Horizontal measuring instrument for surveying and mapping and measuring method

Abstract

The invention discloses a horizontal measuring instrument for surveying and mapping and a measuring method and belongs to the technical field of horizontal measuring instruments. The device comprises a mounting platform, a first mounting frame is fixedly connected to the top of the mounting platform, a first rotating shaft is fixedly connected to the side wall of the first mounting frame, a second connecting frame is rotatably connected to the outer wall of the first rotating shaft, a spherical groove is formed in the top of the mounting platform, and a leveling mechanism is arranged on the side wall of the second connecting frame; the spherical groove is arranged on the base so that the measuring instrument can be rapidly leveled and locked during measurement, and a protection mechanism is arranged on the inner wall of the spherical groove so that the measuring instrument can be automatically protected when equipment inclines and falls. The horizontal measuring instrument is transversely and longitudinally balanced through the gravity action of the pull rope and the leveling ball, the handle is loosened to lock the rotating shaft, leveling is completed, the measuring precision is ensured, locking can be quickly unlocked by pulling the horizontal frame, leveling work of the horizontal measuring instrument can be quickly carried out, and the working efficiency is improved.

Description

Technical Field

[0001] The present invention relates to the technical field of level measuring instruments, and in particular to a level measuring instrument for surveying and mapping and a measuring method. Background Art

[0002] Engineering surveying refers to the general term for all surveying and mapping work in engineering construction, including various surveying work carried out in the survey, design, construction and management stages of engineering construction. Surveying work usually requires the use of measuring instruments to measure various types of physical quantities, including length, angle, elevation, coordinates, etc., and the measuring instruments can ensure the accuracy, reliability and efficiency of the measurement. The mounting device can provide stable support and fixation to ensure that the measuring instrument maintains a stable position and direction during the measurement process.

[0003] Traditional level measurement requires the use of a level and a spirit level. This method requires the cooperation of two people, one person holds the level to take readings, and the other is responsible for moving the spirit level to the measured point, then recording the elevation data and calculating the level. In the process of moving the spirit level to the measurement position, the spirit level needs to be kept vertically level with each measurement position, and the process of adjusting the vertical level of the spirit level is too cumbersome.

[0004] After the horizontal measuring instrument is placed in the appropriate position, the level of the measuring instrument needs to be adjusted. However, most of the current horizontal measuring instruments do not have the function of automatic adjustment. Generally, two people are required to cooperate, one person operates the level to read the reading, and the other is responsible for moving the level ruler to the measured point, and then recording the elevation data and calculating the level. In the process of moving the level ruler to the measuring position, the level ruler needs to be kept vertically level with each measuring position. The process of adjusting the vertical level of the level ruler is too cumbersome, which seriously delays the work efficiency of the measurement work. At the same time, the existing horizontal measuring instruments need to be placed in the measurement area for a long time when in use, which increases the risk of the equipment being accidentally touched and dropped, and do not have the function of protecting the equipment, which increases the risk of equipment damage due to human negligence or unresponsiveness. Summary of the invention

[0005] The purpose of the present invention is to solve the problem of lack of protection when equipment is accidentally knocked and dropped during the measurement process, and to propose a level measuring instrument for surveying and mapping and a measuring method.

[0006] In order to achieve the above-mentioned object, the present invention adopts the following level measuring instrument for surveying and mapping, comprising a mounting platform, a first mounting frame is fixedly connected to the top of the mounting platform, a first rotating shaft is fixedly connected to the side wall of the first mounting frame, a second connecting frame is rotatably connected to the outer wall of the first rotating shaft, and a spherical groove is opened on the top of the mounting platform; The side wall of the second connecting frame is provided with a leveling mechanism so that the measuring instrument can be quickly leveled and locked when measuring; The inner wall of the spherical groove is provided with a protection mechanism so as to automatically protect the measuring instrument when the device tilts and falls.

