A friction nanogenerator sensor array for gait detection and a method of manufacturing the same

Abstract

The application discloses a friction nanogenerator sensor array for gait detection and a preparation method thereof. The sensor array comprises a shoe pad body and a plurality of sensing unit groups integrated in the shoe pad body; the plurality of sensing unit groups comprise a first unit group corresponding to a heel region, a second unit group corresponding to a metatarsal region and a third unit group corresponding to a toe region; each sensing unit comprises, from top to bottom, an upper friction layer, an upper electrode, a multi-degree-of-freedom elastic support body, a limiting frame, a lower electrode and a lower friction layer; the multi-degree-of-freedom elastic support body comprises a plurality of inclined columns and a central column distributed in a circumferential direction, and is used for realizing mechanical decoupling of a vertical force, bidirectional shear force and a torsional moment; and flexible isolation grooves are arranged between adjacent sensing units. Through the partition differentiated structure design, the multi-degree-of-freedom force-electricity decoupling and the inter-unit crosstalk suppression, the application solves technical problems such as multi-directional force coupling, contradiction between spatial resolution and comfort, poor long-term cycle stability and the like in gait detection, and realizes high-precision and high-durability monitoring of plantar mechanics space-time distribution.

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