Surveying and mapping device for service area ramp construction lofting

Abstract

The invention provides a surveying and mapping device for service area ramp construction lofting, and relates to the technical field of pier center lofting and surveying and mapping, the surveying and mapping device comprises a surveying and mapping mounting piece, and the surveying and mapping mounting piece is provided with an angle adjusting piece; the angle adjusting piece is used for reflecting laser of the total station; the angle adjusting piece is provided with a proofreading piece; the proofreading piece, the angle adjusting piece and the laser of the total station are coaxial; an angle adjusting piece is mounted on the angle adjusting piece; the calibration piece is matched with the angle swing arm, the adjustment efficiency of a worker during laser surveying and mapping of the total station can be effectively improved, the tripod does not need to be moved and adjusted tediously, and the operation difficulty can be effectively reduced; the surveying and mapping device aims to solve the problems that an existing surveying and mapping device for ramp construction lofting is inconvenient to use a total station eyepiece to guide and adjust a prism through laser, and surveying and mapping point finding adjustment efficiency is low.

Description

Technical Field

[0001] This invention relates to the field of bridge pier center layout and surveying technology, and in particular to a surveying device for layout of service area ramp construction. Background Technology

[0002] In actual service area ramp construction, many sunken service areas require bridge ramps for traffic guidance. Ramp bridges are typically constructed by pouring concrete for the piers on the slope before installing the box girders. During pier construction, the center of the pier is usually laid out at the top of the slope using a total station, requiring laser reflection using a prism. Currently, when using surveying equipment for ramp construction on slopes, workers need to frequently adjust the position of the prism tripod, increasing the slope's variable compared to planar layout. When manually operating the prism to align with the total station, adjustments for left, right, forward, and backward displacement are interfered with by the slope, requiring frequent observation of the bubble level. This makes it inconvenient to use the total station eyepiece for laser-guided prism adjustments, resulting in low efficiency in surveying and point finding. Furthermore, traditional prism surveying is not conducive to calibrating the alignment accuracy of the total station's laser projection point and the eyepiece, and laser offset can easily affect surveying accuracy. Summary of the Invention

[0003] This disclosure relates to a surveying device for setting out construction of service area ramps, which solves the problem that current surveying devices for ramp construction setting out are not convenient for using the total station eyepiece to guide the adjustment of the prism with laser, resulting in low efficiency in surveying and point finding and adjustment.

[0004] In a first aspect, this disclosure provides a surveying device for setting out construction of service area ramps, specifically including a surveying installation component. An angle adjustment component is mounted on the surveying installation component; the angle adjustment component is used to reflect the laser beam of a total station; a calibration component is mounted on the angle adjustment component; the calibration component, the angle adjustment component, and the laser beam of the total station are coaxial; an angle adjustment element is mounted on the angle adjustment component; a laser positioning element is mounted on the angle adjustment component; an eyepiece calibration element is mounted on the calibration component; the surveying installation component includes a surveying installation rod and ground-inserting shafts, the surveying installation rod having a through groove in its middle; two ground-inserting shafts are fixedly mounted at the bottom of the surveying installation rod, each ground-inserting shaft having a conical bottom structure.

[0005] In at least some embodiments, the surveying installation component further includes: a stop sleeve, a fastening bolt, a positioning plate, a swing main rod, and a positioning bolt. A stop sleeve is fitted onto each of the two ground-inserting shafts, and a fastening bolt is threaded onto each of the two stop sleeves. The ends of the two fastening bolts are pressed against the sides of the two ground-inserting shafts. Two positioning plates are fixedly installed at the ends of the surveying installation rod, and each positioning plate has an arc-shaped groove. A swing main rod is rotatably mounted on the two positioning plates. A positioning bolt is threaded onto the swing main rod, and the positioning bolt passes through the positioning plate. The inner side of the positioning bolt is pressed against the positioning plate.