[0007] Further, the leveling mechanism includes a fixed block, and the side wall of the fixed block is fixedly connected to a first tension spring, the first tension spring is fixedly connected to a handle on the side away from the fixed block, and the side wall of the handle is fixedly connected to an extrusion block, and the two side walls corresponding to the fixed block are fixedly connected to second tension springs, one of the second tension springs is fixedly connected to a first stop block at one end away from the fixed block, and the other second tension spring is fixedly connected to a second stop block at one end away from the fixed block.

[0008] Further, the outer wall of the second connecting frame is slidably connected to the first slider, and the end of the first slider corresponds to the end inclined surface of the first stop block, the inner wall of the second connecting frame is slidably connected to the second slider, and the end of the second slider corresponds to the end inclined surface of the second stop block, the outer wall of the second slider is fixedly connected to the third tension spring, and the end of the third tension spring away from the second slider is fixedly connected to the side wall of the second connecting frame, the outer wall of the first slider is fixedly connected to the fourth tension spring, and the end of the fourth tension spring away from the first slider is fixedly connected to the outer wall of the second connecting frame.

[0009] Furthermore, the corresponding two side walls of the second connecting frame are both rotatably connected with second rotating shafts, a horizontal frame is fixedly connected between the two second rotating shafts, and a leveling ball is fixedly connected to the bottom center of the horizontal frame via a pull rope.

[0010] Furthermore, the end of the first sliding block corresponds to the outer wall of the second rotating shaft, the end of the second sliding block corresponds to the outer wall of the first rotating shaft, and the leveling ball extends to the inside of the spherical groove through a pull rope.

[0011] Furthermore, the protective mechanism includes a clamping rod, and a sliding groove is formed through the side wall of the clamping rod, the inner wall of the sliding groove is slidably connected to the sliding rod, and the outer wall of the sliding rod is fixedly connected to a limiting block, one end of the clamping rod is fixedly connected to a fifth tension spring, and the end of the fifth tension spring away from the clamping rod is fixedly connected to the inside of the mounting platform, the inner wall of the spherical groove is slidably connected to a clamping ring, and the bottom of the clamping ring is provided with a clamping groove that is clamped to the end of the clamping rod.

[0012] Furthermore, the outer wall of the clamping rod passes through and is slidably connected to the inside of the mounting platform, the end of the clamping rod away from the clamping ring is fixedly connected to a reset rod, the outer wall of the reset rod passes through and is slidably connected to the inside of the mounting platform, the outer wall of the mounting platform is rotatably connected to a protective plate at a position corresponding to the limit block through a torsion spring, and the side wall of the protective plate is provided with a clamping groove that is clamped to the end of the limit block.

[0013] Furthermore, a level measuring instrument is fixedly mounted on the inner wall of the horizontal frame, and a plurality of brackets are hingedly mounted on the bottom of the mounting platform.

[0014] The present application also provides a level measurement method for surveying and mapping, comprising the following steps: S1: Installation: Open the bracket to expand the contact surface, extend the sleeve to adapt to the terrain, place the equipment in the measurement area, manually rotate the protective plate, press the reset rod, slide the clamping rod, stretch the fifth tension spring to apply force, slide the slide bar along the slide groove, slide the limit block down, clamp the clamping rod to engage the clamping ring, and fix the protective plate under the installation platform to complete the installation before measurement; S2: Leveling measurement: by pulling the handle, the extrusion block is driven to move, the first tension spring is stretched, the extrusion block moves to make the first and second resisting blocks slide, and the limit of the first and second sliders is released. After the first and second sliders slide, the second rotating shaft and the first rotating shaft can rotate freely, the horizontal frame rotates with the second rotating shaft as the axis to provide lateral balance for the level measuring instrument, and the second connecting frame rotates with the first rotating shaft as the axis to provide longitudinal balance, thereby completing rapid leveling, and then releasing the handle to achieve locking of the second rotating shaft and the first rotating shaft; S3: Fall protection: The leveling ball is suspended in the spherical groove. When the equipment is tilted, it can roll and hit the clamping ring. The clamping ring slides off the clamping rod due to the impact. The tension of the fifth tension spring is reset to drive the clamping rod to slide. The slide groove slides along the slide rod, and the limit block slides up and off the protective plate. Then the protective plate is no longer restricted, and the torsion spring drives it to rotate upward quickly to surround the second connecting frame, thereby protecting the level measuring instrument.

