超声波流量计高分辨率A/D转换电路设计与实现  

Design and Implementation of A/D Conversion Circuit for High-Resolution Ultrasonic Flowmeter

作　　者：张兴红[1] 张慧[1] 王先全[1] 冯济琴[1] 王生宝 

机构地区：[1]重庆理工大学机械检测技术与装备教育部工程研究中心,重庆400054 [2]甘肃省武威市凉州区电力局,甘肃武威733000

出　　处：《仪表技术与传感器》2011年第2期22-25,共4页Instrument Technique and Sensor

摘　　要：针对高精度时差法超声波流量计的时间差信号采集问题,采用一款双通道12位低功耗单片CMOS模拟数字转换器ADC12DL040芯片设计并实现了超声波流量计ns级时间差的高分辨率数据采集,给出了A/D芯片外围引脚电路设计,软件流程图和关键代码,实现了400 kHz输入频率,8 MHz采样频率的超声波时间差高分辨率实时采样。According to the signal acquisition issues of the high-precision ultrasonic flowmeter in time difference method,this paper adopted a two-channel 12-bit low-power monolithic CMOS analog-digital conversion ADC12DL040 chip to design and implemente the nanosecond time difference high-resolution data acquisition in the ultrasonic flowmeter.It presented the A/D chip peripheral pin circuit design,software flowchart and key codes.The high-resolution A/D conversion circuit of the ultrasonic flowmeter realizes the real-time data sampling of 400 kHz input frequency and 8 MHz sampling frequency in the high-resolution ultrasonic flowmeter.

关 键 词：超声波流量计 时差法 A/D转换 数据采集 高分辨率 

分 类 号：TP216[自动化与计算机技术—检测技术与自动化装置]