CN112762320B - A fixed benchmark for surveying and mapping engineering - Google Patents

Abstract

The invention discloses a fixed marker post for surveying and mapping of surveying and mapping engineering, which comprises a fixed base and a pointed inserting rod, wherein a first layer plate and a second layer plate are arranged inside the fixed base, the four corners of the bottom of the second layer plate are fixedly connected with the pointed inserting rod, a first motor is arranged above the first layer plate, and the output end of the first motor is fixedly connected with a first rotating shaft. Thereby can realize inserting the tip inserted bar is automatic in soil, when avoiding artifical inserting to establish the tip inserted bar, four tip inserted bars that set up can make the device more stable.

Description

A fixed benchmark for surveying and mapping engineering

technical field

The invention belongs to the technical field of engineering surveying and mapping, and in particular relates to a fixed benchmark for surveying and mapping engineering.

Background technique

The major of surveying and mapping engineering is a highly specialized comprehensive discipline, supported by both main disciplines and many related disciplines.

This major mainly studies the basic theories and technologies of space, electronics, information, laser, inertia and other sciences, and studies the use of these technologies to determine the shape of the earth and other stars, the three-dimensional characteristics of buildings (structures) and their relationship with the designated reference frame, The earth's gravitational field and its internal physical characteristics, the characteristics of moving objects and their multi-dimensional parameters, and the basic theories and methods for the application of these technologies in engineering, industry and human life. Cultivate the ability to master the basic principles and methods of spatial information acquisition, processing, analysis, expression and application, master the basic theory of modern spatial measurement technology, digital photogrammetry and remote sensing technology, geographic information system and cartography, with solid mathematics, foreign language, Senior surveying and mapping scientific and technological talents with computer application foundation and good business quality.

Most of the benchmarks commonly used in the existing engineering surveying and mapping only have a single insertion rod inserted into the ground, and it is not stable when inserted into the ground, and the existing benchmarking rods for engineering surveying and mapping often need to be inserted manually, and the sharp parts in the soil are inserted. It is difficult to retract after use, which is easy to cause injury to the staff, and is inconvenient for transportation. The benchmark needs to be kept straight during the measurement process. The existing benchmark is not easy to adjust in its vertical state, and it is easy to tilt and affect the measurement results. , and the existing benchmark is difficult to adjust its own height.

SUMMARY OF THE INVENTION

The technical problem to be solved by the present invention is to overcome the existing defects and provide a fixed benchmark for surveying and mapping in surveying and mapping engineering, so as to solve the problem that most of the commonly used benchmarks proposed in the above background technology only have a single insertion rod inserted into the ground, and when inserted into the ground It is not stable, and the existing benchmarks for engineering surveying and mapping often need to be inserted manually, and the sharp parts inserted into the soil are difficult to retract after use, which is easy to cause injury to the staff, and is inconvenient to transport. The benchmark is in the process of measurement. It is necessary to maintain a straight state in the existing benchmark, the vertical state of the existing benchmark is not easy to adjust, and it is easy to be inclined to affect the measurement result, and the existing benchmark is difficult to adjust its own height.

