Laser detection device and method

Abstract

The invention discloses a laser detection device and method, the laser detection device comprises a detection table and a laser range finder, the detection table is provided with a suspension arm, the suspension arm is provided with a turnover mechanism, the suspension arm is internally provided with a lens cleaning mechanism, the upper end of the detection table is provided with a conveyor belt, a display screen, a controller host and an alarm lamp, and the suspension arm is located above the conveyor belt; the air compressor, the motor and the submersible pump are electrically connected with the controller host, the controller host controls the operation of each device, the turnover mechanism comprises a turnover cover, a motor, a worm gear and a worm, the suspension arm is provided with a detection window corresponding to the turnover cover, the motor is fixedly installed in the suspension arm, and the lower end face of the top of the suspension arm is provided with a shaft seat. A fixedly-connected rotating shaft is arranged on the side face of the turning cover. The laser detection device has the advantages of being high in detection precision and easy to clean, and solves the problems that dust is easily attached to the detection lens of the laser detection device in the prior art, the detection precision is affected, and the production efficiency is affected due to inconvenient cleaning of the detection lens.

Description

Technical Field

[0001] The present invention relates to the technical field of plastic product thickness detection, in particular to a laser detection device and method. Background Art

[0002] In the production process of plastic panels, in order to ensure the quality and consistency of the products, it is usually necessary to accurately measure the processed plastic parts. Laser rangefinders have been widely used in the thickness and flatness detection of plastic parts due to their advantages such as non-contact measurement, fast response speed and high accuracy.

[0003] On the production line of plastic parts, after the plastic parts pass the thickness test, they need to undergo subsequent processing steps such as cutting. A large amount of debris and dust will be generated during the cutting process. The lens of the laser rangefinder is exposed to the air for a long time and is easily affected by pollutants such as dust and cutting chips. These pollutants will affect the measurement accuracy and cause inaccurate product inspection results. Existing laser rangefinders are usually exposed to the production environment and require regular manual cleaning and maintenance, which not only increases maintenance costs but also reduces production efficiency. Therefore, a laser detection device and method are needed to solve the above problems. Summary of the invention

[0004] The purpose of the present invention is to provide a laser detection device and method, which have the advantages of high detection accuracy and easy cleaning, and solve the problems in the prior art that the detection lens of the laser detection device is easily adhered to dust, affecting the detection accuracy, and the detection lens is inconvenient to clean, affecting production efficiency.

[0005] To achieve the above object, the present invention provides the following technical solution: a laser detection device, comprising a detection platform and a laser rangefinder, a suspension arm is arranged on the detection platform, a flip mechanism is arranged on the suspension arm, and a lens cleaning mechanism is arranged inside the suspension arm; A conveyor belt, a display screen, a controller host and an alarm light are arranged at the upper end of the test bench. The boom is located above the conveyor belt. The air compressor, the motor, the submersible pump are electrically connected to the controller host, and the operation of each device is controlled by the controller host. The flip mechanism includes a flap, a motor, a worm gear and a worm. A detection window corresponding to the flap is provided on the suspension arm. The motor is fixedly installed in the suspension arm. A shaft seat is provided on the top lower end surface of the suspension arm. A fixedly connected rotating shaft is provided on the side of the flap. The rotating shaft passes through the shaft seat and is rotatably connected thereto. The worm is fixedly installed on the output shaft of the motor. The worm gear is fixedly installed on the rotating shaft. The motor and the rotating shaft are connected through the worm gear and the worm. A mounting platform is provided on the side of the flap. The laser rangefinder is fixedly installed on the mounting platform.

[0006] As a preferred laser detection device of the present invention, the lens cleaning mechanism includes a cleaning table, a cleaning tank is arranged on the cleaning table, an air flow channel and a cleaning liquid nozzle are arranged in the cleaning tank, a lifting air pipe, a rotating air pipe and a wiping ball head are arranged in the air flow channel, the cleaning table is fixedly installed at the bottom of the boom, the lifting air pipe is inserted into the air flow channel and is slidably connected to it, the rotating air pipe is inserted into the lifting air pipe and is rotatably connected to it, and the wiping ball head is fixedly installed on the rotating air pipe.

