Building wall flatness detection system

Abstract

A building wall flatness detection system belongs to the technical field of building machinery and comprises a detection mechanism and an auxiliary mechanism, the detection mechanism comprises a power supply module, a controller, a reference plate and detection units, the detection units are arranged in a matrix and comprise a rectangular detection plate, a first electric cylinder, a ball seat and a spring, the reference plate is provided with a first three-axis tilt angle sensor, and the first three-axis tilt angle sensor is provided with a second three-axis tilt angle sensor. The detection plate is provided with a second three-axis tilt angle sensor, the controller is electrically connected with the power module and electrically connected with the first electric cylinders, the first three-axis tilt angle sensor and the second three-axis tilt angle sensor through wires, and the controller is further electrically connected with a displayer and a control panel through wires. According to the invention, the flatness of the selected position of the wall surface can be rapidly measured, the method is not only suitable for the wall surface of a low-rise building, but also suitable for the wall surface of a high-rise building, the detection efficiency is high, the practicability is strong, and the defects of tedious operation, low efficiency and large detection result error of flatness detection in the prior art are overcome.

Description

Technical Field

[0001] The invention belongs to the technical field of construction machinery, and in particular relates to a building wall flatness detection system. Background Art

[0002] The flatness of building walls is an important reflection of construction quality. Most existing detection methods rely on rulers or laser levels, which are not only cumbersome to operate and inefficient, but also easily affected by human factors. In addition, there are many patents in the patent library regarding wall flatness detection. For example, there is a method of detection through a laser rangefinder sensor. The measurement light of the laser rangefinder sensor is projected onto the wall, and the straightness of a line is calculated based on the data of several projection points, and then a surface flatness image is formed by several lines. This type of method also has the problems of a long measurement process and cumbersome operation and calculation.

[0003] Based on the above content, it can be known that how to achieve fast and effective flatness detection of building walls is a technical problem that needs to be solved. Summary of the invention

[0004] The invention discloses a building wall flatness detection system, aiming at solving the problems existing in the prior art recorded in the background technology part.

[0005] To achieve the above purpose, the technical solution of the present invention is:

[0006] A building wall flatness detection system includes a detection mechanism and an auxiliary mechanism, wherein the auxiliary mechanism includes a first auxiliary mechanism connected to the detection mechanism and used to perform flatness detection on the wall of a low-rise building, and a second auxiliary mechanism connected to the detection mechanism and used to perform flatness detection on the wall of a high-rise building structure; the detection mechanism includes a power module, a controller, a reference plate, and a detection unit, wherein the reference plate is used to connect the detection unit and provide a reference reference for the detection position positioning of the detection unit, and the detection units are arranged in a matrix, including rectangular detection plates, the inner surface of each detection plate is connected to the reference plate through a first electric cylinder, and the fixed end of the first electric cylinder is fixed to the reference plate The telescopic end is connected, and extends outward in a direction perpendicular to the reference plate. A ball seat is provided at the telescopic end. The telescopic end is hinged to the middle ball on the inner surface of the detection plate through the ball seat. A plurality of springs are also provided around the ball seat on the inner surface of the detection plate. The two ends of the springs are respectively connected to the detection plate and the outer surface of the telescopic end, so that the detection plate can adaptively adjust its posture when squeezing the wall. The reference plate is provided with a first three-axis inclination sensor, and the detection plate is provided with a second three-axis inclination sensor. The controller is electrically connected to the power module, and is respectively electrically connected to each of the first electric cylinder, the first three-axis inclination sensor, and the second three-axis inclination sensor through wires. The controller is also electrically connected to a display and a control panel through wires.

[0007] Preferably, the reference plate is a rectangular plate, and detection units are arranged in a matrix on the outer surface of the reference plate. Adjacent detection plates are gap-fitted, and several detection plates constitute an actuator for flatness detection of a set area of ​​the wall. The controller draws a three-dimensional graph of the reference plate according to a preset program based on the inclination angle of the reference plate, and then draws a flatness graph of the wall targeted by the detection plate based on the inclination angle data of the detection plate when each detection plate is tightly fitted against the wall and the elongation data of the first electric cylinder connected to the detection plate, and draws the positional relationship between the flatness graph and the three-dimensional graph of the reference plate. The flatness graphs of several detection plates are connected to form a result graph of the entire actuator for wall flatness detection. During the detection process, each detection unit operates in sequence to avoid mutual interference.

