A 3-axis accelerometer and strain sensor system for building integrity monitoring

J. Santana; R. van den Hoven; C. van Liempd; M. Colin; N. Saillen; D. Zonta; D. Trapani; T. Torfs; C. Van Hoof

doi:10.1016/j.sna.2011.11.017

A 3-axis accelerometer and strain sensor system for building integrity monitoring

J. Santana^*, R. van den Hoven, C. van Liempd, M. Colin, N. Saillen, D. Zonta, D. Trapani, T. Torfs, C. Van Hoof

^*Corresponding author for this work

Civil And Environmental Engineering

Research output: Contribution to journal › Article › peer-review

26 Citations (Scopus)

Abstract

An Ultra-Low-Power readout architecture for capacitive MEMS-based accelerometers and strain sensors is presented. The system can read both accelerometers and strain sensors in a half-bridge configuration. An accurate VerilogA model of the sensor was made to improve simulations. The gain of the system is controlled by integrating pulses from the excitation circuit allowing accurate control of the Signal-to-Noise ratio. A Figure-of-Merit of 4.41 × 10^-20 F√(W/Hz) was achieved for a sensor range of ±2.0 g and ±20,000 με over a 100 Hz bandwidth. A minimum of 440 nW power consumption was recorded. Residual motion artifacts are also cancelled by the system.

Original language	English
Pages (from-to)	141-147
Number of pages	7
Journal	Sensors and Actuators A: Physical
Volume	188
DOIs	https://doi.org/10.1016/j.sna.2011.11.017
Publication status	Published - Dec 2012

Keywords

bandwidth
integrated number of pulses
linearity
residual motion
sensitivity
Signal-to-Noise ratio

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10.1016/j.sna.2011.11.017

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title = "A 3-axis accelerometer and strain sensor system for building integrity monitoring",

abstract = "An Ultra-Low-Power readout architecture for capacitive MEMS-based accelerometers and strain sensors is presented. The system can read both accelerometers and strain sensors in a half-bridge configuration. An accurate VerilogA model of the sensor was made to improve simulations. The gain of the system is controlled by integrating pulses from the excitation circuit allowing accurate control of the Signal-to-Noise ratio. A Figure-of-Merit of 4.41 × 10-20 F√(W/Hz) was achieved for a sensor range of ±2.0 g and ±20,000 με over a 100 Hz bandwidth. A minimum of 440 nW power consumption was recorded. Residual motion artifacts are also cancelled by the system.",

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AU - Santana, J.

AU - van den Hoven, R.

AU - van Liempd, C.

AU - Colin, M.

AU - Saillen, N.

AU - Zonta, D.

AU - Trapani, D.

AU - Torfs, T.

AU - Van Hoof, C.

PY - 2012/12

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AB - An Ultra-Low-Power readout architecture for capacitive MEMS-based accelerometers and strain sensors is presented. The system can read both accelerometers and strain sensors in a half-bridge configuration. An accurate VerilogA model of the sensor was made to improve simulations. The gain of the system is controlled by integrating pulses from the excitation circuit allowing accurate control of the Signal-to-Noise ratio. A Figure-of-Merit of 4.41 × 10-20 F√(W/Hz) was achieved for a sensor range of ±2.0 g and ±20,000 με over a 100 Hz bandwidth. A minimum of 440 nW power consumption was recorded. Residual motion artifacts are also cancelled by the system.

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KW - integrated number of pulses

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KW - sensitivity

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A 3-axis accelerometer and strain sensor system for building integrity monitoring

Abstract

Keywords

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