Underground localization method and system therefor

Patent metadata

Field	Value
Publication number	US-2016145998-A1
Application number	US-201514680297-A
Country	US
Kind code	A1
Filing date	Apr 7, 2015
Priority date	Nov 25, 2014
Publication date	May 26, 2016
Grant date	—

Abstract

An underground localization method and a system therefor are provided. The underground localization method includes computing location information of a dead reckoning using a gyro sensor and a distance movement sensor of moving equipment, measuring physical information according to the computed location information of the dead reckoning and searching for the physical information which is determined as being matched with the location information of the dead reckoning, and optimizing a location by reflecting location information of the physical information which is determined as being matched with the location information of the dead reckoning.

First claim

What is claimed is:

1 . An underground localization method comprising:
computing location information of a dead reckoning using a gyro sensor and a distance movement sensor of moving equipment; measuring physical information according to the computed location information of the dead reckoning and searching for the physical information which is determined as being matched with the location information of the dead reckoning; and optimizing a location by reflecting location information of the physical information which is determined as being matched with the location information of the dead reckoning.

2 . The underground localization method of claim 1 , wherein the measurement of the physical information and the searching for of the physical information which is determined as being matched with the location information of the dead reckoning comprises:
measuring and mapping the physical information using a sensor according to the computed location information of the dead reckoning; comparing and analyzing the physical information and the location information of the dead reckoning and searching for the physical information which is determined as being matched with the location information of the dead reckoning; and storing location information of the found physical information which is determined as being matched with the location information of the dead reckoning.

3 . The underground localization method of claim 1 , wherein the computing of the location information of the dead reckoning comprises:
measuring a movement length of drill equipment using the distance movement sensor; measuring 3-axis angular velocity values using the gyro sensor; and computing the location information of the dead reckoning.

4 . The underground localization method of claim 2 , wherein the physical information is measurement values in which magnetic fields, gamma rays, and resistivity measurement are measured by at least one or more methods.

5 . The underground localization method of claim 1 , wherein the searching for of the physical information which is determined as being matched with the location information of the dead reckoning comprises:
measuring the physical information according to location information of the dead reckoning at a first sensor, which is installed in a front portion of the moving equipment, when the moving equipment moves forward; measuring the physical information according to location information at a second sensor which is installed in a rear portion of the moving equipment; comparing the results measured by the first and second sensors; and searching for the physical information which is determined as being matched with the location information of the dead reckoning.

6 . The underground localization method of claim 1 , wherein the searching for of the physical information which is determined as being matched with the location information of the dead reckoning comprises:
measuring the physical information according to location information of the dead reckoning at a first sensor when the moving equipment moves forward; measuring the physical information according to location information of the dead reckoning at a second sensor when the moving equipment moves backward; comparing the results measured by the first and second sensors; and searching for the physical information which is determined as being matched with the location information of the dead reckoning.

7 . An underground localization system comprising:
a location computing unit configured to compute location information of a dead reckoning using a gyro sensor and a distance movement sensor of moving equipment; a location re-measurement unit configured to measure physical information according to the location information of the dead reckoning, which is computed by the location computing unit, and to search for the physical information which is determined as being matched with the location information of the dead reckoning; and a location optimizing unit configured to optimize a location by reflecting location information of the physical information which is determined as being matched with the location information of the dead reckoning.

8 . The underground localization system of claim 7 , wherein the location re-measurement unit comprises:
a physical information mapping unit configured to measure and map the physical information using a sensor according to the location information of the dead reckoning, which is computed by the location computing unit; a physical information search unit configured to compare and analyze the physical information and the location information of the dead reckoning and to search for the physical information which is determined as being matched with the location information of the dead reckoning; and a search result storing unit configured to store location information of the found physical information which is determined as being matched with the location information of the dead reckoning.

9 . The underground localization system of claim 7 , wherein the location re-measurement unit comprises:
a first sensor which is installed in a front portion of the moving equipment; and a second sensor which is installed in a rear portion of the moving equipment, wherein the first sensor measures the physical information according to location information of the dead reckoning when the moving equipment moves forward, wherein the second sensor measures the physical information according to location information of the dead reckoning, and wherein the location re-measurement unit compares the results measured by the first and second sensors and searches for the physical information which is determined as being matched with the location information of the dead reckoning.

10 . The underground localization system of claim 7 , wherein the location re-measurement unit comprises:
first and second sensors configured to measure the physical information, wherein the first sensor measures the physical information according to location information of the dead reckoning when the moving equipment moves forward, wherein the second sensor measures the physical information according to location information of the dead reckoning when the moving equipment moves backward, and wherein the location re-measurement unit compares the results measured by the first and second sensors and searches for the physical information which is determined as being matched with the location information of the dead reckoning.

Assignees

• Korea Advanced Inst Sci & Tech

Inventors

• Myeong Hyeon
• Park Byeol Teo
• Oh Taek Jun
• Choi Su Young

Classifications

• E21B47/09 Primary

  Locating or determining the position of objects in boreholes or wells {, e.g. the position of an extending arm}; Identifying the free or blocked portions of pipes · CPC title

• E21B47/092

  by detecting magnetic anomalies · CPC title

• G01C21/12 Primary

  executed aboard the object being navigated; Dead reckoning · CPC title

• E21B47/024

  of devices in the borehole (determining slope or direction of the borehole E21B47/022) · CPC title

• E21B47/095

  by detecting an acoustic anomalies, e.g. using mud-pressure pulses · CPC title