Kazumasa Sumi

Title: Innovations by Kazumasa Sumi: A Pioneer in Magnetic Sensing Technologies

Introduction

Kazumasa Sumi, an inventive mind hailing from Nagoya, Japan, has made significant strides in the field of magnetic sensing technologies. With a remarkable portfolio comprising nine patents, Sumi's innovations have helped pave the way for advancements in magnetic detection systems, with important applications across various sectors.

Latest Patents

Kazumasa Sumi's recent patents demonstrate his expertise in magnetic sensor technology. One of his notable inventions is a **magnetic sensor**, which includes a magnetic sensitive member made of amorphous wire, a detection coil wrapped around this member, and a sample-and-hold circuit for detecting voltage induced in the amorphous wire when a pulse current is interrupted. This intricate assembly features a sample-and-hold unit with electronic components, such as an electronic switch, capacitors, resistors, and a high-input amplifier, alongside a delay circuit that assists in the accurate detection of magnetic fields.

Another significant patent of his is the **magnetic field detection device**, which utilizes a frequency characteristic affording circuit to selectively detect magnetic signals at a high sensitivity level. This invention is equipped with a magneto-impedance element, a detector coil, and a negative feedback coil, enhancing its performance by accurately processing signals within various frequency domains. Applications of this device range from earthquake prediction systems employing high-pass filters to bill validation apparatuses for vending machines and magnetic oscillation detection systems.

Career Highlights

Kazumasa Sumi has had a distinguished career, primarily associated with two prominent companies: **Toyota Chuo Kenkyusho** and **Toyota Motor Corporation**. His tenure at these organizations has been marked by a commitment to advancing magnetic technologies, significantly contributing to their research and development efforts.

Collaborations

Throughout his career, Sumi has collaborated with esteemed colleagues, including Kazuo Miki and Katsuhiko Fukui. These partnerships have allowed for a synergistic exchange of ideas and expertise, further propelling innovations in the field of magnetic sensing.

Conclusion

Kazumasa Sumi's inventive work and dedication to advancing magnetic sensor technologies have solidified his reputation as a leading figure in this domain. With his growing portfolio of patents, he continues to inspire future inventors and research institutions in seeking innovative solutions to contemporary challenges.