船舶动力舱电容型感烟探测器的设计

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.