Portable surveying and mapping device for exploration engineering
Through the linkage of automatic response locking and shielding mechanism and sound and light alarm, the lens is protected from direct strong light in real time, solving the problems of lens damage and personnel eye injury, and achieving dual safety protection of equipment and personnel.
Patent Information
- Application Number
- CN202510977769.7
- Authority / Receiving Office
- CN · China
- Patent Type
- Applications(China)
- Current Assignee / Owner
- Filing Date
- 2025-07-16
- Publication Date
- 2025-09-19
- Estimated Expiration
- Not applicable · inactive patent
AI Technical Summary
When the lens of existing portable exploration engineering surveying and mapping devices is exposed to direct sunlight, it may cause damage to the photosensitive elements inside the lens and damage to the workers' eyes, and there is a lack of effective protection measures.
It adopts an automatic response locking mechanism and a follow-up shielding mechanism, and monitors the lens deflection angle in real time through a detection device. When the danger threshold is reached, the electric telescopic rod locks the lens, and the linkage component drives the shielding component to block the lens. Combined with the sound and light alarm, it prompts the operator to achieve double protection.
It effectively prevents lens damage and eye injuries caused by strong light, reduces equipment maintenance costs and personnel medical risks, and significantly improves safety and lens service life.
Smart Images

Figure CN120668093A_ABST
Abstract
Description
Technical Field
[0001] The present invention provides a portable exploration engineering surveying and mapping device, and particularly relates to the technical field of engineering surveying and mapping. Background Art
[0002] Exploration engineering surveying and mapping equipment is specialized equipment used in fields such as geological prospecting, mineral resource development, energy exploration, and engineering construction to measure topography and geomorphology, perform spatial positioning, map geological structures, and collect data. Specifically, engineering surveying and mapping equipment, also known as total stations, is primarily used to measure azimuth, elevation, and distance in geographic space and is widely used in civil engineering, construction, and exploration projects.
[0003] Authorization publication number CN117109546B discloses a portable geographic survey and mapping device. While this device can reduce surveying errors, it neglects emergency lens protection measures. Some operators, due to improper operation or accidental circumstances, may point the lens toward sunlight, accidentally exposing it to direct sunlight. Because the objective lens and eyepiece of a total station are precision optical components, when exposed to direct sunlight, the lens will focus light like a convex lens, concentrating the energy on the instrument's internal photosensitive elements (such as CCD / CMOS) or optical system. This focusing effect can cause a sharp increase in local temperature (up to hundreds of degrees), which can cause optical coatings to age and reduce imaging accuracy at best, or directly burn the photosensitive chip or lens, causing permanent damage to the instrument.
[0004] Therefore, the present invention proposes a portable surveying and mapping device for exploration engineering to make up for the deficiencies of the prior art. Summary of the Invention
[0005] In view of the defects of the prior art, the present invention provides a portable exploration engineering surveying and mapping device, which can effectively solve the relevant technical problems raised by the background technology.
[0006] To achieve the above objectives, the present invention is implemented through the following technical solutions: The present invention discloses a portable surveying and mapping device for exploration engineering, comprising a surveying instrument body, a rotating base provided on the surveying instrument body, the rotating base being rotatably connected to the surveying instrument body via shafts symmetrically provided on both sides thereof, an observation lens being fixedly provided in the middle of the rotating base, and a portable handle being fixedly provided on the top of the surveying instrument body; Also included is an automatic response locking mechanism provided on the surveying instrument body, which corresponds to the position of the shaft body; It includes a circular body fixedly connected to the outer peripheral surface of the shaft, with a plurality of equidistantly distributed locking teeth evenly arranged on the outer ring surface of the circular body, a reference plate fixedly arranged on the side of the circular body facing the objective end of the observation lens, a mounting plate symmetrically fixedly arranged on the side close to each other on the top of the surveying instrument body, a detection device installed on one side of the bottom of the mounting plate, an electric telescopic rod fixedly installed in the middle of the bottom surface of the mounting plate, the end of the telescopic shaft of the electric telescopic rod fixedly connected to an arc plate, and a plurality of matching teeth evenly arranged on the arc surface of the bottom surface of the arc plate, each matching tooth and each locking tooth are staggered, and each matching tooth engages with each locking tooth when it moves down to the final position; A response device is provided on the top of the mounting plate; The detection device emits laser to detect the upward deflection angle of the reference plate in real time. When the deflection angle exceeds the set threshold, the controller drives the electric telescopic rod to move the curved plate downward and activates the response device. The response device includes a controller and an alarm unit, which are used to receive signals from the detection device and perform linkage control.
