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PVEH Harvester

PVEH Harvester
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Piezoelectric Vibration Energy Harvester Introduction Designed to harvest relatively high frequency vibrational energy inherent in rotating transmission systems and gearboxes, the MicroStrain® Piezoelectric Vibration Energy Harvester (PVEH™) provides a regulated 3.2 VDC output at ~30 mW from input vibrations of 1.5 g amplitude when tuned to 1000 Hz. Factory tuning is accomplished by changing mass and/or stiffness of a precision micro-machined frame, which resonates a piezoelectric stack in compression to create energy. PVEH™ provides an elegant and infinitely renewable source of power to replace conventional batteries in wireless sensor nodes. Integrating a compact harvester with leading-edge power conversion microelectronics and a super capacitor for energy storage, when sufficient energy has been stored, a nanopower comparator switch allows the wireless sensor node to draw power. This insures operation under conditions when ambient vibrations are at relatively low levels or are intermittent. Preli mina ry Features & Benefits System Overview • Produces 30mW @ 3.2 VDC with 1.5 g input vibrations @ 1000Hz. • Integrated 4-pin connector provides simple connection to sensor and flexibility for additional storage capacity. • Anodized aluminum housing with integrated ¼-28 threaded stud provides a light, rugged, easy to mount device. • Easily combined with MicroStrain® wireless sensors to provide multiple sensing options. • Leading-edge power conversion microelectronics and a super capacitor for energy storage provides stable DC power. Applications Provides maintenance free power sources for wireless sensors used for: • conditioned based maintenance (CBM) of rotary machinery • structural health monitoring (SHM) • HVAC • building automation • monitoring industrial processes PVEH™ is factory-tuned to the dominant vibration frequencies of the ambient environment and is directly mounted to the vibrating structure to create power. A power cable runs from PVEH™ to supply the power to the sensor node, which collects data (strain, load, torque, acceleration, temperature, humidity, etc.) and transmits these data wirelessly to a base station where it is collected, viewed and analyzed. Wireless sensor nodes that can be user-programmed to support relatively high data sampling rates in bursts as well as relatively low data sampling rates at intervals are good sensor choices, because energy is conserved with these approaches. Examples include MicroStrain® SG-Link®, TC-Link®, and G-Link® products. We also provide wireless vibration survey tools and customized energy harvesting wireless sensor solutions for your specific applications. Base Stations/Intelligent Aggregators* (PVEH) G-Link® vibrating structure WSDA® -ETH TC-Link® WSDA® -Base vibrating structure *Diagram does not represent a complete list of compatible nodes, base-stations and harvesters. For more information, go to www.microstrain.com Little Sensors, Big Ideas.®

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PVEH™ Piezoelectric Vibration Energy Harvester Specifications Operating temperature Power output Output voltage Energy storage Charge time from off (2.0 V) to On (4.8 V) Storage capacity Converter circuit input protected Buck/Boost with max input voltage of 5.5 VAC Device bandwidth -3 dB @ ±1 % from tuned frequency Acceleration range Mounting stud Preli mina ry Dimensions Housing material anodized aluminum Binder #09-3112-86-04 (see pinout below) 7931073504 or 7931093204 (90 deg): (see color code below) Connector Pinout Normalized PVEH Output Versus Frequency Pin 1 (brown): DC+(3.2 V) Pin 2...

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