Traceability enhancement in angle measurements

详细信息    查看全文

• 作者：Vytautas Giniotis ; Mindaugas Rybokas
• 关键词：Angle standard ; Measurement ; Traceability ; Etalon ; Uncertainty
• 刊名：Measurement
• 出版年：2009
• 出版时间：December 2009
• 年：2009
• 卷：42
• 期：10
• 页码：1516-1521
• 全文大小：702 K

文摘

Traceability of angle measurements is based mainly on the standard of the plane angle – prism (polygon) calibrated at appropriate accuracy. Nevertheless, the standard (etalon) of flat angle – polygon has many restrictions for the transfer of angle unit – radian (rad) and other units of angle. It depends on number of angles formed by the flat sides of the polygon. Here is proposed a possibility to create the standard of the plane angle equal to π rad using the circular scale with the rotation axis of very high accuracy and two opposite placed precision reading instruments with appropriate alignment. Proposed method permits an implementation of π rad as primary standard angle and enables to assure a traceability of flat angle measurements at laboratory environment. Short information about the multipurpose angle measurement test bench developed is presented.