Surveying and mapping device for land reserve

Abstract

The invention discloses a surveying and mapping device for land reserve, and relates to the technical field of surveying and mapping scaleplates, the surveying and mapping device comprises a surveying and mapping box staff member, the surveying and mapping box staff member is provided with a grading detection member, and the grading detection member is used for controlling the surveying and mapping box staff member to stretch out and draw back step by step; a locking control piece is mounted on the surveying and mapping box staff piece; the locking control piece is used for locking the surveying and mapping box staff piece; a traction piece is mounted on the surveying and mapping box staff piece; a counterweight positioning piece is mounted on the traction piece; the locking control piece is matched with the grading detection piece, so that the second-level ruler, the third-level ruler and the tail-end ruler need to be ensured to sequentially and completely stretch out when a worker stretches out the surveying and mapping box staff; the surveying and mapping device solves the problems that an existing surveying and mapping device for land reserve is inconvenient to automatically control step-by-step extension, and a worker is inconvenient to quickly switch a next surveying and mapping point.

Description

Technical Field

[0001] The present invention relates to the technical field of surveying and mapping scales, in particular to a surveying and mapping device for land reserves. Background Art

[0002] Surveying rulers play an important role in surveying and mapping work such as land reserve area. In the actual use of rulers, they are usually used in conjunction with total stations. After the positioning is completed, the total station usually needs to frequently move the ruler to align with the total station for positioning work when performing layout and other work. Among them, retractable tower rulers are widely used. The current land reserve surveying and mapping devices are not convenient for automatic control and step-by-step extension. At the same time, the thickness of each segment of the ruler is relatively thin, which is not convenient for timely observation and learning, and easily affects the accuracy of the ruler measurement data. Direct readings are prone to reading errors, and it is also inconvenient for staff to quickly switch to the next surveying point. Surveying points are usually marked in advance with lime, etc., which is not convenient for staff to find, and are easily blown away by the wind to cause interference, making it inconvenient to guide point changes.

[0003] To this end, we propose a surveying and mapping device for land reserves. Summary of the Invention

[0004] The purpose of the present invention is to provide a land reserve surveying and mapping device to solve the problem raised in the above background technology that the current land reserve surveying and mapping device is not convenient for automatic control to extend step by step, and it is not convenient for workers to quickly switch to the next surveying and mapping point.

[0005] To achieve the above-mentioned object, the present invention provides the following technical solution: a land reserve surveying and mapping device, comprising a surveying and mapping scale piece, the surveying and mapping scale piece being mounted with a graded detection piece, the graded detection piece being used to control the stepwise extension and retraction of the surveying and mapping scale piece; a locking control piece being mounted on the surveying and mapping scale piece, the locking control piece being used to lock the surveying and mapping scale piece; A traction member is installed on the surveying tower ruler; a counterweight positioning member is installed on the traction member; the traction member is used for vertical line positioning; A point-finding positioning piece is installed at the bottom of the surveying and mapping tower ruler; the point-finding positioning piece is used to facilitate point-finding of the total station; The surveying tower ruler comprises: a first-level ruler, a level bubble is fixedly installed on the side of the first-level ruler; and a handle is provided on the first-level ruler.

[0006] Preferably, the surveying tower ruler component includes: a second-level ruler, a third-level ruler and an end-level ruler, and the first-level ruler, the second-level ruler, the third-level ruler and the end-level ruler are provided with scales; the first-level ruler is slidably plugged into the second-level ruler; the third-level ruler is slidably plugged into the second-level ruler; the end-level ruler is slidably plugged into the third-level ruler; the first-level ruler, the second-level ruler, the third-level ruler and the end-level ruler are respectively fixedly embedded with indicator light strips; the bottoms of the second-level ruler, the third-level ruler and the end-level ruler are respectively slidably plugged into limit columns, and the tails of the three limit columns are respectively fixedly installed with positioning springs, and the three positioning springs are respectively located inside the second-level ruler, the third-level ruler and the end-level ruler; the ends of the limit columns are arc-shaped structures.

