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Computing & Control Engineering Journal

Issue 4 • Date Aug. 2001

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Displaying Results 1 - 5 of 5
  • 3D imaging and ranging by time-correlated single photon counting

    Publication Year: 2001 , Page(s): 157 - 168
    Cited by:  Papers (1)
    Save to Project icon | Click to expandQuick Abstract | PDF file iconPDF (1775 KB)  

    3D imaging is an important tool for metrology and reverse engineering of components and structures in a wide variety of contexts, from automobile and aeroplane manufacture to creative media and architectural surveying. The authors review briefly the principal methods in current use for 3D imaging, then present a new method for time of flight depth measurement, which is more accurate and sensitive than current techniques. To illustrate its potential, we show a number of examples of 3D data acquired from both small and large objects, taking examples from cars, planes and archaeological artefacts. View full abstract»

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  • The road to plant validation

    Publication Year: 2001 , Page(s): 169 - 178
    Save to Project icon | Click to expandQuick Abstract | PDF file iconPDF (2183 KB)  

    Effective production requires serviceable unit processes, under stable control with credible sensed data and precise actuation. Validation of these components is not just an aid to safe operation, but can also enhance the availability of the plant. Cost-effective validation uses standard metrics for the intercommunication of results via a network and starts at the sensor and actuator level. In particular, greater availability comes from limp-home features that provide a degree of operability even in the presence of faults. This can be achieved at the device level, by adjusting a loop's PID regulator, by using auxiliary variables and data fusion, or by the reconfiguration of a model predictive controller (MPC). Examples are given of self-validating (SEVA) field instruments and the effect of adjusting a control loop using SEVA data. Plant validation is a combination of SEVA devices and of change detection based on the residuals derived from an MPC model. View full abstract»

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  • Distributed real-time control and data acquisition of free-electron laser beams

    Publication Year: 2001 , Page(s): 179 - 187
    Save to Project icon | Click to expandQuick Abstract | PDF file iconPDF (1717 KB)  

    Implementation of a feedback control scheme and its associated user interface and data acquisition modules in a distributed real time computing environment are described. The distributed system consists of an ethernet network interconnecting real time processor modules to host workstations and other embedded controllers. The goal of the feedback control scheme is to maintain positions of the electron beam in the middle of the vacuum chamber in the presence of electromagnetic interference and noise. Technical details of implementing the data acquisition and control scheme and their integration with the existing control system modules are presented, along with experimental results. View full abstract»

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  • Interpretation of colour maps. A combination of automatic and interactive techniques

    Publication Year: 2001 , Page(s): 188 - 196
    Cited by:  Papers (1)
    Save to Project icon | Click to expandQuick Abstract | PDF file iconPDF (1215 KB)  

    The article describes a system and technology for the automatic/interactive interpretation of colour maps. Due to the fact that a completely automatic solution is impossible, a combination of automatic and interactive techniques is used. Firstly, colour recognition and separation are performed. For automatic map vectorisation, a special fast scheme is used. To make digitisation more automatic and user friendly, an interactive digitising mode has been developed to extract line-based cartographic objects from vectorised data. The system is used successfully in the digitisation of topographic and other types of map. View full abstract»

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  • Application of multimedia in the industrial sector

    Publication Year: 2001 , Page(s): 197 - 200
    Save to Project icon | Click to expandQuick Abstract | PDF file iconPDF (492 KB)  

    The areas in which the industrial sector in general, and manufacturers of equipment and machinery in particular, can utilise the advantages and features of multimedia are highlighted. The range of multimedia applications that emerge for an engineering or industrial product manufacturer, where the selling process involves an across the table explanation of intricate aspects of product design and advantages that a superior technology provides to the user, are: training of marketing executives; demonstration of functionalities of inner parts of industrial plants and machinery; erection of machinery and onsite troubleshooting; classroom training of maintenance staff; Web enabled parts catalogue and order processing; product catalogues; and simulation. The possibilities of application of multimedia are innumerable and limited only by one's imagination. View full abstract»

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Aims & Scope

Published from 2003-2007, Computing and Control Engineering was concerned with computing, communications, control and instrumentation.

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