共查询到19条相似文献,搜索用时 625 毫秒
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针对超精密机床主轴回转误差分析仪校准难的问题,分析了主轴回转误差分析仪的系统组成及测量原理,提出了一种基于示值误差、线性度、重复性等主要计量特性的校准方法;搭建了一种专用的校准装置,该装置采用纳米微动台进行位移驱动,采用高精度激光干涉仪作为计量标准,测量线符合阿贝原则,能够在普通实验环境条件下实现:位移范围±1mm内最佳测量能力优于10 nm,10 min内示值稳定性优于2 nm;进行了主轴回转误差分析仪校准试验,给出了不确定度评定方法。该校准方法及装置能够满足主轴回转误差分析仪以及各种纳米级位移传感器及仪器的溯源需要。 相似文献
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基于微波功率测试方法研究,建立了一种基于GPIB接口电脑全自动控制测量的功率敏感器自动校准系统,阐述了系统的组成、工作原理及相对于传统校准方法的优点,分析了该系统测量不确定度的数学计算模型和主要不确定度分量的来源,并结合实际给出了测量不确定度的评定过程. 相似文献
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搭建了基于激光干涉仪测量原理的三轴微位移测量系统,对大范围二维纳米位移台的控制及非线性校准进行实验研究。介绍了双频激光干涉仪测量系统的构成;编写了纳米位移台的控制程序和激光干涉仪数据采集程序;阐述了位移台的非线性校准方法,并通过实验对比了多项式三阶拟合和三阶分段拟合的差别,验证了校准方法的准确性。实验表明:使用三阶分段拟合的校准方法效果更好,校准前,x轴的最大非线性误差为4.052μm,y轴的最大非线性误差为2.927μm;校准后,x轴的最大非线性误差为15nm,y轴的最大非线性误差为17nm,仅为原始非线性误差的1%。 相似文献
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激光干涉仪具有测量分辨力高、测量结果可溯源等优点,在纳米测量中的应用日益广泛。介绍纳米测量机和低膨胀材料线膨胀系数测量装置中应用的迈克尔逊型激光干涉仪以及在高准确度位移测量装置中应用的法布里-珀罗型激光干涉仪,并结合这些实例对激光干涉仪光学系统设计、测量环境控制、迈克尔逊干涉仪非线性误差补偿以及法布里-珀罗干涉仪量程扩展等方面的关键问题进行分析和总结。所述原则和方法对实现纳米级测量准确度具有重要意义,可为高准确度激光干涉仪的研制及其在纳米测量中的更广泛应用提供技术参考。 相似文献
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Nanometer measurement with a dual fabry-perot interferometer 总被引:1,自引:0,他引:1
On the basis of analyzing sinusoidal phase-modulating Fabry-Perot interferometry, a method, believed to be novel, is proposed for achieving nanometer measurement accuracy by measuring the time interval between equal amplitudes of the two elementary frequency signals of the transmitted intensities of a dual Fabry-Perot interferometer. A nanometer measurement system based on the method was designed and tested. The experimental results show that the displacement resolution of the system is 0.32 nm at a 1-kHz modulating signal. 相似文献
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阐述了2 m激光干涉测长基准装置工作原理及系统组成,以线间距测量功能为基础,研究了接触式和非接触式的几何测长对准方法,实现了其测长功能拓展应用。介绍了实现纳米精度测长的技术措施。对称布局的双光电显微镜同步扫描测量接长的方式实现2 m刻线间距测量,信号处理系统具有标准间距位置脉冲发生功能,可以实现位移传感器动态触发校准和其它应用。对于高质量的线纹尺,2 m激光干涉测长基准装置单次测量刻线间距的最佳瞄准精度优于10 nm(1σ),1 m测量范围内的线纹测量不确定度U=(20+40 L) nm (k=2)。 相似文献
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Traditional high-precision optical techniques, such as interferometry, are in ever-greater demand for noncontrolled environments. This is the case for the UPC-ZEBRA, a large-aperture interferometer that was built to measure vertical discontinuities (i.e., piston errors) in segmented mirrors. The large mechanical systems used to drive the interferometer to the different measurement positions generate perturbations that are highly incompatible with the expected piston measurements on the nanometer scale. We introduce a new system based on a line-scan CCD to track interference fringes. The error signal obtained from this fringe tracker has been used in a closed-loop control system to actively stabilize the interferometer. The perturbation has been attenuated by a factor of 1/200. 相似文献
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Bacon DR 《IEEE transactions on ultrasonics, ferroelectrics, and frequency control》1988,35(2):152-161
A primary calibration method for ultrasonic hydrophones which uses a Michelson interferometer to determine the particle displacement in an ultrasonic field is discussed. The acoustic pressure is derived from this measurement and used to determine the free-field sensitivity of a hydrophone in the frequency range 0.5-15 MHz. The random uncertainty of the method is typically 1%, whereas the systematic uncertainty varies from 2.3 to 6.6% over the frequency range. To obtain this accuracy, the performance of the system has been carefully examined and appropriate correction factors derived. The greatest difficulty in the method lies in determining the frequency response of the optical detection system, and two different approaches have been used to measure this response. Several acoustical effects have also been studied and the calibration procedure modified to take account of them. The calibration results are in agreement with those of other methods and with the theoretically predicted frequency response of a hydrophone. The method has been used to determine the temporal stability of a hydrophone over a period of two years. 相似文献