Journal of The Society of Instrument and Control Engineers
Online ISSN : 1883-8170
Print ISSN : 0453-4662
ISSN-L : 0453-4662
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Volume 2, Issue 1
Displaying 1-9 of 9 articles from this issue
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  • [title in Japanese]
    V. A. Trapeznikov
    1963 Volume 2 Issue 1 Pages 1-8
    Published: January 10, 1963
    Released on J-STAGE: October 21, 2010
    DOIhttps://doi.org/10.11499/sicejl1962.2.1
    JOURNAL FREE ACCESS
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  • [title in Japanese]
    [in Japanese]
    1963 Volume 2 Issue 1 Pages 9-18
    Published: January 10, 1963
    Released on J-STAGE: October 21, 2010
    DOIhttps://doi.org/10.11499/sicejl1962.2.9
    JOURNAL FREE ACCESS
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  • Square Root Converter Using Thermal Converter
    Isamu OHNO, Akira SUMI
    1963 Volume 2 Issue 1 Pages 19-26
    Published: January 10, 1963
    Released on J-STAGE: October 21, 2010
    DOIhttps://doi.org/10.11499/sicejl1962.2.19
    JOURNAL FREE ACCESS
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    The square root converter extracts the output signal which is proportional to the square root of the input signal. It primarily is designed for operation with orifice type flow measuring system.
    It consists of a high gain amplifier and a thermal converter which is placed in the feedback circuit of the amplifier. The output e. m. f. given by the thermal converter is proportional to the square of the heater current. Actually, however, a conventional thermal converter does not completely obey this simple square-law relationship, and consequently errors may result when it is used in a square root converter.
    The authors have developed thermal converters, which have excellent square-law performance, investigating the materials and dimensions of their heater and thermocouple, and set up a square root converter, which has 0.2% accuracy and fast dynamic response, using the thermal converter. This paper describes both theoretical and experimental works on the thermal converter and square root converter, especially, analysis of static error due to a finite gain of feedback loop and stabilizing method using a non-linear amplifier.
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  • 2 Phase Reversible Step Motor
    Tatsuo GOTO
    1963 Volume 2 Issue 1 Pages 27-32
    Published: January 10, 1963
    Released on J-STAGE: October 21, 2010
    DOIhttps://doi.org/10.11499/sicejl1962.2.27
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    Described in this paper are the theoretical and experimental analysis of the dynamic characteristics, of newly developed 2 phase reversible step motor.
    This 2 phase step motor has many excellent features as follows:
    1) Smaller size.
    2) Simpler driving circuits than those of.conventional 3 phase step motor.
    3) Free from “hunting” which is the most troublesome problem of this kind of motor.
    Here is given an operation principle at first and then the inditial response of this motor is obtained by introducing an optimum switching time T1 from a standpoint of stable operation.
    Finally, the experimental results related to the effect of friction load and inertia load are presented.
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  • Measurement of Frequency Response Based on Correlation Principle
    Yoichi KAYA
    1963 Volume 2 Issue 1 Pages 33-40
    Published: January 10, 1963
    Released on J-STAGE: October 21, 2010
    DOIhttps://doi.org/10.11499/sicejl1962.2.33
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    A method for measuring the frequency response of a plant with an arbitrary input has been developed (1). In this paper it is verified that this method is based on the correlation principle or the frequency response Gp (jω0) is measured as the ratio of complex variables of input-output cross-power spectrum φmc (jω0) to input power spectrum φmc (jω0).
    Three types of circuits for the measurement are discussed with experimental results. “Servo type” circuit is simplest and has comparatively good characteristics. This type of circuit consists of one multiplier, one integrator, two resonance circuits, etc. “Analytical type” has the best characteristics but is in the most complicated structure. “Optimizing type” is most suitable for the measurement of a plant with a broad frequency band.
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  • Speed Measurement by Using Correlation Technique (1)
    Hiroshi KASHIWAGI, Kenji KATAOKA
    1963 Volume 2 Issue 1 Pages 41-48
    Published: January 10, 1963
    Released on J-STAGE: May 24, 2011
    DOIhttps://doi.org/10.11499/sicejl1962.2.41
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    A non-contact method of speed measurement has been recently developed by the British Iron and Steel Research Association. The principle of the method is to observe the natural irregularities of a moving material, whose speed is to be measured, at two points fixed along the direction of movement and to take the correlation of the observed irregularities as means of measuring the time taken by a point on the material for travelling through the interval between the two points.
    The advantages of the method are as follows: 1) The method is of non-contact type. 2) The material need not have any marking so that it is not required to have specific electric or magnetic properties. The method is applied to the measurement of a paper tape speed by simply calculating the polarity correlation. The light transmitted through the paper tape is modulated by the irregularity in thickne, itid each transmitted light is detected by a phototransistor. Thus obtained signals are quantized into binary ones, corresponding to the signs relative to mean value. Multiplication is made by a transistor logic circuit.
    This method of speed measurement may have a wide range of application. High accuracy can be expected, particularly in case of relative measurement.
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  • [title in Japanese]
    [in Japanese]
    1963 Volume 2 Issue 1 Pages 49-50
    Published: January 10, 1963
    Released on J-STAGE: October 21, 2010
    DOIhttps://doi.org/10.11499/sicejl1962.2.49
    JOURNAL FREE ACCESS
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  • [title in Japanese]
    [in Japanese]
    1963 Volume 2 Issue 1 Pages 52-55
    Published: January 10, 1963
    Released on J-STAGE: October 21, 2010
    DOIhttps://doi.org/10.11499/sicejl1962.2.52
    JOURNAL FREE ACCESS
    Download PDF (630K)
  • [title in Japanese]
    [in Japanese]
    1963 Volume 2 Issue 1 Pages 56-63
    Published: January 10, 1963
    Released on J-STAGE: October 21, 2010
    DOIhttps://doi.org/10.11499/sicejl1962.2.56
    JOURNAL FREE ACCESS
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