CN111648559B - Ground leveling device and leveling method thereof - Google Patents

Abstract

The invention discloses a ground leveling device and a leveling method thereof, relates to the technical field of ground leveling, and aims to solve the problems that the existing ground leveling is time-consuming and labor-consuming, the measurement error range is large, and a certain standard cannot be achieved. Main body frame's below is provided with the support sleeve, and the support sleeve is provided with four, four the support sleeve all passes through movable rod and main body frame fixed connection, main body frame's inner wall is provided with the slide rail, main body frame's inside is provided with the movable plate, and movable plate and slide rail sliding connection, the inside of movable plate is provided with the pivot, and the pivot passes through the bearing with main body frame to be connected, the one end of pivot extends to main body frame's outside and synchronizing wheel fixed connection, inverter motor is installed to one side of main body frame top, be provided with the action wheel on inverter motor's the output, the action wheel passes through the belt and is connected with the synchronizing wheel transmission, the inside of movable plate is provided with the shifting chute.

Description

Ground leveling device and leveling method thereof

Technical Field

The invention relates to the technical field of ground leveling, in particular to a ground leveling device and a leveling method thereof.

Background

The ground leveling means that the original ground of a building is leveled by a certain method, so that the ground flatness reaches a certain standard and meets the national ground leveling regulations. The ground leveling can be divided into two types, namely the original cement mortar ground leveling and the widely applied self-leveling cement leveling. The former is made level and is used ordinary cement mortar, and it has great defect to make level, and firstly, the roughness control can not accomplish the biggest accuracy, and the thickness of making level is high, and secondly, construction process leads to house ground to increase owing to the technical problem of construction side easily a lot. The latter is self-leveling ground leveling, which adopts high-polymerization self-leveling cement to perform ground treatment, has many advantages, can level the thinnest ground to 3 mm, and has good thickness controllability, high ground strength and much higher flatness than cement mortar. Can be used for leveling the house decoration ground. The ground surface treatment of various stadiums, hotels, office places, precise electronic workshops and the like has high ground surface leveling requirements. The leveling of the floor before paving the wood floor in home decoration is also suitable for self-leveling floor leveling.

The existing ground leveling is time-consuming and labor-consuming, and the measurement error range is large, so that the ground leveling cannot reach a certain standard; therefore, the prior need is not met, and a ground leveling device and a leveling method thereof are provided.

Disclosure of Invention

The invention aims to provide a ground leveling device and a leveling method thereof, and aims to solve the problems that the prior ground leveling in the background art is time-consuming and labor-consuming, has a large measurement error range and cannot reach a certain standard.

In order to achieve the purpose, the invention provides the following technical scheme: a ground leveling device comprises a main body frame, wherein a supporting sleeve is arranged below the main body frame, the supporting sleeve is fixedly connected with the main body frame through a movable rod, a slide rail is arranged on the inner wall of the main body frame, a movable plate is arranged inside the main body frame and is in sliding connection with the slide rail, a rotating shaft is arranged inside the movable plate and is connected with the main body frame through a bearing, one end of the rotating shaft extends to the outside of the main body frame and is fixedly connected with a synchronizing wheel, a variable frequency motor is installed on one side above the main body frame, a driving wheel is arranged at the output end of the variable frequency motor and is in transmission connection with the synchronizing wheel through a belt, a moving groove is arranged inside the movable plate, a moving wheel is arranged below the movable plate, a supporting rod is arranged on the upper surface of the moving wheel, a workbench is arranged above the supporting table, an angle measuring mechanism is arranged above the workbench, a hook is arranged on one side of the angle measuring mechanism, guide posts are arranged in the moving grooves, the guide posts are connected with the moving grooves in a sliding manner through moving plates, one ends of the guide posts extend into the supporting table and are fixedly connected with limiting plates, a positioning post is arranged on one side of the moving wheel, a threaded rod is arranged above the positioning post, a laser level meter is arranged above the threaded rod, nuts are arranged on the outer wall of the threaded rod and are in threaded connection with the threaded rod, an elastic marking line is arranged between the nuts, one end of the elastic marking line is fixedly connected with the threaded rod, the other end of the elastic marking line is fixedly connected with the hook, a fixed sleeve is arranged below the positioning post, and a fixed seat is arranged below the fixed sleeve, be provided with the snap ring on fixed sleeving's the outer wall, the one end of snap ring all is provided with the connecting rod, the one end of connecting rod is provided with fixed cover, and fixed cover and support sleeve fixed connection, be provided with first semicircle clamp on the snap ring, the one end of first semicircle clamp is provided with second semicircle clamp, and second semicircle clamp and first semicircle clamp rotate to be connected.

