为保证对船舶动力舱极早期火灾探测的及时性、准确性和可靠性，需要对烟雾浓度检测原理进行改进和烟雾浓度算法的创新。基于电容式检测元胞结构对烟雾浓度检测原理进行全新设计，并采用多尺度烟雾粒子浓度检测算法对检测信号进行处理，以计算出烟雾粒子浓度。试验结果表明:新设计的探测器可实现对0～10％obs/m浓度烟雾粒子的有效检测，检测精度高于百万分比浓度(Parts Per Million，PPM)级;探测器的灵敏度可以达到PPM级;在存在一定浓度的油气和不同粒径灰尘的使用环境中，仍能实现高于PPM级精度的烟雾粒子浓度检测。
Design of Capacitive Smoke Detector for Marine Powerhouse
In order to ensure the timeliness,accuracy and reliability of early fire detection in the powerhouse of a ship,the smoke detectors face the challenges of high detection accuracy,sensitivity and high reliability in complex use environments. The smoke concentration detection principle should be improved and the smoke concentration algorithm should be innovated to improve the smoke detectors. A new design of the smoke concentration detection principle is made based on the capacitive detection metacell structure,and a multi-scale smoke particle concentration detection algorithm is used to process the detected signal for calculating the smoke particle concentration. Experiments show that the newly designed detector can realize the effective detection of smoke particles with a concentration of 0-10％ obs/m and the detection accuracy higher than parts per million ( PPM ) level;the sensitivity of the detector can reach PPM level;and in the environments with a certain concentration of oil and gas and dust of different particle sizes,it can detect the smoke particle concentration with an accuracy higher than PPM level.
marine powerhouseextremely early fire detectionsmoke concentration detectioncapacitive detectionmultiscale signal processing
万方数据
维普
