基于Cortx-M3的低功耗多声道超声液体流量计设计  

Design of Multi-channel Ultrasound Wave Fluid Flow Meter Based on Ultra-low Power Cortx-M3

作　　者：王莉[1] 曹译恒 任胜杰[1] 牛群峰[1] 

机构地区：[1]河南工业大学电气工程学院,郑州450001

出　　处：《自动化与仪表》2014年第12期13-17,共5页Automation & Instrumentation

基　　金：国家"十二五"科技支撑计划项目(2012BAF12B13);河南省教育厅自然科学项目(13A535181);河南工业大学研究生教育创新计划项目(2012YJCX60)

摘　　要：设计了一种基于ARM Cortx-M3核的STM32L超低功耗多通道液体流量智能计量仪表。详细介绍了流量计的硬件电路设计和软件控制流程。系统以ARM内核的STM32L微控制器为计算控制核心,采用高精度超低功耗时间数字转换器TDC-GP22进行超声传播时间的测量,通过多通道的回波信号自动增益调节和误差修正算法来提高计量精度,实现了液体流量的高精度计量、存储、数据在线监控等功能。具有计量精度高、功能可扩展性强、使用介质可选、声道数可选、低功耗等优点。A multi-channel ultrasound wave fluid flow meter was designed based on ultra-low power MCU STM32 L with Cortx-M3 core. This paper introduced hardware circuit design and software control flow in detail. It adopted the ARM kernel STM32 L microcontroller as the calculating control core in this system,the time measurement was realized by high precision time digital converter TDC-GP22 with ultra low power. To improve the measure precision,this system had multi-channel echo signal automatic gain adjustment and error correction algorithm. It realized the measurement of liquid flow,storage and on-line monitoring and other functions. This intelligent meter has such advantages as high measuring accuracy,strong extensible,optional medium,optional channels and low power consumption.

关 键 词：嵌入式控制器 Cortx-M3 时间数字转换器 误差修正算法 

分 类 号：TH7[机械工程—仪器科学与技术] TP2[机械工程—精密仪器及机械]