A river ditch depth measuring device for land surveying and its usage method

Abstract

The present invention relates to the technical field of depth measurement, and discloses a river ditch depth measurement device for land surveying and mapping and its use method, including a floating board. A through circular groove is opened at the top of the floating board, and further includes: a wire winding roller, which is rotatably installed on the top of the floating board, and a connecting rope is wound around the wire winding roller; a detection component, which is arranged inside the circular groove, and the detection component is used to detect whether the connecting rope is skewed; a bottom-touching component, which is arranged below the floating board, and the bottom-touching component is also connected to the end of the connecting rope, and the bottom-touching component is used to detect whether it reaches the bottom of the river ditch; a correction component, which is used to correct the skewed connecting rope. The present invention can detect whether the connecting rope is skewed when measuring the depth of the river ditch, and automatically drive the floating board to move after detecting that the connecting rope is skewed, so as to make the connecting rope vertical, ensure the accuracy of the connecting rope length reading after the cylinder touches the bottom, and thus improve the accuracy of measuring the depth of the river ditch.

Description

Technical Field

[0001] The present invention relates to the technical field of depth measurement, and particularly relates to a river ditch depth measurement device for land surveying and mapping and a using method thereof. Background Art

[0002] Scouring and silting often occur in natural rivers, which are prone to water disasters and hinder the development of water conservancy. To meet the requirements of eliminating disasters and promoting benefits, appropriate measures must be taken to renovate the river channel. During the process of river channel renovation, it is necessary to survey various data of the river channel in advance, including measuring the depth of the river ditch in the river channel.

[0003] At present, although the river ditch depth measurement device for land surveying and mapping can measure the depth of the river ditch through a sounding weight, during the measurement, due to the flowing water in the river, the connecting rope on the sounding weight will be skewed, resulting in inaccurate measurement of the depth of the river ditch, reducing the measurement accuracy. Therefore, there is an urgent need to design a river ditch depth measurement device for land surveying and mapping. Summary of the Invention

[0004] The purpose of the present invention is to solve the problems existing in the prior art, and to propose a river ditch depth measurement device for land surveying and mapping and a using method thereof.

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

[0006] A river ditch depth measurement device for land surveying and mapping, including a floating board, a through circular groove is opened at the top of the floating board, and further includes:

[0007] A wire winding roller, the wire winding roller is rotatably installed on the top of the floating board, and a connecting rope is wound around the wire winding roller;

[0008] A detection component, the detection component is arranged inside the circular groove, and the detection component is used to detect whether the connecting rope is skewed;

[0009] A bottom-touching component, the bottom-touching component is arranged below the floating board, and the bottom-touching component is also connected to the end of the connecting rope, and the bottom-touching component is used to detect whether it reaches the bottom of the river ditch;

[0010] A correction component, the correction component is arranged on the floating board, and the correction component is used to correct the skewed connecting rope.

[0011] As a further technical solution of the present invention, the bottom-touching component includes: a cylinder body, the cylinder body is fixedly installed at the end of the connecting rope, and a first contact piece is fixed at the inner top of the cylinder body, a second contact piece is slidably arranged inside the cylinder body, and the second contact piece is located below the first contact piece.

[0012] As a further technical solution of the present invention, a chassis is horizontally arranged below the cylinder body, and a connecting rod is vertically and fixedly installed at the center of the top of the chassis. The top of the connecting rod is fixedly installed at the bottom of the second contact piece, and the surface of the connecting rod is slidably arranged in the inner wall of the bottom of the cylinder body through splines. A straight spring is sleeved on the surface of the connecting rod, and both ends of the two straight springs are respectively installed at the bottom of the second contact piece and the inner bottom of the cylinder body.

