US scientists have developed a sensor for the eyelids that accurately measures the level of fatigue
Researchers at the University of California in Los Angeles have created a soft autonomous sensor that is attached to the eyelid and tracks eye movements to determine the level of fatigue of a person. This is reported by NotebookCheck.
The device combines a new type of sensor with an artificial intelligence algorithm that analyzes data in real time. According to the test results, the measurement accuracy is 96.4%. The technology is based on the giant magnetoelastic effect in soft materials discovered in 2021 by the same team. This effect allows the polymer composite to convert mechanical pressure from the movement of the eyelid into a magnetic, and then into an electrical signal.
The design of the sensor includes a layer of silicone rubber with built-in micromagnets and a thin conductive gold coil coated on a thermoplastic elastomer. The device is stretchable, waterproof and designed to be worn directly on the eyelid. It converts eye movements into high-precision signals that are processed by a neural network.
The algorithm analyzes six parameters of blinking to determine the degree of fatigue of the user. The developers note that the discovery of the magnetoelastic effect in soft systems has great scientific potential, which has yet to be fully explored.
