石油测井光纤光栅温度压力传感器

根据石油测井时对温度、压力传感器的要求,设计了一种利用聚合物封装的光纤布喇格光栅(FBG)传感器.封装后的光纤光栅温度和压力灵敏度系数分别为0.02128 nm/℃和0.163 nm/MPa,分别为裸光栅的2.1倍和52.3倍,压力测量范围0～30 MPa,且传感器的温度和压力响应与光栅反射波长呈良好的线性关系.通过现场测井实验,测得光纤光栅温度和压力传感器与电子五参数传感器的测量值符合良好,该传感系统满足了温度和压力测量的要求.     

一种耐高压光纤布拉格光栅压力传感器

提出了一种基于圆柱形应变筒的耐高压光纤布拉格光栅压力传感器，推导了该传感器波长与压力之间的关系，得到了其压力响应灵敏度的解析表达式。从实验上获得了0．0676nm／MPa的压力响应灵敏度，约是裸光纤布拉格光栅压力响应灵敏度的23倍，本传感器的压力响应具有很好的线性，压力测量范围可达30MPa以上。可应用于高压情况下物理量的传感测量。     

光纤光栅传感器在石油测井中的应用

介绍一种新型光纤布拉格(Bragg)光栅油井温度/压力传感器.在详细分析光纤光栅温度、应力传感原理的基础上,设计了适合于井下温度、压力参数测量的传感器.通过温度和压力实验推导了传感器波长与温度、压力之间的关系,得到了压力响应灵敏度的解析表达式.该传感器可实现温度和压力同时测量.现场实验证明:温度测量范围为10～100℃,温度灵敏度为0.0213=nm/℃;在0～20MPa的压力变化范围内,压力灵敏度达0.1631nm/Mpa,能够很好地满足油井井下测量的要求.     

用于石化反应器的光纤F-P温/压复合传感器

为了实时监测石化反应器内部高温、高压环境下压力和温度变化, 严格控制原料的反应过程, 采用法布里-珀罗(F-P)多腔干涉理论, 设计并制备了一种光纤F-P温度、压力复合传感器。该传感器由石英玻璃和蓝宝石玻璃构成, 石英与蓝宝石之间的空气腔为压力腔, 温度腔则为蓝宝石本身。通过理论计算和仿真验证, 分析了压力腔和温度腔不同参数对传感器性能的影响, 从而取得了最佳的传感器结构参数数据。结果表明, 该传感器制作工艺简单且性能可靠, 能够实现0MPa~5MPa和-20℃~300℃范围内压力和温度的同时测量; 该传感器在压力0.1MPa~5MPa和温度20℃~180℃环境下有良好压力温度线性响应关系, 压力灵敏度为796nm/MPa, 温度灵敏度为3.864nm/℃。该传感器适用于石化反应器内部高温高压环境下压力和温度的同时监测。     

一种新颖的高压光纤布拉格光栅传感器

提出了一种新颖耐高压的光纤布拉格光栅(FBG)压强传感器.推导了该压强传感器的FBG中心波长与压强的关系,得到了其压强响应灵敏度的解析表达.从实验获得该压强传感器的压强响应灵敏度为0.0592nm/MPa,是裸FBG压强传感器的19.73倍;在0～45 MPa内,该传感器的压强响应具有很好的线性和重复性,实验值与理论值吻合得很好,且压强响应灵敏度和测量范围是可调的.     

Al2O3薄壁管FBG高温高压传感器性能研究

用有限单元方法建立了Al2O3薄壁管模型,分析了模型在外部受到均匀压力时的应力应变关系.借助ANSYS软件计算出模型的应力和应变.以上述薄壁管为衬底,设计制作了耐压为0～45 MPa、温度为-10～300 ℃、压力灵敏度系数为0.042 6 nm/MPa和温度灵敏度系数为0.011 2 nm/℃的光纤Bragg光栅(FBG)高温、高压传感器,并对其性能进行了测试.结果表明,传感器的压力、应变灵敏度的有限元分析结果与实验测试结果非常吻合.     

