新型超声波流量计  

New Type of Ultrasonic Flowmeter

作　　者：严锦洲[1] 蒋念平[1] 

机构地区：[1]上海理工大学光电信息与计算机工程学院,上海200093

出　　处：《仪表技术与传感器》2014年第4期28-30,共3页Instrument Technique and Sensor

摘　　要：超声波流量计在流量测量中具有重要的应用,为了解决超声波流量计中测量精度不高的现象,设计了一种以EFM32TG110F32单片机为核心器件,用GP21测量超声波在液体中顺逆流时间,在数据处理中采用标定查表技术的一种时差法新型超声波流量计。在数据传输上采用非接触式的红外光学通信单元,测量装置简单,功耗底,测量精度高,误差不超过±1%。Ultrasonic flowmeter has important applications in the measure of flow, in order to solve the low precision of ultra- sonic flowmeter, a new type of ultrasonic flowmeter based on time difference method was designed. The EFM32TG110F32 MCU was applied as the unit,the GP21 was used to measure the time downstream and upstream of ultrasound in liquid, and it used verifying and table lookup technology in the handing of data. It used non-contacted infrared communication in data transmission, the design has the advantage of simple structure,low power dissipation and high precision measurement, the error is within ± 1%.

关 键 词：超声波流量计 标定 红外光学通信 GP21 时差法 

分 类 号：TP212[自动化与计算机技术—检测技术与自动化装置]