KR102320523B1 - Geodetic surveying system for acquiring high-precision coordinate by rtk control surveying of gps - Google Patents

Abstract

The present invention relates to a geodetic surveying system, and more specifically, to a geodetic surveying system for acquiring high-precision coordinates in real time by the RTK control surveying of a GPS, comprising: a GPS receiving part for a reference station placed on a surveying ground serving as a reference point to receive the current position and time from a GPS satellite and to configure a RTK reference position; a communication model part placed between the GPS receiving part for a reference station and a GPS receiving part for a mobile station to transmit error correction information between the GPS receiving part for a reference station and the GPS receiving part for a mobile station; and the GPS receiving part for a mobile station placed on a surveying ground to be surveyed and receiving the current position and time from the GPS satellite to configure a RTK surveying position, wherein an elevation point, a triangular irregular network (TIN) and a contour line can be generated using GPS RTK, thereby deriving an on-site surveying result immediately on the site in a short time.

Description

A geodetic surveying system that can acquire high-precision coordinates in real time through RTK control surveying of GPS

The present invention relates to a geodetic surveying system, and more particularly, to a geodetic surveying system capable of acquiring high-precision coordinates in real time through GPS RTK control surveying.

In general, for public surveys and underground facility surveys ordered by public institutions such as the state, geodetic surveys should be performed first. Geodetic surveying refers to all activities of measuring horizontal distance, elevation difference, and direction, determining the position of each measurement point, displaying it in drawings or numerical values, and staking out on-site.

GPS surveying is a survey performed using a Global Positioning System (GPS) instrument, and refers to the operation of determining the geodesic coordinates and elevation by obtaining the three-dimensional relative position between observation points.

In addition, RTK (Real-Time Kinematic) control surveying or RTK GPS surveying can be said to calculate the position after correcting the pseudorange by wirelessly transmitting the correction value of the reference station to the mobile station or mobile surveying device.

This RTK survey has the advantage of being able to use the observation results immediately in the field, so that the location of the reference point can be confirmed and the numerical topographic map can be modified through the coordinate values obtained in real time.

Conventionally, when performing a GPS survey, it is difficult to perform an accurate GPS survey when the place for installing the GPS surveying device is narrow or it is difficult to install the GPS surveying device at an accurate location.

Therefore, although precise GPS surveying is performed using RTK, there is a need to develop a technology that can perform accurate GPS surveying in various places. It is required to acquire a location using

In addition, in the case of surveying using the existing GPS surveying device, when there are rough terrain conditions and topographical features such as trees and rocks, it is difficult to survey. There are problems in that it is difficult to obtain precise coordinates and it takes a long time to derive field survey results.

The matters described as the background art above are only for improving understanding of the background of the present invention, and should not be taken as an acknowledgment that they correspond to the prior art already known to those of ordinary skill in the art.

The present invention is to solve the problems of the prior art described above, and to provide a geodetic surveying system capable of acquiring high-precision coordinates in real time through RTK control surveying of GPS that can be applied to surveying through RTK controlled surveying. There is this.

In addition, the present invention can generate elevation points, Triangular Irregular Network (TIN), and contour lines using GPS RTK, so high-precision coordinates can be generated in real time through RTK control surveying of GPS, which can derive on-site survey results in a short time. Another object is to provide an achievable geodetic survey system.

The technical problems to be achieved by the present invention are not limited to the technical problems mentioned above, and other technical problems not mentioned will be clearly understood by those of ordinary skill in the art from the description of the present invention. .

The configuration of the present invention for achieving the above object is located on the survey ground serving as the reference point, receives the current position and time from the GPS satellite, sets the RTK reference position, and error correction information generated at every moment with raw data a GPS receiver for a reference station that generates a RTCM (Radio Technical Commission for Maritime Services) format and transmits it to the GPS receiver for a mobile station in real time; a communication modem unit positioned between the GPS receiver for the reference station and the GPS receiver for the mobile station to transmit error correction information between the GPS receiver for the reference station and the GPS receiver for the mobile station; And it is located on the ground to be surveyed, receives the current position and time from the GPS satellite, sets the RTK survey position, and receives the survey data and error correction information of the GPS receiver for the reference station through the communication modem, and receives the data from the GPS receiver for the reference station. a GPS receiver for a mobile station that acquires coordinates by performing real-time relative positioning; It is characterized in that it includes.

In the geodetic surveying system capable of acquiring high-precision coordinates in real time through RTK control surveying of GPS according to an embodiment of the present invention, the GPS receiver for the mobile station includes: a horizontal adjustment unit coupled to the upper part of the vehicle; a landing platform coupled to the upper part of the horizontal adjustment unit; a buffer mechanism coupled to the upper portion of the landing platform; a rotation mechanism coupled to the upper portion of the buffer mechanism; Elevating unit coupled to the upper portion of the rotating mechanism; and a GPS receiver for a mobile station coupled to an upper portion of the lift unit. It is preferable to include

In a geodetic surveying system capable of acquiring high-precision coordinates in real time through RTK control surveying of GPS according to an embodiment of the present invention, the horizontal adjustment unit includes: a cylindrical height case with an empty interior; a height rod that is accommodated in the height case so as to be slidable up and down and has a plurality of fixing grooves formed on the side thereof; And it is coupled to the upper end of the height case, the height and lowering part having a fixing rod that can enter into a plurality of fixing grooves; Including, the height and the fixed part, the fixed case coupled to the upper end of the height case; a fixed rod which is accommodated in the fixed case to be slidable from side to side and whose ends can enter the plurality of fixing grooves; a fixing spring accommodated in the fixing case and connecting between the right end of the fixing rod and the inner right end of the fixing case; and a fixed limiting unit mounted on the upper portion of the fixed case and capable of restricting the movement of the fixed rod; It includes, wherein the fixed limiting portion, a limiting plate coupled to the upper surface of the fixed case portion; a pair of limiting springs coupled to the top of the limiting plate; Ring-shaped limiting moving part connected to the lower end of the limiting spring; and a limiting rod coupled to the lower end of the limiting moving part; It is preferable to include