[0015] Compared with the prior art, the above solution has the following beneficial effects: 1. When measuring, the horizontal frame provides pulling force to the leveling ball through the pull rope, and then the leveling ball will pull the horizontal frame to rotate with the second rotating shaft as the axis through gravity, so that the horizontal frame can provide lateral balance for the level measuring instrument after rotation. After the second stop block slides, its end will be separated from the contact with the outer wall of the first rotating shaft, driving the second connecting frame to provide longitudinal balance for the level measuring instrument after rotation, thereby completing the leveling of the level measuring instrument. After that, release the pull on the handle to complete the locking of the first rotating shaft and the second rotating shaft, thereby completing the leveling of the level measuring instrument, thereby keeping the level measuring instrument stable during the measurement process, preventing the level measuring instrument from tilting during the measurement process, ensuring the accuracy of the measurement process, and releasing the lock by pulling the horizontal frame, the level measuring instrument can be quickly leveled, thereby improving work efficiency.

[0016] 2. When the equipment is tilted and about to fall, the leveling ball will roll along the inner wall of the spherical groove and then hit the clamping ring, causing the clamping ring to lose contact with the clamping rod, thereby driving the clamping rod to slide into the inside of the mounting platform and slide along the inside of the slide rod through the slide groove. After that, the limit block will slide and lose contact with the protective plate. At this time, the protective plate is no longer limited by the clamping of the limit block, so it is driven to rotate through the torsion spring connected to the mounting platform. Then multiple protective plates will rotate upward quickly. After the rotation of multiple protective plates is completed, the periphery of the second connecting frame can be surrounded, thereby protecting the level measuring instrument, greatly reducing the risk of equipment damage due to human negligence or unresponsiveness. BRIEF DESCRIPTION OF THE DRAWINGS

[0017] Figure 1 The measurement flow chart proposed by the present invention; Figure 2 It is a schematic diagram of the overall structure proposed by the present invention; Figure 3 It is a schematic diagram of the local structure proposed by the present invention; Figure 4 This is a schematic diagram of the first part of the structure of the leveling mechanism proposed by the present invention; Figure 5 It is a schematic diagram of the second part of the structure of the leveling mechanism proposed by the present invention; Figure 6 The present invention proposes Figure 5 A magnified image of point A; Figure 7 This is a schematic diagram of the third part of the structure of the leveling mechanism proposed by the present invention; Figure 8 It is a structural schematic diagram of the protection mechanism proposed by the present invention; Fig. 9 The present invention proposes Figure 8 Enlarged view of point B.

[0018] The markings in the accompanying drawings are: 1. mounting platform; 2. first mounting frame; 3. first rotating shaft; 4. second connecting frame; 5. leveling mechanism; 6. spherical groove; 7. protective mechanism; 8. level measuring instrument; 9. bracket; 501. fixing block; 502. first tension spring; 503. handle; 504. squeezing block; 505. second tension spring; 506. first resist block; 507. first sliding block; 508. second resist block; 509. second sliding block; 510. third tension spring; 511. fourth tension spring; 512. second rotating shaft; 513. horizontal frame; 514. leveling ball; 701. clamping rod; 702. slide groove; 703. slide rod; 704. limit block; 705. fifth tension spring; 706. clamping ring; 707. reset rod; 708. protective plate. DETAILED DESCRIPTION

[0019] The technical solutions in the embodiments of the present invention will be described clearly and completely below in conjunction with the drawings in the embodiments of the present invention. Obviously, the described embodiments are only part of the embodiments of the present invention, rather than all the embodiments.

[0020] In the description of the present invention, it should be understood that the terms "upper", "lower", "top surface", "bottom surface" and the like indicate positions or positional relationships based on the positions or positional relationships shown in the drawings, and are only for the convenience of describing the present invention and simplifying the description, rather than indicating or implying that the positions or elements referred to must have a specific orientation, be constructed and operate in a specific orientation, and therefore cannot be understood as limitations of the present invention. In addition, the terms "first" and "second" are only used to distinguish an entity or operation from another entity or operation, and do not require or imply any actual relationship, order or relative importance between these entities or operations.

