Electromagnetic wave distance measuring device for constructional engineering

Abstract

The invention discloses a constructional engineering electromagnetic wave distance measuring device which comprises a bearing plate and an adjusting plate, the adjusting plate is located above the bearing plate, adjusting columns are movably installed on the top of the bearing plate in the front, back, left and right directions, a distance measuring instrument is arranged on the top of the adjusting plate, and three upper supporting legs are annularly, evenly and movably hinged to the bottom of the bearing plate. The bottom of the upper supporting leg is movably sleeved with a lower supporting leg, a fixing cylinder is fixedly installed in the middle of the bottom face of the bearing plate, the bottom of the fixing cylinder is fixedly connected with an adjusting cylinder, the bottom of the adjusting cylinder is slidably sleeved with an adjusting rod, a guide pipe is connected between the side wall of the upper supporting leg and the side wall of the fixing cylinder, and a switch mechanism is arranged on the fixing cylinder. The bottom of the upper supporting leg is sleeved with the lower supporting leg, hydraulic adjustment can be conducted in cooperation with the fixing cylinder and the adjusting cylinder, the detection cavity is formed in the adjusting plate and provided with the levelness detection mechanism, the tripod can be rapidly adjusted, the levelness is guaranteed, and meanwhile the threaded ring is arranged to adjust the pull rope to guarantee the stability of the tripod.

Description

Technical Field

[0001] The present application relates to the technical field of engineering measurement equipment, and in particular to an electromagnetic wave distance measuring device for construction engineering. Background Art

[0002] Before construction, the site needs to be measured. In the past, manual measurement was used, but now with the development of various distance measuring equipment, the electromagnetic wave rangefinder is a commonly used distance measuring device. It is an instrument for measuring distance with electromagnetic waves as carrier waves. The main distance measuring methods are pulse distance measurement and phase distance measurement. The principle is to transmit the wave and then reflect it back through the prism, and then calculate the distance between the two points by time difference or phase difference. Because it is used in construction projects, it is usually on the construction site, so a tripod combination electromagnetic wave rangefinder is needed. However, the existing combined distance measuring device has certain shortcomings: Firstly, tripods are generally retractable, but they need to be pulled out section by section and fixed in a suitable position when in use, and due to the uneven ground, they need to be adjusted and calibrated at the same time, which is a waste of time overall; secondly, since the horizontality needs to be ensured when using electromagnetic wave ranging, it is difficult to achieve the required horizontality by directly adjusting the three legs of the tripod, and it is inconvenient to adjust with the help of other leveling equipment, which makes the entire rangefinder difficult to adjust when in use; at the same time, each leg of the tripod can be rotated outward, so when the legs are stretched to different lengths, the center of gravity of the tripod as a whole also changes, and the existing ones all use a hoop to limit the angle of the three legs to be stretched outward, which results in too large a change in the center of gravity at different heights, affecting the overall stability and thus affecting the measurement accuracy. Summary of the invention

[0003] The present application proposes an electromagnetic wave ranging device for construction engineering, which has the advantages of convenient adjustment and high stability, and is used to solve the problems raised by the background technology.

[0004] To achieve the above-mentioned purpose, the present application adopts the following technical scheme: an electromagnetic wave ranging device for construction engineering, comprising a bearing plate and an adjusting plate, the adjusting plate being located above the bearing plate, and an adjusting column is movably installed on the top of the bearing plate in four directions of front, back, left and right, and the top of the adjusting column is connected to the bottom of the adjusting plate, a rangefinder is arranged on the top of the adjusting plate, the bottom of the bearing plate is annularly and evenly movably hinged with three upper legs, the bottom of the upper legs is movably sleeved with lower legs, a fixed cylinder is fixedly installed on the middle part of the bottom surface of the bearing plate, an adjusting cylinder is fixedly connected to the bottom of the fixed cylinder, an adjusting rod is slidably sleeved on the bottom of the adjusting cylinder, a hydraulic groove is opened in the middle part of the fixed cylinder, and the bottom of the hydraulic groove is connected to the inner cavity of the adjusting cylinder, a conduit is connected between the side wall of the upper leg and the side wall of the fixed cylinder, a switch swivel is rotatably sleeved inside the hydraulic groove, and a switch mechanism is arranged on the top of the switch swivel.