In order to achieve the above purpose, the present invention provides the following technical solutions: a fixed benchmark for surveying and mapping engineering, comprising a fixed base and a pointed plug, the interior of the fixed base is provided with a first layer board and a second layer board, the The four corners of the bottom of the second layer board are fixedly connected with pointed plug rods. Above the first layer board and above the first layer board is a first motor, and the output end of the first motor is fixedly connected with a The first rotating shaft, the bottom of the first rotating shaft is provided with a meshing gear, the lower part of the first layer plate is set with a transmission gear, the meshing gear is connected with the transmission gear, and the bottom of the transmission gear is fixedly connected with a first a threaded rod, the first threaded rod penetrates the second layer board and is threadedly connected with the second layer board, the bottom of the second layer board is fixedly connected with a first electric push rod, the first electric push rod The bottom of the rod is fixedly connected with a universal wheel, the side of the upper surface of the fixed base is fixedly connected with a lower connecting piece, the central position of the upper surface of the fixed base is provided with a main pole, and the four sides of the main pole are Both sides of the second electric push rod are provided with obliquely arranged second electric push rods, and the two sides of the second electric push rod are fixedly connected with connecting columns. The four sides of the main benchmark rod are provided with upper connecting pieces. The push rod is rotatably connected with the upper connecting piece through the limit turning rod, and the second electric push rod below is rotatably connected with the lower connecting piece through the limit turning rod. The output end of the motor is fixedly connected with a second threaded rod, a telescopic rod is arranged above the second threaded rod, and the second threaded rod is threadedly connected with the telescopic rod, and a balance control box is fixed on the top of the main rod and a control box, the inside of the balance control box is provided with a fixed rod, the outside of the fixed rod is provided with a swivel, a swing rod is fixedly connected below the swivel, and a small battery is fixedly connected below the swing rod , a swing conductive pointer is arranged below the small battery, and a conductive wire is arranged inside the balance control box.

The first layer plate is far away from the transmission gear, the upper center of the transmission gear is fixedly connected with a second rotating shaft, the upper part of the second rotating shaft is fixedly connected with a turntable, and the turntable is located inside the first layer plate and rotates connected, the four transmission gears are all away from the side wall of the fixed base and mesh with the meshing gears.

The position where the first electric push rod penetrates the bottom plate of the fixed base is provided with a push rod recovery groove, the position where the pointed insertion rod penetrates the bottom plate of the fixed base is provided with a rod insertion groove, and the bottom of the first threaded rod is provided with a rod insertion groove. It is rotatably connected above the bottom plate of the fixed base.

The telescopic pole is slidably connected inside the main pole through the second motor and the second threaded rod. The height of the second threaded pole is equal to the height of the main pole. The number of the balance control boxes is two. The balance control box is fixedly connected at the top of the adjacent two sides of the main benchmark, and the control box is fixedly connected at the top of the other adjacent two sides of the main benchmark. The balance control box and the control box have the same size and equal weight.

The first layer plate is fixedly connected with the inner wall of the fixed base, the first layer plate and the second layer plate are far away from the top plate and the bottom plate of the fixed base, the first layer plate and the second layer plate are far away from the top plate and the bottom plate of the fixed base plate. The second-layer boards are far away from each other, the second-layer board is located on the inner wall of the fixed base and is slidably connected, and the first-layer board is located above the second-layer board and is fixedly connected to the inner wall of the fixed base.

The second electric push rod, the first motor, the second motor, the first electric push rod and the control box are all electrically connected to the external power supply, and the second electric push rod, the first motor, the second motor, the first electric push rod, The electric push rods are all electrically connected to the control box, the conductive wires are electrically connected to the indicator lights through wires, and the oscillating conductive pointers are electrically connected to the small accumulator.

The conductive wire is located at the center position inside one side of the balance control box, the oscillating conductive pointer is connected to the conductive wire when it is completely vertical, and the swivel ring is located in the interior of the fixed rod for rotational connection, The surface of the telescopic pole is provided with a scale.

Preferably, the number of the transmission gears is four, and the four transmission gears are respectively distributed at the four corners of the bottom of the first layer board.

Preferably, the number of the first electric push rods is four, the four first electric push rods are respectively located at the four corners of the bottom of the second layer board, the first electric push rod, the pointed plug rod and the The first threaded rods are all away from each other.

Preferably, upper connecting pieces are provided on both sides of the upper connecting column, the upper limit pivot rod passes through the upper connecting piece and the connecting column, and the upper limit pivot rod is fixedly connected with the upper connecting piece , the upper limit rotation rod is rotatably connected with the connecting column, the lower connecting piece is provided on both sides of the lower connecting column, and the lower connecting piece and the interior of the connecting column are provided with the limit rotation The lower limit lever is fixedly connected with the lower connecting piece.

Preferably, the lower connecting pieces are distributed in the middle of the four sides of the upper surface of the fixed base, and the upper connecting pieces are distributed in the center of the four sides of the main pole.

