Qi Haiming, born in 1983. He received his B.S. and M.S. degrees from Harbin Institute of Technology in 2005 and 2007 respectively. Now he is studying for Ph. D degree in School of Electrical Engineering and Automation, Harbin Institute of Technology. His research interest is localization technique of pipeline robot.To whom correspondence should be addressed. E-mail: qhm0318@126. com