Hybrid Modulation Optical Communication and Specific Wavelength Device-based Water Mist and Smoke Discrimination Sensing System

This article aims to address the limited sensitivity caused by indoor light source interference and false alarms due to cooking smoke in optoelectronic smoke detection applications. We propose a hybrid modulation optical communication and specific wavelength device-based water mist and smoke discrimination sensing system. The system achieves anti-indoor light source interference at both component and circuit levels, and utilizes a self-developed bandpass optical detector combined with an optical communication hybrid modulation algorithm to further increase the signal-to-noise ratio. Additionally, based on the optical characteristics of smoke, the system uses a multi-wavelength bandpass optical detector array to differentiate between fire smoke and cooking smoke, thereby reducing the system's false alarm rate.