[0005] Furthermore, a telescopic hole is provided inside the upper leg, and the top of the lower leg is slidably sleeved inside the telescopic hole, a guide hole is provided on the side of the fixed cylinder corresponding to the position of the upper leg, the conduit connects the telescopic hole and the guide hole, and the side wall of the switch rotating ring is evenly provided with three guide holes in a ring shape, and the central axis of the guide hole and the central axis of the guide hole are on the same horizontal plane, and the telescopic hole, the hydraulic groove and the inner cavity of the adjusting cylinder are filled with hydraulic oil or other non-compressible liquid media.

[0006] Furthermore, the switch mechanism consists of a connecting ring, a limit block and an adjusting swivel. The connecting ring is rotatably sleeved inside the fixed cylinder, and the bottom of the connecting ring is fixedly connected to the top of the switch swivel. The outer ring of the fixed cylinder located at the top of the connecting ring is symmetrically provided with limit grooves. The outer ring of the connecting ring is fixedly connected to the limit block at the limit groove, and the outer rings of the two limit blocks are fixedly sleeved with adjusting swivels.

[0007] Furthermore, a rotating support block is fixedly connected to the bottom of the adjustment plate, a circular groove is provided in the middle of the top surface of the bearing plate, and the circular groove is adapted to the bottom of the rotating support block, and adjustment grooves are evenly provided in four directions of front, back, left and right on the top of the bearing plate, the bottom sliding sleeve of the adjustment column is inside the adjustment groove, a micro hydraulic cylinder is provided inside the bearing plate on one side of the bottom of the adjustment groove, and the oil port of the micro hydraulic cylinder is connected to the bottom of the adjustment groove.

[0008] Furthermore, the interior of the adjustment plate is evenly and symmetrically provided with a detection cavity in four directions of front, back, left and right. A fixed magnetic block is fixedly installed at one end of the detection cavity away from the center of the adjustment plate, and a pressure sensor is arranged at one end of the detection cavity close to the center of the adjustment plate. A sliding magnetic block is slidably sleeved inside the detection cavity, and the friction coefficient between the smooth inner wall of the detection cavity and the sliding magnetic block is small.

[0009] Furthermore, the sliding magnetic block and the fixed magnetic block are magnetic, and the magnetic poles at opposite ends are the same. A power supply and a controller are also provided inside the rotating support block. The micro hydraulic cylinder and the pressure sensor are linearly connected to the power supply and the controller through wires.

[0010] Furthermore, the outer ring of the adjusting cylinder is provided with an external thread, the outer ring of the external thread is threadedly sleeved with a threaded ring, the side wall of the upper leg close to the adjusting cylinder is rotatably provided with a rotating shaft, the outer ring of the threaded ring is rotatably sleeved with a rotating ring, the outer ring of the rotating shaft is sleeved with a pull rope, and the other end of the pull rope is connected to the outer surface of the rotating ring.

