阅读说明：本技术 一种弹性自适应楼板厚度检测装置及施工方法 (Elastic self-adaptive floor thickness detection device and construction method ) 是由 王天保 张旭 于 2021-09-03 设计创作，主要内容包括：本发明公开了一种弹性自适应楼板厚度检测装置及施工方法,包括主体件,主体件内开设有限位轨道槽,主体件的底部安装下限位件,主体件的底部安装有连接杆,连接杆的底端与下限位件相连接,连接杆上安装有竖向弹簧,竖向弹簧与连接杆均位于限位轨道槽内,竖向弹簧的下端与连接杆固定连接,竖向弹簧的上端安装有上限位件,楼板上开设有放线孔,上限位件与下限位件适于测量楼板放线孔的孔深；主体件上标刻有竖向量程,竖向量程适于对应上限位件的位置；主体件的上下均安装有角度检测件和长度测量件,角度检测件适于检测楼板上待测点的角度,长度测量件适于测量楼板上待测点的长度；本发明解决了现有技术检测方法不便,且成本过高的问题。(The invention discloses an elastic self-adaptive floor thickness detection device and a construction method, and the elastic self-adaptive floor thickness detection device comprises a main body piece, wherein a limiting track groove is formed in the main body piece, a lower limiting piece is arranged at the bottom of the main body piece, a connecting rod is arranged at the bottom of the main body piece, the bottom end of the connecting rod is connected with the lower limiting piece, a vertical spring is arranged on the connecting rod, the vertical spring and the connecting rod are both positioned in the limiting track groove, the lower end of the vertical spring is fixedly connected with the connecting rod, an upper limiting piece is arranged at the upper end of the vertical spring, a wire releasing hole is formed in a floor, and the upper limiting piece and the lower limiting piece are suitable for measuring the hole depth of the wire releasing hole of the floor; the main body piece is marked with a vertical measuring range, and the vertical measuring range is suitable for the position corresponding to the upper limiting piece; the upper part and the lower part of the main body part are respectively provided with an angle detection part and a length measurement part, the angle detection part is suitable for detecting the angle of a point to be measured on the floor slab, and the length measurement part is suitable for measuring the length of the point to be measured on the floor slab; the invention solves the problems of inconvenience and high cost of the detection method in the prior art.)

1. The utility model provides an elasticity self-adaptation floor thickness detection device which characterized in that: the device comprises a main body piece (1), wherein a limiting track groove (4) is formed in the main body piece (1), a lower limiting piece is installed at the bottom of the main body piece (1), a connecting rod (2) is installed at the bottom of the main body piece (1), the bottom end of the connecting rod (2) is connected with the lower limiting piece, a vertical spring (3) is installed on the connecting rod (2), the vertical spring (3) and the connecting rod (2) are both located in the limiting track groove (4), the lower end of the vertical spring (3) is fixedly connected with the connecting rod (2), an upper limiting piece is installed at the upper end of the vertical spring (3), a wire placing hole (5) is formed in the floor slab, and the upper limiting piece and the lower limiting piece are suitable for measuring the hole depth of the floor slab wire placing hole (5);

the main body piece (1) is marked with a vertical measuring range, and the vertical measuring range is suitable for the position corresponding to the upper limiting piece;

the angle detection piece and the length measurement piece are arranged on the upper portion and the lower portion of the main body piece (1), the angle detection piece is suitable for detecting the angle of a point to be measured on a floor slab, and the length measurement piece is suitable for measuring the length of the point to be measured on the floor slab.

2. The apparatus of claim 1, wherein: the utility model discloses a horizontal spring (7) of connecting rod, including main part spare (1), mounting bracket (6) are installed to main part spare (1) lower extreme fixed mounting, install horizontal spring (7) in mounting bracket (6), the one end and mounting bracket (6) inner wall fixed connection of horizontal spring (7), spacing piece under the other end of horizontal spring (7) is installed, spacing piece lateral motion under the bottom of connecting rod (2) is suitable for the extrusion.

