基于正交双光栅的容积测量方法及误差分析

针对药室容积的高精度测量问题,提出了一种基于正交双光栅的容积间接测量方法。分析了药室的结构特点,合理地分配各个测量要素的极限误差,设计了相应的药室容积测量装置,并对其测量误差进行分析。实验结果表明:该方法具有较强的稳定性,测量精度高且实效性好,与传统的测量方法相比,直径测量精度由±0.028 mm提高到±0.012 mm,长度测量精度由±0.050 mm提高到±0.013 mm,容积测量的相对误差由0.80‰提高到0.11‰,测量时间小于24.8 min/m,有效地提高了药室容积测量的精度和效率。

Volume Measurement Error Analysis and Method Based on Crossing Dual Gratings

An indirect measurement method based on crossing dual gratings was proposed for the accurate measurement of powder chamber volume. The characteristics of powder chamber structure were analyzed, the limit errors of measuring key points were distributed reasonably, and a measurement equipment of powder chamber volume was designed, and its measurement error was analyzed. The experimental results show that the method proposed is quite stable, accurate and efficient. Compared with the traditional methods, the diameter measurement errors are improved from ±0.028 mm to ±0.012 mm, the length measurement errors are improved from ±0.05 mm to ±0.013 mm, the relative errors of volume measurement are improved from 0.8‰ to 0.11‰. And the measuring time was less than 24.8 min/m. The method can be used to improve the precision and speed of powder chamber volume measurement effectively.