LEAKED WATER DETECTOR - Toshiba Corporation

Title:

LEAKED WATER DETECTOR

Document Type and Number:

Japanese Patent JP3144971

Kind Code:

B2

Abstract:

PURPOSE: To specify a duct network including points where water leaks by providing a flowmeter for measuring the amount of daily minimum flow corresponding to a plurality of duct network and then judging water leakage based on the amount of measured daily minimum flow.
CONSTITUTION: A flowmeter 2 corresponding to each of a plurality of duct network measures the amount of daily minimum flow and a measurement signal S1 is input to a data processor 3. The processor 3 stores the flow rate data in a storage circuit. The daily minimum flow rate graph of a set period is created based on a period setting for detecting leaked water from the flow rate data. A first-order function graph can be created using the least square method by an approximation graph creation circuit based on the graph. In a first-order expression y=ax+b appearing in the graph, it is judged whether the value of the difference of the flow rate exceeds a reference value according to the value of an inclination (a) to judge the presence or absence of water leakage. Therefore, a duct network where water leaks can be specified, thus reducing the time and expense required for water leakage investigation.

Inventors:

Yoshihiro Honkura

Application Number:

JP31623393A

Publication Date:

March 12, 2001

Filing Date:

December 16, 1993

Export Citation:

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