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Copyright Timo Smits ? 2008 Elster Group All Rights Reserved. Elster and its logo, are trademarks of Elster Group Construction of the Q.Sonic Q.Sonic的构造 探头安装 Copyright Timo Smits ? 2008 Elster Group All Rights Reserved. Elster and its logo, are trademarks of Elster Group Construction of the Q.Sonic Q.Sonic的构造 SPU（信号处理单元） Copyright Ruogu.Zhang ? 2010 Elster Group All Rights Reserved. Elster and its logo, are trademarks of Elster Group * * Copyright Taylor.Zh ? 2010 Elster Group All Rights Reserved. Elster and its logo, are trademarks of Elster Group Copyright Ruogu.Zhang ? 2010 Elster Group All Rights Reserved. Elster and its logo, are trademarks of Elster Group * * Copyright Timo Smits ? 2008 Elster Group All Rights Reserved. Elster and its logo, are trademarks of Elster Group * Copyright Taylor Zhang ? 2011 Elster Group All Rights Reserved. Elster and its logo, are trademarks of Elster Group 超声流量计 Tn t + T Vn = V x x pabs pn Zn Z x 多种压缩因子的”计算方式” 1962: A.G.A Report NX-19 1988/1991: SGERG-88 GERG TM5 1997: ISO12213 AGA 8 + GERG (AGA 8 Full composition with up to 48 components) Copyright Taylor Zhang? 2011 Elster Group All Rights Reserved. Elster and its logo, are trademarks of Elster Group Elster-Instromet 公司超声流量计的发展历史 Ultrasonic expertise for more than 30 years: Copyright Timo Smits ? 2008 Elster Group All Rights Reserved. Elster and its logo, are trademarks of Elster Group Introduction ultrasonic meters 超声测量技术 绝对传输时间测量法 Copyright Timo Smits ? 2008 Elster Group All Rights Reserved. Elster and its logo, are trademarks of Elster Group Introduction ultrasonic meters 超声测量原理 Copyright Timo Smits ? 2008 Elster Group All Rights Reserved. Elster and its logo, are trademarks of Elster Group c c v v·cos? Di L ? Trd B Trd A send receive receive send v: average gas velocity c: velocity of sound (VOS) Introduction ultrasonic meters 超声测量原理 Introduction ultrasonic meters 超声测量原理 Copyright Timo Smits ? 2008 Elster Group All Rights Reserved. Elster and its logo
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