Abstract
A thin-film lead zirconate titanate Pb(Zr, Ti)O3, MEMS Piezoelectric Micro Power Generator (PMPG) has been integrated with a commercial wireless sensor node (Telos) to enable a self-powered RF temperature sensor module. The PNMLPG and a power management module are designed to satisfy the sensor node's power requirement. An electro-mechanical model of PMPG has been developed to simulate the system and to maximize the power output. The second generation PMPG is designed to provide 0.173 mW power at 3 V DC with with 1 g excitation at 155.5 Hz. The power management module is developed to provide AC-DC rectification, energy storage, and active switching between the PMIPG and the application circuit. To optimize the power requirement, sensor data is taken at a discontinuous interval. A test bed is developed for testing autonomous sensors with a simulated condition of an Alaskan natural gas pipeline. Scaling factors, cost and robustness are considered in the test bed design.
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