کد مقاله کد نشریه سال انتشار مقاله انگلیسی نسخه تمام متن
749879 894856 2007 12 صفحه PDF دانلود رایگان
عنوان انگلیسی مقاله ISI
Development of capacitive pure bending strain sensor for wireless spinal fusion monitoring
موضوعات مرتبط
مهندسی و علوم پایه شیمی الکتروشیمی
پیش نمایش صفحه اول مقاله
Development of capacitive pure bending strain sensor for wireless spinal fusion monitoring
چکیده انگلیسی

A MEMS (microelectromechanical system) capacitive-based pure bending strain sensor is presented for use in spinal fusion monitoring. The sensor is designed to interface with a telemetry system that does not require a battery and contained in a housing that is attached to spinal fusion rods. The cantilever structure of the sensor is composed of two parallel plates with a narrow gap and a conjoint end. Nine permutations of the design with different metal coverage areas (14 mm2, 9.3 mm2 and 4.7 mm2) and gaps (3 μm, 6 μm and 7.4 μm) were examined. The nominal capacitance ranges from 7.6 pF to 42 pF. The capacitance changes 31.4–65.1% for a strain range of 0–1000 μɛ depending on the design parameters. An analytical model is developed for the sensor mounted to a cantilever test bar and compared to experimental results of actual devices. The model and experimental results show an average difference of 5% for all nine designs investigated. The final sensor design achieved a linear gauge factor of 252 and was fabricated for the spinal fusion application.

ناشر
Database: Elsevier - ScienceDirect (ساینس دایرکت)
Journal: Sensors and Actuators A: Physical - Volume 138, Issue 2, 26 August 2007, Pages 276–287
نویسندگان
, , , , , , ,