ULTRASONIC APPARATUS AND METHOD FOR THE CONTROL AND MEASUREMENT OF THE TIME EVOLUTION OF PHYSICAL-CHEMICAL, BIOLOGICAL OR BACTERIOLOGICAL PHENOMENA

摘要

Ultra-sound method and apparatus for the control and measurement of the time evolution of physical-chemical and biological phenomena comprising the immersion into the medium or media (4) to be tested a test bar (3) in which ultra-sounds (2) are limited so as to collect in return secondary echoes (F2, F3) due to numerous reflection on the side face of the bar (3) in contact with the medium (4), the selection of one of the secondary echoes (F2) and the recording of the evolution in the time of the amplitude of this echo, which represents the evolution of the tested medium, particularly the setting of concrete or the curing of resin.