Road gradient measuring device and measuring method for constructional engineering

Abstract

The invention relates to the technical field of constructional engineering, and provides a road gradient measuring device for constructional engineering, which comprises two mirror symmetrical shells, the top ends of the shells are provided with laser measuring heads for emitting laser and receiving laser reflection data, and the bottom ends of the two shells are connected through an unfolding shaft so as to unfold and fold the device; and the frame body is rotationally connected to the top end of one shell, the left end of the frame body is connected with the top end of the other shell through a fixing buckle so that the device can be limited after being stored and prevented from being unfolded, and the left end and the right end of the frame body are used for cleaning the laser measuring head through cleaning brushes. Rapid unfolding and folding are achieved through the unfolding shaft and the locking assembly. The design not only is convenient to carry and store, but also can adapt to different topographic conditions, including flat road surfaces and slopes. In addition, the cleaning brush of the device can effectively clean dirt on the surface of the laser measuring head.

Description

Technical Field

[0001] The present invention relates to the technical field of construction engineering, and particularly to a road slope measuring device and a measuring method for construction engineering. Background Art

[0002] In construction engineering and highway construction, the measurement of road slope is a key link to ensure construction quality and road safety. Accurate measurement of road slope can help construction personnel reasonably plan the construction scheme, ensure the flatness and drainage performance of the road, thereby extending the service life of the road and ensuring driving safety.

[0003] Existing automated measurement devices are usually large in size, inconvenient to carry and operate, and expensive, which limits their application in medium and small projects, resulting in great inconvenience and requiring a large amount of manpower for handling. Therefore, a road slope measuring device and a measuring method for construction engineering are needed. Summary of the Invention

[0004] In view of the deficiencies of the prior art, the present invention provides a road slope measuring device and a measuring method for construction engineering, which solve the problems that existing automated measurement devices are usually large in size, inconvenient to carry and operate, and expensive, which limits their application in medium and small projects, resulting in great inconvenience and requiring a large amount of manpower for handling.

[0005] To achieve the above objectives, the present invention is realized through the following technical solutions:

[0006] A road slope measuring device for construction engineering, comprising:

[0007] Two mirror-symmetrical shells, a laser measuring head for emitting laser and receiving laser reflection data is installed at the top of the shell, and the bottoms of the two shells are connected by a deployment shaft to deploy and store the device;

[0008] A frame body, the frame body is rotatably connected to the top of one of the shells, and the left end of the frame body is connected to the top of the other shell by a fixing buckle to limit the device after storing the device to prevent it from deploying. Cleaning brushes are provided at both the left and right ends of the frame body to clean the laser measuring head to avoid the surface dirt of the laser measuring head affecting the accuracy of the laser;

[0009] Two standing feet, the separated sides of the two standing feet are each supported on a flat road surface and a slope after the device is deployed by a deployment assembly, and the deployment shaft locks the deployment assembly after deployment through a locking assembly.

[0010] Preferably, the deployment shaft includes a damping shaft, and connecting shafts are fixedly connected to the rotating parts at both ends of the damping shaft, and the connecting shafts are rotatably connected to the bottom of the shell.

[0011] Preferably, a laser transmitter, a reflection receiver and a gyro corrector are arranged inside the laser measuring head, and the laser measuring head is wirelessly connected to a remote terminal to control the measuring work of the laser measuring head.

[0012] Preferably, the cleaning brush comprises two rotating sleeves rotatably connected to the left and right ends of the top side of the frame body respectively, an inner shaft is slidably connected inside the rotating sleeve, and a cotton pad is arranged on the bottom side of the inner shaft.

[0013] Preferably, a spline shaft is fixedly connected to the outer wall of the inner shaft, a spline cavity is opened inside the rotating sleeve, the spline shaft is slidably connected inside the spline cavity through a spring, and the top end of the inner shaft passes through the top side of the rotating sleeve.

[0014] Preferably, the unfolding assembly includes two sliding frames fixedly connected to the inside of the shell, the sliding frames are connected to the standing feet through two connecting rods, the two middle ends are cross-rotatably connected, the bottom end of the sliding frame at one end of one of the connecting rods is rotatably connected to the bottom end of the sliding frame, one end of the other connecting rod is slidably connected to the sliding frame, and the other ends of the two connecting rods are slidably connected to the side of the standing foot close to the sliding frame.