[0011] The electromagnetic wave ranging device for construction engineering provided by the present application can be adjusted hydraulically by sleeve-fitting the lower leg at the bottom of the upper leg and cooperating with the fixing tube and the adjusting tube. Compared with the prior art, the adjustment rod is used to adjust the hydraulic pressure inside the adjusting tube and transmit it to the telescopic hole through the fixing tube and the conduit to achieve the adjustment of the lower leg. In this way, only one-time hydraulic pressure is needed to extend the lower leg in the future. After that, the tripod is placed on the ground, and the overall telescopic adjustment of the lower leg can be completed by pressing the bearing plate according to the tilt condition, which is more convenient and quick. By arranging an adjustment plate on the bearing plate, and opening a detection cavity inside the adjustment plate to set a horizontal detection mechanism, and adjusting with the adjustment column between the bearing plate and the adjustment plate, compared with the prior art, the magnetic force inside the detection cavity in four directions is used to cooperate with the change of the pressure sensor detection force, so as to feedback the change of the inclination, and then the micro hydraulic cylinder is controlled by the controller to adjust the hydraulic pressure inside the adjustment groove to achieve fine adjustment of the adjustment column, so that the overall level can be further accurately adjusted; A threaded ring is connected to the outer circle thread sleeve of the adjustment tube, and a pull rope is connected to the outer circle of the threaded ring through a rotating ring to limit the upper legs. Compared with the prior art, the threaded ring can be adjusted according to the actual height of the tripod or the extension of the lower legs to ensure that the pull rope can limit the three upper legs to be spread to the most stable position. In this way, the tripod is more difficult to fall down when used for distance measurement, and the safety of the rangefinder is further guaranteed. BRIEF DESCRIPTION OF THE DRAWINGS

[0012] The accompanying drawings, which constitute a part of the specification, illustrate embodiments disclosed in the present application and, together with the description, serve to explain the principles disclosed in the present application.

[0013] The present disclosure may be more clearly understood from the following detailed description with reference to the accompanying drawings, in which: Figure 1 It is a schematic diagram of the overall structure of the present invention; Figure 2 It is a schematic diagram of another viewing angle of the overall structure of the present invention; Figure 3It is a front view of the overall structure of the present invention; Figure 4 for Figure 3 Middle AA section; Figure 5 for Figure 3 Middle BB section; Figure 6 for Figure 3 Middle CC section; Figure 7 A half-section view of the overall structure of the frame of the present invention; Figure 8 It is a schematic diagram of the switch mechanism structure of the present invention; Fig. 9 for Figure 6 Enlarged view of point D in the middle; Fig.10 for Figure 7 Enlarged view of point E in the middle.

[0014] Among them: 1. bearing plate; 101. adjustment groove; 2. adjustment plate; 201. detection cavity; 3. rangefinder; 4. upper leg; 401. telescopic hole; 5. lower leg; 6. adjustment column; 7. fixed cylinder; 701. hydraulic groove; 702. guide hole; 703. limit groove; 8. adjustment cylinder; 801. external thread; 9. adjustment rod; 10. guide tube; 11. switch swivel; 1101. guide hole; 12. connecting ring; 13. limit block; 14. adjustment swivel; 15. rotating support block; 1501. power supply; 1502. controller; 16. micro hydraulic cylinder; 17. fixed magnet; 18. sliding magnet; 19. pressure sensor; 20. threaded ring; 21. rotating shaft; 22. rotating ring; 23. pull rope. DETAILED DESCRIPTION

[0015] The following will be combined with the drawings in the embodiments of the present application to clearly and completely describe the technical solutions in the embodiments of the present application. Obviously, the described embodiments are only part of the embodiments of the present application, not all of the embodiments. Based on the embodiments in the present application, all other embodiments obtained by ordinary technicians in this field without creative work are within the scope of protection of this application.