In a geodetic surveying system capable of acquiring high-precision coordinates in real time through RTK control surveying of GPS according to an embodiment of the present invention, the rotating mechanism includes: a horizontal rotating unit coupled to the lower end of the elevating unit to enable the elevating unit to rotate; and a rotation control unit mounted on a lower end of the horizontal rotation unit; It includes, wherein the horizontal rotating unit is coupled to the lower end of the elevating unit, the rotating case is formed in an empty cylindrical shape with an open upper end and a rear end; a rotating rod accommodated in the rotating case, the upper end being coupled to the lower end of the table chuck, and the lower end passing through the lower end of the rotating case and being accommodated in the rotating control unit; a rotation extension plate protruding from the side of the rotation rod; a rotation stopper formed on the upper end of the rotation case and in contact with the upper surface of the rotation extension plate; and a plurality of rotating balls disposed between the lower surface of the rotating extension plate and the inner lower surface of the rotating case; Including, wherein the rotation control unit is coupled to the lower end of the rotating case portion, the control case in which the lower end of the rotating rod is accommodated; a control rod accommodated in the control case and movable in a direction perpendicular to the rotation rod; a stop portion coupled to one end of the control rod and capable of being inserted into any one of a plurality of stop grooves formed under the rotating rod; a control spring coupled between the stopper and the inner surface of the rotating case; a prevention portion coupled to the other end of the control rod and capable of being inserted into the prevention groove formed on the side of the control case; a control moving unit coupled to one side of the prevention unit and having a triangular cross section; a control moving case coupled to the side of the control case and inserted so that the control moving part can move left and right; and a control handle coupled to the upper part of the control moving case so as to be movable up and down, and the lower end of which is in contact with the upper surface of the control moving part. It is preferable to include

In a geodetic surveying system capable of acquiring high-precision coordinates in real time through RTK control surveying of GPS according to an embodiment of the present invention, the lifting unit includes: a lifting drive unit coupled to an upper portion of a rotating mechanism; a spherical elevating housing coupled to the upper part of the elevating drive and having an empty interior; an elevating shaft connected to the elevating drive unit, rotating clockwise or counterclockwise, elevating up and down, and disposed inside the elevating housing; A plurality of lifting support body hinged to the outer wall of the lifting shaft; a support bar mounted to be drawn out at the ends of the plurality of lifting support bodies; a support roller provided at the end of the support bar and supported on the inner wall of the elevating housing; an elevating spring having one side coupled to the inside of the elevating support body and the other side coupled to the support bar to elastically support the support bar; and a connection spring connecting the plurality of lifting support bodies to each other so that the plurality of lifting support bodies can be supported. And, it is preferable that the lifting support body, the support bar, and the support roller are lifted while rotating together with the lifting shaft when the lifting driving unit is operated, and the support roller is in rolling contact with the inner wall of the lifting housing.

The present invention having the above configuration can acquire high-precision coordinates in real time, and can generate elevation points, TIN (Triangular Irregular Network), and contour lines using GPS RTK, so that it can be directly It has the effect of deriving field survey results.

1 is a diagram schematically illustrating each configuration of a geodetic surveying system capable of acquiring high-precision coordinates in real time through RTK control surveying of GPS according to an embodiment of the present invention;
2 is a block diagram showing the configuration of a GPS receiver for a reference station according to an embodiment of the present invention.
3 is a block diagram showing the configuration of a GPS receiver for a mobile station according to an embodiment of the present invention.
4 is a block diagram showing the configuration of an RTK control unit according to an embodiment of the present invention.
5 is a flowchart illustrating a survey method to which a geodetic surveying system capable of acquiring high-precision coordinates in real time through RTK control surveying of GPS according to an embodiment of the present invention is applied.
6 is a diagram schematically illustrating a state in which a GPS receiver for a mobile station is installed on an upper portion of a vehicle according to an embodiment of the present invention;
7 is a view showing a cross-sectional view of a horizontal adjustment unit according to an embodiment of the present invention.
8 is a view showing a cross-sectional view of a buffer mechanism according to an embodiment of the present invention.
9 is a view showing a cross-sectional view of a rotating mechanism according to an embodiment of the present invention.
10 is a view showing a state of a rotating rod according to an embodiment of the present invention.
11 is a view showing a cross-sectional view of a lifting unit according to an embodiment of the present invention.

Hereinafter, based on the accompanying drawings, the present invention will be described in detail so that those of ordinary skill in the art can easily carry out the present invention. However, the present invention may be embodied in many different forms and is not limited to the embodiments described herein.

In order to clearly explain the present invention, parts irrelevant to the description are omitted, and the same reference numerals are given to the same or similar elements throughout the specification.

In addition, the terms or words used in the present specification and claims should not be construed as being limited to their ordinary or dictionary meanings, and the inventor should properly understand the concept of the term in order to best describe his invention. Based on the principle that it can be defined, it should be interpreted as meaning and concept consistent with the technical idea of the present invention.

1 is a diagram schematically illustrating each configuration of a geodetic surveying system capable of acquiring high-precision coordinates in real time through RTK control surveying of GPS according to an embodiment of the present invention, and FIG. 2 is an embodiment of the present invention. It is a block diagram showing the configuration of a GPS receiver for a reference station according to an embodiment of the present invention, FIG. 3 is a block diagram showing the configuration of a GPS receiver for a mobile station according to an embodiment of the present invention, and FIG. It is a block diagram showing the configuration of the RTK control unit.

