直人 川瀬

TL;DR: In this paper, an image showing a beam route of ultrasonic waves and an image expressing a size of an ultrasonic signal in the periphery of the beam route by gradations are generated based on the echoes from the probe, which are displayed overlapping on an image of a three-dimensional geometric model of the inspection object.

TL;DR: In this paper, a method for discriminating the damaged part in the tested body from the eddy current test signal obtained in the EDD current test comprises a first step for extracting an aimed point with the EdD current signal above a predetermined value, a second step for finding a variant vector of the edd current signal within a signal range including the aimed point, a third step for adding the dimension of the variant vector in each direction of an n-dimensional direction vector, a forth step for converting the n dimensional characteristic vector into a smaller m-dimensional characteristic vector, and a

TL;DR: In this paper, the authors proposed a method to detect variations in an eddy current induced in an object to be tested by removing a low-frequency component from the test signal and performing comparison with a prescribed threshold.

TL;DR: In this article, the authors proposed a method to reduce the capacity of a memory which stores the parameters by cutting off the redundancy of the feature value, which is called feature value converting, where a main component axis calculating device calculates an average vector and a unit vector to be set in the main component axial direction from feature value vector of the sample data and stored these obtained vectors in a memory.

TL;DR: In this article, the authors proposed an ultrasonic signal processing system capable of easily and accurately detecting a flaw by using a TOFD (time of flight diffraction) method. But, this method is not suitable for the detection of defects.