Patent ID: 8590381
Filing Date: 2013-11-26
Classification: G01N

Abstract:
1. An ultrasonic flaw detection equipment for performing a volume focusing flaw detection of a material being tested, the material having a substantially circular cross-sectional shape, the ultrasonic flaw detection equipment comprising: at least two array probes, each of the at least two array probes arranged along a surface of the material, each of the at least two array probes having a plurality of transducers, wherein the plurality of transducers of each array probe are arranged in an arc along a circle exhibited by the material being tested, and array probes are disposed so as to surround the material being tested; an exciting unit configured to excite each transducer of the array probes; a waveform memory configured to store an ultrasonic wave received echo received by each transducer as waveform data of each transducer; a phase combining unit configured to read contents of the waveform memory in which the waveform data of each transducer is stored and perform phase combining; and a focusing unit configured to provide, in reading from the waveform memory, an address of each waveform memory as an address corresponding to a beam path length of dynamic focusing for an arbitrary position in a pseudo electronic scanning range of a pseudo electronic scanning, wherein the ultrasonic flaw detection equipment is configured to transmit ultrasonic waves toward the material being tested from all the transducers of the array probes at a time, receive reflection echoes thereof by all the transducers, combine A scope waveforms of elements, the A scope waveforms being stored in the waveform memory, by the phase combining unit, and perform evaluation, wherein the ultrasonic flaw detection equipment is configured to perform a vertical flaw detection and an oblique flaw detection, for each array probe, the exciting unit is configured to excite the transducers to emit ultrasonic waves, the ultrasonic waves entering the material from an incident section, which is a section on a circumference of the circle exhibited by the material being tested, along which the array probe is placed, and reaching a counter section on the circumference of the circle exhibited by the material being tested, facing the incident section, so that the plurality of transducers are vibrated once for a first time and the vertical flaw detection is performed, and for each array probe, the exciting unit is configured to excite the transducers, while gradually shifting timing from one end of an arc exhibited by an array toward another end of the arc, to emit ultrasonic waves, the ultrasonic waves entering the material from the incident section and reaching one of adjacent sections adjacent to the counter section on the circumference of the circle exhibited by the material, so that the oblique flaw detection is performed and the plurality of transducers are vibrated once for a second time.