An auxiliary device for collecting difficult point coordinates based on GNSS-RTK

Abstract

This utility model discloses an auxiliary device for acquiring coordinates of difficult points based on GNSS-RTK, including a mounting base, a first connecting plate, and a second connecting plate. The mounting base is rotatably mounted on the centering rod of the RTK. The first connecting plate is horizontally mounted on one side of the mounting base, and three screws are vertically fixedly mounted on the first connecting plate, with the connection points of the three screws to the first connecting plate located at the three vertices of a triangle. The second connecting plate is slidably mounted on the screws, and the second connecting plate is located above the first connecting plate. A spring is sleeved on the screw, with one end of the spring abutting against the first connecting plate and the other end abutting against the second connecting plate. A wing nut is threaded onto the screw, and the wing nut is located on the side of the second connecting plate away from the first connecting plate. This utility model can assist RTK in acquiring coordinates of difficult points, making up for the shortcomings of existing RTK in measuring difficult points. It has a simple structure, is easy to operate, and can be operated by a single person.

Description

Technical Field

[0001] This utility model relates to the field of surveying and mapping technology, specifically to an auxiliary device for acquiring coordinates of difficult points based on GNSS-RTK. Background Technology

[0002] In current surveying and mapping, one of the commonly used instruments for directly acquiring the planar coordinates of points is GNSS-RTK (hereinafter referred to as RTK). It obtains point coordinates by receiving satellite signals from multiple global satellite navigation systems, including the US Global Positioning System (GPS), Russia's GLONASS, the EU's Galileo, and China's BeiDou Navigation Satellite System (BDS). It provides all-weather, all-time, and high-precision positioning. In particular, the successful launch of all BeiDou-3 satellites in my country has multiplied the number of satellites that ground-based satellite receiving equipment (GNSS-RTK) can process, resulting in faster processing speeds. GNSS-RTK can easily and quickly obtain fixed-precision solutions even in many challenging environments, becoming a multiplier of production efficiency in the surveying and mapping industry.

[0003] However, RTK also has its drawbacks in surveying and mapping. For example, in densely populated areas, satellite coordinates are often unreliable at building corners, making it difficult to obtain fixed coordinates for ground features (these points where coordinates cannot be directly acquired using RTK are collectively referred to as difficult points to be measured). There are also issues with measuring the coordinates of ground features in inaccessible areas such as the middle or opposite banks of rivers and high-voltage power lines. To address these problems with RTK, total stations are generally used for supplementary surveys. However, acquiring coordinates using a total station is cumbersome, inefficient, and prone to errors, requiring multiple people to assist, unlike the convenience, speed, and low error rate of single-person operation with RTK.

[0004] Therefore, it is necessary to design an auxiliary device that can help GNSS-RTK acquire the coordinates of difficult points. Utility Model Content

[0005] The purpose of this invention is to provide an auxiliary device for acquiring coordinates of difficult points based on GNSS-RTK, in order to overcome the shortcomings of the existing technology. It can assist RTK in acquiring coordinates of difficult points, has a simple structure, is easy to operate, and can be operated by a single person.

[0006] This utility model provides an auxiliary device for acquiring coordinates of difficult points based on GNSS-RTK, including a mounting base, a first connecting plate, and a second connecting plate;

[0007] The mounting base is rotatably mounted on the centering rod of the RTK; the first connecting plate is horizontally mounted on one side of the mounting base, and three screws are vertically fixedly mounted on the first connecting plate, with the connection points of the three screws and the first connecting plate located at the three vertices of a triangle; the second connecting plate is slidably mounted on the screws, and the second connecting plate is located above the first connecting plate; a spring is sleeved on the screw, one end of the spring abuts against the first connecting plate, and the other end abuts against the second connecting plate; a wing nut is threaded onto the screw, and the wing nut is located on the side of the second connecting plate away from the first connecting plate.

[0008] In the above-described auxiliary device for acquiring coordinates of difficult points based on GNSS-RTK, preferably, the side of the second connecting plate away from the first connecting plate is provided with an iron plate that is attracted and fixed to the laser rangefinder.

