Building elevation measuring system based on laser radar

Abstract

The invention discloses a building facade measurement system based on a laser radar, and relates to the technical field of measurement, the top end of a vertical pipe is provided with a stable measurement assembly, the top surface of a rising and falling plate is provided with an undercarriage, the top surface of an adapter plate is welded with a clamping boss, one end of the adapter plate is provided with a switching bayonet, and the bottom surface of the switching plate is provided with an unmanned aerial vehicle holder. A laser radar is installed at one end of the unmanned aerial vehicle holder, an inner threaded pipe is welded to the middle of the side face of the drying outer box in a penetrating mode, air spraying pipes are installed at the two ends of the side, away from the drying air pump, of the drying outer box, and a supporting anti-skid assembly is connected to the bottom end of a vertical pipe. One side of the holder of the unmanned aerial vehicle faces downwards, and different structures are used for detection under the conditions of different heights of buildings and different detection requirements, so that detection can be performed under the conditions of different heights of the buildings and high humidity, the detection precision is improved, and the application range is wider.

Description

Technical Field

[0001] This invention relates to the field of measurement technology, specifically to a building facade measurement system based on lidar. Background Technology

[0002] LiDAR (Light Detection and Ranging) is a radar system that uses laser beams to detect the position, velocity, and other characteristics of targets. In building surveying, LiDAR emits laser beams towards buildings and receives the reflected signals, measuring the propagation time of the laser beam in space to determine the target's position and coordinates. This measurement method is characterized by high precision and high efficiency, meeting the needs of building surveying.

[0003] The patent application number CN202322214362.8 mentions "a device for measuring the outer dimensions of an object based on lidar". This device uses a handheld 3D laser scanner to collect the point cloud of the object being measured. Developing an intelligent method for acquiring the dimensions of an object will greatly improve efficiency, ensuring the personal safety of on-site surveyors, reducing labor costs, and improving work efficiency.

[0004] However, when the aforementioned device is used to measure building facades, it will be very difficult to measure if the building is tall and the distance between buildings is small. It cannot be measured at high altitudes. At the same time, due to the limitation of the scanning beam angle, the lidar cannot collect complete terrain point cloud data. It is only suitable for low buildings with little obstruction, and its usability is limited. In addition, the humidity of the environment and the reflection of the building facade will also reduce the measurement accuracy. Multiple factors make it difficult to meet the measurement accuracy requirements. Summary of the Invention

[0005] This invention provides a building facade measurement system based on lidar, which can effectively solve the problems mentioned in the background art, such as the inability of lidar to completely collect terrain point cloud data due to the limitation of scanning beam angle, its applicability to low buildings with little obstruction, its limited range of use, and the fact that environmental humidity and building facade reflections can also reduce measurement accuracy. These multiple factors make it difficult to meet the measurement accuracy requirements.

[0006] To achieve the above objectives, the present invention provides the following technical solution: a building facade measurement system based on lidar, comprising a vertical tube, wherein a stabilizing measurement component is installed at the top of the vertical tube, and the stabilizing measurement component includes a lifting plate; A landing plate is welded to the top of the vertical tube. A landing gear is placed on the top surface of the landing plate. The tops of the two landing gears are respectively welded to the two ends of the bottom surface of the adapter plate. A snap-fit ​​boss is welded to the top surface of the adapter plate. A drone is snap-fitted onto the top surface of the snap-fit ​​boss. A switching slot is opened at one end of the adapter plate. A switching plate is movably snap-fitted onto the inside of the switching slot. A drone gimbal is installed on the bottom surface of the switching plate. A lidar is installed at one end of the drone gimbal. A drying outer box is installed at one end of the bottom surface of the adapter plate. An internally threaded tube is welded through the middle of the side of the drying outer box. An externally threaded tube is installed inside the internally threaded tube by threads. The externally threaded tube is rotatably sleeved on the outside of the drying air pump. Air jet pipes are installed at both ends of the drying outer box on the side away from the drying air pump.

