公开(公告)号：US06924895B2

公开(公告)日：2005-08-02

申请号：US10632307

申请日：2003-08-01

申请人： Joseph Lawrence Chovan ,  Martin Francis Lowry ,  Evelyn Hope Monsay ,  William Arthur Penn ,  William Pattee Whyland ,  Lawrence Richard Snowman

发明人： Joseph Lawrence Chovan ,  Martin Francis Lowry ,  Evelyn Hope Monsay ,  William Arthur Penn ,  William Pattee Whyland ,  Lawrence Richard Snowman

IPC分类号： G01B9/02 ,  G08B13/16 ,  G08B13/187 ,  G01N29/04

CPC分类号： G01H9/00 ,  G01B9/02002 ,  G01B9/02024 ,  G01N2291/02872 ,  G08B13/1609 ,  G08B13/187

摘要： The present invention relates to an optical sensor of air borne acoustic waves. The sensor comprises means for producing mutually coherent optical sampling and reference beams, which may be combined to form an intermediate frequency carrier, the sampling beam being exposed to the acoustic field, in which acoustic wave induced density variations occur. These density variations produce a variation in the index of refraction and thereupon a phase modulation of the sampling beam. This phase modulation may be recovered by an optical detector and a phase detector as an electrical signal representative of the acoustic signal.The invention has application to security systems.

摘要翻译： 本发明涉及一种空气声波的光学传感器。 该传感器包括用于产生相互相干的光采样和参考光束的装置，其可以被组合以形成中频载波，采样光束暴露于声波引起的密度变化的声场。 这些密度变化导致折射率的变化，并且随后采样光束的相位调制。 该相位调制可以由光学检测器和相位检测器作为代表声学信号的电信号来恢复。 本发明适用于安全系统。

公开(公告)号：US06714306B1

公开(公告)日：2004-03-30

申请号：US06864481

申请日：1986-05-19

申请人： Joseph Lawrence Chovan ,  Martin Francis Lowry ,  Evelyn Hope Monsay ,  William Arthur Penn ,  William Pattee Whyland ,  Lawrence Richard Snowman

发明人： Joseph Lawrence Chovan ,  Martin Francis Lowry ,  Evelyn Hope Monsay ,  William Arthur Penn ,  William Pattee Whyland ,  Lawrence Richard Snowman

IPC分类号： G01B902

CPC分类号： G01H9/00 ,  G01B9/02002 ,  G01B9/02024 ,  G01N2291/02872 ,  G08B13/1609 ,  G08B13/187

摘要： The present invention relates to an optical sensor of air borne acoustic waves. The sensor comprises means for producing mutually coherent optical sampling and reference beams, which may be combined to form an intermediate frequency carrier, the sampling beam being exposed to the acoustic field, in which acoustic wave induced density variations occur. These density variations produce a variation in the index of refraction and thereupon a phase modulation of the sampling beam. This phase modulation may be recovered by an optical detector and a phase detector as an electrical signal representative of the acoustic signal. The invention has application to security systems.

摘要翻译： 本发明涉及一种空气声波的光学传感器。 该传感器包括用于产生相互相干的光采样和参考光束的装置，其可以被组合以形成中频载波，采样光束暴露于声波引起的密度变化的声场。 这些密度变化导致折射率的变化，并且随后采样光束的相位调制。 该相位调制可以由光学检测器和相位检测器作为代表声学信号的电信号来恢复。本发明适用于安全系统。