Junpei Tamura

1Pa-12 3D Location Estimation of Drill-bit for HDD Method Using Giant-magnetostrictive Vibrator(Poster Session)

Youhei Kawamura, Koichi Mizutani, Hirokazu Okawa, 2010 .

A Study for Estimating the 3D Location of the Drill-Bit during Horizontal Directional Drilling using “Vibro”

Youhei Kawamura, Naoto Sasaki, Hirokazu Okawa, 2011 .

A Method for Estimating the Location of the Drill-Bit During Horizontal Directional Drilling Using a Giant-Magnetostrictive Vibrator

Youhei Kawamura, Hirokazu Okawa, Koichi Mizutani, 2011 .