3. The apparatus of claim 2, wherein: the lower limiting part comprises a pulley yoke (8), a pulley (9) is mounted on the pulley yoke (8), one side, opposite to the mounting frame (6), of the pulley yoke (8) is fixedly connected with a transverse spring (7), the pulley (9) rolls on the pulley yoke (8), and the main body part (1) is suitable for being attached to the pulley (9) and stretches into the main body part downwards along the hole wall of the pay-off hole (5);

one side of the pulley yoke (8) opposite to the mounting frame (6) is provided with an oblique angle, and the connecting rod (2) moves downwards and is suitable for abutting against the pulley yoke (8);

the pulley frame is characterized in that limiting blocks (10) are arranged on two sides of the pulley frame (8), the distance between the limiting blocks (10) is not smaller than the inner wall distance of the mounting frame (6), and the limiting blocks (10) are suitable for limiting the pulleys (9) to be located outside the mounting frame (6).

4. The apparatus of claim 1, wherein: go up spacing piece and include limiting plate (11), limiting plate (11) cup joint on main part spare (1) and the centre is located spacing track groove (4) in with vertical spring (3) fixed connection, connecting groove (12) have been seted up to one side of main part spare (1) back to spacing track groove (4), be suitable for on limiting plate (11) to set up the locating hole and fix in connecting groove (12) through construction bolt (13).

5. The apparatus of claim 4, wherein the apparatus comprises: the angle detection piece comprises an upper angle dial (14) and a lower angle dial (15), connectors are arranged at the upper end and the lower end of the main body piece (1) respectively, annular frames (16) are mounted on the two groups of connectors respectively, the annular frames (16) are suitable for mounting the upper angle dial (14) or the lower angle dial (15) respectively, tape measure frames (17) are mounted on the sides, back to the floor, of the two groups of annular frames (16), the tape measure frames (17) are fixedly connected with the annular frames (16), an opening end is formed in each tape measure frame (17), a tape measure (18) is arranged in each tape measure frame (17), a fixing column (19) is mounted at the extending end of each tape measure (18), the fixing columns (19) are fixedly connected with the tape measures (18), and the fixing columns (19) are suitable for being fixed at detection points.

6. The apparatus of claim 5, wherein: the fixed column (19) is provided with a vertical hole on one side opposite to the floor slab, a downward extending piece (20) is installed in the vertical hole, an external thread is formed in the upper end of the downward extending piece (20), an internal thread is formed in the vertical hole, the downward extending piece (20) is suitable for extending up and down in the vertical hole, a disc (21) is arranged at the bottom end of the downward extending piece (20), an adhesive layer (22) is arranged on one side of the disc (21) opposite to the floor slab, the adhesive layer (22) is detachably connected with the disc (21), the disc (21) is suitable for being fixed on the floor slab, an adjusting range is marked on the downward extending piece (20), and the adjusting range is suitable for displaying the moving distance of the downward extending piece (20) relative to the floor slab.

7. The apparatus of claim 6, wherein: the measuring tape (18) is provided with a median block (23), the median block (23) is installed on the measuring tape (18) in a sliding mode and slides on the measuring tape (18), a median line (24) is marked on the median block (23), a laser (25) is installed in the middle of the measuring tape frame (17), and the output end of the laser (25) is suitable for emitting laser to irradiate on the median line (24) to detect the levelness of the measuring tape (18).

