基于激光干涉法的自由落体原理,中国计量科学研究院研制了最新的NIM-3A型绝对重力仪。该仪器参加了第9届全球绝对重力仪国际比对CCM.G-K2,根据公布的国际比对结果,NIM-3A型绝对重力仪的测量结果与参比各仪器的测量结果达到了等效一致,测量结果的合成标准不确定度为5.3 μGal。
Abstract
Based on laser interference technology and free-fall theory, the National Institute of Metrology (China) has developed the latest NIM-3A type absolute gravimeter.This instrument has participated in the 9th international comparison of absolute gravimetries CCM.G-K2,according to the published result of CCM.G-K2,the NIM-3A type absolute gravimeter with the combined standard uncertainty of 5.3 μGal is agreed with the key comparison reference value and the degree of equivalence is gained.
关键词
计量学 /
绝对重力仪 /
国际比对 /
不确定度
Key words
metrology /
absolute gravimeter /
international comparison /
uncertainty
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参考文献
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[2]吴书清,葛春雨,刘达伦,等.基于FPGA的重力仪干涉条纹和时间间隔计数[J].计量学报,2010,31(6):530-532.
[3]吴书清,李春剑,粟多武,等.绝对重力仪国际比对新动态[J].计量学报,2013,34(6):545-547.
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基金
国家质检总局量传项目(22-AJG1403)