[0007] Preferably, the grading detection component includes: a grading column, three of which are provided, and the three grading columns are respectively slidably inserted above the first-level ruler, the second-level ruler and the third-level ruler; the grading columns are aligned with the limit columns; the three grading columns are respectively sleeved with tension springs, and the three tension springs are respectively connected between the three grading columns and the side surfaces of the first-level ruler, the second-level ruler and the third-level ruler; in-position switches are respectively fixedly installed on the inner sides of the two lower grading columns; the tension of the three tension springs is less than the elastic force of the three positioning springs; the three grading columns are respectively used to manually press the three limit columns.

[0008] Preferably, the locking control component includes: a locking sliding cylinder, two of which are fixedly mounted above the second-level ruler and the third-level ruler respectively; electromagnets are fixedly mounted on the two locking sliding cylinders respectively; and the two in-position switches are electrically connected to the electromagnets located above them in turn.

[0009] Preferably, the locking control component also includes: a locking spring, a locking spring is respectively sleeved inside the two locking sliding cylinders; a plug-in column is respectively slidably inserted into the two locking sliding cylinders, and the two plug-in columns are respectively slidably inserted into the sides of the third-level ruler and the end ruler; the plug-in column is used to control the priority extension of the second-level ruler; the two locking springs are respectively connected between the plug-in column and the electromagnet on the same side.

[0010] Preferably, the traction member includes: a traction mounting plate, which is fixedly mounted on the top of the end scale; a through hole is provided on the traction mounting plate; a guide rope is inserted into the through hole on the traction mounting plate; a limiting ball is fixedly mounted on the tail of the guide rope, and the limiting ball is used for counterweight.

[0011] Preferably, the counterweight positioning member includes: a counterweight ball, a connecting column is fixedly installed on the counterweight ball, and the end of the connecting column is fixedly installed on the guide rope; the counterweight ball is used for counterweighting; a ground insertion shaft is fixedly installed on the bottom of the counterweight ball, and the two sides of the bottom of the ground insertion shaft are inclined structures; the ground insertion shaft is used to be inserted into the ground.

[0012] Preferably, the counterweight positioning member further includes: a warning light, and the warning light is fixedly mounted on the connecting column.

[0013] Preferably, the point-finding and positioning component includes: a ball stud and a connecting plate, the ball stud is fixedly installed on the bottom of the first-level ruler; the bottom of the ball stud is a ball head structure; a spherical hole is provided on the connecting plate; the ball head at the bottom of the ball stud is sleeved in the spherical hole on the connecting plate; a circle of through grooves is provided on the connecting plate; a V-shaped notch is provided on the side of the connecting plate; and a ground shaft is fitted in the V-shaped notch on the side of the connecting plate.

[0014] Preferably, the point-finding positioning member includes: positioning columns, a circle of positioning columns is fixedly installed on the bottom of the connecting plate; the bottoms of the circle of positioning columns are respectively conical structures; the positioning columns are used to be inserted into the ground to prevent slipping.

[0015] Compared with the prior art, the present invention has the following beneficial effects: The present invention adopts a locking control part in conjunction with a graded detection part to control the staff to ensure that the secondary scale, the tertiary scale and the terminal scale are fully extended in sequence when extending the surveying tower scale. When the secondary scale is not fully extended, the tertiary scale and the terminal scale cannot be extended together. It can be used to control the staff's operation standardization and avoid the problem of directly extending the tertiary scale and the terminal scale, which causes the reading to be the data on the tertiary scale or the terminal scale, and the surveying data to be wrong. It can ensure the surveying quality, has a simple structure, and is non-sensing for the staff.

[0016] The use of counterweight positioning parts in conjunction with the connecting plate can make it easier for staff to locate points more quickly when actually searching for points through the total station. Staff can plan the next surveying point in advance without the need to place reminders such as lime, which avoids contamination and makes it easier for staff to find points, preventing incorrect surveying point selection due to lack of communication and other factors.

