公开(公告)号：WO2010144100A1

公开(公告)日：2010-12-16

申请号：PCT/US2009/053848

申请日：2009-08-14

Applicant: UNIVERSITY OF WASHINGTON ,  PATEL, Shwetak, N. ,  FOGARTY, James, A. ,  FROEHLICH, Jon, E. ,  LARSON, Eric, C.

Inventor： PATEL, Shwetak, N. ,  FOGARTY, James, A. ,  FROEHLICH, Jon, E. ,  LARSON, Eric, C.

IPC: G01M3/26 ,  G01M3/00

CPC classification number: G01F1/34 ,  E03B7/071 ,  F17D1/08 ,  F17D5/02 ,  G01M3/26 ,  G01M3/2807 ,  G01M3/2815 ,  Y02A20/15 ,  Y10T137/0318 ,  Y10T137/8175

Abstract: By monitoring pressure transients in a liquid within a liquid distribution system using only a single sensor, events such as the opening and closing of valves at specific fixtures are readily detected. The sensor, which can readily be coupled to a faucet bib, transmits an output signal to a computing device. Each such event can be identified by the device based by comparing characteristic features of the pressure transient waveform with previously observed characteristic features for events in the system. These characteristic features, which can include the varying pressure, derivative, and real Cepstrum of the pressure transient waveform, can be used to select a specific fixture where a valve open or close event has occurred. Flow to each fixture and leaks in the system can also be determined from the pressure transient signal. A second sensor disposed at a point disparate from the first sensor provides further event information.

Abstract translation: 通过仅使用单个传感器监测液体分配系统内的液体中的压力瞬变，容易检测诸如特定固定装置上的阀的打开和关闭等事件。 可以容易地耦合到水龙头围嘴的传感器将输出信号传输到计算设备。 每个这样的事件可以通过将压力瞬变波形的特征特征与先前观察到的系统中事件的特征相比较来识别。 这些特征可以包括压力瞬变波形的变化压力，导数和实际倒谱，可用于选择发生阀门打开或关闭事件的特定夹具。 每个夹具的流量和系统中的泄漏也可以从压力瞬变信号确定。 设置在与第一传感器不同的点处的第二传感器提供另外的事件信息。