Compared with the prior art, the present invention provides a fixed benchmark for surveying and mapping in surveying and mapping engineering, which has the following beneficial effects:

1. The present invention can drive the first rotating shaft of the output end of the first motor to rotate when the first motor is started, thereby driving the meshing gear that is fixedly connected to the bottom of the first rotating shaft to rotate. During the rotation, the meshing gear meshes with the transmission gears on the four sides to make the transmission gear rotate, so as to drive the first threaded rod at the bottom of the transmission gear to rotate, and the first threaded rod drives the second layer board to lift during the rotation process, thereby Realize the lifting and lowering of the pointed rod at the bottom of the second layer board, so that the pointed rod can be automatically inserted into the soil, avoiding the need to manually insert the pointed rod, and the four pointed rods can make the device It is more stable. By setting the balance control box and the control box, the size and weight are the same, which can balance the weight of both sides, and avoid the device being fixed on one side to affect the balance of both sides.

2. The present invention can realize the telescopic and extension of the universal wheel through the provided first electric push rod, and can extend the first electric push rod during transportation, so that the device can be conveniently carried out through the universal wheel at the bottom of the first electric push rod. Handling, to avoid the trouble of manual handling.

3. The present invention can adjust the main benchmark while extending or shortening the four second electric push rods respectively through the set second electric push rods, so as to ensure that the main benchmark rod is in a vertical position. The limit rotation rod and the connecting column can make the second electric push rod rotate and fix arbitrarily.

4. The present invention can drive the second threaded rod of the output end to rotate when the second motor is activated by the set second motor, and the second threaded rod can drive the telescopic pole to lift when rotating, and the relative extension height can be set through the set scale. , so that the height of the ruler can be adjusted.

5. The present invention can detect the inclination of four sides by setting the two balance control boxes adjacent to each other. When the device is inclined, due to the heavy weight of the small battery, the swivel rotates vertically and downwards away from the conductive line when it is inclined. The circuit is disconnected, and the indicator light does not light up. When the device is in a completely vertical state, swing the conductive pointer vertically downward to contact the conductive wire. At this time, the indicator light is energized and illuminated, and the ruler can be used for accurate measurement.

Description of drawings

The accompanying drawings are used to provide a further understanding of the present invention, and constitute a part of the specification. Together with the embodiments of the present invention, they are used to explain the present invention, but not to limit the present invention. In the accompanying drawings:

1 is a schematic diagram of a three-dimensional structure proposed by the present invention;

Fig. 2 is the front view structure schematic diagram proposed by the present invention;

Fig. 3 is the internal structure schematic diagram of the front view proposed by the present invention;

Fig. 4 is the top-view structural schematic diagram proposed by the present invention;

Fig. 5 is the bottom view structure schematic diagram of the bottom of the second layer board proposed by the present invention;

Fig. 6 is the bottom view structure schematic diagram of the bottom of the first layer board proposed by the present invention;

Fig. 7 is the enlarged schematic diagram of the A structure proposed by the present invention;

Fig. 8 is the enlarged schematic diagram of the B structure proposed by the present invention;

In the figure: 1. Fixed base; 2. The first layer; 3. The second layer; 4. The first motor; 5. The first shaft; 6. The meshing gear; 7. The transmission gear; 8. The turntable; The second shaft; 10, the first threaded rod; 11, the pointed rod; 12, the rod slot; 13, the first electric push rod; 14, the push rod recovery slot; 15, the universal wheel; 16, the lower connecting piece ; 17, upper connecting piece; 18, second electric push rod; 19, limit lever; 20, connecting column; 21, second motor; 22, main benchmark; 23, second threaded rod; 24, telescopic benchmark; 25, balance control box; 26, prompt light; 27, control box; 28, swivel; 29, fixed rod; 30, swing rod; 31, small battery; 32, swing conductive pointer; 33, conductive wire.

Detailed ways

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, but not all of 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.

