公开(公告)号：US10031246B2

公开(公告)日：2018-07-24

申请号：US13920570

申请日：2013-06-18

Applicant: U.S. Army Research Laboratory ATTN: RDRL-LOC-I

Inventor： Weimin Zhou ,  Olukayode Okusaga ,  James P Cahill

IPC: G01H9/00 ,  G01V1/18 ,  G01S7/521 ,  G01S15/02

Abstract: A method and system comprising: an optoelectronic oscillator comprising a light generator, a modulator, and at least one optical fiber, the optoelectronic oscillator operating to send a modulated carrier signal through the optical fiber into a target area and receive the return signal; a circuit for removal of the carrier frequency operatively connected to the oscillator comprising at least one phase shifter; at least one mixer operatively connected to the at least one phase shifter; at least control circuit operatively connected the at least one mixer and the at least one phase shifter for controlling the phase shifter and operating to cancel signals other than the sideband signals; a signal processor for processing the sideband signals to detect acoustical and/or vibrational signals from the target area. The method comprises sensing vibrational and/or acoustical signals for detection of acoustical and/or vibrational signals in the target area.

公开(公告)号：US20140130601A1

公开(公告)日：2014-05-15

申请号：US13920570

申请日：2013-06-18

Applicant: U.S. Army Research Laboratory ATTN: RDRL-LOC-I

Inventor： Weimin Zhou ,  Olukayode Okusaga ,  James P Cahill

IPC: G01N29/24

CPC classification number: G01V1/18 ,  G01H9/004 ,  G01S7/521 ,  G01S15/02

Abstract: A method and system comprising: an optoelectronic oscillator comprising a light generator, a modulator, and at least one optical fiber, the optoelectronic oscillator operating to send a modulated carrier signal through the optical fiber into a target area and receive the return signal; a circuit for removal of the carrier frequency operatively connected to the oscillator comprising at least one phase shifter; at least one mixer operatively connected to the at least one phase shifter; at least control circuit operatively connected the at least one mixer and the at least one phase shifter for controlling the phase shifter and operating to cancel signals other than the sideband signals; a signal processor for processing the sideband signals to detect acoustical and/or vibrational signals from the target area. The method comprises sensing vibrational and/or acoustical signals for detection of acoustical and/or vibrational signals in the target area.

Abstract translation: 一种方法和系统，包括：光电子振荡器，包括光发生器，调制器和至少一个光纤，所述光电子振荡器用于将调制的载波信号通过所述光纤发送到目标区域并接收所述返回信号; 用于去除可操作地连接到包括至少一个移相器的振荡器的载波频率的电路; 至少一个混合器，可操作地连接到所述至少一个移相器; 至少控制电路可操作地连接至少一个混频器和至少一个移相器，用于控制移相器并操作以消除除边带信号之外的信号; 用于处理边带信号以从目标区域检测声学和/或振动信号的信号处理器。 该方法包括感测用于检测目标区域中的声学和/或振动信号的振动和/或声学信号。