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Research and Development of Triple Channels Infrared Flame Detector

Author: YuanJiDe
Tutor: HuangWenJun
School: Zhejiang University
Course: Control Theory and Control Engineering
Keywords: Tri-band infrared flame detection Flame recognition algorithm Sensitivity Reliability Prototype
CLC: TH89
Type: Master's thesis
Year: 2012
Downloads: 62
Quote: 0
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Abstract


The state-of-the-art fire detection technology has great significance to ensure the safe production of petrochemical sites . The existing fire detectors exist long response time , low sensitivity , detection reliability and low , it is difficult to meet the the scene demanding requirements of complex industrial production . Of this study and the development of a new tri-band infrared flame detectors , focused on solving the problem : First, the proposed tri-band infrared flame detection program . Three infrared sensors to monitor based on the in-depth study of the the flame radiation spectrum , artificial heat sources and background radiation spectrum establishes flame , artificial heat source of interference and background radiation interference band . The probe response time is shortened by the early fire detection signal characteristics of the infrared radiation material burning . Through the acquisition and analysis of interference information characteristics , improve the anti-jamming capability . Screening true flame flame flicker frequency signal to improve detection reliability . Secondly, the design of a high sensitivity tri-band flame recognition algorithm . The tri-band radiation signal strength increased detection range and attenuation , and logical relations are relatively stable . Determined through the analysis of the logical relationships between the three bands of radiation intensity infrared radiation source type , the distinction between the flame and infrared radiation signal , greatly increase the effective detection range of the flame signal , greatly improve the flame detection sensitivity . Finally, the DSP as the core , tri-band infrared flame detector hardware and software design . But due to limited time , only the development of the system prototype was tested in the prototype of the detection range , anti-interference ability . The test results show that the performance of the prototype , but relatively foreign advanced flame detection system is still a certain gap . The system can be further enhanced through the use of better performance of infrared sensors , and design the the better hardware circuit and infrared optical lens system , the overall detection performance .

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