[0016] See also Figure 1-Figure 10An electromagnetic wave distance measuring device for construction engineering includes a bearing plate 1 and an adjusting plate 2. The adjusting plate 2 is located above the bearing plate 1, and an adjusting column 6 is movably installed on the top of the bearing plate 1 in four directions of front, back, left, and right, and the top of the adjusting column 6 is connected to the bottom of the adjusting plate 2. The adjusting plate 2 can be moved on the top of the bearing plate 1 to achieve horizontal adjustment. The level of the adjusting plate 2 is fine-tuned by controlling the adjusting column 6. The adjustment angle range is generally not greater than ten degrees. A rangefinder 3 is arranged on the top of the adjusting plate 2. The bottom of the bearing plate 1 is annular and evenly movable and hinged with three upper legs 4. The bottom of the upper legs 4 is movably sleeved with lower legs 5. A fixed cylinder 7 is fixedly installed in the middle of the bottom surface of the bearing plate 1. The fixed cylinder 7 The bottom of the fixing cylinder 7 is fixedly connected with an adjustment cylinder 8, and the bottom of the adjustment cylinder 8 is slidably sleeved with an adjustment rod 9. When the adjustment rod 9 is extended to the maximum length at the bottom of the adjustment cylinder 8, it will not exceed the bottom position of the upper leg 4, which can avoid being too long and affecting the storage during the subsequent storage. A hydraulic groove 701 is opened in the middle of the fixing cylinder 7, and the bottom of the hydraulic groove 701 is connected with the inner cavity of the adjustment cylinder 8. A guide tube 10 is connected between the side wall of the upper leg 4 and the side wall of the fixing cylinder 7. The guide tube 10 is a hose, and its specific length can be selected according to the actual situation to adapt to different tripod situations. A switch ring 11 is rotatably sleeved inside the hydraulic groove 701, and a switch mechanism is set on the top of the switch ring 11. The fixing cylinder 7, the adjustment cylinder 8 and the adjustment rod 9 constitute an adjustment mechanism, which can realize the change of the elongation of the lower leg 5 at the bottom of the upper leg 4 through hydraulic adjustment when in use, and then control it in a fixed position to achieve a stable effect.

[0017] At the same time, a telescopic hole 401 is opened inside the upper leg 4, and the top of the lower leg 5 is slidably sleeved inside the telescopic hole 401, and one end of the lower leg 5 in the telescopic hole 401 is slidably sealed by a piston, and the end of the adjusting rod 9 is also slidably sealed in the inner cavity of the adjusting cylinder 8 by a piston, and a guide hole 702 is opened at the side of the fixed cylinder 7 corresponding to the position of the upper leg 4, and the conduit 10 connects the telescopic hole 401 and the guide hole 702, and the side wall of the switch rotating ring 11 is annularly and evenly opened with three guide holes 1101, and the guide hole 1 The central axis of 101 and the central axis of the guide hole 702 are on the same horizontal plane. The guide hole 1101 is trumpet-shaped, and the end opening has the same cross-section as the guide hole 702, so that the hydraulic pressure can flow easily. At the same time, the upper and lower ends and the outer ring of the switch ring 11 are tightly fitted with the inner wall of the hydraulic groove 701, so that when the switch ring 11 rotates, it can ensure that the same sealing effect as the piston is achieved. The telescopic hole 401, the hydraulic groove 701 and the inner cavity of the adjusting cylinder 8 are filled with hydraulic oil or other non-compressible liquid media.

[0018] The telescopic hole 401 is connected to the guide hole 702 through the conduit 10, thereby connecting to the inside of the hydraulic groove 701. In addition, the hydraulic groove 701 itself is connected to the inner cavity of the adjusting cylinder 8, so that the communication between the telescopic hole 401 and the inner cavity of the adjusting cylinder 8 is realized, and hydraulic oil is contained therein. In this way, as long as the sliding adjustment rod 9 realizes the change of the hydraulic oil in the inner cavity of the adjusting cylinder 8, the hydraulic oil in the telescopic hole 401 can be driven to change, thereby driving the telescopic length of the lower leg 5 at the bottom of the upper leg 4 to change. However, when it is generally used, the lower leg 5 is first completely slid out of the telescopic hole 401, and then the total length of each leg is adjusted according to the undulation of the ground. At the same time, a switch ring 11 is added to control the communication between the guide hole 702 and the hydraulic groove 701. When the switch ring 11 is rotated by the switch mechanism, the guide hole 1101 will be driven to rotate open, so that the guide hole 702 and the hydraulic groove 701 cannot be connected, which has the effect of closing the switch, and can also have a stabilizing effect after hydraulic adjustment.

