应用FPGA的LNG质量流量计数字部分的设计与实现  

Application of FPGA in LNG Mass Flowmeter Digital System Design

作　　者：孙茂一[1] 赵普俊[1] 唐琳[1] 

机构地区：[1]中国测试技术研究院流量所,四川成都610021

出　　处：《仪表技术与传感器》2014年第7期46-47,51,共3页Instrument Technique and Sensor

摘　　要：针对现有的LNG质量流量计硬件结构较为复杂、测量精度也比较低的现状,采用FPGA器件去控制AD采样,改进了传统的LNG质量流量计的数字系统部分的设计。实验结果表明,文中所设计的应用FPGA的LNG质量流量计较以往类似的质量流量计测量精度有很大提高,测量单元与数据采集、数据处理单元相分离的设计方式使得硬件结构也得到了简化。In view of the existing current situation that LNG mass flow meter hardware structure is relatively complex and the measurement accuracy is relatively low,this paper used FPGA device to control the AD sampling,improve the quality of the digital system design of traditional LNG flow meter. Experimental results show that the LNG mass flow meter application has higher accuracy than previous similar mass flowmeter,the design that measurement unit and data acquisition,data processing unit is separated makes hardware structure simplified.

关 键 词：质量流量计 液化天然气 现场可编程逻辑门阵列 双缓冲 

分 类 号：TP29[自动化与计算机技术—检测技术与自动化装置]