Classification Of Ultrasound Probes

1. Straight probe: single crystal longitudinal wave straight probe double crystal longitudinal wave straight probe.

2. Oblique probe: single crystal shear wave oblique probe a1<aL<aⅡ, double crystal shear wave oblique probe

Single crystal longitudinal wave oblique probe aL<a1 is a small angle longitudinal wave oblique probe.

aL is a creeping wave probe near a1; the longitudinal wave transmitted along the surface of the workpiece has fast speed, high energy, long wavelength, and the detection depth is deeper than that of the surface wave, and the surface finish of the workpiece is required to be looser than that of the surface wave.

3. Probe with curvature: circumferential curvature radial curvature.

The circumferential curvature probe is suitable for the detection of axial defects such as seamless steel pipes, straight seam welded pipes, cylindrical forgings, and shaft workpieces. When the diameter of the workpiece is less than 2000mm, the axial curvature of the probe needs to be ground to ensure good coupling.

The radial curvature probe is suitable for the detection of radial defects such as seamless steel pipes, butt welds of steel pipes, cylindrical forgings, and shaft workpieces. When the diameter of the workpiece is less than 600mm, the radial curvature needs to be ground to ensure good coupling of the probe.

4. Focus the probe: point focus line focus.

5. Surface wave probe: (when the incident angle of the longitudinal wave is greater than or equal to the second critical angle, the refraction angle of the shear wave is equal to 90 to form a surface wave). The shear wave transmitted along the surface of the workpiece has slow speed, low energy and short wavelength. The detection depth is higher than that of creeping waves. Shallow, the requirements for the surface finish of the workpiece are stricter than those of creeping waves.