[0015] Preferably, the locking assembly includes a rotating rod fixedly connected to the top side of the connecting shaft, the top side of the rotating rod is fixedly connected to a screw, the adjacent sides of the two sliding frames are slidably connected to a limiting plate, the middle end of the limiting plate is threadedly connected to the outer wall of the screw, and the screw is located on the top side of two of the connecting rods.

[0016] Preferably, the fixing buckle includes a belt fixedly connected to the left side of the top end of the other shell, the left side of the frame is fixedly connected with a belt buckle, the top end of the belt passes through the top end of the belt buckle, and the top end and the middle end of the belt are connected by a magnetic buckle.

[0017] A method for measuring the slope of a road for construction engineering comprises the following steps:

[0018] Step 1: Wipe the lens surface of the laser measuring head before unfolding;

[0019] Step 2: After wiping, unfold the device and pull the two shells to rotate the connecting shafts at the bottom of the two shells around the damping shaft to expose the standing feet;

[0020] Step 3: Pull the standing foot, so that the standing foot pulls the two connecting rods connected thereto, and the connecting rod (13) slides on the standing foot when subjected to force, and slides and rotates on the sliding frame, so that the connected connecting rods are in an "X" shape to support the standing foot;

[0021] Step 4: Rotate the outer shell of the housing by 180 degrees to limit the connection part of the top link on the sliding frame, prevent the upward displacement of this connection part, and thus stabilize the "X" structure of the link.

[0022] Step 5: Place the connection part of one housing on the flat ground and the other housing on the slope. Remotely start the laser emitter inside the laser measuring head through the remote terminal to emit laser.

[0023] Step 6: Align the laser irradiation with the ground, make the laser stick to the ground to draw a laser line, and place the reflector on the laser straight line.

[0024] Step 7: Use the remote terminal to start the gyro corrector to correct the laser emission path of the laser emitter. According to the gyro horizontal deviation built in the gyro corrector, correct the laser emitted by the laser measuring head located on the slope to make the laser parallel to the slope.

[0025] Step 8: The laser irradiated on the reflector is reflected by the reflector and projected onto the reflection receiver. The data of the reflected laser is received and fed back to the remote terminal.

[0026] Preferably, after the device in Step 5 is unfolded, the housing and the standing foot are in a parallel relationship.

[0027] Working principle: When measuring the road slope, first unfold the device. Before unfolding, wipe the lens surface of the laser measuring head first, press the exposed inner shaft to displace the inner shaft, and then drive the cotton pad connected to it to press against the lens of the laser measuring head. At the same time, the spline shaft connected to the inner shaft compresses the spring in the spline cavity, rotate the rotating sleeve, and drive the internal shaft to rotate together, so that the cotton pad wipes the lens of the laser measuring head. After wiping, let go, and the reset spring pushes the spline shaft connected to the inner shaft. The key shaft drives the inner shaft to reset. At this time, remove the belt from the belt buckle to release the splicing and fixation of the two shells. Then pull the two shells to make the connecting shafts at the bottom of the two shells rotate around the damping shaft to expose the standing feet. Then pull the standing feet to make the standing feet pull the two connecting rods connected to them. The connecting rods slide on the standing feet under the force, and slide and rotate on the sliding frame, so that the connected connecting rods are in an "X" shape to support the standing feet. Then rotate the outer shell of the shell to make the internal connecting shaft rotate relative to the shell, so that the connecting shaft connected to the standing feet is in a rotating state. The rotating rod and the screw connected to the shaft rotate together, and the screw thread drives the limit plate to displace the limit plate, thereby limiting the connection part of the top connecting rod on the sliding frame to prevent the connection part from displacing upward, thereby stabilizing the "X" structure of the connecting rod. After flipping the shell 180 degrees, the frame is rotated so that the frame does not block the lens of the laser measuring head. Then, the connection part of one shell is placed on the flat ground, and the other shell is placed on the slope. The laser transmitter inside the laser measuring head is remotely started through the remote terminal to emit laser, and then the laser is directed to the ground so that the laser is close to the ground to draw the laser, and the reflector is placed on the laser straight line. Then, the gyroscope corrector is started by the remote terminal so that the gyroscope corrector corrects the laser emission path of the laser transmitter. According to the horizontal deviation of the gyroscope built into the gyroscope corrector, the laser emitted by the laser measuring head located on the slope is corrected so that the laser is parallel to the slope and irradiated on the reflector so that the laser is reflected by the reflector and projected onto the reflection receiver, which receives the data of the reflected laser and feeds the data back to the remote terminal.