Preferably, the lower surfaces of the four support sleeves are provided with anti-skid pads.

Preferably, the workbench is fixedly connected with the support table through four support legs.

Preferably, the upper surface of the moving plate is provided with a handle.

Preferably, the limiting plate is fixedly connected with the supporting table through a compression spring.

Preferably, the fixed seat is fixedly connected with the fixed sleeve through a movable rod.

Preferably, the inner walls of the second semicircular hoop and the first semicircular hoop are provided with rubber pads.

Preferably, the other end of the first semicircular clamp is provided with a bolt.

Preferably, the movable rod is provided with a positioning pin.

A ground leveling method comprising the steps of:

step 1: the main body frame is moved to the ground to be leveled and is stably placed, the movable rod and the support sleeve are moved in the vertical direction according to the requirement, and the positioning pin is inserted into the positioning hole of the support sleeve to realize positioning when the height is adjusted to the required height;

step 2: fixing the positioning column with two support sleeves through a connecting rod at one end of a clamping ring and a fixing sleeve by the clamping ring, and then moving the fixing seat downwards to enable the moving rod to extend out of the fixing sleeve and be fixed by screws;

and step 3: tying one end of the elastic marking line on the threaded rod, fixing the threaded rod by using two nuts, and fixedly connecting the other end of the elastic marking line with the hook;

and 4, step 4: starting the variable frequency motor, so that the output end of the variable frequency motor drives the driving wheel to rotate, the driving wheel drives the synchronous wheel to rotate through the belt, the rotating shaft rotates inside the main body frame, and the movable plate is driven to longitudinally slide back and forth on the sliding rail;

and 5: the moving wheels move and level according to the movement of the moving plate, and when the moving plate stops moving, the guide columns in the moving grooves can also move transversely through the handles, so that the guide columns are accurately positioned;

step 6: when the moving wheel contacts the uneven ground, the guide post is in sliding connection with the through hole in the workbench, so that the moving wheel can drive the support rod, the support table and the workbench above the support table to move upwards when encountering the uneven ground, and a compression spring in the support table is extruded;

and 7: but threaded rod top is equipped with laser emitter radiation infrared laser, and infrared laser is the water flat line, and usable elasticity marking line and infrared laser calculate through the relation between spirit level and the angle measurement mechanism and obtain the protrusion height, later sprinkle on uneven ground, then will obtain the convex ground of result through calculating with the abrasive disc and carry out cutting process, guarantee that the error reduces within 2 millimeters.

Compared with the prior art, the invention has the beneficial effects that:

1. according to the invention, through the matching of the movable rod and the supporting sleeve, a worker can conveniently adjust the height of the main body frame according to requirements, the positioning column is fixed by utilizing the clamping ring, the connecting rod and the fixing sleeve, the fixing seat is moved downwards to enable the movable rod to extend out of the fixing sleeve and then fixed by utilizing the screw, the distance between the fixing seat and the ground is adjusted, the positioning column is positioned on the relatively flat ground, the laser emitter above the threaded rod is opened, and the infrared laser is released to be a horizontal line and used as a reference object for leveling.

2. Through starting inverter motor, make inverter motor's output drive action wheel rotatory, inverter motor makes the load move at rated speed within range, thereby make the action wheel drive synchronizing wheel through the belt and rotate, and then make the pivot rotate in main body frame's inside, and drive the movable plate and carry out vertical round trip to slide on the slide rail, thereby it makes level to remove the wheel according to the removal of movable plate to remove, when the movable plate stop moving, can also carry out lateral shifting with the guide post of moving inslot portion through the handle, accurate positioning, make and remove the wheel and can diversely make level.

3. Through the setting of elasticity marking line, usable elasticity marking line and infrared laser calculate through the relation between spirit level and the angle measuring mechanism and obtain the protrusion height, through make level the comprehensive calculation many times and obtain the ground watering uneven after the result, then cut with the abrasive disc with convex ground and roll the processing, guarantee that the error reduces within 2 millimeters, the device easy operation, the precision is high, has improved work efficiency simultaneously.

