Reserve power sources are used extensively in munitions and other devices, such as emergency devices or
remote sensors that need to be powered only once and for a relatively short duration. Current chemical reserve
power sources, including thermal batteries and liquid reserve batteries sometimes require more than 100 msec
to become fully activated. In many applications, however, electrical energy is required in a few msec following
the launch event. In such applications, other power sources are needed to provide power until the reserve battery
is fully activated. The amount of electrical energy that is required by most munitions before chemical reserve
batteries are fully activated is generally small and can be provided by properly designed piezoelectric-based
energy harvesting devices. In this paper, the development of a hybrid reserve power source that is constructed
by integration of a piezoelectric-based energy harvesting device with a reserve battery to provide power almost
instantaneously upon munitions firing or other similar events is being reported. A review of the state of the art
in piezoelectric-based electrical energy harvesting methods and devices and their charge collection electronics
for use in the developed hybrid power sources is provided together with the results of testing of the piezoelectric
component of the power source and its electronic safety and charge collection electronics.
J. Rastegar and P. Kwok, "Piezoelectric-based hybrid reserve power sources for munitions," Proc. SPIE 10166, Industrial and Commercial Applications of Smart Structures Technologies 2017, 1016605 (Presented at SPIE Smart Structures and Materials + Nondestructive Evaluation and Health Monitoring: March 26, 2017; Published: 4 April 2017); https://doi.org/10.1117/12.2257827.
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