Fabricated building component three-dimensional laser scanning quality detector

Abstract

The invention relates to the technical field of building component quality detection, in particular to a fabricated building component three-dimensional laser scanning quality detector which comprises a support, a mounting table, a scanning mirror, a laser transmitter, an air inlet assembly, a drainage assembly and an atomization assembly. The air inlet assembly is matched with the drainage assembly to enable air around the scanning mirror to form a high-speed flowing air curtain, flying dust particles in the air around the scanning mirror are blocked through the air curtain, so that the mirror surface of the scanning mirror is protected, the scanning effect is further guaranteed, and meanwhile particles in air flow are removed through the atomization assembly before the air curtain is formed; therefore, the air curtain airflow is ensured to be clean and transparent, and the influence on the imaging effect caused by the influence on laser reflection is avoided.

Description

Technical Field

[0001] This invention relates to the field of building component quality inspection technology, specifically a three-dimensional laser scanning quality inspection instrument for prefabricated building components. Background Technology

[0002] With the nation's continued promotion of industrialized construction and green construction, prefabricated buildings, with their core advantages of factory prefabrication and efficient on-site assembly, have become an important direction for upgrading the modern construction industry. Prefabricated buildings significantly improve construction efficiency and reduce environmental pollution by pre-producing standardized components in factories and rapidly assembling them on-site. However, the installation accuracy of prefabricated building components directly determines the safety and construction quality of the overall structure. Therefore, high-precision inspection of the dimensions, geometric tolerances, and assembly joints of prefabricated components is particularly important. Currently, 3D laser scanners have become key equipment for inspecting the installation accuracy of prefabricated components. This equipment reflects laser beams through a high-speed rotating scanning mirror (usually driven by a motor, with a rotation speed of thousands of revolutions per minute for efficient scanning over a wide area) and combines this with point cloud data modeling to achieve millimeter-level precision 3D reconstruction, enabling accurate measurement of prefabricated components on the construction site.

[0003] However, dust pollution is a common problem at construction sites, mainly stemming from various processes such as concrete cutting, material transportation, and component grinding. These operations release a large amount of dust particles. When the scanning mirror rotates at high speed, its edges experience intense friction with the air, generating localized high temperatures, with the mirror surface temperature potentially exceeding 50°C. As the temperature rises, the resistivity of the surface material of the scanning mirror increases, preventing the timely discharge of static electricity generated by friction, which then gradually accumulates on the mirror surface. If grounding is chosen to discharge the charge, various environmental factors at the construction site must be considered, especially since the ground may be uneven or poorly insulated, leading to inadequate grounding. When grounding is interrupted or ineffective, static electricity cannot be effectively discharged, and even more charge tends to accumulate.

[0004] When a large amount of static electricity accumulates on the surface of the scanning mirror, it generates a strong electrostatic adsorption effect, attracting and capturing dust particles from the air. These dust particles adhere to the surface of the scanning mirror, significantly reducing the reflectivity of the laser and severely interfering with the normal path of the beam. This interference causes distortion of the scanner's point cloud data, affecting the accuracy of the measurement. Especially under long-term continuous operation, the amount of dust adsorbed gradually increases, which may eventually lead to measurement errors exceeding the allowable range of construction accuracy requirements, thus negatively impacting construction quality and progress.

[0005] Currently, traditional scanners primarily rely on sealed casings or periodic manual cleaning for dust prevention. However, these traditional solutions fail to account for static electricity buildup caused by temperature changes, thus failing to effectively break the vicious cycle of "temperature rise → static electricity → dust attraction." While manual cleaning can remove some dust, the wiping process may damage the delicate scanning mirror, and downtime for cleaning delays work progress and reduces efficiency.

[0006] To address this, a three-dimensional laser scanning quality inspection instrument for prefabricated building components is proposed. Summary of the Invention

[0007] The purpose of this invention is to provide a three-dimensional laser scanning quality inspection instrument for prefabricated building components, which solves the problem of dust particles in the construction environment adhering to the scanning mirror and thus affecting the scanning quality. The airflow is introduced into the diversion component through the air intake component, and with the cooperation of the atomizing component and the diversion component, the airflow with the dust particles removed is formed in the vicinity of the scanning mirror to form a protective air curtain.

