【摘要】 为了解决圆形封闭管道内散装固体物料流截面相浓度的实时测量问题 ,提出了一种新型有源栅极式截面相浓度检测方法 ,它可以有效地减少“位置效应”和“空间滤波效应”给测量精度和实时性带来的影响。设计研制了环形栅极式电容传感器及其变送电路。有限元数值分析及模拟各种流型的试验研究表明 :采用这种栅极探头可使检测截面的电容灵敏度变分参数SVP显著减少 ,流型变化对测量精度的影响较小。该方法是一种较理想的圆形封闭管道内气固两相流相浓度检测方法更多还原

【Abstract】 To solve the real time concentration profile measurement (CPM) of bulk solid material flow in pipeline, a new source grid CPM testing method was provided. By using this method, the influence of situation effect and spatial filtering effect on the measurement’s precision and real time characteristic can be effectively reduced. The numerical analysis of finite element and the dynamic simulated experiments of various flow regimes show that the CPM method is of higher accuracy and is practical.更多还原