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- W2022392892 abstract "In this paper, we present a self-powered wireless sensor system for structural health monitoring of highway bridges. The system consists of an energy harvesting material, power conditioning circuitry, a sensor, an analog-to-digital converter, and a wireless transmitter. The energy harvesting material is a recently discovered NiMnCoIn magnetic shape memory alloy (MSMA), which converts mechanical vibrations first into a magnetization change and then, with assistance from a pick-up coil, into an alternating current (ac) output. The ac output of the MSMA is converted to a direct current (dc) voltage for powering a sensor and circuitry. Measurement results from a self-powered rectifier (SPR) and a six-bit successive approximation register analog-to-digital converter (SAR ADC) are presented, and implementation considerations are presented for the sensor and wireless transmitter. The SPR produces dc output voltages larger than 700 mV for loads larger than 100 kΩ with peak input amplitudes >;400 mV <sub xmlns:mml=http://www.w3.org/1998/Math/MathML xmlns:xlink=http://www.w3.org/1999/xlink>pk</sub> . A four-stage rectifier-multiplier is also implemented utilizing the proposed SPR as the first stage. The implemented SAR ADC is functional with a 0.9-V dc supply voltage ( <i xmlns:mml=http://www.w3.org/1998/Math/MathML xmlns:xlink=http://www.w3.org/1999/xlink>V</i> <sub xmlns:mml=http://www.w3.org/1998/Math/MathML xmlns:xlink=http://www.w3.org/1999/xlink>dd</sub> ) and achieves an improved performance with a <i xmlns:mml=http://www.w3.org/1998/Math/MathML xmlns:xlink=http://www.w3.org/1999/xlink>V</i> <sub xmlns:mml=http://www.w3.org/1998/Math/MathML xmlns:xlink=http://www.w3.org/1999/xlink>dd</sub> of 1.8 V, where the SAR ADC achieves a measured integral nonlinearity and differential nonlinearity of +1.2/-1.9 least significant bit and +1.3/-0.99 LSB, respectively. The SPR and SAR ADC are fabricated in a standard 0.5-μm CMOS process. The proposed sensor system can be fully optimized due to co-design capabilities. The lack of batteries makes this system ideal for deployment in bridge monitoring systems." @default.
- W2022392892 created "2016-06-24" @default.
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- W2022392892 date "2013-02-01" @default.
- W2022392892 modified "2023-09-27" @default.
- W2022392892 title "Low-Power Circuits and Energy Harvesting for Structural Health Monitoring of Bridges" @default.
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- W2022392892 doi "https://doi.org/10.1109/jsen.2012.2226712" @default.
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