[0019] The switch mechanism is composed of a connecting ring 12, a limiting block 13 and an adjusting swivel 14. The connecting ring 12 is rotatably sleeved inside the fixed cylinder 7, and the bottom of the connecting ring 12 is fixedly connected to the top of the switch swivel 11. The thickness of the connecting ring 12 is less than that of the switch swivel 11, and the bottom is connected to the middle circle position of the top surface of the switch swivel 11, so that it can effectively avoid contact with the hydraulic oil in the hydraulic groove 701. The outer ring of the fixed cylinder 7 located at the top of the connecting ring 12 is symmetrically provided with limiting grooves 703. The outer ring of the connecting ring 12 is located at the limiting groove 703 and fixedly connected with the limiting block 13. There are two limiting grooves 703, and the limiting blocks 13 are set inside to limit and slide. The sliding of the limiting blocks 13 inside the limiting grooves 703 can drive the connecting ring 12 and the switch swivel 11 to rotate, so that the guide hole 1101 is rotated and no longer affects its guide hole 70 2. In this way, the whole plays the role of a switch. At the same time, the maximum rotation angle of the limit block 13 in the limit groove 703 is sixty degrees. Because the interval between the three guide holes 1101 is one hundred and twenty degrees, each time the limit block 13 is rotated to the maximum angle, the guide hole 1101 is just rotated to the position between the two guide holes 702, which achieves the best switch closing effect. The outer rings of the two limit blocks 13 are fixedly sleeved with an adjusting ring 14. The adjusting ring 14 is for facilitating the rotation of the limit block 13. Because the limit block 13 is arranged inside the limit groove 703, the limit block 13 can be driven to rotate by rotating the annular adjusting ring 14, and the adjusting ring 14 and the outer wall of the fixed tube 7 are in a rotatable sleeve relationship. Therefore, when using the tripod, the user can rotate the adjusting ring 14 to any position to achieve the rotation adjustment of the limit block 13.

[0020] See also Figure 4-Figure 10The bottom of the adjustment plate 2 is fixedly connected with a rotating support block 15, a circular groove is provided in the middle of the top surface of the carrier plate 1, and the circular groove is adapted to the bottom of the rotating support block 15, the rotating support block 15 is the rotating point when the adjustment plate 2 is horizontally adjusted compared with the carrier plate 1, and the bottom of the rotating support block 15 is a semi-circular sphere, the center of the sphere is the center of rotation during horizontal adjustment, and the top of the carrier plate 1 is evenly provided with adjusting grooves 101 in four directions, front, back, left, and right, the bottom sliding sleeve of the adjusting column 6 is inside the adjusting groove 101, and a micro-liquid is provided inside the carrier plate 1 at one side of the bottom of the adjusting groove 101 The micro-hydraulic cylinder 16 is connected to the bottom of the adjusting groove 101, and the hydraulic pressure change inside the adjusting groove 101 is controlled by the micro-hydraulic cylinder 16. In this way, when working, the micro-hydraulic cylinders 16 at different positions are controlled by the controller 1502 to increase or decrease the hydraulic pressure of the adjusting groove 101, thereby driving the telescopic control of the adjusting column 6, and then driving the horizontality of the adjusting plate 2 to change. At the same time, the adjusting column 6 is arc-shaped, and the telescopic control is in the adjusting groove 101, and the center of its rotation is the same as the center of the semicircular sphere at the bottom of the rotating support block 15, so that a precise adjustment effect can be achieved.

[0021] The adjusting plate 2 has detection cavities 201 evenly and symmetrically arranged in four directions, front, back, left, and right. A fixed magnetic block 17 is fixedly installed at one end of the detection cavity 201 away from the center of the adjusting plate 2. A pressure sensor 19 is arranged at one end of the detection cavity 201 close to the center of the adjusting plate 2. A sliding magnetic block 18 is slidably sleeved inside the detection cavity 201. The friction coefficient between the smooth inner wall of the detection cavity 201 and the sliding magnetic block 18 is small, and the small friction coefficient can avoid the influence of friction. At the same time, an insulating layer is also arranged inside the detection cavity 201 to avoid the influence of external magnetism or electricity on the magnetic force inside the detection cavity 201, which leads to inaccurate detection and adjustment of the levelness. At the same time, a gap is left between the sliding magnetic block 18 and the inner wall of the detection cavity 201.