[0008] Preferably, the detection mechanism also includes a distance control component for controlling the distance between the reference plate and the wall, and cooperating with an auxiliary mechanism to ensure that the inner surface of the reference plate is always within a set longitudinal plane for wall detection. By controlling the position of the inner surface of the reference plate, several result images for wall flatness detection are spliced ​​into a larger range of wall flatness detection result image or into a flatness detection result image of the entire wall.

[0009] Preferably, the distance control component includes second electric cylinders arranged in a rectangular shape at the four corners of the inner surface of the reference plate, the second electric cylinders are set in a direction perpendicular to the inner surface of the reference plate, the fixed end of the second electric cylinder is fixedly connected to the reference plate, the telescopic end is fixedly connected to a pressure plate, the outer surface of the pressure plate is provided with a first pressure sensor, and a second pressure sensor is also connected between the fixed end of the first electric cylinder and the inner surface of the reference plate, and the second electric cylinder, the first pressure sensor, and the second pressure sensor are electrically connected to the controller through wires respectively.

[0010] Preferably, the first auxiliary mechanism includes a base, adjustable height support legs, universal wheels with brakes, vertical plates, and diagonal support plates. A level is installed on the base, and the four corners of the lower surface of the base are connected to universal wheels through adjustable height support legs. A vertical plate is provided at the front end of the base in a direction perpendicular to the upper end of the base, and the front end of the vertical plate is detachably connected to the reference plate through a plurality of connecting rods. The reference plate and the vertical plate are parallel to each other, and a diagonal support plate is connected between the outer surface of the vertical plate and the upper end of the base. A counterweight block is also provided at the upper end of the base. When the base is leveled, the vertical plate is in a vertical posture. During detection, the base is leveled and Make the inner surface of the reference plate parallel to the wall root line, brake the universal wheel, extend the second electric cylinder, and stop when the first pressure sensor detects a signal. The four second electric cylinders and the first auxiliary mechanism jointly limit the inner surface of the reference plate within the set longitudinal plane, and then start each detection unit in turn to perform wall flatness detection. During the detection, the first electric cylinder extends, and the detection plate adaptively adjusts its posture according to the inclination of the wall. When the value detected by the second pressure sensor reaches the set standard, the first electric cylinder stops moving, and the controller records the extension of the first electric cylinder and the corresponding inclination data of the detection plate.

[0011] Preferably, the top of the reference plate is symmetrically provided with hanging rings, and both sides of the reference plate are symmetrically provided with guide holes penetrating the upper and lower end surfaces.

[0012] Preferably, the second auxiliary mechanism includes a beam fixed in a horizontal posture on the top of the building wall and extending outward, the left and right ends of the beam located on the outside of the wall are symmetrically provided with first guide wheels, a through groove is opened in the middle of the part of the beam extending out of the wall, a lifting mechanism is installed on the upper end of the through groove, the lifting rope of the lifting mechanism passes through the through groove and is connected to the lifting ring, a third three-axis inclination sensor is installed on the lifting rope, a guide rope passes through the guide hole, the upper end of the guide rope bypasses the first guide wheel and is connected to a pulling cylinder fixed on the side wall of the beam, the lower end of the guide rope is used to bypass the second guide wheel preset at the bottom of the wall, the guide rope between the first guide wheel and the second guide wheel is in a vertical posture, the two guide ropes limit the inner surface of the reference plate to move along the longitudinal plane and be parallel to the wall root line, at this time the lifting rope is vertical.

[0013] Preferably, the second auxiliary mechanism ensures that the reference plate is located in the same longitudinal plane when the wall flatness detection is performed in the following manner: the lifting mechanism lowers the reference plate, during which the pulling cylinder pulls the upper end of the guide rope, the lower end of the guide rope is connected to the second guide wheel, and is tightened manually or by equipment, and the posture of the reference plate is limited by the tightening of the guide rope. After reaching the detection position, the lifting mechanism stops, and the controller is started through the control panel. The second electric cylinder extends, and when the four first pressure sensors have signals, it means that the four pressure plates are in contact with the wall. Then, by adjusting the length of the second electric cylinder, the lifting rope and the reference plate are placed in a vertical posture, and the error of controlling the verticality of the inner surface of the reference plate by the guide rope is corrected, and then the detection is started.

[0014] The beneficial effects of the building wall flatness detection system of the present invention are:

[0015] The detection mechanism of the present invention includes a plurality of detection units arranged in a matrix, which can quickly perform flatness measurement on a selected position of a wall surface. The detection mechanism is not only applicable to the walls of low-rise buildings, but also to the walls of high-rise buildings. The detection efficiency is high and the practicability is strong, and the defects of the prior art of flatness detection, such as complicated operation, low efficiency and large error of the detection result, are overcome. BRIEF DESCRIPTION OF THE DRAWINGS

[0016] Figure 1 It is a schematic structural diagram of the present invention when used on the first auxiliary mechanism.