[0008] To achieve the above objectives, the present invention provides the following technical solution:

[0009] A three-dimensional laser scanning quality inspection instrument for prefabricated building components includes a support, a mounting platform, a scanning mirror, and a laser emitter. The mounting platform is connected to the support, and the scanning mirror and laser emitter are mounted facing each other on both sides of the mounting platform. It also includes an air intake component, a drainage component, and an atomizing component. The air intake component is connected to the scanning mirror, the drainage component is connected to the mounting platform, and the atomizing component is connected to the drainage component. Outside air is introduced by rotating the air intake component driven by the scanning mirror. Water mist is sprayed onto the introduced air through the atomizing component, and the drainage component causes the treated air to form a high-speed flowing air curtain at the end of the scanning mirror.

[0010] The above solution utilizes the air intake assembly to create a high-speed airflow, forming an air curtain near the lens tip of the scanning mirror to block particulate matter in the working environment. However, the gas entering the air intake assembly usually also contains some particulate matter. Therefore, this solution also includes an atomizing assembly, which, in conjunction with the air intake assembly, alters the airflow pattern. After passing through the atomizing assembly, the airflow is washed by the water mist sprayed from it, thus removing particulate matter from the airflow. On the other hand, the atomized water can also cool the gas, resulting in a better cooling effect on the high-speed rotating scanning mirror, thereby ensuring its service life. In addition, the airflow after being treated by the atomized water can maintain the air humidity near the scanning mirror within a suitable range, thus preventing the generation of static electricity due to an overly dry working environment. This avoids the static effect from adsorbing particulate matter in the air near the scanning mirror, thereby ensuring the scanning effect of the scanning mirror.

[0011] Preferably, the air intake assembly includes a fixed ring and blades. The fixed ring is connected to the main body of the scanning mirror, and a plurality of blades are connected to the fixed ring. The blades are inclined and form a 30-degree angle with the direction of rotation.

[0012] The above scheme uses a fixing ring to fix the blade to the scanning mirror, so that the blade can rotate with the scanning mirror, thereby driving the gas flow and controlling the gas flow direction, thus forming an air curtain that blocks particulate matter.

[0013] Preferably, the drainage assembly includes a sleeve connected to the mounting platform, the sleeve being made of aluminum, and an air inlet being formed between the tail end of the sleeve and the scanning mirror.

[0014] The above solution uses a sleeve to isolate the main body of the scanning mirror from the external environment, thereby preventing the rotation of the blades and the scanning mirror from stirring up the surrounding airflow, which would cause dust particles to accumulate nearby and affect the scanning effect.

[0015] Preferably, the sleeve is further divided into a front section and a rear section. The front section is located at the tail of the scanning mirror, and the rear section is located on the side close to the mirror surface of the scanning mirror. The front section forms a sudden expansion chamber, and the diameter of the chamber changes in a ratio of 1:3.

[0016] With the above scheme, when gas enters the expansion chamber from the air inlet, the chamber will suddenly expand, causing the velocity to drop sharply. Furthermore, the increased flow cross-sectional area will cause large particles to settle, thus purifying and removing dust from the airflow.

[0017] Preferably, the rear section is further divided into a contraction zone, a throat, and a guide zone, and the three are arranged sequentially along the direction from the tail of the scanning mirror to the head.

[0018] With the above scheme, after passing through the expansion chamber, the airflow will pass through the contraction zone, throat and guide zone in sequence. The above structure will form a Venturi effect, thereby increasing the flow rate of the incoming airflow, thus forming an air curtain that blocks external particles and prevents them from affecting the scanning results.

[0019] Preferably, the scanning mirror is provided with a protrusion located in the guide area. The cross-sectional shape of the protrusion is a right triangle, and a flow channel with gradually decreasing space is formed between the protrusion and the inner wall of the guide area.

[0020] The above scheme, through the cooperation of the protrusion and the guide area, gradually reduces the cross-sectional area of ​​the gas flow path, thereby further increasing its flow velocity. When the airflow rushes out of the guide area, it forms a cone-shaped air curtain, which isolates the area near the scanning mirror from the outside world, thus ensuring the imaging effect of the scanning mirror.

