发明名称 |
Acoustic amplitude-doppler target ranging system |
摘要 |
An acoustic target sensor and ranging system automatically detects military targets and provides a munition firing signal at the appropriate target position and time. An amplitude-doppler circuit is utilized to predict the time of closest approach to a munition by a target by measuring the time interval between zero crossings of the second and third derivatives of the received acoustic wave amplitude function. The circuit produces a firing signal by logically ANDing the closest point of approach signal it develops with a signal that indicates when target range is within specified limits. The circuit is realized by means of conventional electronic zero crossing detectors, an up-down counter, dividers, sample and hold devices and voltage comparators. The acoustic target signal is obtained from an omni-directional microphone the output of which is amplified and rectified.
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申请公布号 |
US4409899(A) |
申请公布日期 |
1983.10.18 |
申请号 |
US19810286819 |
申请日期 |
1981.07.27 |
申请人 |
THE UNITED STATES OF AMERICA AS REPRESENTED BY THE SECRETARY OF THE AIR FORCE |
发明人 |
OWEN, THOMAS E.;SUHLER, SIDNEY A.;PETERS, WENDELL R. |
分类号 |
F42C13/06;G01S11/16;(IPC1-7):F42C13/06 |
主分类号 |
F42C13/06 |
代理机构 |
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