% IMPORTANT: The following is UTF-8 encoded. This means that in the presence
% of non-ASCII characters, it will not work with BibTeX 0.99 or older.
% Instead, you should use an up-to-date BibTeX implementation like “bibtex8” or
% “biber”.
@PHDTHESIS{Weinstock:773555,
author = {Weinstock, Lars Steffen},
othercontributors = {Wiebusch, Christopher and Abel, Dirk},
title = {{E}ntwicklung der elektronischen {S}teuerung für die
autonomen {S}chmelzsonden des akustischen {O}rtungsnetzwerks
im {E}n{E}x-{RANGE}-{P}rojekt},
school = {RWTH Aachen University},
type = {Dissertation},
address = {Aachen},
reportid = {RWTH-2019-11183},
pages = {1 Online-Ressource (vi, 153 Seiten) : Illustrationen,
Diagramme},
year = {2019},
note = {Veröffentlicht auf dem Publikationsserver der RWTH Aachen
University; Dissertation, RWTH Aachen University, 2019},
abstract = {Saturn's moon Enceladus is a very interesting candidate for
the search for extraterrestrial life: Below the moons thick
icy crust lies a global saline ocean, that could support
microbiological life. In order to develop technologies for a
future space mission to Enceladus the German Aerospace
Center started the Enceladus Explorer Initiative. The goal
of the mission is to land on the surface of the moon and to
deploy a maneuverable melting probe, that penetrates the ice
hull. The probe then locates a water-filled crevasse close
to the surface, takes a water sample, and analyses it for
signs of microbiological life. Such a probe, the IceMole,
was developed during the EnEx collaboration und successfully
tested in Antarctica. In the follow-on project EnEx-RANGE
the acoustic positioning system of the IceMole was improved
by replacing the acoustic surface emitters with acoustically
instrumented melting probes. These probes, the APUs, are
able to descend with the IceMole and form a robust reference
system, in which the positions of all APUs and the IceMole
can be determined measuring the acoustic signal travel
times. Additionally this acoustic positioning network
collects information about the ice volume e.g. the position
of obstacles and crevasses. In total 13 APUs were developed,
built, and successfully tested on alpine glaciers during the
EnEx-RANGE project. The electronic control system for the
APUs was developed within the scope of this thesis. This
control system enables an APU to monitor its internal state
(e.g. temperature and pressure), to melt into the ice with a
total power of 2.4 kW, and to emit acoustic signals: The
maximum range of the acoustic signals at the optimum signal
frequency of 10.1 kHz and a signal-to-noise ratio of 10:1 is
38 m. In addition to the development of the electronics of
the control system the mechanical construction of the
acoustic emitter of the APU was analysed and modifications
worked out to further improve the emitters range. To
demonstrate the capabilities of the control system a
measurement of the acoustic signal transfer characteristics
was performed on the final glacier test of EnEx-RANGE.},
cin = {133510 / 130000},
ddc = {530},
cid = {$I:(DE-82)133510_20140620$ / $I:(DE-82)130000_20140620$},
typ = {PUB:(DE-HGF)11},
doi = {10.18154/RWTH-2019-11183},
url = {https://publications.rwth-aachen.de/record/773555},
}
guest ::