Introduction: Koichiro Nagata, based in Mito, Japan, is a notable inventor with a significant contribution in the field of device monitoring technology. With a total of 13 patents to his name, his innovative work is reflective of his expertise and dedication to improving device monitoring systems.

Latest Patents: Among his latest patents, Nagata has developed two key inventions: a device monitoring device and a device monitoring method. The primary aim of the device monitoring technique is to minimize restrictions on its application to existing devices, enabling effective monitoring even during variable speed operations or under fluctuating load conditions. One of his representative inventions efficiently monitors a device system using an AC electric motor driven by an inverter. This system incorporates a torque current estimation unit that acquires information about the AC currents of at least two phases and the excitation current of the AC electric motor. This is used to calculate the torque current estimated value of the motor. Furthermore, a state estimation unit helps to ascertain the condition of the device system based on extracted feature amounts from the torque current estimated value.

Another significant patent involves a transmission device monitoring system designed to enhance diagnostic accuracy. This system includes a diagnostic frequency estimation unit that extracts diagnostic frequency candidate groups from a specific frequency region using information regarding the current on a motor, the gear ratio of the transmission device, and the number of stages of the device. Additionally, it has an abnormality diagnosis unit that utilizes the estimated diagnostic frequency to assess any abnormal conditions in the transmission device.

Career Highlights: Koichiro Nagata has established a distinguished career, having worked with renowned companies such as Hitachi, Ltd. and Hitachi Industrial Equipment Systems Co., Ltd. His experiences at these companies contributed to his rich understanding of device monitoring technologies and the intricacies of related applications.

Collaborations: During his career, Nagata collaborated with notable coworkers including Toshiaki Okuyama and Shigetoshi Okamatsu, both of whom undoubtedly contributed valuable insights and expertise to his innovative projects.

Conclusion: Koichiro Nagata's contributions to device monitoring technology exemplify his innovative spirit and his commitment to solving complex challenges in this field. With a strong portfolio of patents, his work continues to influence the standards of device monitoring, driving advancements that benefit various industries.

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