摘要
针对叠加式力标准机的准确度评价,重点研究了参考标准长期稳定性与力标准机准确度的关系,强调了对长期稳定性的考核必须在力值数据未经修正的前提下进行。分别采用直接法与间接法对3MN叠加机进行了考核,结果表明其长期稳定性优于±0.02%,力值扩展不确定度优于0.03%(k=2)。讨论了准确度优于0.03级的叠加机的量值溯源问题,指出了用直接法溯源到1MN静重式力基准机的可行性和优点,对于我国大力值计量体系的发展具有重要意义。
In order to evaluate the accuracy of build-up force standard machines,the relationship between the long-term stability of the reference standards and the accuracy of the machine is studied.It is necessary to keep the force values of the standard machine unchanged for the verification of the long-term stability.The 3 MN buildup force standard machine is verified using both direct method and indirect method.The test results show that the long-term stability of the machine is better than ±0.02% and the expande...
出处
《中国测试》
CAS
2010年第4期28-30,共3页
China Measurement & Test
关键词
力值计量
叠加式力标准机
长期稳定性
准确度
量值溯源
force metrology
build-up force standard machine
long-term stability
accuracy
traceability