[0017] Figure 2 It is a front view structural schematic diagram of the reference plate of the present invention.

[0018] Figure 3 It is a side structural schematic diagram of the present invention when used in combination with the second auxiliary mechanism.

[0019] Figure 4 It is a structural schematic diagram of the detection unit of the present invention.

[0020] The figure shows: 1-base, 2-adjustable height support leg, 3-level, 4-counterweight, 5-controller, 6-diagonal support plate, 7-display, 8-power module, 9-control panel, 10-detection unit, 11-reference plate, 12-second electric cylinder, 13-pressing plate, 14-connecting rod, 15-vertical plate, 16-first three-axis inclination sensor, 17-guide hole, 18-lifting ring, 19-building structure, 20-crossbeam, 21-lifting mechanism, 22-first guide wheel, 23-pulling cylinder, 24-guide rope, 25-lifting rope, 26-second guide wheel; 101-detection plate, 102-first electric cylinder, 103-spring. DETAILED DESCRIPTION

[0021] The following description is only a preferred embodiment of the present invention and is not intended to limit the scope of protection of the present invention. Any modifications, equivalent substitutions and improvements made within the spirit and principles of the present invention should be included in the scope of protection of the present invention.

[0022] The following embodiments may be understood as individually expressing a part of a local structure or method of the present invention, or may be understood as a combination of the embodiments to explain the connotation of a larger structure or method of the present invention.

[0023] Example 1

[0024] A building wall flatness detection system, such as Figure 1-4As shown, it includes a detection mechanism and an auxiliary mechanism, the auxiliary mechanism includes a first auxiliary mechanism connected to the detection mechanism and used to detect the flatness of the wall surface of a low-rise building, and a second auxiliary mechanism connected to the detection mechanism and used to detect the flatness of the wall surface of a high-rise building structure; the detection mechanism includes a power module 8, a controller 5, a reference plate 11, and a detection unit 10, the reference plate 11 is used to connect the detection unit 10 and provide a reference reference for the detection position positioning of the detection unit 10, the detection units 10 are arranged in a matrix, including rectangular detection plates 101, the inner surface of each detection plate 101 is connected to the reference plate 11 through a first electric cylinder 102, the fixed end of the first electric cylinder 102 is fixedly connected to the reference plate 11, and the telescopic end is perpendicular to the reference plate 11. The plate 11 extends outward, and a ball seat is provided at the telescopic end. The telescopic end is hinged with the middle ball on the inner surface of the detection plate 101 through the ball seat. The inner surface of the detection plate 101 is also provided with a plurality of springs 103 around the ball seat. The two ends of the spring 103 are respectively connected to the detection plate 101 and the outer surface of the telescopic end, so that the detection plate 101 can adaptively adjust its posture when squeezing the wall. The reference plate 101 is provided with a first three-axis inclination sensor 16, and the detection plate is provided with a second three-axis inclination sensor (not shown in the figure). The controller 5 is electrically connected to the power module 8, and is respectively electrically connected to each first electric cylinder 102, the first three-axis inclination sensor 16, and the second three-axis inclination sensor through wires. The controller 5 is also electrically connected to the display 7 and the control panel 9 through wires.

[0025] In this embodiment, the controller, power module, display, and control panel can be installed at the required position according to the difference of auxiliary mechanisms. The mechanism of flatness detection by the detection unit is detailed in the following content.

[0026] Example 2

[0027] like Figure 1 , 2 As shown, the reference plate 11 is a rectangular plate, and detection units are arranged in a matrix on the outer surface of the reference plate 11. Adjacent detection plates 101 are gap-fitted, and a plurality of detection plates 101 constitute an actuator for flatness detection of a set area of ​​a wall. The controller 5 draws a three-dimensional graph of the reference plate according to a preset program based on the inclination angle of the reference plate 11, and then draws a flatness graph of the wall targeted by the detection plate based on the inclination angle data of the detection plate when each detection plate 101 is tightly fitted with the wall and the elongation data of the first electric cylinder 102 connected to the detection plate, and draws the positional relationship between the flatness graph and the three-dimensional graph of the reference plate 11. By connecting the flatness graphs of a plurality of detection plates 101, a result graph of the entire actuator for wall flatness detection is formed. During the detection process, each detection unit 10 acts in sequence to avoid mutual interference.

