Tiny Low-Power WSN Node for the Vehicle Detection
Michal Chovanec, Michal Hodoň, Lukáš Čechovič · 2014
In this paper, a tiny low-power wireless sensor network (WSN) node based on msp430 microcontroller is introduced. The node should be serving the needs of a special WSN used for traffic monitoring, or more precisely for the indication of vehicle’s presence. The single vehicle detection is based on the uti-lization of magnetometer sensor, where the change of Earth’s magnetic field, caused by the movement of passing vehicle, is measured. Communication subsystem of the node is based on the low-power sub-GHz transceiver cc1101 implemented together with the special, energy-efficient communication protocol in 868 MHz ISM band. In line with low-power architecture, environment friendly power consumption of the node was reached. It is equal on average to 300uA, when transmitting period is 1s and magnetometer data col-lection rate is equal to 20Hz. Povzetek: Opisan je novi senzor oz. senzorsko omrežje za zaznavanje prometa. 1