KR101090976B1 - Verifying apparatus for a poition of an underground facility using a third position - Google Patents

Abstract

PURPOSE: A device for verifying the location of an underground facility using a third location is provided to verify integrity of a location on the ground without burying an underground facility, thereby drastically increasing reliability in information. CONSTITUTION: A plurality of ground indexes(10-1~10-n) is installed on a plurality of fixed spots when an underground facility is constructed. The ground indexes include base information, location information, and information about the underground facility. A plurality of reference point indexes(20-1~20-n) is installed in a fixed spot. A user terminal(30) obtains information from the ground indexes and the reference point indexes. The user terminal obtains the base information, location information, and information about the underground facility. A communications network(40) provides communication between the user terminal and a location information server(50).

Description

Verifying apparatus for a poition of an underground facility using a third position}

The present invention relates to a device for verifying the location of underground facilities using a third location, and more particularly, to measure a third point around a facility when constructing an underground facility. The information on the underground facility location using a third location that can be stored in a two-dimensional code or RFID tag installed on the ground indicator, and can be easily read from a portable terminal to verify the location of the underground facility will be.

Recently, with the activation of the Ubiquitous City project, the necessity for systematic and efficient management of various ground and underground facilities constituting the urban infrastructure is increasing.

Since the various services provided by U-City are closely related to the city's physical environment, that is, the location and condition of urban facilities, it is necessary to collect accurate facility-related information and maintain the normal condition of the facilities based thereon.

The spatial classification of various facilities that make up a city can be divided into ground and underground facilities. These facilities have significant differences in terms of functionality and management in addition to spatial differences.

On the functional side, ground facilities such as buildings, roads, bridges, etc., serve as the main activity spaces of residents, while geological facilities such as waterworks, sewers, electric lines, and communication lines are essential infrastructure necessary for the normal functioning of ground facilities. It is utilized as.

On the other hand, in terms of facility management, access to ground facilities is generally easy, while in the case of underground facilities, accessibility for installation, modification, repair, etc. is relatively low, so stable performance maintenance and rapid repair and recovery through real-time status monitoring are performed. This is required first.

Underground facilities have various types of accidents due to the physical characteristics of the installation environment called underground space, and it is not easy to predict, verify, repair, and replace such accidents.

In particular, since underground facilities are buried in a limited number of underground spaces, accidents caused by other works are likely to occur, and accidents related to these underground facilities can lead to large-scale casualties and property damage, so it is important to prevent accidents in advance.

Since underground facilities are buried underground, it is not easy to grasp the status of underground facilities after construction. Conventionally, as a method of examining the state of underground facilities, visual inspection, CCTV imaging equipment, and the inside of underground facilities were photographed, or mechanical measuring equipment was used, but these methods have many problems such as cost and accuracy.

Recently, a case of constructing a network of underground facilities by using a Geographic Information System (GIS) and a CAD program has been attempted when constructing an underground facility maintenance system.

However, the conventional underground facility maintenance system linked with the geographic information system is adapted to simultaneously change the network of the underground facility maintenance system when the geographic information system changes, so that it is expensive to maintain and update the system. There is a problem.

Until now, the management method of underground facilities is dependent on the drawings, and there are many problems in management because it is difficult to determine the status of underground facilities in the field. It is often the case that these underground facilities are damaged while digging ground with fork lanes in various civil works such as road works.

In case of damage of underground facilities, the living area of the area is paralyzed, or especially in the case of gas pipes, it can cause enormous property damage due to explosion and fire. In the event of a breakdown, rapid recovery is required, and a lot of effort and time are required during recovery. Existing drawing management methods are managed depending on the created drawings, so there is a problem that the actual construction status of the site may be inconsistent with the drawing.

In addition, dam water pipes and water pipes may be damaged due to floating ground or ground loads, but they cannot be easily found on the ground. Therefore, nowadays, a lot of manpower and equipment are put in place to perform the cumbersome management of monitoring with a leak detector.

Therefore, it is important to accurately locate underground facilities, but the existing analogue detection methods (sound detection, magnetic field detection, frequency detection, etc.) increase the false detection rate as the depth gets deeper, and the cost increases significantly, thus causing serious problems in security. I have it.

