微机精化补偿技术在大齿轮齿形精度就地测量系统中的应用

本方法可使线、圆感应同步器装置的测量误差分别由±７．５μｍ和±１．８″减小到±１μｍ和±０．４８″，显著地提高了测量系统的测量精度及可靠性，使该系统可以满足在普通齿轮加工机床上对５～６级大型齿轮齿形精度的测量要求。     

基于虚拟仪器技术的气针式传感器研制

根据测量任务的特点和要求,利用虚拟仪器技术,研制了非接触式高精度气针式传感器.该传感器将传统的气动测量原理与虚拟仪器技术强大的数据采集和处理功能结合起来,实现了球径的高精度测量,并可广泛应用于各种精密尺寸测量.     

LSI薄膜台阶测量仪的研制

本文介绍了一台实用化的用于ＬＳＩ薄膜台阶在线检测的台阶测量仪,它采用精密机械——ＬＶＤＴ——信号处理——计算机控制的方案。使用方便,实现了台阶的自动测量。实验表明：仪器重复测量精度可达±０．０１４７μｍ,很好地满足了ＬＳＩ生产线上的要求。     

高精度气动传感器的研究

介绍了气动测量中常用反射式和背压式气动传感器的设计与工作原理。理论分析出提高气动传感器灵敏度和测量范围的方法;通过对影响测量精度主要误差因素的分析,给出相应误差补偿的方法。所研制气动传感器的测量范围为55μm,分辨力为O．02μm,静态误差小于0．25μm,可适用于高精度高分辨力的非接触尺寸测量。     

干涉仪光程差的遥测及其应用研究

用由光纤串接的双白光迈克尔逊干涉仪所组成的干涉系统可以实现位移量的遥测。论述了该干涉系统的工作原理、实用设计和实验结果。在２０００μｍ的测量范围内遥测精度达到±０．５μｍ,并且传输精度既与光纤本身的损耗无关,也与接头或联接器的损耗无关,具有较强的实用性。将此系统应用于甲烷气体浓度的遥测,其精度达到±０．１１％,它相当于±０．０４μｍ的位移遥测精度。     

双频激光三尺组合法直接度测量系统

本文提出一种双频激光三尺组合法直线度测量系统，理论分析及实验结果都说明本系统可望获得优于０．１μｍ／ｍ的精度，是提高现有直线度测量精度的一个较实用的方法。     

一种新型非接触式光纤振动传感器的研究

利用非本征的Ｆａｂｒｙ－Ｐｅｒｏｔ（Ｆ－Ｐ）光纤干涉仪以及双光源,通过位移与距离的同时检测,实现了振动过程的非接触测量。本方案结构简单,信号处理方便。实验结果表明,在１ｍ ｍ 的范围内可达到分辨率０．０１μｍ,精度０．１μｍ 。     

大面积液晶面板光刻机新型工作台设计

论述曝光面积可达３３５．６ｍｍ×３５５．６ｍｍ（４″×１４″），套刻精度为±２μｍ，接近式（０～２５μｍ）液晶面版光刻机的新型工作台设计。     

胶条材料的在线厚度测量

德国机器供应商LAP已改进其Calix传感器,从而达到或超过辐射测量系统的精度,而后者通常用于测量薄胶条材料,经检测说明,这种激光厚度测量仪在0．02～30mm的测量范围内能达到±4μm的测量精度或±0．4μm的重复精度。     

光针式三维表面形貌测量仪的研制

研制了一种基于动态聚焦探测法的新型光针式三维表面形貌测量仪,该仪器可实现表面三维形貌的快速、无损、非接触测量。介绍了该仪器的测量原理、仪器结构、伺服机构的设计并给出了实测结果。仪器垂直测量范围为500μm;垂直方向测量精度可达0·5μm,分辨率为0·01μm。     

A quest for the definition of measurement

Since in the scientific and technical literature multiple, sometimes incompatible, definitions of ‘measurement’ can be found, identifying a single conceptual framework is a significant target for measurement science, towards a generalized concept of measurement, in compliance with the notion of widely-defined measurement proposed by Ludwik Finkelstein. This paper introduces the subject with a structured review of some paradigmatic positions and then proposes to characterize measurement as an evaluation process able to produce objective and inter-subjective information on the measurand. A justification is given that this standpoint encompasses the evaluation of both physical and non-physical properties.     