[0007] According to the above technical solution, limit tubes are welded to both sides of the landing plate, and a winding groove is opened in the middle of the limit tube. A winding motor is installed at one end of the limit tube, and a winding shaft is installed at the output shaft end of the winding motor. A winding box is snapped into the winding groove. The winding shaft rotates through the winding box, and a winding roller is fixedly sleeved on the winding shaft inside the winding box. A positioning rope is wound around the outside of the winding roller. The positioning rope is connected to the landing gear. A rope hole is opened in the winding box corresponding to the positioning rope. A camera is installed in the middle of one end of the top surface of the landing plate.

[0008] According to the above technical solution, a concave frame is welded to the middle of the landing gear corresponding to the winding box. The concave frame is movably engaged with the outside of the winding box, and one end of the positioning rope is connected to the middle of the concave frame.

[0009] According to the above technical solution, a drying inner box is movably connected inside the drying outer box. The drying inner box has a drying nozzle corresponding to the air jet pipe. A drying mesh cage is placed inside the drying inner box near the drying nozzle. A perforated partition is installed inside the drying inner box near the drying mesh cage. An anti-fall hole is opened in the drying outer box near the external threaded pipe. One-way rubber sheets are symmetrically bonded inside the end of the air jet pipe away from the drying outer box.

[0010] According to the above technical solution, the diameter of the anti-fall hole is equal to the inner diameter of the internally threaded pipe, the cross-sectional shape and size of the jet pipe are the same as the shape and size of the drying nozzle, and the drying mesh cage is filled with block desiccant.

[0011] According to the above technical solution, the drone gimbal, lidar, and drying air pump are connected to the battery inside the drone via wires. The camera output terminal is electrically connected to the input terminal of the external controller, and the input terminal of the external controller is electrically connected to the output terminal of the external power supply. The drone, drone gimbal, lidar, winding motor, and drying air pump are each electrically connected to the output terminal of the external controller.

[0012] According to the above technical solution, a support and anti-slip assembly is connected to the bottom end of the vertical tube, and the support and anti-slip assembly includes a vertical guide rail; The vertical tube has a vertical guide rail welded to its bottom circumferential array. A guide opening is provided on the outside of the vertical tube inside the vertical guide rail. A cross-shaped inner slide plate is movably engaged inside the vertical tube. A sliding top support is welded to the outside of the cross-shaped inner slide plate on the vertical guide rail. Each of the four sliding top supports is welded to the inside of a lifting outer ring. A magnetic ring is fixedly sleeved at the top of the vertical tube on the vertical guide rail. A near-ground jacking pipe is slidably embedded at the bottom end of the vertical pipe. A grounding box is connected to the bottom end of the near-ground jacking pipe. A columnar airbag is installed between the near-ground jacking pipe and the cross-shaped inner slide plate. The top of the columnar airbag moves through the top surface of the cross-shaped inner slide plate and is connected to a dual-purpose air pump for filling and sucking. The bottom end of the columnar airbag is connected to the grounding box. The bottom surface of the grounding box is evenly provided with anti-slip holes, and the inside of the anti-slip holes is bonded to the bottom edge of the folded rubber blind tube. The top of the inside of the folded rubber blind tube is bonded with an anti-slip cone.

[0013] According to the above technical solution, a cross rod is slidably sleeved on the outside of the near-ground jacking pipe, the top of the inclined support is rotatably connected inside the sliding jacking support, the bottom of the inclined support is rotatably connected to the middle of the top surface of the bottom support, the cross rod moves through the middle of the bottom support, universal wheels are symmetrically installed on the bottom surface of the bottom support, and an embedded storage groove is opened on the bottom surface of the bottom support corresponding to the grounding box.

[0014] According to the above technical solution, the end of the cross-shaped inner slide plate is movably engaged inside the guide port, and the bottom surface of the magnetic ring is magnetically connected to the top surface of the cross-shaped inner slide plate located outside the vertical tube.

[0015] According to the above technical solution, the dual-purpose air pump for charging and suction is connected to the top surface of the cross-shaped inner slide plate by screws, and the input end of the dual-purpose air pump for charging and suction is electrically connected to the output end of the external power supply.