[0007] As a preferred laser detection device of the present invention, a cleaning liquid storage tank is provided in the boom, a submersible pump is provided in the cleaning liquid storage tank, a water outlet of the submersible pump is through-connected with the cleaning liquid nozzle, a drain outlet is provided at the bottom of the cleaning tank, and a waste liquid pipe is provided at the bottom of the drain outlet.

[0008] As a preferred laser detection device of the present invention, a slide groove is arranged in the air flow channel, a first flange cooperating with the slide groove is arranged on the side of the lifting air pipe, a second flange and a third flange are arranged on the inner end surface of the lifting air pipe, a steel ball and a spring are arranged between the second flange and the third flange, the steel ball and the second flange are elastically connected by a spring, and the third flange is a conical cylindrical structure.

[0009] As a preferred laser detection device of the present invention, the inner end face of the rotating air tube is provided with spiral fan blades in an equidistant circular array, the top of the rotating air tube is provided with a central air tube and offset air holes, the wiping ball head is installed on the central air tube, and the offset air holes are arranged in an equidistant circular array around the central air tube.

[0010] As a preferred embodiment of the laser detection device of the present invention, the wiping ball head is made of sponge material, and a microfiber layer is provided on the surface of the wiping ball head.

[0011] As a preferred laser detection device of the present invention, a detection lens is provided at the bottom of the laser rangefinder, a fourth flange is provided at the edge of the detection lens, and a sealing ring cooperating with the fourth flange is provided at the edge of the cleaning tank.

[0012] As a preferred laser detection device of the present invention, an air compressor is arranged on the side of the detection platform, and the air outlet of the air compressor is connected to the air flow channel.

[0013] As a preferred laser detection device of the present invention, the number of the laser rangefinders is one to three, the laser rangefinders are arranged in an equidistant array on a mounting table, and the number of the cleaning mechanisms is equal to the number of the laser rangefinders.

[0014] A laser detection method comprises the following steps: Step 1: Preparation: Turn on the power of the test bench, make sure all equipment is in standby mode, initialize the system through the controller host, and set various parameters; Step 2: During the inspection process, the motor drives the worm gear mechanism to adjust the flap angle so that the laser rangefinder is aligned with the upper end surface of the conveyor belt. The plate to be inspected is placed on the conveyor belt. The plate moves with the conveyor belt to the bottom of the boom. The laser rangefinder starts working and calculates the thickness and flatness data of the plate through the change of distance measurement data. The measurement results are displayed in real time on the display screen of the inspection table. The plate is judged whether it meets the requirements according to the set standards. If it fails, the alarm light will be triggered to alarm. Step 3, finish the work. After the measurement is completed, start the motor through the controller host, so that the flip mechanism drives the laser rangefinder to be retracted into the boom, and clean the detection lens of the laser rangefinder through the cleaning mechanism.

[0015] Compared with the prior art, the present invention has the following beneficial effects: 1. The present invention uses a motor-driven flipping mechanism to enable the laser rangefinder to automatically flip outward when needed and align it with the workpiece to be detected for detection. After the detection is completed, the flipping mechanism is activated again to store the laser rangefinder in the boom, which can effectively prevent pollutants such as dust and cutting chips generated in the subsequent processing process from falling on the lens of the laser rangefinder, preventing these impurities from affecting the detection accuracy of the laser rangefinder. By storing the laser rangefinder in the boom, it can also protect it from external environmental factors such as temperature changes, humidity, etc., which helps to extend the service life of the equipment.

[0016] 2. After the detection is completed, the present invention can automatically start the cleaning mechanism to clean the lens of the laser rangefinder without manual intervention, which not only saves manpower but also ensures that the lens is clean before each use, thereby ensuring the accuracy of each detection. The automated cleaning process also reduces errors caused by human factors and improves the reliability of the overall system. The complex lens cleaning mechanism is integrated into the boom, which not only saves space but also facilitates maintenance.

