DAWN: Data Acquisition With In-Vehicle Networks
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Logger or PC for Data Acquisition?
How About Both?
DAWN
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SNAP MASTER
Rick Walter PC-based data acquisition is the most straightforward method, but a logger is often preferred for its robust, automatic, and unobtrusive platform.

So, which method is right for your project? Let’s compare the two.

Advantages of a PC:

  • Familiar user interface, operating system, and display
  • Real-time display of data for immediate feedback
  • Large storage capacity and easy transfer of files

Disadvantages of a PC:

  • Expensive to have a ruggedized computer to handle temperature extremes and vibration
  • Can require operators to start and stop acquisition
  • May affect driver behavior

A data logger overcomes these disadvantages, but also has its own shortcomings:

The benefits of a logger:

  • No PC required in vehicle
  • No test personnel required on-board
  • Typically less expensive

Disadvantages of a logger:

  • Minimal or no user interface
  • Complicated file transfer
  • Typically, a limit of 4 samples/sec aggregate to transmit real-time data back to the office

It’s obvious there is a need to package the advantages of both into one system, and HEM Data offers the answer: DAWN.

The DAWN data acquisition system starts with hardware that can be connected directly to a PC or used as a logger. It utilizes a consistent user interface and configuration software for both methods. DAWN automatically transmits data files as soon as acquisition is completed, and it offers the option to transmit real-time data acquired at a rate of 400 samples/sec – 100X faster than the market standard.

To learn more about the flexibility of DAWN, click here.

Click here for information on HEM Data’s next SAE seminar, Acquiring and Analyzing Data from Sensors and In-Vehicle Networks (June 8-9, 2009).

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