High-precision engineering cost length measuring instrument

Abstract

The invention relates to the technical field of measuring equipment, and particularly discloses a high-precision engineering cost length measuring instrument which comprises a machine body, rotating wheels are installed at the positions, close to corners, of the two sides of the machine body, protective grooves are formed in the two sides of the bottom of the machine body in the length direction, and connecting cylinders are rotationally installed on the inner walls of the two ends of each protective groove. A mounting sleeve is slidably mounted in the connecting cylinder, a mounting shaft is rotatably mounted in the mounting sleeve, the end, away from the connecting cylinder, of the mounting shaft penetrates through the mounting sleeve, a polygonal connecting groove is formed in the end, located in the connecting cylinder, of the mounting shaft, and a plurality of first supporting plates are mounted on the outer wall of the end, away from the connecting cylinder, of the mounting sleeve; the end, away from the mounting sleeve, of the first supporting plate is mounted on the side, close to the machine body, of the rotating wheel. According to the invention, different measurement modes can be selected for accurate measurement according to different terrains to be measured.

Description

Technical Field

[0001] The present invention relates to the technical field of measuring devices, and in particular to a high-precision length measuring instrument for project cost engineering. Background Technique

[0002] Project cost refers to the construction costs expected or actually incurred during the construction period of a project. Before the construction of a project, the overall area of the construction site and the occupied area of the construction are measured, and then the project cost is estimated. The location and terrain of the construction will also affect the measurement of the project cost. For example, when constructing on a hillside or an uneven road surface, it will affect the efficiency and accuracy of the measurement of the project cost.

[0003] Currently, the commonly used method for measuring length in project cost is a single laser rangefinder. Measuring the ground length often involves counting the number of rolling circles of a wheel on the ground. When in use, manual measurement by staff is required, and the measurement method of a single measuring device is relatively single. It is necessary to frequently change the measuring device and measurement method according to different terrains. When measuring a terrain such as a hillside with many stones on the surface, the accuracy of the common measuring devices is poor, and it is not convenient for measuring different terrains. Summary of the Invention

[0004] The purpose of the present invention is to solve the disadvantages existing in the prior art, and to propose a high-precision length measuring instrument for project cost engineering.

[0005] In order to achieve the above purpose, the present invention adopts the following technical scheme:

[0006] A high-precision length measuring instrument for project cost engineering, including a body. Rotating wheels are installed at the positions near the corners on both sides of the body. Protective grooves are opened on both sides of the bottom of the body in the length direction. Connecting cylinders are rotatably installed on the inner walls at both ends of the protective grooves. An installation sleeve is slidably installed inside the connecting cylinder. An installation shaft is rotatably installed inside the installation sleeve. One end of the installation shaft away from the connecting cylinder penetrates through the installation sleeve. A polygonal connecting groove is opened at one end of the installation shaft located inside the connecting cylinder. A plurality of first support plates are installed on the outer wall of the installation sleeve away from the connecting cylinder. One end of the first support plate away from the installation sleeve is installed on the inner wall of the rotating wheel close to the body.

[0007] Preferably, a sliding hole is opened on the top end of the outer wall of the connecting cylinder in the length direction. An installation groove is opened on the bottom end of the outer wall of the connecting cylinder near the rotating wheel in the length direction. Placement holes are opened on both outer walls of the connecting cylinder. Limiting rods are installed on both outer walls of the installation sleeve. The limiting rods are movably installed inside the placement holes. A spring is installed between the inner wall of the placement hole near the rotating wheel and the limiting rod.

[0008] Preferably, a polygonal limiting hole is formed in the inner wall of the connection cylinder at the end far from the rotating wheel. The outer wall of the installation sleeve at the end far from the rotating wheel is a polygonal outer wall. A rotating block is installed at the end of the installation shaft close to the rotating wheel, and a fixing plate is rotatably installed on the outer wall of the rotating block.