[0021] For example, see Figure 1-2 , Figure 8-9 A level measuring instrument for surveying and mapping, comprising a mounting platform 1, a first mounting frame 2 is fixedly connected to the top of the mounting platform 1, a first rotating shaft 3 is fixedly connected to the side wall of the first mounting frame 2, a second connecting frame 4 is rotatably connected to the outer wall of the first rotating shaft 3, a spherical groove 6 is opened on the top of the mounting platform 1, a level measuring instrument 8 is fixedly installed on the inner wall of the horizontal frame 513, and a plurality of brackets 9 are hingedly connected to the bottom of the mounting platform 1; When it is necessary to measure the levelness of the ground, the user places the device in the area to be measured, and then expands the range of the device contacting the ground by opening multiple brackets 9, and then extends the sleeve inside the bracket 9 according to the height required for measurement, which can be more suitable for measurement work on different terrains. Then, the device is placed in the measurement area, and the preliminary installation of the device is completed by contacting the bottom of multiple brackets 9 with the ground. Then, the protective plate 708 is manually rotated to rotate the multiple protective plates 708 downward, and then the reset rod 707 is manually pressed. Then, the reset rod 707 drives the clamping rod 701 to slide inside the installation platform 1, and at the same time, the fifth tension spring 705 continues to stretch, and then the fifth tension spring 705 The force generated by the stretching will continue to apply tension to the clamping rod 701, and at the same time, the sliding rod 703 will slide along the inner wall of the sliding groove 702, so that the sliding groove 702 slides downward with the limiting block 704. When sliding to a certain position, the other end of the clamping rod 701 will be engaged in the corresponding clamping groove at the bottom of the clamping ring 706, and then the clamping rod 701 will be stuck, thereby completing the limitation of the clamping rod 701. At this time, the bottom of the limiting block 704 will be engaged in the corresponding clamping groove on the side wall of the protective plate 708, thereby completing the fixation of the protective plate 708. By engaging multiple protective plates 708 at the lower position of the installation platform 1, the measurement work will not be hindered, thereby completing the installation work before measurement.

