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|  | | 为了更好的帮助您理解掌握查询词或其译词在地道英语中的实际用法,我们为您准备了出自英文原文的大量英语例句,供您参考。 | |
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| | Using the frequency measuring instrument. We have done the tests that include the short stability and the repeated rate as well as changing the drying for the Mekometer ME-3000 of No.218031 (the frequency stability of instrument was poorer). The tests indicate that the short stability and the repeated rate is lower than 1.10~(-6). The change of difference between the theoretical frequency and the surveying frequency is 1×10~(-5) after changing the drying. The most of them exist... | | 我们使用测频仪对No.218031号(该仪器频率稳定性较差)ME3000测距仪进行了短期稳定性、重复率、更换干燥剂试验,表明其短期稳定性和重复率低于1×10~(-8),更换干燥剂后应有频率与实测频率之差的变化为1×10~(-5)。比较两台仪器厂家给出的两次波长线非线性改正曲线,比较了六台仪器厂家所给曲线与1985年我们新测曲线的差异,大多存在较大的频率漂移和温度补偿性能的改变。分析1985年全年野外施测资料也证实了上述结论。为此,必须定期测频并测定波长非线性曲线。提高仪器使用精度的根本途径是在测距的同时使用测频仪测定工作频率。 | | 文摘来源 | | Basic approaches to survey frequency by single-chip processor are presented and the reason for error in surveying frequency is analyzed. In addition, two applied examples about surveying frequency by single-chip processor in automatic equipment of power system are introduced. | | 提出用单片机测量频率的基本方法,分析了产生测频误差的原因,介绍了单片机测频在电力系统自动装置中的两个应用实例。 | | 文摘来源 | |   |
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