JP7217483B1 - Pile core position investigation system - Google Patents

Abstract

A system for surveying pile core locations. A base station that provides RTK correction information, a survey robot that stores design drawing data in which a plurality of reference points are recorded, and RTK positioning of its own position via the base station. and means for RTK positioning the reference point indicated by the design drawing data, and RTK the pile core coordinates of the design drawing data based on the coordinates of the positioned reference point. After converting to the coordinate system and arriving at the converted pile core coordinates by self-running, error correction is performed with an XY plotter, and the pile core determined by the conventional method covered with a special marker is photographed by the 3D imaging means. , detecting the pile core position by image recognition and calculating the error from the pile core coordinates. [Selection drawing] Fig. 1

Description

The present invention relates to an RTK pile core position survey robot system that automates the survey of pile core positions.

Confirmation of the pile core position is the most important item in foundation pile construction, but it requires visual measurement by a skilled engineer of foundation pile construction, and position confirmation errors may occur due to individualized judgment. If the number of skilled engineers decreases due to the aging of society, errors due to individual judgments are expected to increase further. As an example of solving such problems, an automated system using an autonomous mobile robot has been expected. In recent years, RTK (Real Time Kinematics) positioning has become widespread, and it has become possible to confirm the pile core position with an error within a few centimeters using satellites. By positioning the position of the pile core by using the method, it is possible to detect errors and check the accuracy by comparing the positioning results of the conventional method. In addition, by introducing a self-propelled robot, it is possible to save labor in confirming the pile core position.

Examples of the prior art of the present application include the following patent documents.

Patent Document 1 proposes a system in which an optical surveying instrument is set at a reference point, the position of the core of the pile is marked, and the marked position is confirmed by a GPS surveying instrument before driving the pile. there is

In Patent Document 2, a plurality of images of a construction site including piles are captured using a camera, a three-dimensional model of the construction site is generated, a pile head is detected from the three-dimensional model, and the detected pile A system has been proposed that determines the consistency between the head and pre-acquired design information.

Japanese Patent Application Laid-Open No. 2002-202357 JP 2019-066242 A

One of the objects of the present invention is an RTK pile core position investigation robot system for investigating the error from the design value for temporary piles indicating the pile core position that is determined in advance by another method and marked on the site. to provide. When the measurement according to the present invention is performed prior to the measurement according to the conventional method, it is possible to provide a reference position in advance to the measurement according to the conventional method, thereby saving labor in the measurement.

In the RTK pile core position investigation system of the present invention, the RTK coordinates obtained by converting the RTK positioning are converted according to the dimensions and directions on the design drawing of the construction site. At this time, since the X-axis and Y-axis, which are the standards of the construction site on the blueprint, are not determined according to the north, south, east, west direction, the north, south, east, west coordinates converted from the latitude and longitude information of RTK positioning are used as the coordinates on the blueprint. To express this, it is necessary to correct the angle in accordance with the X-axis direction and the Y-axis direction on the design drawing. Angle correction is performed by obtaining a correction angle from the difference between two points of the RTK positioning result that are used as references for angle correction and two points on the design drawing, and rotating the entire RTK acquisition result using the correction angle. In addition, since the RTK acquisition result may have an error of several cm depending on the surrounding environment and the situation of the GNSS satellite, the two reference points used for angle correction are also used for distance correction, and the distance between the two RTK points and By matching the distance between two points on the drawing, a reference value for RTK distance correction for the entire construction site to be measured is obtained. In the investigation of the pile core position, the angle and distance between one point that is the zero position of the x-axis and y-axis of the construction site and the RTK acquisition result are rotated using the correction angle derived by the above method, Fine adjustment is performed using the ratio to the reference distance, and conversion is made to millimeter coordinate values of the x-axis and y-axis from the zero position. When measuring the error of the position of the pile core marked on the site, the distance difference in each direction of the straight line, x-axis, and y-axis is obtained by comparing with the RTK positioning result of this system. The difference in distance is stored in this system, and if the linear distance exceeds the allowable error, it prompts reconfirmation of the pile core marking position, and together with the error display in the x-axis and y-axis directions, it is used to correct construction accuracy. When comparing the RTK coordinates and the pile core position, the pile core covered with the dedicated marker is photographed with a 3D camera, the pile core position is detected by image recognition, and the error with the pile core coordinates acquired by the RTK is calculated. The special marker uses a color scheme specific to the construction site in order to improve the accuracy of detection of piles that are discolored by earth and sand through image processing.

