Natural gas is a kind of important chemical raw material and clean energy sources . the volume measurement of standard orifice is a major way in trade . instead of the mechanical measurement , the ddz instrument method is being widely used <中文摘要> =作为重要的化工原料和清洁能源天然气,在贸易交接过程中的计量目前以孔板差压式流量计测量体积流量为主,测量方式正大规模地由机械式向电动单元组合式发展。
The technology of micro - electronics and calculation method was fully made in the system . how to improve the accuracy of standard orifice measurement is also discussed from the following aspects : the means of measurement and transmitter , online correction of measurement parameter and abnormal condition . all those means are used to overcome its shortcomings of less scale of measurement range , short period of checkout , more tache of maintenance and low accuracy of measure 该系统充分利用微电子技术和计算技术以及通过实际现场总结的经验,主要从测量与变送环节采取的措施、相关参数的在线实时补偿算法、非正常情况的在线补偿三个方面对如何提高量精度加以论述,尽可能地弥补孔板差压式流量计量程比较小、检定周期短、维护环节多、准确度低的不足。