Image Processing Reference
In-Depth Information
11.5.1 PermaSense System Architecture
The PermaSense system architecture under tests is based on the Shockfish TinyNode platform [],
acustomdataacquisitionandpowerboard,abasestationcontainingasatellitemodem,specialized
Li-SOCl
batteries, packaged in an IP-rated protective steel enclosure. he software is based on an
application that samples sensors and transmits the data multihop to the base station using a synchro-
nized protocol with acknowledgments. his protocol uses an interleaved scheme of and min for
data transmission and synchronization messages, respectively and min synchronization intervals.
It has been designed to offer years lifetime based on the batteries used and depending on the influ-
ence of the environment and the amount of power used in the dominant communication. Overall
the system targets the ambitious goal of a duty cycle of .% and a mean current consumption per
node of less than µA.
11.5.2 PermaSense—Testing and Evaluation
After an inaugural development phase and a series of integration builds only using CI (see Fig-
ure .) a first number of test jobs for the PermaSense networking and communication component
were run on the testbed. his involved basic long-term power trending (see Figure .) and log file
(a) Overview of all nodes.
(b) Detailed view for a single TinyNode.
FIGURE .
Long-term trending of power consumption on a DSN testbed. Current and supply voltage are sampled
on every node.
