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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 accuracy of the liquid level measuring device based on the principle of dual-frequency laser interference, the three-dimensional modeling of the upper reference plate and its supporting cylinder of the key components is carried out. When the stress state of the component is fully considered, the three- So that both to meet the accuracy requirements of the analysis can be modestly reduced the amount of computation software. Based on ANSYS Workbench finite element analysis software, the mechanics analysis module is used to simulate the stress state of the upper reference plate during zero point calibration. The results show that in the transient dynamic analysis, the error of the liquid level measuring device is about 0.001 9 mm. Analysis results compared with other level gauge, the error of the liquid level measuring device is small, the measurement accuracy is high.