[0022] Among them, the sliding magnet 18 and the fixed magnet 17 are magnetic, and the magnetic poles at the opposite ends are the same, so that there is a magnetic repulsion between the sliding magnet 18 and the fixed magnet 17, and the magnetic repulsion can prevent the fixed magnet 17 from contacting the sliding magnet 18. Even if the entire tripod is laid down, the magnetic repulsion can still make the sliding magnet 18 float at the top of the fixed magnet 17 without contact. A power supply 1501 and a controller 1502 are also provided inside the rotating support block 15. The micro hydraulic cylinder 16 and the pressure sensor 19 are linearly connected to the power supply 1501 and the controller 1502 through wires. The power supply 1501 is The micro hydraulic cylinder 16 and the pressure sensor 19 are powered, but are provided with a switch to avoid wasting electricity when not working. Thus, when the tripod is in use, the fixed magnetic blocks 17 at the four positions on the top of the adjustment plate 2 will slide inside the detection cavity 201 to a certain extent according to the horizontality. Because the tilt causes the component force of gravity to reduce a part of the magnetic repulsion, the pressure detected by the corresponding pressure sensor 19 changes. At this time, the hydraulic pressure is adjusted by the micro hydraulic cylinder 16 controlled by the position, and then the adjustment column 6 is controlled to perform telescopic adjustment to fine-tune the height of the adjustment plate 2 at its corresponding position.

[0023] However, it should be noted that each adjustment is made by controlling the micro-hydraulic cylinder 16 on both sides to adjust the corresponding adjusting column 6 at the same time to ensure that the horizontality adjustment is achieved in the two corresponding directions. At the same time, in order to achieve the above-mentioned influence on the adjusting column 6 in the other two directions during adjustment, a piston is provided at the bottom of the adjusting column 6. On the one hand, it has a sealing effect inside the adjusting groove 101. On the other hand, the piston and the adjusting column 6 are connected in a ball-hinged manner. The top of the adjusting column 6 and the bottom surface of the adjusting plate 2 can also be ball-hinged. This ensures that there will be no mutual influence and restriction during fine-tuning.

[0024] See also Figure 6 , Fig.10The outer ring of the adjusting cylinder 8 is provided with an external thread 801, and the outer ring of the external thread 801 is threadedly sleeved with a threaded ring 20. A rotating shaft 21 is rotatably provided on the side wall of the upper leg 4 close to the adjusting cylinder 8. The outer ring of the threaded ring 20 is rotatably sleeved with a rotating ring 22. The outer ring of the rotating shaft 21 is sleeved with a pull rope 23, and the other end of the pull rope 23 is connected to the outer surface of the rotating ring 22. By rotating the threaded ring 20 on the outer ring of the adjusting cylinder 8, it can be adjusted to different positions, and then the rotating ring 22 is driven to be at different height positions. The position of the rotating shaft 21 on the upper leg 4 is fixed, and the length of the pull rope 23 is also fixed. In this way, the angle of the upper leg 4 opening to the outside can be controlled by adjusting the thread of the threaded ring 20, that is, the center of gravity stability of the overall tripod is controlled, and the fixed hoop restriction in the prior art is avoided. In this way, when the tripod is adjusted to different heights, the angle of the legs can be controlled, and then the pull rope 23 is used to limit it, so as to achieve the best stability effect at the opening angle.