8. A construction method of the elastic adaptive floor thickness detection device according to claim 7, characterized by comprising the following steps:

step one, cleaning holes

Cleaning the inner wall of the wire releasing hole (5) and removing chisels, polishing the inner wall of the wire releasing hole (5) to be in a smooth state, and ensuring that the wire releasing hole (5) is in a vertical state;

secondly, downwards pressing a limiting plate (11) downwards along the inner wall of the pay-off hole (5) by a pulley (9) on the main body piece (1), so that a pressed connecting rod (2) downwards presses a pulley frame (8), the pulley frame (8) clamps the lower end of the pay-off hole (5), the limiting plate (11) clamps the upper end of the pay-off hole (5), a bolt (13) on a connecting groove (12) is locked, clamping of the pay-off hole (5) is completed, and the hole depth of the actual pay-off hole (5) is obtained according to the vertical range;

step three, determining a detection point of an actual upper floor, rotating the main body piece (1) to the direction of the detection point, moving the fixing column (19) to the detection point, connecting the fixing column (19) with the tape measure frame (17) through the tape measure (18), and extending and fixing the bottom end of the fixing column (19) downwards on the floor to obtain an extending distance a of the actual upper floor fixing column (19);

step four, by sliding the middle position block (23), turning on a laser (25) to irradiate the middle position block (23), and adjusting a downward extending piece (20) below a fixed column (19) to ensure that an actual middle position line (24) is positioned on a ray of the laser (25);

recording the direction and the length of an actual detection point, and recording as a polar coordinate X;

step six, an operator goes to the lower end of the floor slab, is positioned at the lower end of the main body part (1) through an auxiliary tool, obtains a position point of the lower end of the floor slab where the actual detection point is positioned according to the polar coordinate X of the detection point, adjusts the corresponding lower side fixing column (19) through the lower end of the main body part (1), obtains the adjustment height of the actual lower side fixing column (19), and accordingly obtains the extension distance b of the lower side fixing column (19);

and step seven, measuring the distance from the actual two measuring tapes (18) to the pay-off hole (5), thereby calculating the floor height at the actual detection point.

Technical Field

The invention belongs to the field of building quality detection, and particularly relates to an elastic self-adaptive floor thickness detection device and a construction method.

Background

The main concrete structure slab is constructed after pouring, and the floor slab section size is checked and accepted according to GB50204-2015 'concrete structure engineering construction quality acceptance standard' after the formwork is removed, and the allowable deviation of the main structure floor slab appearance section size is related, and the specific allowable deviation parameter is (+ 8-5) mm. The control of the section size has important significance on the appearance quality of the concrete and the later-stage operation settlement aiming at the consumption of the concrete.

In traditional construction, a steel tape is usually used for measuring whether the section size of the cast-in-place floor slab exceeds the specification by utilizing the wire releasing hole of each floor slab, namely, the average value of detection data is obtained through multiple measurements. Above-mentioned in-process detects special instrument disappearance and leads to the testing personnel to need to do reference line location floor structure size through the fingertip, adds loaded down with trivial details procedure to the detection process. In the traditional construction, a rigid detection ruler is usually held by hands, a metal hook at a '0' groove part is extended to the bottom of a pay-off hole part, the cross section size of the pay-off hole is observed by naked eyes, and the thickness of the plate surface of a cast-in-place structure is counted to be used as the basis of later operation calculation, so that the detection tool lacks specificity in the whole detection process, the detection process of data is complicated, and the accuracy of the data is influenced by human factors;

secondly, the unwrapping wire hole is mostly single on the floor, if alone through getting core machine sample drilling, can destroy floor overall structure, and it is difficult that the later stage is repaired, adopts floor thickness detector to detect, and is with high costs again.

Disclosure of Invention

The technical problem to be solved by the invention is as follows: the problems of inconvenience and high cost of the detection method in the prior art are solved.