As shown, the geodetic surveying system capable of acquiring high-precision coordinates in real time through RTK control surveying of GPS according to the present invention includes a GPS receiver 110 for a reference station, a communication modem 120, and a GPS receiver 130 for a mobile station. ) is composed of

The GPS receiver 110 for the reference station is located on the survey ground serving as the reference point, receives the current position and time from the GPS satellite, sets the RTK reference position, and transmits the raw data and error correction information generated every moment to the RTCM (Radio Radio). Technical Commission for Maritime Services) format is generated and transmitted in real time to the GPS receiver 130 for a mobile station, which is an RTCM message generating receiver 111, an antenna 112 for receiving the first L1/L2 carrier wave, and Don Margolin ( Dorne-margolin) module 113 .

The RTCM message generating receiver 111 is configured to acquire a 12-channel dual frequency signal and generate an RTCM message as an RTK reference station.

The first L1/L2 carrier reception antenna 112 has a choke ring shape on the upper end of a triangular support located on one side of the RTCM message generating receiver, and serves to receive the current location and time from the GPS satellite.

Here, L1 refers to the position of the GPS receiver for the reference station, and L2 refers to the position of the GPS receiver for the mobile station.

In addition, the first L1/L2 carrier reception antenna according to the present invention is configured by the L1/L2 RTK method using both the L1 and L2 pseudoranges and the carrier phase.

As described above, since the first L1/L2 carrier reception antenna according to the present invention is configured in the L1/L2 RTK scheme, the current position can be accurately set, thereby improving the accuracy of coordinates.

The Done-margolin module 113 serves to improve signal acquisition on the central axis of the L1/L2 carrier reception antenna.

The communication modem unit 120 is located between the GPS receiver 110 for the reference station and the GPS receiver 130 for the mobile station, and transmits error correction information between the GPS receiver for the reference station and the GPS receiver for the mobile station in a LAN communication method, radio wave transmission/reception method , it plays a role of selecting and transmitting any one of the mobile phone packet methods.

It consists of a first communication modem of a LAN communication method, a second communication modem of a radio wave transmission/reception method, and a third communication modem of a mobile phone packet method.

The GPS receiver 130 for the mobile station is located on the survey ground to be surveyed, receives the current location and time from the GPS satellite, sets the RTK survey location, and uses the communication modem to set the survey data and error correction information of the GPS receiver for the reference station. It serves to acquire precise coordinates by receiving and performing real-time relative positioning with the data of the GPS receiver for the reference station, which includes the coordinate data receiver 131, the second L1/L2 carrier antenna 132, and the pinwheel. It is composed of a module 133 and an RTK control unit 134 .

And, when the GPS receiver 130 for a mobile station according to the present invention moves the antenna for receiving the second L1/L2 carrier wave in real time while measuring, a method using a bag, a method using a pole, a method of moving through an antenna of a vehicle Select any one and measure while moving.

As will be described in detail later, the GPS receiver 130 for the mobile station includes a horizontal adjustment unit 300 coupled to an upper portion of the vehicle V, a landing platform 400 coupled to an upper portion of the horizontal adjustment unit 300, The buffer mechanism 200 coupled to the upper portion of the landing platform 400, the rotary mechanism 500 coupled to the upper portion of the buffer mechanism 200, the lifting unit 600 and the lifting unit coupled to the upper portion of the rotary mechanism 500 It is made to include a GPS receiver 130 for a mobile station coupled to the upper portion of the (600).

A detailed configuration of the horizontal adjustment unit 300 , the landing platform 400 , the buffer mechanism 200 , the rotation mechanism 500 , and the lifting unit 600 will be described in detail below.

The coordinate data receiver 131 is a 12-channel dual frequency signal acquisition and RTK mobile station, which acquires up to 20 coordinates per second, outputs data externally through RS-232 serial communication, and receives data through CF (Compact Flash) memory. serves to store.

The second L1/L2 carrier reception antenna 132 is located at one side of the coordinate data receiver and serves to receive the current position and time from the GPS satellite.

The pinwheel module 133 serves to improve signal acquisition on the central axis of the antenna for receiving the second L1/L2 carrier wave.

The RTK control unit 134 is located on the other side of the coordinate data receiver, and serves to acquire precise coordinates by performing real-time relative positioning through the measurement data and error correction information of the GPS receiver for the reference station.

This includes an NMEA data processing unit 134a that converts the data measured by the RTK method into an NMEA data format therein.

The NMEA data processing unit 134a converts the NMEA data composed of comma-separated text into a database file (*mdb) on the MS Access program, then converts it into a shape file (*.shp: ArcInfoshape) in the ArcCatalog program, and converts it The converted shape file is converted into a layer format in the ArcMap program, and it plays a role in filtering out values that are high in DOP and outliers that are visually distinguished among the database attribute information.

Here, NMEA (National Marine Electronics Association) is a standard protocol used when a GPS receiver transmits data. Most of the data is transmitted through RS-232 serial communication, and all data is composed of ASIC II codes.

That is, not raw data, but data in a form that is primarily processed inside the GPS receiver for a mobile station and can be used immediately by a user is included.

In addition, the RTK control unit 134 according to the present invention first forms an elevation point graph through the measurement data, calculates the distance between the reference station point and the mobile station point through the ArcMap distance measurement unit 134b, and then the entire route TIN is generated using the 3D analyst toolbox unit 134c for the longitudinal cross-sectional view of , and RGB colors are applied to the TIN through the contour line processing unit 134d to generate contour lines.

As described above, the RTK control unit according to the present invention includes the NMEA data processing unit 134a, the ArcMap distance measurement unit 134b, the 3D analyst toolbox unit 134c, and the contour line processing unit 134d. It is stored in the internal flash memory of the receiver and simultaneously outputs the data to PDA (Personal Digital Assistants) in real time through the RS-232 format serial cable, enabling field surveying while monitoring through the PDA screen.

5 is a flowchart illustrating a survey method to which a geodetic surveying system capable of acquiring high-precision coordinates in real time through RTK control surveying of GPS according to an embodiment of the present invention is applied.

First, the GPS receiver for the reference station is located on the survey ground serving as the reference point, receives the current position and time from the GPS satellite, and sets the RTK reference position (S100).