汽车变速箱齿轮轴校直策略

分析传统的在线测量与校直工艺存在的问题,提出使用两套测量定位装置实现测量环节与校直环节分步进行的齿轮轴校直策略。     

齿轮径向跳动测量的误差分析及补偿

针对齿轮径向跳动误差的传统测量方法进行了分析,指出了传统方法存在的缺点;通过分析,提出了一种新的误差分析及补偿的方法,该方法可以用计算机进行辅助误差测量及数据处理,并证明了这种方法的正确性和可行性。     

湿式气柜内压测量方法合理性探讨

本文分析了气柜压力的３种测量方法的特点和存在的问题。推荐采用直接取压法,提高气柜压力测量的精度。     

浅谈气缸套同轴度在三坐标上的正确测量

本文介绍了气缸套同轴度在三坐标上的正确测量方法,利用三坐标测量机进行检测,三坐标测量既直观又方便,且测量精度高,可以大幅度的降低生产成本,缩短生产周期,但由于不正确的评价方式,可能会出现测量结果误差很大,从而误导生产过程的控制.     

Analysis of quantities influencing the performance of time synchronization based on linear regression in low cost WSNs

Time synchronization is a key feature of Wireless Sensor Networks (WSNs). In low cost WSNs this is a very challenging issue since the general employment of a large number of nodes, characterized by low power and limited energy resources. Therefore, in such contexts, the adoption of synchronization algorithms is preferable to the adoption of GPS-based solution because of its high energy consumption, high cost and poor performance in indoor environment. An even increasing number of papers dealing with the design and the implementation of protocol-based techniques for synchronization can be found in literature.These synchronization algorithms can be divided into three main categories: one way messaging, two ways messaging and consensus based synchronization. Among the others, those based on the one way messaging and, in particular, on the adoption of regressive algorithms are widely used in many application contexts. Focusing the attention on this class of synchronization algorithms, this paper proposes a deep performance analysis aimed at highlighting the sensitivity of the regression-based algorithms to some factors that influence the accuracy in typical low cost applications, such as the finite resolution of the local timing clock, the presence of clock drift, clock high frequency noise and low frequency noise, the presence of latencies due to the radio devices, the presence of latencies due to the microcontroller device. The main goal is to evaluate the effect of each one of these factors of influence on the overall synchronization performance. To these aims, suitable analyses both in simulation environment and on real nodes have been carried out.     

动态线材直径测量新方法

提出一种新的非接触式动态测量金属线材直径方法。理论分析表明,当采用后向测量时,利用金属表面对光的反射定律以及傅立叶变换原理,可以得到正比于被测线材支径的光强,避免了前向测量时边缘检测的烦琐处理,并且可以消除线材振动的影响。本方法还可以摆脱前向测量法必须把被测物体放在测量装置之间的限制。初步的实验表明,该方法有可能为金属线材的在线动态测量提供一种迅速、简单的途径。     

The GUM, Bayesian inference and the observation and measurement equations

In this paper, we compare uncertainty evaluation procedures based on the measurement and observation equation approaches applied to a class of models covering many practical measuring systems. We derive general conditions for when the two approaches give the same distributions associated with the measurand and give examples of how and where they differ. We argue that while it is possible to interpret the measurement equation approach as determining a state of knowledge distribution for the measurand, for some problems there are conceptual, and for highly nonlinear models, practical difficulties with this interpretation. These conceptual difficulties do not arise if the measurement equation approach is interpreted as characterising the behaviour of a measuring system. The discussion presented here is relevant to the revision of the GUM, currently being undertaken by the Joint Committee for Guides in Metrology.     

视觉测量技术及其在现代制造业中的应用

视觉测量技术 (或称数字近场摄影测量技术 )是一种立体视觉测量技术。讨论视觉测量系统的组成、关键技术、视觉测量技术在工业领域实时应用中亟待解决的问题 ,并给出组建视觉测量系统的具体策略。     

高速回转件润滑状态测量方法的研究

本文提出一种测量高速回转件润滑状态的新方法，通地在摩擦副间施加一个大小可变的直流电压，利用润滑油（脂）膜瞬间被电压击穿的原理，进而对记录的信号波形进行分析，可分别获得摩擦副间的润滑膜厚度以及微观表面粗糙度等信息，用该方法对纺织机械中的高速回转件，诸如气流纺杯轴承和化纤锭子的润滑状态进行了测量，取得了较好的效果，从而为纺机高速回转零件在运转过程中润滑状态的测量提供了有效的测试手段。