A method using the same light sensor for detecting multiple events near a window in crimes involving intrusion into a home

摘要

To combine robots with many sensor nodes on the sensor network is important for improving home security. To reduce the cost of such a system, it is desirable that each sensor node is very cheap and very small. The three events which occur to the window and the key when a thief attempts to intrude into a house are conventionally detected by different sensors. This article proposes a method of detecting all three events by using a simple light sensor consisting of an infrared LED and a photodetector. In the experiments, the light sensor shows the characteristic tendencies that can detect each event. This fact indicates that our proposal can realize one sensor node more efficiently than using different sensors.