[0006] In at least some embodiments, the angle adjustment component includes: an angle swing arm, an upper swing arm, a prism slider, a rotary cylinder, and a prism body. The angle swing arm is rotatably mounted on a surveying mounting rod. The angle swing arm has an L-shaped structure. An upper swing arm is rotatably mounted on the front end of the angle swing arm, and the upper swing arm is rotatably mounted on a swing main rod. A prism slider is slidably mounted on the angle swing arm, and a rotary cylinder is rotatably sleeved on the prism slider. The rotary cylinder has meshing teeth on its outer side. A prism body is fixedly sleeved on the rotary cylinder. The angle swing arm is used to adjust the surveying angle.

[0007] In at least some embodiments, the calibration component includes: a calibration ring and a vertical rod, wherein the calibration ring is fixedly mounted on the angle swing arm by bolts; the inner side of the calibration ring is provided with a groove; the top of the calibration ring is fixedly mounted with a vertical rod; and the calibration ring and the prism body are concentric.

[0008] In at least some embodiments, the calibration component further includes: lateral tips, with lateral tips fixedly installed on the left and right sides of the calibration ring respectively, and the two lateral tips are used to facilitate alignment with the total station eyepiece.

[0009] In at least some embodiments, the angle adjustment component includes: a prism target, a drive motor, and a drive gear. The prism target is fixedly mounted on the prism slider. The drive motor is fixedly mounted on the prism target, and the output shaft of the drive motor passes through the prism target. The drive gear is fixedly mounted on the output shaft of the drive motor, and the drive gear meshes with meshing teeth on the outer side of the rotary drum.

[0010] In at least some embodiments, the laser positioning component includes: a swing frame, counterweights, and a central laser light. The swing frame is rotatably mounted on the prism slider. Two counterweights are fixedly mounted on the swing frame. A central laser light is fixedly mounted at the bottom of the swing frame, and the central laser light passes through a through slot on the surveying mounting rod.

[0011] In at least some embodiments, the laser positioning component further includes a contour laser light, wherein contour laser lights are fixedly installed at both ends of the swing frame, and the two contour laser lights are symmetrically arranged.

[0012] In at least some embodiments, the eyepiece calibration component includes: an inflatable air bladder and a guide tube, wherein the outer ring of the inflatable air bladder is fixedly sleeved on the inner side of the calibration ring; the guide tube is fixedly installed on the inflatable air bladder and passes through the calibration ring; the inflatable air bladder has a ring structure; and a valve is provided on the guide tube.

[0013] In at least some embodiments, the eyepiece calibration component further includes an inflatable airbag, which is fixedly mounted on the guide tube.

[0014] This invention provides a surveying device for setting out construction of service area ramps, which has the following beneficial effects:

[0015] The present invention employs a structural design that combines a calibration component with an angle swing arm, which can effectively improve the adjustment efficiency of operators when using a total station for laser mapping. It eliminates the need for cumbersome tripod relocation and adjustment, reducing operational difficulty. During the initial rough alignment of the total station's laser line, subsequent fine-tuning can be quickly performed using a prism slider that can move along the laser direction. The structure is simple to operate and is more suitable for slope mapping, reducing slope interference.

[0016] In addition, using laser-guided marking components can quickly mark the center point using laser marking, while using two contour laser lights to mark the contour outside the center point. This avoids the center point being destroyed during subsequent excavation, making it difficult to obtain the center point again later.

[0017] In addition, the use of an inflatable airbag can shrink the size of the internal through-hole, making it easier for staff to calibrate the total station, further eliminating interference from the eyepiece accuracy of the total station, and further ensuring the accuracy of laser layout. This avoids the problem that it is difficult for personnel to know in a timely manner due to factors such as long-term use, which may cause excessive deviation between the center point of the total station's laser and the eyepiece, resulting in a large deviation between the center point observed by the eyepiece and the actual projection position. Attached Figure Description

[0018] To more clearly illustrate the technical solutions of the embodiments of the present invention, the accompanying drawings of the embodiments will be briefly described below.