[0009] In the above-described auxiliary device for acquiring coordinates of difficult points based on GNSS-RTK, preferably, the iron sheet is located within the area enclosed by the three screws.

[0010] As described above, in an auxiliary device for acquiring coordinates of difficult points based on GNSS-RTK, preferably, one of the screws is located at the end of the first connecting plate near the mounting base, and the other two screws are located at the end of the first connecting plate away from the mounting base, and the axes of the two screws are located in the same plane.

[0011] As described above, in an auxiliary device for acquiring coordinates of difficult points based on GNSS-RTK, preferably, the mounting base is a suspended bearing with an eccentric sleeve and seat; the first connecting plate is fixedly connected to the bearing seat of the suspended bearing with an eccentric sleeve and seat by bolts.

[0012] In the above-described auxiliary device for acquiring coordinates of difficult points based on GNSS-RTK, preferably, the spring is a flat wire compression spring.

[0013] Compared with the prior art, the present invention has the following beneficial effects:

[0014] This invention can assist RTK in acquiring the coordinates of difficult points, making up for the shortcomings of existing RTK in measuring difficult points. It has a simple structure, is easy to operate, and can be operated by a single person.

[0015] This invention can be directly installed on the centering rod of an existing RTK without requiring any modifications to the existing RTK, thus reducing costs. Attached Figure Description

[0016] Figure 1This is the front view of the auxiliary device for acquiring coordinates of difficult points based on GNSS-RTK proposed in this utility model;

[0017] Figure 2 This is a schematic diagram of the structure when the laser rangefinder is installed on the second connecting plate;

[0018] Figure 3 yes Figure 2 Top view;

[0019] Figure 4 This is a side view of a suspended bearing with an eccentric sleeve and seat.

[0020] Figure 5 This is a top view of a suspended bearing with an eccentric sleeve and seat without the eccentric sleeve installed.

[0021] Figure 6 This is a structural schematic diagram of the first connecting plate;

[0022] Figure 7 This is a structural schematic diagram of the second connecting plate;

[0023] Figure 8 This is a schematic diagram of the installation structure of the iron sheet and the second connecting plate;

[0024] Figure 9 This is a schematic diagram illustrating the connection and installation process between the auxiliary device and the RTK.

[0025] Figure 10 This is a schematic diagram of the structure after the auxiliary device is connected to the RTK.

[0026] Figure 11 The present invention provides an auxiliary device for acquiring coordinates of difficult points based on GNSS-RTK, which measures the coordinates of the difficult points to be measured.

[0027] Explanation of reference numerals in the attached figures:

[0028] 1-Mounting base, 2-First connecting plate, 3-Second connecting plate, 4-Centering rod, 5-Screw, 6-Spring, 7-Wing nut, 8-Laser rangefinder, 9-Iron sheet, 10-Washer, 11-Bearing, 12-Eccentric sleeve, 13-Bearing housing, 14-Bolt, 15-Locking nut, 16-RTK receiver, 17-Circular spirit level, 18-Centering rod height adjustment screw, 201-First mounting hole, 301-Second mounting hole. Detailed Implementation

[0029] The embodiments described below with reference to the accompanying drawings are exemplary and are only used to explain the present invention, and should not be construed as limiting the present invention.

[0030] Embodiment 1 of this utility model: As shown Figures 1-10As shown, this utility model proposes an auxiliary device for acquiring coordinates of difficult points based on GNSS-RTK, including a mounting base 1, a first connecting plate 2, and a second connecting plate 3;