[0007] Preferably, the laser emitting end at the bottom of the detection device is vertically aligned with the reference plate, and the coverage range of the laser forms a fan-shaped detection area, the angle range of the fan-shaped detection area covers the maximum working deflection angle of the reference plate.
[0008] Preferably, the detection device and the electrically controlled telescopic rod are powered by a storage module on the surveying instrument body.
[0009] Preferably, a movable gap is provided between the arc-shaped plate and the rotating seat, and the movable gap is one centimeter.
[0010] Preferably, the response device is configured as an audible and visual alarm, which is activated when the detection device detects that the deflection angle exceeds a set threshold.
[0011] Preferably, the follow-up shielding mechanism is provided on the surveying instrument body and corresponds to the position of the automatic response locking mechanism. The follow-up shielding mechanism includes a shielding component and a linkage component. The linkage component cooperates with the arc plate in the automatic response locking mechanism to drive the shielding component to move and shield the objective lens end. The shielding assembly includes: two rectangular rails symmetrically fixedly connected to the outside of the top of the surveying instrument body, each rectangular rail is slidably sleeved with a sleeve block, an inclined rod is fixedly provided on the side of the sleeve block away from the surveying instrument body, and a semicircular plate is fixedly provided on the end of the inclined rod away from the sleeve block. There are two semicircular plates in total, which are tilted and located obliquely above the objective end of the observation lens. Both are opaque, and form a complete circular plate structure when the two semicircular plates are closed, which is used to completely shield the objective end of the observation lens.
[0012] Preferably, the semicircular plate is made of acrylic material, and the top surface of the semicircular plate is evenly coated with a black light-shielding layer.
[0013] Preferably, the linkage assembly includes two transverse plates symmetrically fixedly mounted on the outside of the top of the surveying instrument body, the two transverse plates are located directly below the two rectangular rails, and the two transverse plates are rotatably connected to two synchronous wheels on one side away from the surveying instrument body, a synchronous belt is connected between the two synchronous wheels, a bottom block is fixedly provided on one side of the top of the synchronous belt, the top of the bottom block is fixedly connected to the bottom of the sleeve block, a power shaft is fixedly connected to the axis of the synchronous wheel on the side away from the bottom block, a driving gear is fixedly provided on the end of the power shaft away from the synchronous wheel, and a linkage rack is fixedly connected to the outer wall of one side of the arc-shaped plate; When the arc plate moves downward, the linkage rack meshes with the driving gear and drives the synchronous belt to move.
[0014] Preferably, after the arc-shaped plate moves downward to the final position, the two semicircular plates are completely closed, and the linkage rack is in a fully engaged state.
[0015] Compared with the prior art, the technical solution provided by the present invention has the following beneficial effects: This portable exploration engineering surveying and mapping device uses an automatically responsive locking mechanism. When the detection device detects that the deflection angle of the reference plate has reached a preset danger threshold, the electrically controlled telescopic rod tightly engages with the locking teeth, quickly completing the locking action. This prevents the lens from accidentally turning toward the sun and being directly exposed to strong light, preventing permanent damage to the photosensitive elements inside the lens and aging of the coating due to strong light. It also prevents the risk of eye damage caused by workers subconsciously looking through the eyepiece when the lens is turned toward the sun, resulting in direct high-intensity light exposure. This provides dual physical protection for the lens and the personnel's eyes. The response device is equipped with an audible and visual alarm that will immediately emit a beeping sound and a high-frequency flashing red light when the lens angle becomes abnormal. During outdoor surveying and mapping, the dual audible and visual prompts can quickly attract the attention of workers with their strong penetration and visual impact, allowing them to immediately detect the dangerous trend of the lens turning towards the sun. Compared with a single prompt method, this alarm method can improve the reaction speed of workers, avoid damage to the lens due to continued exposure to strong light due to failure to detect abnormalities in time, or avoid eye damage caused by workers inadvertently looking at the lens, effectively reducing equipment maintenance costs and personnel medical risks; The locking and prompting functions are linked to form a "monitoring-warning-protection" structure. When the lens is detected to be accidentally rotated to a dangerous angle, an audible and visual alarm alerts personnel. At the same time, the locking mechanism quickly secures the lens to prevent direct exposure to strong light, effectively reducing the risk of lens damage and eye injury, significantly improving equipment and personnel safety. The follow-up shielding mechanism and the automatic response locking mechanism work together to form a dual protection effect of "mechanical locking + physical shielding". The locking mechanism prevents the lens from accidentally turning towards the sun, while the shielding mechanism quickly shields the objective end with a semicircular plate when the lens is likely to be directly exposed to strong light. Compared with a single locking protection, it can further reduce the risk of thermal damage to the lens caused by strong light, effectively protect the delicate optical components inside the lens, and extend the lens life. The rapid closing of the semicircular plate can block the sun the moment the lens is about to be aimed at the sun, preventing workers from being directly exposed to strong light when observing through the eyepiece due to failure to notice the lens turning in time. Combined with the early warning prompts of the sound and light alarm, the double protection reduces the risk of eye damage and provides active and reliable safety protection for surveying and mapping personnel. BRIEF DESCRIPTION OF THE DRAWINGS
