Larger Area Pressure and Shear Measurement Using Optical Time Domain Reflectometer (OTDR)
Introduction Lower limb complications associated with diabetes include the development of plantar ulcers that can lead to infection and subsequent amputation. Several authors have postulated that shear stress is an important component of ulcer development. While it is known from force plate analyses that there are medial/lateral and anterior /posterior shear components of the ground reaction force, there is little known about the actual distribution of this force during daily activities, nor about the role that shear plays in causing plantar ulceration. Additionally, there are currently no flexible high-resolution sensors capable of measuring the distribution of both shear and pressure stress at the plantar surface. Technology description Researchers at the University of Washington have developed a larger area coverage pressure and shear stress sensor using an optical time domain reflectometer (OTDR). The pressure/shear sensor consists of two optical fibers or microfabricated waveguide structures laying in a snake like configuration separated by elastomeric pads. Implementing OTDR as a bending sensor can provide the same number of discrete pressure points similar to macrobend and polarimetric mesh sensors, while only consisting of two fibers. The sensor can be used as an in-shoe sole or matebased gait system to prevent and monitor the development of plantar ulceration. Business opportunity In addition to the prevention of foot ulcers, this technology can also be used in prosthetic arms or legs to monitor the pressure profiles on the joints and the prosthetic socket or as a sole sensor for artificial legs to provide ground profile information. For dental applications, this technology can be used for bite sensors and for orthodontal tooth movement profiles. The sensor can also be used in the monitoring of wear-and-tear of buildings, highway systems, bridges and dams and in embedded sensors for sports equipment to provide feedback and enhance the training of athletes. Intellectual Property Position This technology is available for licensing. For more information on this technology contact:Jim Roberts Business Development Officer [email protected] 206-616-1097
Type of Offer: Licensing
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