1-8, the present invention provides a technical solution: a fixed benchmark for surveying and mapping engineering, including a fixed base 1 and a pointed plug 11, and the interior of the fixed base 1 is provided with a first layer board 2 and a second layer The four corners of the bottom of the layer 3 and the second layer 3 are fixedly connected with pointed plugs 11. Above the first layer 2 and above the first layer 2 is a first motor 4. The output of the first motor 4 The end is fixedly connected with a first rotating shaft 5, a meshing gear 6 is arranged at the bottom of the first rotating shaft 5, a transmission gear 7 is arranged under the first layer board 2, and the meshing gear 6 is connected with the transmission gear 7 in a transmission. When the first motor 4 is started At the same time, the first rotating shaft 5 at the output end of the first motor 4 is driven to rotate, thereby driving the meshing gear 6 fixedly connected with the bottom of the first rotating shaft 5 to rotate. The bottom of the transmission gear 7 is fixedly connected with a first threaded rod 10, and the meshing gear 6 is rotating. During the process, it meshes with the transmission gear 7 on the four sides to make the transmission gear 7 rotate, so as to drive the first threaded rod 10 at the bottom of the transmission gear 7 to rotate. Screw connection, the bottom of the second layer board 3 is fixedly connected with a first electric push rod 13, the bottom of the first electric push rod 13 is fixedly connected with a universal wheel 15, and the side of the upper surface of the fixed base 1 is fixedly connected with a lower connection Sheet 16, the central position of the upper surface of the fixed base 1 is provided with a main pole 22, the four sides of the main pole 22 are provided with a second electric push rod 18 arranged obliquely, and both sides of the second electric push rod 18 are fixed. The connecting column 20 is connected, and the upper connecting piece 17 is provided on the four sides of the main pole 22, which can adjust the main pole 22 while extending or shortening the four second electric push rods 18 respectively, so as to ensure that the main pole 22 is in a vertical position, and the upper The second electric push rod 18 is rotatably connected with the upper connecting piece 17 through the limit lever 19, and the second electric push rod 18 below is rotatably connected with the lower connecting piece 16 through the limit lever 19. A second threaded rod 23 is fixedly connected to the output end of the second motor 21 , a telescopic rod 24 is arranged above the second threaded rod 23 and the second threaded rod 23 is threadedly connected with the telescopic rod 24 . The main rod The top of 22 is fixedly provided with a balance control box 25 and a control box 27, which can realize the detection of the inclination of four sides. The balance control box 25 is provided with a fixed rod 29 inside, and the outside of the fixed rod 29 is provided with a rotating ring 28. The rotating ring A swing rod 30 is fixedly connected to the bottom of the 28, a small battery 31 is fixedly connected to the bottom of the swing rod 30, a swing conductive pointer 32 is arranged below the small battery 31, and a conductive wire 33 is arranged inside the balance control box 25. Because the small battery 31 Heavier, the swivel 28 rotates vertically downward away from the conductive wire 33 when it is tilted to disconnect the circuit, the indicator light 26 does not light up, when the device is in a completely vertical state, the swing conductive pointer 32 vertically downwards and contacts the conductive wire 33, At this time, the prompt light 26 is energized and illuminated, and the ruler can be used for accurate measurement.

The first layer board 2 is far away from the transmission gear 7, the upper center position of the transmission gear 7 is fixedly connected with a second rotating shaft 9, the upper part of the second rotating shaft 9 is fixedly connected with a turntable 8, and the turntable 8 is located in the first layer board 2. The inner rotation connection, The four transmission gears 7 are far away from the side wall of the fixed base 1 and mesh with the meshing gears 6 .

The position where the first electric push rod 13 penetrates the bottom plate of the fixed base 1 is provided with a push rod recovery groove 14 , the position where the pointed plug rod 11 penetrates the bottom plate of the fixed base 1 is provided with a rod plug groove 12 , and the bottom of the first threaded rod 10 is located on the fixed base The rotating connection above the bottom plate of the 1 can realize the telescopic and extension of the universal wheel 15, and can extend the first electric push rod 13 during transportation, so that the device can be easily transported through the universal wheel 15 at the bottom of the first electric push rod 13 , to avoid the trouble of manual handling.