[0017] 3. The lens cleaning mechanism of the present invention cooperates with liquid and gas cleaning. Liquid cleaning utilizes a cleaning liquid nozzle to spray cleaning liquid, which can effectively remove dust, oil and other impurities on the lens surface to ensure the cleanliness of the lens surface. The airflow generated by the air compressor can, on the one hand, push the lifting air pipe to move up and down, so that the wiping ball head contacts the lens and is squeezed and deformed to better fit the lens surface; on the other hand, the airflow passes through the wiping ball head to accelerate its drying process. This combination of liquid cleaning and airflow drying can not only efficiently remove dirt on the lens surface, but also quickly dry the lens surface to avoid residual water stains affecting the accuracy of subsequent detection. Since the cleaning and drying processes are efficient and fast, it can ensure that the detection equipment is in the best condition at any time, thereby improving the efficiency of the overall detection line. BRIEF DESCRIPTION OF THE DRAWINGS

[0018] Figure 1 It is a schematic diagram of the overall structure of the present invention; Figure 2 It is a front cross-sectional view of the present invention; Figure 3 It is a schematic diagram of the coordination state of the boom, the flip mechanism and the laser rangefinder of the present invention; Figure 4 It is an exploded view of the boom, the flip mechanism and the lens cleaning mechanism of the present invention; Figure 5 It is a schematic diagram of the structure of the flipping mechanism of the present invention; Figure 6 It is a front cross-sectional view of the coordination state of the suspension arm, the turnover mechanism, the lens cleaning mechanism and the laser rangefinder of the present invention; Figure 7 For the present invention Figure 6 Enlarged view of point A in the middle; Figure 8 For the present invention Figure 7 Enlarged view of point B in the middle; Fig. 9 An exploded view of the cleaning station of the present invention; Fig.10 It is a cross-sectional structural schematic diagram of the lifting air pipe, the rotating air pipe and the wiping ball head in the matching state of the present invention; Fig.11 It is a schematic diagram of the rotating air pipe structure of the present invention.

[0019] In the figure: 1. test table; 101. conveyor belt; 102. display screen; 103. controller host; 104. alarm light; 2. laser rangefinder; 201. test lens; 202. fourth flange; 3. boom; 301. test window; 4. flip mechanism; 401. flip cover; 4011. mounting table; 402. shaft seat; 4021. rotating shaft; 403. motor; 404. worm gear; 405. worm; 5. lens cleaning mechanism; 501. cleaning liquid storage tank; 502. submersible pump; 503. cleaning table; 5031, cleaning slot; 5032, air flow channel; 5033, drain outlet; 5034, sealing ring; 5035, cleaning liquid nozzle; 5036, slide; 504, air compressor; 505, lifting air pipe; 5051, second flange; 5052, spring; 5053, steel ball; 5054, first flange; 5055, third flange; 506, rotating air pipe; 5061, central air pipe; 5062, offset air hole; 5063, spiral fan blade; 507, wiping ball head; 5071, microfiber layer. DETAILED DESCRIPTION

[0020] See also Figure 1-Figure 11 A laser detection device comprises a detection platform 1 and a laser rangefinder 2, a suspension arm 3 is arranged on the detection platform 1, a flip mechanism 4 is arranged on the suspension arm 3, and a lens cleaning mechanism 5 is arranged in the suspension arm 3; The upper end of the test bench 1 is provided with a conveyor belt 101, a display screen 102, a controller host 103 and an alarm light 104. The boom 3 is located above the conveyor belt 101. The air compressor 504, the motor 403, and the submersible pump 502 are electrically connected to the controller host 103, and the operation of each device is controlled by the controller host 103. The flipping mechanism 4 includes a flap 401, a motor 403, a worm gear 404 and a worm 405. A detection window 301 corresponding to the flap 401 is provided on the boom 3. The motor 403 is fixedly installed in the boom 3. A shaft seat 402 is provided on the top lower end surface of the boom 3. A fixedly connected rotating shaft 4021 is provided on the side of the flap 401. The rotating shaft 4021 passes through the shaft seat 402 and is rotatably connected thereto. The worm 405 is fixedly installed on the output shaft of the motor 403. The worm gear 404 is fixedly installed on the rotating shaft 4021. The motor 403 and the rotating shaft 4021 are transmission-connected through the worm gear 404 and the worm 405. A mounting platform 4011 is provided on the side of the flap 401, and the laser rangefinder 2 is fixedly installed on the mounting platform 4011.

[0021] Furthermore, the lens cleaning mechanism 5 includes a cleaning table 503, a cleaning tank 5031 is provided on the cleaning table 503, an air flow channel 5032 and a cleaning liquid nozzle 5035 are provided in the cleaning tank 5031, a lifting air pipe 505, a rotating air pipe 506 and a wiping ball head 507 are provided in the air flow channel 5032, the cleaning table 503 is fixedly installed at the bottom of the boom 3, the lifting air pipe 505 is inserted into the air flow channel 5032 and is slidably connected to it, the rotating air pipe 506 is inserted into the lifting air pipe 505 and is rotatably connected to it, and the wiping ball head 507 is fixedly installed on the rotating air pipe 506.

