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- W2617778569 abstract "High-speed videography has been used to collect vast amounts of knee kinematic data, however, this method is generally restricted by a relatively small motion capture volume and is expensive. Consequently, alternative methods should be explored. PURPOSE: To quantify sagittal-plane knee joint angles, using resistance changes from a high-deflection nanocomposite piezoresistive strain sensor. METHODS: Nickel coated carbon fiber and nickel nanostrands were cured in a silicone matrix, to create a piezoresistive strain gauge. This gauge was adhered to athletic tape and applied over the patella. The gauge data were collected (1027 Hz), using an RFduino microcontroller, on one male subject (age = 25 years; height 1.88m, weight 81.6 Kg), while he walked and ran at various speeds (3-7 MPH). Sagittal-plane knee angles were also measured using more traditional methods: VICON high speed cameras and Visual 3-D, and these angles were used to calibrate and the evaluate the joint angles obtained from the strain sensor. RESULTS: Output from the nanocomposite strain gauge appeared to show a one to one relationship between knee angle and change in resistance for angles 20 degrees or more during walking and running (Figure 1). Hysteresis was present in the sensor as it was being loaded and unloaded. CONCLUSIONS: Through appropriate non-linear models, the strain sensor data could be used to predict knee angles during walking and running, which would facilitate the inexpensive measurement of knee kinematics outside of the traditional biomechanics laboratory setting. Supported by NSF Grant CMMI1538447." @default.
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- W2617778569 date "2017-05-01" @default.
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- W2617778569 title "Mobile, Low Profile, and Inexpensive Knee Joint Angle Sensor" @default.
- W2617778569 doi "https://doi.org/10.1249/01.mss.0000517717.84912.26" @default.
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