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Radio and Electronic Engineer

Issue 2 • Date August 1969

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Displaying Results 1 - 8 of 8
  • Ultrasonics in industry

    Publication Year: 1969
    IEEE is not the copyright holder of this material | Click to expandAbstract | PDF file iconPDF (142 KB)

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  • The control system of the national grid and its communication links

    Publication Year: 1969, Page(s):59 - 72
    IEEE is not the copyright holder of this material | Click to expandAbstract | PDF file iconPDF (2274 KB)

    The C.E.G.B. generates power to meet the instantaneous demands of the eleven Electricity Boards in England and Wales (maximum 35 800 MW in January 1968). With 230 generating stations and grid transmission at 400, 275 and 132 kV and with 700 grid switching and/or high voltage transforming stations, the C.E.G.B.'s integrated power system is the largest in the world under unified control. To control ... View full abstract»

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  • The recurrent-continuant method of transfer function synthesis

    Publication Year: 1969, Page(s):73 - 81
    Cited by:  Papers (1)
    IEEE is not the copyright holder of this material | Click to expandAbstract | PDF file iconPDF (1018 KB)

    It is shown that the ratio of input voltage to output voltage for any passive ladder type low-pass filter network is always a polynomial in the complex frequency s. This polynomial can always be written by inspection as a single determinant in the form of a recurrent. The recurrent determinant is then converted by elementary manipulation into an alternate form known as a continuant. The transfer f... View full abstract»

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  • Pseudo-random selection of elements in a multi-element array

    Publication Year: 1969, Page(s):82 - 88
    IEEE is not the copyright holder of this material | Click to expandAbstract | PDF file iconPDF (875 KB)

    Simple random number generators using integrated circuit shift registers are being employed to make random selections of points on multi-element (12 000 array points) ultrasonic planar transducers. The transducer is a 2-in (5 1 cm) diameter piezoelectric plate used to detect the scattered acoustic field caused by an object placed in an ultrasonic field. The transducer is digitally scanned to enabl... View full abstract»

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  • Frequency modulating transducers

    Publication Year: 1969, Page(s):89 - 95
    Cited by:  Papers (1)
    IEEE is not the copyright holder of this material | Click to expandAbstract | PDF file iconPDF (1522 KB)

    Frequency modulating (f.m.) transducers are instruments whose output frequency is proportional to the measured physical parameter, such as flow (turbine flow meter), radiation (Geiger counter), pressure, density etc. The paper deals with the advantages of using f.m. in process plants and describes some f.m. instruments which measure flow, pressure, temperature and density. View full abstract»

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  • Discussion on ¿Frequency modulating transducers¿

    Publication Year: 1969, Page(s):95 - 97
    IEEE is not the copyright holder of this material | PDF file iconPDF (544 KB)
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  • Some aspects of tropospheric radio-refractivity over India

    Publication Year: 1969
    IEEE is not the copyright holder of this material | Click to expandAbstract | PDF file iconPDF (1166 KB)

    Some features of radio-refractivity which are important from engineering point of view are described with reference to published data on radio-refractivity up to a height of 3 km from the surface of the Earth and radiosonde data on pressure, temperature and humidity up to 4.5 km covering a period of five years. Three broad radio-climatic areas having distinct meteorological and refractivity charac... View full abstract»

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  • Weighing vehicles in motion

    Publication Year: 1969, Page(s):109 - 119
    IEEE is not the copyright holder of this material | Click to expandAbstract | PDF file iconPDF (1067 KB)

    Weighing objects in motion poses problems which are quite distinct from those encountered in static weighing. Until recently no serious attempt had been made to tackle these problems. The paper discusses the weighing errors caused by the motion of the object being weighed. Methods of reducing these errors are described and an assessment is made of the effectiveness of these methods. A novel approa... View full abstract»

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