Next, the GPS receiver for the reference station generates raw data and error correction information generated at every moment in the RTCM (Radio Technical Commission for Maritime Services) format, and then transmits it in real time to the GPS receiver for the mobile station through the communication modem (S200) .

Next, the GPS receiver for the mobile station is positioned on the ground to be surveyed and receives the current location and time from the GPS satellite to set the RTK survey location (S300).

Then, the GPS receiver for the mobile station receives the measurement data and the error correction information of the GPS receiver for the reference station through the communication modem, and performs real-time relative positioning with the data of the GPS receiver for the reference station to obtain precise coordinates (S400).

Then, the elevation point graph is first formed through the precise coordinates obtained from the RTK control unit, the longitudinal section of the route is generated secondarily as TIN through the 3D analyst toolbox unit, and the contour line is 3rdly formed by applying RGB color to the TIN through the contour line processing unit generated (S500).

6 is a diagram schematically illustrating a state in which a GPS receiver for a mobile station is installed on an upper portion of a vehicle according to an embodiment of the present invention, and FIG. 7 is a view showing a cross-sectional view of a leveling unit according to an embodiment of the present invention am.

As shown, the horizontal adjustment unit 300 is coupled to the upper portion of the vehicle V, the landing platform 400 is coupled to the upper portion of the horizontal adjustment unit 300 , and a buffer mechanism is provided on the upper portion of the landing platform 400 . 200 is coupled, the rotary mechanism 500 is coupled to the upper portion of the buffer mechanism 200 , the lifting unit 600 is coupled to the upper portion of the rotary mechanism 500 , and the mobile station is disposed on the upper portion of the lifting unit 600 . For GPS receiver 130 is coupled.

In the illustrated embodiment, only one leveling unit 300 is shown, but only one is expressed for convenience to show a side view, and a pair of left and right pairs are installed on the upper part of the vehicle V to receive a GPS receiver for a mobile station ( 130) to be horizontal.

The horizontal adjustment unit 300 is accommodated so as to be slidable up and down in the cylindrical height case 310 and the height case 310 with an empty interior, and a height rod 320 in which a plurality of fixing grooves 321 are formed on the side surface. ) and the height and lowering part 330 coupled to the upper end of the case 310 and having a fixed rod 332 capable of entering into a plurality of fixing grooves 321 .

The height case 310 is placed on the upper surface of the vehicle V, and the height spring 311 is accommodated therein. The height spring 311 connects between the lower end of the height rod 320 and the inner lower end of the height case 310, and provides an elastic force so that the height rod 320 can move upward.

The height rod 320 is coupled to the height case 310 so as to be movable up and down, and the height of the landing platform 400 coupled to the upper portion may be varied according to the vertical movement of the height rod 320, Accordingly, the landing platform 400 can be adjusted horizontally.

The height fixing part 330 is accommodated in a fixed case 331 coupled to the upper end of the height case 310 and slidably left and right in the fixed case 331, and the ends enter a plurality of fixing grooves 321. A fixed rod 332 that can be accommodated in the inside of the fixed case 331 and connected between the right end of the fixed rod 332 and the inner right end of the fixed case 331, the fixed spring 333 and the fixed case 331 It is mounted on the upper portion and comprises a fixing limiting portion 334 that can limit the movement of the fixing rod (332).

The fixing case 331 has an empty inside, and can accommodate the fixing rod 332 . A limiting hole 331a is formed in the upper surface of the fixing case 331 so that a limiting rod 338 of a fixing limiting part 334 to be described later can enter.

The fixing rod 332 is coupled to the fixing case 331 so as to be movable from side to side, and the end of the fixing rod 332 is formed in a wedge shape. Since the end of the fixing rod 332 is formed in a wedge shape, the fixing rod 332 can ride over the plurality of fixing grooves 321 formed in the height rod 320 .

That is, when the height rod 320 moves up and down, the fixed rod 332 moves to the left in the portion where the fixing groove 321 is located, and in the portion where the fixing groove 321 is not located, the height of the rod 320 It comes into contact with the outer surface and moves to the right.

The fixing rod 332 can be moved to the left and right by the fixing spring 333 and then return to its original position. A rod groove 332a is formed on the upper surface of the fixing rod 332 at a position corresponding to the limiting hole 331a of the fixing case 331 . This rod groove 332a can also enter the limiting rod 338 of the fixing limiting part 334 to be described later.

The fixing limiting part 334 includes a limiting plate 335 coupled to the upper surface of the fixing case 331 , a pair of limiting springs 336 coupled to the upper end of the limiting plate 335 , and a limiting spring 336 . It is made including a limiting rod 338 coupled to the lower end of the ring-shaped limiting moving part 337 and the limiting moving part 337 connected to the lower end of the.

The pair of limiting springs 336 apply elastic force so that the limiting moving part 337 and the limiting rod 338 can be moved downward. The limiting rod 338 may enter the limiting hole 331a of the fixing case 331 and the rod groove 332a of the fixing rod 332 .

Looking at the horizontal adjustment process of the horizontal adjustment unit 300 according to the present invention, first, the limiting movement unit 337 overcomes the elastic force of the pair of limiting springs 336 and is moved upward. According to the movement of the limiting moving part 337, the limiting rod 338 is also separated from the limiting hole 331a and the rod groove 332a, and the fixed rod 332 can freely move left and right.

Next, by sliding the height rod 320 up and down to determine the degree to which the height rod 320 is inserted into the height case 310 . At this time, the height spring 311 provides an elastic force so that the height rod 320 can move upward.

When the height rod 320 is moved up and down, the fixing rod 332 can ride over the plurality of fixing grooves 321, and it moves to the left in the part where the fixing groove 321 is located, and the fixing groove 321. In a portion not located in this position, it comes into contact with the outer surface of the height rod 320 and moves to the right.

