PROBLEM TO BE SOLVED: To enable a measurement object in a short distance to be sensed at low cost with high accuracy and high speed.SOLUTION: A sensor device of the present invention comprises: a control unit for causing a transmit signal of a first frequency band to be intermittently transmitted from a transmission/reception device toward a measurement object； a filter unit to which a receive signal of a second frequency band lower than the frequency of the first frequency band is inputted via the transmission/reception device, the receive signal of a second frequency band generated on the basis of a reflected wave of the first frequency band from the measurement object, the filter unit extracting a signal of a specific frequency band having had its noise component reduced from the receive signal of the second frequency band； a frequency conversion unit for converting the signal of the specific frequency band to a signal of a third frequency band higher than the frequency of the second frequency band； and a distance calculation unit for calculating the distance to the measurement object on the basis of the wavenumber of the signal of the third frequency band that is detected during a period in which the transmit signal is turned off.SELECTED DRAWING: Figure 1COPYRIGHT: (C)2018,JPO&INPIT【課題】近距離の測定対象物を低コスト、高精度、かつ高速にセンシングすることができるようにする。【解決手段】本発明のセンサ装置は、第１の周波数帯域の送信信号を送受信装置から測定対象物に向けて間欠的に送信させる制御部と、測定対象物からの第１の周波数帯域の反射波に基づいて生成された第１の周波数帯域よりも周波数の低い第２の周波数帯域の受信信号が送受信装置を介して入力され、第２の周波数帯域の受信信号からノイズ成分の低減された特定周波数帯域の信号を抽出するフィルタ部と、特定周波数帯域の信号を、第２の周波数帯域よりも周波数の高い第３の周波数帯域の信号に変換する周波数変換部と、送信信号がオフされている期間に検出される第３の周波数帯域の信号の波数に基づいて、測定対象物までの距離を算出する距離算出部とを備える。【選択図】図１