In order to solve the technical problems, the inventor obtains the technical scheme of the invention through practice and summary, and the invention discloses an elastic self-adaptive floor thickness detection device which comprises a main body piece, wherein a limiting track groove is formed in the main body piece, a lower limiting piece is installed at the bottom of the main body piece, a connecting rod is installed at the bottom of the main body piece, the bottom end of the connecting rod is connected with the lower limiting piece, a vertical spring is installed on the connecting rod, the vertical spring and the connecting rod are both positioned in the limiting track groove, the lower end of the vertical spring is fixedly connected with the connecting rod, an upper limiting piece is installed at the upper end of the vertical spring, a wire releasing hole is formed in a floor, and the upper limiting piece and the lower limiting piece are suitable for measuring the hole depth of the wire releasing hole of the floor;

the main body piece is marked with a vertical measuring range, and the vertical measuring range is suitable for the position corresponding to the upper limiting piece;

the angle detection piece and the length measurement piece are arranged on the upper portion and the lower portion of the main body piece, the angle detection piece is suitable for detecting the angle of a point to be measured on the floor slab, and the length measurement piece is suitable for measuring the length of the point to be measured on the floor slab.

Further, main part spare lower extreme fixed mounting has the mounting bracket, install horizontal spring in the mounting bracket, the one end and the mounting bracket inner wall fixed connection of horizontal spring, spacing piece under the other end of horizontal spring is installed, spacing piece lateral motion under the bottom of connecting rod is suitable for the extrusion and makes.

Further, the lower limiting part comprises a pulley frame, a pulley is mounted on the pulley frame, one side of the pulley frame, opposite to the mounting frame, is fixedly connected with the transverse spring, the pulley rolls on the pulley frame, and the main body part is suitable for being attached to the pulley and extending downwards along the wall of the pay-off hole;

an oblique angle is arranged on one side of the pulley frame, which is opposite to the mounting frame, and the connecting rod moves downwards and is suitable for abutting against the pulley frame;

the pulley yoke's both sides are provided with the stopper, and two sets of the interval of stopper is not less than the inner wall interval of mounting bracket, the stopper is suitable for the restriction pulley to be located outside the mounting bracket.

Further, go up spacing piece including the limiting plate, the limiting plate cup joints on the main part piece and the centre is located spacing track inslot and vertical spring fixed connection, the spread groove has been seted up to one side of main part piece back to spacing track groove, be suitable for on the limiting plate to set up the locating hole and fix in the spread groove through construction bolt.

Furthermore, the angle detection piece comprises an upper angle dial and a lower angle dial, connectors are respectively arranged at the upper end and the lower end of the main body piece, annular frames are respectively mounted on the two groups of connectors, the annular frames are suitable for being respectively mounted with the upper angle dial or the lower angle dial, tape measure frames are mounted on one sides of the two groups of annular frames back to the floor, the tape measure frames are fixedly connected with the annular frames, open ends are formed in the tape measure frames, tape measures are arranged in the tape measure frames, fixing columns are mounted at the extending ends of the tape measures and are fixedly connected with the tape measures, and the fixing columns are suitable for being fixed at detection points.

Furthermore, a vertical hole is formed in one side, opposite to the floor, of the fixed column, a downward extending piece is installed in the vertical hole, an external thread is formed in the upper end of the downward extending piece, an internal thread is formed in the vertical hole, the downward extending piece is suitable for stretching up and down in the vertical hole, a disc is arranged at the bottom end of the downward extending piece, an adhesive layer is arranged on one side, opposite to the floor, of the disc, the adhesive layer is detachably connected with the disc, the disc is suitable for being fixed on the floor, an adjusting range is marked on the downward extending piece, and the adjusting range is suitable for displaying the moving distance of the downward extending piece, opposite to the floor.

Furthermore, a neutral block is arranged on the tape measure, the neutral block is slidably mounted on the tape measure and slides on the tape measure, a neutral line is marked on the neutral block, a laser is mounted in the middle of the tape measure frame, and the output end of the laser is suitable for emitting laser to irradiate the neutral line to detect the levelness of the tape measure.

