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Volume 135
Issue 2
IEE Proceedings A (Physical Science, Measurement and Instrumentation, Management and Education, Reviews)
Volume 135, Issue 2, February 1988
Volumes & issues:
Volume 135, Issue 2
February 1988
Analysis of a perpendicular-type eddy-current speed meter
- Author(s): N. Takehira and A. Tanaka
- Source: IEE Proceedings A (Physical Science, Measurement and Instrumentation, Management and Education, Reviews), Volume 135, Issue 2, p. 89 –94
- DOI: 10.1049/ip-a-1.1988.0014
- Type: Article
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The method of the noncontacting speed measurement of a moving conductive slab is to use the eddy current effect. The slab speed can be measured by the variation of the electromotive force of a detecting coil which is arranged in the neighbourhood of an exciting coil. In the paper, we propose an eddy-current speed meter which consists of one exciting coil and one detecting coil, perpendicular to each other. We carried out a theoretical analysis of this speed meter and confirmed validity of the theoretical formula by experiment. We also obtained some theoretical predictions by the calculation examples. Since this type of speed meter is of a simple structure, and capable of being miniaturised, it is very useful for the continuous manufacturing process, etc.
Co-ordinate determination and performance analysis for robot manipulators and guided vehicles
- Author(s): M. Dickinson and A.S. Morris
- Source: IEE Proceedings A (Physical Science, Measurement and Instrumentation, Management and Education, Reviews), Volume 135, Issue 2, p. 95 –98
- DOI: 10.1049/ip-a-1.1988.0015
- Type: Article
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The paper describes a technique to determine and to track the three-dimensional ‘world’ co-ordinates of a point in space, relative to some defined datum. The work was initiated in order to track the location of a robot manipulator end effector, but has relevance to automatic guided vehicles and other applications. A prototype system has been built and evaluated, and has been used successfully to track the tip of a robot manipulator arm moving at velocities of up to 2 m/s within a working envelope consisting of a cube of side 2 m. Measurement resolution of 0.5 mm was obtained, and a sampling rate of 300 Hz was achieved, by the use of real-time software within the measurement system. The coordinates and the velocity outputs are computed in only 1.2 ms. As far as robot manipulators are concerned, the technique provides accurate tracking of end-effector position, which can be used both for evaluating the dynamic performance of existing controllers and for the synthesis of new forms of control
Impulse flashover along the outer surface of a cylindrical dielectric solid with a gas layer inside
- Author(s): M. Ohki and S. Saito
- Source: IEE Proceedings A (Physical Science, Measurement and Instrumentation, Management and Education, Reviews), Volume 135, Issue 2, p. 99 –106
- DOI: 10.1049/ip-a-1.1988.0016
- Type: Article
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Impulse flashover voltage along the outer surface of a layered dielectric composition, composed of two coaxial hard glass cylinders and an inner gas layer, is known to have a V-shaped curve as a function of pressures inside the gas layer. It is the purpose of the paper to clarify the reason for this V-shaped curve. Variation of electric field intensity along the outer surface caused mainly by ionisation in the gas layer, and partly by the residual charges on the inner surface of the outer cylinder is found to play an important role in determining the flashover voltage
Simple real-time signal processing laboratory experiment
- Author(s): S.A. Todd and A.T. Sapeluk
- Source: IEE Proceedings A (Physical Science, Measurement and Instrumentation, Management and Education, Reviews), Volume 135, Issue 2, p. 107 –109
- DOI: 10.1049/ip-a-1.1988.0017
- Type: Article
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This paper details an approach taken by the authors to provide undergraduate students with experience of some of the problems and techniques encountered in real-time signal processing. The aspects dealt with are development tools for a modern signal processing device the TMS 32010, practical algorithm implementation, and utilisation of processed data
Successful management simulation for young engineers
- Author(s): N.J. Burton and P.M. Weitzel
- Source: IEE Proceedings A (Physical Science, Measurement and Instrumentation, Management and Education, Reviews), Volume 135, Issue 2, p. 110 –112
- DOI: 10.1049/ip-a-1.1988.0018
- Type: Article
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The need for engineers to appreciate and practice management techniques at all stages in their careers, is becoming more apparent and more widely accepted, both within the IEE and elsewhere. The paper describes the progress made in organising large management simulations as an integral part of the IEE Younger Members Weekend Conference, an annual event designed and run by younger members of the Institution
Workshop teaching: an experiment in engineering education
- Author(s): R.G. Kelly
- Source: IEE Proceedings A (Physical Science, Measurement and Instrumentation, Management and Education, Reviews), Volume 135, Issue 2, p. 113 –122
- DOI: 10.1049/ip-a-1.1988.0019
- Type: Article
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Conventional lectures have been replaced by a scheme of structured peer group discussions in teaching part of an honours degree course in electrical engineering. Some of the benefits of small group tutorials can be achieved without the associated heavy demands on staff time. Active involvement in the learning process encourages the student to take greater responsibility for his own learning and helps to develop communication skills. Student response to the scheme has been evaluated by detailed questionnaires to allow comparison with a conventionally taught course. The experiment has been well received by the students and has had no adverse effects on their examination performances. The method is particularly appropriate for teaching groups that are mixed with regard to prior knowledge of the subject
Entropy: Murphy was right
- Author(s): G. Weissmann
- Source: IEE Proceedings A (Physical Science, Measurement and Instrumentation, Management and Education, Reviews), Volume 135, Issue 2, p. 123 –124
- DOI: 10.1049/ip-a-1.1988.0020
- Type: Article
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Joule's concept of entropy, linked with the concept of the inter-relatoin of energy and the production and refining of material, leads to the recognition that generation of waste can be equated to increase in entropy. Thus, we are operating in a limited entropy field available on earth, and this insight has profound significance for economic and environmental systems. Boltzmann indicated that an increase in entropy is synonymous with moving to a state of higher probability, so the greater the wastedness, the more likely this state. This has been enshrined in the pragmatic Murphy's law: ‘if anything can go wrong it will’
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