Korea Institute of Machinery and Materials Develops Ultra-Miniature 3-Axis Magnetic Sensor

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Korea Institute of Machinery and Materials Develops Ultra-Miniature 3-Axis Magnetic Sensor

Published2026.10.06 09:21

500㎛ size with 3x improved vertical direction sensitivity, targeting application in robotics and wearable fields

An ultra-miniature 3-axis magnetic sensor capable of simultaneously measuring magnetic fields in three directions using a flux guide based on superparamagnetic nanoparticles has been developed by domestic research teams. A key feature is the ability to perform repetitive measurements without a separate reset circuit and significantly enhanced sensitivity compared to existing products, with applications expected in precision sensing fields such as robotics and medical devices.

The research team at the Biomechanics Laboratory of the AI Robotics Research Institute at the Korea Institute of Machinery and Materials, led by Senior Researcher Oh Sun-jong, announced on the 6th that they have developed an ultra-miniature 3-axis magnetic sensor capable of measuring magnetic fields in three directions: x, y, and z.

The sensor was fabricated at 500㎛×500㎛ in size, improving vertical direction magnetic field sensitivity by approximately 3 times compared to existing products and enhancing magnetic field conversion efficiency by up to 40%.

The research team applied a superparamagnetic nanoparticle-based flux guide to the sensor to improve magnetic field conversion efficiency.

The design enables repetitive magnetic field measurement while eliminating the reset circuit that was required in existing sensors.

Achieving both ultra-miniature size and low-power operation simultaneously is also noted as a key characteristic of this technology.

The research team indicated plans to expand the sensor into a tactile sensor capable of detecting not only robot joint movements and fingertip motion but also pressing and pushing forces.

Future application fields being considered include △robot hands △soft robots △wearable devices △medical devices.

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