[0016] Figure 1 This is a main perspective structural diagram of the present invention; Figure 2 This is a three-dimensional structural diagram of the present invention from another perspective; Figure 3 It is a partial three-dimensional structural diagram of the relevant components of the rotating seat in the cross-section state of the present invention; Figure 4 It is a partial three-dimensional structural diagram of the relevant components of the torus in the present invention; Figure 5 It is a side view structural diagram of the relevant components of the annular body in the present invention; Figure 6 It is a partial three-dimensional structural diagram of the relevant components of the rectangular rail in the present invention; Figure 7 For the present invention Figure 6 A partial enlarged three-dimensional structure diagram at point A in the middle; Figure 8 It is a partial three-dimensional structural diagram of the relevant components of the follow-up shielding mechanism in the present invention; Figure 9 It is a three-dimensional schematic diagram of the automatic response locking mechanism and the follow-up shielding mechanism of the present invention in use.
[0017] The numbers in the figure represent: 1. Surveying instrument body; 11. Rotating base; 111. Axis; 12. Observation lens; 13. Carrying handle; Automatic response locking mechanism: 21, annular body; 22, locking teeth; 23, reference plate; 24, mounting plate; 25, detection device; 26, electrically controlled telescopic rod; 27, curved plate; 28, mating teeth; 29, response device; Follow-up shielding mechanism: Shielding components: 31, rectangular rail; 32, sleeve block; 321, bottom block; 33, inclined rod; 34, semicircular plate; Linkage components: 35, horizontal plate; 36, synchronous wheel; 37, synchronous belt; 38, power shaft; 39, driving gear; 310, linkage rack. DETAILED DESCRIPTION
[0018] The present invention will be further described below with reference to the embodiments.
[0019] Example 1: like Figures 1 to 5 As shown, a portable surveying and mapping device for exploration engineering includes a surveying instrument body 1. A rotating base 11 is provided on the surveying instrument body 1. The rotating base 11 is rotatably connected to the surveying instrument body 1 through shafts 111 symmetrically provided on both sides thereof. An observation lens 12 is fixedly provided in the middle of the rotating base 11. The two ends of the observation lens 12 are an eyepiece end and an objective lens end respectively. The surveying instrument body 1 is configured as a total station and has mature measurement and mapping functions. The rotating base 11, shaft 111, observation lens 12, and portable handle 13 provided thereon are all existing mature technologies. A portable handle 13 is fixedly provided on the top of the surveying instrument body 1, which allows personnel to carry the device by hand, thereby achieving a portable effect. It also includes an automatic response locking mechanism provided on the surveying instrument body 1, which corresponds to the position of the shaft 111; It comprises a circular ring 21 fixedly connected to the outer circumference of the shaft 111. The outer surface of the ring 21 is uniformly provided with a number of equally spaced locking teeth 22. A reference plate 23 is fixedly mounted on the side of the ring 21 facing the objective end of the observation lens 12. Initially, the reference plate 23 is horizontal. Mounting plates 24 are symmetrically fixed to the top, adjacent to each other, of the surveying instrument body 1. A detection device 25 is mounted on one side of the bottom of the mounting plate 24. An electrically controlled telescopic rod 26 is fixedly mounted in the middle of the bottom surface of the mounting plate 24. Both the detection device 25 and the electrically controlled telescopic rod 26 are powered by a battery module within the surveying instrument body 1. Specifically, a battery is installed within the surveying instrument body 1, which powers the entire surveying and mapping device, as well as the detection device 25 and the electrically controlled telescopic rod 26. The end of the telescopic shaft of the electrically controlled telescopic rod 26 is fixedly connected to a curved plate 27. A one-centimeter clearance is provided between the curved plate 27 and the rotating base 11 to ensure that the curved plate 27 does not interfere with the rotation of the rotating base 11 during its upward and downward movement. A number of mating teeth 28 are evenly distributed on the curved surface of the bottom of the curved plate 27. Each mating tooth 28 is offset from each locking tooth 22, and each mating tooth 28 engages with each locking tooth 22 when it moves downward to its final position. A response device 29 is provided on the top of the mounting plate 24. The response device 29 is configured as an audible and visual alarm. The audible and visual alarm is activated when the detection device 25 detects that the deflection angle exceeds a set threshold. The deflection angle is limited to: 40°-45°.
