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PVEH Harvester0 pages
PVEH
™
Data Sheet
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.
tApplications
Provides maintenance free power sources for wireless sensors
used for:
•t conditioned based maintenance (CBM) of rotary machinery
•t structural health monitoring (SHM)
•t HVAC
•t building automation
•t 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*
Nodes*
Harvesters*
(PVEH)
G-Link®
vibrating structure
WSDA® -ETH
TC-Link®
WSDA® -Base
SG-Link®
(MVEH)
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.®
www.microstrain.com
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