land the detection device in proximity of a machine comprising a protective shield

THE INVENTION CONCERNS A DEVICE FOR DETECTION OF THE STATE OF LAND AT MACHINE WITH PROTECTIVE SHIELD INVENTION INCLUDES DEVICE. A transceiver 101 EMITTING ELECTROMAGNETIC PULSE INTO THE BASEMENT 2 dIGGING AND rECEIVING the reflected pulses AT THE INTERFACE BETWEEN TWO DIFFERENT MATERIALS ELECTRICAL PROPERTIES; SENSOR POSITION 102 of the transceiver; A PRETREATMENT UNIT SIGNAL 103; A THIS TRANSMISSION DEVICE 104 SIGNAL PROCESSING UNIT AND CONTINUOUS 3 DELIVERING THE STATE OF BASEMENT 2 NEAR THE FRONT CUTTING MACHINE PROTECTION 1. THE INVENTION S ' APPLY INCLUDING THE DETECTION OF STATE LAND SURROUNDING DIGGING MACHINE WHEN DRILLING TUNNEL.