[0031] Mounting base 1 is rotatably mounted on the centering rod 4 of the RTK, meaning mounting base 1 can rotate around the centering rod 4. First connecting plate 2 is horizontally fixedly mounted on one side of mounting base 1. First connecting plate 2 and mounting base 1 can be fixedly connected by welding, bolts 14, or be a single integral structure. Three screws 5 are vertically fixedly mounted on first connecting plate 2. The connection points of the three screws 5 and first connecting plate 2 are located at the three vertices of a triangle, meaning the axes of the three screws 5 are not in the same plane. Second connecting plate 3 is slidably mounted on the screws 5, and is located above first connecting plate 2. Second connecting plate 3 is used to mount the laser rangefinder 8. A spring 6 is sleeved on screw 5, with one end abutting against first connecting plate 2 and the other end abutting against second connecting plate 3, providing elastic support. A wing nut 7 is threaded onto screw 5, located on the side of second connecting plate 3 away from first connecting plate 2. As one implementation, the side of the second connecting plate 3 away from the first connecting plate 2 is fixedly provided with an iron plate 9 that is magnetically attracted and fixed to the laser rangefinder 8. The laser rangefinder 8 has a built-in magnetic attraction function and an electronic level bubble. Of course, in specific implementations, the laser rangefinder 8 can also be fixedly connected to the second connecting plate 3 in other ways, such as by bolts, snap-fit, or rope binding. The second connecting plate 3 can be an acrylic plate, steel plate, etc. The spring 6 can be a flat wire compression spring.

[0032] The three wing nuts 7 can be manually rotated up and down to compress the spring 6, thereby changing the tilt state of the second connecting plate 3, and adjusting the horizontal state of the laser rangefinder 8 mounted on the second connecting plate 3 to ensure that the distance measured by the laser rangefinder 8 is a horizontal distance.

[0033] Furthermore, the iron sheet 9 is fixed to the second connecting plate 3 by bonding or welding, and the iron sheet 9 is located in the area enclosed by the three screws 5. One screw 5 is located at the end of the first connecting plate 2 near the mounting base 1, and the other two screws 5 are located at the end of the first connecting plate 2 away from the mounting base 1, and the axes of the two screws 5 are in the same plane.

[0034] As one implementation, the mounting base 1 is a suspended bearing with an eccentric sleeve and seat; the first connecting plate 2 is fixedly connected to the bearing housing 13 of the suspended bearing with an eccentric sleeve and seat by bolts 14, such as... Figure 2As shown, the first connecting plate 2 is fixedly connected to the bearing seat 13 by three bolts 14. The first connecting plate 2 has three first mounting holes 201. One first mounting hole 201 is located at the end of the first connecting plate 2 near the mounting base 1, and the other two first mounting holes 201 are located at the end of the first connecting plate 2 away from the bearing seat 13. One end of the screw 5 has a screw head. The three screws 5 pass through the three first mounting holes 201 respectively. The screw heads of the screws 5 abut against the lower surface of the first connecting plate 2. A locking nut 15 is threaded onto the screw 5 and abuts against the upper surface of the first connecting plate 2. The locking nut 15 and the screw head of the screw 5 together clamp the first connecting plate 2, thus fixing the screw 5 onto the first connecting plate 2. Alternatively, a nut can be used instead of a screw head. The second connecting plate 3 has three second mounting holes 301 corresponding to the first mounting holes 201. The second mounting holes 301 cooperate with the screws 5, and the second connecting plate 3 is slidably mounted on the screws 5 through the second mounting holes 301. The bearing 11 of the suspended bearing with eccentric sleeve and seat is used to be sleeved on the centering rod 4, and the eccentric sleeve 12 of the suspended bearing with eccentric sleeve and seat is used to fix the bearing 11 on the centering rod 4.

[0035] To prevent damage to the surface of the second connecting plate 3 when rotating the wing nut 7, a washer 10 can be placed between the wing nut 7 and the second connecting plate 3. Alternatively, a washer 10 can be placed at the contact point between the spring 6 and the second connecting plate 3 and the first connecting plate 2, so that both ends of the spring 6 abut against the second connecting plate 3 and the first connecting plate 2 respectively through the washer 10.

[0036] Auxiliary device and RTK assembly instructions: Mount the auxiliary device of this application onto the RTK's centering rod 4 using a suspended eccentric sleeve bearing at an appropriate height. Then, fit the eccentric sleeve 12 onto the RTK and tighten it securely. See [link to documentation]. Figures 9-10 As shown. Install the RTK receiver 16 onto the centering rod 4, and place the laser rangefinder 8 with magnetic attraction function on the iron plate 9 on the second connecting plate 3 for secure attraction.

