| 摘要 |
PURPOSE:To search an active homing sailing body by providing a device which receives the transmission frequency band of the active homing sailing body and performs frequency analysis and amplitude detection of this received signal to detect a transmission signal of the active homing sailing body. CONSTITUTION:A frequency analyzer 3 analyzes the frequency of the output of a BPF2, which is received through an output line 201, and transmits analysis information to an output line 301. When receiving the output of the BPF2, an amplitude detector 4 detects the level and the period of each received signal and transmits them as amplitude detection data to an output line 401. In a detection decider 5, a preliminarily set reference value concerning the active homing sailing body is used as the discrimination threshold to perform the discrimination processing on a basis of data supplied through output lines 301 and 401 by an analysis frequency discriminating circuit 51, a detected amplitude discriminating circuit 52, and an overall decision circuit 53, and the transmission signal of the sailing body is detected from received signals. Thus, the active homing sailing body is detected. |
