (32).

9. A laser detection device for ground flatness used in industrial building construction according to claim 8, characterized in that: The left side wall of the box (1) is made of transparent glass, and a crosshair (4) is provided on the transparent glass. The center point of the crosshair (4) coincides with the optical axis of the convex lens (221).

10. A laser detection device for ground flatness used in industrial building construction according to claim 9, characterized in that: The bottom of the right side wall of the box (1) is an inclined wall, and the leveling screw (34) is located below the inclined wall; an operation port (5) is opened on the upper side of the right side wall of the box (1), and one end of the adjusting screw (232) extends out of the operation port (5) and is fixedly connected to the knob (7).

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