[0009] Preferably, a plurality of second support plates are installed on the outer wall of the fixing plate. The end of the second support plate far from the fixing plate is installed on the inner wall of the rotating wheel on the side far from the first support plate. The end of the installation shaft far from the connection cylinder is located between the fixing plate and the installation sleeve, and a plurality of fan blades are installed on the outer wall of the end of the installation shaft far from the connection cylinder.

[0010] Preferably, installation grooves are formed on the side of a plurality of the first support plates close to the machine body. Magnet blocks are installed on the inner walls of the installation grooves. Grooves are formed at the positions close to the corners on the side of the machine body. Electromagnetic sensors are installed on the inner walls of the grooves, and the electromagnetic sensors are located on the side of the magnet blocks.

[0011] Preferably, placing grooves matching the rotating wheels are formed on both sides of the bottom of the machine body. The placing grooves communicate with the inside of the protection grooves. A clamping block is installed at the inner top of the placing groove. A plurality of clamping grooves are formed on the side of the rotating wheel close to the machine body. A polygonal rotating rod matching the connection groove is rotatably installed at the inner top of the protection groove, and the rotating rod is located above the sliding hole.

[0012] Preferably, second motors are installed at the positions close to the corners on the inner walls of both sides of the machine body. The output shafts of the second motors are connected to the top ends of the rotating rods through couplings. First motors matching the connection cylinders are installed at the positions close to the inner bottom on the inner walls of both sides of the machine body. The output shafts of the first motors are connected to the ends of the connection cylinders far from the rotating wheels through couplings.

[0013] Preferably, fixing holes are formed on the inner walls of both ends of the machine body. A bottom hole is formed in the inner bottom of the machine body. An installation plate is installed at the inner bottom of the machine body. Laser rangefinders are installed at both ends of the installation plate. The ends of the laser rangefinders far from the installation plate are located on the side of the fixing holes. A terrain scanner is installed at the bottom of the installation plate, and the terrain scanner is located inside the bottom hole.

[0014] Preferably, a circuit control board is installed inside the machine body. Second bolts are installed at the positions close to the corners on the top of the circuit control board. The bottom ends of the second bolts penetrate through the circuit control board and are threadedly installed on the inner wall of the machine body. The circuit control board is located above the installation plate.

[0015] Preferably, a machine cover is installed on the top of the machine body. First bolts are installed at the positions close to the corners on the top of the machine cover. The bottom ends of the first bolts penetrate through the machine cover and are threadedly installed on the top of the machine body.

[0016] Compared with the prior art, the beneficial effects of the present invention are:

[0017] 1. In the present invention, the staff can select different measurement methods according to the different terrains to be measured. When the ground is flat, the staff can place the machine body on the ground for use. The staff can place or move the machine body on the ground, and use a laser rangefinder to measure the length and distance. When there are slight slope undulations on the ground, when the staff measures the ground length, the spring makes the end of the installation sleeve with a polygonal outer wall accurately insert into the inside of the limit hole through its own elasticity. The limit hole and the limit rod cooperate with each other to provide good support and limit for the installation sleeve. The installation sleeve drives the rotating wheel to rotate on the ground through the first support plate, and measures the ground length of the engineering construction through the circumference of the rotating wheel and the number of turns on the ground. When in use, the four rotating wheels measure the ground length at the same time. After the measurement is completed, the error can be judged according to the measurement results of the four rotating wheels, making the ground measurement result of the project cost more accurate.

[0018] 2. When the terrain to be measured is relatively complex in the present invention, the rotating wheel is rotated to the lower part of the machine body. The clamping block can fix the position of the rotating wheel through the clamping groove, and the sliding hole, the limit rod and the installation groove can limit the position of the installation sleeve, making the rotating circle more stable when in use. The output shaft of the second motor drives the fan blade to rotate through the installation shaft, and drives the machine body to lift off and move. Then the terrain scanner can perform a linear scan on the terrain surface of the ground. When in use, the ground length and distance can be accurately measured according to the overall length of the scanned terrain surface curve. When measuring, the fan blade inside the rotating wheel drives the machine body to lift off, which can prevent the different undulation degrees of the ground from affecting the measurement process of the measuring device, making the measuring device have no terrain restrictions when measuring the ground length.

