Apparatus for investigating media by ultrasonic echography

摘要

ultrasound exploration system environments, ultrasonichaving at least one ultrasonic transducer (10) with a floor (60) to show multiple ultrasonic signals and a floor (100)200) for receiving ultrasound echoes corresponding to the main obstacles encountered in the direction of propagation of the signals.the receiving circuit includes a first stage of processing (100) standard and, at the same time on it.a second circuit (200) comprises processing a series of circuit (210) for automatic gain control as a function of the distance of the echoes.a circuit (220) for correction of diffraction effects.a selection circuit (230), a thin band of frequencies centred on a frequency fc, and included in the bandwidth of the transducer, and a logarithmic amplifier (250).and a separator in the cf (260) whose output is sent to a second circuit path of the display device (100).