| 摘要 |
<p>PURPOSE:To obtain a proximity fuse having a function of controlling a time from detection of a target to triggering of a nose by independently controlling a delay time in response to detecting range and optimizing the triggering timing of the nose. CONSTITUTION:A transmission signal is modulated by a modulator 3 by an output of a first bit delay circuit 11a, delayed by one bit from the output of a code generator 9, and transmitted. A reflected wave from a target is homodyne-detected by a mixer 6, amplified by a video amplifier 7, and a correlation is obtained in the same code as that of the transmission signal by first fourth correlators 10a-10d. However, since the first correlator 10a provides a correlation with the code of a phase advanced by one bit from the transmission signal, its output is generated as a signal in which a receiver noise and a disturbance signal are reversely diffused. After this signal is passed through a first Doppler filter 12a and a first detector 13a, a constant bias is added to it by a bias adder 14 to set an additive threshold responsive to a radio wave environment in and out of a proximity fuse.</p> |