[0016] Compared with the prior art, the beneficial effects of the present invention are as follows: 1. Equipped with a stable measurement component, if the building height is not high, remove the drone from the top of the adapter plate, with one side of the drone gimbal facing upwards. Connect the drone gimbal and lidar to an external power source, move along the building facade, and point the lidar towards the building facade to be inspected to inspect the building facade. If the air humidity is high and the distance between the lidar and the building facade is close, and higher accuracy data is required, air is introduced into the drying box through a drying air pump, and then the air dried by the drying mesh cage is sprayed out through the jet pipe into the space between the lidar and the detection position. By spraying out the dry air, the air humidity between the lidar and the detection position is reduced, the interference of air humidity on the detection is reduced, thereby improving the detection accuracy. If the building is tall, the drone gimbal should face downwards, and the drone should be mounted on the snap-fit ​​protrusion on the top of the adapter plate. As the drone ascends, the winding motor begins to unwind the positioning rope on the outside of the winding roller. The camera continuously monitors the drone's position to prevent it from deviating from the detection position. The detection position and the drone's angle also change, avoiding inaccurate detection due to excessive tilt angles and preventing glare from affecting the detection. This results in good detection effect and high detection accuracy. Different structures can be used for detection under different building heights and different detection needs to ensure that detection is possible under varying building heights and high humidity conditions, thereby improving detection accuracy and broadening the range of applications.

[0017] 2. It is equipped with a support and anti-slip component. If the building height is not high, the inner slide of the cross is at the top of the guide opening. The magnetic ring is attracted and fixed to the outside of the inner slide of the cross. At this time, the four bottom supports at the bottom are close to each other. The dual-purpose air pump draws air from the columnar airbag and the grounding box, pulls the grounding box up, and the folded rubber blind tube bulges up and is inside the grounding box. It is supported by the universal wheel in contact with the ground. If the building is tall, the outer ring of the moving lifting mechanism separates the magnetic ring and the inner sliding plate of the cross. The inner sliding plate slides down along the guide opening. Under the pushing action of the sliding top support and the inclined support rod, the four bottom supports at the bottom slide along the cross rod and move away from each other, expanding the support area. The dual-purpose air pump fills the columnar airbag and grounding box with air, increasing the internal air pressure. The columnar airbag expands and extends, pushing the moving grounding box down. The folded rubber blind tube protrudes downward and is located outside the grounding box. The anti-slip cone contacts the ground and works with the casters for support, expanding the support area while relying on the anti-slip cone to prevent slippage, facilitating subsequent measurement operations. Different support methods are used under different testing conditions to ensure testing accuracy.

[0018] In summary, the stable measurement component is suitable for measuring building facades of different heights and under different obstruction conditions. When higher accuracy measurement is required, the detection path is dried to reduce the impact of humidity, making it more widely applicable and more convenient for testing. The anti-slip support component is designed to be used with different support methods under different testing conditions to match the different testing states of the stable measurement component, resulting in better and more accurate testing results. Attached Figure Description

[0019] The accompanying drawings are provided to further illustrate the invention and form part of the specification. They are used together with the embodiments of the invention to explain the invention and do not constitute a limitation thereof.

[0020] In the attached diagram: Figure 1 This is a schematic diagram of the structure of the present invention; Figure 2 This is a schematic diagram of the structure of the stable measurement component of the present invention; Figure 3 This is a schematic diagram of the installation structure of the recessed frame of the present invention; Figure 4 This is a schematic diagram of the installation structure of the drying inner box of the present invention; Figure 5 This is a schematic diagram of the installation structure of the winding box of the present invention; Figure 6 This is a schematic diagram of the structure of the anti-slip support component of the present invention; Figure 7 This is a schematic diagram of the installation structure of the inclined support rod of the present invention; Figure 8 This is the present invention. Figure 7 A schematic diagram of the structure of region A; Labels in the diagram: 1. Vertical pipe; 2. Stabilizing Measurement Components; 201. Landing Plate; 202. Landing Gear; 203. Adapter Plate; 204. Snap-fit ​​Boss; 205. UAV; 206. Switching Slot; 207. Switching Plate; 208. UAV Gimbal; 209. LiDAR; 210. Limiting Tube; 211. Rewind Groove; 212. Rewind Motor; 213. Rewind Shaft; 214. Rewind Box; 215. Rewind Roller; 216. Positioning Rope; 217. Rope Threading Hole; 218. Camera; 219. Concave Frame; 220. Drying Outer Box; 221. Internal Threaded Tube; 222. External Threaded Tube; 223. Drying Air Pump; 224. Air Jet Pipe; 225. Drying Inner Box; 226. Drying Spray Nozzle; 227. Drying Net Cage; 228. Perforated Partition; 229. Anti-fall Hole; 230. One-way Rubber Sheet; 3. Support anti-slip components; 301. Vertical guide rail; 302. Guide opening; 303. Cross inner slide plate; 304. Sliding top support; 305. Lifting outer ring; 306. Magnetic ring; 307. Near-ground jacking pipe; 308. Grounding box; 309. Columnar airbag; 310. Inflatable and suction dual-purpose air pump; 311. Cross rod; 312. Diagonal support rod; 313. Bottom support; 314. Universal wheel; 315. Embedded storage groove; 316. Anti-slip hole; 317. Folding rubber blind tube; 318. Anti-slip cone. Detailed Implementation