Drawings

FIG. 1 is a schematic view of the overall structure of the present invention;

FIG. 2 is a schematic top view of the present invention;

FIG. 3 is a schematic diagram of a moving plate structure according to the present invention;

FIG. 4 is a schematic view of the internal structure of the support table of the present invention;

FIG. 5 is a schematic view of a snap ring structure according to the present invention;

in the figure: 1. a main body frame; 2. a support sleeve; 3. a movable rod; 4. positioning pins; 5. a non-slip mat; 6. a slide rail; 7. a rotating shaft; 8. a synchronizing wheel; 9. a driving wheel; 10. a belt; 11. a variable frequency motor; 12. a first moving plate; 13. a moving groove; 14. a second moving plate; 15. a handle; 16. fixing a sleeve; 17. a snap ring; 1701. a first semi-circular clamp; 1702. a second semicircular hoop; 1703. a bolt; 1704. a rubber pad; 18. fixing the sleeve; 19. a travel bar; 20. a fixed seat; 21. a positioning column; 22. a threaded rod; 23. a nut; 24. elastic marking lines; 25. a connecting rod; 26. a moving wheel; 27. a support bar; 28. a support table; 29. a guide post; 30. a compression spring; 31. a level gauge; 32. an angle measuring mechanism; 33. hooking; 34. a work table; 35. a support leg; 36. and a limiting plate.

Detailed Description

The technical solutions in the embodiments of the present invention will be clearly and completely described below with reference to the drawings in the embodiments of the present invention, and it is obvious that the described embodiments are only a part of the embodiments of the present invention, and not all of the embodiments.

Referring to fig. 1-5, an embodiment of the present invention is shown: a ground leveling device comprises a main body frame 1, wherein four supporting sleeves 2 are arranged below the main body frame 1, the supporting sleeves 2 are arranged, the four supporting sleeves 2 are fixedly connected with the main body frame 1 through movable rods 3, a slide rail 6 is arranged on the inner wall of the main body frame 1, a first moving plate 12 is arranged inside the main body frame 1, the first moving plate 12 is in sliding connection with the slide rail 6, a rotating shaft 7 is arranged inside the first moving plate 12, the rotating shaft 7 is connected with the main body frame 1 through a bearing, one end of the rotating shaft 7 extends to the outside of the main body frame 1 and is fixedly connected with a synchronizing wheel 8, a variable frequency motor 11 is arranged on one side above the main body frame 1, the variable frequency motor 11 can enable a load to operate within a rated speed range, a driving wheel 9 is arranged on the output end of the variable frequency motor 11, and the driving wheel 9 is in transmission connection with the synchronizing wheel 8 through a belt 10, the interior of the first moving plate 12 is provided with two moving grooves 13, the moving grooves 13 are provided with two moving wheels 26, the lower portion of the first moving plate 12 is provided with two supporting rods 27, the upper surfaces of the moving wheels 26 are provided with two supporting rods 27, the upper portions of the two supporting rods 27 are both provided with a supporting table 28, the upper portion of the supporting table 28 is provided with a workbench 34, the upper portion of the workbench 34 is provided with an angle measuring mechanism 32, one side of the angle measuring mechanism 32 is provided with a hook 33, the interior of the two moving grooves 13 is provided with a guide post 29, the guide post 29 plays a guiding role, the guide post 29 is connected with the moving grooves 13 in a sliding mode through the second moving plate 14, one end of the guide post 29 extends to the interior of the supporting table 28 and is fixedly connected with a limiting plate 36, one side of the moving wheels 26 is provided with a positioning post 21, the upper portion of the positioning post 21 is provided with a threaded rod 22, the upper portion of the threaded rod 22 is provided with a laser level 31, the outer wall of the threaded rod 22 is provided with two nuts 23, the two nuts 23 are both in threaded connection with the threaded rod 22, an elastic marking line 24 is arranged between the two nuts 23, one end of the elastic marking line 24 is fixedly connected with the threaded rod 22, the other end of the elastic marking line 24 is fixedly connected with the hook 33, a fixed sleeve 18 is arranged below the positioning column 21, a fixed seat 20 is arranged below the fixed sleeve 18, the outer wall of the fixed sleeve 18 is provided with two snap rings 17, one ends of the two snap rings 17 are both provided with a connecting rod 25, one end of the connecting rod 25 is provided with a fixed sleeve 16, the fixed sleeve 16 is fixedly connected with the support sleeve 2, the snap ring 17 is provided with a first semicircular clamp 1701, one end of the first semicircular clamp 1701 is provided with a second semicircular clamp 1702, and the second semicircular clamp 1702 is rotatably connected with the first semicircular clamp 1701, the positioning column 21 is convenient to mount and dismount.