[0020] The detection device 25 emits laser to detect the upward deflection angle of the reference plate 23 in real time. When the deflection angle exceeds a set threshold, the controller drives the electrically controlled telescopic rod 26 to move the arc plate 27 downward and activates the response device 29.
[0021] Furthermore, the laser emitting end at the bottom of the detection device 25 is vertically aligned with the reference plate 23, and the coverage range of the laser forms a fan-shaped detection area, which covers the rotation range of the reference plate 23 to ensure that the angle change is detected in real time and accurately.
[0022] In Use: To use the surveying device, a worker carries it to the target location using the portable handle 13 and places it securely on the measurement reference point. Then, according to the surveying requirements, the rotating base 11 is rotated and adjusted, driving the observation lens 12 to adjust the observation angle. During this process, the reference plate 23 rotates synchronously with the shaft 111 and the annular body 21.
[0023] When observation lens 12 is adjusted to the desired angle, if external force or improper operation causes the rotating base 11 to accidentally rotate, causing the observation lens 12 to rotate unexpectedly, the deflection angle of reference plate 23 will change. Detection device 25 continuously emits laser light to monitor the angle of reference plate 23. Once it detects that the deflection angle exceeds a set threshold, the controller immediately activates the electrically controlled telescopic rod 26, extending its telescopic shaft and driving curved plate 27 downward. This allows the mating teeth 28 to tightly engage the locking teeth 22, thereby locking the rotating base 11 and preventing further rotation.
[0024] At the same time, response device 29 activates, sounding an audible and visual alarm to alert the operator of an abnormal change in the device's angle. Upon receiving the alarm, the operator readjusts swivel base 11 to the correct position. The controller then shortens the electrically controlled telescopic rod 26, shifting the curved plate 27 upward and disengaging the engaging teeth 28 from the locking teeth 22. Swivel base 11 resumes its free rotation, allowing the operator to continue with subsequent surveying and mapping operations.
[0025] Example 2: like Figure 1 、 Figures 6 to 9 As shown, the portable surveying and mapping device for exploration engineering further includes a follow-up shielding mechanism provided on the surveying instrument body 1, which corresponds to the position of the automatic response locking mechanism. The follow-up shielding mechanism includes a shielding component and a linkage component. The linkage component cooperates with the arc plate 27 in the automatic response locking mechanism to drive the shielding component to move and shield the objective lens end. The shielding assembly includes two rectangular rails 31 symmetrically fixedly connected to the top outer side of the surveying instrument body 1. A sleeve block 32 is slidably mounted on each rectangular rail 31. An inclined rod 33 is fixedly mounted on the side of the sleeve block 32 away from the surveying instrument body 1. A semicircular plate 34 is fixedly mounted on the end of the inclined rod 33 away from the sleeve block 32. Two semicircular plates 34 are provided, and the two semicircular plates 34 are tilted and positioned diagonally above the objective end of the observation lens 12. It is worth noting that the position of the two semicircular plates 34 does not obstruct the normal surveying and mapping of the observation lens 12. Both are opaque, and when closed, the two semicircular plates 34 form a complete circular plate structure that completely blocks the objective end of the observation lens 12.