[0037] The steps for obtaining the coordinates of difficult points are as follows: Select 2-3 arbitrary locations with good satellite signals approximately 15-30 meters away from the difficult point to be measured, and set up the RTK as measurement points. Here, we take setting up the RTK at 3 locations as an example. Figure 11 As shown, adjacent measuring points and the difficult points to be measured (such as room corners) are arranged to form an equilateral triangle as closely as possible. The planar coordinates of the current position are collected at each measuring point, and the horizontal distance from the current position to the difficult point to be measured is obtained through the auxiliary device of this application. Specifically: after leveling the RTK centering rod 4 equipped with the auxiliary device (the centering rod 4 has a circular level bubble 17, and the centering rod 4 is also equipped with a centering rod height adjustment screw 18 for adjusting the height of the centering rod 4, see...), Figure 9Open the laser rangefinder 8, which is attached to the iron plate 9 of the second connecting plate 3. Rotate the auxiliary device to make the laser spot of the laser rangefinder 8 hit the difficult measurement point. Then rotate the three wing nuts 7 on the second connecting plate 3 on the adjustment auxiliary device to change the tilt state of the second connecting plate 3, thereby adjusting the horizontal state of the laser rangefinder 8 with the electronic level bubble on the second connecting plate 3, so that the electronic level bubble of the laser rangefinder 8 is horizontal. Ensure that the laser rangefinder 8 is horizontal, and press the distance measurement button on the laser rangefinder 8. The collected distance is the horizontal distance from the centering rod 4 of the RTK to the difficult measurement point. Adjusting the horizontal state of the second connecting plate 3 will change the posture of the laser rangefinder 8, causing a slight change in the position of the laser spot at the difficult measurement point. By slightly rotating the auxiliary device, the laser spot can be returned to the difficult measurement point. In actual adjustment, there are no restrictions on the adjustment steps, as long as the laser spot hits the difficult measurement point when the laser rangefinder 8 is horizontal. The collection distance is controlled within 30 meters, which is easy to implement and ensures accurate measurement values. Because there is a fixed distance difference (i.e., a distance measurement constant) between the laser rangefinder's measuring starting point and the center of the RTK's centering rod 4, this constant can be obtained by comparing multiple known distances; the difference is the constant. Each laser rangefinder measurement plus the constant yields the corrected distance from the centerline of the RTK's centering rod 4 to the difficult measuring point. Since RTK measurement accuracy is at the centimeter level, this method of distance acquisition results in an error of only a few millimeters, achieving the same accuracy as direct RTK coordinate acquisition. The plane coordinates and distances of the three acquired positions (e.g.,...) are then used to determine the correct distance. Figure 11 By using this method, two sets of planar coordinates of the difficult point to be measured can be calculated, and the average value can be taken as the final value, thus making up for the shortcomings of RTK in measuring difficult places.

[0038] The principle of calculating the plane coordinates of the difficult point to be measured: Using the coordinates and distances of the three positions set up by RTK, the plane coordinates of the difficult point to be measured are calculated by the distance intersection method. This step can be programmed and calculated quickly using a programming calculator.

[0039] The basic principles of this utility model have been described above with reference to specific embodiments. However, it should be noted that the advantages, benefits, and effects mentioned in this utility model are merely examples and not limitations, and should not be considered as essential features of each embodiment of this utility model. Furthermore, the specific details disclosed above are for illustrative and facilitative purposes only, and are not limitations. These details do not limit the utility model from being implemented using the aforementioned specific details.

[0040] The block diagrams of the devices, apparatuses, equipment, and systems involved in this utility model are merely illustrative examples and are not intended to require or imply that they must be connected, arranged, or configured in the manner shown in the block diagrams. As those skilled in the art will recognize, these devices, apparatuses, equipment, and systems can be connected, arranged, and configured in any manner. Words such as “comprising,” “including,” “having,” etc., are open-ended terms meaning “including but not limited to,” and are used interchangeably with them. The terms “or” and “and” as used herein refer to the terms “and / or,” and are used interchangeably with them unless the context clearly indicates otherwise. The term “such as” as used herein refers to the phrase “such as but not limited to,” and is used interchangeably with it.

