科氏质量流量计中全数字驱动技术

doi:10.3969/j.issn.1000-1158.2020.11.10

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摘要针对全数字驱动技术流量管难以启振的问题,综述了模拟转数字启振、随机波启振、正弦波启振、扫频方波启振、正负阶跃交替启振等5种启振方法;针对驱动信号幅值、频率、相位难以调节的问题,提出了解决方法;针对全数字驱动技术的实现平台,综述了2种解决方案:基于DSP的单核全数字驱动和基于DSP+FPGA的双核全数字驱动。其中,基于DSP的单核全数字驱动成本低,易于推广;基于DSP+FPGA的双核全数字驱动精度更高。

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关键词 ：计量学, 科氏质量流量计, 全数字驱动, 启振技术, 驱动参数调节

Abstract：Aiming at the problem that the all-digital driving technology flow tube is difficult to start vibration, five kinds of starting methods such as analog to digital start-up, random wave start-up, sine wave start-up, sweep frequency square wave start-up, and positive-negative step alternate start-up are reviewed. Aiming at the problem that the amplitude, frequency and phase of driving signal are difficult to adjust, the solution is proposed. For the implementation platform of all-digital drive technology, two solutions are summarized: a single-core all-digital drive based on DSP and a dual-core all-digital drive based on DSP+FPGA. Among them, the single-core all-digital driving based on DSP has low cost and is easy to promote, and the dual-core all-digital driving based on DSP+FPGA has higher precision.

Key words： metrology Coriolis mass flowmeter all-digital drive start-up technology drive parameter adjustment

收稿日期: 2019-04-15 发布日期: 2020-11-02

PACS:

TB937

通讯作者: 徐科军(1956-), 男, 江苏无锡人, 合肥工业大学教授、博士生导师,主要从事传感器技术、自动化仪表和数字信号处理方面的研究。Email: dsplab@hfut.edu.cn E-mail: dsplab@hfut.edu.cn

作者简介: 徐浩然(1995-), 男, 安徽六安人, 合肥工业大学在读硕士研究生,研究方向为自动化仪表。Email: 978028253@qq.com

引用本文:

徐浩然,徐科军,刘文,张伦,乐静,黄雅,刘陈慈. 科氏质量流量计中全数字驱动技术[J]. 计量学报, 2020, 41(11): 1370-1379.
XU Hao-ran,XU Ke-jun,LIU Wen,ZHANG Lun,YUE Jing,HUANG Ya,LIU Chen-ciXU Hao-ran¹,XU Ke-jun^1,2,LIU Wen¹,ZHANG Lun¹,YUE Jing¹,HUANG Ya¹,L. All-Digital Drive Technology in Coriolis Mass Flowmeter. Acta Metrologica Sinica, 2020, 41(11): 1370-1379.

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http://jlxb.china-csm.org:81/Jwk_jlxb/CN/10.3969/j.issn.1000-1158.2020.11.10 或 http://jlxb.china-csm.org:81/Jwk_jlxb/CN/Y2020/V41/I11/1370

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