Further, the lower surfaces of the four support sleeves 2 are provided with anti-slip pads 5, the anti-slip pads 5 can increase friction force, an anti-slip effect is achieved, and the main body frame 1 can be placed stably.

Further, the working table 34 is fixedly connected to the supporting table 28 through four supporting legs 35, and the supporting legs 35 serve as stable supports.

Further, the handle 15 is disposed on the upper surface of the second moving plate 14, and the handle 15 is used for moving the guide post 29 inside the moving groove 13 in the transverse direction, so as to achieve precise positioning.

Further, the stopper plate 36 is fixedly connected to the support table 28 via the compression spring 30, and the compression spring 30 deforms under the action of external force by its compression elasticity, and returns to its original shape after the external force is removed.

Further, the fixed seat 20 is fixedly connected with the fixed sleeve 18 through the movable rod 19, and the movable rod 19 can extend and retract inside the fixed sleeve 18 to adjust the distance between the fixed seat 20 and the ground.

Further, the inner walls of the second semicircular hoop 1702 and the first semicircular hoop 1701 are provided with rubber pads 1704, the rubber pads 1704 play a role in protecting the fixing sleeve 18, and the rubber pads 1704 have large friction force and are anti-skidding, so that displacement cannot easily occur, and leveling is affected.

Further, the other end of first semicircle clamp 1701 is provided with bolt 1703, and through cooperating bolt 1703 with the inside jack of second semicircle clamp 1702, has played effectual fixed, and convenient to detach.

Furthermore, the movable rod 3 is provided with a positioning pin 4, and the positioning pin 4 is matched with a positioning hole in the support sleeve 2, so that a good positioning effect is achieved.

A ground leveling method comprising the steps of:

step 1: the main body frame 1 is moved to the ground to be leveled and is stably placed, the movable rod 3 and the support sleeve 2 are moved in the vertical direction according to the requirement, and the positioning pin 4 is inserted into the positioning hole of the support sleeve 2 to realize positioning when the height is adjusted to the required height;

step 2: fixing the positioning column 21 with two of the support sleeves 2 through the snap ring 17, the connecting rod 25 at one end of the snap ring 17 and the fixing sleeve 16, and then moving the fixing seat 20 downwards to enable the moving rod 19 to extend out of the fixing sleeve 18 and fixing the moving rod by using a screw;

and step 3: tying one end of an elastic marking line 24 on the threaded rod 22, fixing the elastic marking line by using two nuts 23, and fixedly connecting the other end of the elastic marking line 24 with a hook 33;

and 4, step 4: starting the variable frequency motor 11, so that the output end of the variable frequency motor 11 drives the driving wheel 9 to rotate, and the driving wheel 9 drives the synchronous wheel 8 to rotate through the belt 10, so that the rotating shaft 7 rotates inside the main body frame 1, and drives the first moving plate 12 to longitudinally slide back and forth on the sliding rail;

and 5: the moving wheel 26 performs moving leveling according to the movement of the first moving plate 12, and when the first moving plate 12 stops moving, the guide column 29 inside the moving groove 13 can also be moved transversely through the handle 15 for accurate positioning;

step 6: when the moving wheel 26 contacts the uneven ground, the guide column 29 is connected with the through hole in the workbench 34 in a sliding manner, so that the moving wheel 26 meets the uneven ground and drives the support rod 27, the support platform 28 and the workbench 34 above the support platform 28 to move upwards, and the compression spring 30 in the support platform 28 is extruded;

and 7: the laser level meter 31 arranged above the threaded rod 22 can be used for measuring whether the ground where the positioning column 21 is located is horizontal or not, when bubbles on the laser level meter 31 deviate from the center, three-dimensional horizontal adjustment is carried out, when the bubbles are completely in the center of the laser level meter 31, line casting can be carried out, a horizontal laser line can be displayed towards the angle measuring mechanism 32 at the moment, a vertical laser line can be displayed towards the ground at the same time, so that a cross line is formed, the two lines are in a vertical relation, if the vertical horizontal line direction is not parallel to the vertical direction of the positioning column 21, the horizontal position of the vertical laser line can be finely adjusted through a knob on the level meter, so that the positioning column 21 is ensured to be horizontal, and then the horizontal laser line is used as a reference line, and an included angle generated between the elastic marking line 24 and the horizontal laser line is calculated through the angle measuring mechanism 32;

horizontal angle calculation formula with horizontal angle value of 0-360 degrees

