DETECTION METHOD AND SYSTEM IN PARTICULAR FOR MONITORING INSTALLATIONS OR AUTOMATIONS

摘要

METHOD AND SYSTEM FOR DETECTING THE PRESENCE, ABSENCE OR VARIATION IN THE POSITION OF A BODY SUCH AS A METAL OBJECT, USING OR INCLUDING A SENSOR 1 COMPRISING AN OSCILLATOR 2 CAPABLE OF GENERATING AN ELECTROMAGNETIC FIELD, A DETECTOR 3 IN ITS NEIGHBORHOOD CAPABLE OF DETECTING VARIATIONS IN THE AMPLITUDE OF THE ELECTROMAGNETIC FIELD FOLLOWING A MOVEMENT OF THE BODY 4 AND A MODULATOR 7 CAPABLE OF MODIFYING THE MODULATION OF THE OSCILLATOR OSCILLATIONS 2 FOLLOWING AN ORDER OF THE DETECTOR 3 AS WELL AS AN OPERATING DEVICE 5 COMPRISING A RECEIVER 8, A DECODER 10 OF THE RECEIVED SIGNALS AND A SEQUENCER 11 IMPOSING THE RATE OF MONITORING OF THE RECEIVER 8. THE TRANSMISSION BETWEEN OSCILLATOR 2 AND RECEIVER 8 IS CARRIED OUT BY RADIOELECTRIC OR ELECTROMAGNETIC ROUTE.