[0013] As a further technical solution of the present invention, a first motor is installed on the top of the floating plate, and the output shaft of the first motor is installed at the center of the end face of the wire winding roller. When the first contact piece and the second contact piece are in contact, radio waves can be emitted to control the first motor. A limiting plate is horizontally and fixedly installed on the top of the floating plate, and a through hole for the connecting rope to pass through is opened on the limiting plate.

[0014] As a further technical solution of the present invention, the detection component includes: a plurality of first spring rods, which are annularly and uniformly fixedly installed on the inner wall of the circular groove. The fixed end and the telescopic end of each first spring rod are slidably connected through splines, and an arc-shaped plate is vertically and fixedly installed at the telescopic end of each first spring rod. A copper block and a copper strip are respectively fixedly installed on the fixed end and the telescopic end of the first spring rod.

[0015] As a further technical solution of the present invention, the correction component includes: a large gear and a correction mechanism. The large gear is rotatably arranged below the floating plate, and a shaft rod that rotates at the bottom of the floating plate is fixedly installed at the center of the top of the large gear. A second motor connected to the shaft rod is installed on the top of the floating plate. There are a plurality of correction mechanisms, and the plurality of correction mechanisms are annularly and evenly distributed around the large gear.

[0016] As a further technical solution of the present invention, the correction mechanism includes: an impeller, which is rotatably arranged below the floating plate. An installation plate is rotatably installed on the side of the impeller, and the top of the installation plate is fixedly installed at the bottom of the floating plate. A second spring rod is fixedly installed on the side of the impeller away from the installation plate. The fixed end and the telescopic end of the second spring rod are slidably connected through splines. An electromagnet is fixedly sleeved on the surface of the fixed end of the second spring rod, and the corresponding electromagnet is electrically connected to the corresponding copper block and copper strip.

[0017] As a further technical solution of the present invention, a first bevel gear is fixedly installed at the telescopic end of the second spring rod, and a second bevel gear is meshed at the bottom of the first bevel gear. A small gear is fixedly installed at the bottom of the second bevel gear, and when the small gear and the large gear are in contact, the small gear and the large gear are meshed. A magnet disk is fixedly sleeved on the telescopic end of the second spring rod, and when the electromagnet is energized, it is magnetically repulsive to the magnet disk.

[0018] As a further technical solution of the present invention, an L-shaped frame is rotatably sleeved on the surface of the telescopic end of the second spring rod, and a rotating shaft is vertically and rotatably installed at the bottom of the horizontal side of the L-shaped frame. The end of the rotating shaft is fixedly installed at the center of the top of the second bevel gear. A chute is provided at the bottom of the floating plate, and a slider is slidably installed inside the chute. A fixed rod is vertically fixedly installed at the bottom of the slider, and the end of the fixed rod is fixedly installed at the top of the horizontal side of the L-shaped frame.

[0019] A method for using a river ditch depth measuring device for land surveying includes the following steps:

[0020] S1: First, place the floating plate on the liquid surface of the river ditch to be measured, and then start the first motor and the second motor. The second motor drives the shaft rod to rotate when it works, the shaft rod drives the large gear to rotate when it rotates, and the first motor drives the winding roller to rotate to realize the release of the connecting rope. As the connecting rope is released, the cylinder body and the chassis will move downward;

[0021] S2: When the chassis contacts the bottom of the river ditch, the cylinder body will continue to move downward. Then the cylinder body will drive the first contact piece to move downward, and further the first contact piece and the second contact piece can be made to contact. At this time, the first motor will stop working, and finally, the length of the released connecting rope is read;