To solve this problem, digital detection techniques using positioning techniques such as GPS are emerging.

However, this digital technique has a disadvantage in that it is not possible to physically verify the location of the buried material after the covering after construction without the aid of the analog method. In particular, where ground or underground conditions change (usually disasters such as earthquakes), there is a need for means to verify this.

The present invention is to solve the above problems, an object of the present invention is to install an indicator that stores the information to be compared on the ground and the third position that can verify the location of the underground facilities using this indicator To provide a device for verifying the location of underground facilities using.

Another object of the present invention is to measure the third point around the facility at the time of construction of underground facilities, and stores the base information, location information, information of underground facilities buried nearby, etc. Third, which can verify the location of underground facilities by using the information of the third point by installing an indicator containing measurement information using a two-dimensional code or an electronic tag such as RFID that does not require any further action for maintenance. To provide a device for verifying the location of underground facilities using the location of.

The underground facility location verification apparatus using the third location of the present invention for achieving the above technical problem is installed on the ground of a number of points where the movement of the seat hardly occurs when constructing the underground facilities and the base information of the plurality of points, A plurality of ground indicators including location information and information of the underground facilities buried nearby; A plurality of reference point indicators installed at points where there is little possibility of movement; A user terminal acquiring information from the plurality of ground indicators and a plurality of reference point indicators to identify the base information, the location information, and the location information of the underground facilities buried nearby; A communication network providing communication between the user terminal and the location information server; Receiving the encryption code included in the plurality of ground indicators and the reference point indicators from the user terminal through the communication network configured to decode the information contained in the plurality of ground indicators and the reference point indicators to send back to the user terminal It is composed.

 According to an embodiment of the present invention, a plurality of ground indicators are characterized by being installed in a place where the movement is prominent and less noticeable to a person.

According to one embodiment of the present invention, the reference point indicator is characterized in that it is installed in the public institutions, landmark-level large buildings, special facilities, the installation point of the National Geographic Information Institute, which has little mobility.

According to an embodiment of the present invention, a plurality of ground indicators are characterized by storing base information, location information of the point and information of the underground facilities in a two-dimensional code or an electronic tag such as NFC-based RFID.

According to an embodiment of the present invention, the user terminal is a portable terminal widely used as a general telephone, a smart phone, a PDA, and a tablet PC.

According to an embodiment of the present invention, the user terminal is characterized in that the triangular surface formed by the three ground indicators or the underground facilities that enter the triangular surface formed by the two ground indicators and the reference point indicator is characterized in that the normal position.

According to an embodiment of the present invention, a pole is installed on the ground indicator to install a marker, and the ground indicator using a proportional expression based on the size of the marker photographed by photographing the marker with the camera of the user terminal at a reference point indicator close to the ground indicator. The distance between and the reference point index is calculated, and the direction is obtained by calculating the angle between the two points.

According to an embodiment of the present invention, the marker should be sized to be photographed by the camera of the user terminal even at a long distance and is characterized by having a simple shape and color while being distinguished from surrounding objects.

According to an embodiment of the present invention, the direction is obtained by using an electronic compass and a gyrometer embedded in the user terminal.

According to an embodiment of the present invention using the camera of the user terminal by calculating the distance between the ground indicator and the reference point indicator by calculating the tolerance range for each measured distance, the tolerance is different depending on the performance of the camera As it occurs, the tolerance is measured through an experiment.

According to an embodiment of the present invention, if the absolute coordinate of the ground indicator is within the tolerance range of the measured position coordinate, the position information of the ground indicator is stored in a storage space of the user terminal 30 and used as another reference point. It is characterized by.

According to an embodiment of the present invention, the ground indicators whose relative positions have been verified through the reference point indicators are used as new reference points, and the measurement is continued while verifying the ground indicators of another measurement point using the verified ground indicators as the reference point indicators. It is characterized by.

According to an embodiment of the present invention, only a region consisting of the three ground indicators is verified only when two or more of the three vectors connecting the three ground indicators whose relative positions are verified through the reference point indicator are confirmed to be correct. It is characterized by determining.