[0022] The lens is cleaned by spraying cleaning liquid through the cleaning liquid nozzle 5035. When the airflow of the air compressor 504 enters the airflow channel 5032, the lifting air pipe 505 is lifted upward by the airflow, so that the wiping ball head 507 can contact the lens of the laser rangefinder 2, and the wiping ball head 507 is squeezed into a flat shape. Then, the rotating air pipe 506 drives the wiping ball head 507 to rotate under the action of the airflow to wipe the lens.

[0023] Furthermore, a cleaning liquid storage tank 501 is provided in the boom 3, a submersible pump 502 is provided in the cleaning liquid storage tank 501, a water outlet of the submersible pump 502 is connected to the cleaning liquid nozzle 5035, a drain outlet 5033 is provided at the bottom of the cleaning tank 5031, and a waste liquid pipe is provided at the bottom of the drain outlet 5033.

[0024] The cleaning liquid in the cleaning liquid storage tank 501 is pumped to the cleaning liquid nozzle 5035 through the submersible pump 502 to spray and clean the surface of the laser rangefinder 2 lens. After cleaning the lens, the cleaning liquid mixed with dust is discharged through the drain port 5033 and guided to the recovery equipment for recovery through the waste liquid pipe.

[0025] Furthermore, a slide groove 5036 is provided in the air flow channel 5032, a first flange 5054 cooperating with the slide groove 5036 is provided on the side of the lifting air pipe 505, a second flange 5051 and a third flange 5055 are provided on the inner end surface of the lifting air pipe 505, a steel ball 5053 and a spring 5052 are provided between the second flange 5051 and the third flange 5055, the steel ball 5053 is elastically connected to the second flange 5051 by the spring 5052, and the third flange 5055 is a conical cylindrical structure.

[0026] The steel ball 5053 blocks the top of the lifting air pipe 505 under the action of the spring 5052. When the air pressure in the air flow channel 5032 increases, the lifting air pipe 505 first slides upward under the action of the air pressure. When the first flange 5054 is stuck on the edge of the slide groove 5036, the steel ball 5053 squeezes the spring 5052 to slide upward under the action of the air pressure, so that the top and bottom of the lifting air pipe 505 are connected, and the airflow enters the rotating air pipe 506.

[0027] Furthermore, the inner end surface of the rotating air pipe 506 is provided with spiral blades 5063 in an equidistant circular array, the top of the rotating air pipe 506 is provided with a central air pipe 5061 and offset air holes 5062, the wiping ball head 507 is installed on the central air pipe 5061, and the offset air holes 5062 are arranged in an equidistant circular array around the central air pipe 5061.

[0028] When the air flow passes through the rotating air tube 506, the spiral fan blades 5063 drive the rotating air tube 506 to rotate under the action of the air flow, thereby driving the wiping ball head 507 to wipe the lens. At the same time, the air flow passes through the offset air hole 5062 to blow air to the lens, accelerating the drying of the lens. The central air hole passes through the wiping ball head 507 to accelerate the drying of the cleaning liquid attached to the wiping ball head 507. At the same time, under the action of centrifugal force and the squeezing of the lens, the drying speed of the wiping ball head 507 is further accelerated, further improving the lens cleaning effect.

[0029] Furthermore, the wiping ball head 507 is made of sponge material, and a microfiber layer 5071 is provided on the surface of the wiping ball head 507 .

[0030] The sponge-made wiping ball head 507 has excellent elasticity and air permeability, so that the wiping ball head 507 can fully fit with the lens when squeezed without damaging the lens. At the same time, the good air permeability allows the gas ejected from the central air pipe 5061 to pass through the wiping ball head 507 and take away the moisture absorbed in the wiping ball head 507. Ultrafine fiber is the raw material of the lens wiping cloth and will not damage the lens.

[0031] Furthermore, a detection lens 201 is provided at the bottom of the laser rangefinder 2 , a fourth flange 202 is provided at the edge of the detection lens 201 , and a sealing ring 5034 matched with the fourth flange 202 is provided at the edge of the cleaning groove 5031 .