[0021] The preferred embodiments of the present invention will be described below with reference to the accompanying drawings. It should be understood that the preferred embodiments described herein are for illustration and explanation only and are not intended to limit the present invention.

[0022] Example: Figure 1-8As shown, the present invention provides a technical solution for a building facade measurement system based on lidar, including a vertical tube 1, with a stabilizing measurement component 2 installed at the top of the vertical tube 1. The stabilizing measurement component 2 includes a landing plate 201, a landing gear 202, an adapter plate 203, a snap-fit ​​boss 204, a drone 205, a switching bayonet 206, a switching plate 207, a drone gimbal 208, a lidar 209, a limiting tube 210, a winding groove 211, a winding motor 212, a winding shaft 213, a winding box 214, a winding roller 215, a positioning rope 216, a rope threading hole 217, a camera 218, an inner recessed frame 219, a drying outer box 220, an internally threaded tube 221, an externally threaded tube 222, a drying air pump 223, an air jet pipe 224, a drying inner box 225, a drying spray hole 226, a drying net cage 227, a porous partition 228, an anti-fall hole 229, and a one-way rubber sheet 230. A landing plate 201 is welded to the top of the vertical tube 1. A landing gear 202 is placed on the top surface of the landing plate 201. The tops of the two landing gears 202 are respectively welded to the two ends of the bottom surface of the adapter plate 203. A snap-fit ​​boss 204 is welded to the top surface of the adapter plate 203. A drone 205 is snapped onto the top surface of the snap-fit ​​boss 204. A switching slot 206 is opened at one end of the adapter plate 203. A switching plate 207 is movably snapped onto the switching slot 206. A drone gimbal 208 is installed on the bottom surface of the switching plate 207. A lidar 209 is installed at one end of the drone gimbal 208. Limit tubes 210 are welded to both sides of the landing plate 201. A winding groove 211 is provided in the middle of the positioning tube 210. A winding motor 212 is installed at one end of the positioning tube 210. A winding shaft 213 is installed at the output shaft end of the winding motor 212. A winding box 214 is snapped into the winding groove 211. The winding shaft 213 rotates through the winding box 214. A winding roller 215 is fixedly sleeved inside the winding box 214. A positioning rope 216 is wound around the outside of the winding roller 215. The positioning rope 216 is connected to the landing gear 202. A rope hole 217 is provided in the winding box 214 corresponding to the positioning rope 216. A camera 218 is installed in the middle of one end of the top surface of the landing plate 201. A drying outer box 220 is installed on one end of the bottom surface of the adapter plate 203. An internally threaded tube 221 is welded through the middle of the side of the drying outer box 220. An externally threaded tube 222 is installed inside the internally threaded tube 221 through threads. The externally threaded tube 222 is rotatably sleeved on the outside of the drying air pump 223. Air jet pipes 224 are installed on both ends of the side of the drying outer box 220 away from the drying air pump 223. The drone gimbal 208, the lidar 209 and the drying air pump 223 are connected to the battery inside the drone 205 through wires. The output end of the camera 218 is electrically connected to the input end of the external controller. The input end of the external controller is electrically connected to the output end of the external power supply. The drone 205, the drone gimbal 208, the lidar 209, the take-up motor 212 and the drying air pump 223 are respectively electrically connected to the output end of the external controller to ensure that the drone 205, the drone gimbal 208, the lidar 209, the take-up motor 212, the camera 218 and the drying air pump 223 can work normally.

