PROBLEM TO BE SOLVED: To output highly accurate biological information.SOLUTION: A biological sensor 100 includes an electromagnetic wave irradiation part 10 for irradiating a living body surface with an electromagnetic wave, a reflection wave reception part 20 for receiving a reflection wave reflected on the living body surface, and acquiring an I signal and a Q signal, a frequency image generation part 81 for drawing a frequency distribution of the I signal and the Q signal received by the reflection wave reception part, an image differential calculation part 82 for differentiating the frequency distribution image, a differential intensity image calculation part 83 for calculating a differential intensity image based on the differentiated frequency distribution image, an edge calculation part 84 for calculating an edge of the differential intensity image, an offset calculation part 85 for calculating each normal line of a plurality of edges, calculating intersection points of the plurality of calculated normal lines, and calculating a center position of the intersection points from the plurality of calculated intersection points, and an external output part 70 for outputting biological information based on the I signal and the Q signal acquired by the reflection wave reception part, and the center position calculated by the offset calculation part.SELECTED DRAWING: Figure 2COPYRIGHT: (C)2018,JPO&INPIT【課題】 精度の高い生体情報を出力する。【解決手段】 生体表面に電磁波を照射する電磁波照射部10と、体表面で反射した反射波を受信しI信号とQ信号を取得する反射波受信部20と、IQ座標系において、反射波受信部が受信したI信号およびQ信号の度数分布を描画する度数画像生成部81と、度数分布画像を微分する画像微分演算部82と、微分した度数分布画像に基づいて、微分強度画像を演算する微分強度画像演算部83と、微分強度画像のエッジを演算するエッジ演算部84と、複数のエッジのそれぞれの法線を演算し、演算された複数の法線の交点を演算し、演算された複数の交点から交点の中心位置を演算するオフセット演算部85と、反射波受信部が取得したI信号およびQ信号、およびオフセット演算部が演算した中心位置に基づいて、生体情報を出力する外部出力部70と、を備える生体センサ100。【選択図】 図2