When the height of the lifting rod 320 is determined, the limiting moving part 337 is placed so that the limiting rod 338 is moved downward by the elastic force of the limiting spring 336, and the lower end of the limiting rod 338 is limited It is inserted into the hole 331a and the rod groove 332a to prevent the fixing rod 332 from moving any more.

Accordingly, the landing platform 400 does not move up and down any more and the height is fixed, and the height of the plurality of horizontal adjustment units 300 can be adjusted to keep the landing platform 400 horizontal.

8 is a view showing a cross-sectional view of a buffer mechanism according to an embodiment of the present invention.

As shown, the buffer mechanism 200 includes a buffer rod 210, a buffer case 220, a buffer stopper 230, a buffer connection part 240 and a buffer bending part 250, and a rotation mechanism ( 500) is mounted at the bottom.

The buffer rod 210 is coupled to the lower end of the rotating mechanism 500, and the buffer fastening part 211 in the form of a disk and the buffering cylindrical part 212 in the form of a cylinder extending in the lower center of the buffer fastening part 211. is done

The buffer case 220 is formed in an empty cylindrical shape, the lower end of the buffer rod 210 is accommodated. The landing platform 400 is coupled to the lower end of the buffer case 220 .

The buffer stopper 230 is coupled to the lower outer surface of the buffer cylinder portion 212 of the buffer rod (210). The buffer stopper 230 is formed in a ring shape, and is disposed inside the buffer case 220 . When a large vibration or shock is applied from the ground and the buffer rod 210 is greatly shaken, the buffer stopper 230 is in contact with the inner surface of the buffer case 220 to perform large displacement control. A predetermined gap (G) is formed between the outer surface of the buffer stopper 230 and the inner surface of the buffer case 220 .

The buffer connection part 240 is coupled to the lower portion of the buffer rod 210 and connects between the buffer rod 210 and the inner surface of the buffer case 220 . The buffer stopper 230 and the buffer connection part 240 are made of a rubber material.

The buffer connection part 240 extends to the side of the buffer upper and lower part 241 and the buffer upper and lower part 241 connecting the lower end of the buffer rod 210 and the inner lower surface of the buffer case 220 up and down to extend the buffer case 220 ) includes a buffer left and right portions 242 for connecting left and right between the inner side surfaces. The buffer connection part 240 has a 'ten (十)'-shaped cross-section as a whole.

Between the outer surface of the buffer stopper 230 and the inner surface of the buffer case 220, that is, the gap (G) is coupled to the buffer bending portion 250 to connect the buffer stopper 230 and the buffer case 220 with each other. .

Specifically, the buffer bending portion 250 is made including a first curved portion 251, a second curved portion 252, a third curved portion 253, a fourth curved portion 254, and a fifth curved portion 255, and as a whole It has a 'zigzag' cross section.

The first curved part 251 is coupled to the outer surface of the buffer stopper 230 and is formed in a single shape. The second curved portion 252 extends obliquely upward from the lower end of the first curved portion 251 . The third curved part 253 extends downward from the upper end of the second curved part 252 and is formed in a single shape. The fourth curved portion 254 extends obliquely upward from the lower end of the third curved portion 253 . The fifth curved portion 255 extends downward from the upper end of the fourth curved portion 254 , is formed in a shape of a figure, and is coupled to the inner surface of the buffer case 220 .

At this time, the vertical height of the first curved part 251 is formed to be relatively higher than the vertical height of the third curved part 253 , and the vertical height of the third curved part 253 is relatively higher than the vertical height of the fifth curved part 255 . is formed That is, the overall height of the buffer curved portion 250 is gradually lowered from the first curved portion 251 toward the fifth curved portion 255 in the direction.

In addition, the thickness of the first curved portion 251 to the fifth curved portion 255 is preferably formed to be the same overall. An angle between the first curved part 251 and the second curved part 252 , an angle between the second curved part 252 and the third curved part 253 , and an angle between the third curved part 253 and the fourth curved part 254 . and the angle between the fourth curved portion 254 and the fifth curved portion 255 is preferably set to be substantially the same overall.

In this way, the present invention can obtain the effect of substantially reducing the gap by using the buffer bending part 250 while maintaining the physical gap (G) between the buffer stopper 230 and the buffer case 220 as it is, the buffer While reducing noise due to frequent contact of the stopper 230 , there is an advantageous characteristic for controlling large displacement vibrations.

9 is a view showing a cross-sectional view of the rotating mechanism according to an embodiment of the present invention, Figure 10 is a view showing the state of the rotating rod according to an embodiment of the present invention.

As shown, the rotating mechanism 500 is coupled to the lower end of the elevating unit 600 and a horizontal rotating unit ( 510) and a rotation control unit 520 mounted on the lower end of the horizontal rotation unit 510.

The horizontal rotating unit 510 is coupled to the lower end of the elevating unit 600 and is accommodated in the rotating case 511, which is formed in a cylindrical shape with an open top and a rear end, and the rotating case 511, and has an upper end for lifting and lowering. A rotating rod 512 coupled to the lower end of the unit 600 and accommodated in the rotation control unit 520 through the lower end of the lower end of the rotating case 511, a rotating extension plate extending protruding from the side of the rotating rod 512 ( 513), formed on the upper end of the rotating case 511, the rotation stopping part 511a in contact with the upper surface of the rotating extension plate 513, the lower surface of the rotating extension plate 513, and the inner lower part of the rotating case 511 It includes a plurality of rotating balls 514 disposed between the faces.

The rotating rod 512 is capable of horizontal rotation relative to the rotating case 511 and other parts, and accordingly, the lifting unit 600 and the mobile station GPS receiver 130 coupled to the upper end of the rotating rod 512 are also Horizontal rotation is possible.

The rotation rod 512 is formed in a cylindrical shape as a whole, and a rotation extension plate 513 protrudes and extends outwardly in the form of a ring on the side of the rotation rod 512 . The rotation extension plate 513 is in contact with the rotation stopper 511a.