The telescopic rod 24 is slidably connected inside the main rod 22 through the second motor 21 and the second threaded rod 23. When the second motor 21 is activated, the second threaded rod 23 at the output end is driven to rotate, and the second threaded rod 23 can drive the telescopic rod 23 when rotating. The benchmark rod 24 is lifted up and down, and the relative extension height can be set through the set scale, so that the adjustment of the scale height can be realized. The height of the second threaded rod 23 is equal to the height of the main benchmark rod 22. The two balance control boxes 25 are fixedly connected at the top of the adjacent two sides of the main pole 22, and the control box 27 is fixedly connected at the top of the other adjacent two sides of the main pole 22. The balance control box 25 and the control box 27 have the same size and equal weight. .

The first layer board 2 is fixedly connected with the inner wall of the fixed base 1, the first layer plate 2 and the second layer plate 3 are both far away from the top plate and the bottom plate of the fixed base plate 1, and the first layer plate 2 and the second layer plate 3 are far away from each other , the second layer board 3 is located on the inner wall of the fixed base 1 and is slidably connected, and the first layer board 2 is located above the second layer board 3 and is fixedly connected to the inner wall of the fixed base 1 .

The second electric push rod 18 , the first motor 4 , the second motor 21 , the first electric push rod 13 and the control box 27 are all electrically connected to the external power supply. The second electric push rod 18 , the first motor 4 , the second motor 21. The first electric push rod 13 is electrically connected to the control box 27 , the conductive wire 33 is electrically connected to the indicator light 26 through the wire, and the oscillating conductive pointer 32 is electrically connected to the small battery 31 .

The conductive wire 33 is located at the center of the inner side of the balance control box 25, and the oscillating conductive pointer 32 is connected to the conductive wire 33 when it is completely vertical, and the swivel 28 is located inside the fixed rod 29. There are scales.

In the present invention, preferably, the number of transmission gears 7 is four, and the four transmission gears 7 are respectively distributed at the four corners of the bottom of the first layer board 2 .

In the present invention, preferably, the number of the first electric push rods 13 is four, and the four first electric push rods 13 are located at the four corners of the bottom of the second layer board 3 respectively. and the first threaded rod 10 are far away from each other, and the first threaded rod 10 drives the second layer board 3 to lift during the rotation process, so as to realize the lifting and lowering of the pointed insert rod 11 at the bottom of the second layer board 3, so as to realize the The head plunger 11 is automatically inserted into the soil, avoiding the need to manually insert the pointed plunger 11, and the four pointed plunger 11 provided can make the device more stable.

In the present invention, preferably, the upper connecting piece 17 is provided on both sides of the upper connecting column 20, the upper limit turning rod 19 penetrates the upper connecting piece 17 and the connecting column 20, and the upper limit turning rod 19 and the upper connecting piece 17 is fixedly connected, the upper limit lever 19 is rotatably connected with the connecting column 20, the lower connecting piece 16 is provided on both sides of the lower connecting column 20, and the interior of the lower connecting piece 16 and the connecting column 20 is provided with a limit rotation. The rod 19, the lower limit rotation rod 19 is fixedly connected with the lower connecting piece 16.

In the present invention, preferably, the lower connecting pieces 16 are distributed in the middle of the four sides of the upper surface of the fixed base 1 , and the upper connecting pieces 17 are distributed in the center of the four sides of the main pole 22 .

