一、引言迄今为止,在国家计量部门,只有带刀口支承的杠杆天平一直用于最准确的质量比较。这些所谓的1kg 原器天平都备有装卸砝码的遥控装置,使用两次称重法或替代法进行比较。除了其它原因外,测量精度的极限主要是由于刀口支承和摩擦,腐蚀及灵敏度对外部机械影响的综合问题造成的。为此,最近进行了研究,其目的是想用 I. INTRODUCTION So far, in the national metrology department, only the leveraged balance with knife-edge support has been used for the most accurate quality comparisons. These so-called 1kg prototype balances are equipped with a remote control for loading and unloading weights and are compared using two weighings or substitutions. Among other reasons, the limits of measurement accuracy are mainly due to the combination of knife edge support and friction, corrosion and sensitivity to external mechanical influences. To this end, a recent study was conducted, the purpose of which is to use