[0021] Preferably, the atomizing component includes a water tank and an atomizing nozzle. The water tank is connected to the mounting platform, and the atomizing nozzle is connected to the inner wall of the front section of the sleeve and communicates with the water tank. The atomizing nozzle is inclined and its opening faces the air inlet.

[0022] The above solution allows the atomizing nozzle to spray atomized water in the direction of the airflow, thereby slowing it down and ensuring that particulate matter in the gas is thoroughly washed away by the atomized water. On the other hand, the atomized water can lower the temperature of the airflow, thus cooling the airflow as it passes over the surface of the scanning mirror and ensuring its service life. In addition, it can also prevent the air around the scanning mirror from becoming too dry and prone to static electricity.

[0023] Preferably, a drainage assembly is provided at the lowest point of the expansion chamber of the sleeve. The drainage assembly includes a drain outlet and a movable plug. The drain outlet is located at the lowest point of the sleeve, and the movable plug is movably disposed at the drain outlet. The movable plug is in the shape of an "I".

[0024] With the above method, the water sprayed from the atomizing nozzle will accumulate at the drain at the bottom due to the shape of the expansion chamber. When a certain amount has accumulated, the buoyancy will cause the movable plug to float up, thereby opening the drain, and the accumulated water will be discharged from the drain.

[0025] Compared with the prior art, the beneficial effects of the present invention are as follows:

[0026] 1. The present invention provides a three-dimensional laser scanning quality inspection instrument for prefabricated building components. By using an air intake component in conjunction with a flow guide component, the air around the scanning mirror is made to form a high-speed flowing air curtain. The air curtain blocks dust particles in the air around the scanning mirror, thereby protecting the mirror surface and ensuring the scanning effect. At the same time, before the air curtain is formed, a misting component is used to remove particulate matter in the airflow, thereby ensuring that the airflow of the air curtain is clean and clear, and avoiding its influence on laser reflection and thus affecting the imaging effect.

[0027] 2. The three-dimensional laser scanning quality inspection instrument for prefabricated building components of the present invention, by setting up an atomizing component, on the one hand, utilizes the convection between the generated atomized water and the introduced air to reduce the gas flow rate, thereby enabling the atomized water to fully wash away the particulate matter mixed in the gas. On the other hand, the atomized water cools and humidifies the gas, thereby enabling the airflow to dissipate heat and cool the high-speed rotating scanning mirror, and also keeps the air humidity around the scanning mirror in a moderate state, avoiding the situation where the air is too dry and easily generates static electricity.

[0028] 3. The three-dimensional laser scanning quality inspection instrument for prefabricated building components of the present invention, by setting a sleeve, isolates the main body of the scanning mirror from the outside world, thereby avoiding the rotation of the blades and the scanning mirror from stirring the surrounding airflow, thus preventing dust particles from accumulating nearby and affecting the scanning effect. At the same time, the gas is suddenly decelerated when entering the expansion chamber, thereby causing large particles in the gas to settle. The flow rate of the incoming airflow is increased through the contraction zone, throat and guide zone, thereby forming an air curtain that blocks external particles and prevents them from affecting the scanning results. Attached Figure Description

[0029] Figure 1 This is a schematic diagram of the overall structure of the present invention;

[0030] Figure 2 This is a schematic diagram of the scanning mirror and drainage component of the present invention;

[0031] Figure 3 This is a schematic diagram of the air intake assembly of the present invention;

[0032] Figure 4 This is a schematic diagram of the internal structure of the sleeve of the present invention;

[0033] Figure 5 This is a schematic diagram of the structure of different sections in the sleeve of the present invention;

[0034] Figure 6 This is a structural schematic diagram of the water tank installation location of the present invention;

[0035] Figure 7 For the present invention Figure 4 Enlarged view of point A in the middle;

[0036] Figure 8 This is a flow path diagram of the airflow in this invention.