Accordingly, the reliability of the information is greatly increased because the integrity of the position can be verified on the ground without digging underground facilities buried underground by the present invention, and unlike the analog method that requires the use of dedicated detection equipment and parts, Economics can be ensured by using only two-dimensional barcodes that consume only cost.

1 is a block diagram showing the configuration of an underground facility location verification apparatus using a third location according to the present invention;
2 is an embodiment of a ground indicator that displays the information in the QR code to the point that can be used as ground indicators according to the present invention,
3 is an embodiment of determining the location of an underground facility based on ground indicators installed at a third location according to the present invention;
4a to 4c is a method for checking whether the ground indicator according to the present invention using the camera of the smartphone,
5 is an embodiment of verifying the position information of another ground indicator by adding the ground indicator determined as normal by the present invention as a reference point,
6a to 6e is a verification method for checking whether or not the normal position of the underground facilities buried in the area to be confirmed by the ground indicator according to the present invention.

Other objects, features and advantages of the present invention will become apparent from the following detailed description of embodiments with reference to the accompanying drawings.

Referring to the accompanying drawings, a preferred embodiment of the device for verifying the location of underground facilities using a third location according to the present invention will be described below.

However, the present invention is not limited to the embodiments disclosed below, but can be implemented in various different forms, only the embodiments to complete the disclosure of the present invention and complete the scope of the invention to those skilled in the art. It is provided to inform you. Therefore, the embodiments described in this specification and the configurations shown in the drawings are merely the most preferred embodiments of the present invention and do not represent all the technical ideas of the present invention. Therefore, It is to be understood that equivalents and modifications are possible.

Hereinafter, exemplary embodiments of the present invention will be described in detail with reference to the accompanying drawings.

1 is a block diagram showing the configuration of an underground facility location verification apparatus using a third location according to the present invention.

The underground facility location verification apparatus using the third location according to the present invention is installed on the ground of a plurality of spots with little movement of the seat, and includes the base information, location information, and information of underground facilities buried nearby. A plurality of ground indicators 10-1, 10-2, ..., 10-n; A plurality of reference point indicators 20-1, 20-2, ..., 20-n which are installed at reference points whose positions do not change during completion inspection or maintenance; The information is obtained from the plurality of ground indicators 10-1, 10-2, ..., 10-n and the plurality of reference point indicators 20-1, 20-2, ..., 20-n. A user terminal 30 which grasps the base information, the location information, and the location information of the underground facility 100 buried nearby, on which the ground indicators and the reference point indicators are installed; A communication network 40 providing communication between the user terminal 30 and the location information server 50; The plurality of ground indicators 10-1, 10-2,..., 10-n and encryption codes included in the reference point indicator 20 are received by the user terminal 30 through the communication network 40. It consists of a location information server 50 to decode the information contained in the ground indicators (10-1, 10-2, ... 10-n) and the reference point indicator 20 and transmits the information back to the user terminal (30) do.

Unexplained code 60 is a server of the National Geographic Information Institute, and provides geographic information of the area requested by the location information server 50. The marks of the ground indicators and the control point indicators are indicated using the representative numbers 10 and 20 when they do not need to be distinguished.

A plurality of ground indicators (10-1, 10-2, ... 10-n) according to the present invention measures the third point around the underground facilities when constructing underground facilities, and the base information, location information and The information of the underground facility is stored in a code (for example, a barcode, a two-dimensional code including a QR code, etc.) or an electronic tag such as NFC-based RFID.

At this time, the base information, the location information of the measured ground indicators (10-1, 10-2, ... 10-n) and the information of the underground facilities are encrypted and stored so that it cannot be known by general means.

Points on the ground surface are prominent and less visible, such as signs, telegraph poles, stone burials, and surface ponds. This is not the case.

In addition, the point where there is little possibility of movement, for example, public institutions, landmark-scale large buildings, special facilities, and the National Geographic Information Institute reference point installation point, installs reference point indicators 20 on the ground and measures location information regardless of underground facilities. The measured information is stored in a code (for example, a barcode, a two-dimensional code including a QR code, etc.) or an electronic tag such as NFC-based RFID.