[0022] S3: In addition, when the winding roller releases the connecting rope, due to the flowing water in the river ditch, the connecting rope will be skewed and not perpendicular to the winding roller. The skewed connecting rope will move the corresponding arc-shaped plate. The movement of the arc-shaped plate drives the telescopic end of the spring rod and the copper strip to move and causes the first spring rod to generate elastic force. Then the copper strip and the copper block will contact to make the electromagnet work. Since the magnetic disk and the working electromagnet are magnetically repulsive, after the electromagnet works, the magnetic disk will move away from the impeller. The movement of the magnetic disk drives the telescopic end of the second spring rod and the first bevel gear to move. The movement of the telescopic end of the second spring rod drives the L-shaped frame to move. The movement of the L-shaped frame drives the rotating shaft and the fixed rod to move. Due to the arrangement of the chute and the slider, the moving direction of the L-shaped frame is stable. The movement of the rotating shaft drives the second bevel gear and the small gear to move to realize the meshing of the small gear and the large gear. Further, the rotating large gear will drive the small gear to rotate. The rotation of the small gear drives the second bevel gear to rotate. The rotation of the second bevel gear drives the first bevel gear to rotate. The rotation of the first bevel gear drives the second spring rod to rotate. The rotation of the second spring rod drives the impeller to rotate. The rotation of the impeller will make the floating plate move towards the cylinder body to realize the perpendicularity between the winding roller and the connecting rope, ensure the accurate reading of the connecting rope after the cylinder body touches the bottom, and no additional manual operation is required throughout the process;

[0023] S4: As the floating plate moves, the connecting rope will become straight and no longer skewed. At this time, the connecting rope no longer exerts a force on the arc-shaped plate. Then the elastic force generated by the first spring rod will reset the arc-shaped plate, the copper block and the copper strip will no longer contact, and the corresponding small gear will also reset and no longer mesh with the large gear. In summary, the skewed state of the connecting rope can be automatically adjusted when measuring the depth of the river ditch.

[0024] The beneficial effects of the present invention are as follows:

[0025] First, in the present invention, through the arrangement of the correction component and the detection component, it is possible to detect whether the connecting rope is skewed when measuring the depth of the river ditch. Synchronously, after detecting that the connecting rope is skewed, the floating plate is automatically driven to move to make the connecting rope vertical, ensuring the accuracy of the length reading of the connecting rope after the cylinder touches the bottom, and thus improving the accuracy of measuring the depth of the river ditch;

[0026] Second, in the present invention, through the arrangement of the bottom-touching component, after the chassis touches the bottom of the river ditch, the first contact piece and the second contact piece can be made to contact and emit radio waves to control the first motor to stop working, avoiding the situation of excessive wire release of the connecting rope, and thus improving the effect of the device for measuring the depth of the river ditch. Description of the Drawings

[0027] Figure 1 is a schematic structural diagram of a river ditch depth measuring device for land surveying and mapping proposed by the present invention;

[0028] Figure 2 is a schematic bottom view structural diagram of a river ditch depth measuring device for land surveying and mapping proposed by the present invention;

[0029] Figure 3 is Figure 2 an enlarged schematic diagram of part A in

[0030] Figure 4 is a schematic sectional view structural diagram of the cylinder of a river ditch depth measuring device for land surveying and mapping proposed by the present invention;

[0031] Figure 5 is Figure 4 an enlarged schematic diagram of part B in

[0032] Figure 6 is a schematic structural diagram of a river ditch depth measuring device for land surveying and mapping proposed by the present invention after removing the floating plate;

[0033] Figure 7 is a schematic diagram of the impeller and its connection structure of a river ditch depth measuring device for land surveying and mapping proposed by the present invention;

[0034] Figure 8 is a schematic diagram of the second spring rod and its connection structure of a river ditch depth measuring device for land surveying and mapping proposed by the present invention.

[0035] In the figure: 1. Floating board; 2. Wire winding roller; 3. Connecting rope; 4. First motor; 5. Limiting plate; 6. Second motor; 7. Impeller; 8. Cylinder; 9. Chassis; 10. First contact piece; 11. Second contact piece; 12. Connecting rod; 13. Straight spring; 14. Slide groove; 15. Slide block; 16. Mounting plate; 17. First spring rod; 18. Arc-shaped plate; 19. Copper block; 20. Copper bar; 21. Large gear; 22. Shaft rod; 23. Second spring rod; 24. L-shaped frame; 25. Fixed rod; 26. First bevel gear; 27. Second bevel gear; 28. Small gear; 29. Rotating shaft; 30. Electromagnet; 31. Magnet disk. Detailed implementation manners

[0036] In order to make the technical means, creative features, achieved purposes and functions of the present invention easy to understand, the present invention will be further described below in conjunction with specific implementation manners.

