[1] CHEN H X.Material transport in pipe and application[M].Beijing:China Chemical Industry Press,2003:1-5(in Chinese).
[2] DURAN O,ALTHOEFER K,SENEVIRATNE L D.Automated sewerpipe inspection through image processing[C]//IEEE International Conference on Robotics and Automation.Washington:IEEE,2002:2551-2556.
[3] ZHANG W W,ZHUANG B H.Non-contact laser inspection for the inner wall surface of a pipe[J].Measurement Science and Technology,1998,9(9):1380-1387.
[4] SUN L Zh,LU L H,QIN X J.Micro in-pipe robot for detection ofcracks in pipe wall[J].Optics and Precision Engineering,2003,11(1):11-16(in Chinese).
[5] CHENG W M,LI G D.In-pipe video detector for small pipes[J].Op-tics and Precision Engineering,2001,9(6):519-522(in Chinese).
[6] ZHAO P T,LI G H,PENG H D,et al.New design of optical activity measurement system[J].Laser Technology,2005,29(5):504-506(in Chinese).
[7] LIN L B,GAO X H,XIA J J,et al.Research of a novel 3-D laser scanning system[J].Laser Technology,2005,29(4):366-369(in Chinese).
[8] WU E Q,LI J X,KE Y L.3-D measurement of small diameter pipe inner wall[J].Journal of Computer-Aided Design & Computer Graphics,2005,17(1):151-154(in Chinese).
[9] WU X H.Study on the inner surface 3-D measurement technique of curved pipe and deep hole based on image[D].Hangzhou:Zhejiang University,2004:40-47(in Chinese).