量块双频激光干涉坐标测量系统的设计

目前,对于尺寸小于300 mm的四等及以下的非标称尺寸量块可以采用高精度万能测长仪测量,而对于尺寸大于300 mm的三等及以下非标称尺寸量块,则没有很好的测量方法。为此,提出了基于坐标测量机的双频激光干涉量块检定系统,对700 mm三等量块进行测量并对校准系统进行不确定度分析。通过与量块附带检定证书和JJG 146-2003量块检定规程的比对,验证了量块检定系统的准确性与可靠性。

Design of the Gauge Block Measuring System Based on Double-frequency Laser Interference Coordinate Measurement

With the help of universal high precision length measuring instrument,the non-nominal gauge blocks less than 300mm of class four or below can be measured,but there is no good method to measure the gauge blocks larger than 300mm of class three or below.Therefore,the calibration system of gauge block based on double-frequency laser interference for coordinate measuring machine is proposed to measure the gauge blocks of 700mm of class three and to analyze the uncertainty of calibration system.Through comparing with verification certificate of the gauge block and JJG 146-2003 Verification Regulation of Gauge Block,the precision and reliability of the gauge block calibration system are verified.