[0019] 3. When the installation sleeve and the installation shaft inside it are in use, due to the changes in rotation and installation positions, the connection between the installation sleeve and the installation shaft is adjusted, and the connection method of the installation sleeve and the installation shaft for the support and transmission of the rotating wheel is adjusted. When the rotating wheel rotates on the ground, the fan blade will also rotate following the rotating wheel due to the friction between the installation shaft and the installation sleeve. The first support plate and the second support plate can protect the fan blade, so that the fan blade will not affect the rotational measurement of the rotating wheel. When the machine body is flying for measurement, the position of the rotating wheel is fixed, which will not affect the rotation of the fan blade either. And the rotating wheel can protect the fan blade. When used in different installation positions and transmission methods, they can cooperate with each other and will not interfere with each other. The rotating wheel will be adjusted to different positions according to different measurement methods during use and used in different ways, making the rotating wheel play different roles in different positions.

[0020] 4. In the present invention, the spring pushes the limiting rod to move towards the body by its own elasticity, and drives the end of the mounting sleeve with a polygonal outer wall to accurately insert into the limiting hole through the limiting rod. The bottom end of the rotating wheel abuts against the ground and is perpendicular to the ground. The limiting hole and the limiting rod cooperate with each other to provide good support and limitation for the mounting sleeve, preventing the mounting sleeve from rotating during use. At the same time, during use, the spring pushes the mounting sleeve through the limiting rod by its own elasticity in real time, preventing the end of the mounting sleeve away from the rotating wheel from moving out of the limiting hole when the rotating wheel rotates on the ground. When the rotating wheel is adjusted in position due to different measurement methods, the connecting cylinder can support and position the mounting sleeve and the rotating wheel at different positions. BRIEF DESCRIPTION OF THE DRAWINGS

[0021] Figure 1 is a perspective view of a high-precision engineering cost length measuring instrument proposed by the present invention;

[0022] Figure 2 is a schematic structural diagram of the circuit control board installation of a high-precision engineering cost length measuring instrument proposed by the present invention;

[0023] Figure 3 is a sectional view of the body of a high-precision engineering cost length measuring instrument proposed by the present invention;

[0024] Figure 4 is a schematic structural diagram of the rotating wheel installation of a high-precision engineering cost length measuring instrument proposed by the present invention;

[0025] Figure 5 is a schematic structural diagram of the bottom of the body of a high-precision engineering cost length measuring instrument proposed by the present invention;

[0026] Figure 6 is a schematic structural diagram of the rotating wheel of a high-precision engineering cost length measuring instrument proposed by the present invention;

[0027] Figure 7 is a sectional view of the mounting sleeve of a high-precision engineering cost length measuring instrument proposed by the present invention;

[0028] Figure 8 is a schematic structural diagram of the mounting sleeve of a high-precision engineering cost length measuring instrument proposed by the present invention;

[0029] Figure 9 is a schematic structural diagram of the mounting sleeve of a high-precision engineering cost length measuring instrument proposed by the present invention.

[0030] In the figure: 1, the body; 2, the machine cover; 3, the protective groove; 4, the rotating wheel; 5, the fixing hole; 6, the mounting plate; 7, the bottom hole; 8, the laser rangefinder; 9, the circuit control board; 10, the first bolt; 11, the second bolt; 12, the first motor; 13, the second motor; 14, the placement groove; 15, the clamping block; 16, the connecting cylinder; 17, the rotating rod; 18, the groove; 19, the electromagnetic inductor; 20, the clamping groove; 21, the mounting sleeve; 22, the first support plate; 23, the second support plate; 24, the fan blade; 25, the mounting shaft; 26, the fixing plate; 27, the rotating block; 28, the mounting groove; 29, the magnet block; 30, the limiting rod; 31, the spring; 32, the connecting groove; 33, the sliding hole; 34, the limiting hole; 35, the placement hole; 36, the terrain scanner. Detailed implementation manner

[0031] Next, the technical solutions in the embodiments of the present invention will be clearly and completely described in conjunction with 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.