Similarly, the base information, the location information and the information of the underground facilities of the measured reference point indicators 20-1, 20-2, ... 20-n are encrypted and stored so that they cannot be known by general means.

In Figure 2 is shown an embodiment of the ground indicator to display the information in the QR code to the point that can be used as ground indicator according to the present invention.

The ground indicator 10 used as the third indicator by the present invention can use almost any point installed on the ground where the underground facility 100 is buried, as shown in the large building 21, stone fixing indicator ( 12) QR codes 12a and 13a for measuring location information of traffic signs 13, traffic lights 14, indicator ponds 22 installed as surveying reference points, and government office buildings 23 and displaying the measured information. Mark 14a, 21a, 22a, and 23a) in a place that is prominent and less mobile.

In particular, reference point indicators 20, such as large buildings 21, public offices 23, and indicator ponds 22 of the National Geographic Information Institute, which rarely move seats, can be used as measurement reference points.

The user terminal 30 according to the present invention may be a widely used portable terminal such as a general telephone, a smart phone, a PDA, a tablet PC, and the plurality of ground indicators 10-1, 10-2, ... n) and receiving information from a code (for example, a QR code, etc.) including the information displayed on the reference point indicators 20-1, 20-2, ..., 20-n. 10-2, ... 10-n) and the base information, location information, and underground facilities buried nearby where the multiple reference point indicators (20-1, 20-2, ..., 20-n) are installed. The information of 100 is obtained and provided to the location information server 50 through the communication network 40.

The location information server 50 according to the present invention receives geographic data from the server 60 of the National Geographic Information Institute, verifies and compares these location measurement data with geographic data, performs verification of reliability, reviews reliability, and performs data analysis. Done.

Based on the analysis results, it is possible to verify the location information of underground facilities and to provide the basic data necessary for management, thereby providing basic data for future maintenance plan and repair.

3 shows an embodiment for determining the location of an underground facility based on the ground indicators installed in a third location by the present invention.

Information stored in a number of ground indicators (10-1, 10-2, ..., 10-n) through the measurement is the base information, location information, and underground facilities buried nearby. In particular, the neighboring underground facility information is stored not only absolute coordinates but also relative coordinates (3D vector).

The user reads the information of the ground indicators 10-1, 10-2, and 10-3 using the user terminal 30 to determine the location of the ground indicators 10-1, 10-2, and 10-3. If the base information, the location information, the information of the underground facilities buried nearby can be known, and the information of the ground indicators (10-1, 10-2, 10-3) read in this way to the location information server 50 The location information server 50 receives the geographic information from the National Geographic Information Institute server 60 and provides it to the user terminal 30 again.

The location information of the underground facilities (100-1, 100-2) can be known from the information on the underground facilities of the point where the ground indicators (10-1, 10-2, 10-3) are located, and at this time When the location of the underground facility is confirmed through the information, a triangular plane 71 formed by the three ground indicators 10-1, 10-2, and 10-3 and two ground indicators 10-1 and 10- 3) and the underground facilities (100-1, 100-2) entering the triangular surface 72 formed by the reference point indicator 20 can be confirmed that the normal position.

Underground facilities (100-3) that do not enter the triangular plane (71, 72) can be confirmed that the normal position, but because it is located close to the normal ground indicator (100-3) it is possible to determine whether or not normal by the actual survey.

Since the ground indicator 10-4 is not confirmed to be in a normal position, the ground indicator 10-4 cannot be used for verifying the location of the underground facility 100. Thus, the triangular plane formed by the normal ground indicators 10-2 and 10-3 and the ground indicator 10-4. The underground facility (100-5) located at (73) is a point where the normal position cannot be identified using the ground indicators (10-1, 10-2, 10-3).

At this time, if the normal position is not confirmed using a separate ground indicator, the position is likely to be wrong.

4A to 4C illustrate a method of checking whether the ground indicator according to the present invention is normal by using a camera of a smartphone.