[0037] The technical solutions in the embodiments of the present invention will be clearly and completely described below 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. Based on the embodiments of the present invention, all other embodiments obtained by those of ordinary skill in the art without creative efforts shall fall within the protection scope of the present invention.

[0038] Please refer to the attached Figure 1 - attached Figure 8 , a river ditch depth measuring device for land surveying, including a floating board 1. A through circular groove is opened at the top of the floating board 1. It further includes: a wire winding roller 2, a detection component, a bottom contact component and a correction component. The wire winding roller 2 is rotatably installed at the top of the floating board 1, and a connecting rope 3 is wound around the wire winding roller 2. The detection component is arranged inside the circular groove, and the detection component is used to detect whether the connecting rope 3 is skewed. The bottom contact component is arranged below the floating board 1, and the bottom contact component is also connected to the end of the connecting rope 3. The bottom contact component is used to detect whether it reaches the bottom of the river ditch. The correction component is arranged on the floating board 1, and the correction component is used to correct the skewed connecting rope 3;

[0039] The above can detect whether the connecting rope 3 is skewed when measuring the depth of the river ditch, and automatically drive the floating board 1 to move after detecting that the connecting rope 3 is skewed, so as to make the connecting rope 3 vertical, ensuring the accuracy of the length reading of the connecting rope 3 after the cylinder 8 touches the bottom.

[0040] Please refer to the attached Figure 1 - attached Figure 4, in a preferred embodiment, the bottom-touching component includes: a cylinder body 8, the cylinder body 8 is fixedly installed at the end of the connecting rope 3, and a first contact piece 10 is fixedly installed at the inner top of the cylinder body 8. A second contact piece 11 is slidably arranged inside the cylinder body 8, and the second contact piece 11 is located below the first contact piece 10. A chassis 9 is horizontally arranged below the cylinder body 8, and a connecting rod 12 is vertically and fixedly installed at the center of the top of the chassis 9. The top of the connecting rod 12 is fixedly installed at the bottom of the second contact piece 11, and the surface of the connecting rod 12 is slidably arranged inside the inner bottom wall of the bottom of the cylinder body 8 through a spline. A straight spring 13 is sleeved on the surface of the connecting rod 12, and both ends of the straight spring 13 are respectively installed at the bottom of the second contact piece 11 and the inner bottom of the cylinder body 8. A first motor 4 is installed at the top of the floating plate 1, and the output shaft of the first motor 4 is installed at the center of the end face of the winding roller 2. When the first contact piece 10 and the second contact piece 11 are in contact, radio waves can be emitted to control the first motor 4. A limiting plate 5 is horizontally and fixedly installed at the top of the floating plate 1, and a through hole for the connecting rope 3 to pass through is opened on the limiting plate 5;

[0041] Specifically, after the chassis 9 contacts the bottom of the river ditch, the cylinder body 8 will continue to move downward, then the cylinder body 8 will drive the first contact piece 10 to move downward, and further the first contact piece 10 and the second contact piece 11 can be brought into contact. At this time, the radio waves control the first motor 4 to stop working.