[0032] In the description of the present invention, it should be understood that the orientation or positional relationship indicated by the terms "upper", "lower", "front", "rear", "left", "right", "top", "bottom", "inner", "outer", etc. is based on the orientation or positional relationship shown in the accompanying drawings, and is only for the convenience of describing the present invention and simplifying the description, rather than indicating or implying that the device or element referred to must have a specific orientation, be constructed and operated in a specific orientation, and therefore should not be construed as a limitation of the present invention.

[0033] Refer to Figures 1-9 , a high-precision length measuring instrument for engineering cost, including a body 1. Rotating wheels 4 are installed on both sides of the body 1 near the corners. Protective grooves 3 are opened on both sides of the bottom of the body 1 in the length direction. Connecting cylinders 16 are rotatably installed on the inner walls at both ends of the protective groove 3. A mounting sleeve 21 is slidably installed inside the connecting cylinder 16. A mounting shaft 25 is rotatably installed inside the mounting sleeve 21. One end of the mounting shaft 25 far from the connecting cylinder 16 penetrates through the mounting sleeve 21. A polygonal connecting groove 32 is opened at one end of the mounting shaft 25 located inside the connecting cylinder 16. A plurality of first support plates 22 are installed on the outer wall of the mounting sleeve 21 far from the connecting cylinder 16. One end of the first support plate 22 far from the mounting sleeve 21 is installed on one side of the inner wall of the rotating wheel 4 close to the body 1.

[0034] As a technical optimization solution of the present invention, a sliding hole 33 is opened at the top end of the outer wall of the connecting cylinder 16 in the length direction, an installation groove 28 is opened at the bottom end of the outer wall of the connecting cylinder 16 near one end of the rotating wheel 4 in the length direction, placing holes 35 are opened on both outer walls of the connecting cylinder 16, limiting rods 30 are installed on both outer walls of the installation sleeve 21, the limiting rods 30 are movably installed inside the placing holes 35, and a spring 31 is installed between the inner wall of one end of the placing hole 35 close to the rotating wheel 4 and the limiting rod 30; the spring 31 can push the installation sleeve 21 through its own elasticity, so that one end of the outer wall of the installation sleeve 21 with a polygonal shape is inserted into the polygonal limiting hole 34, and the limiting hole 34 and the limiting rod 30 cooperate with each other to support and limit the installation sleeve 21.

[0035] As a technical optimization solution of the present invention, a polygonal limiting hole 34 is opened on the inner wall of one end of the connecting cylinder 16 far from the rotating wheel 4, the outer wall of one end of the installation sleeve 21 far from the rotating wheel 4 is a polygonal outer wall, a rotating block 27 is installed at one end of the installation shaft 25 close to the rotating wheel 4, and a fixing plate 26 is rotatably installed on the outer wall of the rotating block 27; during use, the connecting cylinder 16 drives the rotating wheel 4 to rotate through the installation sleeve 21 and the first support plate 22, and drives the fixing plate 26 to rotate on the rotating block 27 through the second support plate 23.

[0036] As a technical optimization solution of the present invention, a plurality of second support plates 23 are installed on the outer wall of the fixing plate 26, one end of the second support plate 23 far from the fixing plate 26 is installed on one side of the inner wall of the rotating wheel 4 far from the first support plate 22, one end of the installation shaft 25 far from the connecting cylinder 16 is located between the fixing plate 26 and the installation sleeve 21, and a plurality of fan blades 24 are installed on the outer wall of one end of the installation shaft 25 far from the connecting cylinder 16; when the installation shaft 25 is connected to the rotating rod 17 through the connecting groove 32, the rotating rod 17 drives the fan blades 24 to rotate through the installation shaft 25.