[0019] The accompanying drawings described below are only related to some embodiments of the invention and are not intended to limit the invention.

[0020] In the attached diagram:

[0021] Figure 1 This invention provides a schematic diagram of the overall structure of a surveying device for setting out construction of service area ramps.

[0022] Figure 2 This invention illustrates the positional relationship between a surveying device for setting out construction of a service area ramp and a total station.

[0023] Figure 3 A schematic diagram of the bottom structure of the surveying and mounting pole of this application is shown;

[0024] Figure 4 This application shows Figure 3 Enlarged view of the structure of region A in the middle;

[0025] Figure 5 A schematic diagram of the angle adjustment component structure of this application is shown;

[0026] Figure 6 This application shows Figure 1 Enlarged view of the structure of region C in the middle;

[0027] Figure 7 A schematic diagram of the angle adjustment component structure of this application is shown;

[0028] Figure 8 A schematic diagram of the installation position of the inflatable airbag in this application is shown;

[0029] Figure 9 A schematic diagram of the laser positioning component structure of this application is shown;

[0030] Figure 10 A schematic diagram of the proofreading component structure of this application is shown.

[0031] List of reference numerals

[0032] 1. Surveying and mapping installation components; 101. Surveying and mapping installation rod; 102. Ground insertion shaft; 103. Stop sleeve; 104. Fastening bolt; 105. Positioning plate; 106. Swinging main rod; 107. Positioning bolt; 2. Angle adjustment components; 201. Angle swing arm; 2011. Upper swing arm; 202. Prism slider; 203. Rotary cylinder; 204. Prism body; 3. Calibration components; 301. Calibration ring; 302. Vertical rod; 303. Lateral tip; 4. Angle adjustment components; 401. Prism target; 402. Drive motor; 403. Drive gear; 5. Laser positioning components; 501. Swing frame; 502. Counterweight; 503. Center laser light; 504. Contour laser light; 6. Eyepiece calibration components; 601. Inflatable airbag; 602. Conductor tube; 603. Inflatable airbag. Detailed Implementation

[0033] To make the objectives, technical solutions, and advantages of the embodiments of the present invention clearer, the technical solutions of the embodiments of the present invention will be clearly and completely described below with reference to the accompanying drawings. Obviously, the described embodiments are only some, not all, of the embodiments of the present invention. Based on the described embodiments of the present invention, all other embodiments obtained by those skilled in the art without creative effort are within the scope of protection of the present invention.

[0034] Example 1: Please refer to Figures 1 to 10 :

[0035] This invention proposes a surveying device for setting out construction of service area ramps, including a surveying installation component 1, on which an angle adjustment component 2 is installed; the angle adjustment component 2 is used to reflect the laser of a total station; a calibration component 3 is installed on the angle adjustment component 2; the calibration component 3, the angle adjustment component 2, and the laser of the total station are coaxial; an angle adjustment component 4 is installed on the angle adjustment component 2; a laser positioning component 5 is installed on the angle adjustment component 2; an eyepiece calibration component 6 is installed on the calibration component 3; the surveying installation component 1 includes: a surveying installation rod 101 and ground-inserting shafts 102, the surveying installation rod 101 has a through groove in the middle; two ground-inserting shafts 102 are fixedly installed at the bottom of the surveying installation rod 101, and the bottoms of the two ground-inserting shafts 102 are conical structures.