[0017] The use of point-finding positioning parts can be used to support the first-level ruler, which can prevent the first-level ruler from sinking and facilitate the flexible adjustment of the angle of the first-level ruler. At the same time, the use of surveying tower ruler parts can realize telescopic adjustment and use. After contraction, it is convenient to take and store. At the same time, it can have a longer surveying area after extension. The use of indicator light strips can be used to prompt surveying personnel in the distance to stop surveying, to avoid wind interference in the distance and the inconvenience of surveying personnel in timely notification when the first-level ruler has not been adjusted. BRIEF DESCRIPTION OF THE DRAWINGS

[0018] Figure 1 This is a schematic diagram of the overall structure of a land reserve surveying and mapping device according to the present invention; Figure 2 This is a schematic diagram of the bottom structure of a land reserve surveying and mapping device according to the present invention; Figure 3 This is a cross-sectional view of the internal structure of a land reserve surveying and mapping device according to the present invention; Figure 4This is a schematic diagram of the structure of the surveying tower ruler of the present invention; Figure 5 For the present invention Figure 3 A magnified view of the structure of the middle B region; Figure 6 This is a schematic diagram of the traction member structure of the present invention; Figure 7 For the present invention Figure 6 A magnified view of the structure of the middle C region; Figure 8 This is a schematic diagram of the structure of the traction member of the present invention; Figure 9 For the present invention Figure 8 A magnified view of the structure of the middle D region; Figure 10 This is a schematic diagram of the structure of the positioning member of the present invention.

[0019] In the figure: 1. Surveying tower scale component; 101. First-level scale; 105. Level bubble; 102. Second-level scale; 103. Third-level scale; 104. End scale; 106. Indicator light strip; 107. Limit column; 108. Positioning spring; 2. Grading detection component; 201. Grading column; 202. Tension spring; 203. In-position switch; 3. Locking control component; 301. Locking sliding cylinder; 302. Electromagnet; 303. Locking spring; 304. Connecting column; 4. Traction component; 401. Traction mounting plate; 402. Guide rope; 403. Limiting ball; 5. Counterweight positioning component; 501. Counterweight ball; 5011. Connecting column; 5012. Plug-in shaft; 502. Warning light; 6. Point-finding positioning component; 601. Ball head column; 602. Connecting disk; 603. Positioning column. DETAILED DESCRIPTION

[0020] The following will clearly and completely describe the technical solutions in the embodiments of the present invention in conjunction with the accompanying drawings. Obviously, the described embodiments are only part of the embodiments of the present invention, not all of the embodiments. Based on the embodiments of the present invention, all other embodiments obtained by ordinary technicians in this field without making creative efforts are within the scope of protection of the present invention.

[0021] Example 1: Please refer to Figures 1 to 10 As shown: The present invention provides a technical solution: a surveying and mapping device for land reserves, comprising a surveying and mapping tower scale component 1, a graded detection component 2 being installed on the surveying and mapping tower scale component 1, the graded detection component 2 being used to control the step-by-step extension and retraction of the surveying and mapping tower scale component 1; a locking control component 3 being installed on the surveying and mapping tower scale component 1; the locking control component 3 being used to lock the surveying and mapping tower scale component 1; a traction component 4 being installed on the surveying and mapping tower scale component 1; a counterweight positioning component 5 being installed on the traction component 4; the traction component 4 being used for vertical line positioning; a point-finding positioning component 6 being installed at the bottom of the surveying and mapping tower scale component 1; the point-finding positioning component 6 being used to facilitate point finding by a total station; the surveying and mapping tower scale component 1 comprising: a first-level ruler 101 and a level bubble 105, the level bubble 105 being fixedly installed on the side of the first-level ruler 101; and a handle being provided on the first-level ruler 101.

