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现在对数字通信测试仪器校准时,采用的校准方法只是进行零点校准。目前测试方法缺乏全面性,还应该对较大误差进行校准。本文针对较大误差进行测试研究。 相似文献
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介绍了垂直冲击机的结构、组成及工作原理;根据垂直冲击试验的各项技术要求建立校准系统,确立校准方法;采用计算机对整个校准过程的校准结果进行数据采集和波形分析,并针对不同试件调整其校准方法. 相似文献
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该校准装置是针对本所研制的μg/L级溶解氧分析仪的工作特点而研制的一套计量校准装置。该装置有机地把电化学分析理论与现代仪表检测技术结合起来,通过在系统中控制加入氧量值,用高精度的进口溶解氧分析仪同725所研制的溶解氧分析仪进行测量比较,来达到校准溶解氧分析仪的目的。该装置采用计算机进行数据采集与处理,显示和打印输出。 相似文献
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论述了1553B总线分析仪校准方法和内容,包括电气校准、规纺校准和噪声控制校准,并对实施过程中的关键技术作了分析。 相似文献
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介绍了导弹舵机测试系统上力矩测量时所用的扭矩传感器的结构及工作原理,结合导弹舵机测试系统中加载台上扭矩传感器的实际安装结构,设计力矩校准装置,根据扭矩测量的测试原理及溯源要求确立校准方法,采用计算机进行数据采集,将采集到的数据进行运算分析形成校准曲线和拟合直线,最终得出校准结论. 相似文献
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A new calibration method for a photoelastic modulator is proposed. The calibration includes a coarse calibration and a fine calibration. In the coarse calibration, the peak retardation of the photoelastic modulator is set near 1.841 rad. In the fine calibration, the value of the zeroth Bessel function is obtained. The zeroth Bessel function is approximated as a linear equation to directly calculate the peak retardation. In experiments, the usefulness of the calibration method is verified and the calibration error is less than 0.014 rad. The calibration is immune to the intensity fluctuation of the light source and independent of the circuit parameters. The method specially suits the calibration of a photoelastic modulator with a peak retardation of less than a half-wavelength. 相似文献
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One-point (linear through zero) calibration is often used as a compromise between necessary calibration, workload, and time. The aim of the present study was to systematically check the applicability of one-point calibration by comparing bias and precision data obtained with full and one-point calibration. Data from validation studies of six mass spectrometry-based multianalyte bioanalytical assays were used for this purpose. Bias and intermediate precision datasets of full multiple-point calibration were compared to six one-point calibration datasets (A-F in rising calibrator concentration order) calculated from the same raw data. The datasets were statistically compared using the Friedman test followed by Dunn's multiple comparison test. The results obtained with full calibration and the different one-point calibrations were found to differ significantly (P < 0.05) in all of the six studied methods. The best one-point calibration results were obtained with calibrator D, with which acceptance criteria for bias and precision were fulfilled for the majority of analytes. However, some extremely high bias and precision data were obtained for some analytes in the low-concentration range. In conclusion, one-point calibration with a calibrator close to the center of the full calibration range can be a feasible alternative to full calibration. 相似文献
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动态校准技术的难点在于非电量传感器的动态校准,“静标动用”的方法在一定条件下是合理的;温度传感器的动态校准面临着比压力传感器更多有待研究的问题。对动态校准技术的研究,扩展和提升了对计量概念的理解和认知。对于被校系统的特性分析已超越基于溯源的测量,将成为计量学首要的研究内容。动态校准技术的研究与发展应当给予更加充分的关注和投入。 相似文献
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该文着重介绍烘干法水分测定仪的检定方法。温度和质量是这类水分测定仪的两大关键计量指标,因此,将水分测定仪的检定分为衡量装置和烘干装置两大部分,其中衡量装置依据OIMLR76直接检定,而烘干装置则采用间接测量的方法。根据上述两部分的性能指标,参照OIMLR59综合评定水分测定仪的计量性能。 相似文献
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为建立高注量率同步辐射X射线计量领域相关的国家标准,对同步辐射X射线能量标定方法进行研究。在北京同步辐射装置上选择6、10和20keV三个能量点进行实验,得到的传递探测器校准因子与辐射能量的关系曲线近似直线,变化趋势呈线性递减;在20keV能量点,不同直径光阑条件下进行的标定实验验证了传递探测器的校准因子与光源照射到基准电离室与传递探测器的光子通量有关。在上海光源上进行10~70keV能量标定实验,得到传递探测器的校准因子拟合曲线;10~20keV能量段的变化趋势与在北京同步辐射装置得到的校准因子变化趋势一致,30~70keV能量段的校准因子随着能量的增加而平稳缓慢增大。对各个能量点标定产生的A类不确定度进行评定,为后续建立国家计量标准同步辐射X射线空气比释动能量值传递体系提供了技术数据。 相似文献
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