Multi-information-fusion intelligent flame detecting device and detecting method thereof

Abstract

The invention discloses a multi-information-fusion intelligent flame detecting device and a detecting method thereof. The device comprises a Pbs infrared sensor, a first signal processing circuit module, a first control unit, a visible image sensor, a second signal processing circuit module and a second control unit, wherein the output end of the Pbs infrared sensor is connected with the input end of the first signal processing circuit module, the output end of the first signal processing circuit module is connected with the input end of the first control unit, the output end of the visible image sensor is connected with the input end of the second signal processing circuit module, the output end of the second signal processing circuit module is connected with the input end of the second control unit, and the output end of the second control unit is connected with the input end of the first control unit. The device combines advantages of two sensors to comprehensively evaluate flame quality, can comprehensively evaluate flame quality of coal combustion according to the advantages of a flame image sensor and the infrared sensor, can make up defects and enables flame detection to be objective, real and reliable.

Description

technical field [0001] The invention relates to a multi-information fusion intelligent flame detection device and a detection method thereof. Background technique [0002] At present, the research on flame detection in foreign countries generally goes through the following stages: [0003] Phase 1: Radiant Light Energy Flame Detection [0004] Commonly used radiant light energy fire detection is basically based on the infrared, visible light and ultraviolet rays radiated by the flame during the combustion process. [0005] Infrared flame detection judges the existence of flame by detecting the infrared intensity and flame frequency emitted by the combustion flame. The probe adopts lead sulfide photocell or silicon photodiode. Since the flickering frequency of the flame in the fire area of ​​the furnace is completely burning is relatively stable, through the filter circuit, the infrared flame detector can distinguish the burner flame from the background flame. A typical pr...

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Problems solved by technology

[0015] At present, most of the domestic flame detection uses the flame detectors produced by foreign companies such as FORNEY and ABB. "Peeping" phenomenon (refers to the fact that there is no flame or the flame is very small due to the detected information such as the intensity of the flame of the adjacent or relative position of the combustion nozzle, which leads to misjudgment), this "peeping" phenomenon will bring False positives and negative negatives may lead to direct economic losses, and more seriously, the hazards of furnace explosions

[0016] Due to the large differences in the volatile content of domestic coal, it is difficult for foreign flame detection devices to adapt to different coal types in China, especially under the dynamic working conditions of the combustion furnace, false alarms and missed alarms occur.

[0017] Most of the domestic image flame detection is located in the digital image processing and monitoring system of the whole furnace flame. This image flame detection detects the macroscopic flame combustion of the entire furnace. The research is limited to judging whether there is fire in the furnace by methods such as flame burner outline size and texture judgment. As for the quantitative evaluation of the flame combustion quality and the control of the air supply volume based on the current flame combustion image analysis results, it is still under research. state

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