The plurality of rotating balls 514 are accommodated in the rotating case 511, and when the rotating rod 512 rotates horizontally, the frictional force between the rotating case 511 and the rotating rod 512 is reduced to reduce the rotating rod 512. ) to rotate more smoothly.

As described above, in the present invention, since the direction of the GPS receiver 130 for a mobile station can be switched as it is in a standing state by coupling the GPS receiver 130 for a mobile station to the landing platform 400, the location of the GPS receiver 130 for a mobile station is There is an advantage in that measurement errors due to fluctuations can be reliably excluded.

The rotation control unit 520 is mounted on the lower end of the horizontal rotation unit 510, the control case 521, the control rod 522, the stopper 523, the control spring 524, the prevention unit 525, the control moving unit 526 , including a control transfer case 527 and a control handle 528 .

The control case 521 is formed in a cylindrical shape with an empty interior, and is coupled to the lower end of the rotation case 511 . A hole is formed at the upper end of the control case 521 to communicate with the rotating case 511 , and the lower end of the rotating rod 512 may be accommodated in the control case 521 through this hole.

The control rod 522 is accommodated in the J case, and is movable in a direction perpendicular to the rotation rod 512 (ie, left and right). A stop part 523 is coupled to the right end of the control rod 522 , and the prevention part 525 is coupled to the left end of the control rod 522 .

The stop 523 is formed in a flat plate shape, and is movable left and right according to the left and right movement of the control rod 522 . A plurality of stop grooves 512a are radially formed in the lower portion of the rotary rod 512, and the stop portion 523 may be inserted into any one of these stop grooves 512a.

When the control rod 522 is moved to the left, the stop 523 is inserted and accommodated in the stop groove 512a of the rotary rod 512, and when the control rod 522 is moved to the right, the stop 523 is separated from the stop groove (512a) of the rotating rod (512).

When the stop portion 523 is inserted into the stop groove 512a of the rotation rod 512, the rotation rod 512 is blocked by the stop portion 523 and cannot rotate any more and is fixed in place. When the stop portion 523 is separated from the stop groove 512a of the rotary rod 512, the rotary rod 512 is horizontally rotatable again.

As shown, a plurality of stop projections 512b may protrude from the stop groove 512a of the rotary rod 512 . The plurality of stopping protrusions 512b are made of an elastic material such as rubber, and are arranged at predetermined intervals along the longitudinal direction of the stopping grooves 512a.

In addition, it is preferable that the plurality of stopping protrusions 512b are arranged in a zigzag shape so that a predetermined height difference between the facing stopping protrusions 512b can be set. That is, the plurality of stopping protrusions 512b are arranged alternately with each other, like interlocked hands.

The plurality of stop projections 512b is not easily separated from the stop groove 512a when the stop portion 523 is inserted into the stop groove 512a of the rotary rod 512 and is maintained therein. functions that enable it.

The control spring 524 is coupled between the stop 523 and the inner surface of the rotating case 511 . The control spring 524 provides an elastic force to push the control rod 522 and the stopper 523 to the left.

The prevention part 525 may be inserted into the prevention groove 521a formed on the side of the control case 521 . When the control rod 522 is moved to the left, the prevention part 525 is inserted into the prevention groove 521a, and when the control rod 522 is moved to the right, the prevention part 525 is separated from the prevention groove 521a. do.

The outer surface of the prevention part 525 and the inner surface of the prevention groove 521a are formed in a sawtooth shape. When the prevention part 525 is inserted into the prevention groove 521a, the control rod 522 and the stop part 523 cannot rotate the shaft and move up and down, and thus the fixed state of the rotation rod 512 is fixed. You can keep it more robust.

The control moving part 526 is coupled to the left end of the prevention part 525 and has a triangular cross section. The control moving case 527 is coupled to the side of the control case 521 and the control moving unit 526 is inserted so as to be movable left and right. In other words, the control moving unit 526 may be accommodated in the control moving case 527 and move left and right.

The control handle 528 is coupled to the upper portion of the control transfer case 527 . The control handle 528 is mounted to be movable up and down, and the lower end of the control handle 528 is in contact with the upper surface of the control moving part 526 .

When the user holds the control handle 528 and applies a downward force, the lower end of the control handle 528 is in contact with the upper surface of the control moving unit 526 and pushes the control moving unit 526, and accordingly, the control moving unit 526 is shifted to the right.

As the control moving part 526 is moved to the right, the prevention part 525 is separated from the prevention groove 521a, and the control rod 522 overcomes the elastic force of the control spring 524 and is moved to the right.

As the control rod 522 is moved to the right, the stopping part 523 is also separated from the stopping groove 512a, and the rotating rod 512 and the GPS receiver 130 for a mobile station coupled thereto are provided with a stopping part ( 523), it can be freely rotated horizontally.

When the horizontal rotation of the GPS receiver 130 for the mobile station is finished in the direction desired by the user, the user releases the control handle 528, and the control rod 522 moves to the left according to the elastic force of the control spring 524.

When the control rod 522 moves to the left, the stop 523 is inserted into the stop groove 512a to limit horizontal rotation of the rotary rod 512 . At this time, the prevention part 525 is inserted into the prevention groove 521a, and the control moving part 526 moves to the left to lift the control handle 528 upward.

11 is a view showing a cross-sectional view of a lifting unit according to an embodiment of the present invention.

As shown, the lifting unit 600 is coupled to the upper portion of the rotating mechanism 500 , and the GPS receiver 130 for the mobile station is coupled to the upper portion of the lifting unit 600 . The GPS receiver 130 for the mobile station can move up and down by the lifting unit 600 .

The elevating unit 600 includes an elevating driving unit 610 , an elevating housing 680 , a lifting shaft 620 , a plurality of lifting support bodies 630 , a support bar 640 , a support roller 650 , and a lifting spring 660 . ) and a connection spring (670).

