Application of median filter technique and ESP in PSP data processing

作     者：Zhang Yongcun is with School of Aeronautic Science and Engineering,Beijing University of Aeronautics and Astronautics,Beijing 100083,China,and with China Aerodynamics Research Institute of Aeronautics,Shenyang,110034,China Shang Jinkui is with China Aerodynamics Research Institute of Aeronautics,Shenyang,110034,China Ma Xiaoguang is with China Aerodynamics Research Institute of Aeronautics,Shenyang,110034,China.Zhao Min is with China Aerodynamics Research Institute of Aeronautics,Shenyang,110034,China. 

会议名称：《2011 Chinese Control and Decision Conference（CCDC）》

会议日期：2011年

学科分类：0810[工学-信息与通信工程] 08[工学] 080401[工学-精密仪器及机械] 0804[工学-仪器科学与技术] 080402[工学-测试计量技术及仪器] 0835[工学-软件工程] 081002[工学-信号与信息处理] 

关 键 词：optical pressure sensor pressure sensitive paint Electronically-scanned pressure median filter technique 

摘      要：In this paper,the application of PSP(Pressure Sensitive Paint) technique is described in wind *** a new optical pressure sensor technique,there are some problems needed to be solved,the big noise and SE(Systematic Error) in the PSP pressure measurement system are two of them,the median filter technique is applied to eliminate the big noise and ESP technique is introduced to decreased the *** gray value of the filtered pixel in the PSP image is determined by neighborhood of the pixel,so it preserves the correlation info contained in the pixels. PSP Processing System Software developed by ourselves is used for processing images by median filter technique,and comparison results between the raw data and the filtered data of PSP images is given,meanwhile,to a certain pressure test section,the Cp (Pressure Coefficient) data corrected by ESP data from PSP technique and the data from ESP (Electronically-scanned Pressure) technique are compared.