To accurately predict the meter factor of turbine flow sensor by non-experimental calibration and to get its internal flow field information,five kinds of turbulence models,including S-A,standardk-ε,RNGk-ε,Realizablek-ε and standardk-ω model were used respectively in simulation of turbine flow sensor.
为了能够采用非实流标定方法来准确预测涡轮流量传感器的仪表系数以及获得传感器内部流场流动情况,分别应用S-A、标准k-ε、RNGk-ε、Realizablek-ε以及标准k-ω5种湍流模型,对涡轮流量传感器内部流场进行三维数值模拟,并将应用各湍流模型得到的仿真仪表系数与实流标定值进行对比和分析。
In order to study the operating principle of tangential type turbine flow sensor,the rotor driving torque was deduced and the meter factor was given.
为深入研究切向式涡轮流量传感器的工作机理,推导了流体对涡轮叶片的驱动力矩,得出切向式涡轮流量传感器仪表系数的数学表达式。
The relation between the meter factor and flow rate for various dual bluff body combinations is investigated.
研究了不同组合双钝体的仪表系数—流量关系,通过压力损失分析,得到线性度及压力损失皆佳的一组钝体组合。
Design of Embedded Interface Based on M-BUS;
基于仪表总线的嵌入式接口设计
This paper introduces a kind of design scheme with the application of M-bus to concentrated oxygen supply data acquisition and measurement.
一种用仪表总线实现的集中供氧数据采集计量系统的设计方案,提出了集成各种消耗类表计设备及各个公司产品的方法和思路,具体实施案例表明:M-bus组成的数据采集系统可以应用于医院集中供氧数据采集计量。
In order to meet the demands of concentrated management of intellectualization,according to the communication protocol of the M-Bus,the temperature measuring & controlling system of buildings based on meter-bus is designed and implemented.
针对楼宇温度测控系统实现智能化集中管理的需要,依据M-Bus通信协议,采用TI公司的新型仪表总线专用收发芯片TSS721A及超低功耗的MSP430系列单片机,设计并实现了一种基于M-Bus的楼宇温度测控系统。