A construction method of an elastic self-adaptive floor thickness detection device comprises the following steps:

step one, cleaning holes

Cleaning and chiseling the inner wall of the pay-off hole, polishing the inner wall of the pay-off hole to be in a smooth state, and ensuring that the pay-off hole is in a vertical state;

secondly, downwards pressing a limiting plate along the inner wall of the pay-off hole by a pulley on the main body part, so that a pressed connecting rod downwards presses a pulley yoke, the pulley yoke clamps the lower end of the pay-off hole, the limiting plate clamps the upper end of the pay-off hole, a bolt on a connecting groove is locked, the pay-off hole is clamped, and the hole depth of an actual pay-off hole is obtained according to a vertical range;

determining a detection point of an actual upper layer of the floor slab, rotating the main body part to the direction of the detection point, moving the fixed column to the detection point, connecting the fixed column with the tape measure frame through the tape measure, and extending and fixing the bottom end of the fixed column downwards on the floor slab to obtain an extending distance a of the actual upper layer fixed column;

step four, opening a laser irradiation middle position block by sliding a middle position block, and adjusting a downward extending piece below a fixed column to ensure that an actual middle position line is positioned on a ray of the laser;

recording the direction and the length of an actual detection point, and recording as a polar coordinate X;

step six, an operator goes to the lower end of the floor slab, is positioned at the lower end of the main body part through an auxiliary tool, obtains a position point of the lower end of the floor slab where the actual detection point is positioned according to the polar coordinate X of the detection point, adjusts the corresponding lower side fixing column through the lower end of the main body part, obtains the adjustment height of the actual lower side fixing column, and accordingly obtains the extension distance b of the lower side fixing column;

and step seven, measuring the distances from the actual two measuring tapes to the wire releasing hole, thereby calculating the floor height at the actual detection point.

Compared with the prior art, the invention can obtain the following technical effects:

firstly, aiming at the problem that the conventional manual tape measure has large measurement error, the distance between the two parallel tapes is finely adjusted by limiting the fixing columns on the two parallel tapes, and the distance required to be adjusted on the actual surface can be intuitively obtained by measuring the depth of the fixing wire releasing hole;

secondly, different from the existing floor thickness detector, firstly, the invention has simple structure and low cost; secondly, two persons do not need to work on the upper surface and the lower surface of the floor slab simultaneously to measure the distance, the invention is fixed on the connecting grooves through the limiting plates to realize fixation, the hole depth of an actual wire releasing hole is obtained through the vertical measuring range on the limiting plates, and then the actual downward extending piece moves downwards to the surface of the floor slab to ensure that the middle line is enough, the upper angle scale and the lower angle scale are suitable for recording the actual angle direction, the actual polar coordinates are obtained after the distance is added, the upper polar coordinates and the lower polar coordinates are consistent, the upper position and the lower position of a detection point on the floor slab can be obtained, the levelness is ensured after the middle line is ensured, and the actual data of the upper surface and the lower surface of the actual floor slab can also be obtained.

Drawings

In order to more clearly illustrate the embodiments or technical solutions in the prior art of the present invention, the drawings used in the description of the embodiments or prior art will be briefly described below, and it is obvious for those skilled in the art that other drawings can be obtained based on these drawings without creative efforts.

FIG. 1 is a schematic representation of the working cross-section of the apparatus of the present invention;

FIG. 2 is an enlarged view of portion A of FIG. 1;

FIG. 3 is an enlarged view of portion B of FIG. 1;

FIG. 4 is an enlarged view of section C of FIG. 1;

FIG. 5 is a schematic view of the structure of the main body part of the device;

FIG. 6 is a view of the apparatus mount structure;

fig. 7 is a schematic view of the working structure of the tape measure holder.

In the figure: 1. a main body member; 2. a connecting rod; 3. a vertical spring; 4. limiting the track groove; 5. a wire releasing hole; 6. a mounting frame; 7. a lateral spring; 8. a pulley yoke; 9. a pulley; 10. a limiting block; 11. a limiting plate; 12. connecting grooves; 13. a bolt; 14. an upper corner dial; 15. a lower angle dial; 16. an annular frame; 17. a tape measure frame; 18. a tape measure; 19. fixing a column; 20. a downward extending member; 21. a disc; 22. an adhesive layer; 23. a median block; 24. a median line; 25. a laser.