As shown in FIG. 4a, the marker 11 is installed by raising the pole 11a on the ground indicator 10 to check whether it is normal. The marker 11 should be sized to be photographed by the camera of the user terminal 30 even at a long distance (for example, the distance between the ground indicator 10 and the reference point 20) and the simple shape and color may be distinguished from surrounding objects. Must have

For example, the marker 11 according to the present embodiment is constituted by a rectangle having blue (or red, green, etc.) having a width of 2 m and a length of 1 m.

The method of measuring the position of the ground indicator 10 at the third position from the reference point 20 may be various methods such as manual surveying, instrumentation, and precision GPS measurement. However, the present embodiment is an embodiment of the method for measuring the position with only the user terminal 30 (for example, smart phone, etc.) without such a specific device or means. This will compensate for the inaccurate smartphone GPS feature.

The distance between the ground indicator 10 and the reference point 20 is calculated using a proportional equation based on the size of the marker 11 taken by photographing the marker 11 with the camera of the user terminal 30, and the angle between the two points. Calculate to find the direction.

At this time, the direction can be easily obtained by using the electronic compass and gyrometer built into the user terminal 30. However, if the precision is not perfectly accurate, it will affect the tolerance and measurement is necessary.

As described above, the distance (scalar) and the direction (vector) between the ground indicator 10 and the reference point 20 are obtained, and then the direction vector to the corresponding point is obtained using the product of the distance and the direction.

The measurement using the camera of the user terminal 30 may also cause an error, so the calculated tolerance range for each measured distance is reflected. At this time, the tolerance occurs according to the camera performance, so measure the tolerance through experiment.

The absolute coordinates stored in the QR code or the RFID tag of the ground indicator 10 are read and compared with the position coordinates measured by the user terminal 30 or the position coordinates measured by manual surveying, instrumentation, or precision GPS measurement. Check whether is within tolerance.

It is possible to know whether the point of the ground indicator 10 has moved by whether the absolute coordinate of the ground indicator 10 is within the tolerance range of the position coordinate measured by the various methods.

That is, as shown in FIG. 4C, when the absolute coordinate of the ground indicator 10a is within the tolerance range of the measured position coordinates, the ground indicator 10a does not move or moves only a very fine distance. The location information stored in 10a can be used.

If there is a possibility that the ground indicator 10a has moved within the tolerance range, even if there is such a movement, in order to determine that the ground indicator 10a can be used as a ground indicator, the measurement conditions may be limited to minimize the tolerance range. Use high performance cameras to minimize tolerances during measurement.

However, if the absolute coordinate of the ground indicator 10b is outside the tolerance range of the measured position coordinates, it means that the point of the ground indicator 10b has moved greatly, and thus the position information stored in the ground indicator 10a is Can not use it.

The location information of the ground indicator 10a usable in this way may be stored in a storage space of the user terminal 30 and used as another reference point.

5 shows an embodiment of verifying the position information of another ground indicator by adding the ground indicator determined as normal by the present invention as a reference point.

 The ground indicators (eg, 10-1 and 10-2) whose relative positions have been verified through the reference point indicator 20 are also exactly the same, so that the verified ground indicators 10-1 and 10-2 are Can be used as a new reference point.

For example, as shown in FIG. 5, the ground indicator 10-3 may be verified using the verified ground indicator 10-1, and the ground indicator may be verified using the verified ground indicator 10-2. 10-4, 10-6) can be verified. Similarly, the ground indicators 10-5 and 10-6 may be verified using the verified ground indicators 10-3 and 10-4.

Using six verified ground indicators (10-1 to 10-6) as the reference point, the ground indicators (10) of another measuring point are verified while the measurement is continued. It is possible to verify all ground indicators (10) in the area of interest.

At this time, the three ground indicators (10-1, 10) only when two or more of the three vectors connecting the three ground indicators (for example, 10-1, 10-2, 10-3) are confirmed to be correct. Only the area consisting of -2, 10-3) is determined as the verified area.

Therefore, the triangular plane 74 surrounded by the ground indicators 10-5 and 10-6 among the unvalidated areas can be determined as the verified area, but the triangular plane which is the ground indicators 10-4 and 10-5 as the base. (75) cannot be determined as the verified area because the ground indicators 10-7 have not been verified.