[0022] Among them, the surveying tower ruler 1 includes: a second-level ruler 102, a third-level ruler 103, an end ruler 104, an indicator light strip 106, a limit column 107 and a positioning spring 108. The first-level ruler 101, the second-level ruler 102, the third-level ruler 103 and the end ruler 104 are provided with scales; the first-level ruler 101 is slidably plugged with the second-level ruler 102; the second-level ruler 102 is slidably plugged with the third-level ruler 103; the end ruler 104 is slidably plugged with the third-level ruler 103; the first-level ruler 101, the second-level ruler 102, the third-level ruler 103 and the end ruler 104 are respectively fixedly embedded with an indicator light strip 106; the second-level ruler 102, the third-level ruler 103 and the end ruler 104 are respectively slidably plugged with the limit column 107 at the bottom, and The tails of the three limit posts 107 are respectively fixed with positioning springs 108, and the three positioning springs 108 are respectively located inside the second-level ruler 102, the third-level ruler 103 and the end ruler 104; the end of the limit post 107 is an arc-shaped structure; the indicator light belt 106 is externally connected to a switch and a power supply; the point-finding positioning member 6 includes: a ball head column 601 and a connecting disk 602, the ball head column 601 is fixedly installed at the bottom of the first-level ruler 101; the bottom of the ball head column 601 is a ball head structure; a spherical hole is provided on the connecting disk 602; the ball head at the bottom of the ball head column 601 is sleeved in the spherical hole on the connecting disk 602; a circle of through grooves is provided on the connecting disk 602; a V-shaped notch is provided on the side of the connecting disk 602; The V-shaped notch is fitted with an inserting shaft 5012; the point-finding positioning member 6 includes: a positioning column 603, a circle of positioning columns 603 is fixedly installed at the bottom of the connecting plate 602; the bottoms of the circle of positioning columns 603 are respectively tapered structures; the positioning columns 603 are used to be inserted into the ground to prevent slipping, and the point-finding positioning member 6 can be used to support the first-level ruler 101, which can prevent the first-level ruler 101 from sinking, and at the same time facilitate the first-level ruler 101 to flexibly adjust the angle. At the same time, the surveying tower ruler 1 can be used to achieve telescopic adjustment and use. After contraction, it is convenient to take and store, and after extension, a longer surveying area can be provided. The indicator light strip 106 can be used to prompt surveyors in the distance to stop surveying to avoid wind interference in the distance. And it is inconvenient for surveyors to know in time when the first-level ruler 101 has not been adjusted. The structure is simple and flexible. When surveying, the connecting plate 602 is placed on the ground and the positioning column 603 is inserted into the ground. At this time, the first-level ruler 101 can be adjusted vertically, and the horizontal bubble 105 is observed to assist in leveling. According to the surveying height requirement, the second-level ruler 102, the third-level ruler 103 and the end ruler 104 can be manually pulled out. When the second-level ruler 102, the third-level ruler 103 and the end ruler 104 are extended, the positioning spring 108 can squeeze and push the limit column 107, extend and insert it into the socket of the grading column 201 installed on the first-level ruler 101, the second-level ruler 102 and the third-level ruler 103 to achieve positioning and ensure stability after extension.

[0023] Among them, the grading detection part 2 includes: a grading column 201, a tension spring 202 and an in-place switch 203. There are three grading columns 201, which are respectively slidably inserted above the first-level ruler 101, the second-level ruler 102 and the third-level ruler 103; the grading column 201 is aligned with the limit column 107; the three grading columns 201 are respectively sleeved with tension springs 202, and the three tension springs 202 are respectively connected between the three grading columns 201 and the side surfaces of the first-level ruler 101, the second-level ruler 102 and the third-level ruler 103; the in-place switches 203 are respectively fixedly installed on the inner sides of the two lower grading columns 201; the tension of the three tension springs 202 is less than the elastic force of the three positioning springs 108; the three grading columns 201 are respectively used to manually press the three limit The locking control part 3 includes: a locking sliding cylinder 301 and an electromagnet 302. There are two locking sliding cylinders 301, and the two locking sliding cylinders 301 are fixedly installed above the second-level ruler 102 and the third-level ruler 103 respectively; the two locking sliding cylinders 301 are respectively fixedly installed with electromagnets 302; the two in-position switches 203 are electrically connected to the power supply and the electromagnet 302 located above them in turn; the locking control part 3 also includes: a locking spring 303 and a plug-in column 304, and the two locking sliding cylinders 301 are respectively sleeved with locking springs 303; the two locking sliding cylinders 301 are respectively slidably plugged with plug-in columns 304, and the two plug-in columns 304 are respectively slidably plugged into the third-level ruler 103 and the end ruler 104 The side; the plug-in column 304 is used to control the priority extension of the secondary ruler 102; the two locking springs 303 are respectively connected between the plug-in column 304 and the electromagnet 302 on the same side, and the locking control component 3 is used in conjunction with the graded detection component 2 to realize the control of the staff when extending the surveying tower ruler 1. It is necessary to ensure that the secondary ruler 102, the tertiary ruler 103, and the end ruler 104 are fully extended in sequence. When the secondary ruler 102 is not fully extended, the tertiary ruler 103 and the end ruler 104 cannot be extended together. It can be used to control the operation standardization of the staff and avoid directly extending the tertiary ruler 103 and the end ruler 104, which causes the reading to be the data on the tertiary ruler 103 or the end ruler 104, and the problem of wrong surveying and mapping data, which can ensure the surveying and mapping quality. The structure is simple and the staff can operate it without feeling. During actual operation, in conjunction with the plug-in positioning of the plug-in column 304, the second-level ruler 102 can only be manually pulled out first. At this time, the second-level ruler 102 drives the limit column 107 on the second-level ruler 102 to be inserted into the first-level ruler 101. At this time, the tension spring 202 pulls the grading column 201 to drive the in-place switch 203 to squeeze and fit the limit column 107. At this time, the in-place switch 203 controls the electromagnet 302 located above it to energize. At this time, the electromagnet 302 magnetically attracts the plug-in column 304. At this time, the plug-in column 304 below is pulled out from the third-level ruler 103, that is, the third-level ruler 103 can be normally extended at this time, which also ensures that the third-level ruler 103 can be extended only after the stable positioning of the second-level ruler 102 after extension.