[0028] In this embodiment, since several detection boards are all detected based on the same reference board, several flatness graphs are connected together to form a result graph of the whole actuator for the wall flatness detection. In actual use, the building wall can be detected by random inspection, and the random inspection method can randomly select a position to detect the result graph of the whole actuator for the wall flatness detection.

[0029] Example 3

[0030] like Figure 1 , 2 As shown, the detection mechanism also includes a distance control component for controlling the distance between the reference plate 11 and the wall, and cooperating with the auxiliary mechanism to ensure that the inner surface of the reference plate 11 is always within the set longitudinal plane for wall detection. By controlling the position of the inner surface of the reference plate 11, a number of result images for wall flatness detection are spliced ​​into a larger range of wall flatness detection result image or spliced ​​into a flatness detection result image of the entire wall.

[0031] like Figure 1 , 2 As shown, the distance control component includes second electric cylinders 12 arranged in a rectangular shape at the four corners of the inner surface of the reference plate 11. The second electric cylinders 12 are arranged in a direction perpendicular to the inner surface of the reference plate 11. The fixed end of the second electric cylinder 12 is fixedly connected to the reference plate, and the telescopic end is fixedly connected to a pressure plate 13. A first pressure sensor (not shown in the figure) is provided on the outer surface of the pressure plate. A second pressure sensor (not shown in the figure) is also connected between the fixed end of the first electric cylinder 102 and the inner surface of the reference plate 11. The second electric cylinder, the first pressure sensor, and the second pressure sensor are electrically connected to the controller 5 through wires, respectively.

[0032] This embodiment provides a structural form of the distance control component, and the following is an example of a specific application in combination with an auxiliary mechanism.

[0033] Example 4

[0034] like Figure 1As shown, the first auxiliary mechanism includes a base 1, adjustable height support legs 2, universal wheels with brakes, vertical plates 15, and diagonal support plates 6. A level 3 is installed on the base 1. The four corners of the lower surface of the base 1 are connected to universal wheels through adjustable height support legs 2. The front end of the base 1 is provided with a vertical plate 15 in a direction perpendicular to the upper end of the base. The front end of the vertical plate 15 is detachably connected to the reference plate 11 through a plurality of connecting rods 14. The reference plate 11 and the vertical plate 15 are parallel to each other. The diagonal support plate 6 is connected between the outer surface of the vertical plate 15 and the upper end of the base 1. A counterweight 4 is also provided on the upper end of the base 1. When the base 1 is leveled, the vertical plate 15 is in a vertical posture. During detection, the base 1 is leveled. The base 1 is set, and the inner surface of the reference plate 11 is parallel to the wall root line, the universal wheel brakes, the second electric cylinder 12 is extended, and it stops when the first pressure sensor detects a signal. The four second electric cylinders 12 and the first auxiliary mechanism jointly limit the inner surface of the reference plate within the set longitudinal plane, and then each detection unit 10 is started in sequence to detect the flatness of the wall. During the detection, the first electric cylinder 102 is extended, and the detection plate 101 adjusts its posture adaptively according to the inclination of the wall. When the value detected by the second pressure sensor reaches the set standard, the first electric cylinder 102 stops moving, and the controller records the extension of the first electric cylinder 102 and the corresponding inclination data of the detection plate 101. That is, the inner surface of the reference plate is used as the reference plane, and the wall flatness map detected by the detection plate after a certain distance translation from the reference plane is obtained.

[0035] Example 5

[0036] like Figure 2 As shown, a hanging ring 18 is symmetrically provided at the top of the reference plate 11, and guide holes 17 penetrating the upper and lower end surfaces are symmetrically provided on both sides of the reference plate 11.

[0037] like Figure 3 As shown, the second auxiliary mechanism includes a beam 20 fixed to the top of the building wall in a horizontal posture and extending outward, the left and right ends of the beam 20 located on the outer side of the wall are symmetrically provided with first guide wheels 22 (only the first guide wheel on one side is drawn in the figure), a through groove is opened in the middle of the part of the beam 20 extending out of the wall (a common structure, not drawn in the figure), a lifting mechanism 21 is installed at the upper end of the through groove, a lifting rope 25 of the lifting mechanism 21 passes through the through groove and is connected to the lifting ring 18, a third three-axis inclination sensor (not drawn in the figure) is installed on the lifting rope 25, a guide rope 24 passes through the guide hole 17, the upper end of the guide rope 24 bypasses the first guide wheel 22 and is connected to the pulling cylinder 23 fixed on the side wall of the beam 20, the lower end of the guide rope 24 is used to bypass the second guide wheel 26 preset at the bottom of the wall, the guide rope between the first guide wheel and the second guide wheel is in a vertical posture, the two guide ropes limit the inner surface of the reference plate to move along the longitudinal plane and be parallel to the wall root line, and the suspension rope is vertical at this time.

