基于DSP处理的科里奥利力质量流量计设计

Design of DSP based Coliolis force mass flow meter.

利用科里奥利力原理, 研制的基于数字信号处理器 (DSP) 的科里奥利力质量流量计,可测量流体的密度、温度、瞬时质量流量和瞬时体积流量。该质量流量计主要针对信号处理中存在的问题, 采用数字滤波处理信号, 利用自相关和互相关的计算方法, 计算出信号的周期和相位差,抗干扰能力强, 测量精度高。由于采用数字信号处理器, 保证了信号处理的实时性。实际测试和标定的结果证明, 以TMS320C6211数字处理器为核心设计的科里奥利力质量流量计是一种准确、快速、可靠、高效、稳定、灵活的流量测量仪表, 可望在石油加工、化工领域得到广泛应用。

Digital signal processor (DSP) based Coliolis force mass flow meter is developed according to the Coliolis force theory, which can be used to measure the density, temperature, instantaneous mass flow and instantaneous volume flow rate of the fluid. The meter adopts autocorrelationand cross correlation calculation method to work out the period and phase difference of the signals processed by the digital filter. It has good antijamming capabilityand high accuracy of measurement. Real time signal process is ensured since the digital signal processor is used. This mass meter is proved reliable and stable and efficient.