Interfaces
11
© 2017 Nortek AS
4.2
DVL Diagnostics - MIDAS
The most straight forward means of visualizing a DVL data stream is to open the Data Display tab
within the DVL's web browser interface. This is simplified presentation of a running time series of the
data output from the DVL. It includes Pressure, Velocity (beam), Figure Of Merit (beam), Distance,
Velocity (XYZ), and Figure Of Merit (XYZ). Note that invalid data is not displayed and such data is
very common when attempting to operate in a bucket or tank with poor acoustic conditions. Refer to
the section on
Functionality tests
for general DVL checks.
For a more complete data visualization, the MIDAS software (Multi-Instrument Data Acquisition
System) is useful if you are interested in looking at data online for short periods of time. The
installation file can be downloaded directly via the Applications web page (see previous section). The
software requires a Java Virtual Machine (JVM) to be installed. The software has been tested with
the Sun JVM available form
http://www.java.com
but it is also known to be fully functional with other
JVMs. Note that MIDAS has a software manual available for download (Click
Help > SW Manual
).
The Nortek DVL, together with the MIDAS software, offers a Spectrum Analyzer function. This is
particularly useful when trying to identify sources of acoustic or electronic noise onboard a vehicle.
Consult the MIDAS help to learn more about this feature.
System requirements:
1 GHz x86 based host machine (dual-core recommended for imaging)
Windows NT, Vista or Windows 7 (32- or 64-bit) with Java Virtual Machine installed (the software will
operate with both 32- and 64-bit JVMs. Using a 64-bit JVM greatly increases the size of the
MATLAB data files that can be exported by the software.
1 GB of RAM (2 GB or higher is recommended)
USB port
Minimum display resolution of 1024x768, 256 color
After a successful installation, continue with the following steps if you connect through the network.
If you are using Serial port communication, jump directly to the next paragraph.
