光纤F-P干涉传感器进行精密表面粗糙度测量原理探讨

本文在双F-P腔光纤干涉仪测距原理和光纤探针粗糙度测量方法的基础上,提出了光纤F-P干涉传感器的高精度表面粗糙度测量原理.着重探讨了其测试方法.     

激光—光纤表面粗糙度传感器设计原理分析

本文简要分析了现有两种常规表面粗糙度检查仪的缺点。在此基础上提出了新型激光—光纤表面粗糙度传感器的设计原理,为新型非接触表面粗糙度检查仪商业性产品提供了设计原理。     

对表面粗糙度的非接触测量

应用光纤技术设计了一种新型光纤传感器。该传感器可用于表面粗糙度和微位移测量,本篇论述其在测量表面粗糙度方面的应用。基于光在粗糙表面的散射原理,采用散射光比法,能对Ra≤0.8μm 的粗糙表面实现快速、简便的非接触测量.     

光纤型表面粗糙度比较测量仪的研制

本文简单论述根据光散射理论研制的表面粗糙度测量光纤传感器的结构特点,介绍了利用这种新型传感器构成的表面粗糙度比较测量仪的结构原理和性能分析。仪器实际测量精度为±20%,重复精度为±5%。     

光导纤维测表面粗糙度的应用研究

文章详细介绍了光纤测表面粗糙度的原理、实验装置、实验结论。分析得出:(1)光纤传感器的电量输出与测试距离d的关系;(2)传感器电量输出与测试距离及表面粗糙度Ra的关系;(3)传感器的电量输出与粗糙度参数Ra值的关系,4)传感器电量输出与Ra值的拟合曲线方程。此外,文章还介绍了目前国外采用的双测头光纤传感器的测量原理。     

一种新型的光纤传感器的研究—对微位移的非接触测量

应用光纤传感技术设计一种新型光纤传感器。该传感器可用于表面粗糙度和微小位移的非接触测量。本文论述了其对微位移的测量。在该传感器特有的“零”工作点对信号采用差分放大处理,能实现对微位移的非接触测量,并具有纳米(10~(-?)m)级的分辨率。     

科技新成果信息

多通道光纤位移传感器一种新型的多通道高精度位移检测传感器——多路光纤位移传感器于1993年5月24日通过了由国家自然科学基金委员会组织的专家鉴定。该传感器的主要技术指标为:测量范围±1mm;分辨率为0.02μm;测量精度优于±0.15μm;零点漂移小于0.1μm/小时;工作距离为11mm 或33mm;测量头直径φ3mm。该传感器采用光纤耦合及分光结构,使从被测物体表面反射回光纤的测量光与直接在探头表面反射回的参考光形成共光路干涉结构。用锯齿波驱动电流使     

一种新型的表面粗糙度测量仪

】介绍了一种利用单片机为核心、以光纤为传感器的新型便携式表面粗糙度测量仪的测量原理,硬件电路及软件设计。该仪器具有工作效率高、体积小、测量可靠、操作方便、成本低等特点,特别适用于生产现场的成批零件检验或抽检。     

用于光纤传感的非对称法布里-珀罗腔

设计了一种用于光纤传感的新型非对称法布里—珀罗(F-P)干涉腔。干涉腔由固定在石英毛细管的两根镀膜光纤构成,该干涉腔改善了普通F-P腔的反射响应特性,有助于提高传感器的灵敏度和测量范围。基于薄膜干涉理论对该干涉腔的反射率响应关系的计算与分析,得出该非对称F-P腔的结构参数。设计结果表明,这种新型干涉腔具有线性度好、灵敏度高和线性范围宽的优点。     

一种新型自混合激光干涉光纤应变传感器

提出了一种新型的光纤应变传感器.它是基于LD自混合干涉原理,作为探头的Fabry-Perot(F-P)腔的两个光纤端面都镀上反射膜.这两个端面的反射光返回到LD后,将在LD谐振腔中产生自混合干涉,干涉条纹数反映了应变的大小.该传感器结构灵巧、灵敏度高,其测量结果与采用反射镜时所得结果完全一致.     

Surface profile texture characterization of trimmed laminated composite in the stacking sequence direction

The surface texture characterization of laminate composites is complex due to its heterogeneous structure and to the different stratified surface properties. Profile roughness parameters are highly impacted by those different layer properties, and their distributions are relatively spread out. A new filtering technique is proposed to improve the surface roughness parameter efficiency. To present issues from current filtering methods and to highlight this new approach, profile surface roughness taken from trimmed carbon fibre reinforced plastics samples are inspected in the composite stacking sequence using a contact profilometer. For each measurement, several roughness parameters are calculated. The efficiency of different filtering techniques is investigated through the roughness parameters distribution, calculated for up- and down-milling and for different tool wear. The new proposed technique, based on the separate characterization of plateaus and large deep valleys of the composite surface profiles, is found to be particularly efficient on the down-milling face.     