The dedicated markers and the image recognition of this system can also be used for coordinate measurement of arbitrary positions within the construction site. When measuring an arbitrary position, the center position of a dedicated marker installed at an arbitrary position is specified by image recognition, RTK positioning is performed, and the above-mentioned angle correction and distance correction are performed to obtain the locus x-coordinate and y-coordinate of the arbitrary position. Obtained as the distance from the zero position on the blueprint.

The distance between the RTK coordinates obtained by this system and the x-axis and y-axis coordinates on the design drawing and the pile core marking position is stored in the system, and the coordinate drawing on the design drawing image and the distance list format, etc. , can be viewed in any way.

As a means to automatically reach and install the RTK pile core position investigation system within the error measurement range centered on the dedicated marker, it is installed in the outdoor autonomous traveling robot at the construction site described in the next section.

The construction site outdoor autonomous mobile robot uses the construction site drawing data and the point specified in the drawing data converted to RTK coordinates as the target point, and the robot acquires its own position with the RTK module installed in itself. While specifying the distance between the RTK coordinates and the RTK coordinates of the target point, the vehicle travels toward the target point. While driving, the 3D camera mounted in front of the machine captures the ground condition, recognizes the image, and classifies whether it can run or not, and avoids places that hinder driving such as unevenness such as heavy equipment running tracks, excavated earth and sand, and puddles after rain. Detect as a place to be. Avoidance actions are automatically selected from slip prevention by low-speed driving, bumping over bumps by high-speed driving, and complete avoidance by changing direction, by matching images acquired with a 3D camera with point data that has been learned in advance and classified by avoidance action. , is executed. When avoiding by turning, the surroundings are searched by LiDAR (Light Detection And Ranging) and a 3D camera, and the driving route is reset.
Targets for low-speed driving: Downhills, mud that does not interfere with running and internal mechanisms Targets for high-speed driving: Soil at an angle and height that can be overcome, steps with iron plates Targets for direction change: Locations where LiDAR cannot obtain reflection (puddles or large dents and
(deemed), high-speed driving, low-speed driving, places where each upper limit is exceeded
Obstacles that were not shown in the drawings Objects for normal driving: Places below the lower limits of the short grass, high-speed driving, and low-speed driving targets

The RTK positioning system of the present invention is effective in confirming the accuracy of pile core positions obtained by conventional methods at construction sites and in correcting construction errors. In addition, the RTK autonomous mobile robot of the present invention enables automatic positioning of multiple points simply by indicating the measurement position using a dedicated marker, which is effective in improving work efficiency.
Other objects, features and advantages of the present invention will become apparent from the following description of embodiments of the invention taken in conjunction with the accompanying drawings.

FIG. 1 is a block diagram showing the configuration of an RTK pile core position investigation robot system according to an embodiment of the present invention. FIG. 2 is a block diagram showing the configuration of the RTK pile core position investigation system used in the RTK pile core position confirmation system according to one embodiment of the present invention. FIG. 3 is a block diagram showing the configuration of an RTK base station used in the RTK pile core position confirmation system according to one embodiment of the present invention. FIG. 4 shows an example of information processing of the RTK pile core position confirmation system according to one embodiment of the present invention. FIG. 5 shows an example of a pile core position detection marker used in the RTK pile core position confirmation system according to one embodiment of the present invention. FIG. 6 shows an example of information processing for detecting the pile core position detection marker used in the RTK pile core position confirmation system according to one embodiment of the present invention. FIG. 7 shows a configuration example in which an RTK pile core position confirmation system according to an embodiment of the present invention is mounted on an RTK autonomous mobile robot according to an embodiment of the present invention and operated. FIG. 8 shows an example of data processing of information processing of the RTK pile core position confirmation system according to one embodiment of the present invention. FIG. 8 shows an example of data processing of information processing of the RTK pile core position confirmation system according to one embodiment of the present invention. FIG. 8 shows an example of data processing of information processing of the RTK pile core position confirmation system according to one embodiment of the present invention. FIG. 9A shows another example of data processing for information processing of the RTK pile core location system according to one embodiment of the present invention. FIG. 9B shows another example of data processing for information processing of the RTK pile core location system according to one embodiment of the present invention. FIG. 9C shows another example of data processing for information processing of the RTK pile core location system according to one embodiment of the present invention. FIG. 10 is a block diagram showing the configuration of a construction site autonomous mobile robot according to an embodiment of the present invention. FIG. 11 shows an example of information processing of a construction site autonomous mobile robot according to an embodiment of the present invention. FIG. 12 shows an example of information processing of a construction site autonomous mobile robot according to an embodiment of the present invention. FIG. 13 shows an example of travel route determination processing of the construction site autonomous mobile robot according to an embodiment of the present invention. FIG. 14 shows an example of a process for judging whether or not a construction site autonomous mobile robot can travel according to an embodiment of the present invention.

