Low-Cost Portable Tread Scanner Quickly Identifies a Shoe’s Level of Slip Risk
Slips and falls are often caused by insufficient friction between the shoe and floor. The more worn the tread, the higher the risk for falling, which is why shoe tread is an important part of reducing slip risk. Research shows the size of the largest continuous tread, worn region size, (WRS) indicates slip risk. University of Pittsburgh researchers have identified a method and tool for detecting WRS to reduce falls. To operate the tool, an individual stands on a waveguide with one shoe and on a supplementary supporting surface with the other shoe. The shoe on the waveguide is scanned and the WRS detected. Its algorithm determines the slip risk based on the detection. The device offers an inexpensive, quick method for determining a person’s fall risk by examining their shoe treads.
Description
The scanner is contained within a small frame system that enables it to be portable. It uses frustrated total internal reflection (FTIR) to ensure that light is shone into a waveguide. When the shoe outsole meets the waveguide, the light reflects outward. This external reflection is detected via a camera that determines the size of the largest region of tread that is in contact with the waveguide. The tool measures the size of a continuous region of tread contact between a shoe outsole and walking surface, using multiple wavelengths of color to enable more robust function. It also offers adjustable angles of the waveguide, which can measure optimal heel worn region contact relevant to different types of gait tasks.Applications
· Shoe companies and manufacturers· Shoe retailers
· Doctors and clinics specializing in orthopedics
· Elderly population age 65 and older
Advantages
· Inexpensive· Quick method for determining slip risk