[0037] As a technical optimization solution of the present invention, installation grooves 28 are opened on one side of a plurality of first support plates 22 close to the machine body 1, magnet blocks 29 are installed on the inner walls of the installation grooves 28, grooves 18 are opened at positions close to the corners on the side of the machine body 1, electromagnetic sensors 19 are installed on the inner walls of the grooves 18, and the electromagnetic sensors 19 are located on the side of the magnet blocks 29; when the rotating wheel 4 rotates, it drives the magnet block 29 to slide across the side of the machine body 1, and the electromagnetic sensor 19 can count the number of rotations of the rotating wheel 4 through the magnet block 29 sliding across its side.

[0038] As a technical optimization solution of the present invention, placing grooves 14 matching the rotating wheels 4 are formed on both sides of the bottom of the body 1. The placing grooves 14 communicate with the inside of the protection groove 3. A clamping block 15 is installed on the inner top of the placing groove 14. A plurality of clamping grooves 20 are formed on the side of the rotating wheel 4 close to the body 1. A polygonal rotating rod 17 matching the connecting groove 32 is rotatably installed on the inner top of the protection groove 3. The rotating rod 17 is located above the sliding hole 33. When the staff needs the body 1 to fly in the air, the bottom end of the rotating wheel 4 rotates into the inside of the placing groove 14, and the clamping block 15 can fix the position of the rotating wheel 4 through the clamping grooves 20, so that the rotating wheel 4 is horizontally installed at the bottom end of the body 1.

[0039] As a technical optimization solution of the present invention, second motors 13 are installed at positions close to the corners on the inner walls of both sides of the body 1. The output shafts of the second motors 13 are connected to the top ends of the rotating rods 17 through couplings. First motors 12 matching the connecting cylinders 16 are installed at positions close to the inner bottom on the inner walls of both sides of the body 1. The output shafts of the first motors 12 are connected to the ends of the connecting cylinders 16 far from the rotating wheels 4 through couplings. When in use, the first motor 12 can drive the mounting sleeve 21 and the mounting shaft 25 to rotate through the connecting cylinder 16, and the second motor 13 can drive the mounting shaft 25 to rotate.

[0040] As a technical optimization solution of the present invention, fixing holes 5 are formed on the inner walls of both ends of the body 1. Bottom holes 7 are formed on the inner bottom of the body 1. A mounting plate 6 is installed on the inner bottom of the body 1. Laser rangefinders 8 are installed at both ends of the mounting plate 6. The ends of the laser rangefinders 8 far from the mounting plate 6 are located on the sides of the fixing holes 5. A terrain scanner 36 is installed at the bottom of the mounting plate 6. The terrain scanner 36 is located inside the bottom hole 7. The rays emitted by the laser rangefinders 8 can measure the length of a specified distance by irradiating the distance, and the terrain scanner 36 can scan the terrain surface below when the body 1 is flying, and measure the length distance of the ground surface through the scanned terrain.

[0041] As a technical optimization solution of the present invention, a circuit control board 9 is installed inside the body 1. Second bolts 11 are installed at positions close to the corners on the top of the circuit control board 9. The bottom ends of the second bolts 11 penetrate through the circuit control board 9 and are threadedly installed on the inner wall of the body 1. The circuit control board 9 is located above the mounting plate 6. The circuit control board 9 is electrically connected to the laser rangefinders 8 and the terrain scanner 36 through the mounting plate 6, and is also electrically connected to the first motor 12 and the second motor 13, which is convenient for the staff to control the rotating wheels 4, the fan blades 24, the laser rangefinders 8 and the terrain scanner 36 through the circuit control board 9.

[0042] As a technical optimization solution of the present invention, a machine cover 2 is installed on the top of the machine body 1. At positions near the corners on the top of the machine cover 2, first bolts 10 are installed. The bottom ends of the first bolts 10 penetrate through the machine cover 2 and are threadedly installed on the top of the machine body 1. During use, the staff can install and disassemble the machine cover 2 through the first bolts 10, which is convenient for overhauling the inside of the machine body 1.

