Laser Identification System for Stationary Structure Abnormality Detection
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Solution Overview
Problem
Existing monitoring systems for stationary structures cannot accurately identify the location of abnormalities, such as peeled-off surface members, as they only detect the presence of abnormalities without providing means to determine the occurrence location.
Innovation Solution
An identification system that uses laser light to acquire position and wavelength information from a stationary structure, identifying abnormal portions based on wavelength shifts due to the Doppler effect, and monitors these areas for precise location detection.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Reliability
If LiDAR is used to detect vibration speed of a structure, then abnormality detection capability is improved, but ability to identify abnormality occurrence location deteriorates
Solution Approach 1:
The patent divides the structure into multiple measurement points and uses multiple LiDAR devices or multiple wavelengths to measure each point independently. By segmenting the structure into discrete locations and measuring wavelength shifts at each segment, the system can identify both the presence and specific location of abnormalities. The abnormality detection function is segmented across multiple measurement points, allowing location identification while maintaining detection capability.
2Ease of operation
If only vibration speed detection is implemented, then detection simplicity is improved, but monitoring effectiveness deteriorates
Solution Approach 1:
The patent changes the measurement parameter from only vibration speed to include both vibration speed and wavelength shift. By measuring the wavelength shift of reflected light at each position, the system obtains additional information about the structural state without significantly complicating the detection process. The LiDAR device continues to emit and receive light, but now analyzes wavelength changes in addition to intensity changes, thereby improving monitoring effectiveness while maintaining operational simplicity.
Applied Scientific Principles
This section explains which scientific principles are used to turn an abstract innovation direction into a practical engineering solution.
Function Achieved in This Case
Enables accurate identification and monitoring of abnormality occurrence locations in stationary structures, improving the detection of abnormalities by correlating wavelength shifts with positional data to pinpoint damaged areas.
Implementation Method 1
wavelength information based on a wavelength of the reflected light reflected at the each position
Data Source
AI summary
The identification system includes: an acquisition circuit that, on the basis of laser light illuminated onto respective positions in a space of interest including the stationary structure, and reflected light of the laser light, acquires position information corresponding to the respective positions and wavelength information based on the wavelength of the reflected light reflected at the respective positions; an identification circuit that identifies an abnormal location among the positions where an abnormality with respect to the stationary structure is occurring, on the basis of the wavelength information; and a monitor that monitors the abnormal location.