Abstract: Disclosed is a method including the steps of defining a transmission sequence, in which a plurality of transmit transducers is uniformly and randomly selected among the transducers of a probe on the active surface of the probe and a time offset is uniformly and randomly defined for each transmit transducer over a predetermined transmission duration. Subsequently, the transmission sequence is transmitted in the medium by the plurality of transmit transducers, the reception signals are received and recorded and they are processed with a focal law suitable for the transmit transducers and the time offsets used in order to thus derive a level of detection.

Abstract: A device for the dimensional characterization of an object comprising a cylindrical surface which is symmetrical about a longitudinal axle. The device comprises at least six probes used to emit six pulsed waves, each probe being respectively oriented towards a separate measuring point of the cylindrical surface, and to collect the pulsed waves reflected at each measuring point. The device calculates a position of each measuring point, and calculates a characteristic curve of the cylindrical surface by interpolation from the corresponding position of each of the points.

Abstract: A device for the dimensional characterization of an object comprising a cylindrical surface which is symmetrical about a longitudinal axle. Said device comprises at least six probes used to emit six pulsed waves, each probe being respectively oriented towards a separate measuring point of the cylindrical surface, and to collect the pulsed waves reflected at each measuring point. Said device also comprises first means for calculating the position of each measuring point, and second means for calculating a characteristic curve of the cylindrical surface by interpolation from the corresponding position of each of said points.

Abstract: A method and a device for detecting discontinuities in a medium by detecting maxima, e.g. in an echo signal of an ultrasound excitation of the media, with maxima corresponding to a given discontinuity being grouped together as a function of coherence criteria applied to the maxima.

Abstract: The invention relates to a device that is used to analyse the structure of a material. The inventive device comprises: probe elements (5) which are used to (i) emit a wave, in the material, with emission delay laws that correspond to several simultaneous deviations and (ii) receive, on the different probe elements (5), signals from the refraction of said wave by the material; detection channels, each detection channel being connected to a probe element (5), in order to collect the refraction signals and to transmit same to data processing means (4); and delay circuits that apply a delay on each detection channel according to the reception delay laws which are predetermined and which correspond to the different deviations of the wave emitted. The invention also relates to an analysis method which can be used, in particular, on said device.

Abstract: A method and a device for detecting discontinuities in a medium by detecting maxima, e.g. in an echo signal of an ultrasound excitation of the media, with maxima corresponding to a given discontinuity being grouped together as a function of coherence criteria applied to the maxima.

Abstract: The invention relates to a device that is used to analyse the structure of a material. The inventive device comprises: probe elements (5) which are used to (i) emit a wave, in the material, with emission delay laws that correspond to several simultaneous deviations and (ii) receive, on the different probe elements (5), signals from the refraction of said wave by the material; detection channels, each detection channel being connected to a probe element (5), in order to collect the refraction signals and to transmit same to data processing means (4); and delay circuits that apply a delay on each detection channel according to the reception delay laws which are predetermined and which correspond to the different deviations of the wave emitted. The invention also relates to an analysis method which can be used, in particular, on said device.