[0043] When the present invention is in use, the staff can select different measurement methods according to the different terrains to be measured. When the ground is flat, the staff can place and use the machine body 1 on the ground. During use, the staff installs the laser rangefinders 8 to be used at both ends of the mounting plate 6, and installs a circuit control board 9 inside the machine body 1, so that the circuit control board 9 is electrically connected to the laser rangefinders 8 through the mounting plate 6. At the same time, the circuit control board 9 is also connected to the first motor 12 and the second motor 13. When the staff needs to measure the length and distance through the laser rangefinders 8, the staff can place or move the machine body 1 on the ground so that the light beam irradiated by the laser rangefinders 8 can emit a laser beam in a specified direction through the fixing holes 5, measure the time difference between the laser beam from the transmitter to the object and then reflected back to the receiver, and then calculate the distance according to the speed of light and the time difference.

[0044] When it is necessary to measure the length and distance of a terrain with a slight slope, the staff can slidably install the mounting sleeve 21 inside the connecting cylinder 16, and by pulling the limiting rod 30, make the end of the mounting sleeve 21 with a polygonal outer wall correspond to the polygonal limiting hole 34 provided on the connecting cylinder 16. The spring 31 pushes the limiting rod 30 to move towards the direction close to the machine body 1 through its own elasticity, and drives the end of the mounting sleeve 21 with a polygonal outer wall to accurately insert into the inside of the limiting hole 34 through the limiting rod 30. The bottom end of the rotating wheel 4 abuts against the ground and is perpendicular to the ground. The cooperation between the limiting hole 34 and the limiting rod 30 can provide good support and limitation for the mounting sleeve 21, preventing the mounting sleeve 21 from rotating during use. At the same time, during use, the spring 31 pushes the mounting sleeve 21 through the limiting rod 30 in real time through its own elasticity, preventing the end of the mounting sleeve 21 away from the rotating wheel 4 from moving out of the inside of the limiting hole 34 when the rotating wheel 4 rotates on the ground.

[0045] During use, the output shaft of the first motor 12 drives the connecting cylinder 16 to rotate. The connecting cylinder 16 drives the mounting sleeve 21 to rotate through one end of the polygonal outer wall of the mounting sleeve 21 and the limiting rod 30, and the mounting sleeve 21 drives the rotating wheel 4 to rotate on the ground through the first support plate 22. When the rotating wheel 4 rotates, it can drive the fixing plate 26 to rotate on the rotating block 27 through the second support plate 23, making the rotating wheel 4 more stable during rotation. At the same time, the first support plate 22 and the second support plate 23 can provide good protection for the fan blade 24 inside the rotating wheel 4, preventing external personnel or objects from colliding with the fan blade 24.

[0046] When the rotating wheel 4 rotates on the ground, the first support plate 22 that moves above the mounting sleeve 21 as the rotating wheel 4 rotates will slide past the side of the electromagnetic inductor 19 on the side of the body 1. Since the magnet block 29 is installed on the side of the first support plate 22, when the first support plate 22 moves from the side of the body 1, the electromagnetic inductor 19 can sense the magnetic field of the magnet block 29 itself. When in use, the electromagnetic inductor 19 can count the number of rotations of the rotating wheel 4 by the number of magnet blocks 29 sliding past its side, and measure the ground length of the engineering construction based on the circumference of the rotating wheel 4 and the number of rotations on the ground. When in use, the four rotating wheels 4 measure the ground length simultaneously. After the measurement is completed, error judgment can be made based on the measurement results of the four rotating wheels 4, making the ground measurement result of the project cost more accurate.