Horizontal angle beta is equal to target reading m-target reading n

In the formula:

m is the angle with the horizontal laser line as the datum line;

n is the number of included angles read out between the horizontal laser line direction and the elastic marking line 24 measured by the angle measuring mechanism 32;

according to the requirement of angle measurement precision, a plurality of measured returns can be measured to take the average value of the measured returns as the final result, then water is sprayed on the uneven ground, then the grinding disc is used for cutting the convex ground with the calculated result, and the error is ensured to be reduced within 2 mm.

It will be evident to those skilled in the art that the invention is not limited to the details of the foregoing illustrative embodiments, and that the present invention may be embodied in other specific forms without departing from the spirit or essential attributes thereof. The present embodiments are therefore to be considered in all respects as illustrative and not restrictive, the scope of the invention being indicated by the appended claims rather than by the foregoing description, and all changes which come within the meaning and range of equivalency of the claims are therefore intended to be embraced therein. Any reference sign in a claim should not be construed as limiting the claim concerned.

Claims (10)

1. A ground leveling device, includes main part frame (1), its characterized in that: the supporting device is characterized in that a supporting sleeve (2) is arranged below the main body frame (1), the supporting sleeve (2) is fixedly connected with the main body frame (1) through a movable rod (3), a slide rail (6) is arranged on the inner wall of the main body frame (1), a first movable plate (12) is arranged inside the main body frame (1), the first movable plate (12) is slidably connected with the slide rail (6), a rotating shaft (7) is arranged inside the first movable plate (12), the rotating shaft (7) is connected with the main body frame (1) through a bearing, one end of the rotating shaft (7) extends to the outside of the main body frame (1) and is fixedly connected with a synchronizing wheel (8), a variable frequency motor (11) is installed on one side above the main body frame (1), an active wheel (9) is arranged on the output end of the variable frequency motor (11), and the active wheel (9) is in transmission connection with the synchronizing wheel (8) through a belt (10), the inside of first movable plate (12) is provided with shifting chute (13), the below of first movable plate (12) is provided with removes wheel (26), the upper surface that removes wheel (26) is provided with bracing piece (27), the top of bracing piece (27) all is provided with brace table (28), the top of brace table (28) is provided with workstation (34), the top of workstation (34) is provided with angle measurement mechanism (32), one side of angle measurement mechanism (32) is provided with couple (33), the inside of shifting chute (13) all is provided with guide post (29), guide post (29) are through second movable plate (14) and shifting chute (13) sliding connection, the one end of guide post (29) extends to the inside and limiting plate (36) fixed connection of brace table (28), one side of removing wheel (26) is provided with reference column (21), the utility model discloses a laser positioning device, including reference column (21), be provided with threaded rod (22) above reference column (21), the top of threaded rod (22) is provided with laser level meter (31), be provided with nut (23) on the outer wall of threaded rod (22), nut (23) all with threaded rod (22) threaded connection, be provided with elasticity marking line (24) between nut (23), the one end and threaded rod (22) fixed connection of elasticity marking line (24), the other end and couple (33) fixed connection of elasticity marking line (24), the below of reference column (21) is provided with fixed sleeve pipe (18), the below of fixed sleeve pipe (18) is provided with fixing base (20), be provided with snap ring (17) on the outer wall of fixed sleeve pipe (18), the one end of snap ring (17) all is provided with connecting rod (25), the one end of connecting rod (25) is provided with fixed cover (16), and fixed cover (16) and support sleeve (2) fixed connection, be provided with first semicircle clamp (1701) on snap ring (17), the one end of first semicircle clamp (1701) is provided with second semicircle clamp (1702), and second semicircle clamp (1702) and first semicircle clamp (1701) rotate to be connected.

2. A ground leveling device as defined in claim 1 wherein: the lower surfaces of the four supporting sleeves (2) are provided with anti-skid pads (5).

