energy Xray transmission system

 

 

YANG Bin1, YE Wenhua1, XIONG Tianzhong1,2, 

MAO Donghui1, WANG Qiao1, HU Pinlong3

 

(1. College of Mechanical & Electrical Engineering, Nanjing University of Aeronautics and Astronautics,

 

Nanjing 210016, China; 2. College of Electrical & Automatic Engineering, Sanjiang University, Nanjing

 

210012, China; 3. Jiangsu Huahong Technology Stock Co.,Ltd., Jiangyin 214423, China)

 

 

Abstract: Aiming at the problem that the noise of the original dualenergy Xray transmission signal is very complicated and difficult to filter, the dualenergy Xray transmission signal acquisition and analysis system was established based on the operational principle of dualenergy Xray transmission separation technology. The sources and characteristics of background noise, isolated noise, circuit interconnect crosstalk noise and detection random noise contained in the original dualenergy Xray transmission signal were studied. The Gauss distribution of detection random noise, irregularity of isolated noise and the fixity of crosstalk noise between detection boards were researched, a new improved adaptive median filtering method based on the statistic of the neighborhood pixels was proposed. Dualenergy Xray transmission analysis experiment was tested on 6009 aluminum alloy block, the filtering effect of median filtering method and the proposed method was analyzed comparatively. The results indicate that the noise in the original dualenergy Xray transmission signal can be effectively filtered by the improved adaptive median filtering method.

 

Key words: dualenergy xray; noise; filtering; transmission