[0028] The present invention provides a road slope measuring device and method for construction engineering.

[0029] Beneficial effects:

[0030] 1. The invention realizes rapid deployment and storage through the deployment axis and locking assembly. This design is not only convenient for carrying and storage, but also can adapt to different terrain conditions, including flat roads and slopes. In addition, the cleaning brush design of the device can effectively clean the dirt on the surface of the laser measuring head, ensuring that the measurement accuracy is not affected, and further improving the stability and reliability of the device.

[0031] 2. Through the combination of a laser measuring head and a gyroscope corrector, the present invention achieves high-precision slope measurement. With the assistance of a wirelessly connected remote terminal, measurement data can be transmitted in real time, facilitating remote monitoring and analysis by construction personnel, and improving construction efficiency and management level. BRIEF DESCRIPTION OF THE DRAWINGS

[0032] Figure 1 is a perspective view of the present invention;

[0033] Figure 2 is a schematic diagram of the connection structure of the frame body of the present invention;

[0034] Figure 3 is a schematic diagram of the position of the cotton pad of the present invention;

[0035] Figure 4 is a schematic diagram of the internal structure of the rotating sleeve of the present invention;

[0036] Figure 5 is a schematic diagram of the structure of the inner shaft of the present invention;

[0037] Figure 6 is a schematic diagram of the position of the standing foot of the present invention;

[0038] Figure 7 is a schematic diagram of the fully expanded state of the present invention;

[0039] Figure 8 is a schematic diagram of the internal structure of the housing of the present invention;

[0040] Figure 9 is a schematic diagram of the structure of the limiting plate of the present invention;

[0041] Figure 10 is a schematic diagram of the connection structure of the connecting rod of the present invention;

[0042] Figure 11 is Figure 1 an enlarged schematic diagram of the structure at position A of

[0043] Figure 12 is a schematic diagram of the structure of the laser measuring head of the present invention.

[0044] Wherein, 1. housing; 2. damping shaft; 3. frame body; 4. rotating sleeve; 5. inner shaft; 6. spline shaft; 7. cotton pad; 8. standing foot; 9. connecting shaft; 10. rotating rod; 11. screw; 12. sliding frame; 13. connecting rod; 14. belt; 15. belt buckle; 16. laser measuring head; 17. limiting plate; 18. laser emitter; 19. reflection receiver; 20. gyroscope corrector; 21. remote terminal. DETAILED DESCRIPTION OF THE INVENTION

[0045] The following will clearly and completely describe the technical solutions in the embodiments of the present invention with reference to the accompanying drawings in the embodiments of the present invention. Obviously, the described embodiments are only a part of the embodiments of the present invention, rather than all the embodiments. All other embodiments obtained by those of ordinary skill in the art based on the embodiments of the present invention without creative efforts shall fall within the protection scope of the present invention.

[0046] Embodiment:

[0047] As an aspect of the present application, an embodiment of the present invention provides a road slope measuring device for construction engineering, including:

[0048] Please refer to the attached Figure 1 attachment Figure 6 and the attached Figure 8 , two mirror-symmetrical shells 1. A laser measuring head 16 for emitting laser and receiving laser reflection data is installed at the top of the shell 1. The bottoms of the two shells 1 are connected by a deployment shaft to deploy and store the device. The deployment shaft is composed of a damping shaft 2 and connecting shafts 9 fixedly connected to both ends of the damping shaft 2. The connecting shaft 9 is rotatably connected to the bottom of the shell 1.

[0049] Specifically, by pulling the two shells 1, the connecting shafts 9 at the bottoms of the two shells 1 rotate around the damping shaft 2, and the shell 1 is rotated 180 degrees to completely deploy the device to adapt to the slope of the road.

