The tiny (5 x 5mm) sensor incorporates multiple 3D magnetometer “pixels” and is designed to be used in conjunction with a magnet embedded into an elastomer material. It has a soft contact interface, similar to human skin. Even small amounts of force will generate a response.
The sensor is said to be immune from stray magnetic fields that could result in errors. It is also tough enough to cope with harsh conditions. Unlike optically-based tactile sensors, the sensor is completely integrated. It will be possible to produce high volumes of factory-calibrated sensors using semiconductor manufacturing processes, resulting in cost and reliability benefits.
“Robots need a sense of touch to manipulate fragile objects,” explains Melexis’ global innovation manager, Gael Close. “For such applications, we have developed a novel magnetic sensor to accurately measure the contact force – while being robust.
Melexis’ 3D tactile sensor works in conjunction with a magnet
“By exploiting the capabilities of our Triaxis magnetic sensor technology, we have made a significant step forward in robot tactile sensors, providing a rugged and competitive multi-axis sensing solution,” he adds. “We will now use the Tactaxis prototype as the foundation for further development work.”
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