The elevating driving unit 610 is mounted on the upper portion of the rotating mechanism 500, and is composed of a rotating motor, etc., to rotate the elevating shaft 620 in a clockwise or counterclockwise direction to elevate (raise or descend).

The elevating housing 680 is formed in a spherical shape with an empty interior, and is coupled to the upper portion of the elevating driving unit 610 . Inside the elevating housing 680, elevating shaft 620, elevating support body 630, support bar 640, support roller 650, elevating spring 660 and connection spring 670, etc. may be built-in. .

The elevating shaft 620 is connected to the upper portion of the elevating driving unit 610 and may be rotated in a clockwise or counterclockwise direction. A hole is formed at the lower end of the elevating housing 680 so that the elevating shaft 620 can pass therethrough, and the elevating shaft 620 passes through the hole and is connected to the elevating driving unit 610 . Also, a hole is formed at the upper end of the elevating housing 680 so that the elevating shaft 620 can pass therethrough, and the upper end of the elevating shaft 620 passes through this hole and is connected to the GPS receiver 130 for a mobile station.

The plurality of lifting support bodies 630 are hinged to the outer wall of the lifting shaft 620 . That is, the lifting support body 630 may rotate up and down based on a portion coupled to the lifting shaft 620 , and accordingly, the support bar 640 and the support roller 650 may also rotate up and down.

In the illustrated embodiment, a plurality of lifting support body 630 is composed of four, two are arranged on the upper side based on the portion where the lifting support body 630 is coupled to the lifting shaft 620, and two are arranged on the lower side. do.

The support bar 640 is mounted so as to be withdrawable at each end of the four lifting support bodies 630 . Since the support bar 640 is withdrawable, the total length from the end of the lifting support body 630 to the end of the support bar 640 may be increased or decreased.

Support rollers 650 are respectively mounted at the ends of the support bars 640 to be rotatable. The support roller 650 is in rolling contact with the inner wall of the elevating housing 680 and supports the support bar 640 .

One side of the lifting spring 660 is coupled to the inside of the lifting support body 630 , and the other side is coupled to the support bar 640 , and provides an elastic force to the support bar 640 . The support bar 640 by the elevating spring 660 tries to move toward the inner wall of the elevating housing 680 .

The connection spring 670 connects the four lifting support bodies 630 to each other, and allows a plurality of lifting support bodies 630 to be supported with each other. The connection spring 670 is composed of four.

Specifically, a connection spring 670 for connecting the lifting support body 630 disposed on the upper side with respect to the portion where the lifting support body 630 is coupled to the lifting shaft 620, and the lifting support body 630 are connected to the lifting shaft. A connection spring 670 that connects the lifting support body 630 disposed on the lower side with respect to the portion coupled to the 620, the lifting support body 630 is coupled to the lifting shaft 620, the left side based on the portion The connecting spring 670 and the lifting support body 630 for connecting the lifting support body 630 disposed on the It is composed of a connecting spring 670 that connects.

When the lifting driving unit 610 is operated, the lifting support body 630, the support bar 640, and the support roller 650 are rotated together with the lifting shaft 620 to be raised and lowered, and the support roller 650 is the lifting housing 680. ) in rolling contact with the inner wall.

Specifically, when the elevating shaft 620 is raised by the operation of the elevating driving unit 610, the elevating support body 630 is a pair of elevating support bodies disposed on the upper side based on the portion coupled to the elevating shaft 620 ( The support bar 640 coupled to each of the 630) overcomes the elastic force of the lifting spring 660 and moves to the inside of the lifting support body 630, and accordingly, the overall length of the lifting support body 630 and the support bar 640 is will decrease

In addition, when the lifting shaft 620 is raised by the operation of the lifting drive unit 610, a pair of lifting support body ( The support bar 640 coupled to each of the 630) moves to the outside of the lifting support body 630 by the elastic force of the lifting spring 660, and accordingly, the overall length of the lifting support body 630 and the support bar 640 is will increase

When the elevating shaft 620 is lowered by the operation of the elevating driving unit 610, a pair of elevating support bodies 630 are arranged on the upper side with respect to the portion where the elevating support body 630 is coupled to the elevating shaft 620. ) respectively coupled to the support bar 640 moves to the outside of the lifting support body 630 by the elastic force of the lifting spring 660, and accordingly, the overall length of the lifting support body 630 and the support bar 640 is increased. do.

In addition, when the lifting shaft 620 is lowered by the operation of the lifting drive unit 610, the lifting support body 630 is a pair of lifting support bodies disposed on the lower side based on the portion coupled to the lifting shaft 620 ( The support bar 640 coupled to each of the 630) overcomes the elastic force of the lifting spring 660 and moves to the inside of the lifting support body 630, and accordingly, the overall length of the lifting support body 630 and the support bar 640 is will decrease

As described above, in the present invention, the elevating shaft 620 is elevated according to the operation of the elevating driving unit 610 so that the lengths of the elevating support body 630 and the support bar 640 can be organically varied so that elevating can be performed stably. There are advantages.

In addition, when the lifting shaft 620 is raised and lowered, the four support rollers 650 support the elevating shaft 620 while rolling in contact with the inner wall of the elevating housing 680, so it is stable, and during the elevating of the elevating shaft 620, the elevating housing Even when an external shock is applied to the 680, the elevating spring 660 and the connecting spring 670 can absorb the shock while contracting or expanding, so it is stable.