[0024] The second embodiment, based on the first embodiment, includes: a traction mounting plate 401, a guide rope 402 and a limit ball 403, the traction mounting plate 401 is fixedly mounted on the top of the end scale 104; a through hole is provided on the traction mounting plate 401; a guide rope 402 is inserted into the through hole on the traction mounting plate 401; a limit ball 403 is fixedly installed at the tail of the guide rope 402, and the limit ball 403 is used for counterweight; the length of the guide rope 402 is determined according to demand; the counterweight positioning member 5 includes: a counterweight ball 501, a connecting column 5011 and a ground insertion shaft 5012, a connecting column 5011 is fixedly mounted on the counterweight ball 501, and the end of the connecting column 5011 is fixedly mounted on the guide rope 402; the counterweight ball 501 is used for counterweight, and a ground insertion shaft 5012 is fixedly mounted on the bottom of the counterweight ball 501, and the bottom two sides of the ground insertion shaft 5012 are inclined structures; the ground insertion shaft 5012 is used to be inserted into the ground; the length of the ground insertion shaft 5012 can be determined according to the soil The loose situation is lengthened to prevent it from falling off; the counterweight ball 501 is used to increase the stability of the ground insertion shaft 5012 after it is inserted into the ground; the counterweight positioning part 5 also includes: a prompt light 502, and a prompt light 502 is fixedly installed on the connecting column 5011. The prompt light 502 is externally connected to a battery power supply. The counterweight positioning part 5 is used in conjunction with the connecting plate 602 to facilitate the staff to locate the point more quickly when actually using the total station to find the point. The staff can plan the next surveying and mapping point in advance without the need to put lime and other prompts to avoid pollution and make it easier for the staff to find the point, preventing the wrong surveying and mapping point selection due to lack of communication and other factors. The structure is simple and reasonable, and the operation is more convenient. When switching to the next point for surveying, follow the guidance of the guide rope 402. At this time, you can directly move the V-shaped notch on the side of the connecting plate 602 to fit the ground insertion shaft 5012. At this time, keep the first-level ruler 101 vertical to carry out surveying and mapping, and changing surveying points is more convenient and fast.

