| 摘要 |
PROBLEM TO BE SOLVED: To provide an object detection sensor with which it is possible to accurately detect an object such as a human body in a narrow space such as in a private room.SOLUTION: Frequency spectrum generation means (17, 18) generates the frequency spectrum of a beat signal. The frequency spectrum is such that the frequency of the frequency spectrum and a path length from when a transmission wave is transmitted to when it is received as a received wave have a correspondence relation. Object detection means (21) detects an object (10) in a room (2) on the basis of spectrum distribution in a frequency range including a frequency that corresponds to a path length longer than twice the maximum width of the room (2).SELECTED DRAWING: Figure 2 |
