光纤电压传感器的研究现状及应用

光纤电压传感器作为近年来兴起的光纤传感器的一个分支，在许多方面特别是电力工业有重要应用。本文系统地评述了光纤电压传感器研究的现状及进展，分析比较各种光纤电压传感器的优缺点，总结分析了目前光纤电压传感器研究所存在的主要问题及今后的发展方稀?     

光纤传感器及其在流量测控中的应用

主要说明了光纤传感技术及在流体测量领域的应用及发展情况。概要地介绍了光纤传感器的原理和特点，当前光纤传感器在流量测控领域的应用，详细阐述了光纤涡轮流量计、光纤涡街流量计、光纤多普勒流速计、干涉型光纤流量计、光栅式光纤流量计和多相流量计的组成、原理和使用特点等。     

工程化光纤光栅应变传感器的制作及其应用

分析了适用于动态应变测量的光纤光栅传感器所应满足的条件，并进行了相关实验。在实验的基础上，设计并制作了一种适用于工程化的光纤光栅动态应变传感器。对等强度水泥梁以及实际工程中的卢浦大桥等场合，用该光纤光栅应变传感器与传统的电阻应变片传感器进行了对比验证。实验结果表明，光纤光栅应变传感器具有很高的精度。     

测量纵向位移的光纤位移传感器

提出了一种测量纵向位移的光纤位移传感器的方法。列出了3种可行性结构方案：双棱镜单光纤位移传感器、单棱镜单光纤位移传感器、双棱镜双光纤位移传感器，并对各自进行了理论推导以及系统仿真，得到了比较满意的结果。其中双棱镜双光纤位移传感器的性能最佳，在自聚焦透镜的半径为1mm的前提下，检测纵向位移的范围可以达到4mm，这为将来的实际应用提供了有效的参考。     

二维光纤位移传感器

本文介绍了一种新型强度补偿型二维光纤位移传感器。这种传感器的测量探头由３根呈正三角形分布、型号相同的光纤组成，其中两根光纤用于测量探头位置，另外一根光纤提供功率补偿。利用这种传感器，不仅可以测得探头正三角形中心相对于照明光纤中心的位移，还可以进一步给出二维坐标（ｘ，ｙ）。除此而外，这种传感器还可以消除光源功率波动对测量的影响，提高测量精度。     

光纤传感技术的现状与展望

一、光纤传感技术的现状及目前水平光纤传感器按照光纤的应用方式,可以分成两大类型:第一类如图1所示,称为传感型光纤传感器。第二类如图2所示,称为传光型光纤传感器。传感型光纤传感器主要采用单模光纤,特别是偏振保持光纤。它具有传、感合一,     

工程结构光纤应变传感器

研究了一种用于土木工程结构监测的本征型强度调制光纤传感器。其敏感部分是利用光刻技术在多模光纤上形成的齿槽周期结构。文中对该传感器原理作了详细的分析，首次得到这种传感器既能测量拉应变，也能测量压应变的结论。传感器对应变的响应具有良好的线性和重复性，其应变灵敏度完全由敏感元件结构参数决定。文中给出了钢筋拉应变、混凝土压应变的试验，结果与理论一致，表明这种传感器是土木工程结构力学测量、结构监测等方面应用的新一代较为理想的光纤传感器     

光纤化学传感器及其发展现状

综述了光纤化学（生化）传感器的独特优点、工作原理、仪器结构及各类光纤化学传感器（ｐＨ、ＮＨ３、ＳＯ２、ＣＯ２、Ｏ２、各种阳离子、阴离子等）的现状和发展趋势。对光纤化学传感器的有关技术问题作了详细评述。     

光纤油轮液位测试仪

光纤油轮液位测试仪由光纤液位传感器、光纤温度传感器及二次仪表组成，本文简要地叙述了光纤液位传感器、光纤温度传感器的工作原理。     

强度型光纤位移传感器的稳定性研究

强度型光纤位移传感器的稳定性研究徐育，金泰义，李胜利，王正安（中国科学技术大学精密机械与精密仪器系）０引言随着光纤技术的不断发展，越来越多的光纤传感器被用在制造技术的各个方面进行动态检测和静态检测，这其中有大量采用的是强度型光纤传感器［’］［‘］，而...     