[0026] The semicircular plate 34 is made of acrylic, which is easy to process and lightweight. The top surface of the semicircular plate 34 is evenly coated with a black light-shielding layer. Specifically, the black light-shielding layer is preferably a polyurethane black matte material, which not only easily adheres to the surface of the semicircular plate 34 but also achieves a 99% light-shielding rate. Other light-shielding materials, such as epoxy-modified acrylic resin black coating, may also be used. The linkage assembly includes two transverse plates 35 symmetrically fixedly mounted on the outer side of the top of the surveying instrument body 1. The two transverse plates 35 are located directly below the two rectangular rails 31, and the two transverse plates 35 are rotatably connected to two synchronous wheels 36 on the side away from the surveying instrument body 1. A synchronous belt 37 is connected between the two synchronous wheels 36. A bottom block 321 is fixedly provided on one side of the top of the synchronous belt 37. The top of the bottom block 321 is fixedly connected to the bottom of the sleeve block 32. A power shaft 38 is fixedly connected to the axis of the synchronous wheel 36 on the side away from the bottom block 321. A driving gear 39 is fixedly provided on the end of the power shaft 38 away from the synchronous wheel 36. A linkage rack 310 is fixedly connected to the outer wall of one side of the arc plate 27. When the arc plate 27 moves downward, the linkage rack 310 meshes with the drive gear 39 and drives the synchronous belt 37 to move. After the arc plate 27 moves downward to the final position, the two semicircular plates 34 are completely closed. At this time, the linkage rack 310 and the drive gear 39 are in a fully meshed state.
[0027] During use: As the curved plate 27 moves downward, the linkage rack 310 on one side of its outer wall engages with the drive gear 39, driving the power shaft 38 to rotate. This rotation of the power shaft 38 drives the synchronous wheel 36, which in turn drives the bottom block 321 via the timing belt 37. The sleeve block 32, fixedly connected to the bottom block 321, slides along the rectangular rail 31, pushing the inclined rod 33 to move the semicircular plate 34. As the curved plate 27 moves downward to its final position, the two semicircular plates 34, driven by the linkage assembly, completely close together, forming a complete circular plate structure, completely shielding the objective end of the observation lens 12 from direct sunlight.
[0028] When the staff readjusts the lens angle, the electrically controlled telescopic rod 26 drives the arc plate 27 to move up and unlock, the linkage rack 310 engages with the drive gear 39 in the opposite direction, and the synchronous belt 37 drives the semicircular plate 34 to separate and reset, restoring the normal surveying and mapping field of view of the observation lens 12.
[0029] The above embodiments are only used to illustrate the technical solutions of the present invention, rather than to limit the same. Although the present invention has been described in detail with reference to the aforementioned embodiments, those skilled in the art should understand that they can still modify the technical solutions described in the aforementioned embodiments, or make equivalent replacements for some of the technical features therein. However, these modifications or replacements will not cause the essence of the corresponding technical solutions to deviate from the spirit and scope of the technical solutions of the various embodiments of the present invention.
Claims
1. A portable surveying and mapping device for exploration engineering, comprising a surveying instrument body (1), a rotating seat (11) provided on the surveying instrument body (1), the rotating seat (11) being rotatably connected to the surveying instrument body (1) via shafts (111) symmetrically provided on both sides thereof, an observation lens (12) being fixedly provided in the middle of the rotating seat (11), characterized in that: A portable handle (13) is fixedly provided on the top of the surveying instrument body (1); It also includes an automatic response locking mechanism provided on the surveying instrument body (1), which corresponds to the position of the shaft body (111); It comprises a ring body (21) fixedly connected to the outer circumference of the shaft body (111), a plurality of equidistantly distributed locking teeth (22) are evenly arranged on the outer ring surface of the ring body (21), a reference plate (23) is fixedly arranged on one side of the ring body (21) facing the objective lens end of the observation lens (12), a mounting plate (24) is symmetrically fixedly arranged on one side close to each other at the top of the surveying instrument main body (1), a detection device (25) is installed on one side of the bottom of the mounting plate (24), an electric control telescopic rod (26) is fixedly installed in the middle of the bottom surface of the mounting plate (24), the telescopic shaft end of the electric control telescopic rod (26) is fixedly connected to an arc plate (27), and a plurality of matching teeth (28) are evenly arranged on the arc surface of the bottom surface of the arc plate (27), each matching tooth (28) and each locking tooth (22) are staggered, and each matching tooth (28) engages with each locking tooth (22) when it moves down to the final position; A response device (29) is provided on the top of the mounting plate (24); The detection device (25) emits laser to detect the upward deflection angle of the reference plate (23) in real time. When the deflection angle exceeds a set threshold, the controller drives the electric telescopic rod (26) to move the arc plate (27) downward and activates the response device (29); The response device (29) includes a controller and an alarm unit, and is used to receive signals from the detection device (25) and perform linkage control.