[0050] Please refer to the attached Figure 2 attachment Figure 7 and the attached Figure 12 , a laser emitter 18, a reflection receiver 19 and a gyroscope corrector 20 are arranged inside the laser measuring head 16. The laser measuring head 16 is wirelessly connected to a remote terminal 21 to control the measurement work of the laser measuring head 16;

[0051] Specifically, the laser emitter 18 inside the laser measuring head 16 is remotely started through the remote terminal 21 to emit laser. Subsequently, the laser is irradiated and aligned with the ground to make the laser stick to the ground to draw a laser line. A reflecting mirror is placed on the laser straight line. Then, the gyroscope corrector 20 is started through the remote terminal 21 to correct the laser emission path of the laser emitter 18. According to the gyroscopic horizontal deviation built in the gyroscope corrector 20, the laser emitted by the laser measuring head 16 on the slope is corrected to make the laser parallel to the slope and irradiate it on the reflecting mirror, so that the laser is reflected by the reflecting mirror and projected onto the reflection receiver 19 to receive the data of the reflected laser. The data is fed back to the remote terminal 21, and the slope deviation degree and flatness are determined according to the reflected laser data to complete the measurement work.

[0052] Please refer to the attached Figure 3 -attachmentFigure 5 The frame 3 is rotatably connected to the top end of one of the housings 1, and the left end of the frame 3 is connected to the top end of the other housing 1 through a fixing buckle to limit the device after the storage device to prevent it from unfolding. Cleaning brushes are provided at both the left and right ends of the frame 3 to clean the laser measuring head 16, so as to avoid the influence of dirt on the surface of the laser measuring head 16 on the accuracy of the laser. The cleaning brush is mainly composed of two rotating sleeves 4 respectively rotatably connected to the left and right ends of the top side of the frame 3. An inner shaft 5 is slidably connected inside the rotating sleeve 4. A cotton pad 7 is provided at the bottom side of the inner shaft 5. A spline shaft 6 is fixedly connected to the outer wall of the inner shaft 5. A spline cavity is formed inside the rotating sleeve 4. The spline shaft 6 is slidably connected inside the spline cavity through a spring. The top end of the inner shaft 5 penetrates through the top side of the rotating sleeve 4;

[0053] Specifically, the cotton pad 7 is fixedly adhered to the bottom side of the inner shaft 5 through an adhesive film to replace it after the cotton pad 7 is excessively soiled. When wiping the lens surface of the laser measuring head 16, press the exposed inner shaft 5 to displace the inner shaft 5, and then the inner shaft 5 drives the connected cotton pad 7 to abut against the lens of the laser measuring head 16. At the same time, the spline shaft 6 connected to the inner shaft 5 compresses the spring in the spline cavity. Rotate the rotating sleeve 4 to drive the inner shaft 5 inside it to rotate together, so that the cotton pad 7 wipes the lens of the laser measuring head 16. After wiping, release the hand, and the reset spring pushes the spline shaft 6 connected to the inner shaft 5 to drive the inner shaft 5 to reset.

[0054] Please refer to the appendix Figure 8 - appendix Figure 10 There are two standing feet 8. On the separated sides of the two standing feet 8, expansion components are used to support the device on a flat road surface and a slope after the device is unfolded. The expansion shaft is locked by a locking component. The expansion component includes two sliding frames 12 fixedly connected inside the housing 1. The sliding frames 12 and the standing feet 8 are connected by two connecting rods 13. The middle ends of the two connecting rods 13 are cross-rotatably connected. One end of one connecting rod 13 is rotatably connected to the bottom end of the sliding frame 12, and one end of the other connecting rod 13 is slidably connected to the sliding frame 12. The other ends of the two connecting rods 13 are slidably connected to the side of the standing feet 8 close to the sliding frame 12. The locking component includes a rotating rod 10 fixedly connected to the top side of the connecting shaft 9. A screw rod 11 is fixedly connected to the top side of the rotating rod 10. A limiting plate 17 is slidably connected to the adjacent sides of the two sliding frames 12. The middle end of the limiting plate 17 is threadedly connected to the outer wall of the screw rod 11. The screw rod 11 is located above two of the connecting rods 13;

[0055] Specifically, by pulling the footrest 8, the footrest 8 can pull the two connecting rods 13 connected thereto. The connecting rods 13 slide on the footrest 8 when subjected to force. Among them, the sliding connection part between the footrest 8 and the connecting rods 13 is provided with a rubber pad to have a certain frictional force to reduce the slipping of the connection structure. Sliding and rotating on the sliding frame 12 will make the connected connecting rods 13 in an "X" shape to support the footrest 8. Subsequently, rotate the outer shell of the housing 1 so that the internal connecting shaft 9 is in a rotating state relative to the housing 1, and the rotating rod 10 and the screw rod 11 connected to the connecting shaft 9 will rotate together. The screw rod 11 drives the limit plate 17 through thread, causing the limit plate 17 to displace, and then limiting the connection part of the top connecting rod 13 on the sliding frame 12 to prevent the connection part from moving upward, thereby stabilizing the "X" structure of the connecting rod 13.