A multi-point optical fibre sensor for condition monitoring in process water systems based on pattern recognition

Preliminary results are presented for a multi-point optical fibre sensor designed to detect the presence of chemical species in water at spatial intervals of greater than 20 m. The sensor is addressed using optical time domain reflectometry (OTDR) with a spatial resolution of 10 m. The optical signals arising from the OTDR are highly complex due to interfering effects from external parameters such as localised fibre straining and temperature changes. Because of this level of complexity it has been found advantageous to use artificial neural networks (ANNs) as classifiers on the OTDR signals. The preliminary system has been trained initially to recognise only the presence of water, although it is planned to extend this capability to recognise the presence of contaminants in the water such as bacteria and chemical pollutants. Initial investigations show that different contaminants and interfering parameters (cross-sensitivities) may give rise to characteristic signatures on the OTDR signal which may be identified by the pattern recognition software.     

光纤式机器人触觉传感器横向串扰信号的分析

本文对所研究的光纤式机器人触觉传感器的横向串扰信号进行理论分析和实验研究,提出消除这一串扰信号的方法,并给出实验结果。     

In-process monitoring of the cutting front of CO2 laser cutting with off-axis optical fibre

A new method is presented in this study to test a way that can effectively provide detailed information on the surface morphology during CO₂ laser cutting by directly measuring the emitted light from the cutting front. The system consists of a copper tube, glass fibre, polymer fibre and photodiode sensor. In this study, the laser power was modulated from 50 Hz to 300 Hz to disturb the natural burning cycle during gas assisted CO₂ laser cutting. The optical fibre was set at 75° to the cutting direction. The wave frequency of the detected signal was very close to the striation frequency of the cut surface, which shows that the sensing system designed and developed in this research can effectively in-process monitor the CO₂ laser cutting process.     

光纤光缆技术发展概述

综述了光纤光缆在制造、施工、维护技术中的发展特点,分析了其发展趋势,并就我国光纤光缆技术发展提出了一些值得思考的问题.     

光纤声发射传感器

一种用于状态监测和故障诊断的新型声发射传感器已经研制成功。它基于全光纤法布里—珀罗干涉仪原理。其分辨率高达埃级,频率范围为100kHz～1.4MHz。由于信号光束和参考光束在同一根光纤中通过,所以消除了温度变化、微弯效应以及电磁干扰等环境影响,并具有很高的测量稳定性。     

干涉法激光-光纤表面粗糙度传感器设计

根据光波的干涉原理,在分析了现有光纤表面粗糙度传感器某些缺陷的基础上,设计了新型干涉型激光－光纤表面粗糙度传感器,为新型非接触式表面粗糙度测量提供了新方法。     

Optical fibre-based sensor technology for humidity and moisture measurement: Review of recent progress

Humidity and moisture sensing is becoming increasingly important in industry and through a wide spectrum of applications and a review of research activity in the field across a range of technologies was presented previously by some of the authors. Recognizing the major developments in the last few years, especially in the field of fibre optic humidity and moisture sensing, this paper aims to extend that approach to review and categorize recent progress in the optical fibre field for the measurement of humidity and moisture and examine, as a result, the breadth of applications that now are being discussed.     

Non-optical tip–sample distance control method for scanning near-field optical microscopy using a piezoresistive micro cantilever

A piezoresistive micro cantilever is applied to monitor the displacement of an optical fibre probe and to control tip–sample distance. The piezoresistive cantilever was originally made for a self-sensitive atomic force microscopy (AFM) probe and has dimensions of 400 µm length, 50 µm width and 5 µm thickness with a resistive strain sensor at the bottom of the cantilever. We attach the piezoresistive cantilever tip to the upper side of a vibrating bent optical fibre probe and monitor the resistance change amplitude of the strain sensor caused by the optical fibre displacement. By using this resistance change to control the tip–sample distance, the two-cantilever system successfully provides topographic and near-field optical images of standard samples in a scanning near-field optical microscopy (SNOM)/AFM system. A resonant characteristic of the two-cantilever system is also simulated using a mechanical model, and the results of simulation correspond to the experimental results of resonance characteristics.     

A 10 mm measuring machine based on a compensated laser interferometer

A single-axis measuring microscope has been constructed for the calibration of stage micrometers, micrometer microscopes and similar devices which require uncertainties down to 0.1 μm. The instrument is built from modules so that the interferometer measuring unit can be used in a variety of calibration tasks. A single mode optical fibre can be used to couple the laser source to the interferometer     

Statistical analysis of a method for monitoring fibre outside diameter using dual beam of edge diode light

Results of studies of the metrological feasibilities of an optical method of filament diameter measuring are presented. The analysis is based on statistical approximation of the experimental results. Systematic and random contributions to the total measurement error are estimated, and are equal to −0.15 μm and +0.15 μm, respectively, in the acceptable range of fibre lateral displacement equal to about 1 mm. Resolution of the method is about 0.05 μm.