FIG. 1 is a block diagram showing the configuration of an RTK pile core position investigation robot system 100 according to an embodiment of the present invention.

An RTK pile core position investigation robot system 100 of this embodiment includes an RTK pile core position investigation system 200 , an RTK base station 300 , and a construction site autonomous mobile robot 400 .

The RTK pile core position investigation system 200 is a system that utilizes RTK positioning to investigate the pile core position.

The RTK base station 300 is means for improving the RTK measurement accuracy when the RTK pile core position investigation system performs RTK positioning of the pile core position.

Of the RTK base station 300, the RTK positioning function may be replaced with an existing base station such as a pay service. When replacing the RTK positioning function with a paid service, the RTK module 310 from the RTK base station 300 becomes unnecessary.

The construction site autonomous traveling robot 400 is a robot that autonomously travels toward a destination on the ground outside the construction site using RTK positioning, image analysis, and sensor information.

FIG. 2 shows, in block diagram form, the configuration of an RTK pile core location survey system 200 for use in a system according to one embodiment of the present invention.

The RTK pile core position investigation robot 200 is composed of an RTK module 210 , an RTK module position adjustment mechanism 220 , a laser irradiation mechanism 230 , a battery 240 , a 3D camera 250 and an Internet connection 260 .

The RTK module 210 is a means for performing RTK surveys.

The RTK module positioning mechanism 220 is a means for holding the RTK module 210 vertically from the ground and a means for moving the RTK module horizontally. Since the RTK module autonomously moves with respect to the coordinates given by the operator, the RTK module position adjusting mechanism moves the RTK module to the target point according to the horizontal longitudinal and lateral movement distance information given from the RTK module.

The laser marker irradiation mechanism 230 is means for irradiating a laser beam vertically downward from the arrival point of the RTK module to clearly indicate the arrival point indicated by the RTK module.

Battery 240 is a means of supplying energy to operate the entire system.

The 3D camera 250 is means for searching for a measurement point recognition dedicated marker placed on a point to be measured such as a pile center.

The Internet connection 260 is a means for transmitting/receiving RTK correction information via the Internet to/from an RTK base station 300 (to be described later) and transmitting/receiving measurement point information and measurement results to/from the DB server 330 .

FIG. 3 illustrates, in block diagram form, the structure of an RTK base station 300 for use in a system according to one embodiment of the invention.

The RTK base station 300 includes an RTK module 310 , network connection 320 , DB server 330 , RTK coordinate conversion/adjustment 340 , and battery 350 .

The RTK module 310 is a means for performing RTK surveys.

A network connection 320 is means for connecting to the Internet.

The DB server 330 is a means for establishing and maintaining a connection between the RTK pile core investigation system 200 and the RTK base station 300 and sharing measurement reference point information.

The RTK coordinate conversion/analysis 340 holds RTK measurement reference point information, calculates and holds angle and scale correction values for plotting the RTK positioning results on the site drawing data, and measures points captured by the 3D camera 260 or the like. It is means for performing image processing for specifying a measurement point from the recognition dedicated marker, distance measurement between the RTK positioning target position specified by the RTK module 210 and the measurement target point after image processing, and error analysis.

Battery 350 is a means of supplying energy for operating the entire RTK base station 300 .

FIG. 4 illustrates an example of information processing in a system according to one embodiment of the present invention.

In S4010, the base station and wireless network environment are prepared. Specifically, the device is connected to the network. Also, an RTK base station will be installed. It is desirable to install the RTK base station inside the construction site where RTK positioning is targeted, but if the construction site is surrounded by obstructions such as buildings and RTK positioning is difficult, the RTK base station should be placed within a radius of about 10km with a good view. may be installed. Note that the RTK base station may be replaced with an existing base station such as a paid service.

