MULTIPROCESSOR DATA ACQUISITION-SYSTEM

• Type: Article in International Scientific Journal
• Date: 1989

Authors

LOUREIRO, CFM (Author) Other; MORGADO, AML (Author) Other; CORREIA, CMBA (Author) Other

Journal

Title: IEEE Transactions on Nuclear Science

Vol. 36

Pages: 1475-1479

ISSN: 0018-9499

Publisher: IEEE

Indexing

ISI Web of Knowledge - 1 Citation

Scopus - 2 Citations

Other information

Authenticus ID: P-001-SDA

DOI: 10.1109/23.41086

Abstract (EN): A VME-based multiprocessor system primarily designed as the data acquisition system for a position-sensitive, driftless, gas proportional scintillation counter for X-ray astronomy is described. The counter is build around a nine-photocathode photomultiplier tube. The system was specified so that an external signal triggers the acquisition of nine analog data channels at a 20-MHz rate, with all channels operating in parallel and synchronized. For each data frame a preprocessing algorithm runs in each processor and is followed by a validation routine in the tenth processor. According to the validation decision data may be discarded or collected by the host VME computer. For this purpose a special parallel architecture was developed in which a digital signal processor is dedicated to each data channel, taking care of the acquisition, the preprocessing, and the validation algorithms. Physically the system consists of a set of VME boards each containing two TMS320C26 DSPs and two 20-MHz data acquisition channels.

Language: English

Type (Professor's evaluation): Scientific

No. of pages: 5