3. A ground levelling apparatus as claimed in claim 1, wherein: the workbench (34) is fixedly connected with the support platform (28) through support legs (35), and four support legs (35) are arranged.

4. A ground leveling device as defined in claim 1 wherein: the upper surface of the second moving plate (14) is provided with a handle (15).

5. A ground leveling device as defined in claim 1 wherein: the limiting plate (36) is fixedly connected with the supporting platform (28) through a compression spring (30).

6. A ground leveling device as defined in claim 1 wherein: the fixed seat (20) is fixedly connected with the fixed sleeve (18) through a movable rod (19).

7. A ground leveling device as defined in claim 1 wherein: the inner walls of the second semicircular hoop (1702) and the first semicircular hoop (1701) are provided with rubber pads (1704).

8. A ground leveling device as defined in claim 1 wherein: the other end of first semicircle clamp (1701) is provided with bolt (1703).

9. A ground leveling device as defined in claim 1 wherein: the movable rod (3) is provided with a positioning pin (4).

10. A ground leveling method is characterized in that: the method comprises the following steps:

step 1: the main body frame (1) is moved to the ground to be leveled and is stably placed, the movable rod (3) and the support sleeve (2) are moved in the vertical direction according to the requirement, and the positioning pin (4) is inserted into the positioning hole of the support sleeve (2) to realize positioning when the height is adjusted to the required height;

step 2: fixing a positioning column (21) with two support sleeves (2) through a clamping ring (17), wherein the clamping ring (17) comprises a connecting rod (25) at one end of the clamping ring (17) and a fixing sleeve (16), and then moving a fixing seat (20) downwards to enable a moving rod (19) to extend out of a fixing sleeve (18) and then fixing the moving rod by using a screw;

and step 3: tying one end of the elastic marking line (24) to the threaded rod (22), fixing the end by using two nuts (23), and fixedly connecting the other end of the elastic marking line (24) with the hook (33);

and 4, step 4: starting the variable frequency motor (11), so that the output end of the variable frequency motor (11) drives the driving wheel (9) to rotate, the driving wheel (9) drives the synchronous wheel (8) to rotate through the belt (10), the rotating shaft (7) rotates in the main body frame (1), and the first moving plate (12) is driven to longitudinally slide back and forth on the sliding rail;

and 5: the moving wheel (26) performs moving leveling according to the movement of the first moving plate (12), and when the first moving plate (12) stops moving, the guide column (29) in the moving groove (13) can be moved transversely through the handle (15) for accurate positioning;

step 6: when the moving wheel (26) contacts the uneven ground, the guide column (29) is in sliding connection with the through hole in the workbench (34), so that the moving wheel (26) can drive the support rod (27), the support platform (28) and the workbench (34) above the support platform (28) to move upwards when encountering the uneven ground, and the compression spring (30) in the support platform (28) is extruded;

and 7: a laser level meter (31) arranged above the threaded rod (22) can be used for measuring whether the ground where the positioning column (21) is positioned is horizontal or not, when the air bubble on the laser level meter (31) deviates from the center, the three-dimensional level adjustment is carried out, when the air bubble is completely in the center of the laser level meter (31), can be projected, and a horizontal laser line is displayed towards the angle measuring mechanism (32), meanwhile, a vertical laser line is displayed towards the ground, so that a cross line is formed, the two lines are in a vertical relation, if the vertical horizontal line direction is not parallel to the vertical direction of the positioning column (21), the horizontal position of the vertical laser line can be finely adjusted through a knob on the level gauge, so that the level of the positioning column (21) is ensured, then, taking the horizontal laser line as a reference line, and calculating an included angle generated between the elastic marking line (24) and the horizontal laser line through an angle measuring mechanism (32);

horizontal angle calculation formula with horizontal angle value of 0-360 degrees

Horizontal angle beta is equal to target reading m-target reading n

In the formula:

m is the angle with the horizontal laser line as the datum line;

n is the number of included angles read out between the horizontal laser line direction and the elastic marking line (24) measured by the angle measuring mechanism (32);

according to the requirement of angle measurement precision, a plurality of measured returns can be measured to take the average value of the measured returns as the final result, then water is sprayed on the uneven ground, then the grinding disc is used for cutting the convex ground with the calculated result, and the error is ensured to be reduced within 2 mm.

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