[0036] In this embodiment, the surveying mounting component 1 further includes: a stop sleeve 103, fastening bolts 104, a positioning plate 105, a swing main rod 106, and positioning bolts 107. Stop sleeves 103 are respectively fitted onto the two ground-inserting shafts 102, and fastening bolts 104 are threaded onto the two stop sleeves 103. The ends of the two fastening bolts 104 are pressed against the sides of the two ground-inserting shafts 102. Two positioning plates 105 are fixedly installed at the end of the surveying mounting rod 101, and each positioning plate 105 has an arc-shaped groove. The swing main rod 106 is rotatably mounted on the two positioning plates 105. Positioning bolts 107 are threaded onto the swing main rod 106, and the positioning bolts 107 pass through the positioning plates 105. 05; The inner side of the positioning bolt 107 is pressed and adhered to the positioning plate 105; The angle adjustment component 2 includes: an angle swing arm 201, an upper swing arm 2011, a prism slider 202, a rotary cylinder 203, and a prism body 204. The angle swing arm 201 is rotatably mounted on the surveying mounting rod 101; the angle swing arm 201 has an L-shaped structure; the upper swing arm 2011 is rotatably mounted at the front end of the angle swing arm 201, and the upper swing arm 2011 is rotatably mounted on the swing main rod 106; the prism slider 202 is slidably mounted on the angle swing arm 201, and the rotary cylinder 203 is rotatably sleeved on the prism slider 202; the outer side of the rotary cylinder 203 is provided with meshing teeth; the prism body 204 is fixedly sleeved on the rotary cylinder 203; Angle swing arm 201 is used to adjust the surveying angle; calibration component 3 includes: calibration ring 301 and vertical rod 302. Calibration ring 301 is fixedly installed on angle swing arm 201 by bolts; the inner side of calibration ring 301 has a groove; the vertical rod 302 is fixedly installed on the top of calibration ring 301; calibration ring 301 and prism body 204 are concentric; calibration component 3 also includes: lateral tips 303. Lateral tips 303 are fixedly installed on the left and right sides of calibration ring 301, and the two lateral tips 303 are used to facilitate alignment with the total station eyepiece; by using calibration component 3 in conjunction with angle swing arm 201, the adjustment efficiency of the staff when performing laser surveying with a total station can be effectively improved. This structure does not require cumbersome moving and adjusting. The tripod effectively reduces the difficulty of operation. During the initial coarse adjustment and alignment of the total station's laser line, the prism slider 202, which can move along the laser direction, can be used to quickly carry out subsequent fine adjustments. This structure is easy to operate and is more suitable for slope surveying work. It can avoid the difficulty of finding points caused by slope topographic variables, as well as the prism displacement problem caused by neglecting to pay attention to the horizontal bubble. When it is necessary to lay out the center of the bridge pier with the total station, the total station can be started at the top of the slope. After adjusting the laser projection direction and angle according to the predetermined parameters, the laser projection direction can be observed through the eyepiece of the total station. At this time, the staff responsible for finding the points can hold this structure and make coarse adjustments first, and obtain the approximate position of the center point of the bridge pier through the total station.Then, align the vertical rod 302 vertically with the vertical line in the eyepiece to define the vertical position. Next, insert the two ground-inserting shafts 102 into the ground within the approximate area. Then, manually slide the prism slider 202 to align with the center of the total station's eyepiece. At this point, the calibration ring 301 can be used to ensure that the center point of the total station's eyepiece is aligned with the center of the prism body 204 through the calibration ring 301. This achieves a straight line between the total station, the calibration ring 301, and the prism body 204. During adjustment, the angle swing arm 201 can be rotated to adjust the angle. Tightening the positioning bolt 107 will fix the swing main rod 106, ensuring the accuracy of the angle swing arm 201's angle. The insertion depth of the ground-inserting shafts 102 can be manually controlled according to the actual alignment situation, ensuring the above three points remain aligned. This fully utilizes the total station's eyepiece for rapid point finding.