6A to 6E illustrate a verification method for confirming whether or not the position of the underground facilities buried in the area to be checked by the ground indicator according to the present invention is normal.

Underground facilities (100-2, 100-) to check whether the buried positions of the underground facilities (100-2, 100-3, 100-4, 100-5) buried in the area 76 to be checked are ok. 3, 100-4, 100-5) select the reference point and the measurement point near. Here, the reference point indicator 20 is installed at the reference point, and the point where a plurality of ground indicators 10-1 to 10-5 are installed at the measurement point is selected.

The measuring point is a point from which the position and direction of the reference point can be calculated, and two or more points are selected in order to be able to generate a surface after each point.

Code or RFID of the reference point indicator 20 and each ground indicator 10-1 to 10-5 by measuring the distance and azimuth between the reference point indicator 20 and the ground indicators 10-1 to 10-5 of each measurement point. Check whether the existing coordinates read from the tag match.

 As shown in FIG. 6B, when the ground indicators (eg, 10-5) of the measuring points that do not coincide with the existing coordinates are separately recorded and the corresponding measuring points are connected to generate the triangular plane 77, the corresponding triangular plane 77 It is very likely that the location point of the underground facilities in the area of is not moved because the current measured coordinates match the previously measured coordinates.

This is because the existing coordinates recorded in the ground indicators coincide with the current measured coordinates, at least because there is no change in the ground, so it is highly likely that no change has occurred in the basement.

In this case, as shown in FIG. 6C, the ground indicators 10-1 and 10-2 of the measurement points determined to be normal positions are currently measured by the existing position coordinates recorded at the time of installation of the ground indicators (when the underground facilities are installed). Since the positioning content is normal, such as coinciding with the coordinates, it may be another reference point.

That is, the position coordinates of the other ground indicators 10-3 and 10-4 may be verified using the position coordinates of the verified ground indicators 10-1 and 10-2. When the position coordinates of the ground indicators 10-4 are verified using the position coordinates of the ground indicators 10-1 and 10-2 verified in this way, the ground indicators 10-1, 10-2, and 10-4 are formed. Underground facilities 100-2 and 100-3 located in the triangular plane 78 are very likely to have no positional variation.

Using the position coordinates of the ground indicators 10-1 and 10-2 verified as described above, the verification area is continuously expanded while verifying the position coordinates of the other ground indicators 10-3 and 10-4.

If the ground indicators 10-2 and 10-4 are verified as shown in FIG. 6D and the determination point of the ground indicators 10-3 is not determined to be normal, the ground indicators 10-2, 10-3, Underground facilities 100-5 which are not located in the triangular plane 79 formed by 10-4) are very likely to have land / ground movement, and the information in the triangular plane 79 is determined to be unreliable.

Therefore, it is possible to verify whether the position coordinate is normal again using another measuring point or re-measure it by the location information recorded in the ground indicator 10-3 at the measuring point of the underground facility 100-5. Be sure to check.

As shown in FIG. 6E, when two or more of the vectors connecting the ground indicators 10-2, 10-4, and 10-6 installed at the three measurement points are verified to be normal, they are located in the corresponding triangular plane 79. The underground facility 100-5 may be determined to be normal.

Thus, whether the ground indicators (10-2, 10-4, 10-6) forming the triangular plane (79) including the underground facilities (100-5) by checking the normal status of the underground facilities (100-5). Unnecessary measurement work or recognition work, such as making a measurement, can be reduced.

10-1, 10-2, ..., 10-n: Ground Indicator 11: Marker
12: Stone fixation indicator 13: Traffic sign
14: Traffic lights 20-1, 20-2, ..., 20-n: Reference point indicator
21: large building 22: surface pond
23: public office building 30: user terminal
40: communication network 50: location information server
60: National Geographic Information Institute server 100: Underground facilities

Claims (13)