[0025] Working principle: Select the location to be measured, then take out the tripod. At this time, the switch ring 11 inside the fixed cylinder 7 keeps the guide hole 1101 connected with the diversion hole 702. Then, hold the adjusting rod 9 and compress it into the inside of the adjusting cylinder 8, so that the hydraulic pressure in the inner cavity of the adjusting cylinder 8 enters the hydraulic groove 701, and then enters the telescopic hole 401 through the guide hole 1101, the diversion hole 702 and the conduit 10, so that the lower leg 5 extends outward from the bottom of the upper leg 4 under the action of the hydraulic pressure. When the three lower legs 5 are almost extended, the compression of the adjusting rod 9 can be stopped; After that, the tripod is placed on the ground to be measured. Due to the unevenness of the ground, the tripod will be obviously tilted at this time. It is only necessary to press the bearing plate 1 at the high position of the tilt so that the corresponding bottom lower leg 5 is contracted to a certain extent into the telescopic hole 401. At the same time, the hydraulic oil will also flow back to the inner cavity of the adjusting cylinder 8 and make the adjusting rod 9 return to a certain displacement. In this way, by pressing the bearing plate 1, the whole frame can be made to reach the level of the naked eye. Then, the adjusting swivel 14 is rotated to drive the limit block 13 and the connecting ring 12 to rotate sixty degrees, and then drive the switch swivel 11 to rotate sixty degrees, so that the guide hole 1101 is turned away and no longer connected with the guide hole 702. In this way, the hydraulic pressure inside each telescopic hole 401 is closed to ensure the stability of the elongation of the lower leg 5. Then, the threaded ring 20 is adjusted so that the height of the rotating ring 22 also changes and the effect of tightening the pull rope 23 is achieved, that is, the tripod is in the best stable state. Then, the power switch is turned on, the micro hydraulic cylinder 16 and the pressure sensor 19 are all powered on, and then the pressure condition of the pressure sensor 19 detected by the sliding magnetic block 18 inside the detection chamber 201 is fed back to the controller 1502, and then the corresponding two micro hydraulic cylinders 16 are controlled to increase and reduce pressure according to the different pressures detected in the same relative direction, so as to achieve fine adjustment of the extension and contraction of the two relative adjustment columns 6 inside the adjustment groove 101, thereby driving the fine adjustment of the horizontality of the adjustment plate 2, so that the pressures detected by the pressure sensors 19 in the four directions are basically the same, that is, the horizontal stability is achieved, and at this time, the switch of the power supply 1501 is turned off, and the rangefinder 3 is used to perform electromagnetic wave ranging; At the same time, after the measurement is completed, it is only necessary to reversely rotate the adjusting ring 14 to drive the switch ring 11 to return to its original position. At this time, the guide hole 1101 connects the hydraulic groove 701 and the guide hole 702, and then pull the adjusting rod 9 outward at the bottom of the adjusting tube 8 to drive all the lower legs 5 to retract into the telescopic hole 401 to complete the retraction. Subsequently, the upper legs 4 are turned to the vertical position to complete the storage of the tripod.

Claims

1. An electromagnetic wave distance measuring device for construction engineering, characterized in that: The invention comprises a bearing plate (1) and an adjusting plate (2), wherein the adjusting plate (2) is located above the bearing plate (1), and an adjusting column (6) is movably mounted on the top of the bearing plate (1) in four directions, front, back, left, and right, and the top of the adjusting column (6) is connected to the bottom of the adjusting plate (2), and a distance meter (3) is arranged on the top of the adjusting plate (2), and the bottom of the bearing plate (1) is evenly and movably hinged with three upper legs (4) in a ring shape, and the bottom of the upper legs (4) is movably sleeved with lower legs (5), and the middle of the bottom surface of the bearing plate (1) is fixedly mounted with a A fixed cylinder (7) is provided, the bottom of the fixed cylinder (7) is fixedly connected to an adjusting cylinder (8), the bottom of the adjusting cylinder (8) is slidably sleeved with an adjusting rod (9), a hydraulic groove (701) is provided in the middle of the fixed cylinder (7), and the bottom of the hydraulic groove (701) is communicated with the inner cavity of the adjusting cylinder (8), a guide tube (10) is connected between the side wall of the upper leg (4) and the side wall of the fixed cylinder (7), a switch rotating ring (11) is rotatably sleeved inside the hydraulic groove (701), and a switch mechanism is provided on the top of the switch rotating ring (11).

