کد مقاله کد نشریه سال انتشار مقاله انگلیسی نسخه تمام متن
7135843 1461867 2015 43 صفحه PDF دانلود رایگان
عنوان انگلیسی مقاله ISI
Triaxial ball-impact piezoelectric converter for autonomous sensors exploiting energy harvesting from vibrations and human motion
ترجمه فارسی عنوان
مبدل پیزوالکتریک برقی سه گانه برای سنسورهای خودمختار از بهره برداری انرژی از ارتعاشات و حرکت انسان
کلمات کلیدی
برداشت انرژی، مبدل پیزوالکتریک، مبدل چند درجه ای آزادی، مبدل سه شاخه، ضربه توپ، تکنیک فرکانس بالا، سنسور مستقل،
موضوعات مرتبط
مهندسی و علوم پایه شیمی الکتروشیمی
چکیده انگلیسی
A piezoelectric converter for energy harvesting composed of a rigid ball enclosed among six piezoelectric diaphragms arranged in a cube-shaped structure is presented. When the converter is excited by mechanical vibrations, the ball repeatedly bounces and hits one or more diaphragms, implementing the impact technique in a multi-degree-of-freedom configuration. The structure is isotropic thus the converter is effective irrespective of the vibration orientation. The converter is particularly suitable for energy harvesting from low-frequency random vibrations, such as those provided by human motion. The triaxial ball-impact piezoelectric converter was designed, built and experimentally characterized in the laboratory, and then tied to the ankle of a person and tested during physical activity. While the person is running at 7 km/h, a peak instantaneous power of up to 16 mW is provided by each of the six piezoelectric diaphragms, while the average power is significantly lower. The converter was coupled to a tailored power management circuit which intermittently powers a battery-less wearable temperature sensor module. In about 260 s of walking at 2 km/h, an energy of 1.4 mJ is extracted, stored into a 1-mF capacitor, and used to power the sensor module, which performs a temperature measurement and transmits the data to a receiver through a 433-MHz RF-UART link.
ناشر
Database: Elsevier - ScienceDirect (ساینس دایرکت)
Journal: Sensors and Actuators A: Physical - Volume 233, 1 September 2015, Pages 569-581
نویسندگان
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