Ultrasonic time-of-flight diffraction method by cylinder focusing wedge
A diffraction time difference method and wedge block technology, which is applied to the analysis of solids using sonic/ultrasonic/infrasonic waves, can solve problems such as the need to improve the detection sensitivity and the low energy level of the diffraction signal, and achieve the effect of improving the identification ability and avoiding the missed detection of defects.
Inactive Publication Date: 2012-06-20
HARBIN INST OF TECH
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An ultrasonic time-of-flight diffraction method by a cylinder focusing wedge relates to the field of ultrasonic detection and solves the problem that an existing time-of-flight diffraction method for detection is low in energy level of defective diffraction signals and needs improvement of detecting sensitivity. The ultrasonic time-of-flight diffraction method includes the specific steps: firstly, determining known conditions including the diameter of a probe wafer, the longitudinal wave velocity of the wedge, the longitudinal wave velocity of a detected workpiece and the velocity of longitudinal waves in water; secondly, setting needed conditions including the water path of an acoustic beam of a spindle, the refraction angle of longitudinal waves in the detected workpiece and the focusing vertical depth of the acoustic beam of the spindle in the workpiece; and thirdly, computing the curvature radius of a cylinder of the wedge according to the conditions and detecting by the ultrasonic time-of-flight diffraction method through the manufactured cylinder focusing wedge. The ultrasonic time-of-flight diffraction method is used for ultrasonic detection.
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Refraction angleEnergy level +5
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Property | Measurement | Unit |
Thickness | 10.5 | mm |
tensile | MPa | |
Particle size | Pa | |
strength | 10 |
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