Method of estimating location of abnormality in fluid feed pipeline network
First Claim
1. A method of estimating the location of a sudden leak in either a trunk line or locating the junction of a branch line containing a sudden leak in a water feed pipe line network, comprising the steps of:
- (a) detecting a leak by comparing a measured pressure and previous measured pressure at each sensor location to determine if the amount of pressure difference at any arbitrary sensor exceeds a predetermined value;
(b) calculating an upstream fitting curve based on the pressure differences measured by a plurality of sensors, where the amount of pressure difference between the source and the leak gradually increases when measured from a water supply source;
(c) calculating a downstream fitting curve based on the pressure differences measured by a plurality of sensors, where the amount of pressure difference between the leak and the end of the trunk line gradually decreases when measured from a water supply source; and
(d) estimating the location of the sudden leak in the trunk line or the branch line by calculating a point of intersection of the two fitting curves.
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Accused Products
Abstract
A method of detecting the location of a failure (e.g., a sudden leak) in a fluid pipeline network, which can be suitably used for estimation of the location of a failure in a water pipeline network, includes the steps of periodically measuring a flow rate or fluid pressure with sensors arranged at a plurality of measuring points along a pipeline in a water pipeline network; comparing a latest measured amount and a previous measured amount at each measuring point to determine if an amount of change at an arbitrary point has exceeded a predetermined value; and calculating a position at which an amount of change becomes maximum, the position being calculated from the magnitudes of the amounts of changes in respective measured values at the time of the detection. The pipeline network may be a water supply and distribution pipeline network which includes a trunk pipeline and branch pipelines.
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Citations
7 Claims
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1. A method of estimating the location of a sudden leak in either a trunk line or locating the junction of a branch line containing a sudden leak in a water feed pipe line network, comprising the steps of:
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(a) detecting a leak by comparing a measured pressure and previous measured pressure at each sensor location to determine if the amount of pressure difference at any arbitrary sensor exceeds a predetermined value;
(b) calculating an upstream fitting curve based on the pressure differences measured by a plurality of sensors, where the amount of pressure difference between the source and the leak gradually increases when measured from a water supply source;
(c) calculating a downstream fitting curve based on the pressure differences measured by a plurality of sensors, where the amount of pressure difference between the leak and the end of the trunk line gradually decreases when measured from a water supply source; and
(d) estimating the location of the sudden leak in the trunk line or the branch line by calculating a point of intersection of the two fitting curves. - View Dependent Claims (2, 3, 4, 5, 6, 7)
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Specification