The new type precise instrument for measuring angle with tri-needle method introduced here adopts comparative measurement principle and the concept of transfer coefficient is introduced.It introduces the principle of new type instrument with tri-needle method in detail.Then the feasibility to calibrate the instrument is discussed and the working structure for the instrument is built.Afterwards the working principle of the instrument is verified with measuring examples,and the measuring process is illustrated as well as the technological features are analyzed.Finally the influencing factors of measuring precision are summarized and the matters to be paid attention ware proposed.%介绍的三针法角度法角度精密测量采用比较测量原理,引入了传递系数的概念,对新型三针法角度精密测量仪的工作原理做了比较详细的介绍,讨论了三针法测量角度精密测量仪标定的可行性,建立了新型三针法角度精密测量仪的工作结构,用测量算例验证了三针法测量角度精密测量仪的工作原理,说明了该角度精密测量仪测量过程,分析了新型三针法角度精密测量仪的工艺特点,总结了测量精度的影响因素并提出了设计注意事项.
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