PROBLEM TO BE SOLVED: To suppress a harmonic component of a frequency component derived from a breath in a detection signal of a radio wave sensor and improve detection accuracy of a heartbeat component.SOLUTION: A sensor information processing device applies a filter for blocking at least a harmonic component of a frequency component derived from a breath of a person to be observed to a detection signal of the radio wave sensor 21 and detects a heartbeat component of the person to be observed from a signal passing through the filter.SELECTED DRAWING: Figure 7【課題】電波センサの検出信号において、呼吸由来の周波数成分の高調波成分を抑圧して、心拍成分の検出精度を向上する。【解決手段】電波センサ２１の検出信号に、被観測者の呼吸由来の周波数成分の高調波成分を少なくとも遮断するフィルタを適用し、フィルタを通過した信号において、被観測者の心拍成分を検出する。【選択図】図７
