公开(公告)号：US20130170786A1

公开(公告)日：2013-07-04

申请号：US13683314

申请日：2012-11-21

Applicant: Chunghwa Telecom Co., Ltd.

Inventor： Chih-Yih WANG ,  Zi-Wen WANG ,  Chia-Hsien WU ,  Fwu-Yuan TSAI

IPC: G02B6/00

CPC classification number: G02B6/00 ,  G01M3/047 ,  G01N21/552 ,  G01N2021/1793 ,  G01N2201/0886

Abstract: A remote water sensing system and method with optical fiber, comprises a water sensor which is an optical element designed in accordance with the principle of optical path return loss and provided with reusable features to measure the state of having water or not. A monitoring equipment is provided which is an Optical Time Domain Reflectometer (OTDR), an Optical Frequency Modulated Continuous Wave (OFMCW), or a light source power meter, and used to emit monitoring light signals and accept optical signals returned from the water sensor. A signal processing control unit analyzes the optical signal returned from the water sensor to determine whether the monitoring position is touching the water or not. The method can be used in other fields, such as optical closure watering monitoring, telecommunications facilities flooding alarm, and monitoring and alarm for a low-lying area or river water level of a bridge.

Abstract translation: 具有光纤的远程水感测系统和方法包括水传感器，其是根据光路返回损耗原理设计的光学元件，并且具有用于测量具有水的状态的可重复使用特征。 提供了一种监视设备，它是光时域反射计（OTDR），光频调制连续波（OFMCW）或光源功率计，用于发射监测光信号并接收从水传感器返回的光信号。 信号处理控制单元分析从水传感器返回的光信号，以确定监视位置是否接触到水。 该方法可用于其他领域，如光学封闭浇水监测，电信设备洪水报警，以及桥梁低洼地区或河流水位的监测和报警。