The four-dimensional (realtime three-dimensional) phased array ultrasonic testing system has been developed. The system enables realtime ultrasonic inspections using three-dimensional (3D) images as opposed to two-dimensional images obtained by the conventional phased array methods. In the system, objects are scanned volumetrica lly with focused beams generated by a matrix array probe and the results are displayed as 3D images in realtime through the conversion from measured data into voxel data using par...
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Four-Dimensional (Realtime Three-Dimensional) Phased Array Ultrasonic Testing

This study presents new phased array UT equipments, one is developed as portable type for field inspection and the other is developed for 2D-matrix array (3D Focus-UT ). The pulser of square burst wave was adopted for these new equipments to enhance flaw echo amplitude. At over 3 cycles of square burst cycle, the authors confirmed o ver 10dB enhancement of bottom echo amplitude. Moreover, a new flaw imaging method using S-SAFT was also adopted for equipments to improve SN ratio and flaw echo reso lution in...
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Development of Ultrasonic Inspection Equipment Using Phased Array Method

Ultrasonic Integrity of anchor bolts of nuclear power plants is evaluated using test bolts with 1.6mm and 3.2 mm EDM notches. All notches are detected by the following three ultrasonic testing methods: longitudinal normal beam method, hased array (sectorial scanning) method and 3-dimensional phased array method. It is effective in detection of notches to use visual images obtained by ultrasonic phased array m ethods. Additionally, 3D phased array technique can provide fast und wide evaluation of integrity ...
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Ultrasonic integrity evaluation of Anchor Bolts of Nuclear Power Plants

Abstract Structural health monitoring (SHM) techniques are needed to maintain the reliability of power plants for long term operation. The high temperature transducers are necessary to realize SHM (monitor wall thickness of the pipings, crack growth in the materials and material evaluation) under the working condition of power plants. We have evaluated lithium niobate (LiNb03) single crystal which is well known as a high Curie temperature piezoelectric material to develop high temperature ultrasonic transd...
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Development of High Temperature Ultrasonic Transducers

Ultrasonic testing techniques by using the three-dimensional (3D) phased array was investigated. The 3D phased array allows a target region to be scanned volumetrically with focused beams transmitted from a matrix array probe. This leads to an increase in inspection speed and easy-to-u nderstand inspection results displayed as 3D rendered images. This paper focuses mainly on synthesizing techniques of 3D scanned data obtained a t multiple positions when moving the probe. The technique is effective to figu...
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Three-Dimensional Phased Array Ultrasonic Testing

This study presents innovative 2D phased array inspection system “HITCHI 3D Focus-UT” for 3D volume inspection. This system employees (1) 3D ray-trace simulator to set-up the delay time for array elements and delay pattern for 3D volume scanning, (2) high sensitivity 256CH phased array equipment to drive a 2D matrix ar ray simultaneously and to obtain 3D volumetric data, and (3) high-speed 3D data processing software to convert 3D volumetric inspection data into 3D voxel data and display 3D inspection ima...
英字タイトル:
Development of 3-Dimensional Ultrasonic Testing System “3D Focus-UT”