International Telemetering Conference Proceedings / October 26-29, 1992 / Town and Country Hotel and Convention Center, San Diego, California / For research purposes on helicopter rotor acoustics a large data acquisition system called
TEDAS (Transputer based Expandable Data Acquisition System) has been developed. The
key features of this system are: unlimited expandability and sum data rate, local storage of
data during operation, very simple analog anti aliasing filtering due to extensive digital
filtering, and integrated computational power which scales with the number of channels.
The sample rate is up to 50 kHz/channel, the resolution is 16 bit, 360 channels are realized
now.
TEDAS consists of blocks with 8 A/D converters which are controlled by one transputer
T800. The size of the local memory is 4 Mbyte. Any number of blocks (IDAM =
Intelligent Data Acquisition Module) can be combined to a complete system. Data
preprocessing is done in parallel inside the IDAMs. As for 16 bit systems the analog
antialiasing filtering becomes a dominant factor of the costs, delta sigma ADCs with
oversampling and internal digital filtering are used. This produces an exact linear phase
and a stop band rejection of -90 dB.
| Identifer | oai:union.ndltd.org:arizona.edu/oai:arizona.openrepository.com:10150/608884 |
| Date | 10 1900 |
| Creators | Gelhaar, B., Alvermann, K., Dzaak, F. |
| Contributors | Institute For Flight Mechanics |
| Publisher | International Foundation for Telemetering |
| Source Sets | University of Arizona |
| Language | en_US |
| Detected Language | English |
| Type | text, Proceedings |
| Rights | Copyright © International Foundation for Telemetering |
| Relation | http://www.telemetry.org/ |
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