An Open-Loop Characteristic Testing System of Coriolis Mass Flowmeter Based on Virtual Instrument Technology

Coriolis mass flowmeter (CMF) is becoming a research hotspot in flow measurement for its high accuracy and multi-parameter measurement. Through the dynamic study on CMF's vibrating model, get the conclusion that the key factors of close-loop system design is the open-loop characteristic parameters such as natural frequency and mechanical quality factor (Q value) et al. An open-loop testing system specialized for CMF is designed based on virtual instrument technology using Graphical Programming Language (LabVIEW). The algorithm adopts the rescanning sweep-frequency activating method. Experiment results show that the system has high frequency resolution, can analyze the open-loop characteristic of CMF rapidly and accurately, and also reduces the hardware cost to the full extent.