[0022] For example 2, please refer to Figure 3-7 , based on the first embodiment, in this embodiment, the side wall of the second connecting frame 4 is provided with a leveling mechanism 5, so that the measuring instrument can be quickly leveled and locked when measuring; The leveling mechanism 5 includes a fixed block 501, and a first tension spring 502 is fixedly connected to the side wall of the fixed block 501, a handle 503 is fixedly connected to the side of the first tension spring 502 away from the fixed block 501, and an extrusion block 504 is fixedly connected to the side wall of the handle 503, and the corresponding two side walls of the fixed block 501 are fixedly connected to second tension springs 505, one end of the second tension spring 505 away from the fixed block 501 is fixedly connected to a first stop block 506, and the other end of the second tension spring 505 away from the fixed block 501 is fixedly connected to a second stop block 508, the outer wall of the second connecting frame 4 is slidably connected to a first slider 507, and the end of the first slider 507 corresponds to the end inclined surface of the first stop block 506, and the inner wall of the second connecting frame 4 is slidably connected to a second slider 509, and the end of the second slider 509 is aligned with the second stop block 508 The end inclined surface corresponds to that of the second slider 509, the outer wall of the second slider 509 is fixedly connected with a third tension spring 510, and the end of the third tension spring 510 away from the second slider 509 is fixedly connected to the side wall of the second connecting frame 4, the outer wall of the first slider 507 is fixedly connected with a fourth tension spring 511, and the end of the fourth tension spring 511 away from the first slider 507 is fixedly connected to the outer wall of the second connecting frame 4, the corresponding two side walls of the second connecting frame 4 are penetrated and rotatably connected with a second rotating shaft 512, a horizontal frame 513 is fixedly connected between the two second rotating shafts 512, and a leveling ball 514 is fixedly connected to the bottom center of the horizontal frame 513 through a pull rope, the end of the first slider 507 corresponds to the outer wall of the second rotating shaft 512, the end of the second slider 509 corresponds to the outer wall of the first rotating shaft 3, and the leveling ball 514 extends to the inside of the spherical groove 6 through the pull rope; After the installation work is completed, the level measuring instrument 8 needs to be leveled before measurement. Then, the extrusion block 504 is moved outward by pulling the handle 503. During the process, the first tension spring 502 will be stretched, thereby exerting a pulling force on the handle 503. When the extrusion block 504 moves outward, the second tension spring 505 will drive the first stop block 506 and the second stop block 508 corresponding to its end to be pulled toward the direction of the fixed block 501. Then, after the first stop block 506 slides, the first slider 507 is no longer limited by the first stop block 506. Then, the first slider 507 is driven upward by the tension of the fourth tension spring 511. When the level gauge 8 is fixedly mounted on the horizontal frame 513, and the horizontal frame 513 provides a pulling force to the leveling ball 514 through the pull rope, the leveling ball 514 will then pull the horizontal frame 513 to rotate around the second rotating shaft 512 through gravity, so that the horizontal frame 513 can provide lateral balance for the level gauge 8 after rotation. At the same time, after the second stop block 508 slides, the second slider 509 is no longer limited by the second stop block 508, and then the second slider 509 is driven by the pulling force of the third tension spring 510. The slider 509 slides outward, and when the second slider 509 slides, its end will be out of contact with the outer wall of the first rotating shaft 3. At this time, the first rotating shaft 3 is no longer limited and can rotate automatically. Then the leveling ball 514 will pull the second connecting frame 4 to rotate around the first rotating shaft 3 through gravity. Then the second connecting frame 4 will provide longitudinal balance for the level meter 8 after rotation. At this time, the leveling of the level meter 8 is completed, and then the pull on the handle 503 is released. Then the squeezing block 504 will be driven to move through the first tension spring 502, and then the inclined surface of the squeezing block 504 will squeeze the first stop block 506 and the second stop block 508 during the movement. The first stop block 506 drives the first slider 507 to squeeze the outer wall of the second shaft 512, so that the first shaft 3 can no longer rotate. At the same time, the second stop block 508 drives the second slider 509 to squeeze the outer wall of the first shaft 3, so that the second shaft 512 can no longer rotate. At this time, the leveling mechanism 5 can no longer drive the level measuring instrument 8 to move, thereby completing the rapid leveling of the level measuring instrument 8. After the leveling is completed, the first shaft 3 and the second shaft 512 can be directly locked, so that the level measuring instrument 8 can remain stable during the measurement process, preventing the level measuring instrument 8 from tilting during the measurement process, thereby ensuring the accuracy of the measurement process.

