边界层分离点实时检测方法  

Real-time Detection Method of Boundary-layer Separation Point

作　　者：齐勇[1] 马炳和[1] 邓进军[1] 苑伟政[1] 

机构地区：[1]西北工业大学微/纳米系统实验室,陕西西安710072

出　　处：《仪表技术与传感器》2007年第7期59-61,共3页Instrument Technique and Sensor

基　　金：国家自然科学基金(90305017);航空基金(04I53074;03I53066)

摘　　要：微型剪应力传感器以尺寸小、时空分辨率高的特点在边界层分离点测量中表现出了突出的优势。通过分析用于检测流体参数的微型热敏剪应力传感器的工作原理,设计了柔性热敏剪应力传感器阵列和恒流驱动电路。使用DAQPCI6024E及LabVIEW软件完成数据采集与实时信号处理,并提出采用均值变化量判断分离点的位置。风洞试验结果表明:该方法可行有效,可精确确定边界层分离点的位置。Micro-shear stress sensor plays an important role in detecting separation point of the boundary layer due to small-scale structures and the desired spatial and temporal resolution. In order to detect the location of the separation point of the boundary layer successfully, a flexible shear-stress sensor array was developed, constant current bias circuit was designed. Using DAQ PCI6024E and Lab- VIEW software achieves data acquisition and real-time signal processing, mean algorithm was developed to automatically detect the location of the separation point of the boundary layer. Wind tunnel test result showed the system meets high-speed and real-time measurement, can determine the location of the separation point of the boundary layer,

关 键 词：微剪应力传感器阵列 分离点 恒流驱动电路 实时处理 

分 类 号：TP212[自动化与计算机技术—检测技术与自动化装置]