Abstract
This report focuses on a development of a 3-dimensional drag sensor. Three strain gauges and a nonmetal cylinder material constitute the sensor. The strain gauges are put on the side of the cylindrical material at intervals of 2π/3 radians. The strain gauges detect the deformation of the cylindrical material. In this report, we discuss the difference of the results caused by the difference of the position of the strain gauges put on the cylinder material. Moreover, the effectiveness of the sensor is examined through some experiments using the soft materials as the contact objects.