Hirofumi Komatsubara

Title: Innovations by Hirofumi Komatsubara

Introduction

Hirofumi Komatsubara is a notable inventor based in Aichi, Japan. He has made significant contributions to the field of technology, particularly in the development of devices that measure stress and torque. With a total of 3 patents to his name, Komatsubara continues to push the boundaries of innovation.

Latest Patents

One of his latest inventions is a stress detector. This device includes an AC power source that generates an AC symmetrical waveform voltage. It features an exciting coil that alternately magnetizes a ferromagnetic material in a predetermined direction. A detecting coil is used to detect the magnetic flux generated due to this alternating magnetization. The adder circuit takes a part of the voltage applied to the exciting coil, setting its amplitude and phase to preset values. The output signal from the detector represents the value of stress applied to the material, varying either in amplitude or phase depending on the preset phase.

Another significant patent is a device for measuring the torque of a rotary mechanism. This torque sensor electrically detects torque, such as that of an automobile engine. It includes a strain disk in the path of torque transmission, where the torque is magnetically detected in terms of the magnetostriction generated in the strain disk. The sensor comprises a magnetic rotating disk and a magnetic sensor positioned near the strain disk. By supplying alternating current to the excitation coil, an alternating field is produced within the strain disk. The detection coil noncontactingly detects variations in the configuration of this alternating magnetic field, outputting an electrical signal from which the torque can be determined with high accuracy.

Career Highlights

Hirofumi Komatsubara is currently employed at Toyota Chuo Kenkyusho, a research and development company associated with Toyota. His work there has allowed him to collaborate with other talented individuals in the field of technology.

Collaborations

Some of his notable coworkers include Jun Sugiyama and Masaharu Takeuchi. Their combined expertise contributes to the innovative environment at Toyota Chuo Kenkyusho.

Conclusion

Hirofumi Komatsubara's contributions to the field of technology through his patents demonstrate his commitment to innovation. His work in developing devices for measuring stress and torque showcases the practical applications of his inventions.