[0032] When the detection lens 201 is received in the boom 3, the fourth flange 202 squeezes the sealing ring 5034 to form a closed space between the cleaning groove 5031 and the detection lens 201, thereby preventing the cleaning liquid from splashing during the lens cleaning process, improving the cleaning effect, and preventing internal circuit short circuit.

[0033] Furthermore, an air compressor 504 is disposed on the side of the testing platform 1 , and an air outlet of the air compressor 504 is connected to the air flow channel 5032 .

[0034] Furthermore, the number of laser rangefinders 2 is one to three, the laser rangefinders 2 are arrayed equidistantly on the mounting platform 4011 , and the number of cleaning mechanisms is equal to the number of laser rangefinders 2 .

[0035] The thickness of the plastic workpiece is measured by multiple sets of laser rangefinders 2, thereby improving the measurement accuracy and more accurately calculating the flatness of the plastic plate. Multiple sets of cleaning mechanisms ensure that the lenses of each set of laser rangefinders 2 can be cleaned at the same time.

[0036] See also Figure 1-Figure 11 , a laser detection method, comprising the following steps: Step 1: Preparation: Turn on the power of the test bench 1, ensure that all devices are in standby mode, initialize the system through the controller host 103, and set various parameters; Step 2, during the inspection process, the motor 403 drives the worm gear 404 and the worm 405 mechanism, and adjusts the angle of the flap 401 so that the laser rangefinder 2 is aligned with the upper end surface of the conveyor belt 101. The plate to be inspected is placed on the conveyor belt 101. The plate moves to the bottom of the boom 3 along with the conveyor belt 101, and the laser rangefinder 2 starts to work. The thickness and flatness data of the plate are calculated based on the change of the distance measurement data. The measurement results are displayed in real time on the display screen 102 of the inspection table 1. It is judged whether the plate meets the requirements according to the set standards. If it fails to meet the requirements, the alarm light 104 is triggered to alarm. Step 3, finish the work. After the measurement is finished, the motor 403 is started by the controller host 103, so that the flip mechanism 4 drives the laser rangefinder 2 to be stored in the boom 3.

[0037] Step 4, lens cleaning, the controller host 103 sends instructions to the submersible pump 502 and the air compressor 504, starts the submersible pump 502 to pump the cleaning liquid from the cleaning liquid storage tank 501 to the cleaning liquid nozzle 5035, the cleaning liquid nozzle 5035 sprays the cleaning liquid to rinse the lens surface of the laser rangefinder 2, remove the dust and stains on the lens, then, the air compressor 504 generates compressed air and sends it into the air flow channel 5032, pushing the lifting air pipe 505 to move upward until the wiping ball head 507 contacts the lens surface fully, and when the air flow flows at a high speed, it pushes the rotating air pipe 506 to rotate, driving the wiping ball The head 507 rotates to carefully wipe the lens surface, and the air flow passes through the offset air hole 5062 on the rotating air pipe 506 and blows directly to the lens, accelerating the drying process of the lens surface. After cleaning, the waste liquid is discharged through the drain port 5033 at the bottom of the cleaning tank 5031 through the waste liquid pipe for subsequent treatment or recycling. After cleaning and drying, the controller host 103 stops the operation of the air compressor 504 and the submersible pump 502, and the lifting air pipe 505 is reset under its own gravity and the inertia of the steel ball 5053 and the spring 5052, the rotating air pipe 506 stops rotating, and the entire lens cleaning mechanism 5 is reset.

[0038] The above are only preferred embodiments of the present invention and are not intended to limit the present invention. Any modifications, equivalent substitutions and improvements made within the spirit and principles of the present invention should be included in the protection scope of the present invention.

Claims

1. A laser detection device, comprising a detection platform (1) and a laser rangefinder (2), characterized in that: A suspension arm (3) is arranged on the detection platform (1), a turning mechanism (4) is arranged on the suspension arm (3), and a lens cleaning mechanism (5) is arranged inside the suspension arm (3); A conveyor belt (101), a display screen (102), a controller host (103) and an alarm light (104) are arranged at the upper end of the detection platform (1), and the suspension arm (3) is located above the conveyor belt (101); The flip mechanism (4) comprises a flip cover (401), a motor (403), a worm gear (404) and a worm (405); the arm (3) is provided with a detection window (301) corresponding to the flip cover (401); the motor (403) is fixedly installed in the arm (3); a shaft seat (402) is provided on the top lower end surface of the arm (3); a rotating shaft (4021) is fixedly connected to the side of the flip cover (401); the rotating shaft (4021) The worm (405) is fixedly mounted on the output shaft of the motor (403), the worm wheel (404) is fixedly mounted on the rotating shaft (4021), the motor (403) and the rotating shaft (4021) are connected in transmission through the worm wheel (404) and the worm (405), a mounting platform (4011) is provided on the side of the flip cover (401), and the laser rangefinder (2) is fixedly mounted on the mounting platform (4011).

