| 摘要 |
PROBLEM TO BE SOLVED: To provide an object detection sensor configured to be less influenced by noise.SOLUTION: An object detection sensor includes a transmission line, an oscillator connected to the transmission line, a variable load connected to the transmission line and configured to change its own impedance, an antenna connected to the transmission line, and a signal detector connected to the transmission line. A high-frequency signal input by the oscillator to the transmission line is transmitted to the variable load and the antenna. The variable load reflects the high-frequency signal. The antenna transmits the high-frequency signal input from the transmission line to the antenna as a radio signal, and inputs the radio signal received by the antenna to the transmission line, as a high-frequency signal. The high-frequency signal reflected by the variable load and the high-frequency signal input by the antenna to the transmission line are transmitted to the signal detector by the transmission line. |