In S4020, a marker dedicated to target position registration is installed at the target point for RTK positioning. Specifically, when using RTK positioning to check the accuracy of the accuracy confirmation target point that has been positioned and installed by another method such as a pile core, a dedicated marker is installed on the accuracy confirmation target point, and the RTK positioning and design drawing of the arbitrary point are used. When only plotting the positioning points on the data, a dedicated marker is placed on the ground to be positioned.

In S4030, RTK positioning of the positioning target point is performed. Specifically, the target pile core position data is registered in the pile core position investigation system, the pile core position investigation system main body is installed on the dedicated marker, a survey start command is issued, and RTK positioning of the positioning target point is performed. When measuring the difference between the positioning target point and the target pile core position data, the RTK module performs RTK positioning according to the target pile core position data input in advance, and converts the difference from the target point from RTK coordinates to millimeter information XY It is transmitted to the RTK position adjustment mechanism as movement instruction information on the plane, and the RTK position adjustment mechanism moves the RTK module based on the transmitted movement instruction information. When performing RTK positioning of an arbitrary point, the RTK module is moved by the RTK position adjustment mechanism vertically above the center position of the dedicated marker detected by the 3D camera from the position where the RTK pile core position investigation system is installed. If there are a plurality of positioning target points, the plurality of positioning target points are registered, and the RTK positioning of S4030 is repeated. In addition to detecting the dedicated marker, the 3D camera photographs the arrival point of the RTK module and records it as an inspection position photograph for output to a report described later.

In S4040, two points among the RTK positioning results acquired in S4030 are set as reference points for matching with construction site data, and angle correction and distance correction are performed.

In S4050, the RTK positioning result obtained in S4030 is rotated by the angle correction value calculated in S4040, and scale adjustment is performed using the distance correction ratio.

In S4060, the difference between the dedicated marker position and the RTK positioning result is calculated using the RTK positioning result corrected in S4050. At this time, the x, y coordinate start position of the design drawing data is set to the zero point, and the differences in the straight distance, x distance, and y distance between the target point and the RTK acquisition result are calculated. When performing RTK positioning on a dedicated marker at an arbitrary point, the distance difference calculation is not performed, and the x and y coordinate points of the dedicated marker position are set to the zero point with the x and y coordinate start positions of the design drawing data Calculate only. When S4060 is completed for all the target pile core position data, the pile core position confirmation ends. Concretely, a survey report is created and then finished.

8 and 9 show an example of data processing for information processing in the system according to one embodiment of the present invention.

FIG. 5 shows an example of pile core position detection markers used in a system according to an embodiment of the present invention.

The special marker of this embodiment uses a color scheme specialized for construction sites in order to improve the accuracy of detection of pile cores that are discolored by earth and sand by image processing. Preferably, the shape of the detection marker is umbrella-shaped or disk-shaped. Preferably white on the outside with a blue fill in the middle. Uses "matte" with less reflection. Furthermore, a peephole is provided in the center so that the cross mark on the stake or wooden stake can be checked. Accordingly, installation accuracy can be ensured. Well, the outer white background allows memos to be written.

FIG. 6 shows an example of information processing for detecting the pile core position detection marker used in the system according to one embodiment of the present invention, and shows in detail a part of the information processing of S4060. .

In S7010, a color within a specific range (blue in this embodiment) is extracted.

In S7020, the image is smoothed.

In S7030, edges are detected by the Canny method. The Canny edge detector is an algorithm that detects contour (edge) portions of an image. Here, the Canny method is one of algorithms for edge detection.

At S7040, region extraction is performed.

At S7050, the minimum circumscribed circle is detected.

FIG. 7 shows a configuration example in which an RTK pile core position confirmation system according to an embodiment of the present invention is mounted on an RTK autonomous mobile robot according to an embodiment of the present invention and operated.

Figures 8A, 8B, and 8C illustrate an example of data processing for information processing in a system according to one embodiment of the present invention. In the dedicated marker position RTK positioning of the system according to the present invention, the corrected GNSS information is acquired, converted to RTK coordinates, and then given the scale of the construction site and the correction angle, and the RTK positioning result is arranged on the construction site blueprint data. be done. When comparing the arranged data and the pile core position, each coordinate of the pile core position and the RTK position and the difference in distance are drawn on the design drawing data.