2. A laser detection device as claimed in claim 1, characterized in that: The lens cleaning mechanism (5) comprises a cleaning table (503), a cleaning tank (5031) provided on the cleaning table (503), an air flow channel (5032) and a cleaning liquid nozzle (5035) provided in the cleaning tank (5031), a lifting air pipe (505), a rotating air pipe (506) and a wiping ball head (507) provided in the air flow channel (5032), the cleaning table (503) is fixedly mounted on the bottom of the suspension arm (3), the lifting air pipe (505) is inserted into the air flow channel (5032) and is slidably connected thereto, the rotating air pipe (506) is inserted into the lifting air pipe (505) and is rotatably connected thereto, and the wiping ball head (507) is fixedly mounted on the rotating air pipe (506).

3. A laser detection device as claimed in claim 2, characterized in that: A cleaning liquid storage tank (501) is arranged in the boom (3), a submersible pump (502) is arranged in the cleaning liquid storage tank (501), a water outlet of the submersible pump (502) is connected to a cleaning liquid nozzle (5035), a drain outlet (5033) is arranged at the bottom of the cleaning tank (5031), and a waste liquid pipe is arranged at the bottom of the drain outlet (5033).

4. A laser detection device as claimed in claim 2, characterized in that: A slide groove (5036) is arranged in the air flow channel (5032); a first flange (5054) cooperating with the slide groove (5036) is arranged on the side of the lifting air pipe (505); a second flange (5051) and a third flange (5055) are arranged on the inner end surface of the lifting air pipe (505); a steel ball (5053) and a spring (5052) are arranged between the second flange (5051) and the third flange (5055); and the steel ball (5053) is elastically connected to the second flange (5051) via the spring (5052).

5. A laser detection device as claimed in claim 2, characterized in that: The inner end surface of the rotating air pipe (506) is provided with spiral blades (5063) in an equidistant circular array, the top of the rotating air pipe (506) is provided with a central air pipe (5061) and offset air holes (5062), and the wiping ball head (507) is mounted on the central air pipe (5061).

6. A laser detection device as claimed in claim 2, characterized in that: The wiping ball head (507) is made of a sponge material, and a superfine fiber layer (5071) is provided on the surface of the wiping ball head (507).

7. A laser detection device as claimed in claim 2, characterized in that: An air compressor (504) is arranged on the side of the testing platform (1), and an air outlet of the air compressor (504) is connected to the air flow channel (5032).

8. A laser detection device as claimed in claim 1, characterized in that: The number of the laser rangefinders (2) is one to three, the laser rangefinders (2) are arranged in an equidistant array on the mounting platform (4011), and the number of the cleaning mechanisms is equal to the number of the laser rangefinders (2).

9. A laser detection method, applicable to a laser detection device as claimed in any one of claims 1 to 8, characterized in that: The following steps are involved: Step 1: Preparation: Turn on the power of the test bench (1), ensure that all devices are in standby mode, initialize the system through the controller host (103), and set various parameters; Step 2, during the inspection process, the motor (403) drives the worm gear (404) and the worm (405) mechanism to adjust the angle of the flap (401) so that the laser rangefinder (2) is aligned with the upper end surface of the conveyor belt (101), and the plate to be inspected is placed on the conveyor belt (101). The plate moves along the conveyor belt (101) to the bottom of the boom (3), and the laser rangefinder (2) starts to work. The thickness and flatness data of the plate are calculated based on the change of the distance measurement data. The measurement results are displayed in real time on the display screen (102) of the inspection table (1). It is judged whether the plate meets the requirements according to the set standards. If it fails to meet the requirements, the alarm light (104) is triggered to alarm. Step 3, finishing the work. After the measurement is finished, the motor (403) is started by the controller host (103), so that the flip mechanism (4) drives the laser rangefinder (2) to be stored in the boom (3).

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