Loading patent…
AssigneeCommissariat a l'Energie Atomique
InventorsJean Paul Falgari, Jean Perdijon, Bernard Voituriez
Estimating the term…
Apparatus for measuring the radial dimensions of a cylindrical tube by ultrasonics by means of which it is possible to measure the radial dimensions of said tube in directions perpendicular to the direction of the ultrasonic beam or beams emitted by one or more transducers, comprising a fixed ultrasonic transducer, whose emitting part is shaped like a cylindrical ring emitting ultrasonic pulses in accordance with a bundle of rays substantially parallel to the generating lines of the cylindrical tube, a truncated cone-shaped mirror whose apex angle is equal to 90.degree. and whose axis is parallel to the radii of the bundle of ultrasonic rays emitted by the transducer or transducers, a rotary shield having at least one opening arranged between the transducer and the tube whose radial dimensions are to be measured and means for collecting the ultrasonic echo returned by the tube and for measuring the time gaps separating the reception of said echos. A particular application is in nuclear power stations where tubes having precise dimensions are required in heat exchangers and for encasing fuel.
An apparatus for measuring the radial dimensions of a cylindrical tube by ultrasonics by means of which it is possible to measure the radial dimensions of said tube in directions perpendicular to the direction of the ultrasonic beam or beams emitted by one or more transducers, wherein it comprises a fixed ultrasonic transducer, whose emitting part is shaped like a cylindrical ring emitting ultrasonic pulses in accordance with a bundle of rays substantially parallel to the generating lines of the cylindrical tube and receiving echoes of said pulses, a truncated cone-shaped mirror whose apex angle is equal to 90.degree. and whose axis is parallel to the radii of the bundle of ultrasonic rays emitted by the transducer or transducers, a rotary shield having at least one opening arranged between the transducer and the tube whose radial dimensions are to be measured and means connected to said transducer for measuring the time gaps separating the reception of the ultrasonic echoes returned by the tube.
Dependencies are inferred from the claim text.