应用在油气管线的光纤光栅温度压力传感系统

为了提高光纤光栅的温度和压力灵敏度系数以满足实用化对灵敏度精度的要求,对光纤光栅进行封装设计。得到封装后的光纤光栅温度和压力灵敏度系数分别为0.052nm/℃和0.8208nm/MPa,分别为裸光栅的5倍和273倍,且传感器的温度和压力响应与光栅反射波长成良好的线性关系。通过半个月的油气管线现场实验,测得光纤光栅温度压力传感器与油气管线的电类传感器的测量值符合得特别好,该温度和压力传感系统满足了温度和压力的实时测量。     

传感器及传感器数据融合、变送器

0624050一种耐高压光纤布拉格光栅压力传感器[刊,中]/刘钦朋//激光与红外．—2006,36(6)．—495-497(G)提出了一种基于圆柱形应变筒的耐高压光纤布拉格光栅压力传感器,推导了该传感器波长与压力之间的关系。得到了其压力响应灵敏度的解析表达式。从实验上获得了0．0676nm/MPa的压力响应灵敏度,约是裸光纤布拉格光栅压力响应灵敏度的23倍,本传感器的压力响应具有很好的线性,压力测量范围可达30MPa以上。可应用于高压情况下的物理量的传感测量。参6 0624051基于IEEE802．11b的EPA温度变送器设计[刊,中]/杨云//单片机与嵌入式系统应用．—2006,(6)．—66- 68(C) 0624052采用低分辨率位置传感器的PMSM控制技术[刊,中]/王伊//河南科技大学学报(自然科学版)．—2006,27(3)．—44-47(L)介绍了永磁同步电机(PMSM)控制技术的发展和研究特点,综述了采用低分辨率位置传感器的永磁同     

新颖的光纤光栅温度压力同时区分测量传感器

提出了一种基于圆柱形容器和活塞结合的双光纤Bragg光栅(FBG)温度和压力同时区分测量的传感模型.将FBG 1和FBG 2粘结在基底材料上,基底材料固定在活塞和圆柱形底部间,圆柱形容器内压力和温度的变化将引起FBG 1波长的变化,圆柱形容器内温度的变化引起FBG 2波长的变化,通过2根光栅的波长漂移来进行温度和压力的区分测量.实验测得该传感器的压力响应灵敏度系数为0.822 3 nm/MPa,温度响应灵敏度系数为0.032 2 nm/℃,分别是裸FBG的274倍和3.2倍.该传感器可以实现10 MPa压力以下、-20～100 ℃温度的液体和气体的高精度同时测量;可以改变基底材料的种类或基底材料和活塞的参数,实现不同灵敏度要求的温度、压力同时测量.     

光纤光栅温度压力同时区分测量技术研究

提出一种基于金属合金薄壁弹性圆筒双光纤Bragg光栅(FBG)温度压力同时区分测量的传感模型。将FBG1和FBG2分别沿着圆筒的轴线方向粘贴在空心段外壁上和底座实心的外壁面上。圆筒内压力和温度的变化将引起FBG1波长的变化,温度的变化引起FBG2波长的变化,通过FBG2对FBG1的温度补偿进行温度和压力的同时区分测量。在100℃内2、0 MPa压力下,实验测得传感器的压力响应灵敏度系数约为0.012 nm/MPa,温度响应灵敏度系数约为0.012 nm/℃。     

Technology innovation and process integrations for sub-100nm gate patterning

This paper presents a brief overview of the Applied Centura(R)DPS(R)system,configured with silicon etch DPS Ⅱ chamber, with emphasis on discussing tuning capability for CD uniformity control. It also presents the studies of etch process chemistry and film integration impact for an overall successful gate patterning development. Discussions will focus on resolutions to key issues, such as CD uniformity, line-edge roughness, and multilayer film etching integration.     