The present invention described above is not limited by the above-described embodiments and the accompanying drawings, and it is common in the technical field to which the present invention pertains that various substitutions, modifications and changes can be made without departing from the technical spirit of the present invention. It will be clear to those who have the knowledge of

110: GPS receiver for reference station 120: communication modem unit
130: GPS receiver for mobile station 200: buffer mechanism
210: buffer rod 211: buffer fastening part
212: buffer cylinder 220: buffer case
230: buffer stopper 240: buffer connection part
241: buffer upper and lower parts 242: buffer left and right parts
250: buffer bent portion 251: first bent portion
252: second curved part 253: third curved part
254: fourth bent part 255: fifth bent part
300: horizontal adjustment unit 310: height case
311: high and low spring 320: high and low rod
321: fixed groove 330: high and low fixed
331: fixing case 331a: limiting hole
332: fixed rod 332a: rod groove
333: fixed spring 334: fixed limiting part
335: limit plate 336: limit spring
337: limited movement unit 338: limited load
400: landing platform 500: rotating mechanism
510: horizontal rotating unit 511: rotating case
511a: rotation stopper 512: rotation rod
512a: stop groove 512b: stop projection
513: rotation extension plate 514: rotation ball
520: rotation control unit 521: control case
521a: prevention groove 522: control rod
523: stop 524: control spring
525: prevention unit 526: control moving unit
527: control transfer case 528: control handle
600: elevating unit 610: elevating drive unit
620: lifting shaft 630: lifting support body
640: support bar 650: support roller
660: elevating spring 670: connecting spring
680: elevating housing

Claims (1)

It is located on the survey ground that becomes the reference point, receives the current position and time from the GPS satellite, sets the RTK reference position, and generates raw data and error correction information generated at every moment in RTCM (Radio Technical Commission for Maritime Services) format. a GPS receiver for a reference station for transmitting in real time to the GPS receiver for a mobile station;
a communication modem unit positioned between the GPS receiver for the reference station and the GPS receiver for the mobile station to transmit error correction information between the GPS receiver for the reference station and the GPS receiver for the mobile station; and
It is located on the ground to be surveyed, receives the current position and time from the GPS satellite, sets the RTK survey position, and receives the measurement data and error correction information of the GPS receiver for the reference station through the communication modem and converts it to the data of the GPS receiver for the reference station. GPS receiver for a mobile station to obtain coordinates by performing real-time relative positioning; including,
The GPS receiver for the mobile station,
a horizontal adjustment unit coupled to the upper portion of the vehicle; a landing platform coupled to the upper part of the horizontal adjustment unit; a buffer mechanism coupled to the upper portion of the landing platform; a rotation mechanism coupled to the upper portion of the buffer mechanism; Elevating unit coupled to the upper portion of the rotating mechanism; and a GPS receiver for a mobile station coupled to an upper portion of the lift unit. including,
The horizontal adjustment unit,
Cylindrical height case with an empty interior; a height rod that is accommodated in the height case so as to be slidable up and down and has a plurality of fixing grooves formed on the side thereof; And it is coupled to the upper end of the height case, the height and lowering part having a fixing rod that can enter into a plurality of fixing grooves; including,
The height and the government,
Fixed case coupled to the upper part of the height case; a fixed rod which is accommodated in the fixed case to be slidable from side to side and whose ends can enter the plurality of fixing grooves; a fixing spring accommodated in the fixing case and connecting between the right end of the fixing rod and the inner right end of the fixing case; and a fixed limiting unit mounted on the upper portion of the fixed case and capable of restricting the movement of the fixed rod; includes,
The fixing limiting part,
a limiting plate coupled to the upper surface of the fixed case; a pair of limiting springs coupled to the top of the limiting plate; Ring-shaped limiting moving part connected to the lower end of the limiting spring; and a limiting rod coupled to the lower end of the limiting moving part; including,
The rotating mechanism is
a horizontal rotating unit coupled to the lower end of the elevating unit to allow the elevating unit to rotate; and a rotation control unit mounted on a lower end of the horizontal rotation unit; includes,
The horizontal rotation unit,
a rotating case coupled to the lower end of the elevating unit and formed in a cylindrical shape with an open top and a rear end; a rotating rod accommodated in the rotating case, the upper end being coupled to the lower end of the table chuck, and the lower end passing through the lower end of the rotating case and being accommodated in the rotating control unit; a rotation extension plate protruding from the side of the rotation rod; a rotation stopper formed on the upper end of the rotation case and in contact with the upper surface of the rotation extension plate; and a plurality of rotating balls disposed between the lower surface of the rotating extension plate and the inner lower surface of the rotating case; including,
The rotation control unit,
a control case coupled to the lower end of the rotating case unit and accommodating the lower end of the rotating rod; a control rod accommodated in the control case and movable in a direction perpendicular to the rotation rod; a stop portion coupled to one end of the control rod and capable of being inserted into any one of a plurality of stop grooves formed under the rotating rod; a control spring coupled between the stopper and the inner surface of the rotating case; a prevention portion coupled to the other end of the control rod and capable of being inserted into the prevention groove formed on the side of the control case; a control moving unit coupled to one side of the prevention unit and having a triangular cross section; a control moving case coupled to the side of the control case and inserted so that the control moving part can move left and right; and a control handle coupled to the upper part of the control moving case so as to be movable up and down, and the lower end of which is in contact with the upper surface of the control moving part. includes,
The lifting unit,
Elevating drive unit coupled to the upper portion of the rotating mechanism; a spherical elevating housing coupled to the upper part of the elevating drive and having an empty interior; an elevating shaft connected to the elevating drive unit, rotating clockwise or counterclockwise, elevating up and down, and disposed inside the elevating housing; A plurality of lifting support body hinged to the outer wall of the lifting shaft; a support bar mounted to be drawn out at the ends of the plurality of lifting support bodies; a support roller provided at the end of the support bar and supported on the inner wall of the elevating housing; an elevating spring having one side coupled to the inside of the elevating support body and the other side coupled to the support bar to elastically support the support bar; and a connection spring connecting the plurality of lifting support bodies to each other so that the plurality of lifting support bodies can be supported. including,
When the elevating driving unit is operated, the elevating support body, the support bar and the support roller are rotated together with the elevating shaft to elevate and elevate, and the support roller is in rolling contact with the inner wall of the elevating housing. A geodetic survey system capable of obtaining coordinates.

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