[0037] In this embodiment, the angle adjustment component 4 includes: a prism target 401, a drive motor 402, and a drive gear 403. The prism target 401 is fixedly mounted on the prism slider 202. The drive motor 402 is fixedly mounted on the prism target 401, and the output shaft of the drive motor 402 passes through the prism target 401. The drive gear 403 is fixedly mounted on the output shaft of the drive motor 402, and the drive gear 403 meshes with meshing teeth on the outer side of the rotary cylinder 203. The laser positioning component 5 includes: a swing frame 501, counterweights 502, and a central laser lamp 503. The swing frame 501 is rotatably mounted on the prism slider 202. Two counterweights 502 are fixedly mounted on the swing frame 501. A central laser light 503 is fixedly installed at the bottom of the 01, and the central laser light 503 passes through the through groove on the surveying and mapping mounting rod 101; the laser positioning component 5 also includes: a contour laser light 504, and contour laser lights 504 are fixedly installed at both ends of the swing frame 501, and the two contour laser lights 504 are symmetrically arranged. The laser positioning component 5 can quickly mark the center point by laser marking, and at the same time, the two contour laser lights 504 are used to mark the contour outside the center point, so as to avoid the problem that the center point is destroyed when excavating at the center point later, and it is difficult to obtain the center point again. The midpoint of the line connecting the projection points of the two contour laser lights 504 is the center point projected by the central laser light 503.

[0038] In Example 2, based on Example 1, the eyepiece calibration component 6 includes: an inflatable air bladder 601 and a connecting tube 602. The outer ring of the inflatable air bladder 601 is fixedly sleeved inside the calibration ring 301. The connecting tube 602 is fixedly installed on the inflatable air bladder 601 and passes through the calibration ring 301. The inflatable air bladder 601 has a ring structure. A valve is provided on the connecting tube 602. The eyepiece calibration component 6 also includes: an inflatable air bladder 603, which is fixedly installed on the connecting tube 602. The use of an inflatable air bladder 601 allows for the shrinking of the internal through-hole size, facilitating the calibration of the total station by staff and further eliminating the limitations of the total station. Eyepiece accuracy interference can further ensure the accuracy of laser layout and avoid excessive deviation between the laser and the centerline point of the total station due to factors such as long-term use. This would cause a large deviation between the center point observed by the eyepiece and the actual projection position, making it difficult for humans to detect the impact on accuracy in a timely manner. This structure is simple and direct to calibrate, without the need for tedious factory testing. If the laser and the center point of the total station eyepiece deviate significantly, when the expansion bladder 601 expands, the laser and the calibration ring 301 will be off-center and projected onto the expansion bladder 601, which means it will be blocked by the expansion bladder 601. At this time, the distance measurement parameters of the total station will fluctuate greatly.

[0039] The working principle of this embodiment is as follows: First, the total station can be started at the top of the slope. After adjusting the laser projection direction and angle according to the predetermined parameters, the laser projection direction can be observed through the eyepiece of the total station. At this time, the staff responsible for finding the point holds this structure and performs a rough adjustment to roughly obtain the position of the center point of the pier through the total station. Then, the vertical rod 302 is vertically aligned with the vertical line in the eyepiece to define the vertical position. Then, the two ground-inserting shafts 102 are inserted into the ground in the approximate area. Then, the prism slider 202 is manually slid to align with the center of the total station's eyepiece. At this time, the calibration ring 301 can be used to ensure that the center point of the total station's eyepiece is aligned with the center of the prism body 204 through the calibration ring 301, so that the total station, calibration ring 301 and prism body 204 are in a straight line. During the adjustment process, the angle swing arm 201 can be rotated to adjust the angle. Tightening the positioning bolt 107 can fix the swing main rod 106. To ensure the accuracy of the angle of the swing arm 201, the insertion depth of the ground shaft 102 can be manually controlled according to the actual alignment situation, as long as the above three points are aligned. Tightening the fastening bolt 104 will position the height of the stop sleeve 103, preventing the ground shaft 102 from sinking excessively and keeping the angle swing arm 201 completely parallel to the laser of the total station. Then, the prism slider 202 can be manually controlled to move back and forth on the angle swing arm 201. At this time, no matter whether the prism slider 202 moves forward or backward, the laser will be aligned with the prism body 204, and the reading will be displayed in real time until the sliding adjustment is to the predetermined distance parameter of the total station. The position of the prism body 204 is the center position of the pier. Under the counterweight of the counterweight block 502, the swing frame 501 remains vertical in real time. At this time, the laser marking points projected by the contour laser light 504 and the center laser light 503 can be manually marked with ground nails.