2. The portable surveying and mapping device for exploration engineering according to claim 1, characterized in that: The laser emitting end at the bottom of the detection device (25) is vertically aligned with the reference plate (23) up and down, and the coverage range of the laser forms a sector-shaped detection area, the angle range of the sector-shaped detection area covering the maximum working deflection angle of the reference plate (23).
3. The portable surveying and mapping device for exploration engineering according to claim 1, characterized in that: The detection device (25) and the electrically controlled telescopic rod (26) are both powered by the power storage module on the surveying instrument body (1).
4. The portable surveying and mapping device for exploration engineering according to claim 1, characterized in that: A movable gap is provided between the arc-shaped plate (27) and the rotating seat (11), and the movable gap is one centimeter.
5. The portable surveying and mapping device for exploration engineering according to claim 1, characterized in that: The response device (29) is configured as an audible and visual alarm, which is activated when the detection device (25) detects that the deflection angle exceeds a set threshold.
6. The portable surveying and mapping device for exploration engineering according to claim 1, characterized in that: A follow-up shielding mechanism is provided on the surveying instrument body (1) and corresponds to the position of the automatic response locking mechanism. The follow-up shielding mechanism comprises a shielding component and a linkage component. The linkage component is linked with the arc plate (27) in the automatic response locking mechanism to drive the shielding component to move and shield the objective lens end. The shielding assembly comprises: two rectangular rails (31) symmetrically fixedly connected to the outer side of the top of the surveying instrument body (1); a sleeve block (32) is slidably sleeved on each rectangular rail (31); an inclined rod (33) is fixedly provided on the side of the sleeve block (32) away from the surveying instrument body (1); a semicircular plate (34) is fixedly provided on the end of the inclined rod (33) away from the sleeve block (32); two semicircular plates (34) are provided in total; the two semicircular plates (34) are tilted and located obliquely above the objective end of the observation lens (12); both are opaque; and the two semicircular plates (34) form a complete circular plate structure in a closed state, which is used to completely shield the objective end of the observation lens (12).
7. The portable surveying and mapping device for exploration engineering according to claim 6, characterized in that: The semicircular plate (34) is made of acrylic material, and the top surface of the semicircular plate (34) is evenly coated with a black light-proof layer.
8. The portable surveying and mapping device for exploration engineering according to claim 6, characterized in that: A linkage assembly comprises two transverse plates (35) symmetrically fixedly mounted on the outer side of the top of the surveying instrument body (1), the two transverse plates (35) being located directly below the two rectangular rails (31), and the two transverse plates (35) being rotatably connected to two synchronous wheels (36) on the side away from the surveying instrument body (1), a synchronous belt (37) being transmission-connected between the two synchronous wheels (36), a bottom block (321) being fixedly provided on one side of the top of the synchronous belt (37), the top of the bottom block (321) being fixedly connected to the bottom of the sleeve block (32), a power shaft (38) being fixedly connected to the axis of the synchronous wheel (36) on the side away from the bottom block (321), a driving gear (39) being fixedly provided on one end of the power shaft (38) away from the synchronous wheel (36), and a linkage rack (310) being fixedly connected to the outer wall of one side of the arc-shaped plate (27); When the arc plate (27) moves downward, the linkage rack (310) meshes with the driving gear (39) and drives the synchronous belt (37) to move.
9. The portable surveying and mapping device for exploration engineering according to claim 8, characterized in that: After the arc-shaped plate (27) moves downward to the final position, the two semicircular plates (34) are completely closed, and at this time, the linkage rack (310) and the driving gear (39) are in a fully meshed state.
Citation Information
Patent Citations
A portable geographic survey and mapping device
CN117109546B