[0023] A recessed frame 219 is welded to the middle of the landing gear 202 corresponding to the winding box 214. The recessed frame 219 is movably engaged with the outside of the winding box 214. One end of the positioning rope 216 is connected to the middle of the recessed frame 219. A drying inner box 225 is movably engaged inside the drying outer box 220. A drying nozzle 226 is opened in the drying inner box 225 corresponding to the jet pipe 224. A drying mesh cage 227 is placed inside the drying inner box 225 near the drying nozzle 226. A perforated partition 228 is installed at 27 locations. A fall-prevention hole 229 is provided near the external threaded pipe 222 in the drying outer box 220. The diameter of the fall-prevention hole 229 is equal to the inner diameter of the internal threaded pipe 221. The cross-sectional shape and size of the jet pipe 224 are the same as those of the drying nozzle 226. The drying mesh cage 227 is filled with block desiccant to facilitate the drying of the incoming air and its spraying to the vicinity of the detection position. A one-way rubber sheet 230 is symmetrically bonded to the inside of the jet pipe 224 away from the drying outer box 220.

[0024] The bottom end of the vertical tube 1 is connected to a support and anti-slip assembly 3, which includes a vertical guide rail 301, a guide opening 302, a cross inner slide plate 303, a sliding top support 304, an inner lifting outer ring 305, a magnetic ring 306, a near-ground jacking tube 307, a grounding box 308, a columnar airbag 309, a dual-purpose air pump for filling and sucking 310, a cross rod 311, an inclined support rod 312, a bottom support 313, a caster wheel 314, an embedded storage groove 315, an anti-slip hole 316, a folding rubber blind tube 317, and an anti-slip cone 318. A vertical guide rail 301 is welded to the bottom of the vertical tube 1 in a circumferential array. A guide opening 302 is provided on the outside of the vertical tube 1 inside the vertical guide rail 301. A cross-shaped inner slide plate 303 is movably engaged inside the vertical tube 1. A sliding top support 304 is welded to the outside of the cross-shaped inner slide plate 303 on the vertical guide rail 301. Each of the four sliding top supports 304 is welded to the inside of a lifting outer ring 305. A magnetic ring 306 is fixedly sleeved at the top of the vertical tube 1 on the vertical guide rail 301. The end of the cross-shaped inner slide plate 303 is movably engaged inside the guide opening 302. The bottom surface of the magnetic ring 306 is magnetically connected to the top surface of the cross-shaped inner slide plate 303 on the outside of the vertical tube 1, so that the cross-shaped inner slide plate 303 can slide along the guide opening 302 and be attracted and limited by the magnetic ring 306 at the top. A ground jacking pipe 307 is slidably embedded at the bottom end of the vertical pipe 1. A grounding box 308 is connected to the bottom end of the ground jacking pipe 307. A cylindrical airbag 309 is installed between the ground jacking pipe 307 and the cross-shaped inner slide plate 303. The top of the cylindrical airbag 309 moves through the top surface of the cross-shaped inner slide plate 303 and is connected to a charging / suction dual-purpose air pump 310. The charging / suction dual-purpose air pump 310 is connected to the top surface of the cross-shaped inner slide plate 303 by screws. The input end of the charging / suction dual-purpose air pump 310 is electrically connected to the output end of an external power supply for easy installation of the charging / suction dual-purpose air pump. Pump 310 is used to ensure normal operation. The bottom end of columnar airbag 309 is connected to grounding box 308. A cross rod 311 is slidably sleeved on the outside of near-ground jacking pipe 307. The top end of inclined support rod 312 is rotatably connected to the inside of sliding jacking support 304. The bottom end of inclined support rod 312 is rotatably connected to the middle of the top surface of bottom support 313. Cross rod 311 moves through the middle of bottom support 313. Universal wheels 314 are symmetrically installed on the bottom surface of bottom support 313. An embedded storage groove 315 is opened on the bottom of bottom support 313 corresponding to grounding box 308. The bottom surface of the grounding box 308 is evenly provided with anti-slip holes 316. The anti-slip holes 316 are bonded to the bottom edge of the folded rubber blind tube 317. The top of the folded rubber blind tube 317 is bonded with an anti-slip cone 318.

