Abstract
Pulsed ultrasound propagating in water was used at megahertz carrier frequencies (nominally 10-50MHz) to reflect and scatter from rough surfaces in the same way as light. We have considered noncontact ultrasonic techniques as complementary to optical techniques in several ways: (a) for specificapplications such as wet surfaces, (b) for rougher surfaces with average roughness, R(a) ≥ 0.1 µm, and (c) for (simultaneous) profilometry by time-of-flight measurements. Stylus and ultrasonic data are compared. An example of application to the manufacturing environment is for on-line, real-time sensor feedback and process control in the cutting or grinding of metals and ceramics.
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