The working principle and use process of the present invention: When in use, the first electric push rod 13 is extended to transport the device to the location to be measured through the universal wheel 15 at the bottom of the first electric push rod 13, and then the first electric push rod 13 is retracted and retracted The universal wheel 15, the universal wheel 15 can facilitate the handling of the device, avoid the trouble of manual handling, and then start the first motor 4 to drive the first rotating shaft 5 to rotate, thereby driving the meshing gear 6 that is fixedly connected to the bottom of the first rotating shaft 5. During the rotation, the meshing gear 6 meshes with the transmission gear 7 on the four sides to make the transmission gear 7 rotate, so as to drive the first threaded rod 10 at the bottom of the transmission gear 7 to rotate, and the first threaded rod 10 drives the first threaded rod 10 during the rotation process. The second layer board 3 is lifted and lowered, so as to realize the lifting and lowering of the pointed rod 11 at the bottom of the second layer board 3, so that the pointed rod 11 can be automatically inserted into the soil, and the pointed rod 11 can be automatically inserted into the soil without manual insertion of the pointed rod 11. At the same time, the set of four pointed plug rods 11 can make the device more stable, and while extending or shortening the four second electric push rods 18 respectively, the main rod 22, the upper connecting piece 17, the lower connecting piece 16, the limiter can be adjusted. The rotating rod 19 and the connecting column 20 can make the second electric push rod 18 rotate and fix arbitrarily, and ensure that the main pole 22 is in a vertical position. When the device is tilted, because the small battery 31 is heavy, the rotating ring 28 rotates vertically when tilted. Move down and away from the conductive wire 33 to disconnect the circuit, and the indicator light 26 does not light up. When the device is in a completely vertical state, swing the conductive pointer 32 vertically downward to contact the conductive wire 33. At this time, the indicator light 26 is energized and lights up. The ruler is used for accurate measurement. When the length of the ruler needs to be adjusted, the second motor 21 is activated to drive the second threaded rod 23 at the output end to rotate. Height adjustment.

Although embodiments of the present invention have been shown and described, it will be understood by those skilled in the art that various changes, modifications, and substitutions can be made in these embodiments without departing from the principle and spirit of the invention and modifications, the scope of the present invention is defined by the appended claims and their equivalents.

Claims (5)