[0025] The working principle of this embodiment is as follows: First, according to the surveying height requirement, the second-level ruler 102, the third-level ruler 103 and the end ruler 104 can be manually pulled out in sequence. When the second-level ruler 102, the third-level ruler 103 and the end ruler 104 are extended, the positioning spring 108 can squeeze and push the limit column 107, extend and insert it into the socket of the graded column 201 installed on the first-level ruler 101, the second-level ruler 102 and the third-level ruler 103 to achieve positioning and ensure stability after extension. When the limit needs to be released later, the graded column 201 can be manually pressed. The limit post 107 is squeezed and retracted to realize the limit release; the arc structure at the end of the limit post 107 is used to facilitate squeezing the in-place switch 203. During actual operation, in conjunction with the plug-in positioning of the plug-in post 304, the secondary ruler 102 can only be manually pulled out first. At this time, the secondary ruler 102 drives the limit post 107 on the secondary ruler 102 to be inserted into the primary ruler 101. At this time, the tension spring 202 pulls the grading column 201 to drive the in-place switch 203 to squeeze and fit the limit post 107. At this time, the in-place switch 203 controls the electromagnet 302 located above it to be energized. The magnet 302 magnetically attracts the plug-in post 304. At this time, the lower plug-in post 304 is pulled out from the three-stage ruler 103. That is, the three-stage ruler 103 can be normally extended at this time. It also ensures that the stable positioning of the second-stage ruler 102 after extension can be carried out before the three-stage ruler 103 is extended. After the three-stage ruler 103 is extended into place, the limit post 107 on the three-stage ruler 103 can be squeezed and fitted with the middle in-place switch 203. At this time, the upper electromagnet 302 can be electromagnetically attracted to pull out the plug-in post 304 inserted in the end ruler 104. At this time, it can be pulled out. The end ruler 104 is extended step by step, with a simple and reasonable structure, and does not affect the normal retraction and storage of the structure. When surveying the current surveying point, another staff member directly inserts the ground-inserting shaft 5012 into the ground to locate the next surveying point in advance. The prompt light 502 will light up as a prompt. When switching to the next point for surveying, even if the distance is far, following the guidance of the guide rope 402, the ground-inserting shaft 5012 can be directly moved into the V-shaped notch on the side of the connecting plate 602 to fit the ground-inserting shaft 5012. At this time, keep the first-level ruler 101 vertical to cooperate with the total station for surveying.

[0026] It should be noted that, in this document, relational terms such as first and second, etc., are used only to distinguish one entity or operation from another entity or operation, and do not necessarily require or imply any actual relationship or order between these entities or operations. Moreover, the terms "comprises," "comprising," or any other variations thereof are intended to cover non-exclusive inclusion, such that a process, method, article, or apparatus that includes a list of elements includes not only those elements but also other elements not explicitly listed, or elements inherent to such process, method, article, or apparatus.

[0027] While embodiments of the present invention have been shown and described, it will be appreciated by those skilled in the art that various changes, modifications, substitutions, and variations may be made to these embodiments without departing from the principles and spirit of the invention, and that the scope of the invention is defined by the appended claims and their equivalents.

Claims

1. A land reserve surveying and mapping device, comprising a surveying and mapping tower scale (1), wherein a grading detection component (2) is mounted on the surveying and mapping tower scale (1), and characterized in that: The graded detection member (2) is used to control the step-by-step extension and retraction of the surveying and mapping tower ruler member (1); a locking control member (3) is installed on the surveying and mapping tower ruler member (1); the locking control member (3) is used to lock the surveying and mapping tower ruler member (1); A traction member (4) is installed on the surveying tower ruler member (1); a counterweight positioning member (5) is installed on the traction member (4); the traction member (4) is used for vertical line positioning; A point finding and positioning member (6) is installed at the bottom of the surveying and mapping tower ruler (1); the point finding and positioning member (6) is used to facilitate point finding by the total station; The surveying tower ruler component (1) comprises: a first-level ruler (101), a level bubble (105) fixedly mounted on the side of the first-level ruler (101); and a handle provided on the first-level ruler (101).

2. A land reserve surveying and mapping device according to claim 1, characterized in that: The surveying tower ruler (1) comprises: a second-level ruler (102), a third-level ruler (103) and an end ruler (104); the first-level ruler (101), the second-level ruler (102), the third-level ruler (103) and the end ruler (104) are provided with scales; the first-level ruler (101) is slidably plugged with the second-level ruler (102); the second-level ruler (102) is slidably plugged with the third-level ruler (103); the end ruler (104) is slidably plugged with the third-level ruler (103); the first-level ruler (101), the second-level ruler (102) are slidably plugged with the end ruler (104); ), the third-level ruler (103), and the end ruler (104) are respectively fixedly embedded with an indicator light strip (106); the bottoms of the second-level ruler (102), the third-level ruler (103), and the end ruler (104) are respectively slidably plugged with limiting columns (107), and the tails of the three limiting columns (107) are respectively fixedly installed with positioning springs (108), and the three positioning springs (108) are respectively located inside the second-level ruler (102), the third-level ruler (103), and the end ruler (104); the end of the limiting column (107) is an arc structure.

