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Title:
SEWER MONITORING SYSTEM AND METHOD FOR IMPLEMENTING SAME
Document Type and Number:
WIPO Patent Application WO/2019/022084
Kind Code:
A1
Abstract:
The present invention comprises: an optical fiber (1) disposed in a pipe (P) having a sewage flow path through which sewage (W) flows, the optical fiber (1) being disposed so as to extend axially in a portion of the sewage flow path positioned above a preset normal water level; and a photodetector (2) that operates according to a timed main scheme, the photodetector (2) having a light transmitter (21) that transmits pulse light within the optical fiber (1) and a light detector (22) that detects scattered light generated within the optical fiber (1) due to a change in the environment outside the optical fiber (1).

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Inventors:
FUJITA KEIICHI (JP)
OHI NAOYUKI (JP)
OGAWA KEN (JP)
TSUCHIYA MUNENORI (JP)
Application Number:
PCT/JP2018/027730
Publication Date:
January 31, 2019
Filing Date:
July 24, 2018
Export Citation:
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Assignee:
NAGANO KEIKI CO LTD (JP)
International Classes:
G01D5/353; G01H3/00; G01H9/00; G01H17/00; G01B11/16
Foreign References:
JP2005345376A2005-12-15
JP2001084268A2001-03-30
JP2002318333A2002-10-31
JP2003304615A2003-10-24
JP2005346105A2005-12-15
JP2016166839A2016-09-15
JP2006183457A2006-07-13
JP2011128791A2011-06-30
US20130021874A12013-01-24
Attorney, Agent or Firm:
KINOSHITA & ASSOCIATES (JP)
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