[0056] Please refer to the appendix Figure 1 and the appendix Figure 11 As shown in the figure, the fixing buckle includes a belt 14 fixedly connected to the left side of the top of another housing 1. A belt buckle 15 is fixedly connected to the left side of the frame 3. The top of the belt 14 passes through the top of the belt buckle 15, and the top and middle of the belt 14 are connected by a magnetic buckle. By connecting and fixing the frame 3 connected to one of the housings 1 to another housing 1, the two housings 1 are combined and fixed.

[0057] Based on the above-provided road slope measuring device for construction engineering, as another aspect of the present application, a road slope measuring method for construction engineering includes the following steps:

[0058] Step 1: Before unfolding, wipe the lens surface of the laser measuring head 16.

[0059] Step 2: After wiping, unfold the device, pull the two housings 1, and make the connecting shafts 9 at the bottoms of the two housings 1 rotate around the damping shaft 2 so that the footrests 8 are exposed.

[0060] Step 3: Pull the footrest 8 to make the footrest 8 pull the two connecting rods 13 connected thereto. The connecting rods 13 slide on the footrest 8 when subjected to force, and slide and rotate on the sliding frame 12 to make the connected connecting rods 13 in an "X" shape to support the footrest 8.

[0061] Step 4: Rotate the outer shell of the housing 1 by 180 degrees to limit the connection part of the top connecting rod 13 on the sliding frame 12 to prevent the connection part from moving upward, thereby stabilizing the "X" structure of the connecting rod 13.

[0062] Step 5: Place the connection part of one housing 1 on the flat ground and the other housing 1 on the slope surface. Remotely start the laser emitter 18 inside the laser measuring head 16 through the remote terminal 21 to emit laser. Among them, after the device is unfolded, the housing 1 and the footrest 8 are in a parallel relationship.

[0063] Step Six: Align the laser irradiation with the ground, make the laser close to the ground to draw a laser line, and place the reflector on the laser straight line;

[0064] Step Seven: Use the remote terminal 21 to start the gyroscope corrector 20, so that the gyroscope corrector 20 corrects the laser emission path of the laser emitter 18, and corrects the laser emitted by the laser measurement head 16 located on the slope according to the gyroscopic horizontal deviation built in the gyroscope corrector 20, so that the laser is parallel to the slope;

[0065] Step Eight: The laser irradiated on the reflector reflects the laser through the reflector and projects it onto the reflection receiver 19. The data of the reflected laser is received and fed back to the remote terminal 21.

[0066] Although the embodiments of the present invention have been shown and described, those of ordinary skill in the art can understand that various changes, modifications, substitutions and variations can be made to these embodiments without departing from the principle and spirit of the present invention. The scope of the present invention is defined by the appended claims and their equivalents.

Claims

1. A road slope measuring device for construction engineering, characterized in that: include: Two mirror-symmetrical shells (1), the top ends of the shells (1) being equipped with a laser measuring head (16) for emitting laser light and receiving laser reflection data, and the bottom ends of the two shells (1) being connected via an unfolding shaft for unfolding and accommodating the device; A frame (3), the frame (3) being rotatably connected to the top of one of the shells (1), and the left end of the frame (3) being connected to the top of the other shell (1) via a fixing buckle, so as to limit the position of the device after the device is stored to prevent it from being unfolded, and the left and right ends of the frame (3) are both cleaned with a cleaning brush to clean the laser measuring head (16) to prevent the surface of the laser measuring head (16) from being dirty and affecting the accuracy of the laser; Two standing feet (8), the separated sides of the two standing feet (8) are used to support the device on a flat road surface and a slope after the device is unfolded through an unfolding component, and the unfolding shaft is used to lock the unfolded unfolding component through a locking component.

2. A road slope measuring device for construction engineering according to claim 1, characterized in that: The unfolding shaft comprises a damping shaft (2), and the rotating parts at both ends of the damping shaft (2) are fixedly connected to connecting shafts (9), and the connecting shafts (9) are rotatably connected to the bottom end of the shell (1).

