Hiroshi Nakajima

Title: Hiroshi Nakajima: Innovator in Thermal Flow Measurement Technology

Introduction

Hiroshi Nakajima is a prominent inventor based in Nagoya, Japan. He has made significant contributions to the field of thermal flow measurement technology. With a total of 2 patents, Nakajima's work focuses on enhancing the efficiency and accuracy of sensor elements used in various applications.

Latest Patents

One of Nakajima's latest patents is a sensor element for a thermal type flowmeter. This innovative sensor includes a ceramic substrate, a thin film resistor made of platinum on the outer surface, and an outer protective layer of glass. The glass is formulated with Na₂O and K₂O in a total amount of up to 3 mol %. This design allows the sensor element to achieve a temperature coefficient of resistance that closely approximates the bulk value of platinum, ensuring minimal variation during fabrication.

Another notable patent is a resistor element with a thin porous metallic layer covered with glass. This resistor is designed for determining various parameters and consists of a ceramic support with a bearing surface. An electrically resistive metallic layer is formed on this surface, and a glass coating covers the metallic layer. The metallic layer features multiple pores extending from its outer surface to the bearing surface, with each pore having an area not smaller than that of a circle with a diameter of 1 μm. The average spacing between adjacent pores is not larger than 5 μm, enhancing the functionality of the resistor.

Career Highlights

Hiroshi Nakajima is currently employed at NGK Insulators, Inc., where he continues to develop innovative technologies. His work has significantly impacted the field of thermal flow measurement, showcasing his expertise and dedication to advancing engineering solutions.

Collaborations

Throughout his career, Nakajima has collaborated with notable colleagues, including Yasuhito Yajima and Fujio Ishiguro. These partnerships have fostered a creative environment that encourages innovation and the sharing of ideas.

Conclusion

Hiroshi Nakajima's contributions to thermal flow measurement technology through his patents and collaborations highlight his role as a key innovator in the field. His work continues to influence advancements in sensor technology, making a lasting impact on the industry.