Door Monitoring System Using Sensor Node with Zero Standby Power

The wireless sensor network (WSN) is a promising technology to improve our social life by the environmental monitoring, patient monitoring, structure monitoring, security monitoring and so on. However, the WSN has a significant problem preventing its spread usage. This problem is the battery exchange for many sensor nodes. To make the battery changing rarely happen, we have proposed a sensor node architecture with zero standby power. We performed the preliminary experiments for the proposed node to verify the functionality of our proposal. However, we have never shown an application employing our sensor node and estimated how much the battery life can be extended compared with the conventional nodes. This paper demonstrates the door monitoring system using our sensor nodes as a WSN application. The result of the case study has shown that the proposed sensor nodes can implement a door monitoring system on the WSN and significantly reduce the power consumption during the standby compared with the conventional node. Finally, we show that our sensor node can extend the battery life of 44 times and 4.4 times compared with the conventional node when the number of activations per day is 10 and 100 respectively.