[0038] Example 6

[0039] Based on Example 5, this embodiment discloses that the second auxiliary mechanism ensures that the reference plate 11 is located in the same longitudinal plane when the wall flatness detection is performed in the following manner: specifically, the lifting mechanism lowers the reference plate 11, during which the pulling cylinder 23 pulls the upper end of the guide rope, the lower end of the guide rope is connected to the second guide wheel, and is tightened manually or by equipment, and the posture of the reference plate is limited by the tightening of the guide rope. After reaching the detection position, the lifting mechanism stops, and the controller is started through the control panel. The second electric cylinder extends, and when the four first pressure sensors have signals, it means that the four pressure plates are in contact with the wall. Then, by adjusting the length of the second electric cylinder, the lifting rope and the reference plate are placed in a vertical posture, and the error of controlling the verticality of the inner surface of the reference plate by the guide rope is corrected (that is, the inner surface of the reference plate accurately returns to the set longitudinal plane), and then the detection is started.

[0040] In this embodiment, after the guide rope is strongly tightened, it constrains the position of the reference plate together with the second cylinder so that its inner surface is located within the set longitudinal plane. The spring designed around the ball seat is used to constrain the position of the detection plate so that it can be opposite to the wall. In the process of the detection plate adapting to the wall, the elastic force of the spring should not be sufficient to indirectly overcome the constraint force of the guide rope. By analogy, when the first electric cylinder presses the guide plate against the wall, the detection value of the second pressure sensor should also be insufficient to overcome the constraint force of the guide rope, thereby ensuring the accuracy of the detection result.

Claims

1. A building wall flatness detection system, characterized by: The invention comprises a detection mechanism and an auxiliary mechanism, wherein the auxiliary mechanism comprises a first auxiliary mechanism connected to the detection mechanism and used to detect the flatness of the wall surface of a low-rise building, and a second auxiliary mechanism connected to the detection mechanism and used to detect the flatness of the wall surface of a high-rise building structure; the detection mechanism comprises a power module, a controller, a reference plate, and a detection unit, wherein the reference plate is used to connect the detection unit and provide a reference reference for the detection position positioning of the detection unit, and the detection units are arranged in a matrix, comprising rectangular detection plates, wherein the inner surface of each detection plate is connected to the reference plate through a first electric cylinder, wherein the fixed end of the first electric cylinder is fixedly connected to the reference plate, and the telescopic end is connected along the It extends outward perpendicularly to the direction of the reference plate, and is provided with a ball seat at the telescopic end. The telescopic end is hinged to the middle ball on the inner surface of the detection plate through the ball seat. The inner surface of the detection plate is also provided with a plurality of springs around the ball seat, and the two ends of the springs are respectively connected to the detection plate and the outer surface of the telescopic end, so that the detection plate can adaptively adjust its posture when squeezing the wall. The reference plate is provided with a first three-axis inclination sensor, and the detection plate is provided with a second three-axis inclination sensor. The controller is electrically connected to the power module, and is respectively electrically connected to each of the first electric cylinder, the first three-axis inclination sensor, and the second three-axis inclination sensor through wires. The controller is also electrically connected to a display and a control panel through wires.

2. A building wall flatness detection system as claimed in claim 1, characterized in that: The reference plate is a rectangular plate, and detection units are arranged in a matrix on the outer surface of the reference plate. Adjacent detection plates are gap-matched, and several detection plates constitute an actuator for flatness detection of a set area of ​​a wall. The controller draws a three-dimensional graph of the reference plate according to a preset program based on the inclination angle of the reference plate, and then draws a flatness graph of the wall targeted by the detection plate based on the inclination angle data of the detection plate when each detection plate is tightly fitted with the wall and the elongation data of the first electric cylinder connected to the detection plate, and draws the positional relationship between the flatness graph and the three-dimensional graph of the reference plate. By connecting the flatness graphs of several detection plates, a result graph of the entire actuator for wall flatness detection is formed. During the detection process, each detection unit acts in sequence to avoid mutual interference.

