MiniShark, a versatile data acquisition unit, dedicated to Geophysical applications (ambient vibration & earthquake recording).
Ambient vibration recorder
(3rd generation CityShark family)
Synchronous multichannel (up to 3) recording for any low voltage signal.
Recording parameters are set up using push buttons. No need to connect to an external computer.
Independent & portable device with a powerful internal battery & a removal SD Card for efficient data storage.
Accuracy high quality system for ambient vibration recordings, to synchronously record one sensor, 3 channels.
May be used with passive or active sensors. Active sensors are powered by MiniShark through the same cable used for recording the signal.
Very low internal noise allowing the use of a 4.5Hz sensor to study frequencies down to 0.2 Hz.
The internal GPS, a high quality clock and continuous recording allow MiniShark to be used for earthquake recording.
Possible external power (through a battery or the charger) for long-term experiments.
Statistical tests, used to evaluate gain variations, offsets, absence of missing code, internal noise level, remote triggering and synchronism between channels proved MiniShark to be a very reliable data acquisition system.
The data software package: Geopsy open source software, and available at geopsy.org for free, makes it possible to format the flash card and retrieve data in ASCII spreadsheet-ready format, in an easy and time-effective way producing very easy to handle data files, or directly in SAC format.
The software runs under the most common systems (MS-Windows, Linux, Mac OSX).
Finally, while mostly used in the framework of ambient vibration studies, MiniShark can handle any kind of low voltage signal.