9A, 9B, and 9C illustrate another example of data processing for information processing in a system according to one embodiment of the present invention. Since the RTK positioning result, the pile core position coordinates, the reference correction angle and the scale are input and output as text data, the configuration of the drawing screen is not uniform and can be designed flexibly.

FIG. 10 is a block diagram showing the configuration of a construction site autonomous mobile robot according to an embodiment of the present invention.

The construction site autonomous running robot is composed of an RTK module 410 , Internet connection 420 , LiDAR 430 , route analysis 440 , suspension 450 and movement mechanism 460 . The RTK module 410 is means for positioning the self position and the target point to be reached by RTK, and is composed of RTK1 for positioning the self position and RTK2 and RTK3 for recognizing the head direction of the robot. RTK2 and RTK3 are arranged at left and right positions that are equidistant from RTK1 behind RTK1 with respect to the head direction. It is assumed that the head of the robot body is heading toward the target point, and if RTK2 and RTK3 are close to the RTK coordinates of the target point, the head of the robot body is considered to face the opposite direction of the target point. RTK2 and RTK3 determine the traveling direction of the robot main body, and RTK1 determines the traveling direction by measuring the distance to the target point.

Internet connection 420 exchanges RTK correction information with RTK base station 300 via the Internet.

The LiDAR 430 collects obstacle information around the robot system 400 with laser light. The sensors used for LiDAR430 are 3D cameras, 3D-LiDAR, and the like. Collected obstacle information is used by path analysis 440 for travel route correction.

The route analysis 440 uses the RTK positioning information acquired by the RTK module 410, the peripheral obstacle information acquired by the route analysis 440, and the motor torque information acquired by the movement mechanism 460 described later to determine the route to the target point. Correct the driving route.

Suspension 450 protects each mechanism arranged on the upper part from vibration during running by movement mechanism 460 to prevent failure, and stabilizes positioning of RTK 410 .

In the case of installing and operating the RTK pile core position confirmation system and the RTK autonomous traveling robot shown in FIG. 7, the RTK module installed in the RTK pile core position confirmation system It also serves as the RTK1 that performs self-positioning, and the RTK1 can be omitted.

FIG. 11 shows an example of information processing of a construction site autonomous mobile robot according to an embodiment of the present invention.
In S11010, base station/network environment preparation is performed.
In S11020, robot system target coordinate setting is performed.
At S11030, the initial position of the robot system is determined.
At S11040, the robot system autonomously travels.

FIG. 12 shows an example of information processing of a construction site autonomous mobile robot according to an embodiment of the present invention.

When the construction site autonomous traveling robot receives a travel instruction from the worker, it performs RTK positioning of its own position by RTK self-positioning S12010, and based on the target point coordinates obtained by RTK conversion of the dedicated marker coordinates passed from the blueprint data Determine a travel route in a straight line to a target point.

In the peripheral obstacle search of S12020, 3D data of peripheral obstacle information is collected by LiDAR, and the existence of untravelable places around the travel route acquired by the RTK self-positioning of S12010 is clarified.

In determining the route and relay points in S12030, the RTK positioning result obtained in S12010 and the 3D data of the impassable location information obtained in S12020 are superimposed, and if there is an impassable location on the route to the target point coordinates, A detour route is determined on data in which 3D data and blueprint data are superimposed. When the target point is out of the LiDAR reachable range due to the detour, a relay point is determined at a travelable place within the LiDAR reachable range, converted to RTK coordinates, and used as the next destination information. Detour route setting using this surrounding obstacle information can be done independently through reinforcement learning based on pre-learning data using separately collected image information of the construction site ground and motor load information on robot travel. good.

Traveling in S12040, ground condition detection/route correction in S12050, and traveling in S12060 indicate that detour routes and relay points are determined repeatedly by collecting peripheral obstacle information until reaching the target point in S12070.

After reaching the target point in S12070, if there is the next target point information, the information processing in FIG. 12 is repeated with the coordinates obtained by RTK conversion of the next target point information as the target point. Further, when the pile core position positioning process of the RTK pile core investigation system 200 is specified after reaching the target point in S12070, this information processing waits until receiving the end determination from the pile core position positioning process, and then performs the following processing. It shifts to the determination of the presence or absence of target point information and the continuation of this information processing.

FIG. 13 shows an example of travel route determination processing of the construction site autonomous mobile robot according to an embodiment of the present invention.