[0040] This structure utilizes a prism target 401 to facilitate eyepiece observation and centering; the drive motor 402 drives the drive gear 403 to rotate, meshing with the drive rotary cylinder 203, which in turn drives the prism body 204 to rotate. When the total station observation distance is far, although the eyepiece is visually aligned perfectly with the prism body 204, there is inevitably some deviation in reality. When the prism body 204 rotates, it switches the position of the reflected laser, allowing staff to collect data multiple times and observe the deviation. The use of a rotatable prism body 204 avoids data interference caused by dust, scratches, or other factors affecting laser reflection, facilitates rotation and adjustment, allows for the measurement of multiple data points, and increases the accuracy of pier center point layout and surveying.

[0041] Before surveying, the concentricity accuracy of the total station's eyepiece and laser point can be calibrated. When the total station, calibration ring 301, and prism body 204 are aligned, the total station's eyepiece should be aligned with the center of calibration ring 301. Under normal accuracy, the total station's laser should also pass through the center of calibration ring 301. At this time, press the inflation bladder 603 to inflate the bladder 601, and then tighten the valve on the guide tube 602. Due to the expansion, the inner side of the inflation bladder 601 will form a constriction hole, reducing the diameter of the central hole, but the laser can still pass through the center. If the laser and the center point of the total station's eyepiece deviate significantly, when the inflation bladder 601 expands, because the laser and calibration ring 301 are off-center, the laser will be projected onto the inflation bladder 601, meaning it will be blocked by the inflation bladder 601. At this time, the total station's distance measurement parameters will fluctuate significantly, indicating that the center point of the total station's eyepiece deviates significantly from the actual laser projection center, requiring timely correction.

[0042] The following points should be noted in this article:

[0043] 1. The accompanying drawings of the embodiments disclosed herein only relate to the structures involved in the embodiments disclosed herein; other structures can be referred to in general design.

[0044] 2. Where there is no conflict, the embodiments of this disclosure and the features in the embodiments can be combined with each other to obtain new embodiments.

[0045] The above are merely specific embodiments of this disclosure, but the scope of protection of this disclosure is not limited thereto. Any variations or substitutions that can be easily conceived by those skilled in the art within the scope of the technology disclosed in this disclosure should be included within the scope of protection of this disclosure. Therefore, the scope of protection of this disclosure should be determined by the scope of the claims.

Claims

1. A surveying device for setting out construction of service area ramps, comprising a surveying mounting component (1), wherein an angle adjustment component (2) is mounted on the surveying mounting component (1); characterized in that: The angle adjustment component (2) is used to reflect the laser of the total station; a calibration component (3) is installed on the angle adjustment component (2); the calibration component (3), the angle adjustment component (2), and the laser of the total station are coaxial; An angle adjustment component (4) is installed on the angle adjustment component (2); a laser positioning component (5) is installed on the angle adjustment component (2); and an eyepiece calibration component (6) is installed on the calibration component (3). The surveying installation component (1) includes: a surveying installation rod (101), a ground-inserting shaft (102), and a swing main rod (106). The surveying installation rod (101) has a through groove in the middle. Two ground-inserting shafts (102) are fixedly installed at the bottom of the surveying installation rod (101), and the bottoms of the two ground-inserting shafts (102) are conical structures. The angle adjustment component (2) includes: an angle swing arm (201), an upper swing arm (2011), a prism slider (202), a rotary cylinder (203), and a prism body (204). The angle swing arm (201) is rotatably mounted on the surveying mounting rod (101). The angle swing arm (201) has an L-shaped structure. The upper swing arm (2011) is rotatably mounted on the front end of the angle swing arm (201), and the upper swing arm (2011) is rotatably mounted on the swing main rod (106). The prism slider (202) is slidably mounted on the angle swing arm (201), and the rotary cylinder (203) is rotatably sleeved on the prism slider (202). The rotary cylinder (203) has meshing teeth on its outer side. The prism body (204) is fixedly sleeved on the rotary cylinder (203). The angle swing arm (201) is used to adjust the surveying angle.