In-process measurement of surface roughness during cylindrical grinding process

An in-process surface roughness sensor developed by the author has been applied to cylindrical grinding operations. The sensor utilizes fibre optics to illuminate a workpiece surfacec and to detect the intensity of the reflected light. A change of surface roughness during one plunge grinding cycle is measured for various grinding conditions. It is confirmed by the measurements that the surface roughness is closely related to changes of the workpiece radius during a grinding cycle. The result is quite simple and it is useful in determining the cycle time of a grinding operation.     

Automated Surface Roughness Measurement

A non-contact roughness sensor is described that is suited for integration with a computer-controlled coordinate measuring machine (CMM). The sensor employs a fibre optic interferometer, electronic control system and data-processing software. The combination of the sensor and computer controlled CMM allows surface texture assessment to be made during scheduled dimensional inspections of complex curved surface components, such as turbine blades. The sensor system will measure surface roughness parameters, for example Ra, using a method that reflects standard procedures. The lightweight sensor head can be mounted on a touch probe arm and the associated articulated mounting head; this combination gives quasi 5-axis positioning ability to the overall sensor. This is suitable for automated surface finish inspection of compound curved surface blades. The sensor and its control unit are integrated with the CMM controller and its operation can be controlled through standard part-program commands used by the CMM.     

The fibre optic sensor in the in-process measurement of surface roughness

In the paper, a NFF type fibre optic displacement sensor is proposed, which now has been adopted to measure surface roughness. The system with this sensor is designed to be suitable for in-process measurement, in which a Z8 single-chip microcomputer is matched. The whole system is supported by assembly programs and is automatic, intelligent and flexible. The output changes of the sensor are discussed respectively for several special cases, and some necessary measures are described for the real operational environments.     

用于测量表面粗糙度的漫射反射比光纤传感器

本文介绍了一种用于测量表面粗糙度的漫射反射比光纤传感器，阐述了它的结构、工作原理、实验结果和特点。它能成功地消除待测表面反射率的变化和光源功率不稳定对测量结果的影响。除用于测量表面粗糙度外，还可用来测量微小位移     

基于Matlab图像处理的磨削表面粗糙度的检验

针对磨削表面粗糙度难于测量的特点,利用Matlab图像处理和图像捕获工具箱,提出用图像处理来检验磨削表面粗糙度的新方法,并将计算结果与针测式检验结果进行比对,证明计算方法的可行性.     

一种光纤式机器人触觉传感器的设计研究

本文介绍了一种机器人触觉传感器的结构原理及设计方法。利用光纤传感器的强度调节原理，可以产生压觉和滑觉信号。文中给出一些设定的参数。     

单模光纤耦合传感器的设计

以单模光纤耦合器的熔融区为传感元件的传感器是一种特殊和广泛应用前景的光学检测技术。本文分析了该传感器的敏感机理,依据单模光纤耦合传感器耦合输出是传感器耦合区长度和振动频率的函数关系,提出该种传感器可实现应变和振动检测。搭建了以微应变仪和等强度悬臂梁的应变和振动检测系统,设计了实验系统的每个单元,详细分析了耦合型光纤传感器的静态响应特性和温度、横向压力干扰影响,结果表明该类型传感器对应变的响应非常灵敏。通过与压电振动传感器的测试对比,得出该传感器可更好地实现低频和高频振动检测,并分析了其低频和高频的响应特性。耦合型光纤传感器耦合区材料、结构本身、制作工艺等因素将影响传感器的静、动态性能,面向实用化,需解决传感器存在的一些问题。     

基于光学色差传感器的表面粗糙度测量

随着机械加工自动化程度的提高，对表面粗糙度的测量提出了越来越高的要求。表面粗糙度的测量一直面临着提高测量精度和抗干扰能力的挑战，提出了一种新的利用光学色差来测量表面粗糙度的非接触测量方法，这一方法不但具有一般非接触测量所具有的快速、对工件表面无损伤等特点，而且在提高精度和抗干扰能力两方面都有很强的优势。重点介绍了利用光学色差法测量表面粗糙度的理论依据以及基于光学色差原理的光学色差传感器，分析了应用光学色差传感器测量表面粗糙度的工作原理。通过实验证明了理论分析与实验结果相符。