Legal status (The legal status is an assumption and is not a legal conclusion. Google has not performed a legal analysis and makes no representation as to the accuracy of the status listed.)
Current Assignee (The listed assignees may be inaccurate. Google has not performed a legal analysis and makes no representation or warranty as to the accuracy of the list.)
Societe National Elf Aquitaine
Societe Nationale Elf Aquitaine Production SA
Original Assignee
Societe National Elf Aquitaine
Societe Nationale Elf Aquitaine Production SA
Priority date (The priority date is an assumption and is not a legal conclusion. Google has not performed a legal analysis and makes no representation as to the accuracy of the date listed.)
Filing date
Publication date
Application filed by Societe National Elf Aquitaine, Societe Nationale Elf Aquitaine Production SAfiledCriticalSociete National Elf Aquitaine
Priority to FR7700694ApriorityCriticalpatent/FR2377637A1/fr
Publication of FR2377637A1publicationCriticalpatent/FR2377637A1/fr
Application grantedgrantedCritical
Publication of FR2377637B1publicationCriticalpatent/FR2377637B1/fr
G01P—MEASURING LINEAR OR ANGULAR SPEED, ACCELERATION, DECELERATION, OR SHOCK; INDICATING PRESENCE, ABSENCE, OR DIRECTION, OF MOVEMENT
G01P13/00—Indicating or recording presence, absence, or direction, of movement
G—PHYSICS
G01—MEASURING; TESTING
G01S—RADIO DIRECTION-FINDING; RADIO NAVIGATION; DETERMINING DISTANCE OR VELOCITY BY USE OF RADIO WAVES; LOCATING OR PRESENCE-DETECTING BY USE OF THE REFLECTION OR RERADIATION OF RADIO WAVES; ANALOGOUS ARRANGEMENTS USING OTHER WAVES
G01S15/00—Systems using the reflection or reradiation of acoustic waves, e.g. sonar systems
G01S15/02—Systems using the reflection or reradiation of acoustic waves, e.g. sonar systems using reflection of acoustic waves
G01S15/04—Systems determining presence of a target
Landscapes
Physics & Mathematics
(AREA)
Engineering & Computer Science
(AREA)
Radar, Positioning & Navigation
(AREA)
Remote Sensing
(AREA)
General Physics & Mathematics
(AREA)
Acoustics & Sound
(AREA)
Computer Networks & Wireless Communication
(AREA)
Geophysics And Detection Of Objects
(AREA)
Length Measuring Devices Characterised By Use Of Acoustic Means
(AREA)
FR7700694A1977-01-121977-01-12Procede et dispositif utilisant les ultrasons pour detecter le passage d'un objet a l'interieur d'une canalisation
GrantedFR2377637A1
(fr)