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Title:
VOLTAGE DETECTOR AND VOLTAGE DETECTION METHOD
Document Type and Number:
WIPO Patent Application WO/2018/021410
Kind Code:
A1
Abstract:
The present invention is capable of detecting the presence of voltage of a detection object without the need of grounding, and suppressing detection accuracy due to electromagnetic waves and electrification of a detector. This voltage detector is for detecting the presence of voltage of a detection object by disposing a conductor oppositely to the detection object, wherein an AC voltage in accordance with the voltage of the detection object is generated in the conductor, by vibrating the conductor with sound waves so as to vary the capacitance formed between the conductor, and the ground and the detection object.

Inventors:
TAKAHASHI Masatoshi (6-6, Marunouchi 1-chome, Chiyoda-k, Tokyo 80, 〒1008280, JP)
NISHIO Ko (6-6, Marunouchi 1-chome, Chiyoda-k, Tokyo 80, 〒1008280, JP)
NAGASAKI Fumihiko (6-6, Marunouchi 1-chome, Chiyoda-k, Tokyo 80, 〒1008280, JP)
SHIMIZU Shintaro (6-6, Marunouchi 1-chome, Chiyoda-k, Tokyo 80, 〒1008280, JP)
YAMADA Souhei (Yoyogi 2-chome Shibuya-k, Tokyo 78, 〒1518578, JP)
KISHI Toshihide (Yoyogi 2-chome Shibuya-k, Tokyo 78, 〒1518578, JP)
YAMAMOTO Hiroshi (Yoyogi 2-chome Shibuya-k, Tokyo 78, 〒1518578, JP)
Application Number:
JP2017/027054
Publication Date:
February 01, 2018
Filing Date:
July 26, 2017
Export Citation:
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Assignee:
HITACHI, LTD. (6-6 Marunouchi 1-chome, Chiyoda-ku Tokyo, 80, 〒1008280, JP)
EAST JAPAN RAILWAY COMPANY (2-2 Yoyogi 2-chome, Shibuya-ku Tokyo, 78, 〒1518578, JP)
International Classes:
G01R19/155; B61L1/20
Attorney, Agent or Firm:
SEIRYO I.P.C. (24-2, Hatchobori 2-chome Chuo-k, Tokyo 32, 〒1040032, JP)
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