[0037] In the diagram: a) Expansion chamber; b) Contraction zone; c) Throat; d) Guiding zone; 1) Bracket; 2) Mounting platform; 3) Scanning mirror; 4) Laser emitter; 5) Air intake assembly; 501) Fixing ring; 502) Blade; 6) Drainage assembly; 601) Sleeve; 6011) Front section; 6012) Rear section; 7) Atomizing assembly; 701) Water tank; 702) Atomizing nozzle; 8) Air inlet; 9) Protrusion; 10) Drainage assembly; 1001) Drain outlet; 1002) Movable plug. Detailed Implementation

[0038] The following will clearly and completely describe the technical solutions in the embodiments of the present invention in conjunction with the accompanying drawings. Obviously, the described embodiments are only part of the embodiments of the present invention, not all of the embodiments. Based on the embodiments of the present invention, all other embodiments obtained by ordinary technicians in this field without making creative efforts are within the scope of protection of the present invention.

[0039] Please see Figures 1 to 8 This invention provides a three-dimensional laser scanning quality inspection instrument for prefabricated building components, the technical solution of which is as follows:

[0040] For details, please refer to Figures 1 to 4 A three-dimensional laser scanning quality inspection instrument for prefabricated building components includes a support 1, a mounting platform 2, a scanning mirror 3, and a laser emitter 4. The mounting platform 2 is connected to the support 1. The scanning mirror 3 and the laser emitter 4 are mounted opposite each other on both sides of the mounting platform 2. The instrument also includes an air intake component 5, a flow guiding component 6, and an atomizing component 7. The air intake component 5 is connected to the scanning mirror 3 and forms a high-speed airflow, creating an air curtain near the end of the scanning mirror 3 to block particulate matter in the construction environment. The air intake component 5 includes a fixing ring 501 and blades 502. The fixing ring 501 is connected to the main body of the scanning mirror 3, and multiple blades 502 are connected to the fixing ring 501, allowing the blades 502 to rotate with the scanning mirror 3, thereby driving the gas flow and controlling the gas flow direction to form an air curtain that blocks particulate matter. The blades 502 are inclined and form a 30-degree angle with their rotation direction, allowing the blades 502 to stably push the airflow towards the end of the scanning mirror 3.

[0041] like Figures 4 to 5 As shown, the airflow guiding component 6 is connected to the mounting platform 2. By cooperating with the airflow guiding component 6, the flow state of the airflow is changed, causing the gas to decelerate and then accelerate within the airflow guiding component 6, and causing particulate matter to settle in this process. The airflow guiding component 6 includes a sleeve 601, which is irregularly wavy. The sleeve 601 is connected to the mounting platform 2. The sleeve 601 is made of aluminum and has good thermal conductivity, which allows it to fully dissipate the heat generated by the rotation of the scanning mirror 3. In addition, the sleeve 601 can also be used to isolate the main body of the scanning mirror 3 from the external environment, thereby preventing the rotation of the blades 502 and the scanning mirror 3 from stirring the surrounding airflow, thus causing dust particles to accumulate nearby and affect the scanning effect.

[0042] An air inlet 8 is formed between the tail of the sleeve 601 and the scanning mirror 3. The sleeve 601 is further divided into a front section 6011 and a rear section 6012. The front section 6011 is located at the tail of the scanning mirror 3, and the rear section 6012 is located on the side close to the mirror surface of the scanning mirror 3. The front section 6011 forms a sudden expansion chamber a, and the diameter of the chamber changes in a ratio of 1:3. When the gas enters the sudden expansion chamber a from the air inlet 8, it will experience a sudden increase in the size of the chamber, which will cause the velocity to drop sharply. The increased flow cross-sectional area will also cause large particles to settle, thereby purifying and removing dust from the airflow. The rear section 6012 is further divided into a contraction zone b, a throat c, and a guide zone d. These three are arranged sequentially from the tail to the head of the scanning mirror 3, forming a Venturi effect, which increases the velocity of the incoming airflow and forms an air curtain that blocks external particles, preventing them from affecting the scanning results.

[0043] The scanning mirror 3 is provided with a protrusion 9, which is located in the guide area d. The cross-sectional shape of the protrusion 9 is a right triangle, and a flow channel with gradually narrowing space is formed between the protrusion 9 and the inner wall of the guide area d. Through the cooperation of the protrusion 9 and the guide area d, the cross-sectional area of ​​the gas flow path is gradually reduced, thereby further increasing its flow velocity. When the airflow rushes out from the guide area d, it will form a conical air curtain, thereby isolating the area near the scanning mirror 3 from the outside world, thus ensuring the imaging effect of the scanning mirror 3.