3. A road slope measuring device for construction engineering according to claim 1, characterized in that: The laser measuring head (16) is provided with a laser transmitter (18), a reflection receiver (19) and a gyro corrector (20) inside, and the laser measuring head (16) is wirelessly connected to a remote terminal (21) to control the measuring work of the laser measuring head (16).

4. A road slope measuring device for construction engineering according to claim 1, characterized in that: The cleaning brush comprises two rotating sleeves (4) which are respectively rotatably connected to the left and right ends of the top side of the frame (3); an inner shaft (5) is slidably connected inside the rotating sleeve (4); and a cotton pad (7) is arranged on the bottom side of the inner shaft (5).

5. A road slope measuring device for construction engineering according to claim 4, characterized in that: The outer wall of the inner shaft (5) is fixedly connected with a spline shaft (6), the interior of the rotating sleeve (4) is provided with a spline cavity, the spline shaft (6) is slidably connected inside the spline cavity via a spring, and the top end of the inner shaft (5) passes through the top side of the rotating sleeve (4).

6. A road slope measuring device for construction engineering according to claim 2, characterized in that: The unfolding assembly comprises two sliding frames (12) fixedly connected to the inside of the shell (1); the sliding frames (12) are connected to the standing feet (8) via two connecting rods (13); the middle ends of the two (13) are cross-rotatably connected; one end of the sliding frame (12) is rotatably connected to the bottom end of the sliding frame (12); one end of the other connecting rod (13) is slidably connected to the sliding frame (12); and the other ends of the two connecting rods (13) are slidably connected to one side of the standing feet (8) close to the sliding frame (12).

7. A road slope measuring device for construction engineering according to claim 6, characterized in that: The locking assembly comprises a rotating rod (10) fixedly connected to the top side of the connecting shaft (9), a screw rod (11) fixedly connected to the top side of the rotating rod (10), a limiting plate (17) slidably connected to the adjacent sides of the two sliding frames (12), a middle end of the limiting plate (17) being threadedly connected to the outer wall of the screw rod (11), and the screw rod (11) being located on the top sides of two of the connecting rods (13).

8. A road slope measuring device for construction engineering according to claim 1, characterized in that: The fixing buckle comprises a belt (14) fixedly connected to the left side of the top end of the other shell (1); the left side of the frame (3) is fixedly connected to a belt buckle (15); the top end of the belt (14) passes through the top end of the belt buckle (15); and the top end and the middle end of the belt (14) are connected via a magnetic buckle.

9. A method for measuring the slope of a road for construction engineering, using a device for measuring the slope of a road for construction engineering as claimed in any one of claims 1 to 8, characterized in that: The following steps are involved: Step 1: before unfolding, wipe the lens surface of the laser measuring head (16); Step 2: After wiping, unfold the device and pull the two shells (1) to rotate the connecting shafts (9) at the bottom ends of the two shells (1) around the damping shaft (2) to expose the standing feet (8); Step 3: Pull the standing foot (8) so that the standing foot (8) pulls the two connecting rods (13) connected thereto, and the connecting rods (13) slide on the standing foot (8) when subjected to force, and slide and rotate on the sliding frame (12), so that the connected connecting rods (13) are in an "X" shape to support the standing foot (8); Step 4: Rotate the outer shell of the housing (1) 180 degrees to limit the connection portion of the top connecting rod (13) on the sliding frame (12) to prevent the connection portion from moving upward, thereby stabilizing the "X" structure of the connecting rod (13); Step 5: Place the connection part of one housing (1) on flat ground, and place the other housing (1) on a slope, and remotely start the laser transmitter (18) inside the laser measuring head (16) through the remote terminal (21) to emit laser; Step 6: Aim the laser at the ground, draw the laser close to the ground, and place the reflector on the laser line; Step 7: Using the remote terminal (21) to start the gyro corrector (20), the gyro corrector (20) corrects the laser emission path of the laser transmitter (18), and according to the gyro horizontal deviation built into the gyro corrector (20), corrects the laser emitted by the laser measuring head (16) located on the slope, so that the laser is parallel to the slope; Step 8: The laser irradiated on the reflector is reflected by the reflector and projected onto the reflective receiver (19), which receives data of the reflected laser and feeds the data back to the remote terminal (21).

10. A method for measuring road slope for construction engineering according to claim 9, characterized in that: In step 5, after the device is unfolded, the housing (1) and the standing foot (8) are in parallel relationship.

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