Smart shoes

Ian Welch at the University of Denver is using shoe-mounted sensors to monitor weight distribution and gait.


Ian Welch never planned to get into biomechanics, and he certainly never expected to go into business.


But with Associate Professor Corinne Lengsfeld and Dean Rahmat Shoureshi of Denver University’s (DU)’s School of Engineering and Computer Science, the grad student helped develop a new product, and DU is applying for a federal patent and may start up a new company to market the invention.


The invention is a solution to a problem doctors had with their elderly patients falling due to surgery, medication or frailty. Welch’s idea: using shoe-mounted sensors to monitor weight distribution and gait.


The sensors — mounted on a paper-thin pad inside shoes — gather data from the wearer and provide feedback to researchers via radio waves. Ideally, wearers won’t even be aware the device is in the shoe. Radio transmitters, computer memory and other electronics are hidden inside the sole.


Doctors could use the data transmitted back to help patients understand balance and gait, and avoid falls.


Shoureshi said that eventually, the sensors could transmit data to a real-time warning system that would alert the patient if he or she was losing balance or about to fall. The device could help some patients learn to walk all over again.


Other applications for the shoe sensors include helping doctors monitor diabetics who suffer circulatory problems in their feet. A system could warn of fluid buildup even before ulcerations that plague some diabetics can form. Shoureshi has even more ideas about alternative, perpetual power sources for the sensors that would eliminate the need for batteries.


The sensor idea started as a senior project for Welch and other students under Lengsfeld’s supervision. But when Welch graduated, he wasn’t ready to give up his research on the sensors. Instead, he offered to work on the design for free at DU over the summer.


Lengsfeld saw that Welch was on to something and offered him a full-time research job if he would stay on and get his master’s degree, which he did.


The next step, he said, will come after he graduates this summer with his master’s degree in electrical engineering. He is working with DU to found a private company – with close ties to the University – to develop applications for commercial use.