Title:
WATER LEAKAGE MONITORING SYSTEM
Document Type and Number:
WIPO Patent Application WO/2008/029681
Kind Code:
A1
Abstract:
A water leakage monitoring system having a monitoring device (12) and a water leakage
position estimation device (13), in which the monitoring device (12) collects
and stores data on flowrate and pressure obtained from pressure meters (6a, 6b)
and a flowrate meter (5) that are arranged in each water distribution block. The
water leakage position estimation section (13) has cycle data acquisition means
(21) for taking out data on flowrate and pressure that are obtained at a predetermined cycle
and are stored in the monitoring device and taking out signals relating to variations
in flowrate and pressure that suggest water leakage; means (22) for calculating,
based on signals relating to variations in two pressures, a pressure reaction
time difference; means (23) for estimating the speed of pressure propagation
by using the pressure reaction time difference and the distance between two pressure
meters in a water distribution block defined in pipeline network map data; and
means (24) for estimating, upon receiving the signal relating to variation in
flowrate, the position of flowrate variation by using the pressure propagation
speed and the installation positions of the flowrate meter and pressure meter
in the pipeline network map data.
Inventors:
YUKAWA ATSUSHI (JP)
YOKOKAWA KATSUYA (JP)
OISHI NAOTO (JP)
YOKOKAWA KATSUYA (JP)
OISHI NAOTO (JP)
Application Number:
PCT/JP2007/066737
Publication Date:
March 13, 2008
Filing Date:
August 29, 2007
Export Citation:
Assignee:
TOSHIBA KK (JP)
CITY OF KITAKYUSYU (JP)
YUKAWA ATSUSHI (JP)
YOKOKAWA KATSUYA (JP)
OISHI NAOTO (JP)
CITY OF KITAKYUSYU (JP)
YUKAWA ATSUSHI (JP)
YOKOKAWA KATSUYA (JP)
OISHI NAOTO (JP)
International Classes:
G01M3/28; G01M3/04
Foreign References:
| JP2000131179A | 2000-05-12 | |||
| JP2002228538A | 2002-08-14 | |||
| JP2005114583A | 2005-04-28 | |||
| JPS58120143A | 1983-07-16 | |||
| JP2001311676A | 2001-11-09 |
Other References:
See also references of EP 2060896A4
MR. NOBUYUKI TAMAI: "Doboku Kogaku Kiso Series 5-2 Hydraulics", 10 January 1989, BAIFUKAN, pages: 150 - 152
MR. NOBUYUKI TAMAI: "Doboku Kogaku Kiso Series 5-2 Hydraulics", 10 January 1989, BAIFUKAN, pages: 150 - 152
Attorney, Agent or Firm:
SUZUYE, Takehiko et al. (1-12-9 Toranomon,Minato-ku, Tokyo 01, JP)
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