Evaluation of Force Sensing Resistors for the Measurement of Interface Pressures in Lower Limb Prosthetics.

摘要: Understanding pressure distributions at the limb-socket interface is essential to design and evaluation of prosthetic components for lower limb prosthesis users. Force sensing resistors (FSRs) are employed in prosthetics research measure this due their low cost, thin profile, ease use. While FSRs known be sensitive many sources error, few studies have systematically quantified these errors using test conditions relevant prosthetics. The purpose study was evaluate FSR accuracy measurement pressures. Two models (Flexiforce A201 Interlink 402) were subjected a series prosthetic-relevant tests. These tests included: (1) static compression, (2) cyclic (3) combined compression protocol mimicking variable activity (Walk-Sit-Stand) procedure. Flexiforce sensors outperformed then two additional tests: (4) curvature (5) shear stress. Results demonstrated that experienced significant all five We concluded that: if used carefully, can provide an estimate pressure, but measurements should interpreted within expected range possible error given setup; calibrated setup closely matches how they will taking measurements; both pressures, however most cases likely more accurate measurements.