[0041] Additionally, as used herein, the “or” used in a list of items beginning with “at least one” indicates a separate list, such that a list of, for example, “at least one of A, B, or C” means A or B or C, or AB or AC or BC, or ABC (i.e., A and B and C). Furthermore, the word “exemplary” does not imply that the described example is preferred or better than other examples.

[0042] It should also be noted that in the system and method of this utility model, the components or steps can be disassembled and / or recombined. These disassemblies and / or recombinations should be considered as equivalent solutions of this utility model.

[0043] Various changes, substitutions, and modifications can be made to the technology described herein without departing from the teachings defined by the appended claims. Furthermore, the scope of the claims of this utility model is not limited to the specific aspects of the processes, machines, manufacturing processes, events, means, methods, and actions described above. Currently existing or later-developed processes, machines, manufacturing processes, events, means, methods, or actions that perform substantially the same function or achieve substantially the same result as the corresponding aspects described herein can be utilized. Therefore, the appended claims include such processes, machines, manufacturing processes, events, means, methods, or actions within their scope.

[0044] The above description of the disclosed aspects is provided to enable any person skilled in the art to make or use the present invention. Various modifications to these aspects will be readily apparent to those skilled in the art, and the general principles defined herein can be applied to other aspects without departing from the scope of the present invention. Therefore, the present invention is not intended to be limited to the aspects shown herein, but rather to be carried out within the widest scope consistent with the principles and novel features disclosed herein.

[0045] The above description has been given for purposes of illustration and description. Furthermore, this description is not intended to limit the embodiments of the present invention to the forms disclosed herein. Although numerous exemplary aspects and embodiments have been discussed above, those skilled in the art will recognize certain variations, modifications, alterations, additions, and sub-combinations therein.

Claims

1. An auxiliary device for collecting difficult point coordinates based on GNSS-RTK, characterized in that: It includes a mounting base (1), a first connecting plate (2), and a second connecting plate (3); The mounting base (1) is rotatably mounted on the centering rod (4) of the RTK; the first connecting plate (2) is horizontally mounted on one side of the mounting base (1), and three screws (5) are vertically fixed on the first connecting plate (2), with the connection points of the three screws (5) and the first connecting plate (2) located at the three vertices of a triangle; the second connecting plate (3) is slidably mounted on the screws (5), and the second connecting plate (3) is located above the first connecting plate (2); a spring (6) is sleeved on the screw (5), with one end of the spring (6) abutting against the first connecting plate (2) and the other end abutting against the second connecting plate (3); a wing nut (7) is threaded on the screw (5), and the wing nut (7) is located on the side of the second connecting plate (3) away from the first connecting plate (2).

2. The GNSS-RTK based auxiliary device for collecting difficult point coordinates according to claim 1, characterized in that: The second connecting plate (3) has an iron plate (9) on the side away from the first connecting plate (2) that is attracted and fixed to the laser rangefinder (8). 3.The GNSS-RTK based device for collecting difficult point coordinates of claim 2, wherein: The iron sheet (9) is located within the area enclosed by the three screws (5).

4. The GNSS-RTK based auxiliary device for collecting difficult point coordinates according to claim 1, characterized in that: One of the screws (5) is located at the end of the first connecting plate (2) near the mounting base (1), and the other two screws (5) are located at the end of the first connecting plate (2) away from the mounting base (1), and the axes of the two screws (5) are in the same plane.

5. The GNSS-RTK based difficult point coordinate acquisition aid of claim 1, wherein: The mounting base (1) is a suspended bearing with an eccentric sleeve and seat; the first connecting plate (2) is fixedly connected to the bearing seat (13) of the suspended bearing with an eccentric sleeve and seat by bolts (14).

6. The GNSS-RTK based device for collecting coordinates of difficult points according to any one of claims 1-5, characterized in that: The spring (6) is a flat wire compression spring.

Images