PROBLEM TO BE SOLVED: To provide a biological signal detector which has an extremely simple configuration, which detects low-frequency vibrations of a detection object, such as pulses of the human body, in a non-contact manner, and which properly removes noises.SOLUTION: Noise removal of an electric field-type sensor can be achieved by subtracting a frequency component of a Doppler sensor from a real-part data row subjected to fast Fourier transform, by using an output signal of the Doppler sensor for an output signal of the electric field-type sensor susceptible to the noises because sensitivity for a distance is low.SELECTED DRAWING: Figure 2COPYRIGHT: (C)2017,JPO&INPIT【課題】極めて簡易な構成で、人体の脈拍等、検出対象の低周波振動を非接触にて、且つ適切にノイズを除去した生体信号検出装置を提供する。【解決手段】距離に対する感度が低いためにノイズの影響を受けやすい電界型センサの出力信号に対し、ドップラーセンサの出力信号を用いて、高速フーリエ変換した実部データ列からドップラーセンサの周波数成分を差し引くことで、電界型センサのノイズ除去を実現できる。【選択図】図2
