環境情報計測装置、環境情報計測システム、及び環境情報計測方法

Japanese Patent JP5697233

B2

An environmental information measurement device includes: a power source unit; an environmental information detector; a timer; and a controller. The power source unit generates, from an electromagnetic wave received, a power source voltage to be supplied to a load. The load includes the environmental information detector, the timer, and the controller. The environmental information detector includes a detector including a circuit element having an impedance or an electrostatic capacitance that varies according to a physical amount detected under an environment at a measurement target point, and outputs a signal that varies according to a response characteristic of the detector. The timer measures a duration from the time when measurement is initiated to the time when a voltage of the signal becomes a predetermined detection voltage. The controller controls an operation of the environmental information detector.

Hiroshi Waki
Igarashi Hajime
Kota Watanabe
Makimura Hidetoshi

JP2010208452A

April 08, 2015

September 16, 2010

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East Japan Railway Company
National University Corporation Hokkaido University

G01D21/00; G01K1/02; G08C15/00; G08C17/00; H04Q9/00

JP200434931A
JP200524441A
JP2005106555A
JP2006162572A
JP962808A

Masatake Shiga
Tadashi Takahashi
Takashi Watanabe
Suzuki Mitsuyoshi
Kazuya Nishi
Yasuhiko Murayama

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