基于ANSYS Workbench的液位测量装置精度分析

Analysis on measurement accuracy of level measurement device based on ANSYS Workbench

为了分析基于双频激光干涉原理的液位测量装置的精度,对其关键部件的上基准板及其支架筒体进行三维建模,在充分考虑部件受力状态的情况下,适当简化三维模型,使之既能满足分析的精度要求又能适度缩减软件的计算量。以ANSYS Workbench有限元分析软件为基础,利用其中的力学分析模块,对上基准板在零点校准过程中的受力状态进行仿真分析。研究结果表明,在瞬态动力学分析中,液位测量装置的误差约为0.001 9 mm。分析结果与其他液位计比较,此液位测量装置的误差小、测量精度高。

In order to analyze the level measurement accuracy device based on the double-frequency laser interference principle, the reference plate and the supporting Structure models of the key parts were established, The 3D models were simplified in consideration of the stress state to satisfy the accuracy requirement and reduce calculated quantity. The stress state of the reference plate was analyzed in the process of zero correction based on finite element analysis software ANSYS Workbench. The results showed that in the transient dynamics analysis, the error of the level measurement device was about 0.001 9 mm. The error of this measurement device was smaller and the accuracy was higher than other liquid meters.