Abstract
To meet the needs related to detecting dust, this paper describes a system based on ZigBee communication technology, which allows for smart real-time monitoring of the concentrations of dust in system fields. The system is mainly composed of a particulate matter sensor module, data acquisition and processing module, and a ZigBee communication module. ZigBee communication technology replaces traditional monitoring systems that transmit data by wired cable or via a mobile communication base station. The particulate-matter-detecting sensor uses a PD4NS dust sensor based on the principles of photoelectricity and particle counting. It can detect particles whose size is greater than 1 μm. Its maximum detection range is up to 8,000 pcs/283 mL with measured results at Pulse Width Modulation (PWM). Currently, the system obtains signals sampled by the PD4NS dust sensor and handled by a microcontrol unit (MCU) and then data are sent to the monitoring center (PC) via a ZigBee communication network. The system can be applied to similar monitor systems based on the Internet of Things because of its simple structure, low cost, and high movability.
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