PROBLEM TO BE SOLVED: To realize a device which detects fine movements of a moving body in a non-contact manner.SOLUTION: In a movement detection device, a radiator 7 comprises a transmission antenna 13 which radiates a microwave, and a phase difference detector 2 comprises reception antennas 20A and B which receive the microwave. Due to change in a multipath caused by movements of fingertips of a hand placed between the transmission antenna 13 and the reception antennas 20A and B, a phase difference is generated in signals received by the reception antennas 20A and B. The phase difference detector 2 detects movements of fingertips of a hand by detecting the phase difference. The movement detection device of an embodiment 1 has high resolution for the reason that the movement detection device can detect the phase difference even when multipath change caused by fine movements is minute because the phase difference has a large value due to the microwave. Also, as the movement detection device of the embodiment 1 detects movements in non-contact manner by using the microwave, it is possible to cover and hide the movement detection device with a material such as cloth or plastic so that the movement detection device can perform movement detection without spoiling unity of design of its surroundings.COPYRIGHT: (C)2014,JPO&INPIT【課題】動体の細かい動きを非接触で検出する装置を実現すること。【解決手段】放射器7はマイクロ波を放射する送信アンテナ13を有し、位相差検出器2はマイクロ波を受信する受信アンテナ20A、Bを有している。送信アンテナ13と受信アンテナ20A、B間に位置した手の指先の動きによるマルチパスの変化で、受信アンテナ20A、Bで受信する信号に位相差が生じる。位相差検出器2はその位相差を検出することで、手の指先の動きを検出する。実施例1の動作検出装置が高分解能である理由は、細かい動きによる微小なマルチパスの変化であっても、マイクロ波を用いているため位相差は大きな値であり、【選択図】図1
