Method for examining the interior material of an object

• Main Authors: LARS HÖRCHENS, STEVEN FERDINAND KLEIJER, XAVIER GEORGES JOSÉ DELEYE
• Format: Patent
• Language: English
• Published: 26.04.2018
• Subjects: INVESTIGATING OR ANALYSING MATERIALS BY DETERMINING THEIRCHEMICAL OR PHYSICAL PROPERTIES; MEASURING; PHYSICS; TESTING

A method for examining the interior material of an object from an outer surface of an object using ultrasound for example having a frequency of at least 100 kHz, wherein the method comprises the steps of: a. transmitting at least a first ultrasound signal by at least a first ultrasound transmitter of a predetermined group of ultrasound transmitters to the interior material of the object where in the interior material of the object reflections and/or diffractions of the first ultrasound signal occur, b. receiving reflections and/or diffractions of the first ultrasound signal from the interior material of the object using a plurality of ultrasound receivers of a predetermined group of ultrasound receivers which plurality of ultrasound receivers are acoustically coupled to the outer surface of the object at positions which are distributed in at least one dimension of the outer surface of the object, wherein, with each of the plurality of ultrasound receivers, a receiving signal is generated from the received reflections and/or diffractions of the at least first ultrasound signal from the interior material of the object, c. processing in combination the receiving signals generated by the plurality of the ultrasound receivers in order to determine, according to the principle of inverse wave field extrapolation , where in the interior material of the object reflections and/or diffractions of the transmitted first ultrasound signal occur; wherein, the object is provided with at least one predetermined reflection surface.