Researchers at ETH Zurich, Empa and EPFL have developed innovative 3D-printed insoles with integrated pressure sensors that can measure the pressure on the sole of the foot directly in the shoe during various activities.
This invention eliminates the need for pressure sensitive mats, which are limited to confined spaces and do not allow for measurements during workouts or outdoor activities.
The new insoles can identify different activities, such as walking, running and stair climbing, based on pressure patterns.
Smart soles
Templates, sensors, and leads are produced in one step with a single 3D printer, making them easy to manufacture. The researchers used a mixture of silicone and cellulose nanoparticles for the stencil base, silver conductive ink for the conductors, and carbon black ink for the sensors. The sensors are strategically placed where the pressure on the sole of the foot is greatest and are protected by a layer of silicone.
Piezoelectric components are used as sensors to measure normal and shear forces, converting mechanical pressure into electrical signals. The researchers have also incorporated an interface into the sole to read the generated data. Currently, a wired connection is required to read the data, but the team plans to develop a wireless connection in the future.
good for physical therapy
These 3D-printed insoles with integrated sensors have strong market potential, especially in elite sports. They can be used by athletes or in physiotherapy to measure training progress, make adjustments to training plans and produce permanent shoe insoles with different hard and soft zones using 3D printing.
Although no commercialization steps have yet been taken, this invention holds great promise for improving athletes’ performance and physiotherapy results.
Come and tell us your opinion on our Facebook, Twitterand LinkedIn Pages, and don’t forget to sign up for our weekly Additive Manufacturing newsletter to get the latest stories delivered straight to your inbox.
Leave a Reply