时域反射器（DR）一个脉冲发射给环路。
Time-domain reflectometry( TDR): An impulse is transmitted into the loop.
系统采用拉曼光时域反射技术，对所测点进行定位。
The position of measurement point was determined by Raman scattering optical time domain reflection (OTDR) technique.
光时域反射计非光纤通信必出无否长的的测量仪器。
Optical Time Domain Reflectometer is a measuring instrument that is essential for optical fiber communication.
同时也使学生了解光时域反射仪的工作原理和基本操作。
Students can understand and master the essential principle and basic …
根据时域反射技术原理，研制了测量土壤含水率的一种新型传感器。
According to the principles of time domain reflectometry, a new kind of sensor of soil water content measurement is explored.
超声时域反射法在实际操作条件下在线监测膜污染显示出独特的作用。
The ultrasonic time-domain reflectometry(UTDR) technique is most useful for the in situ monitoring of fouling under realistic operating conditions.
介绍了采用TDR方式(时域反射法)开发的信号电缆故障点检测仪。
Introduces the signal cable fault locator detector developed on basis of TDR mode.
所述设备包括由光开关和阵列波导光栅组合而成的光时域反射波长选择模块。
The optical time-domain echo wave length selecting module of the equipment comprises the following parts: an optical switch and an array waveguide raster.
探讨了OTDR（光时域反射计）故障定位的原理，说明了OTDR的使用方法。
The principle of OTDR (Optical Time Domain Reflectometry) for faults location and application of OTDR method is discussed.
本文介绍了光纤拉曼散射测温基本原理和基于光时域反射(OTDR)定位原理。
This paper presents the principles of the Raman back-scattering effect based temperature sensing and the OTDR (Optical Time-Domain Reflectometry) based positioning.
基于光时域反射技术，进行了分布式传感光纤检测拱桥钢管混凝土交界面脱空的研究。
Based on optical Time Domain Reflectometry, detecting disengaging at interface of steel tube-confined concrete (STCC) with distributed optical fibers was investigated.
摘要：阐述了基于拉曼背向散射和光时域反射(OTDR)技术的分布式光纤测温系统的原理。
Abstract: The principle of distributed temperature sensor system based on Raman Scattering and optical time domain reflectometer (OTDR) is explained.
同时，还讨论了影响光时域反射仪(OTDR)测试精度的要素和消除测试误差通常采用的对策。
At the same time, it discusses the elements influencing the test accuracy of optical time domain reflectometer (OTDR) and measures for eliminating test error.
研究了一种用于大型工程结构应变、变形状态监测的基于光时域反射技术的分布式光纤应变传感系统。
A distributed optic fiber type strain sensing system based on optical time domain reflectometer and used for monitoring large scale structural strain and deformation state is studied in the paper.
本文介绍一种基于光时域反射技术的PMD测试新方法，可以保证网络运营商最大程度使用现有通信网络。
A new method with Optical Time Domain Reflectometry Technique for detecting PMD allows network operators to maximize the reuse of existing physical plant.
本文在分析研究了现有的光纤应变传感技术的基础上，提出了基于光时域反射技术的缠绕式光纤应变传感系统。
Based on analysis of domestic and foreign study actualities on fiber-optic strain sensor-based system, a new winding fiber-optic strain sensing technique based on OTDR is presented.
阐述了光纤陀螺中光纤环的的作用和绕制技术，介绍了布里渊光时域反射计（BOTDR）的工作原理和性能。
The winding technology of fiber coil used in fiber optic gyroscope was demonstrated. The principle and application of Brillouin Optical Time Domain Reflectometer (BOTDR) were introduced.
从电磁学理论及时域反射测量(tdr)法出发，系统分析tdr传感器类型、材料及尺寸对测试精度的影响。
On the basis of electromagnetic theory and time domain reflectometry (TDR) method, the effects of TDR sensor type, material and size on the accuracy of the measurement are systematically analyzed.
时域反射测量是一种技术先进、应用广泛的测量方法，它能有效的测量出线缆的特征阻抗并且确定出断点的位置。
The time domain reflection measurement is an advanced and universal test method. Through this approach, the characteristic impedance and the breaking point of the wire can be detected.
Robert使得时域反射仪这一课题不再神秘，它能够帮助您检测，测量以及找出任何阻抗不匹配的输电线路。
Detect and measure impedance Mismatches Robert demystifies the topic of time domain reflectometry, which enables you to detect, measure, and locate any impedance mismatch in a transmission line.
应用时域反射仪、中子仪和上钻法测定了农田土壤水分，并对农田土层含水量和主体贮水量的测定结果进行了比较。
The soil moisture is measured in the field by time domain reflectometry , neutron probe and soil sampling, The results showed that the measured values are different.
本发明通过使用具有光时域反射波长选择模块的光纤故障定位设备，具有了降低光纤故障定位系统投入成本的效果。
The device comprises the following parts: a control module, a modulating module, a sending module and a fiber fault position module. The invention reduces the cost of the fiber fault position system.
应用时域反射仪(TDR)土壤水分定位监测方法，研究了南方丘陵区不同坡地利用方式土壤水分动态及其影响因子。
In situ monitoring of soil water content changes in sloping fields under different use types were carried out in a highland region of southern China using time domain reflectometry (TDR).
文章提出了一种用弹膜片和微弯调制机构进行压力传感，用光时域反射探测(OTDR)技术进行测量的分布式光纤压力传感方法。
The paper puts forward a sort of pressure sensor made of stretch film piece and slightly bend concoct construct, which USES OTDR distributing optical fiber pressure sensor.
时域反射仪测定土壤体积含水量的准确度取决于两个关键因素：土壤介电常数的测定准确度以及土壤含水量和介电常数之间的关系模型。
The accuracy of soil water content measured by TDR depends on two key factors: soil dielectric constant and the calibration model of soil volumetric water content vs. dielectric constant.
介绍了布里渊光时域反射计(BOTDR)的分布式光纤应变测量原理，并应用BOTDR技术对钢筋混凝土T型梁加载后的应变分布进行了测量。
The principle of Brillouin optical time domain reflectometer (BOTDR) is introduced and its application to the strain monitoring of the strain distribution of the reinforced concrete beam is studied.
利用数字滤波，建立了时域分离入、反射不规则波的计算方法。
The results of the numerical model test show that the method is very effective for the separation of the incident and reflected irregular wave.
利用FDTD法和PML技术计算分析了平面分界面对脉冲波的反射和折射，充分而形象地描绘平面界面对脉冲波反射的时域过程。
The reflection and the refraction of the pulse electromagnetic waves at a dielectric interface were calculated and analyzed based on the FDTD method and PML technique.
通过大量正演计算，拟合出桩周土为黏土、砂土、粉土条件下缺陷程度与时域速度响应波形中入射波与反射波波幅比之间的关系式。
Using this software, the relationship between degree of defect and ratio of amplitude was studied, in which the influence of the characteristics of the soil around piles is taken into account.
本文应用一致性时域有限差分法（FDTD）和近场远场变换计算散射声目标的反射声压强度，找出反射声压级与目标声中心到换能器间距离的关系。
Using the finite difference time-domain (FDTD) method and near field to far field transformation, pressure of the reflected sound from the scattering target is calculated.
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