PROBLEM TO BE SOLVED: To provide a power supply system capable of supplying power from a moving mobile body to a positionally fixed body to be supplied with power by using an electromagnetic wave having safe strength, and a deterioration detection system and method using the power supply system.SOLUTION: A power supply system comprises a mobile body 3 for originating an electromagnetic wave to a positionally fixed body 2 to be supplied with power, while moving through close positions apart from the body 2. The mobile body 3 includes: a plurality of power transmitters F that are arranged apart from each other forward and backward in the moving direction and originate electromagnetic waves; and a controller 5 for detecting the current position of the mobile body 3 to control origination and interruption of an electromagnetic wave of each power transmitter F. The controller 5 calculates positional relation between a known body 2 to be supplied with power and each power transmitter F from the current position and a position of the body 2 to be supplied with power; makes a power transmitter F close to the body 2 to be supplied with power originate an electromagnetic wave; and controls the power transmitters F so that sequential switching of power transmitter F for originating an electromagnetic wave is performed depending on movement of the mobile body 3.SELECTED DRAWING: Figure 2

【課題】移動する移動体から安全な強度の電磁波で位置が固定された被給電体に給電できる給電システムとこれを用いた劣化検出システム及び方法を提供する。【解決手段】位置が固定された被給電体２から間隔を隔てた近傍位置を移動しながら被給電体２に向けて電磁波を発信する移動体３を備える。移動体３は、移動方向の前後に互いに間隔を隔てて配置され電磁波を発信する複数の送電器Ｆと、移動体３の現在位置を検知し、各送電器Ｆの電磁波の発信及び切断を制御する制御器５と、を有する。制御器５は、現在位置と既知の被給電体２の位置とから被給電体２と各送電器Ｆとの位置関係を計算し、被給電体２に近接する送電器Ｆに電磁波を発信させ、移動体３の移動に合わせて電磁波の発信をする送電器Ｆを順次切り替えるように、送電器Ｆを制御する。【選択図】図２