Detailed Description

In order to make the objects, technical solutions and advantages of the present invention more apparent, the present invention is further described in detail with reference to the following embodiments. It should be understood that the specific embodiments described herein are merely illustrative of the invention and are not intended to limit the invention.

The application of the principles of the present invention will be further described with reference to the accompanying drawings and specific embodiments.

Example 1

As shown in fig. 1, an embodiment of the invention is an elastic self-adaptive floor thickness detection device, which comprises a main body member 1, wherein a limiting track groove 4 is formed in the main body member 1, a lower limiting member is installed at the bottom of the main body member 1, a connecting rod 2 is installed at the bottom of the main body member 1, the bottom end of the connecting rod 2 is connected with the lower limiting member, a vertical spring 3 is installed on the connecting rod 2, the vertical spring 3 and the connecting rod 2 are both located in the limiting track groove 4, the lower end of the vertical spring 3 is fixedly connected with the connecting rod 2, an upper limiting member is installed at the upper end of the vertical spring 3, a wire releasing hole 5 is formed in a floor, and the upper limiting member and the lower limiting member are suitable for measuring the hole depth of the floor wire releasing hole 5;

the main body piece 1 is marked with a vertical measuring range, and the vertical measuring range is suitable for the position corresponding to the upper limiting piece;

the upper part and the lower part of the main body part 1 are provided with an angle detection part and a length measurement part, the angle detection part is suitable for detecting the angle of a point to be measured on a floor slab, and the length measurement part is suitable for measuring the length of the point to be measured on the floor slab.

1 lower extreme fixed mounting of main part spare has mounting bracket 6, installs horizontal spring 7 in the mounting bracket 6, and the one end and the 6 inner wall fixed connection of mounting bracket of horizontal spring 7, spacing piece under the other end of horizontal spring 7 is installed, and spacing piece lateral motion under the bottom of connecting rod 2 is suitable for the extrusion and makes.

In order to stably and conveniently slide into the pay-off hole 5, the lower limiting part comprises a pulley yoke 8, a pulley 9 is arranged on the pulley yoke 8, one side of the pulley yoke 8, which is opposite to the mounting frame 6, is fixedly connected with a transverse spring 7, the pulley 9 rolls on the pulley yoke 8, and the main body part 1 is suitable for being attached to and downwards extending into the pay-off hole 5 along the hole wall through the pulley 9;

one side of the pulley frame 8, which is opposite to the mounting frame 6, is provided with an oblique angle, the connecting rod 2 moves downwards and is suitable for abutting against the pulley frame 8, the connecting rod 2 is inserted into the mounting frame 6 along the oblique angle, the transverse spring 7 extends to extend the pulley frame 8, and the rear vertical spring 3 returns the position of the connecting rod 2 on the mounting frame 6 upwards;

the both sides of pulley yoke 8 are provided with stopper 10, and the interval of two sets of stoppers 10 is not less than the inner wall interval of mounting bracket 6, and stopper 10 makes carriage 8 can not block completely in the mounting bracket 6, guarantees that actual carriage 8 stretches out the effect, and stopper 10 is suitable for and restricts pulley 9 and is located outside mounting bracket 6.

Go up spacing piece including limiting plate 11, limiting plate 11 cup joints on main part 1 and the centre is located spacing track groove 4 in with 3 fixed connection of vertical spring, and connecting groove 12 has been seted up to one side of main part 1 back to spacing track groove 4, is suitable for on the limiting plate 11 to set up the locating hole and fixes in connecting groove 12 through construction bolt 13, and limiting plate 11 guarantees actually to install in unwrapping wire hole 5.