[0025] The working principle and usage process of this invention are as follows: Move the device to the vicinity of the building facade to be tested. If the building height is not high and easy to measure, pull the lifting outer ring 305, and the cross inner slide plate 303 to the top of the guide port 302. The magnetic ring 306 is attracted and fixed to the outside of the cross inner slide plate 303. At this time, the four bottom supports 313 at the bottom end move closer to each other. The dual-purpose air pump 310 draws air from the columnar air bag 309 and the grounding box 308. The internal air pressure is low, the columnar air bag 309 contracts inward, and the grounding box 308 is pulled upward, causing the folded rubber blind tube 317 to bulge upward. The drone 205 is placed inside the grounding box 308 and supported by the casters 314. Then, the drone 205 is removed from the top of the adapter plate 203, and the switching plate 207 is taken out from the switching slot 206. With one side of the drone gimbal 208 facing upward, the switching plate 207 is installed into the switching slot 206. The drone gimbal 208 and the lidar 209 are connected to an external power source, and the landing plate 201 is pushed to move along the building facade. The lidar 209 is oriented towards the building facade to be detected and detects the building facade. This method is suitable for low-rise building facades with little obstruction. If the air humidity is high during the detection process, and the distance between the lidar 209 and the building facade is close, requiring higher precision data, then block-shaped desiccant is placed inside the drying cage 227. The drying cage 227 is snapped onto one side of the porous partition 228 of the inner drying box 225. Next, the inner drying box 225 is inserted into the outer drying box 220, and the drying nozzle 226 is aligned with the air jet pipe 224, and the anti-fall hole 229 is aligned with the internal threaded pipe 221. The drying air pump 223, with the external threaded pipe 222 attached to its outer side, is taken out and connected to the external threaded pipe 222 through threads inside the internal threaded pipe 221. The external threaded pipe 222 is rotated until it is inserted into the anti-fall hole 229, preventing the inner drying box 225 from falling out of the drying chamber. During the detection process, the outer box 220 receives air through the drying air pump 223 into the drying inner box 225. The air dried by the drying mesh cage 227 is then sprayed out through the jet pipe 224 into the space between the lidar 209 and the detection position. At this time, care should be taken to avoid excessive airflow velocity that could affect the detection. By spraying out dry air, the humidity between the lidar 209 and the detection position is reduced, thus minimizing the interference of air humidity on the detection and improving the detection accuracy. The one-way rubber sheet 230 prevents humid air from entering the drying inner box 225 and causing the desiccant to fail when the drying air pump 223 is not running. Only when the drying air pump 223 is running can the air push open the one-way rubber sheet 230 for drying. If the building is tall, relying solely on handheld measurement will result in a large tilt angle between the measurement point and the lidar 209, leading to incomplete and inaccurate measurements. In this case, the movable lifting outer ring 305, magnetic ring 306, and cross inner slide plate 303 are pushed apart. The cross inner slide plate 303 slides down along the guide opening 302. Under the pushing action of the sliding top support 304 and the inclined support rod 312, the four bottom supports 313 at the bottom end slide along the cross rod 311 and move away from each other, expanding the support area. The dual-purpose air pump 310 fills the columnar airbag 309 and grounding box 308 with air, increasing the internal air pressure. The columnar airbag 309 expands and extends, pushing the movable grounding box 308 downward. The folded rubber blind tube 317 protrudes downward and is located outside the grounding box 308. The anti-slip cone 318 contacts the ground and works with the caster wheel 314 to provide support, expanding the support area while relying on the anti-slip cone 318 to prevent it from sliding, facilitating subsequent measurement operations. Next, the switching plate 207 is taken out from the switching slot 206. With one side of the drone gimbal 208 facing downwards, the switching plate 207 is installed into the switching slot 206. The drone 205 is then attached to the snap-fit ​​protrusion 204 on the top surface of the adapter plate 203. The drone gimbal 208 and the lidar 209 are connected to the drone 205's battery for power. The drone 205 starts up and begins to rise. As it rises, the winding motor 212 begins to unwind the positioning rope 216 on the outside of the winding roller 215. The positioning rope 216 is continuously released through the rope hole 217. The drone 205 rises, and as it rises, it relies on the lidar 209 to detect the building's facade. During the detection process, the winding motor 212 steadily unwinds the rope to prevent the drone 205 from rising too fast. The camera 218 continuously monitors the drone 205's position to prevent it from deviating from the detection position. The detection position and the angle of the drone 205 also change to avoid inaccurate detection due to excessive tilt angles and to avoid the problem of reflection affecting the detection. After the drone 205 ascends to near the top of the building facade and completes the inspection of that area, the drone 205 slowly descends, and the winding motor 212 begins to wind up the positioning rope 216 on the outside of the winding roller 215 until the concave frame 219 is engaged with the outside of the winding box 214, completing the inspection and retrieval operation. Then, the device is moved to another position and the above steps are repeated to inspect other areas. The inspection effect is good and the inspection accuracy is high. It is suitable for tall building facades that are obscured or reflective. The stable measurement component 2 is suitable for measuring building facades of different heights and under different obstruction conditions. When higher accuracy measurement is required, the detection path is dried to reduce the impact of humidity, making it more widely applicable and more convenient for detection. The support and anti-slip component 3 is used in conjunction with different support methods under different detection conditions to match the different detection states of the stable measurement component 2, resulting in better and more accurate detection results.