3. A building wall flatness detection system as claimed in claim 2, characterized in that: The detection mechanism also includes a distance control component for controlling the distance between the reference plate and the wall, and cooperating with the auxiliary mechanism to ensure that the inner surface of the reference plate is always within the set longitudinal plane for wall detection. By controlling the position of the inner surface of the reference plate, several result images for wall flatness detection are spliced ​​into a larger range of wall flatness detection result image or spliced ​​into a flatness detection result image of the entire wall.

4. A building wall flatness detection system as claimed in claim 3, characterized in that: The distance control component includes a second electric cylinder arranged in a rectangular shape at the four corners of the inner surface of the reference plate. The second electric cylinder is set in a direction perpendicular to the inner surface of the reference plate. The fixed end of the second electric cylinder is fixedly connected to the reference plate, and the telescopic end is fixedly connected to a pressure plate. A first pressure sensor is provided on the outer surface of the pressure plate. A second pressure sensor is also connected between the fixed end of the first electric cylinder and the inner surface of the reference plate. The second electric cylinder, the first pressure sensor, and the second pressure sensor are electrically connected to the controller through wires respectively.

5. A building wall flatness detection system as claimed in claim 4, characterized in that: The first auxiliary mechanism includes a base, adjustable height support legs, universal wheels with brakes, vertical plates, and diagonal support plates. A level is installed on the base. The four corners of the lower surface of the base are connected to universal wheels through adjustable height support legs. The front end of the base is provided with a vertical plate in a direction perpendicular to the upper end of the base. The front end of the vertical plate is detachably connected to the reference plate through a plurality of connecting rods. The reference plate and the vertical plate are parallel to each other. A diagonal support plate is connected between the outer surface of the vertical plate and the upper end of the base. A counterweight block is also provided at the upper end of the base. When the base is leveled, the vertical plate is in a vertical posture. During detection, the base is leveled and the base is made The inner surface of the reference plate is parallel to the wall root line, the universal wheel brakes, the second electric cylinder extends, and stops when the first pressure sensor detects a signal. The four second electric cylinders and the first auxiliary mechanism jointly limit the inner surface of the reference plate within the set longitudinal plane, and then start each detection unit in turn to perform wall flatness detection. During the detection, the first electric cylinder extends, and the detection plate adaptively adjusts its posture according to the inclination of the wall. When the value detected by the second pressure sensor reaches the set standard, the first electric cylinder stops moving, and the controller records the extension of the first electric cylinder and the corresponding inclination data of the detection plate.

6. A building wall flatness detection system as claimed in claim 5, characterized in that: The top of the reference plate is symmetrically provided with hanging rings, and both sides of the reference plate are symmetrically provided with guide holes penetrating the upper and lower end surfaces.

7. A building wall flatness detection system as claimed in claim 6, characterized in that: The second auxiliary mechanism includes a beam fixed in a horizontal posture on the top of the building wall and extending outward, the left and right ends of the beam located on the outside of the wall are symmetrically provided with first guide wheels, a through groove is opened in the middle of the part of the beam extending out of the wall, a lifting mechanism is installed on the upper end of the through groove, the lifting rope of the lifting mechanism passes through the through groove and is connected to the lifting ring, a third three-axis inclination sensor is installed on the lifting rope, a guide rope passes through the guide hole, the upper end of the guide rope bypasses the first guide wheel and is connected to the pulling cylinder fixed on the side wall of the beam, the lower end of the guide rope is used to bypass the second guide wheel preset at the bottom of the wall, the guide rope between the first guide wheel and the second guide wheel is in a vertical posture, the two guide ropes limit the inner surface of the reference plate to move along the longitudinal plane and be parallel to the wall root line, at this time the lifting rope is vertical.

8. A building wall flatness detection system as claimed in claim 7, characterized in that: The second auxiliary mechanism ensures that the reference plate is located in the same longitudinal plane when the wall flatness detection is carried out in the following manner: the lifting mechanism lowers the reference plate, during which the pulling cylinder pulls the upper end of the guide rope, the lower end of the guide rope is connected to the second guide wheel, and is tightened manually or by equipment. The posture of the reference plate is limited by the tightening of the guide rope. After reaching the detection position, the lifting mechanism stops, and the controller is started through the control panel. The second electric cylinder extends. When the four first pressure sensors have signals, it means that the four pressure plates are in contact with the wall. Then, by adjusting the length of the second electric cylinder, the lifting rope and the reference plate are placed in a vertical posture, and the error of controlling the verticality of the inner surface of the reference plate by the guide rope is corrected, and then the detection is started.

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