\r孙立军^{1, 2}，张 扬^{1, 2}，王 涛³，连锦鹏^{1, 2}，李春辉\r^{1, 2}\r
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AuthorsHTML:\r孙立军^{1, 2}，张 扬^{1, 2}，王 涛³，连锦鹏^{1, 2}，李春辉\r^{1, 2}\r
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AuthorsListE:\rSun Lijun^{1, 2}，Zhang Yang ^{1, 2}，Wang Tao ³，Lian Jinpeng ^{1, 2}，Li Chunhui \r^{1, 2}\r
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AuthorsHTMLE:\rSun Lijun^{1, 2}，Zhang Yang ^{1, 2}，Wang Tao ³，Lian Jinpeng ^{1, 2}，Li Chunhui \r^{1, 2}\r
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Unit:\r\r1. 天津大学电气自动化与信息工程学院，天津 300072；\r
\r\r2. 天津市过程检测与控制重点实验室，天津 300072；
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\r3. 肯特大学工程与数字艺术学院，肯特郡坎特伯雷CT2 7NT，英国\r
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Unit_EngLish:\r1. School of Electrical and Information Engineering，Tianjin University，Tianjin 300072，China；
2. Tianjin Key Laboratory of Process Measurement and Control，Tianjin 300072，China；
3. School of Engineering and Digital Art，University of Kent，Canterbury，Kent CT2 7NT，UK\r
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Abstract_Chinese:\r 科里奥利流量计依靠振动管检测流体流动. 潜在的侵蚀或腐蚀会降低管壁厚度并影响其测量性能，严重情况下甚至可能导致结构完整性问题. 由于管壁厚度直接影响其刚度，因此与刚度相关的诊断参数有助于识别潜在的测量和完整性问题. 在假设的单自由度(SDOF)系统基础上，使用Matlab Simulink构建仿真模型，并使用双频驱动的方法计算刚度诊断参数；基于仿真结果，在数字信号处理(DSP)开发板中实现了控制回路及相关信号处理算法；使用正交解调算法并结合特殊设计的滤波器分离共振和非共振的响应信号，并实时计算振动管的刚度参数；为了设计实验，建立了振动管的有限元仿真模型，得到了刚度与力之间的关系；利用试验机对振动管施加轴向拉力和压力验证算法. 实验结果表明：双频驱动的方法可以计算出振动管的刚度诊断参数，该方法可以为实际应用提供有用的诊断信息.
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Abstract_English:\r\rCoriolis flowmeters rely on oscillating tubes to sense fluid flows\r．\rHowever\r，\rpotential erosion or corrosion can reduce the tube wall thickness and affect their measurement performance\r，\rand severe thickness reduction may even result in structural integrity issues\r．\rAs the tube thickness directly affects their stiffness\r，\ra diagnostic parameter related to stiffness will aid in identifying potential measurement and integrity issues\r．\rUnder the assumption of a single-degree-of-freedom\r \rsystem\r，\ra simulation model was constructed in Matlab Simulink\r，\rand the calculation of a stiffness diagnostic parameter using the dual-frequency excitation method was simulated\r．\rOn the basis of the simulation results\r，\ra control loop\r，\ralong with relevant signal processing algorithms\r，\rwas then implemented in a digital signal processing development board\r．\rA quadrature demodulation algorithm combined with specially designed filters was employed to separate resonant from non-resonant response signals\r，\rand the stiffness parameter of the oscillating tube was calculated in real time\r．\rTo design the experiments\r，\ra finite element simulation model of the oscillating tube was established\r，\rand the relationship between stiffness and force was obtained\r．\rBy employing a test machine\r，\raxial tension and compression forces were applied to the oscillating tube to verify the algorithms\r．\rThe experimental results show that the dual-frequency excitation method can calculate the stiffness diagnostic parameter of the oscillating tube and can be used in real applications to provide useful diagnostic information\r．\r\r
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Keyword_Chinese:科里奥利流量计；双频驱动；流量校准系数；刚度；检定和诊断\r

Keywords_English:Coriolis flowmeter；dual-frequency excitation；flow calibration factor；stiffness；verification and diagnostics\r


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