Non-contact Remote Ammonia Leak Detection System and Measurement Method using Raman LiDAR

The non-contact Raman lidar system efficiently detects and quantifies ammonia gas concentration using a UV-COB LED and PLS algorithm, overcoming distance and interference challenges for precise, real-time leak detection and safety management.

KR103000350B1Active Publication Date: 2026-08-05KOREA INST OF CIVIL ENG & BUILDING TECH
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Patent Information

Application Number
KR1020250203049
Authority / Receiving Office
KR · KR
Patent Type
Patents
Current Assignee / Owner
Filing Date
2025-12-18
Publication Date
2026-08-05
Estimated Expiration
2045-12-18

AI Technical Summary

Technical Problem

Existing ammonia gas detection technologies struggle to provide high-precision, long-distance, and non-contact detection, especially in large-scale facilities, due to limitations in real-time measurement, external optical interference, and signal degradation, failing to address the explosion risk and human safety concerns posed by ammonia leaks.

Method used

A non-contact Raman lidar system using a UV-COB LED light source, variable focus optical system, and Partial Least Squares (PLS) algorithm to detect and quantify ammonia gas concentration from a distance by selectively separating Raman signals and applying PLS regression analysis on the entire spectrum data.

Benefits of technology

Enables rapid and accurate detection of ammonia leaks in large spaces with reduced exposure risk, providing early warning and safety management in industrial sites, and supporting scalable applications across various platforms.

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Abstract

The present invention relates to an ammonia Raman scattering spectrum-based leak detection system and measurement method that combines Raman scattering spectrum and LiDAR optical technology to detect and quantitatively analyze ammonia gas leaked at a distance in real-time in a non-contact manner. The remote ammonia leak detection system using a non-contact Raman LiDAR according to the present invention comprises: a light source unit that irradiates light onto a detection target area; a beam splitter that passes the light irradiated from the light source unit and reflects backscattering light from the ammonia gas in the detection target area to align the light path coaxially; a variable focus optical system disposed between the beam splitter and the detection target area and composed of a combination of multiple lenses arranged to face each other, which varies the focal length of the light by adjusting the spacing between the lenses; and a signal detection unit that selectively separates a Raman signal band corresponding to ammonia gas from the light received through the variable focus optical system and the beam splitter and converts it into an electrical signal. and may include an analysis module that receives spectrum data obtained from the electrical signal of the signal detection unit and calculates the concentration of ammonia gas.
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