1. A fixed benchmark for surveying and mapping engineering, comprising a fixed base (1) and a pointed insert rod (11), characterized in that: the interior of the fixed base (1) is provided with a first layer board (2) and a A second-layer board (3), the four corners of the bottom of the second-layer board (3) are fixedly connected with pointed plugs (11), and a first motor (4) is arranged above the first-layer board (2) , the output end of the first motor (4) is fixedly connected with a first rotating shaft (5), the bottom of the first rotating shaft (5) is provided with a meshing gear (6), and the first layer plate (2) A transmission gear (7) is arranged below, the meshing gear (6) is connected with the transmission gear (7) in a transmission manner, and a first threaded rod (10) is fixedly connected to the bottom of the transmission gear (7). The rod (10) penetrates the second layer board (3) and is threadedly connected to the second layer plate (3), and the bottom of the second layer plate (3) is fixedly connected with a first electric push rod (13) , the bottom of the first electric push rod (13) is fixedly connected with a universal wheel (15), the side of the upper surface of the fixed base (1) is fixedly connected with a lower connecting piece (16), the fixed base (1) The central position of the upper surface is provided with a main pole (22), and the four sides of the main pole (22) are provided with obliquely arranged second electric push rods (18). Both sides of the rod (18) are fixedly connected with connecting columns (20), the four sides of the main benchmark (22) are provided with upper connecting pieces (17), and the upper second electric push rod (18) passes through the limiter. The positioning lever (19) is rotatably connected with the upper connecting piece (17), and the lower second electric push rod (18) is rotatably connected with the lower connecting piece (16) through the limiting lever (19). A second motor (21) is arranged inside the (22), and a second threaded rod (23) is fixedly connected to the output end of the second motor (21). A benchmark (24) and the second threaded rod (23) are threadedly connected to the telescopic benchmark (24), and a balance control box (25) and a control box (27) are fixedly arranged on the top of the main benchmark (22). A fixing rod (29) is arranged inside the balance control box (25), a rotating ring (28) is arranged outside the fixing rod (29), and a swinging rod (30) is fixedly connected to the lower part of the rotating ring (28). A small battery (31) is fixedly connected below the swing rod (30), a swing conductive pointer (32) is arranged below the small battery (31), and a conductive needle (32) is arranged inside the balance control box (25) line(33); The first layer plate (2) is away from the transmission gear (7), the upper central position of the transmission gear (7) is fixedly connected with a second rotating shaft (9), and the upper part of the second rotating shaft (9) is fixed A turntable (8) is connected, and the turntable (8) is located in the interior of the first layer board (2) for rotational connection, and the four transmission gears (7) are far away from the side wall of the fixed base (1) and are connected to the the meshing gear (6) meshes; The position where the first electric push rod (13) penetrates the bottom plate of the fixed base (1) is provided with a push rod recovery groove (14), and the pointed insertion rod (11) penetrates through the bottom of the bottom plate of the fixed base (1). A rod insertion slot (12) is provided at the position, and the bottom of the first threaded rod (10) is rotatably connected above the bottom plate of the fixed base (1); The telescopic rod (24) is slidably connected inside the main rod (22) through a second motor (21) and a second threaded rod (23), and the height of the second threaded rod (23) is the same as the height of the main rod (22) The heights are equal, the number of the balance control boxes (25) is two, the two balance control boxes (25) are fixedly connected at the top of the adjacent two sides of the main pole (22), and the control boxes (27) The tops of the other adjacent sides of the main benchmark (22) are fixedly connected, and the balance control box (25) and the control box (27) have the same size and equal weight; The first layer board (2) is fixedly connected to the inner wall of the fixed base (1), and both the first layer board (2) and the second layer board (3) are far away from the fixed base (1) The top plate and the bottom plate are separated from each other. The first layer plate (2) is located above the second layer plate (3) and is fixedly connected to the inner wall of the fixed base (1); The second electric push rod (18), the first motor (4), the second motor (21), the first electric push rod (13) and the control box (27) are all electrically connected to an external power supply, and the first electric push rod (13) and the control box (27) are all electrically connected to the external power supply. The two electric push rods (18), the first motor (4), the second motor (21), and the first electric push rod (13) are all electrically connected to the control box (27), and the conductive wire (33) passes through the wire is electrically connected to the prompt light (26), and the swinging conductive pointer (32) is electrically connected to the small storage battery (31); The conductive wire (33) is located at the center position inside one side of the balance control box (25). The swivel (28) is located inside the fixed rod (29) for rotational connection, and the surface of the telescopic rod (24) is provided with a scale. 2. The fixed benchmark for surveying and mapping in a surveying and mapping project according to claim 1, wherein the number of the transmission gears (7) is four, and the four transmission gears (7) are respectively distributed in the The four corners of the bottom of the first layer board (2). 3. The fixed benchmark for surveying and mapping in a surveying and mapping project according to claim 1, wherein the number of the first electric push rods (13) is four, and the four first electric push rods (13) They are respectively located at the four corners of the bottom of the second layer board (3), and the first electric push rod (13), the pointed insert rod (11) and the first threaded rod (10) are all far away from each other. 4. A kind of fixed benchmark for surveying and mapping in surveying and mapping engineering according to claim 1, characterized in that: upper connecting pieces (17) are provided on both sides of the upper connecting column (20), and the upper limit rotation The rod (19) penetrates the upper connecting piece (17) and the connecting column (20), and the upper limit turning rod (19) is fixedly connected with the upper connecting piece (17), and the upper limit turning rod ( 19) It is rotatably connected with the connecting column (20), the lower connecting piece (16) is provided on both sides of the connecting column (20) below, and the inner parts of the lower connecting piece (16) and the connecting column (20) are The limit rotation rod (19) is arranged through the limit rotation rod (19), and the lower limit rotation rod (19) is fixedly connected with the lower connecting piece (16). 5. A kind of fixed benchmark for surveying and mapping in surveying and mapping engineering according to claim 1, characterized in that: the lower connecting pieces (16) are distributed in the middle position of the four sides of the upper surface of the fixed base (1) in pairs, and the The upper connecting pieces (17) are distributed at the center positions of the four sides of the main benchmark (22).

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