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1. 发明授权

US3696369A Signal processor 失效
标题翻译：信号处理器
公开(公告)号：US3696369A
公开(公告)日：1972-10-03
申请号：US3696369D
申请日：1970-12-02
申请人： SYLVANIA ELECTRIC PROD
发明人： LAYMON MARVIN D , MCCOY JEROME D , SCHEWE MILLARD F
IPC分类号： G08B13/16 , G08B13/00
CPC分类号： G08B13/1663
摘要： Seismic vibrations sensed by a geophone in a protected area are converted to an electrical seismic signal that is applied to an envelope detector. The detected signal is coupled directly and through an integrator which inverts the polarity thereof to a summing network. The zero crossings of the seismic signal are detected to generate a train of pulses that are integrated to produce a signal having an amplitude that is related to the fundamental frequency of the seismic signal and of the opposite polarity with respect to the detected signal and which is applied to the summing network. The output of the summing network is applied to a threshold circuit which produces an alarm indicating intrusion of the protected area when the magnitude of the sum signal exceeds a prescribed threshold level.
摘要翻译：被保护区域中的地震检波器感测的地震振动被转换为施加到包络检测器的电气地震信号。检测到的信号直接耦合并通过将其极性反转到求和网络的积分器耦合。检测地震信号的过零点以产生一系列脉冲，其被积分以产生具有与地震信号的基频相关的幅度并且相对于检测到的信号具有相反极性的幅度的信号，应用于求和网络。求和网络的输出被应用于阈值电路，该阈值电路当和信号的幅度超过规定的阈值电平时产生指示受保护区域的入侵的警报。

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