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Discussion of Dynamic Flow Measurement with Soft Sensor Method Based on Ultrasonic and Pressure Cross-correlation Method
Author(s): DENG Wen-liang, QIANG Bao-min
Pages: 59-
62
Year: 2009
Issue:
6
Journal: Hydraulics Pneumatics & Seals
Keyword: 动态流量; 超声波; 互相关法; 加权因子;
Abstract: 由于流量动态变化的机理和相应状态下流场的分布描述还不清楚,如温度、黏度的变化等对流量的影响,因而精确的动态流量模型还难以建立.针对存在的问题,利用超声波在流体中传播时加载了流体速度信息,结合压力互相关法,提出了在层流状态下,运用系数加权将两者综合进行非接触式流量软测量方法.避免了模型推导带来的误差,且不会造成压力损失,不影响流体状态,使系统具有较高测量精度和稳定性,并对影响系统精度的参数的标定方法...
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