共查询到19条相似文献,搜索用时 78 毫秒
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本文提出了一种以杠杆触针机构作为微位移传感器,将扫描白光干涉法运用于接触式表面形貌测量的轮廓仪.该仪器的理论分辩力可达纳米级,与垂直扫描测量工作台相结合,测量范围可达5mm.文中重点论述了该轮廓仪测量系统的构成,测量原理,干涉信号数据处理. 相似文献
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WIVS三维表面形貌测量仪 总被引:2,自引:0,他引:2
介绍利用纳米计量垂直扫描工作台实现对6JA干涉显微镜的改造,研制出WIVS三维表面形貌测量仪。该仪器能够精确有效地测量Ra值为0.001~2.0μm的三维表面形貌。通过对改造前后的6JA干涉显微镜进行性能分析,说明了WIVS三维表面形貌测量仪能够满足工程表面测量的发展要求。 相似文献
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S. R. Melikyan 《Measurement Techniques》2015,57(12):1352-1355
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Abstract We present a numerical study of the performance of a one-dimensional Confocal Scanning Optical Microscope (CSOM) when used as a profiler of highly reflecting surfaces. The study is conducted by means of a computer simulation that describes the interaction between the incident beam and the sample in a fairly rigorous manner. The degradation of the depth discrimination as a function of the local surface slope is illustrated with examples, and a criterion for the maximum allowable slope is proposed. We also show that the instrument has difficulties in profiling surfaces that have steps or sharp edges and it is argued that, in general, problems are encountered when the surface profile cannot be considered locally flat in the scale of the Point Spread Function (PSF) of the optical system. This implies that the lateral resolution of the instrument is far worse as a profilometer than when used as an imaging system, and that the unresolved features introduce spurious details on the estimated profile. 相似文献
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基于Bayes决策理论的表面肌电信号模式分类的研究 总被引:1,自引:0,他引:1
通过对采集的四通道表面肌电信号进行分析,对其建立AR(Autoregressive)参数模型,提取AR模型参数构建特征矢量。根据实际表面肌电(SEMG)信号的随机性特征,提出了一种采用Bayes决策理论对肌电信号的AR模型参数特征进行分类的新方法,并运用最小错误率Bayes分类器,很好地实现了对前臂八种动作表面肌电信号的模式分类。平均识别率为99.125%。此外,还提出采用动态聚类中心的方法对其进行了改进,使其平均识别率提高到99.5%。研究表明,采用Bayes分类器对肌电信号的AR模型参数特征进行分类,是一种有效的处理手段,并可直接应用到其它具有随机性特征的生理电信号的模式分类中。 相似文献
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