Encontrados 8 documentos, a visualizar página 1 de 1
A Communication and Control System for a Low Energy Particle Accelerator
José Alberto Gouveia Fonseca; Dinis Gomes Magalhães dos SantosIn this thesis the specification and development of a communication and control system is described. The system is intended to be applied primarily to a low energy particle accelerator to be built locally. The electronic circuits and the processing and interface elements needed to accelerator operation are considered as part of the system.This work can be divided into three separate subjects. In the first ...
A SCADA System for the Cattle Industry
João Paulo Ferreira Lopes; José Alberto Gouveia FonsecaThe development and practical application of a SCADA (Supervisory Control and Data Acquisition) system to the cattle industry is presented. Specifications were imposed so that it could be also used in a vast range of industrial processes. (...)keywords: SCADA systems; instrumentation; fieldbusesM.S., 1995more info. http://opac.ua.pt/F/?func=find-b&find_code=SYS&REQUEST=000091455 ; Descreve-se...
Dynamic Scheduling in Industrial Networks
Rosa Maria Charneca Pasadas; José Alberto Gouveia FonsecaCompetition between industries is leading to a significant effort towards production optimisation and quality improvement. A consequence of this is the increase in automation investments. As a high degree of automation is attained and a strong pressure is imposed towards such aspects as fault tolerante and dynamic configuration, industrial automation systems are becoming more and more complex. (...)keywords:&nb...
Programming and Testing Embedded Systems for Instrumentation
Fernanda de Madureira Coutinho; José Alberto Gouveia FonsecaThe development of 8 or 16 bits microprocessor/ microcontroller based systems, used in industrial or instrumentation applications (designated by embedded systems), is normally made by designers more experienced in hardware development. (...)Keywords: microprocessors and microcontrolers; embedded systems; software development; real-time kernelsM.S., 1997more info. http://opac.ua.pt/F/?func=find-b&f...
Modelling and validation of non-deterministic clock synchronisation algorithms
Pedro Nicolau Faria da Fonseca; José Alberto Gouveia Fonseca; Zoubir MammeriThis thesis addresses the problem of anlysing and designing non-deterministic clock synchronisation algorithms in distributed systems. Non-deterministic algorithms are a promising solution to the clock synchronisation problem, which can be testified by the attention they have received in recent years. (...)keywords: clock synchronisation; distributed systems; real-time systems; non-deterministic algorithms...
Flexibility and timeliness in fieldbus-based real time systems
Luís Miguel Pinho de Almeida; José Alberto Gouveia FonsecaDistributed computer control systems (DCCS) are type of real-time systems present in many fundamental sectors of human activity, For example, they are typically found in industrial automation systems, at various levels. (...)Keywords: real-time systems; industrial communications; real-time message scheduling; fieldbusesPh.D., 1999more info. - http://opac.ua.pt/F/?func=find-b&find_code=SYS&REQU...
Wireless Vehicular Communications for Automatic Incident Detection and Recovery
Joaquim José Castro Ferreira; José Alberto Gouveia Fonseca; Lopes, Jorge AlvesIncident detection is the process by which an incident is brought to the attention of traffic operators in order to design and activate a response plan. To minimize the detection time is crucial to mitigate the incident severity for victims as well to reduce the risk of secondary crashes. Automated incident information dissemination and traffic conditions is useful to alert in-route drivers to decide alternativ...
Controller Area Network
Joaquim José Castro Ferreira; José Alberto gouveia fonsecaController Area Network (CAN) is a popular and very well-known bus system, both in academia and in industry. CAN protocol was introduced in the mid eighties by Robert Bosch GmbH [7] and it was internationally standardized in 1993 as ISO 11898-1 [24]. It was initially designed to distributed automotive control systems, as a single digital bus to replace traditional point-to-point cables that were growing in comp...
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