  An additive manufacturing method is presented for embedding optical
fibre-based pressure sensors into the lining of sports helmets to monitor head
impact in contact sports. Proof-of-concept thermoplastic polyurethane (TPU)
helmet padding segments with embedded sensors are demonstrated for their
sensitive shock-monitoring capabilities. The system offers a cost-effective
solution for manufacturing consumer products at scale, is unobtrusive, and can
be powered by medical-grade cell batteries requiring low maintenance.
