500kg机械台秤示值误差测量结果的不确定度评定

Evaluation of Uncertainty of Indication Error of 500kg Mechanical Scales

机械台秤是利用不等臂杠杆原理工作。由承重装置、读数装置、基层杠杆和秤体等部分组成。读数装置包括增砣、砣挂、计量杠杆等。基层杠杆由长杠杆和短杠杆并列连接。称量时力的传递系统是:在承重板上放置被称物时的4个分力作用在长、短杠杆的重点刀上,由长杠杆的力点刀和连接钩将力传到计量杠杆重点刀上。通过手动加、减增砣和移动游砣,使计量杠杆达到平衡,即可得出被称物质量示值。机械台秤结构简单,计量较准确,只要有一个平整坚实的秤架或地面就能放置使用。对物品的承重计量使用方法简单,被广泛应用于农贸集市、商场、物资仓库和工厂企业等场所。本文针对500kg机械台秤示值误差测量结果进行不确定度评定。

Mechanical scale is the use of unequal arm lever principle work. By the load-bearing device, reading device, the primary lever and scale body and other components. The reading device comprises a mound, a mound hanging, a measuring lever and the like. The primary lever is connected in parallel by a long lever and a short lever. Weighing force transmission system is： placed in the bearing plate is called when the four components of the role of the long and short lever on the key knife, by the long lever of the force point of the knife and connect the hook to force the measurement of leverage Knife on. By manually adding and subtracting the mound and moving the mound, so that the balance of the measuring lever, you can get the indication of the quality of that thing. Mechanical scale simple structure, measurement is more accurate, as long as there is a flat solid frame or the ground can be placed on the use of scales. The load-bearing measurement of the use of simple items, are widely used in agricultural markets, shopping malls, warehouses and factories and enterprises, and other places. In this paper, the uncertainty of the measurement results of the indication error of 500 kg mechanical platform scale is evaluated.