[0042] Please refer to the attached Figure 1 - attached Figure 6 , in a preferred embodiment, the detection component includes: a plurality of first spring rods 17, and the plurality of first spring rods 17 are fixedly installed on the inner wall of the circular groove in a uniformly annular manner. The fixed end and the telescopic end of each first spring rod 17 are slidably connected through a spline, and an arc-shaped plate 18 is vertically fixedly installed at the telescopic end of each first spring rod 17. A copper block 19 and a copper strip 20 are respectively fixedly installed at the fixed end and the telescopic end of the first spring rod 17;

[0043] Furthermore, when measuring the depth of the river ditch, since the water in the river ditch is flowing, it will cause the connecting rope 3 to be skewed and the winding roller 2 not to be perpendicular. The skewing of the connecting rope 3 will cause the corresponding arc-shaped plate 18 to move. The movement of the arc-shaped plate 18 drives the telescopic end of the spring rod and the copper strip 20 to move and causes the first spring rod 17 to generate an elastic force. Then the copper strip 20 and the copper block 19 will come into contact to make the electromagnet 30 work, thereby detecting whether the connecting rope 3 is skewed.

[0044] Please refer to the attached Figure 1 - attached Figure 8, in a preferred embodiment, the correction assembly includes: a large gear 21 and a correction mechanism. The large gear 21 is rotatably arranged below the floating plate 1, and a shaft rod 22 that rotates at the bottom of the floating plate 1 is fixedly installed at the center of the top of the large gear 21. A second motor 6 connected to the shaft rod 22 is installed on the top of the floating plate 1. There are multiple correction mechanisms, and the multiple correction mechanisms are evenly distributed in a ring around the large gear 21. The correction mechanism includes: an impeller 7. The impeller 7 is rotatably arranged below the floating plate 1. A mounting plate 16 is rotatably installed on the side of the impeller 7, and the top of the mounting plate 16 is fixedly installed at the bottom of the floating plate 1. A second spring rod 23 is fixedly installed on the side of the impeller 7 away from the mounting plate 16. The fixed end and the telescopic end of the second spring rod 23 are slidably connected by a spline. An electromagnet 30 is fixedly sleeved on the surface of the fixed end of the second spring rod 23. The corresponding electromagnet 30 is electrically connected to the corresponding copper block 19 and copper bar 20. A first bevel gear 26 is fixedly installed at the telescopic end of the second spring rod 23, and a second bevel gear 27 is engaged at the bottom of the first bevel gear 26. A small gear 28 is fixedly installed at the bottom of the second bevel gear 27, and when the small gear 28 contacts the large gear 21, the small gear 28 and the large gear 21 are engaged. A magnet disk 31 is fixedly sleeved on the telescopic end of the second spring rod 23, and after the electromagnet 30 is powered on, it is magnetically repulsive to the magnet disk 31. An L-shaped frame 24 is rotatably sleeved on the surface of the telescopic end of the second spring rod 23, and a rotating shaft 29 is vertically rotatably installed at the bottom of the horizontal side of the L-shaped frame 24. The end of the rotating shaft 29 is fixedly installed at the center of the top of the second bevel gear 27. A chute 14 is opened at the bottom of the floating plate 1, and a slider 15 is slidably installed inside the chute 14. A fixed rod 25 is vertically fixedly installed at the bottom of the slider 15, and the end of the fixed rod 25 is fixedly installed at the top of the horizontal side of the L-shaped frame 24;

[0045] Preferably, the rotation of the second spring rod 23 drives the rotation of the impeller 7. The rotation of the impeller 7 will move the floating plate 1 in the direction close to the cylinder 8, so as to make the verticality between the winding roller 2 and the connecting rope 3, ensuring the accurate reading of the connecting rope 3 after the cylinder 8 touches the bottom.

