Streaming

Through the entire history of DEWESoft the performance in storing was one of the most important issues. The PC technology have advanced through the years and we are using all possible resources to get more from the system: multicore technology, RAID systems, dual PCI bus technology and others helped to improve our performance.

Currently we achieve more than 150 MB/second sustained stream rates. Even with such high rates, DEWESoft prepares the data to be reloaded in a matter of seconds.

With a very specific data file structure we can write the channel setup, display setup, all the events, fast analog data and slow asynchronous data from different sources in a single file.

For long term measurement DEWESoft offers to switch the file automatically when certain file size is reached or after specified time (for example 24 hours). The file switches in that way that no data is lost in between.

Triggered storing

Sometimes the system needs to watch the data for several days or weeks, looking only for very specific events. It is not nice to store all the data to the hard drive and then search for that event. Therefore DEWESoft 7 offers very extensive triggering - we can use start and stop triggers and use pre and post time for triggering. The trigger conditions can be:

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  Simple edge (either rising or falling slope)

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  Filtered edge (edge plus rearm level; either slope)

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  Window trigger (two levels; entering or leaving logic)

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  Pulsewidth trigger (longer or shorter than duration logic)

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  Window and Pulsewidth (completely selectable as above)

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  Slope Trigger (rising or falling slope with steepness selection)

We can also use math formula to create combined trigger conditions.

There is also an option to store fast data on triggers, but store reduced data (min, max, average and RMS values) for the time when triggers are not active. This gives an rough idea of how the channels changed when triggering was not active.

Database storage

For applications which requires long term storage and off line post processing, DEWESoft 7 offers a database storage add-on, where the data is packed and sent to remote database server. The slow speed data is stored all the time and in case of events a full speed data is acquired and stored. A special PMT tool is available for post processing and reports.

The database storage is mainly used for distributed power applications, but can be used widely in any other application.