OPTICAL FIBER RELAY APPARATUS AND SEWERAGE PIPE COMMUNICATION SYSTEM

WIPO Patent Application WO/2017/221534

A1

Provided are an optical fiber relay apparatus and a sewerage pipe communication system that allow multiple types of sensors to measure sensing data even under an environment of no power supply in a sewerage pipe. An optical fiber relay apparatus located in a sewerage pipe and connected by use of a multiple-core optical fiber cable comprises: an optical termination unit for extracting a particular optical fiber from the multiple-core optical fiber cable; an optical power reception unit; an optical connector; and an electric connector, the optical fiber relay apparatus being characterized in that the optical power reception unit obtains, as a driving power, a power by use of light from the optical fiber, converts signals from the electric connector to optical signals and sends the optical signals to the optical fiber, thereby transmitting/receiving the optical signals by use of the optical fiber provided between the optical connector and the optical termination unit, wherein the optical fiber is fusion-spliced in the optical termination unit.

JP2000148038	MATRIX TYPE DISPLAY DEVICE
JP2005072376	CONTROL CIRCUIT OF AVALANCHE PHOTODIODE
JPH01303821	POWER SOURCE CONTROL SYSTEM FOR OPTICAL COMMUNICATION SYSTEM

TADOKORO HIDEYUKI (JP)
HATAYAMA MASAYOSHI (JP)
TAKANO HIDEAKI (JP)
KAWAKAMI HIROYUKI (JP)
NETTA TAKASHI (JP)
MIURA HARUYOSHI (JP)
FUJIHIRA TADAYOSHI (JP)

PCT/JP2017/015700

December 28, 2017

April 19, 2017

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HITACHI LTD (JP)
TOKYO METRO SEWERAGE SERV CORP (JP)

H04B10/80; E03F7/00; H04B10/27

JP2003234708A	2003-08-22
JPH06244798A	1994-09-02
JPS57121794A	1982-07-29
JP2008021292A	2008-01-31

POLAIRE I.P.C. (JP)

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