APPARATUS AND METHOD FOR NON-CONTACT FOLLOWING AN ELECTRICAL CHARACTERISTIC SUCH AS THE IMPEDANCE OF A SUBSTANCE PRESENT IN A SELECTED SITE OF INVESTIGATION

摘要

THE INVENTION CONCERNS AN APPARATUS AND A METHOD FOR NON-CONTACT FOLLOWING VARIATIONS IN THE IMPEDANCE OF A SUBSTANCE PRESENT IN A DETERMINED AREA OF INVESTIGATION. / P P THIS APPARATUS HAS A BIDIRECTIONAL ANTENNA 12 WHICH PRODUCES AN ELECTROMAGNETIC BEAM COMPRISING TWO FIREPLACES ONE OF WHICH IS LOCATED NEARBY IN THE IMMEDIATE AREA OF THE AREA OF INVESTIGATION. A RECEIVER 14, PLACED NEAR THE OTHER FOCUS, IS CHECKED SO THAT VARIATIONS IN ELECTRICAL CHARACTERISTICS APPEARING IN THIS RECEIVER 14 CAN BE INTERPRETED AS INDICATIONS OF IMPEDANCE VARIATIONS APPEARING IN THE AREA CHOSEN. / P P FIELD OF APPLICATION: MEDICAL DIAGNOSTICS, RESEARCH AND DETECTION OF DEFECTS IN METALLIC PARTS, ETC. / P