Study of the Multi-parameter Measuring System Based on Wireless Sensor Network

According to the effect of water with suspended particles to light propagation and temperature to turbidity and pressure, a multi-parameter measuring system with wireless transceiver and automatic temperature compensation is designed. The measured value of turbidity, temperature and pressure are transmitted to host computer (its monitor system software is written under VisualBasic6.0 program) by radio chip nRF2401. The nRF2401 controlled by single chip C8051F310 works in ShockBurstTM transmission scheme, can realize half-duplex communication. The wireless sensor network with tree and star type is constructed based on field environment and application. The inquiring or reversion mode and mature TDMA communication protocol are used in the network. Experimental results show that the system possesses stable operation, high precision, simple operation, reliable communication (the maximum distance up to 300 m).