3. The land reserve surveying and mapping device according to claim 2, characterized in that: The grading detection member (2) comprises: a grading column (201), wherein three grading columns (201) are provided, and the three grading columns (201) are respectively slidably inserted above the first-level ruler (101), the second-level ruler (102) and the third-level ruler (103); the grading columns (201) are aligned with the limit column (107); the three grading columns (201) are respectively sleeved with tension springs (202), and the three tension springs (202) are respectively connected between the three grading columns (201) and the side surfaces of the first-level ruler (101), the second-level ruler (102) and the third-level ruler (103); in-position switches (203) are respectively fixedly installed on the inner sides of the two lower grading columns (201); the tension of the three tension springs (202) is less than the elastic force of the three positioning springs (108); and the three grading columns (201) are respectively used to manually press the three limit columns (107).

4. The land reserve surveying and mapping device according to claim 3, characterized in that: The locking control member (3) comprises: a locking sliding cylinder (301), wherein two locking sliding cylinders (301) are provided, and the two locking sliding cylinders (301) are respectively fixedly mounted above the second-level ruler (102) and the third-level ruler (103); an electromagnet (302) is respectively fixedly mounted on the two locking sliding cylinders (301); and the two in-position switches (203) are electrically connected in sequence to the electromagnet (302) located above them.

5. The land reserve surveying and mapping device according to claim 4, characterized in that: The locking control member (3) further comprises: a locking spring (303), wherein the two locking sliding cylinders (301) are respectively sleeved with a locking spring (303); the two locking sliding cylinders (301) are respectively slidably plugged with a plug-in column (304), and the two plug-in columns (304) are respectively slidably plugged into the sides of the third-stage ruler (103) and the end ruler (104); the plug-in column (304) is used to control the priority extension of the second-stage ruler (102); and the two locking springs (303) are respectively connected between the plug-in column (304) and the electromagnet (302) on the same side.

6. The land reserve surveying and mapping device according to claim 2, characterized in that: The traction member (4) comprises: a traction mounting plate (401), the traction mounting plate (401) being fixedly mounted on the top of the end scale (104); a through hole being provided on the traction mounting plate (401); a guide rope (402) being inserted into the through hole on the traction mounting plate (401); a limiting ball (403) being fixedly mounted on the tail of the guide rope (402), the limiting ball (403) being used for counterweight.

7. The land reserve surveying and mapping device according to claim 6, characterized in that: The counterweight positioning member (5) comprises a counterweight ball (501), a connecting column (5011) fixedly mounted on the counterweight ball (501), and an end of the connecting column (5011) fixedly mounted on the guide rope (402); the counterweight ball (501) is used for counterweighting; a ground insertion shaft (5012) is fixedly mounted on the bottom of the counterweight ball (501), and both sides of the bottom of the ground insertion shaft (5012) are inclined surface structures; the ground insertion shaft (5012) is used for being inserted into the ground.

8. The land reserve surveying and mapping device according to claim 7, characterized in that: The counterweight positioning member (5) further comprises a warning light (502), and the warning light (502) is fixedly mounted on the connecting column (5011).

9. The land reserve surveying and mapping device according to claim 7, characterized in that: The point-finding and positioning member (6) comprises: a ball stud (601) and a connecting disk (602), wherein the ball stud (601) is fixedly mounted on the bottom of the first-level ruler (101); the bottom of the ball stud (601) is a ball head structure; the connecting disk (602) is provided with a spherical hole; the ball head at the bottom of the ball stud (601) is sleeved in the spherical hole on the connecting disk (602); the connecting disk (602) is provided with a circle of through grooves; a V-shaped notch is provided on the side of the connecting disk (602); and a ground insertion shaft (5012) is fitted into the V-shaped notch on the side of the connecting disk (602).

10. The land reserve surveying and mapping device according to claim 9, characterized in that: The point-finding positioning member (6) comprises: positioning columns (603); a circle of positioning columns (603) is fixedly mounted on the bottom of the connection plate (602); the bottoms of the circle of positioning columns (603) are respectively tapered; the positioning columns (603) are used for inserting into the ground to prevent slipping.

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