Development of asphalt mixture image automatic measurement system

There is a shortage in means of measurement on asphalt mixture's microstructure currently.To solve this problem,this paper provides a method for asphalt mixture microstructure's standard image acquisition,and imple-ments the system.The instrument bases on linear CCD and the erected turntable controlled by host PC to perform,which can acquire the asphalt mixture's images and extract the image features based on this system.This paper de-scribes the instrument's designs,operating principle and implementation both in software and hardware.The asphalt mixture core specimens' images were acquired successfully in the experimental tests without distortion.This sys-tem verifies the physical meaning as a standard reliable measurement by analyze the images' features with the air voids rations of the asphalt mixture core specimens.