2. The surveying device for setting out construction of service area ramps according to claim 1, characterized in that, The surveying installation component (1) further includes: a stop sleeve (103), a fastening bolt (104), a positioning plate (105), and a positioning bolt (107). The two ground-inserting shafts (102) are respectively fitted with stop sleeves (103), and the two stop sleeves (103) are respectively threaded with fastening bolts (104). The ends of the two fastening bolts (104) are respectively pressed and adhered to the sides of the two ground-inserting shafts (102). The end of the surveying installation rod (101) is fixedly installed with two positioning plates (105), and the two positioning plates (105) are respectively provided with arc-shaped grooves. The two positioning plates (105) are rotatably installed with swing main rods (106). The swing main rods (106) are threaded and connected with positioning bolts (107), and the positioning bolts (107) pass through the positioning plates (105). The inner side of the positioning bolts (107) is pressed and adhered to the positioning plates (105).

3. The surveying device for setting out construction of service area ramps according to claim 1, characterized in that, The calibration component (3) includes: a calibration ring (301) and a vertical rod (302). The calibration ring (301) is fixedly installed on the angle swing arm (201) by bolts. The calibration ring (301) has a groove on its inner side. The vertical rod (302) is fixedly installed on the top of the calibration ring (301). The calibration ring (301) and the prism body (204) are concentric.

4. The surveying device for setting out construction of service area ramps according to claim 3, characterized in that, The calibration component (3) further includes: a lateral tip (303), on the left and right sides of the calibration ring (301) respectively, and the two lateral tips (303) are used to facilitate alignment with the total station eyepiece.

5. The surveying device for setting out construction of service area ramps according to claim 1, characterized in that, The angle adjustment component (4) includes: a prism target (401), a drive motor (402), and a drive gear (403). The prism target (401) is fixedly mounted on the prism slider (202). The drive motor (402) is fixedly mounted on the prism target (401), and the output shaft of the drive motor (402) passes through the prism target (401). The drive gear (403) is fixedly mounted on the output shaft of the drive motor (402), and the drive gear (403) meshes with the outer side of the rotary drum (203) and has meshing teeth.

6. The surveying device for setting out construction of service area ramps according to claim 1, characterized in that, The laser positioning component (5) includes: a swing frame (501), a counterweight (502) and a central laser lamp (503). The swing frame (501) is rotatably mounted on the prism slider (202). Two counterweights (502) are fixedly mounted on the swing frame (501). A central laser lamp (503) is fixedly mounted at the bottom of the swing frame (501), and the central laser lamp (503) passes through the through slot on the surveying mounting rod (101).

7. A surveying device for setting out construction of service area ramps according to claim 6, characterized in that, The laser positioning component (5) further includes a contour laser lamp (504), and contour laser lamps (504) are fixedly installed at both ends of the swing frame (501), and the two contour laser lamps (504) are symmetrically arranged.

8. A surveying device for setting out construction of service area ramps according to claim 3, characterized in that, The eyepiece calibration component (6) includes: an inflatable air bladder (601) and a guide tube (602). The outer ring of the inflatable air bladder (601) is fixedly sleeved on the inner side of the calibration ring (301). The guide tube (602) is fixedly installed on the inflatable air bladder (601) and passes through the calibration ring (301). The inflatable air bladder (601) has a ring structure. The guide tube (602) is provided with a valve.

9. A surveying device for setting out construction of service area ramps according to claim 8, characterized in that, The eyepiece calibration component (6) further includes an inflatable airbag (603), which is fixedly installed on the guide tube (602).

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