2. The electromagnetic wave distance measuring device for construction engineering according to claim 1, characterized in that: The upper leg (4) is provided with a telescopic hole (401) inside, and the top of the lower leg (5) is slidably sleeved inside the telescopic hole (401). A guide hole (702) is provided on the side of the fixed cylinder (7) at a position corresponding to the upper leg (4). The conduit (10) communicates with the telescopic hole (401) and the guide hole (702). The side wall of the switch rotating ring (11) is evenly provided with three guide holes (1101) in an annular shape, and the central axis of the guide hole (1101) is on the same horizontal plane as the central axis of the guide hole (702). Hydraulic oil or other non-compressible liquid medium is contained in the inner cavity of the telescopic hole (401), the hydraulic groove (701) and the regulating cylinder (8).

3. The electromagnetic wave distance measuring device for construction engineering according to claim 2, characterized in that: The switch mechanism comprises a connecting ring (12), a limiting block (13) and an adjusting swivel (14); the connecting ring (12) is rotatably sleeved inside the fixing cylinder (7), and the bottom of the connecting ring (12) is fixedly connected to the top of the switch swivel (11); the outer ring of the fixing cylinder (7) located at the top of the connecting ring (12) is symmetrically provided with limiting grooves (703); the outer ring of the connecting ring (12) is fixedly connected to the limiting blocks (13) at the limiting grooves (703); and the outer rings of the two limiting blocks (13) are fixedly sleeved with adjusting swivels (14).

4. The electromagnetic wave distance measuring device for construction engineering according to claim 1, characterized in that: The bottom of the adjustment plate (2) is fixedly connected to a rotating support block (15); a circular groove is provided in the middle of the top surface of the bearing plate (1), and the circular groove is adapted to the bottom of the rotating support block (15); the top of the bearing plate (1) is evenly provided with adjustment grooves (101) in four directions, front, back, left, and right; the bottom sliding sleeve of the adjustment column (6) is inside the adjustment groove (101); a micro hydraulic cylinder (16) is provided inside the bearing plate (1) at one side of the bottom of the adjustment groove (101), and the oil port of the micro hydraulic cylinder (16) is connected to the bottom of the adjustment groove (101).

5. The electromagnetic wave distance measuring device for construction engineering according to claim 4, characterized in that: The adjusting plate (2) is provided with a detection cavity (201) evenly and symmetrically in four directions, front, back, left, and right. A fixed magnetic block (17) is fixedly mounted on one end of the detection cavity (201) away from the center of the adjusting plate (2). A pressure sensor (19) is provided on one end of the detection cavity (201) close to the center of the adjusting plate (2). A sliding magnetic block (18) is slidably sleeved on the inside of the detection cavity (201). The inner wall of the detection cavity (201) is smooth and has a small friction coefficient with the sliding magnetic block (18).

6. The electromagnetic wave distance measuring device for construction engineering according to claim 5, characterized in that: The sliding magnetic block (18) and the fixed magnetic block (17) are magnetic, and the magnetic poles at opposite ends are the same. A power supply (1501) and a controller (1502) are also provided inside the rotating support block (15). The micro hydraulic cylinder (16) and the pressure sensor (19) are linearly connected to the power supply (1501) and the controller (1502) via wires.

7. The electromagnetic wave distance measuring device for construction engineering according to claim 1, characterized in that: The outer ring of the adjusting cylinder (8) is provided with an external thread (801), the outer ring of the external thread (801) is threadedly sleeved with a threaded ring (20), a rotating shaft (21) is rotatably provided on the side wall of the upper leg (4) close to the adjusting cylinder (8), the outer ring of the threaded ring (20) is rotatably sleeved with a rotating ring (22), the outer ring of the rotating shaft (21) is sleeved with a pull rope (23), and the other end of the pull rope (23) is connected to the outer surface of the rotating ring (22).

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