[0026] Finally, it should be noted that the above descriptions are merely preferred embodiments of the present invention and are not intended to limit the present invention. Although the present invention has been described in detail with reference to the foregoing embodiments, those skilled in the art can still modify the technical solutions described in the foregoing embodiments or make equivalent substitutions for some of the technical features. Any modifications, equivalent substitutions, improvements, etc., made within the spirit and principles of the present invention should be included within the protection scope of the present invention.

Claims

1. A building facade measurement system based on lidar, comprising a vertical tube (1), characterized in that: A stabilizing measuring component (2) is installed at the top of the vertical tube (1), and the stabilizing measuring component (2) includes a lifting plate (201). The top of the vertical tube (1) is welded with a landing plate (201), and a landing gear (202) is placed on the top surface of the landing plate (201). The tops of the two landing gears (202) are respectively welded to the two ends of the bottom surface of the adapter plate (203). The top surface of the adapter plate (203) is welded with a snap-fit ​​boss (204). The top surface of the snap-fit ​​boss (204) is snap-fitted with a drone (205). One end of the adapter plate (203) is provided with a switching slot (206). The switching slot (206) is movably snap-fitted with a switching plate (207). The bottom surface of the switching plate (207) is equipped with a drone gimbal (208). One end of the drone gimbal (208) is equipped with a laser radar (209). A drying outer box (220) is installed on one end of the bottom surface of the adapter plate (203). An internal threaded tube (221) is welded through the middle of the side of the drying outer box (220). An external threaded tube (222) is installed inside the internal threaded tube (221) by threads. The external threaded tube (222) is rotatably sleeved on the outside of the drying air pump (223). Air jet pipes (224) are installed at both ends of the side of the drying outer box (220) away from the drying air pump (223).

2. The building facade measurement system based on lidar according to claim 1, characterized in that, Both sides of the landing plate (201) are welded with limit tubes (210). A winding groove (211) is provided in the middle of the limit tube (210). A winding motor (212) is installed at one end of the limit tube (210). A winding shaft (213) is installed at the output shaft end of the winding motor (212). A winding box (214) is snapped into the winding groove (211). The winding shaft (213) rotates through the winding box (214). A winding roller (215) is fixedly sleeved inside the winding box (214). A positioning rope (216) is wound around the outside of the winding roller (215). The positioning rope (216) is connected to the landing gear (202). A rope hole (217) is provided in the winding box (214) corresponding to the positioning rope (216). A camera (218) is installed in the middle of one end of the top surface of the landing plate (201).

3. The building facade measurement system based on lidar according to claim 2, characterized in that, A recessed frame (219) is welded to the middle of the landing gear (202) corresponding to the winding box (214). The recessed frame (219) is movably engaged with the outside of the winding box (214). One end of the positioning rope (216) is connected to the middle of the recessed frame (219).

