Measuring and testing – Vibration – By mechanical waves
Patent
1990-03-02
1991-06-18
Williams, Hezron E.
Measuring and testing
Vibration
By mechanical waves
73644, G01N 924
Patent
active
050240935
ABSTRACT:
A fan-shaped scanning flaw detecting apparatus which includes a probe provided with an ultrasonic wave transmitting-and-receiving array transducer arranged along a circular arc and an acoustic lens for converging and converting an ultrasonic beam transmitted/received by the array transducer into a substantially parallel beam. The apparatus also includes a scanning function section that sequentially switches the transmitting and receiving operation of a group of operative transducer elements of the array transducer so as to make the ultrasonic beam perform fan-shaped scanning. A picturizing processor section forms a sectional image of an object to be examined on the basis of an echo signal obtained from the object to be examined and a display section displays the sectional image. A position detecting section detects a position where the ultrasonic beam is incident to the object to be examined when the probe is moved along a surface of the object to be examined. Image information of a sectional image of the object to be examined under a running path of the probe is formed by the picturizing processor section on the basis of two types of information, a first type representing the position of the ultrasonic beam incident to the object to be examined, which is obtained from the position detecting section, and a second type of information representing a position and relection intensity of the reflection source inside the object to the be examined, which is obtained on the basis of a reflection signal of a transmitted ultrasonic pulse reflected by the reflection source. The sectional image information is then read and displayed by the display section.
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Kino Hirotoshi
Kubota Jun
Musha Yoshinori
Okada Hisao
Sasaki Souji
Arana Louis M.
Hitachi , Ltd.
Williams Hezron E.
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