Journal Article

Research on error correction algorithms for Coriolis flowmeters

Zeng, Junfeng, Liu, Yajun, Liu, Qinglin

2025

Overview

The Coriolis mass flowmeter is a high-precision flowmeter that can directly measure the mass flow value. Its working principle ensures that the measurement results of the Coriolis mass flowmeter have good reproducibility and high measurement accuracy. However, when dealing with a flow medium composed of gas and liquid in two phases, the Coriolis flowmeter will no longer possess stability and high precision under single-phase flow measurement. The research collected the vibration signal data of the Coriolis flowmeter under gas-liquid two-phase working conditions, used the power spectrum algorithm to extract its internal frequency domain features such as phase values and frequency values, and then combined the pressure data in the flow pipeline to conduct data modeling on the Coriolis flowmeter. Experiments have demonstrated that the GRU (Gated Recurrent Unit) model has the best training effect on the aforementioned feature vector data. In the dynamic tracking research of the flowmeter, the instantaneous measurement accuracy has reached 94.41%, and the cumulative mass flow measurement error within 60 seconds is only 2.63%.

• Publisher: IOP Publishing
• Subject: Accuracy / Algorithms / Error analysis / Error correction / Flow measurement / Mass flowmeters / Single-phase flow / Vibration measurement