[0044] like Figures 5 to 7 As shown, the atomizing component 7 is connected to the flow guiding component 6. After the airflow passes through the atomizing component 7, it is washed by the water mist sprayed out by it, thereby removing particulate matter from the airflow. The atomizing component 7 includes a water tank 701 and an atomizing nozzle 702. The water tank 701 is connected to the mounting platform 2. The atomizing nozzle 702 is connected to the inner wall of the front section 6011 of the sleeve 601 and communicates with the water tank 701. The temperature of the airflow is reduced by atomizing water, thereby achieving a cooling effect when the airflow blows over the surface of the scanning mirror 3, ensuring its service life. In addition, it can also prevent the air around the scanning mirror 3 from being too dry and prone to static electricity reaction. The atomizing nozzle 702 is set at an angle and the opening is set towards the air inlet 8. After the atomized water is sprayed out, it will generate convection with the airflow, thereby slowing down the airflow and allowing the particulate matter in the gas to be fully washed away by the atomized water.

[0045] The lowest point of the expansion chamber of the sleeve 601 is also provided with a drainage component 10. The drainage component 10 includes a drain outlet 1001 and a movable plug 1002. The drain outlet 1001 is opened at the lowest point of the sleeve 601. The movable plug 1002 is movably disposed at the drain outlet 1001. The water sprayed by the atomizing nozzle 702 will gather near the drain outlet 1001 at the bottom due to the shape of the expansion chamber a. When a certain amount is gathered, the movable plug 1002 will float up due to buoyancy, thereby opening the drain outlet 1001. At this time, the gathered water will be discharged from the drain outlet 1001. The movable plug 1002 is in the shape of "I". The lower side of the movable plug 1002 is provided with multiple slots to facilitate the water flow out after the movable plug 1002 floats up.

[0046] The specific working principle is as follows: air is drawn in through the air intake component 5, forming an air curtain near the scanning mirror 3 that can block surrounding dust particles. At the same time, the flow state of the introduced gas is changed by the flow diversion component 6, causing the particles in the gas to settle during the deceleration and acceleration process. The atomized water sprayed by the atomizing component 7 washes away the particles in the gas, while cooling and humidifying the airflow. On the one hand, the airflow can dissipate heat and cool down the high-speed rotating scanning mirror 3, and on the other hand, it can keep the air humidity around the scanning mirror 3 at a moderate level, avoiding the situation where the air is too dry and easily generates static electricity.

[0047] Specifically, the scanning mirror 3 rotates at high speed, thereby driving the blades 502 connected to it to rotate, so that the gas is drawn into the sleeve 601 from the air inlet 8. When the gas enters the sleeve 601, it first passes through the sudden expansion chamber a of the front section 6011. At this time, due to the sudden increase in the cross-sectional area of ​​the gas flow, the gas velocity will also decrease sharply, causing large particles in the gas to settle. At the same time, the atomizing nozzle 702 sprays atomized water in the direction of gas entry, so that the particulate matter in the gas is fully washed away by the atomized water, and the gas is cooled and humidified. Thus, the airflow plays a role in heat dissipation and cooling of the high-speed rotating scanning mirror 3, and also keeps the air humidity around the scanning mirror 3 at a moderate state, avoiding the air from being too dry and making the static electricity effect easier to generate.

[0048] After the particulate matter is removed, the gas passes through the expansion chamber a and enters the rear section 6012 of the sleeve 601 under the action of the blade 502. At this time, the gas will pass through the contraction zone b, throat c and guide zone d in sequence. When passing through the contraction zone b and throat c, the flow cross-sectional area of ​​the gas will gradually decrease, thereby increasing its flow velocity. The guide zone d will cooperate with the protrusion 9 to guide the flow of the gas, so that the outflowing gas forms a conical air curtain around the end of the scanning mirror 3, thereby protecting it.

[0049] In addition, the atomized water used to remove particulate matter from the gas will flow down the inner wall of the expansion chamber a after use, eventually flowing to the drain outlet 1001. When the water accumulates to a certain level, the buoyancy will lift the movable plug 1002, thereby opening the drain outlet 1001. At this time, the water will flow out from the drain outlet 1001, thus discharging the waste water containing particulate matter. After the equipment is used, a small amount of waste water will remain in the expansion chamber a. The buoyancy generated by this amount of water is not enough to lift the movable plug 1002. At this time, the movable plug 1002 can be manually lifted from below to drain the waste water.