White organic light-emitting devices based on fac tris（2- phenylpyridine） iridium sensitized 5,6,11,12-tetraphenylnap -hthacene

We have fabricated the white organic light-emitting devices （WOLEDs） based on 4,4＇ -bis（2,2 -diphenyl vinyl）-1,1＇ - biphenyl （DPVBi） and phosphorescence sensitized 5,6,11,12,-tetraphenylnaphthacene （rubrene）. The device structure is ITO/2T-NATA （20 nm）/NPBX （20 nm）/CBP： x%Ir（ppy）3：0.5% rubrene （8 nm）/NPBX （5 nm）/DPVBi （30 nm）/Alq（30 nm）/LiF（0.5 nm）/A1. In the devices, DPVBi acts as a blue light-emitting layer, the rubrene is sensitized by a phosphorescent material, fac tris （2-phenylpyridine） iridium [Ir（ppy）3], acts as a yellow light-emitting layer, and N,N＇ -bis- （1-naphthyl）- N,N＇ -diphenyl -1, 1＇ -biphenyl-4,4＇ -diamine （NPBX） acts as a hole transporting and exciton blocker layer, respectively. When the concentration of Ir （PPY）3 is 6wt%, the maximum luminance is 24960 cd/m^2 at an applied voltage of 15 V, and the maximum luminous efficiency is 5.17 cd/A at an applied voltage of 8 V.     

Complete approach to automatic identification and subpixel center location for ellipse feature

To meet the need of automatic image features extraction with high precision in visual inspection, a complete approach to automatic identification and sub-pixel center location for similar-ellipse feature is proposed. In the method, the feature area is identified automatically based on the edge attribute, and the sub-pixel center location is accomplished with the leastsquare algorithm. It shows that the method is valid, practical, and has high precision by experiment. Meanwhile this method can meet the need of instrumentation of visual inspection because of easy realization and without man-machine interaction.     

小角度扩展相关性近似算法分析

本论文提出一种在多天线MIMO信道相关性建模中小角度扩展近似理论算法,并应用于分析MIMO系统性能。分析中分别对三种不同角能量分布情况下的空间相关性研发快速近似计算法,并同时提出双模(Bi-Modal)角能量分布情况下的近似运算。通过分析这些新方法的近似效率,可以得到计算简单、复杂度低、而且符合实际的MIMO相关信道矩阵,对系统级的快速高效计算法的研究和系统级的评估以及误差分析具有重要的意义。     

A Versatile Mixed-Signal Pin Approach for Cost-Effective Test of Automotive ICs

Integrated circuits (ICs) intended for increasingly sophisticated automotive applications bring unique test demands. Advanced ICs for applications such as highly integrated automatic braking system (ABS) and airbag controllers combine high voltage digital channels, significant VI demands and precise timing capability. Along with continued missioncritical reliability concerns, the trend toward higher voltage operation and increased device integration requires specialized test capabilities able to extend across the wide operating ranges found in automotive applications. Among these capabilities, automotive test requirements increasingly dictate a need for a cost-effective versatile mixed-signal pin electronics with very high data rates reaching up to 50MHz with a voltage swing of-2 V to +28 V.     

Optical vibration and deviation measurement of rotating machine parts

It is of interest to get appropriate information about the dynamic behaviour of rotating machinery parts in service. This paper presents an approach of optical vibration and deviation measurement of such parts. Essential of this method is an image derotator combined with a high speed camera or a laser doppler vibrometer （LDV）.     

社长序言（英文）

正Happy New Year!As we step into a new year,we take a look back at the key feature topics covered in China Communications over the past 12 months and set out our expecta-     

Call for Papers

正Introduction Jointly sponsored by the China Institute of Communications(CIC)and the IEEE Communications Society(IEEE ComSoc)since the year 2013,China Communications,currently,is aiming to gradually realise the transition from journal to magazine content and style.     

INTEGRATION OF OPTICAL AND WIRELESS NETWORKS

正For a long time,optical and wireless systems/net-works are developed in separate communities witha few attempts for in-depth convergence.In fact,it prom-ises many advantages to combine the optical and wire-less technologies in the levels of systems and networks.Recently,both academia and industry have made manyefforts to enter a new phase of development to take op-tical and wireless systems as fully integrated networks.To provide high bandwidth and reliable service for bothfixed and mobile users,a well-designed network must     

Call for Papers—Feature Topic,Vol.12,No.3,2015

正Smart Grid Communications The electric power industry is undergoing profound changes as the industry aims to capture the promise of a smart grid for a sustainable energy future.Enabled by the advanced sensing devices such as Phasor Measurement Units(PMUs),increasingly powerful