英语翻译INTRODUCTIONSensors based on fiber optics technologies h

英语翻译
INTRODUCTION
Sensors based on fiber optics technologies have been successfully employed in fields,such as telecommunication,electrical devices,aerospace structures,and medical fields.This is because optical fibers have several positive attributes,including (a) small diameter,therefore none or least intrusive to host structures,(b) immunity to electromagnetic interference (EMI),(c) high sensitivity,and (d) ability to transmit data as well as being used as a sensor.
Owing to these advantages,efforts have been also directed to develop fiber-optic based sensors for applications in civil engineering,especially in monitoring the conditions of infrastructures.It has been demonstrated that fiber-optic sensors can be used to measure strain and pressure in the structures.Another emerging application of fiber optics sensors in civil engineering is in vehicle wheel load sensors (weigh-in-motion (WIM) technology).WIM system is a system to determine weight of vehicles moving on highway with normal speed.Recently,attempt has been made to use optical fiber in WIM
There have been developments of a few new optical fiber technologies,which show special promise for force,displacement,stress and strain sensing applications.Some of these include the specialized forward time division multiplexing (FTDM) fiber,fiber Bragg grating,and holey fiber.The FTDM dual-core fiber that has two concentric light-guiding regions has shown its potential ability to directly sense and measure magnitudes as well as locations of loads applied at multiple points.
The paper presents the multiple bending analysis of the FTDM dual-core fiber to determine the light loss of its inner light guiding region under mechanical bends.Analytical investigation has been done to study effects of several relevant parameters (such as V numbers,bend length,number of bends,spacing of bends,deflection,and bending radius of the fiber) in order to create proper amount of light leakage from inner core.Details of the FTDM dual-core fiber is briefly explained in the next section.
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介绍
基于光纤传感器技术已成功地用于领域,如电信、电力设备、航空结构、医学等领域.这是因为光纤有几个正面的属性,包括(1),因此没有小直径或至少侵入举办结构(b)免疫电磁干扰,(c),且灵敏度高,(d)的能力来传输数据以及被用来作为传感器.
由于这些优势,努力发展为基础,也是指导光纤传感器应用于土木工程,特别是在基础设施的情况.已经证明,光纤传感器可以用来量测及压力的结构.另一项应用光纤传感器在土木工程在车辆行驶称重传感器(轮)技术(WIM).WIM系统是一个系统,确定车辆在高速公路上的重量与正常的速度移动.最近,尽力利用光纤在WIM
已经有发展的一些新的光纤技术,显示特殊的力量、位移、应力、应变传感应用.这些包括专业的分析的基础上,提出了FTDM复用(时间)纤维、光纤光栅,holey纤维.这个FTDM双核纤维,有两个同心light-guiding地区的潜在能力已经显示出它直接意义和测量的位置大小以及应用在荷载作用下的.
介绍了多个弯曲的分析来确定FTDM双核光纤光丧失其内在的光指导区域机械折.通过分析研究的相关参数(如V编号,弯曲的长度,数量的弯曲变形、间距的弯曲,、弯曲半径的纤维)为了创建适当数量的光渗漏的内核.详细的FTDM双核纤维简要阐述在接下来的章节.