[0023] For example 3, please refer to Figure 8-9 On the basis of the second embodiment, in this embodiment, a protective mechanism 7 is provided on the inner wall of the spherical groove 6 so as to automatically protect the measuring instrument when the device tilts and falls; The protection mechanism 7 includes a clamping rod 701, and a sliding groove 702 is formed through the side wall of the clamping rod 701, a sliding rod 703 is slidably connected to the inner wall of the sliding groove 702, and a limiting block 704 is fixedly connected to the outer wall of the sliding rod 703, a fifth tension spring 705 is fixedly connected to one end of the clamping rod 701, and the end of the fifth tension spring 705 away from the clamping rod 701 is fixedly connected to the inside of the mounting platform 1, a clamping ring 706 is slidably connected to the inner wall of the spherical groove 6, and a clamping ring 706 is formed at the bottom A slot is clamped with the end of the clamping rod 701, the outer wall of the clamping rod 701 penetrates and is slidably connected to the inside of the mounting platform 1, the end of the clamping rod 701 away from the clamping ring 706 is fixedly connected with a reset rod 707, the outer wall of the reset rod 707 penetrates and is slidably connected to the inside of the mounting platform 1, and the outer wall of the mounting platform 1 is rotatably connected with a protective plate 708 at a position corresponding to the limit block 704 through a torsion spring, and the side wall of the protective plate 708 is provided with a slot clamped with the end of the limit block 704; During the measurement process, since the device needs to be placed in the measurement area for a long time, accidental collisions may occur, which may cause the device to tilt and fall. At this time, the leveling ball 514 is suspended inside the spherical groove 6. When the device tilts, the leveling ball 514 will roll along the inner wall of the spherical groove 6 according to the tilt, and then when the spherical groove 6 rolls a certain distance, it will hit the clamping ring 706. After the clamping ring 706 is hit, it will slide along the inner wall of the spherical groove 6 away from the clamping rod 701, and then the clamping ring 706 will be out of contact with the clamping rod 701. At this time, the end of the clamping rod 701 is no longer engaged with the clamping ring 706, and then the fifth tension spring 705 will The pulling force is reset, thereby driving the clamping rod 701 to slide into the interior of the installation platform 1, and at the same time slide along the interior of the slide rod 703 through the slide groove 702, thereby driving the limit block 704 to slide upward. After the limit block 704 slides, it will be out of contact with the protective plate 708. At this time, the protective plate 708 is no longer limited by the clamping of the limit block 704, so it is driven to rotate through the torsion spring connected to the installation platform 1, and then multiple protective plates 708 will rotate upward quickly. After the rotation of multiple protective plates 708 is completed, the periphery of the second connecting frame 4 can be surrounded, thereby protecting the level measuring instrument 8 and effectively preventing the subsequent fall from causing damage to the level measuring instrument 8.

[0024] The measuring method of the present invention is as follows: before measuring, the level measuring instrument 8 needs to be leveled, and then the squeezing block 504 is driven to move outward by pulling the handle 503. During the process, the first tension spring 502 will be stretched, thereby continuously applying tension to the handle 503. When the squeezing block 504 moves outward, the second tension spring 505 will drive the first and second resistance blocks 506 and 508 corresponding to its ends to be pulled toward the fixed block 501. Then, after the first resistance block 506 slides, the first slider 507 is no longer limited by the first resistance block 506, and then it will be pulled by the fourth tension spring 511. The force drives the first slider 507 to slide upward. When the first slider 507 slides, its bottom will be out of contact with the outer wall of the second rotating shaft 512. At this time, the second rotating shaft 512 is no longer limited and can rotate automatically. By fixing the level measuring instrument 8 on the horizontal frame 513, and the horizontal frame 513 provides a pulling force to the leveling ball 514 through the pull rope, the leveling ball 514 will then pull the horizontal frame 513 to rotate around the second rotating shaft 512 as the axis through gravity, so that the horizontal frame 513 can provide lateral balance for the level measuring instrument 8 after rotation. At the same time, after the second stop block 508 slides, this When the second slider 509 is no longer limited by the second stop block 508, the second slider 509 is then driven to slide outward by the tension of the third tension spring 510. When the second slider 509 slides, its end portion will be out of contact with the outer wall of the first rotating shaft 3. At this time, the first rotating shaft 3 is no longer limited and can rotate automatically. Then the leveling ball 514 will pull the second connecting frame 4 to rotate around the first rotating shaft 3 through gravity. Then, after the rotation, the second connecting frame 4 will provide longitudinal balance for the level measuring instrument 8. At this time, the leveling work of the level measuring instrument 8 is completed, and then the pull on the handle 503 is released, and then the The first tension spring 502 drives the extrusion block 504 to move, and then the inclined surface of the extrusion block 504 will squeeze the first stop block 506 and the second stop block 508 during the movement, so that the first stop block 506 drives the first slider 507 to squeeze the outer wall of the second shaft 512, so that the first shaft 3 can no longer rotate, and at the same time, the second stop block 508 drives the second slider 509 to squeeze the outer wall of the first shaft 3, so that the second shaft 512 can no longer rotate. At this time, the leveling mechanism 5 can no longer drive the level measuring instrument 8 to move, thereby completing the rapid leveling of the level measuring instrument 8; During the measurement process, since the device needs to be placed in the measurement area for a long time, accidental collisions may occur, which may cause the device to tilt and fall. At this time, the leveling ball 514 is suspended inside the spherical groove 6. When the device tilts, the leveling ball 514 will roll along the inner wall of the spherical groove 6 according to the tilt, and then when the spherical groove 6 rolls a certain distance, it will hit the clamping ring 706. After the clamping ring 706 is hit, it will slide along the inner wall of the spherical groove 6 away from the clamping rod 701, and then the clamping ring 706 will be out of contact with the clamping rod 701. At this time, the end of the clamping rod 701 is no longer engaged with the clamping ring 706, and then the fifth tension spring 705 will The pulling force is reset, thereby driving the clamping rod 701 to slide into the interior of the installation platform 1, and at the same time slide along the interior of the slide rod 703 through the slide groove 702, thereby driving the limit block 704 to slide upward. After the limit block 704 slides, it will be out of contact with the protective plate 708. At this time, the protective plate 708 is no longer limited by the clamping of the limit block 704, so it is driven to rotate through the torsion spring connected to the installation platform 1, and then multiple protective plates 708 will rotate upward quickly. After the rotation of multiple protective plates 708 is completed, the periphery of the second connecting frame 4 can be surrounded, thereby protecting the level measuring instrument 8 and effectively preventing the subsequent fall from causing damage to the level measuring instrument 8.

