MEASURING DEVICE FOR A DRILLING APPARATUS

摘要

Measuring device (19) for a drilling apparatus (11) which comprises a series of drilling rods (19), rotary and axially mobile. The measuring device (10) comprises sensors (27), disposed on the series of rods (19), and feed devices (30) of the electromagnetic induction type, able to feed the sensors (27) electrically. Each of the devices (30) is connected to a feed source (28) and comprises a rotary element and a stator. A guide unit (25) is mounted on the apparatus (11), and a slider (34), on which the stator is supported, is able to slide on the guide unit (25) with an axial motion corresponding to that of the series of rods (19).