Alfred V Clark

Title: Alfred V Clark: Innovator in Ultrasonic Measurement Technologies

Introduction

Alfred V Clark is a notable inventor based in Boulder, CO (US), recognized for his contributions to ultrasonic measurement technologies. He holds a total of 4 patents, showcasing his innovative approach to stress measurement in materials.

Latest Patents

Clark's latest patents include an ultrasonic strain gage utilizing a motorized electromagnetic acoustic transducer (EMAT). This method and apparatus are designed for measuring stress in a specimen by employing a motorized EMAT. The technology leverages the rotation of pure-mode polarization directions of SH-waves, which results in a change in the phase of waves polarized along specific directions. The process involves a rotating small-aperture EMAT connected to a processor that measures phase and amplitude data as a function of angle. The EMAT is strategically placed on a workpiece at the stress measurement location. The acoustic birefringence B is determined from the normalized difference of these phases. An algorithm calculates values of B and &PHgr; after the workpiece is stressed or its stress state is altered. The values are then measured again at the same location, allowing for the determination of stress based on the change in B and &PHgr;.

Career Highlights

Throughout his career, Clark has worked with the Government of the United States of America, as represented by the Secretary of Commerce. His work has significantly impacted the field of ultrasonic measurement, particularly in stress analysis.

Collaborations

Clark has collaborated with notable individuals such as George A Alers and Thanh Nguyen, contributing to advancements in his field.

Conclusion

Alfred V Clark's innovative work in ultrasonic measurement technologies has established him as a key figure in the field. His patents reflect a deep understanding of stress measurement, showcasing his contributions to engineering and technology.