[0025] It should be noted that the various devices in this application are common devices in the market, and can be selected according to specific needs during specific use. The circuit connection relationship of each device belongs to a simple series and parallel connection circuit. There is no innovation in the circuit connection part. Those skilled in the art can implement it relatively easily. It belongs to the existing technology and will not be elaborated on.

[0026] Although the present invention is disclosed as above, the present invention is not limited thereto. Any person skilled in the art can make various changes and modifications without departing from the spirit and scope of the present invention. Therefore, the protection scope of the present invention shall be subject to the scope defined by the claims.

Claims

1. A level measuring instrument for surveying and mapping, comprising a mounting platform (1), characterized in that: The top of the installation platform (1) is fixedly connected to a first installation frame (2), and the side wall of the first installation frame (2) is fixedly connected to a first rotating shaft (3), the outer wall of the first rotating shaft (3) is rotatably connected to a second connecting frame (4), and the top of the installation platform (1) is provided with a spherical groove (6); The side wall of the second connecting frame (4) is provided with a leveling mechanism (5) so as to quickly level and lock the measuring instrument when measuring; The inner wall of the spherical groove (6) is provided with a protection mechanism (7) to automatically protect the measuring instrument when the device tilts and falls.

2. A level measuring instrument for surveying and mapping according to claim 1, characterized in that: The leveling mechanism (5) comprises a fixed block (501), and a first tension spring (502) is fixedly connected to a side wall of the fixed block (501), a handle (503) is fixedly connected to the side of the first tension spring (502) away from the fixed block (501), and a squeezing block (504) is fixedly connected to the side wall of the handle (503), and second tension springs (505) are fixedly connected to the corresponding side walls of the fixed block (501), one end of the second tension spring (505) away from the fixed block (501) is fixedly connected to a first stop block (506), and another end of the second tension spring (505) away from the fixed block (501) is fixedly connected to a second stop block (508).

3. A level measuring instrument for surveying and mapping according to claim 2, characterized in that: The outer wall of the second connecting frame (4) is slidably connected to a first slider (507), and the end of the first slider (507) corresponds to the end inclined surface of the first stop block (506); the inner wall of the second connecting frame (4) is slidably connected to a second slider (509), and the end of the second slider (509) corresponds to the end inclined surface of the second stop block (508); the outer wall of the second slider (509) is fixedly connected to a third tension spring (510), and the end of the third tension spring (510) away from the second slider (509) is fixedly connected to the side wall of the second connecting frame (4); the outer wall of the first slider (507) is fixedly connected to a fourth tension spring (511), and the end of the fourth tension spring (511) away from the first slider (507) is fixedly connected to the outer wall of the second connecting frame (4).

