APPAREIL AUTOMATIQUE DE DETERMINATION CONTINUE DE COEFFICIENTS DE REFLEXION A PARTIR D'UN SIGNAL SISMIQUE

• Main Author: ROBERT HORN, AMOR DHAOUI ET PIERRE WACKHERR
• Format: Patent
• Language: French
• Published: 09.04.1982
• Subjects: ANALOGOUS ARRANGEMENTS USING OTHER WAVES; DETECTING MASSES OR OBJECTS; DETERMINING DISTANCE OR VELOCITY BY USE OF RADIO WAVES; GEOPHYSICS; GRAVITATIONAL MEASUREMENTS; LOCATING OR PRESENCE-DETECTING BY USE OF THE REFLECTION ORRERADIATION OF RADIO WAVES; MEASURING; PHYSICS; RADIO DIRECTION-FINDING; RADIO NAVIGATION; TESTING

L'INVENTION CONCERNE LA DETERMINATION DU COEFFICIENT DE REFLEXION DE COUCHES SEDIMENTAIRES.ELLE SE RAPPORTE A UN APPAREIL DANS LEQUEL UN CIRCUIT DETECTEUR 32 ALIMENTE DEUX CIRCUITS DE MESURE 34 ET 36 QUI SONT VALIDES PAR UNE COMMANDE 38 AFIN QUE LE PREMIER 34 RECOIVE UNE PREMIERE PARTIE DU SIGNAL SISMIQUE ET LE SECOND 36 UNE SECONDE PARTIE DU SIGNAL SISMIQUE. LA POSITION DANS LE TEMPS ET LA DUREE DES PERIODES DE VALIDATION DES CIRCUITS DE MESURE 34 ET 36 PEUVENT ETRE REGLEES A VOLONTE, AFIN QUE, A LA SORTIE DU CIRCUIT 44 DE CALCUL, LE SIGNAL SOIT REPRESENTATIF DU COEFFICIENT VOULU DE REFLEXION.APPLICATION AUX OPERATIONS DE PROSPECTION SISMIQUE EN MER. The invention relates to the determination of the reflection coefficient of sedimentary layers. It relates to an apparatus in which a detector circuit 32 feeds two measuring circuits 34 and 36 which are validated by a command 38 so that the first 34 receives a first portion of the seismic signal and the second 36 a second portion of the seismic signal. The position in time and the duration of the periods for validating the measuring circuits 34 and 36 can be regulated at will, so that, at the output of the computing circuit 44, the signal is representative of the desired reflection coefficient. Application to seismic prospecting operations at sea.