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Patent Searching and Data


Title:
ELECTRIC NEAR-FIELD PROBE, CONTROL SYSTEM FOR SAME, AND PIEZOELECTRIC CRYSTAL DETECTOR
Document Type and Number:
WIPO Patent Application WO/2014/171342
Kind Code:
A1
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.

Inventors:
AKABA HIDEO (JP)
ITOZAKI HIDEO (JP)
SHINOHARA JUNICHIRO (JP)
MIYATO YUJI (JP)
KATSUTANI FUMIYA (JP)
Application Number:
PCT/JP2014/059820
Publication Date:
October 23, 2014
Filing Date:
April 03, 2014
Export Citation:
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Assignee:
UNIV OSAKA (JP)
International Classes:
G01R29/08; G01N27/02; G01R29/22
Foreign References:
JPS62230115A1987-10-08
JP2011069630A2011-04-07
JP2001159648A2001-06-12
US7132942B12006-11-07
Other References:
See also references of EP 2990813A4
T.RAYNER ET AL., NARCOTICS DETECTION USING PIEZOELECTRIC RINGING, THE INTERNATIONAL SOCIETY FOR OPTICS AND PHOTONICS PROC., vol. 2936, 1997, pages 31 - 38
Attorney, Agent or Firm:
JODAI, Tetsuji et al. (JP)
Tetsuji Ueshiro (JP)
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