公开(公告)号：US09588201B1

公开(公告)日：2017-03-07

申请号：US14154293

申请日：2014-01-14

Applicant: BAE Systems Information And Electronic Systems Integration Inc.

Inventor： Don A. Harris ,  Michael J. Bowers, II ,  Roland A. Gilbert ,  Tadd C. Kippeny

IPC: G01V3/00 ,  G01R33/44 ,  G01R33/36

CPC classification number: G01R33/441 ,  G01N24/084 ,  G01R33/34053 ,  G01R33/3607 ,  G01R33/3635

Abstract: A system and method for detecting at least one compound in a material under test (MUT) is presented. The system includes a Nuclear Quadrupole Resonance (NQR) frequency generator that generates an NQR frequency (fNQR) and propagates the fNQR frequency toward the MUT. A microwave frequency generator generates a microwave frequency (fmw) and propagates the fmw frequency toward the MUT. A RF output probe detects radio frequency (RF) emissions returned from the MUT. A detector detects the at least one compound based, at least in part, on whether the RF emissions returned from the MUT include any frequencies corresponding to fmw+/−(n×fNQR), where n is an integer of 2 or greater. In the preferred embodiment, n=2.

Abstract translation: 提出了一种用于检测待测材料（MUT）中的至少一种化合物的系统和方法。 该系统包括产生NQR频率（fNQR）的核四极共振（NQR）频率发生器，并将fNQR频率向MUT传播。 微波频率发生器产生微波频率（fmw）并将fmw频率向MUT传播。 RF输出探头检测从MUT返回的射频（RF）发射。 至少部分地基于从MUT返回的RF发射是否包括对应于fmw +/-（n×fNQR）的任何频率，其中n是2或更大的整数，检测器检测至少一种化合物。 在优选实施方案中，n = 2。

公开(公告)号：US09476953B1

公开(公告)日：2016-10-25

申请号：US13975877

申请日：2013-08-26

Applicant: BAE Systems Information And Electronic Systems Integration Inc.

Inventor： Paul A. Zank ,  David H. Herlihy ,  Eldon M. Sutphin ,  Roland A. Gilbert ,  Paul E. Gili

IPC: G01R33/36

CPC classification number: G01N24/084 ,  G01N24/10 ,  G01R33/3607 ,  G01R33/3621

Abstract: A system and method for detecting at least one material under test (MUT) is presented. A Nuclear Quadrupole Resonance (NQR) measurement system includes a waveform generator configured to generate a continuous wave (CW) input signal comprising one or more frequencies. An RF shielded chamber receives the at least one MUT that is carried by a person walking through the chamber. A probe within the chamber illuminates the MUT with the CW signal and simultaneously receives possible NQR emissions from the at least one MUT. A bridge circuit is utilized to cancel the strong excitation CW signal from the generator which would otherwise mask the weak NQR emissions from the MUT that are received and detected by the measurement system. A detector can then detect the MUT based, at least in part, on the resonance signal.

Abstract translation: 提出了一种用于检测至少一种待测材料（MUT）的系统和方法。 核四极共振（NQR）测量系统包括被配置为产生包括一个或多个频率的连续波（CW）输入信号的波形发生器。 RF屏蔽室接收由走过室的人携带的至少一个MUT。 室内的探头用CW信号照亮MUT，同时接收来自至少一个MUT的可能的NQR发射。 使用桥接电路来消除来自发生器的强激励CW信号，否则该信号将掩蔽来自测量系统接收和检测的MUT的弱NQR发射。 然后，检测器至少部分地基于谐振信号来检测MUT。