[0046] The working principle of the present invention: First, place the floating plate 1 on the liquid surface of the river ditch to be measured, and then start the first motor 4 and the second motor 6. The second motor 6 works to drive the shaft rod 22 to rotate, and the shaft rod 22 rotates to drive the large gear 21 to rotate. The first motor 4 works to drive the winding roller 2 to rotate, so as to realize the unwinding of the connecting rope 3. As the connecting rope 3 is unwound, the cylinder 8 and the chassis 9 will move downward;

[0047] When the chassis 9 contacts the bottom of the river ditch, the cylinder 8 will continue to move downward, then the cylinder 8 will drive the first contact piece 10 to move downward, and further the first contact piece 10 and the second contact piece 11 can be made to contact. At this time, the radio wave controls the first motor 4 to stop working, and finally the length of the connecting rope 3 unwound is read;

[0048] In addition, when the wire winding roller 2 pays out the connecting rope 3, the flowing water in the river ditch will cause the connecting rope 3 to skew and the wire winding roller 2 not to be perpendicular. The skew of the connecting rope 3 will cause the corresponding arc-shaped plate 18 to move. The movement of the arc-shaped plate 18 drives the telescopic end of the spring rod and the copper bar 20 to move and causes the first spring rod 17 to generate elastic force. Then, the copper bar 20 and the copper block 19 will come into contact to make the electromagnet 30 work. Since the magnet disk 31 and the working electromagnet 30 have mutually repulsive magnetism, after the electromagnet 30 works, it will cause the magnet disk 31 to move away from the impeller 7. The movement of the magnet disk 31 drives the telescopic end of the second spring rod 23 and the first bevel gear 26 to move. The movement of the telescopic end of the second spring rod 23 drives the L-shaped frame 24 to move. The movement of the L-shaped frame 24 drives the rotating shaft 29 and the fixed rod 25 to move. Due to the arrangement of the chute 14 and the slider 15, the moving direction of the L-shaped frame 24 is stable. The movement of the rotating shaft 29 drives the second bevel gear 27 and the small gear 28 to move, so as to realize the meshing of the small gear 28 and the large gear 21. Further rotation of the large gear 21 will drive the small gear 28 to rotate. The rotation of the small gear 28 drives the second bevel gear 27 to rotate. The rotation of the second bevel gear 27 drives the first bevel gear 26 to rotate. The rotation of the first bevel gear 26 drives the second spring rod 23 to rotate. The rotation of the second spring rod 23 drives the impeller 7 to rotate. The rotation of the impeller 7 will cause the floating plate 1 to move towards the cylinder 8, so as to make the wire winding roller 2 and the connecting rope 3 perpendicular, ensure the accurate reading of the connecting rope 3 after the cylinder 8 touches the bottom, and no additional manual operation is required throughout the process;

[0049] As the floating plate 1 moves, the connecting rope 3 will become straight and no longer skew. At this time, the connecting rope 3 no longer exerts a force on the arc-shaped plate 18. Then, the elastic force generated by the first spring rod 17 will cause the arc-shaped plate 18 to reset. The copper block 19 and the copper bar 20 will no longer be in contact, and the corresponding small gear 28 will also reset and no longer mesh with the large gear 21. In summary, the skew state of the connecting rope 3 can be automatically adjusted when measuring the depth of the river ditch, thereby improving the use effect of the device.

[0050] In addition, it should be understood that although this specification is described according to the embodiments, not every embodiment only contains an independent technical solution. This narrative way of the specification is only for clarity. Those skilled in the art should regard the specification as a whole, and the technical solutions in each embodiment can also be appropriately combined to form other embodiments that can be understood by those skilled in the art.