A plurality of ground indicators (10-1, 10-1, installed on the ground of a plurality of points where no seat movement occurs when constructing underground facilities, including base information, location information, and information of the underground facilities buried nearby) 10-2, ..., 10-n);
A plurality of reference point indicators 20-1, 20-2, ..., 20-n installed at points where there is no possibility of movement;
The information is obtained from the plurality of ground indicators 10-1, 10-2, ..., 10-n and the plurality of reference point indicators 20-1, 20-2, ..., 20-n. A user terminal 30 which grasps the base information, the location information, and the location information of the underground facility 100 buried nearby, on which the ground indicators and the reference point indicators are installed;
A communication network 40 providing communication between the user terminal 30 and the location information server 50;
The plurality of ground indicators 10-1, 10-2,..., 10-n and encryption codes included in the reference point indicator 20 are received by the user terminal 30 through the communication network 40. It consists of a location information server 50 to decode the information contained in the ground indicators (10-1, 10-2, ... 10-n) and the reference point indicator 20 and transmits the information back to the user terminal (30) ,
The pole 11a is installed on the ground indicator 10 to install the marker 11, and the marker 11 is photographed by the camera of the user terminal 30 at the reference point indicator 20 proximate to the ground indicator 10. The distance between the ground indicator 10 and the reference point indicator 20 is calculated by using a proportional expression based on the size of the marker 11 photographed, and the direction is calculated by calculating the angle between the two points. Device for verifying the location of underground facilities using location.
The method of claim 1,
The plurality of ground indicators 10-1, 10-2,. , 20-n) is an underground facility location verification device using a third location, characterized in that installed in the public institutions, landmark-scale large buildings, special facilities, the National Geographic Information Institute reference point installation point where there is no mobility.
delete 3. The method according to claim 1 or 2,
The plurality of ground indicators (10-1, 10-2, ..., 10-n) stores the base information, location information of the point and the information of the underground facilities in a two-dimensional code or electronics such as NFC-based RFID Underground facility location verification apparatus using a third location, characterized in that stored in the tag.
The method of claim 1,
The user terminal 30 is an underground facility location verification apparatus using a third location, characterized in that the portable terminal widely used as a general telephone, smart phone, PDA, tablet PC.
The method of claim 1,
The user terminal 30 includes a triangular plane 71 formed by three ground indicators selected from the plurality of ground indicators, or two ground indicators selected from the plurality of ground indicators and one selected from the plurality of reference indicators. Underground facilities (100-1, 100-2) entering the triangular surface 72 formed by the reference point indicator 20, the underground facility location verification apparatus using a third position, characterized in that the check to the normal position.
delete The method of claim 1,
The marker 11 is a size that can be photographed by the camera of the user terminal 30 even at a distance between the ground indicator 10 and the reference point 20 and is characterized by having a simple shape and color while being distinguished from surrounding objects. Underground facility location verification device using the position of 3.
The method of claim 1,
Device for verifying the location of underground facilities using a third position, characterized in that to obtain a direction using the electronic compass and gyrometer built in the user terminal (30).
The method of claim 1,
The distance between the ground indicator 10 and the reference point indicator 20 is calculated by using the camera of the user terminal 30 to calculate and reflect the tolerance range for each distance measured at the time of calculation, and the tolerance depends on the performance of the camera. An underground facility location verification apparatus using the third location, characterized in that the tolerance is measured through the experiment because the difference occurs.
The method of claim 1,
When the absolute coordinate of the ground indicator 10 is within the tolerance range of the position coordinate measured by the user terminal 30 or the position coordinate measured by manual surveying, instrumentation, precision GPS measurement, etc., the ground indicator 10 The location information of the underground facility location verification apparatus using a third location, characterized in that stored in the storage space of the user terminal 30 to use as another reference point.
The method of claim 1,
The ground indicators 10 whose relative positions have been verified through the reference point indicator 20 are used as new reference points, and the ground indicators 10 of another measurement point are used using the verified ground indicator 10 as the reference point indicator 20. The underground facility location verification apparatus using the third location, characterized in that the measurement continues while verifying the).
The method of claim 1,
Only the area consisting of the three ground indicators 10 is verified if only two or more of the three vectors connecting the three ground indicators 10 whose relative positions have been verified through the reference point indicator 20 are found to be correct. Underground facility position verification apparatus using the third position, characterized in that the determined area.

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