In the puddle measurement and detour map creation in S13010, as a result of illuminating the surroundings with LiDAR, areas where reflection is not obtained are judged to be puddles or other ground conditions that are not suitable for driving, and based on the RTK destination information and blueprint data Create detour route and relay point information.

In step S13020, measuring unevenness and creating a speed adjustment map, the amount of motor torque required for the autonomous mobile robot to overcome is assumed based on the information on unevenness existing on the route selected as a detour route among the results of illumination of the surrounding area by LiDAR. Calculate the speed at which the The calculation may be performed by reinforcement learning using the motor torque number and speed information obtained by manually traveling the construction site separately with the same moving mechanism as pre-learning data.

FIG. 14 shows an example of a process for judging whether or not a construction site autonomous mobile robot can travel according to an embodiment of the present invention.

In S14010, the crawler torque is obtained from the moving mechanism.

In S14020, the traveling speed of the robot main body is calculated from the crawler torque acquired in S14010 and the acceleration and inclination information of the robot main body.

In reading the speed adjustment map in S14030, the traveling speed to be output by the moving mechanism when the ground condition does not impede traveling, such as slipping, is acquired as traveling speed information at each point on the traveling route.

In S14040, the estimated velocity at the current position is acquired. The estimated velocity information at each point on the route obtained by reading the velocity adjustment map in S14030 is compared with the self-position of the robot main body acquired by RTK, and the estimated velocity at the robot's self-position on the route is calculated. to get

In the running speed prediction/actual comparison in S14050, the scheduled speed at the RTK self-position acquired in S14040 Current location scheduled speed acquisition is compared with the running speed of the robot main body acquired in S14020.

In the stop/detour decision of S14060, it is determined whether or not the difference in expected/actual speed exceeds the threshold value that prevents the movement of the moving mechanism from the results of the actual/predicted traveling speed comparison of S14050. conduct.

In determining the peripheral route and relay points in S14070, the same detour route and relay points as in S12010, S12020, and S12030 are determined as RTK self-positioning in S14071, surrounding obstacle search in S14072, and route and relay point determination in S14073. . 13 may be calculated by reinforcement learning using the motor torque number and speed information obtained by manually traveling the construction site separately with the same moving mechanism as pre-learned data.

Although the embodiment of the present invention has been described as above, various alternatives, modifications, or variations are possible for those skilled in the art based on the above description, and the present invention can be implemented in various ways without departing from the scope of the invention. It encompasses alternatives, modifications or variations.

Claims (3)

A system for investigating a pile core position of a pile core,
a base station that provides RTK correction information;
A survey device,
3D imaging means for imaging the dedicated marker;
means for recording design drawing data in which a plurality of reference points are recorded;
means for performing RTK positioning on the dedicated marker via the base station by identifying the center position of the imaged dedicated marker and moving vertically above the center position of the dedicated marker. equipment and
with
The survey device performs RTK positioning of the two reference points on which the dedicated markers are installed , converts the distance between the two reference points obtained by the RTK positioning into RTK coordinates in a planar rectangular coordinate system, and then determines the azimuth angle . Angle correction value obtained by converting east-west and north-south directions based on the x-axis and y-axis directions of the design drawing data , and distance correction obtained by comparing the distance between two reference points on the design drawing data. Deriving the ratio, specifying the center position of the dedicated marker imaged by the 3D imaging means on the pile core covered with the dedicated marker, and fixing the means for performing RTK positioning vertically above the dedicated marker , the pile core coordinates converted into coordinates on the design drawing data using the angle correction value and the distance correction ratio with respect to the RTK coordinates obtained by performing RTK positioning vertically above the pile core position ; An error between the target coordinates of the pile core on the design drawing data corresponding to the pile core coordinates converted into the coordinates on the design drawing data of the pile core covered with the special marker and the target coordinates is calculated. ,system. The investigation equipment is installed around the inspection target position covered with the special marker, and when the image of the special marker is recognized through the 3D imaging means of the investigation equipment, the image is based on the recognized image. 2. The system of claim 1, wherein the pile core position is identified. The dedicated marker is an umbrella shape covering the RTK positioning target point in the field,
At the center of the dedicated marker, a peephole is provided for confirming the center position of the pile core, and it is colored matte blue to improve the accuracy of image recognition on the ground of the construction site. 2. The system of claim 1, wherein:

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