Shigeo Seki

Title: Innovations by Shigeo Seki

Introduction

Shigeo Seki is a notable inventor based in Iida, Japan. He has made significant contributions to the field of encoder technology, holding three patents that showcase his innovative approach to signal generation and detection.

Latest Patents

One of his latest patents is the encoder signal generating device. This device features a light receiving element constituted by a one-chip planar type phototransistor array with multiple light receiving portions. This design eliminates the need for an amplification circuit, allowing for a more compact and efficient multi-channel type device. The encoder signal generating device also boasts high sensitivity and excellent signal-to-noise (S/N) characteristics.

Another significant patent is the absolute signal detecting method and absolute encoder. This invention includes a code plate with an m-bit signal track that is read out in parallel to provide the starting position of an AC servo motor when power is first turned on. Additionally, it features an n-bit signal track that works in conjunction with an incremental signal track. This setup allows for the initial absolute value of the encoder to be established, which is then updated as the motor continues to rotate.

Career Highlights

Shigeo Seki is associated with Tamagawa Seiki Kabushiki Kaisha, a company known for its advancements in precision measurement and control technology. His work at this company has been instrumental in developing innovative solutions that enhance the performance of various systems.

Conclusion

Shigeo Seki's contributions to encoder technology through his patents reflect his commitment to innovation and excellence. His inventions not only improve the efficiency of devices but also pave the way for future advancements in the field.