ELECTRIC ENERGY SENSOR AND ELECTRIC ENERGY DETECTION SYSTEM

摘要

<P>PROBLEM TO BE SOLVED: To provide an electric energy sensor and an electric energy detection system detecting individually electric energy of each power product nondestructively without a power supply. Ž<P>SOLUTION: This sensor is provided with: a current transformer part 1 mounted on an AC cable C of an electric product connected to a power line, for generating an electromotive force by electromagnetic induction caused by a current flowing in the AC cable C; a power storage circuit part 2 for storing power by an electromotive force generated by the current transformer part 1; and a signal transmission part 3 for transmitting by radio a signal by stored electric power when the stored power amount in the power storage circuit part reaches a fixed operation voltage. Ž<P>COPYRIGHT: (C)2010,JPO&INPIT Ž