Claims

1. A river ditch depth measuring device for land surveying and mapping, comprising a floating plate (1), wherein a circular groove is provided on the top of the floating plate (1), and wherein: Also includes: A winding roller (2), the winding roller (2) being rotatably mounted on the top of the floating plate (1), and a connecting rope (3) being wound around the winding roller (2); A detection component, the detection component is arranged inside the circular groove, and the detection component is used to detect whether the connecting rope (3) is skewed; A bottoming component, the bottoming component is arranged below the floating plate (1), and the bottoming component is also connected to the end of the connecting rope (3), and the bottoming component is used to detect whether the bottom of the ditch has been reached; A correction component, the correction component being arranged on the floating plate (1) and being used to correct a skewed connecting rope (3); The detection assembly comprises: a first spring rod (17), wherein there are a plurality of the first spring rods (17), and the plurality of first spring rods (17) are evenly fixedly mounted on the inner wall of the circular groove in an annular shape, the fixed end and the telescopic end of each first spring rod (17) are slidably connected via a spline, and the telescopic end of each first spring rod (17) is vertically fixedly mounted with an arc plate (18), and the fixed end and the telescopic end of the first spring rod (17) are respectively fixedly mounted with a copper block (19) and a copper bar (20); The correction assembly comprises: a large gear (21) and a correction mechanism, the large gear (21) being rotatably arranged below the floating plate (1), and a shaft (22) being fixedly mounted at the top center of the large gear (21) and being rotatable at the bottom of the floating plate (1), a second motor (6) connected to the shaft (22) being mounted at the top of the floating plate (1), and a plurality of correction mechanisms being uniformly distributed in a ring shape around the large gear (21); The correction mechanism comprises: an impeller (7), the impeller (7) being rotatably arranged below the floating plate (1), a mounting plate (16) being rotatably mounted on the side of the impeller (7), and the top of the mounting plate (16) being fixedly mounted on the bottom of the floating plate (1), a second spring rod (23) being fixedly mounted on the side of the impeller (7) away from the mounting plate (16), and a fixed end and a telescopic end of the second spring rod (23) being slidably connected via a spline, an electromagnet (30) being fixedly sleeved on the surface of the fixed end of the second spring rod (23), and a corresponding electromagnet (30) being electrically connected to a corresponding copper block (19) and copper bar (20).

2. A ditch depth measuring device for land surveying and mapping according to claim 1, characterized in that: The bottoming assembly comprises: a cylinder (8), the cylinder (8) being fixedly mounted on the end of the connecting rope (3), and a first contact piece (10) being fixed on the top of the cylinder (8), and a second contact piece (11) being slidably arranged inside the cylinder (8), and the second contact piece (11) being located below the first contact piece (10).

3. A ditch depth measuring device for land surveying and mapping according to claim 2, characterized in that: A chassis (9) is horizontally arranged below the cylinder (8), and a connecting rod (12) is vertically fixedly installed at the center of the top of the chassis (9), the top of the connecting rod (12) is fixedly installed at the bottom of the second contact piece (11), and the surface of the connecting rod (12) is slidably arranged in the inner wall of the bottom of the cylinder (8) through a spline, and a straight spring (13) is sleeved on the surface of the connecting rod (12), and the two ends of the two straight springs (13) are respectively installed at the bottom of the cylinder (8) at the bottom of the second contact piece (11).

4. A ditch depth measuring device for land surveying and mapping according to claim 3, characterized in that: A first motor (4) is mounted on the top of the floating plate (1), and an output shaft of the first motor (4) is mounted at the center of the end surface of the winding roller (2); when the first contact piece (10) and the second contact piece (11) are in contact, radio waves can be emitted to control the first motor (4); a limit plate (5) is fixedly mounted horizontally on the top of the floating plate (1), and a through hole is provided on the limit plate (5) for the connection rope (3) to pass through.

5. A ditch depth measuring device for land surveying and mapping according to claim 4, characterized in that: A first bevel gear (26) is fixedly mounted on the telescopic end of the second spring rod (23), and a second bevel gear (27) is meshed at the bottom of the first bevel gear (26). A pinion gear (28) is fixedly mounted on the bottom of the second bevel gear (27), and when the pinion gear (28) and the large gear (21) are in contact, the pinion gear (28) and the large gear (21) are meshed. A magnet disk (31) is fixedly sleeved on the telescopic end of the second spring rod (23), and when the electromagnet (30) is energized, it repels the magnet disk (31) magnetically.

