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Recently, how to save electricity has become the focus of social concern. In order to avoid wasting electricity, many universities limit the power supply. However, there are still many aspects need to be improved in dormitory electricity management. Installing some pyroelectric infrared sensors to detect whether someone is in the dormitory can effectively solve the problem of forgetting to turn off the lights after leaving. This paper mainly applies the mathematical modeling method to calculate the required number and the installation location of sensors. When the sensors find that no one is in the hostel we can use our system to cut all power off, so as to save the electricity.

Dormitory Model Based on the Arrangement of Pyroelectric Infrared Sensor