| Summary: | To ensure the safe storage and use of lab hazardous chemicals, this paper designs and develops a 6LoWPAN and WLAN-based hazardous chemicals monitoring system. This system, consisted of 6LoWPAN sensing nodes, edge router, IPv4/IPv6 network and user terminal, adopts 6LoWPAN protocol to realize point- to-point communication between wireless sensor network (WSN) and internet. It transmits collected lab environment information to remote upper machine software through IPv4/IPv6 protocol, with a view to achieving real-time monitoring and abnormal data warning in terms of lab indoor temperature, humidity, CO density, CO2 density and hazardous gases (ammonia gas, aromatic compounds, sulfides, benzene vapors) density. This paper details the hardware framework and software framework realization process of this system, and finally based on Laboratory Virtual Instrument Engineering Workbench (LabVIEW), develops the upper machine management software for hazardous chemicals monitoring system. Experiment results show that this system can accurately obtain monitoring data and warn against abnormal data, so it meets the monitoring requirements for lab environment.
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