公开(公告)号：US20160047932A1

公开(公告)日：2016-02-18

申请号：US14782728

申请日：2014-04-03

Applicant: OSAKA UNIVERSITY

Inventor： Hideo AKABA ,  Hideo ITOZAKI ,  Junichiro SHINOHARA ,  Yuji MIYATO ,  Fumiya KATSUTANI

IPC: G01V3/02 ,  G01R29/08 ,  G01R29/22

CPC classification number: G01V3/02 ,  G01N29/2443 ,  G01R29/0814 ,  G01R29/0878 ,  G01R29/22 ,  G01V3/088

Abstract: Provided is a compact and lightweight electric field probe which has a transmitting/receiving function whereby piezoelectric crystals can be excited through the application of an alternating current electric field thereto, and piezoelectric effect signals can be detected with sufficient sensitivity. Also provided are a control system for the same, and a piezoelectric crystal detector. The electric near-field probe is provided with a capacitor, in which the space between two metal plates that are positioned parallel to each other is filled by a conductor or air, and a series resonance circuit, which has a prescribed resonance frequency and is connected in series to an inverter that is formed by winding a conductive wire around a toroidal core. The electric near-field probe is configured such that: an electric near-field, which originates from the leakage electric field from the capacitor generated by the application of alternating current voltage to the series resonance circuit, is transmitted to the piezoelectric crystals, and the piezoelectric crystals are excited; and the piezoelectric effect signal, which is generated by the excited piezoelectric crystals, is received by the capacitor, and is detected by the series resonance circuit. The control system is for said electric near-field probe.

Abstract translation: 提供一种具有发送/接收功能的紧凑且轻便的电场探针，由此可以通过施加交流电场来激发压电晶体，并且可以以足够的灵敏度检测压电效应信号。 还提供了一种用于其的控制系统和压电晶体检测器。 电近场探针设置有电容器，其中彼此平行定位的两个金属板之间的空间由导体或空气填充，并且串联谐振电路具有规定的谐振频率并被连接 与通过将导线围绕环形芯线缠绕而形成的逆变器串联连接。 电近场探头被配置为使得从源于通过施加交流电压而产生的电容器的串联谐振电路的泄漏电场产生的电近场被传输到压电晶体，并且 压电晶体激发; 并且由激发的压电晶体产生的压电效应信号由电容器接收，并由串联谐振电路检测。 控制系统用于所述电近场探头。

公开(公告)号：US20170299507A1

公开(公告)日：2017-10-19

申请号：US15516987

申请日：2015-10-07

Applicant: OSAKA UNIVERSITY

Inventor： Hideo ITOZAKI ,  Hideo AKABA

IPC: G01N21/359 ,  G08B7/06 ,  G01N21/3577 ,  G01N29/024 ,  G01N29/44 ,  G01N21/17

CPC classification number: G01N21/359 ,  G01N21/3577 ,  G01N29/024 ,  G01N29/4409 ,  G01N29/4427 ,  G01N29/4436 ,  G01N33/227 ,  G01N2021/1748 ,  G01N2201/13 ,  G01N2291/022 ,  G01V5/0008 ,  G08B7/06

Abstract: Provided is an examination technique that can quickly and reliably examine, from the outside of a container, whether a liquid which fills the container contains an explosive or the like, without being influenced by such things as the light transmissivity or size of the container, or the amount of liquid remaining in the container or the position of a label. In the present invention, a liquid examination device is formed by integrating the following: a near infrared-light examination device that examines whether a liquid which fills a container contains an explosive, an explosive raw material, and/or an illicit drug by projecting near infrared light into the liquid from outside of an optically transparent container, receiving the near infrared light which passed through the liquid or the near infrared light which was scattered by the liquid, and analyzing the absorption spectrum of such light; and an ultrasonic wave examination device that examines whether a liquid which fills a container contains an explosive, an explosive raw material, and/or an illicit drug by receiving the reflected waves of ultrasonic waves projected towards the liquid from outside of a metal container, and analyzing the ultrasonic wave speed of such waves.