摘要
讨论了热式质量流量计的特性曲线，着重对其ＵｂＶ（电桥电压流速）特性曲线和ＩＵｂ（输出电流电桥电压）特性曲线的函数形式及其拟合方法进行了研究。提出了ＵｂＶ特性曲线的一般描述方程，并运用以正交多项式为基的最小二乘法成功地进行了高次曲线的精确拟合。
In this paper,the characteristics of thermal mass flow meters and their curve fitting are discussed with focused on the Ub V(Bridge Voltage Velocity)and the precise curve fitting of high order curve using least squares algorithm based on orthogonal polynomials. Developing of Pretreatment Unit of On Line Mass Spectrograph Wang Dezhou (Lunan Chemiceal Fertilizer Plant,Tengzhou,Shandong,277527) The requirement of on line mass spectrograph for sample gas is given out.The shortcomings of original pretreatment unit are analyzed.It is satisfied for the requirement of production technics after three developed measures were put into effect.
出处
《化工自动化及仪表》
CAS
北大核心
1996年第6期37-41,共5页
Control and Instruments in Chemical Industry
