Ishikawa Shizuo

Title: The Innovations of Ishikawa Shizuo

Introduction

Ishikawa Shizuo is a notable inventor based in Kanagawa, Japan. He is recognized for his contributions to the field of ultrasonic measurement technology. His innovative work has led to the development of a unique ultrasonic velocity meter.

Latest Patents

Ishikawa holds a patent for an ultrasonic velocity meter. This device operates by repeatedly transmitting acoustic waves in the form of pulses at alternate time intervals. It receives reflected waves generated by these transmissions and reflected off an object. The invention forms first and second mixed waves by mixing the reception signal obtained from the reflected waves with two reference waves that have phases shifted 90 degrees from each other. It detects the phase difference between the present vectors representing the mixed waves and similar vectors obtained from preceding pulse transmissions. The device calculates the Doppler shift angle frequency using the formula ωd = Q/2TS.

Career Highlights

Throughout his career, Ishikawa has worked with prominent companies such as Hitachi Medical Corporation and Hitachi, Ltd. His experience in these organizations has contributed significantly to his expertise in ultrasonic technology.

Collaborations

Ishikawa has collaborated with notable individuals in his field, including Kageyoshi Katakura and Toshio Ogawa. Their joint efforts have further advanced the technology surrounding ultrasonic measurements.

Conclusion

Ishikawa Shizuo's contributions to ultrasonic measurement technology exemplify the impact of innovation in engineering. His patented ultrasonic velocity meter showcases his ingenuity and dedication to advancing measurement techniques.