The angle detection piece comprises an upper angle dial 14 and a lower angle dial 15, connectors are respectively arranged at the upper end and the lower end of the main body piece 1, annular frames 16 are respectively arranged on the two groups of connectors, the annular frames 16 are suitable for being respectively provided with the upper angle dial 14 or the lower angle dial 15, tape measure frames 17 are respectively arranged on one sides of the two groups of annular frames 16 back to the floor, the tape measure frames 17 are fixedly connected with the annular frames 16, open ends are formed in the tape measure frames 17, tape measures 18 are arranged in the tape measure frames 17, fixing columns 19 are arranged at the extending ends of the tape measures 18, the fixing columns 19 are fixedly connected with the tape measures 18, and the fixing columns 19 are suitable for being fixed at detection points.

The fixed column 19 is provided with a vertical hole opposite to one side of the floor slab, a downward extending piece 20 is installed in the vertical hole, the upper end of the downward extending piece 20 is provided with an external thread, an internal thread is formed in the vertical hole, the downward extending piece 20 is suitable for extending up and down in the vertical hole, the bottom end of the downward extending piece 20 is provided with a disc 21, one side of the disc 21 opposite to the floor slab is provided with an adhesive layer 22, the adhesive layer 22 is detachably connected with the disc 21, the adhesive layer 22 is suitable for fixing the disc 21 on the floor slab, an adjusting range is marked on the downward extending piece 20, and the adjusting range is suitable for displaying the moving distance of the downward extending piece 20 opposite to the floor slab.

The measuring tape 18 is provided with a median block 23, the median block 23 is slidably mounted on the measuring tape 18 and slides on the measuring tape 18, a median line 24 is marked on the median block 23, a laser 25 is mounted in the middle of the measuring tape frame 17, and the output end of the laser 25 is suitable for emitting laser to irradiate on the median line 24 to detect the levelness of the measuring tape 18.

A construction method of an elastic self-adaptive floor thickness detection device comprises the following steps:

step one, cleaning holes

Cleaning the inner wall of the wire releasing hole 5, removing chisels, polishing the inner wall of the wire releasing hole 5 to be in a smooth state, and ensuring that the wire releasing hole 5 is in a vertical state;

secondly, downwards pressing a limiting plate 11 downwards along the inner wall of the pay-off hole 5 by a pulley 9 on the main body part 1, so that a pressed connecting rod 2 downwards presses a pulley yoke 8, the pulley yoke 8 is clamped at the lower end of the pay-off hole 5, the limiting plate 11 is clamped at the upper end of the pay-off hole 5, a bolt 13 on a connecting groove 12 is locked to complete clamping of the pay-off hole 5, and the hole depth of the actual pay-off hole 5 is obtained according to the vertical range;

step three, determining a detection point of an actual upper layer of the floor slab, rotating the main body part 1 to the direction of the detection point, moving the fixed column 19 to the detection point, connecting the fixed column 19 with the tape measure frame 17 through the tape measure 18, and extending and fixing the bottom end of the fixed column 19 downwards on the floor slab to obtain an extending distance a of the actual fixed column 19 of the upper layer;

step four, by sliding the middle position block 23, opening the laser 25 to irradiate the middle position block 23, and adjusting the downward extending piece 20 below the fixed column 19 to ensure that the actual middle position line 24 is positioned on the ray of the laser 25;

recording the direction and the length of an actual detection point, and recording as a polar coordinate X;

step six, an operator goes to the lower end of the floor slab, is positioned at the lower end of the main body part 1 through an auxiliary tool, obtains a position point of the lower end of the floor slab where the actual detection point is positioned according to the polar coordinate X of the detection point, adjusts the corresponding lower side fixing column 19 through the lower end of the main body part 1, obtains the adjustment height of the actual lower side fixing column 19, and accordingly obtains the extension distance b of the lower side fixing column 19;

and step seven, measuring the distances from the actual two measuring tapes 18 to the pay-off hole 5, thereby calculating the floor height at the actual detection point.

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.

Furthermore, it should be understood that although the present description refers to embodiments, not every embodiment may contain only a single embodiment, and such description is for clarity only, and those skilled in the art should integrate the description, and the embodiments may be combined as appropriate to form other embodiments understood by those skilled in the art.