4. The building facade measurement system based on lidar according to claim 1, characterized in that, The drying outer box (220) is movably connected to the drying inner box (225). The drying inner box (225) has a drying nozzle (226) at the position corresponding to the air jet pipe (224). A drying mesh cage (227) is placed inside the drying inner box (225) near the drying nozzle (226). A perforated partition (228) is installed inside the drying inner box (225) near the drying mesh cage (227). An anti-fall hole (229) is opened in the drying outer box (220) near the external threaded pipe (222). A one-way rubber sheet (230) is symmetrically bonded to the end of the air jet pipe (224) away from the drying outer box (220).

5. A building facade measurement system based on lidar according to claim 4, characterized in that, The diameter of the anti-fall hole (229) is equal to the inner diameter of the internally threaded pipe (221), the cross-sectional shape and size of the jet pipe (224) are the same as the shape and size of the drying nozzle (226), and the drying mesh cage (227) is filled with block desiccant.

6. A building facade measurement system based on lidar according to claim 2, characterized in that, The UAV gimbal (208), lidar (209), and drying air pump (223) are connected to the battery inside the UAV (205) via wires. The output of the camera (218) is electrically connected to the input of the external controller, and the input of the external controller is electrically connected to the output of the external power supply. The UAV (205), UAV gimbal (208), lidar (209), winding motor (212), and drying air pump (223) are respectively electrically connected to the output of the external controller.

7. A building facade measurement system based on lidar according to claim 1, characterized in that, The bottom end of the vertical tube (1) is connected to a support anti-slip component (3), which includes a vertical guide rail (301). The vertical tube (1) has a vertical guide rail (301) welded to its bottom circumferential array. A guide opening (302) is provided on the outside of the vertical tube (1) inside the vertical guide rail (301). A cross-shaped inner sliding plate (303) is movably engaged inside the vertical tube (1). A sliding top support (304) is welded to the outside of the cross-shaped inner sliding plate (303) outside the vertical guide rail (301). Each of the four sliding top supports (304) has a lifting outer ring (305) welded inside. A magnetic ring (306) is fixedly sleeved at the top of the vertical tube (1) at the vertical guide rail (301). The bottom end of the vertical pipe (1) is slidably embedded with a near-ground jacking pipe (307), the bottom end of the near-ground jacking pipe (307) is connected to a grounding box (308), a columnar airbag (309) is installed between the near-ground jacking pipe (307) and the cross inner slide plate (303), the top end of the columnar airbag (309) is movable through the top surface of the cross inner slide plate (303) and connected to a charging and suction dual-purpose air pump (310), and the bottom end of the columnar airbag (309) is connected to the grounding box (308). The grounding box (308) has anti-slip holes (316) evenly distributed on the bottom surface. The anti-slip holes (316) are bonded to the bottom edge of the folded rubber blind tube (317). The top of the folded rubber blind tube (317) is bonded to an anti-slip cone (318).

8. A building facade measurement system based on lidar according to claim 1, characterized in that, A cross rod (311) is slidably sleeved on the outside of the near-ground jacking pipe (307). The top of the inclined support rod (312) is rotatably connected inside the sliding jacking support (304). The bottom of the inclined support rod (312) is rotatably connected to the middle of the top surface of the bottom support (313). The cross rod (311) moves through the middle of the bottom support (313). Universal wheels (314) are symmetrically installed on the bottom surface of the bottom support (313). An embedded storage groove (315) is opened on the bottom surface of the bottom support (313) corresponding to the grounding box (308).

9. A building facade measurement system based on lidar according to claim 7, characterized in that, The end of the cross inner slide plate (303) is movably engaged inside the guide port (302), and the bottom surface of the magnetic ring (306) is magnetically connected to the top surface of the cross inner slide plate (303) located outside the vertical tube (1).

10. A building facade measurement system based on lidar according to claim 7, characterized in that, The dual-purpose air pump (310) is connected to the top surface of the cross inner slide plate (303) by screws, and the input end of the dual-purpose air pump (310) is electrically connected to the output end of the external power supply.

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