[0050] While embodiments of the present invention have been shown and described, it will be appreciated by those skilled in the art that various changes, modifications, substitutions, and variations may be made to these embodiments without departing from the principles and spirit of the invention, and that the scope of the invention is defined by the appended claims and their equivalents.

Claims

1. A three-dimensional laser scanning quality inspection instrument for prefabricated building components, comprising a support (1), a mounting platform (2), a scanning mirror (3), and a laser emitter (4), wherein the mounting platform (2) is connected to the support (1), and the scanning mirror (3) and the laser emitter (4) are mounted facing each other on both sides of the mounting platform (2), characterized in that: It also includes an air intake assembly (5), a flow guide assembly (6), and an atomizing assembly (7). The air intake assembly (5) is connected to the scanning mirror (3), the flow guide assembly (6) is connected to the mounting platform (2), and the atomizing assembly (7) is connected to the flow guide assembly (6). The air intake assembly (5) is rotated by the scanning mirror (3) to introduce outside air. The atomizing assembly (7) sprays water mist onto the introduced air, and the flow guide assembly (6) causes the treated air to form a high-speed air curtain at the end of the scanning mirror (3).

2. The three-dimensional laser scanning quality inspection instrument for prefabricated building components according to claim 1, characterized in that: The air intake assembly (5) includes a fixed ring (501) and blades (502). The fixed ring (501) is connected to the main body of the scanning mirror (3). Multiple blades (502) are connected to the fixed ring (501). The blades (502) are inclined and form a 30-degree angle with their rotation direction.

3. The three-dimensional laser scanning quality inspection instrument for prefabricated building components according to claim 1, characterized in that: The drainage component (6) includes a sleeve (601) connected to the mounting platform (2). The sleeve (601) is made of aluminum, and an air inlet (8) is formed between the tail of the sleeve (601) and the scanning mirror (3).

4. The three-dimensional laser scanning quality inspection instrument for prefabricated building components according to claim 3, characterized in that: The sleeve (601) is further divided into a front section (6011) and a rear section (6012). The front section (6011) is located at the tail of the scanning mirror (3), and the rear section (6012) is located on the side of the mirror surface of the scanning mirror (3). The front section (6011) forms a sudden expansion chamber (a), and the diameter of the chamber changes in a ratio of 1:

3.

5. A three-dimensional laser scanning quality inspection instrument for prefabricated building components according to claim 4, characterized in that: The rear section (6012) is further divided into a contraction zone (b), a throat (c), and a guide zone (d), and the three are arranged sequentially from the tail of the scanning mirror (3) to the head.

6. A three-dimensional laser scanning quality inspection instrument for prefabricated building components according to claim 5, characterized in that: The scanning mirror (3) is provided with a protrusion (9), which is located in the guide area (d). The cross-sectional shape of the protrusion (9) is a right triangle, and a flow channel with gradually decreasing space is formed between the protrusion (9) and the inner wall of the guide area (d).

7. A three-dimensional laser scanning quality inspection instrument for prefabricated building components according to claim 4, characterized in that: The atomizing component (7) includes a water tank (701) and an atomizing nozzle (702). The water tank (701) is connected to the mounting platform (2), and the atomizing nozzle (702) is connected to the inner wall of the front section (6011) of the sleeve (601) and communicates with the water tank (701).

8. A three-dimensional laser scanning quality inspection instrument for prefabricated building components according to claim 7, characterized in that: The atomizing nozzle (702) is tilted and the opening is oriented toward the air inlet (8).

9. A three-dimensional laser scanning quality inspection instrument for prefabricated building components according to claim 4, characterized in that: The lowest point of the expansion chamber (a) of the sleeve (601) is also provided with a drainage component (10). The drainage component (10) includes a drain outlet (1001) and a movable plug (1002). The drain outlet (1001) is located at the lowest point of the sleeve (601). The movable plug (1002) is movably disposed at the drain outlet (1001). The movable plug (1002) is in the shape of an "I".

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