Title:
METHOD FOR MEASURING DISPLACEMENT OF STRUCTURE, ON BASIS OF COMBINATION OF ASYNCHRONOUS NATURAL TARGET IMAGE MEASUREMENT DATA AND ACCELERATION DATA, AND SYSTEM THEREFOR
Document Type and Number:
WIPO Patent Application WO/2022/220414
Kind Code:
A1
Abstract:
Disclosed are: a method for measuring a displacement of a structure, on the basis of a combination of asynchronous natural target image measurement data and acceleration data; and a system therefor. A scale factor (α), which is a scale factor between a pixel resolution of image frame data and a distance resolution in a real space, is automatically calculated by using: the image frame data obtained by capturing, over time by a camera installed on a structure to be measured, a stationary target outside the structure at a certain first sample frequency; and acceleration data measured at a certain second sample frequency by an accelerator installed on the structure to be measured. A displacement value of the structure is estimated by using an improved feature point matching algorithm and the scale factor, and a displacement of the structure is estimated with a sampling frequency of the acceleration data by equally combining the image frame data and the acceleration data, which are asynchronous, by using an adaptive heterogeneous sampling frequency Kalman filter while using the estimated displacement value.
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Inventors:
SOHN HOON (KR)
CHOI JAE MUK (KR)
MA ZHANXIONG (KR)
KIM KI YOUNG (KR)
CHOI JAE MUK (KR)
MA ZHANXIONG (KR)
KIM KI YOUNG (KR)
Application Number:
PCT/KR2022/003490
Publication Date:
October 20, 2022
Filing Date:
March 11, 2022
Export Citation:
Assignee:
KOREA ADVANCED INST SCI & TECH (KR)
International Classes:
G01B21/32; G01B11/16; G01D21/02; G01P15/097; G06T7/00; G06T7/50
Foreign References:
| KR102200824B1 | 2021-01-12 | |||
| KR101803503B1 | 2017-11-30 | |||
| KR101996779B1 | 2019-07-04 | |||
| KR102230397B1 | 2021-03-22 |
Other References:
XU Y., J.M.W. BROWNJOHN, F. HUSEYNOV: "Accurate deformation monitoring on bridge structures using a cost-effective sensing system combined with a camera and accelerometers", UNIVERSITY OF EXETER, OPEN RESEARCH EXETER, 21 August 2018 (2018-08-21), XP055977625, Retrieved from the Internet [retrieved on 20221103]
Attorney, Agent or Firm:
PARK, Young-woo (KR)
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