Takahide Sakamoto

Title: Takahide Sakamoto: Inventor in Precision Inspection

Introduction

Takahide Sakamoto is an inventor based in Minoo, Japan. His work includes technologies for measuring zirconium liner thickness and detecting flaws in metal products. He is associated with Sumitomo Metal Industries, Inc. His patent portfolio includes 5 patents.

Latest Patents

Sakamoto’s listed patents address precision measurement and inspection using eddy-current techniques.

“Zirconium Liner Thickness Measuring Method and an Apparatus Therefor” describes a method and apparatus for measuring the thickness of a zirconium liner inside a zirconium-alloy tube. Coils inserted into the tube generate eddy currents, and the system analyzes impedance components to determine liner thickness. It also accounts for changes in the distance between the coils and the tube surface, correcting the measurement when that variation affects the signal.

“Rotary Probe Apparatus for Detecting Flaws in a Test Object” concerns inspecting the outer surfaces of round products, including steel bars, wire, and pipes. The apparatus rotates a non-contact probe around the object and uses lift-off measurements to align the probe’s rotational axis with the object’s axis. Its signal-processing approach helps reduce the effects of lift-off variation, supporting more accurate flaw detection.

Career Highlights

Sakamoto’s listed inventions focus on industrial inspection and measurement. They apply eddy-current sensing to address practical challenges such as measuring a liner within a tube and detecting surface flaws in round metal products.

Collaborations

Sakamoto’s listed coworkers include Tatsuo Hiroshima and Toshio Shiraiwa. His work is associated with Sumitomo Metal Industries, Inc.

Conclusion

Takahide Sakamoto’s patent work reflects a focus on improving the accuracy of metal inspection through eddy-current measurement, signal correction, and probe-position control.