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1. 发明授权

US06870791B1 Acoustic portal detection system 失效
标题翻译：声学门禁检测系统
公开(公告)号：US06870791B1
公开(公告)日：2005-03-22
申请号：US10328023
申请日：2002-12-26
申请人： David D. Caulfield , Michael Curran , Robert Tarini
发明人： David D. Caulfield , Michael Curran , Robert Tarini
IPC分类号： G01S15/00 , G01S15/04 , G01S15/66 , G03B42/06
CPC分类号： G01S15/003 , G01S15/04 , G01S15/66 , G03B42/06
摘要： Airports and other public places require security measures for the screening of human subjects for illicit objects and materials concealed from view beneath clothing. However, at present most of such screening processes involve only metal detectors, which are inherently incapable of detecting non-metallic illicit objects and materials. For this reason, there remains a strong need for novel systems and methods that can detect all types of materials. The present invention provides for a portal detection system that is configured for safe, rapid, and non-invasive scanning of human subjects. For this purpose, the portal detection system utilizes acoustic technology to achieve this end. The portal detection systems of the present invention may optionally be used in conjunction with conventional metal detection means. The invention encompasses portal detection systems, their use in scanning human subjects, and corresponding methods of scanning human subjects for illicit objects and substances.
摘要翻译：机场和其他公共场所需要采取安全措施，对人类受试者进行掩护，从衣物下方隐藏的非法物品和材料。然而，目前大多数这种筛选过程仅涉及金属检测器，其本身不能检测非金属非法物品和材料。因此，仍然强烈需要可以检测所有类型的材料的新型系统和方法。本发明提供一种门禁检测系统，其被配置用于人类对象的安全，快速和非侵入式扫描。为此，门户检测系统利用声学技术实现这一目的。本发明的门诊检测系统可以任选地与传统的金属检测装置结合使用。本发明包括门户检测系统，它们在扫描人类对象中的用途以及扫描人类受试者的非法物品和物质的相应方法。

2. 发明授权

US06545945B2 Material classification apparatus and method 失效
公开(公告)号：US06545945B2
公开(公告)日：2003-04-08
申请号：US09791671
申请日：2001-02-26
申请人： David D. Caulfield
发明人： David D. Caulfield
IPC分类号： G01S1500
CPC分类号： G01N29/4436 , G01N29/348 , G01N29/4418 , G01N29/4445 , G01S13/887 , G01V1/001 , G01V3/12
摘要： The present invention provides signification improvements over the apparatus and method disclosed by U.S. Pat. No. 4,922,467. The invention provides an apparatus for material classification and substance identification of an object contained within an enclosure, or buried beneath the ground. The improvements to the present invention include the use of a source of either electromagnetic or acoustic energy, and electromagnetic or acoustic energy receivers, as appropriate. In addition, the present invention discloses the use of energy pulses of differing frequencies, such that the signal processor can compute the rate of change of energy absorption of the substance, as a function of frequency (d&agr;/df). In this way, the apparatus permits the formulation of a highly detailed and accurate object signature, which can be compared with a database of known object signatures for exact substance identification.

3. 发明授权

US4922467A Acoustic detection apparatus 失效
标题翻译：声学检测装置
公开(公告)号：US4922467A
公开(公告)日：1990-05-01
申请号：US327720
申请日：1989-03-23
申请人： David D. Caulfield
发明人： David D. Caulfield
IPC分类号： G01V1/00
CPC分类号： G01V1/001
摘要： The present invention relates to an apparatus for use in detecting the substance of an object contained within an enclosure. The apparatus is comprised of an acoustic transmitter for transmitting a pulse of acoustic energy at a first side of the enclosure. A first acoustic receiver is provided for receiving acoustic energy reflected from the object to produce a reflected acoustic energy signal. A second acoustic receiver is provided for receiving acoustic energy which has been transmitted or refracted through the object to produce a transmitted acoustic energy signal. A signal processor is connected to the transmitter and to said first and second receivers. The signal processor processes the transmitted pulse of acoustic energy, the reflected acoustic energy signal and the transmitted acoustic energy signal to produce an object signature indicative of the object. A comparator is provided for comparing the object signature with the signature of known objects to determine the substance of the object. In accordance with the present invention, "enclosure" is defined as being a hollow box like structure having an object to be detected and identified with respect to its substance located therein, for example, a suitcase containing and object, or a quantity of material having an object to be detected and identified with respect to its substance buried therein, for example, an object buried in the earth relatively close to the surface.
摘要翻译：本发明涉及一种用于检测包含在外壳内的物体的物质的装置。该装置包括用于在外壳的第一侧传输声能脉冲的声发射器。提供第一声接收器用于接收从物体反射的声能以产生反射的声能信号。提供第二声接收器用于接收已经通过物体传输或折射的声能，以产生传输的声能信号。信号处理器连接到发射机和所述第一和第二接收机。信号处理器处理发射的声能脉冲，反射的声能信号和传输的声能信号，以产生指示对象的对象签名。提供比较器，用于将对象签名与已知对象的签名进行比较，以确定对象的实质。根据本发明，“外壳”被定义为具有中空盒状结构，其具有关于其位于其中的物质被检测和识别的物体，例如包含物体的手提箱或一定量的具有相对于其埋藏在其中的物质，例如埋在地球中的物体相对靠近表面而被检测和识别的物体。

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