6. A ditch depth measuring device for land surveying and mapping according to claim 5, characterized in that: The telescopic end surface of the second spring rod (23) is rotatably sleeved with an L-shaped frame (24), and a rotating shaft (29) is vertically rotatably mounted on the bottom of the horizontal side of the L-shaped frame (24), and the end of the rotating shaft (29) is fixedly mounted at the top center of the second bevel gear (27). A sliding groove (14) is provided at the bottom of the floating plate (1), and a sliding block (15) is slidably mounted inside the sliding groove (14), and a fixing rod (25) is vertically fixedly mounted on the bottom of the sliding block (15), and the end of the fixing rod (25) is fixedly mounted on the top of the horizontal side of the L-shaped frame (24).

7. The method for using the ditch depth measuring device for land surveying and mapping according to claim 6, characterized in that: The following steps are involved: S1: First, the floating plate (1) is placed on the liquid surface of the river ditch to be measured, and then the first motor (4) and the second motor (6) are started. The second motor (6) drives the shaft (22) to rotate, and the shaft (22) drives the large gear (21) to rotate. The first motor (4) drives the winding roller (2) to rotate, so as to pay out the connecting rope (3). The pay-out cylinder (8) and the chassis (9) of the connecting rope (3) move downward; S2: When the chassis (9) contacts the bottom of the ditch, the cylinder (8) will continue to move downward, and the cylinder (8) will drive the first contact piece (10) to move downward, and further the first contact piece (10) and the second contact piece (11) will contact each other. At this time, the first motor (4) will stop working, and finally the length of the line released by the connecting rope (3) can be read; S3: In addition, when the winding roller (2) is releasing the connecting rope (3), the water in the ditch will cause the connecting rope (3) to be skewed and the winding roller (2) to be non-vertical. The skew of the connecting rope (3) will cause the corresponding arc plate (18) to move. The movement of the arc plate (18) drives the telescopic end of the spring rod and the copper bar (20) to move and causes the first spring rod (17) to generate elastic force. Then, the copper bar (20) and the copper block (19) will contact and cause the electromagnet (30) to work. Since the magnet disk (31) and the working electromagnet (30) repel each other magnetically, the electromagnet (30) will cause the magnet disk (31) to move away from the impeller (7). The movement of the magnet disk (31) drives the telescopic end of the second spring rod (23) and the first bevel gear (26) to move. The movement of the telescopic end of the second spring rod (23) drives the L-shaped frame (24) to move. The movement of the L-shaped frame (24) drives the rotating shaft (29) and the fixed rod (25). ) moves, due to the arrangement of the slide groove (14) and the slider (15), the movement direction of the L-shaped frame (24) is stable, the movement of the rotating shaft (29) drives the second bevel gear (27) and the small gear (28) to move, so that the small gear (28) and the large gear (21) are meshed, and the large gear (21) further rotates to drive the small gear (28) to rotate, the small gear (28) rotates to drive the second bevel gear (27), the second bevel gear (27) rotates to drive the first bevel gear (26), the first bevel gear (26) rotates to drive the second spring rod (23), the second spring rod (23) rotates to drive the impeller (7), and the impeller (7) rotates to cause the floating plate (1) to move in a direction close to the cylinder (8), so as to achieve verticality between the winding roller (2) and the connecting rope (3), thereby ensuring that the reading of the connecting rope (3) is accurate after the cylinder (8) touches the bottom, and no additional manual operation is required throughout the process; S4: As the floating plate (1) moves, the connecting rope (3) will become straight and no longer be skewed. At this time, the connecting rope (3) no longer exerts a force on the arc plate (18), and the elastic force generated by the first spring rod (17) will reset the arc plate (18), and the copper block (19) and the copper bar (20) will no longer be in contact. The corresponding small gear (28) will also reset and no longer mesh with the large gear (21). In summary, the skewed state of the connecting rope (3) can be automatically adjusted when measuring the depth of the ditch.

Images