| 摘要 |
PROBLEM TO BE SOLVED: To provide a target detector capable of reducing alarm error probability when a target is detected, and accurately calculating a target azimuth, a target distance, and a target speed. SOLUTION: The target detector comprises a transducer 12 for receiving a wave signal from a target to which wave is radiated with a predetermined period, a device 14 for forming a plurality of directional beams including a split beam from a received signal, a target detection processing device 15 that converts the output signal of each of the plurality of taken directional beams into a frequency region and determines the target using a level threshold and azimuth dispersion threshold from a signal level and signal azimuth corresponding to each frequency on the obtained frequency region, and a device 16 for calculating a distance to the target on the basis of the time from wave radiation to arrival of the wave signal after target determination and calculating the target speed of the detected target from the target azimuth, target distance, and the predetermined period of the same detected target obtained by previous and present transmissions in the predetermined period. COPYRIGHT: (C)2007,JPO&INPIT
|