4. A level measuring instrument for surveying and mapping according to claim 3, characterized in that: The corresponding two side walls of the second connecting frame (4) are both penetrated by second rotating shafts (512) for rotational connection, a horizontal frame (513) is fixedly connected between the two second rotating shafts (512), and a leveling ball (514) is fixedly connected to the bottom center of the horizontal frame (513) via a pull rope.

5. A level measuring instrument for surveying and mapping according to claim 4, characterized in that: The end of the first sliding block (507) corresponds to the outer wall of the second rotating shaft (512), the end of the second sliding block (509) corresponds to the outer wall of the first rotating shaft (3), and the leveling ball (514) extends to the inside of the spherical groove (6) through a pull rope.

6. A level measuring instrument for surveying and mapping according to claim 5, characterized in that: The protection mechanism (7) comprises a clamping rod (701), and a sliding groove (702) is formed through the side wall of the clamping rod (701), the inner wall of the sliding groove (702) is slidably connected to a sliding rod (703), and the outer wall of the sliding rod (703) is fixedly connected to a limiting block (704), one end of the clamping rod (701) is fixedly connected to a fifth tension spring (705), and the end of the fifth tension spring (705) away from the clamping rod (701) is fixedly connected to the inside of the mounting platform (1), the inner wall of the spherical groove (6) is slidably connected to a clamping ring (706), and the bottom of the clamping ring (706) is provided with a clamping groove that is clamped to the end of the clamping rod (701).

7. A level measuring instrument for surveying and mapping according to claim 6, characterized in that: The outer wall of the clamping rod (701) passes through and is slidably connected to the interior of the mounting platform (1); the end of the clamping rod (701) away from the clamping ring (706) is fixedly connected to a reset rod (707); the outer wall of the reset rod (707) passes through and is slidably connected to the interior of the mounting platform (1); a protective plate (708) is rotatably connected to the position of the outer wall of the mounting platform (1) corresponding to the limit block (704) via a torsion spring; and a side wall of the protective plate (708) is provided with a clamping groove that is clamped to the end of the limit block (704).

8. A level measuring instrument for surveying and mapping according to claim 7, characterized in that: A level measuring instrument (8) is fixedly mounted on the inner wall of the horizontal frame (513), and a plurality of brackets (9) are hingedly connected to the bottom of the mounting platform (1).

9. A measuring method for a level measuring instrument for surveying and mapping according to claim 8, characterized in that: The following steps are involved: S1: Installation: open the bracket (9) to expand the contact surface, extend the sleeve to adapt to the terrain, place the device in the measurement area, manually rotate the protective plate (708), press the reset rod (707), slide the clamping rod (701), stretch the fifth tension spring (705) to apply force, slide the sliding rod (703) along the sliding groove (702), slide the limit block (704), and the clamping rod (701) engages with the clamping ring (706). The protective plate (708) is fixed under the installation platform (1), and the installation before measurement is completed; S2: Leveling measurement: by pulling the handle (503), the squeezing block (504) is driven to move, the first tension spring (502) is stretched, the squeezing block (504) moves to make the first stop block (506) and the second stop block (508) slide, and the limit of the first slider (507) and the second slider (509) is released. After the first slider (507) and the second slider (509) slide, the second rotating shaft (512) and the first rotating shaft (3) can rotate freely, the horizontal frame (513) rotates around the second rotating shaft (512) as the axis to provide lateral balance for the level measuring instrument (8), and the second connecting frame (4) rotates around the first rotating shaft (3) as the axis to provide longitudinal balance, thereby completing rapid leveling, and then releasing the handle (503) to achieve locking of the second rotating shaft (512) and the first rotating shaft (3); S3: Fall protection: The leveling ball (514) is suspended in the spherical groove (6) and can roll and hit the clamping ring (706) when the device is tilted. The clamping ring (706) slides and detaches from the clamping rod (701) due to the impact. The fifth tension spring (705) resets the tension to drive the clamping rod (701) to slide. The slide groove (702) slides along the slide rod (703). The limit block (704) slides up and detaches from the protective plate (708). Then the protective plate (708) is no longer restricted and the torsion spring drives it to rotate upward quickly to surround the second connecting frame (4), thereby protecting the level measuring instrument (8).

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