[0047] The staff can install the terrain scanner 36 below the mounting plate 6, and the terrain scanner 36 is located inside the bottom hole 7. The bottom hole 7 can provide good protection for the terrain scanner 36 and also reduce the air resistance when the body 1 moves in the air. The staff can pull the rotating wheel 4, so that the rotating wheel 4 drives the limiting rod 30 through the mounting sleeve 21 to compress the spring 31. At the same time, one end of the mounting sleeve 21 with a polygonal outer wall moves out of the limiting hole 34. At the same time, the staff rotates the rotating wheel 4 and the mounting sleeve 21 so that the mounting sleeve 21 is perpendicular to the connecting cylinder 16, and the mounting sleeve 21 is simultaneously located inside the sliding hole 33 and the mounting groove 28 and abuts against the inner walls of the sliding hole 33 and the mounting groove 28. During use, the polygonal connecting groove 32 at one end of the mounting shaft 25 away from the rotating wheel 4 is connected to the polygonal rotating rod 17. At the same time, the bottom end of the rotating wheel 4 rotates into the placement groove 14, and the clamping block 15 on the inner wall of the placement groove 14 is located inside the card slot 20 on the outer wall of the rotating wheel 4. During use, the clamping block 15 can fix the position of the rotating wheel 4 through the card slot 20, and the sliding hole 33, the limiting rod 30, and the mounting groove 28 can limit the position of the mounting sleeve 21 to prevent the mounting sleeve 21 from rotating during use. The rotating rod 17 is connected to the mounting shaft 25 inside the mounting sleeve 21.

[0048] The second motor 13 drives the mounting shaft 25 inside the mounting sleeve 21 to rotate through the output shaft, and one end of the mounting shaft 25 located between the mounting sleeve 21 and the fixing plate 26 can drive a plurality of fan blades 24 to rotate inside the rotating wheel 4, so that the air flow above the body 1 quickly flows downward to the body 1 through the rotation of the fan blades 24, and drives the body 1 to lift off and move. When the body 1 moves in the air, the terrain scanner 36 can perform a linear scan on the terrain surface of the ground, and the length distance of the ground can be accurately measured according to the overall length of the scanned terrain surface curve during use. During use, the staff can select different measurement methods according to the different terrain of the measured engineering ground, and the measurement accuracy is more precise.

[0049] The above is only a preferred specific embodiment of the present invention, but the protection scope of the present invention is not limited thereto. Any person skilled in the art within the technical scope disclosed by the present invention, according to the technical solution and inventive concept of the present invention, makes equivalent substitutions or changes, and should be covered within the protection scope of the present invention.

Claims

1. A high-precision length measuring instrument for engineering cost, comprising a body (1), characterized in that, Rotating wheels (4) are installed on both sides of the body (1) near the corners. On both sides of the bottom of the body (1), protective grooves (3) are opened along the length direction. On the inner walls at both ends of the protective groove (3), connecting cylinders (16) are rotatably installed. Inside the connecting cylinder (16), a mounting sleeve (21) is slidably installed. Inside the mounting sleeve (21), a mounting shaft (25) is rotatably installed. One end of the mounting shaft (25) far from the connecting cylinder (16) penetrates through the mounting sleeve (21). At one end of the mounting shaft (25) located inside the connecting cylinder (16), a polygonal connecting groove (32) is opened. On the outer wall of the end of the mounting sleeve (21) far from the connecting cylinder (16), several first support plates (22) are installed. One end of the first support plate (22) far from the mounting sleeve (21) is installed on the inner wall of the rotating wheel (4) close to the body (1).

2. The high-precision engineering cost length measuring instrument according to claim 1, wherein On the top end of the outer wall of the connecting cylinder (16), a sliding hole (33) is opened along the length direction. On the bottom end of the outer wall of the connecting cylinder (16) close to the rotating wheel (4), a mounting groove (28) is opened along the length direction. On both outer walls of the connecting cylinder (16), placing holes (35) are opened. On both outer walls of the mounting sleeve (21), limiting rods (30) are installed. The limiting rods (30) are movably installed inside the placing holes (35). A spring (31) is installed between the inner wall of the end of the placing hole (35) close to the rotating wheel (4) and the limiting rod (30).

