Affiliations: [a] School of Aircraft Engineering, Beijing Polytechnic, Beijing, China | [b] School of Instrumentation and Optoelectronics Engineering, Beihang University, Beijing, China
Correspondence:
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Corresponding author: Nan Chen, School of Aircraft Engineering, Beijing Polytechnic, Beijing 100176, China. E-mail: chennan_bdk@163.com.
Abstract: In order to improve the signal processing effect and efficiency of Coriolis mass flowmeter, a signal processing system of Coriolis mass flowmeter based on time-varying signal model is designed. Based on the analysis of the structure and working principle of Coriolis mass flowmeter, the environmental factors affecting the performance of Coriolis mass flowmeter are discussed. Based on the above analysis, the signal processing environment is designed, including serial signal processing environment and dual core parallel signal processing environment. Then the effective signal processing of Coriolis mass flowmeter is completed from three aspects: initial processing, phase calculation and frequency tracking. The experimental results show that after the time-varying signal model is applied, a complete signal frame can be collected in less than 50 ms in the pre-processing process, and the signal processing frame can be completed in less than 80 ms in the post-processing process. This shows that the signal processing time of the system is short, and the phase difference detection accuracy of the signal processing system based on the time-varying signal model is high, which is of great value to further improve the application effect of Coriolis mass flowmeter.
Keywords: Time-varying signal, signal analysis, Coriolis mass flowmeter, signal processing, phase difference
