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microprocessor-based INTERACTIVE IMAGE-PROCESSING system

IEE PROCEEDINGS-E COMPUTERS AND DIGITAL TECHNIQUES 1980年第5期127卷 197-202页

作者： CADY, FM HODGSON, RM Department of Electrical Engineering University of Canterbury Christchurch New Zealand

The hardware of a microprocessor-based interactive image-processing system is described. This system incorporates a two-dimensional charge-coupled-device imaging array and can digitise 100 × 100 element images at a rate of 6Hz. A visual-display monitor is provided for the immediate display of the digitised picture information, and a floppy disc is included for the permanent storage of data. The software system used for interactive image-processing and applications of the system are briefly described.

关键词： interactive image processing microprocessor based system analogue-digital conversion floppy disc computerised picture processing A/D and D/A convertors Communications computing digitised picture information

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microprocessor CONTROL OF TIG WELDING system

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IEE PROCEEDINGS-E COMPUTERS AND DIGITAL TECHNIQUES 1982年第1期129卷 1-8页

作者： SLOAN, K LUCAS, J Department of Electrical Engineering & Electronics University of Liverpool Liverpool UK

At the start of the project, a hardwired controller existed for controlling the welding sequence required for pulsed TIG welding. Such a sequence controls the gas flow, arc current and torch movement. This controller has now been replaced by a microprocessor-based design. The system is described in this paper and it readily carries out the functions of the hardwired controller but, in addition, is able to store programs of the welding sequence parameters, operate visual displays and permit alteration by keyboard the value of any one of the parameters even while the weld is being created. The design is based upon the Intel 8080 microprocessor and all the necessary interfaces to the welding plant have been developed. The software was developed initially on a prototyping system and then a main frame computer (ICL 1906S). In order to test the developed controller, an experimental TIG welding apparatus has been constructed. The result of successful welding tests are given including photographs of sample welds. The project has clearly illustrated that microprocessors can be used in hostile electrical environments and the results presented are an important step in the development of a fully automated TIG welding system.

关键词： Control engineering computing arc current gas flow Intel 8080 computerised control Joining processes and welding microprocessor based system controller electric welding torch movement Power applications in manufacturing industries keyboard visual displays TIG welding system

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Mechatronics engineering education and dissemination program

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The Visual Computer 1988年第5期4卷 227-242页

作者： Yamazaki, Kazuo Mechatronics CAD/CAM Laboratory Department of Production Systems Engineering Toyohashi University of Technology Toyohashi 440 Tempaku-cho Japan

For evolution of Mechanical system Technology, a simplified mechanism with sophisticated electronics control are replacing the traditional pure mechanical system. The new technology which combines the mechanical system with electronics control is being referred to as "Mechatronics Technology" and explosively growing in all over the industrialized countries. The paper describes, the concept and essential technology components of the mechatronics technology and the methodology and implementation of the "Mechatronics Engineering Education". © 1988 Springer-Verlag.

关键词： Computer aided instruction Computer control Digital servo control Electro-mechanical system Electronics education in mechanical engineering Engineering education Mechatronics education Mechatronics engineering microprocessor based system sequence control Software engineering

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Digital ultrasonic image construction using electronic ordered dither techniques

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Journal of Nondestructive Evaluation 1981年第1期2卷 75-84页

作者： Blake, Robert A. Allebach, Jan P. Center for Composite Materials University of Delaware Newark Delaware United States Department of Electrical Engineering University of Delaware Newark Delaware United States

The use of a digital microprocessor based system for the acquisition of ultrasonic C-scan information is investigated. The C-scan information is displayed on a binary display device using electronic ordered dither techniques to represent gray levels. The digital system with a binary display increases system flexibility and yields better reproducibility and constant image quality independent of the display medium. Images may be stored on magnetic tape or disk for later retrieval and image processing. The techniques which are described allow for image magnification and a reduction in scan time by replacing the mechanical linkage between the scanner and the display with digital signals. A detailed comparison is made between two dither signals, and the advantages of each are discussed. The combination of digital signal processing and imaging techniques produces results which utilize the capabilities of ultrasonic inspection to the point where the transducer becomes the limiting factor. © 1981 Plenum Publishing Corporation.

关键词： binary display digital signal processing image magnification microprocessor based system NDE ordered dither ultrasonic C-scan

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Comparison of Surface Finishes in a Production Engineering Situation by a Low-Cost Non-Contact Method

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IFAC Proceedings Volumes 1979年第8期12卷 1287-1291页

作者： E.W. Reed K.G. Keeping School of Mechanical and Production Engineening Leeds Polytechnic U.K.

Described in this paper is a low-cost investigation to compare surface finishes by studying the reflection behaviour of small radiant heat pulses, these pulses being generated in the form of a pseudo-random binary sequence (p.r.b.s.) The use of p.r.b.s. signals greatly simplifies the correlation equipment necessary, thus making it a practical proposition for low-cost technical applications. The analysis of these signals is in effect a rapid method of obtaining the average result of many individual tests which can be performed in the presence of extraneous influences. The technique described compares surface finishes by making use of the fact that heat will ~eflect in a different way from different surface conditions. A pseudo-random binary sequence (p.r.b.s.) pattern of small heat pulses is directed on to a surface and the subsequent reflection pattern monitored by a temperature sensor. The signal from this sensor is processed (correlated) by simple low-cost electronic circuitry to give a voltage level which varies with the roughness of the surface being considered. The results which have been obtained for different surface conditions of the same material suggest that this method of application may be effective for the monitoring of the surface finish of products during a production cycle although the investigation is still in the experimental stage. A suggested microprocessor based system is described in the conclusion of this paper together with the expected advantages gained by using this development as compared with the analogue system described in the main body of the paper.

关键词： Surface finish low-cost non-contact p.r.b.s. microprocessor based system

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