3. The high-precision engineering cost length measuring instrument according to claim 2, characterized in that, On the inner wall of the end of the connecting cylinder (16) far from the rotating wheel (4), a polygonal limiting hole (34) is opened. The outer wall of the end of the mounting sleeve (21) far from the rotating wheel (4) is a polygonal outer wall. At one end of the mounting shaft (25) close to the rotating wheel (4), a rotating block (27) is installed. On the outer wall of the rotating block (27), a fixing plate (26) is rotatably installed.

4. The high-precision engineering cost length measuring instrument according to claim 3, characterized in that, On the outer wall of the fixing plate (26), several second support plates (23) are installed. One end of the second support plate (23) far from the fixing plate (26) is installed on the inner wall of the rotating wheel (4) far from the first support plate (22). One end of the mounting shaft (25) far from the connecting cylinder (16) is located between the fixing plate (26) and the mounting sleeve (21). On the outer wall of the end of the mounting shaft (25) far from the connecting cylinder (16), several fan blades (24) are installed.

5. The high-precision engineering cost length measuring instrument according to claim 1, characterized in that, On the side of several first support plates (22) close to the body (1), mounting grooves (28) are opened. On the inner wall of the mounting groove (28), magnet blocks (29) are installed. On the side of the body (1) near the corner, a groove (18) is opened. On the inner wall of the groove (18), an electromagnetic inductor (19) is installed. The electromagnetic inductor (19) is located on the side of the magnet block (29).

6. The high-precision engineering cost length measuring instrument according to claim 1, characterized in that, Both sides of the bottom of the body (1) are provided with placement grooves (14) that match the rotating wheels (4). The placement grooves (14) communicate with the inside of the protection groove (3). A clamping block (15) is installed on the inner top of the placement groove (14). A number of clamping grooves (20) are provided on one side of the rotating wheel (4) close to the body (1). A polygonal rotating rod (17) that matches the connection groove (32) is rotatably installed on the inner top of the protection groove (3). The rotating rod (17) is located above the sliding hole (33).

7. The high-precision engineering cost length measuring instrument according to claim 2, characterized in that, Second motors (13) are installed at positions close to the corners on the inner walls of both sides of the body (1). The output shafts of the second motors (13) are connected to the top ends of the rotating rods (17) through couplings. First motors (12) that match the connection cylinders (16) are installed at positions close to the inner bottom on the inner walls of both sides of the body (1). The output shafts of the first motors (12) are connected to one ends of the connection cylinders (16) far from the rotating wheels (4) through couplings.

8. The high-precision engineering cost length measuring instrument according to claim 1, characterized in that Fixing holes (5) are provided on the inner walls at both ends of the body (1). A bottom hole (7) is provided on the inner bottom of the body (1). A mounting plate (6) is installed on the inner bottom of the body (1). Laser rangefinders (8) are installed at both ends of the mounting plate (6). One ends of the laser rangefinders (8) far from the mounting plate (6) are located on the sides of the fixing holes (5). A terrain scanner (36) is installed at the bottom of the mounting plate (6). The terrain scanner (36) is located inside the bottom hole (7).

9. The high-precision engineering cost length measuring instrument according to claim 8, characterized in that, A circuit control board (9) is installed inside the body (1). Second bolts (11) are installed at positions close to the corners on the top of the circuit control board (9). The bottom ends of the second bolts (11) penetrate through the circuit control board (9) and are threadedly installed on the inner wall of the body (1). The circuit control board (9) is located above the mounting plate (6).

10. A high-precision engineering cost length measuring instrument according to claim 1, characterized in that, A machine cover (2) is installed on the top of the body (1). First bolts (10) are installed at positions close to the corners on the top of the machine cover (2). The bottom ends of the first bolts (10) penetrate through the machine cover (2) and are threadedly installed on the top of the body (1).

Images