宽量程的气体超声测量  

High-Rangeability Ultrasonic Measurement of Gas Flow

作　　者：顾宇[1] 周康源[1] 宁晨[1] 陈昕[1] 

机构地区：[1]中国科学技术大学电子工程与信息科学系,合肥230027

出　　处：《数据采集与处理》2004年第3期356-360,共5页Journal of Data Acquisition and Processing

摘　　要：研究了一种针对管径和流量变化范围大的气体的超声流量测量系统的设计。利用传统流量计的原理 ,结合微弱信号处理技术和目前先进的 CPLD高频电路设计技术 ,针对高精度、宽量程的要求 ,设计出具有数字 AGC自动增益控制和纠错系统、高频计数系统在内的新型气体超声波流量计 ,它还具有主从处理器并行工作结构和多种输出方式。A system design for ultrasonic measurement of high-rangeability tube caliber and gas flow is introduced. According to the traditional theory for ultrasonic flowmeter, using an advanced CPLD high frequency circuit design technology and faint signal processing technology, a new type of ultrasonic flowmeter is designed with digital AGC(automatic gain control) system, automatic error detection and correction system, and high frequency counting system. It also has master and slave MCU framework working in parallel mode and manifold output modes which can provide interfaces for many industry standards. Experimental results are given in laboratory environment.

关 键 词：流量计 气体超声测量 微弱信号处理 CPLD 电路设计 

分 类 号：TB551[理学—物理] TB9[理学—声学]