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1. 发明授权

US06234021B1 Enhanced detection of vibration 有权
标题翻译：增强振动检测
公开(公告)号：US06234021B1
公开(公告)日：2001-05-22
申请号：US09243324
申请日：1999-02-02
申请人： Kenneth R. Piety , James C. Robinson , William S. Johnson , James Brent Vanvoorhis
发明人： Kenneth R. Piety , James C. Robinson , William S. Johnson , James Brent Vanvoorhis
IPC分类号： G01H1700
CPC分类号： G01N29/42 , G01H1/00 , G01H3/00 , G01H3/10 , G01N29/14 , G01N29/348 , G01N2291/015 , G01N2291/02872 , G01N2291/2698 , G01V1/001 , G10K11/24
摘要： A device detects an emission source of a vibration signal against a background of noise, where the vibration signal is produced by a mechanical system and has one or more frequency components. A sensor senses the vibration signal and produces a sensor signal corresponding to the vibration signal. The sensor has a mechanical frequency selection structure for mechanically resonating at desired frequencies and for mechanically attenuating a frequency component of the vibration signal having a frequency outside the desired frequencies. The mechanical frequency selection structure thus produces a mechanically-tuned sensor signal. Electrical frequency selection filters electrically attenuate a frequency component of the mechanically-tuned sensor signal having a frequency outside the desired frequencies. The electrical frequency selection filters thus produce an electrically-tuned sensor signal. The device has at least one amplifier with gain for producing an amplified signal corresponding to the electrically-tuned sensor signal. An amplitude characteristic determination circuit determines an amplitude characteristic corresponding to the vibration signal's amplitude. The amplitude characteristic determination circuit also generates an amplitude indication based on the amplitude characteristic. The amplitude indication and adjusts the gain of the amplifier based at least in part on the amplitude indication.
摘要翻译：一种装置根据噪声背景检测振动信号的发射源，其中振动信号由机械系统产生并具有一个或多个频率分量。传感器感测振动信号并产生对应于振动信号的传感器信号。传感器具有机械频率选择结构，用于以期望的频率机械谐振，并机械地衰减具有期望频率之外的频率的振动信号的频率分量。因此，机械频率选择结构产生机械调谐的传感器信号。电频率选择滤波器对具有在期望频率之外的频率的机械调谐的传感器信号的频率分量进行电衰减。因此，电频率选择滤波器产生电调谐的传感器信号。该装置具有至少一个具有增益的放大器，用于产生对应于电调谐传感器信号的放大信号。振幅特性确定电路确定对应于振动信号振幅的振幅特性。幅度特性确定电路还基于振幅特性产生振幅指示。振幅指示并且至少部分地基于振幅指示来调节放大器的增益。

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