Title:
GAS DETECTION SYSTEM
Document Type and Number:
WIPO Patent Application WO/2017/090516
Kind Code:
A1
Abstract:
In order to perform gas detection at multiple locations with a simple configuration and at a low cost, this gas detection device is provided with: transmission means for outputting to a transmission path, as a first light signal, pulse light that has a temporally changing wavelength and that is generated by pulse light modulated by a light wavelength modulator; and reception means for receiving a second light signal output from a sensor head outputting the first light signal propagated through the atmosphere as the second light signal, converting the received the second light signal into an electric signal, detecting, by each sensor head, a predetermined type of gas contained in the atmosphere based on a temporal change in amplitude of the electric signal, and outputting a result of detection of the gas.
Inventors:
TANAKA AKIHIRO (JP)
Application Number:
PCT/JP2016/084194
Publication Date:
June 01, 2017
Filing Date:
November 18, 2016
Export Citation:
Assignee:
NEC CORP (JP)
International Classes:
G01N21/3504; G01N21/39
Foreign References:
| JPH0510879A | 1993-01-19 | |||
| JP2007033049A | 2007-02-08 | |||
| JP2008298637A | 2008-12-11 | |||
| JP2015114259A | 2015-06-22 | |||
| JP2007240248A | 2007-09-20 | |||
| JPH034147A | 1991-01-10 | |||
| JPS577514A | 1982-01-14 | |||
| US20130271769A1 | 2013-10-17 |
Attorney, Agent or Firm:
SHIMOSAKA Naoki (JP)
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