CYLINDER UNIT AND MINE SENSOR

摘要

PROBLEM TO BE SOLVED: To directly measure the shape of matter buried under ground. SOLUTION: A mine sensor has a plurality of cylinder units. In the cylinder unit, a magnet 16 is assembled in a free piston 4 for feeding, by pushing the rod 2 by hitting the piston 3 having the rod 2 by impact, and the projected amount of the rod 2 is measured, based on signals from a Hall sensor 11 mounted at a cylinder tube and a force sensor 17 mounted at the distal end of the rod 2.