基于自发光图像的火焰稳定性指标及图像拍摄装置

By capturing and processing images of self-luminous OH* and CH* flames and calculating the self-luminous intensity, the problems of false alarms, missed alarms, and lack of objectivity in existing combustion detection equipment are solved, thus achieving accuracy and objectivity in flame stability detection.

CN118587402BActive Publication Date: 2026-07-17HUAZHONG UNIV OF SCI & TECH

Patent Information

Authority / Receiving Office
CN · China
Patent Type
Patents(China)
Current Assignee / Owner
HUAZHONG UNIV OF SCI & TECH
Filing Date
2024-06-06
Publication Date
2026-07-17

AI Technical Summary

Technical Problem

Existing optical combustion detection equipment is susceptible to load changes, leading to inaccurate location identification, false alarms, and missed alarms. Furthermore, combustion detection systems lack objectivity and rely on operator experience.

Method used

A flame stability index based on self-luminous images is adopted. By capturing self-luminous OH* and CH* flame images, preprocessing them, determining the flame region, and calculating the self-luminous intensity, the flame stability is characterized by the relative intensity of the self-luminous intensity N(M*) and the maximum self-luminous intensity N(M*)max. Flame detection is performed by combining an ultra-wide-angle lens and a multi-head image transmission fiber bundle.

Benefits of technology

It improves the accuracy of flame stability detection, accurately characterizes the critical points of different combustion stages, reduces false alarms and missed alarms, and provides an objective judgment of flame stability.

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Abstract

基于自发光图像的火焰稳定性指标及图像拍摄装置,步骤为分别拍摄若干煤燃烧的两类火焰图像:自发光OH*火焰图和CH*火焰图;对两类火焰图像分别进行预处理;选取经预处理后火焰图像的特征参数,并确定两类火焰图像的火焰区域;计算火焰区域的自发光强度,用以表征煤的燃烧过程以及火焰的稳定性。本发明采用自发光强度能够赋予其此处燃烧反应快慢程度,通过统计多种煤种燃烧状况,发现自发光强度N(M*)与最大自发光强度N(M*)max的相对强度能够表示不同燃烧阶段的临界点,自发光强度N(M*)也可以表征火焰稳定性;利用紫外波段光纤能够有效过滤其他波段的基团光谱影响,有效提高自发光基团发光强度测量精度。
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