MULTIPROCESSOR DATA ACQUISITION-SYSTEM

• Tipo: Artigo em Revista Científica Internacional
• Data: 1989

Autores

LOUREIRO, CFM (Autor) Outra; MORGADO, AML (Autor) Outra; CORREIA, CMBA (Autor) Outra

Revista

Título: IEEE Transactions on Nuclear Science

Vol. 36

Páginas: 1475-1479

ISSN: 0018-9499

Editora: IEEE

Indexação

ISI Web of Knowledge - 1 Citação

Scopus - 2 Citações

Outras Informações

ID Authenticus: 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.

Idioma: Inglês

Tipo (Avaliação Docente): Científica

Nº de páginas: 5