Journal of the Horological Institute of Japan
Online ISSN : 2432-1915
Print ISSN : 0029-0416
ISSN-L : 0029-0416
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Volume 128
Displaying 1-5 of 5 articles from this issue
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  • [title in Japanese]
    Article type: Cover
    1989 Volume 128 Pages Cover1-
    Published: March 20, 1989
    Released on J-STAGE: November 09, 2017
    DOIhttps://doi.org/10.20805/tokeieafj.128.0_Cover1
    JOURNAL FREE ACCESS
    Download PDF (41K)
  • [title in Japanese]
    Article type: Cover
    1989 Volume 128 Pages Cover2-
    Published: March 20, 1989
    Released on J-STAGE: November 09, 2017
    DOIhttps://doi.org/10.20805/tokeieafj.128.0_Cover2
    JOURNAL FREE ACCESS
    Download PDF (41K)
  • Simulation on Motion of Stepping Motor for Time-Piece : 2nd Report
    Tomio KOTAKI
    Article type: Article
    1989 Volume 128 Pages 1-16
    Published: March 20, 1989
    Released on J-STAGE: November 09, 2017
    DOIhttps://doi.org/10.20805/tokeieafj.128.0_1
    JOURNAL FREE ACCESS
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    With regard to the motion of the micro stepping motor for watch, the stator parameters which represent the stator characteristics are introduced in this paper. These parameters on a sample motor are determined by the computer simulation referred to various experimental results on the motor. Stepping behavior of the motor with the sample stator for various cases of pulse height e, pulse width τ, number of coil winding n, and radius of rotor magnet ρ are easily obtained by the simulation by use of the above-mentioned stator parameters. They are shown in maps of e - τ, n - τ, and ρ - τ, in which the domains of normal and abnormal stepping motion and the graph of average current consumed in the motor are described. These maps are available for determination of optimum values of τ, n, and ρ from the points of view of the stability of stepping motion and the low consumption energy in case of motor design. As examples, the cases of e = 1.5 v and 3.0 v are treated in this paper.
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  • Development of System with a Built-In Shock Sensor and Application to a Watch
    Tomomi MURAKAMI, Satoshi TAHARA, Masao SAKUYAMA, Takashi KANEKO
    Article type: Article
    1989 Volume 128 Pages 17-26
    Published: March 20, 1989
    Released on J-STAGE: November 09, 2017
    DOIhttps://doi.org/10.20805/tokeieafj.128.0_17
    JOURNAL FREE ACCESS
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    We have developed a watch with a shock-sensor for sports-men. This shock sensor is a piezo-electric element which is set up on a back cover of the watch. In this report, the systems are described which eliminate noise from the watch on wearing and operate correctly when the watch is tapped. Since it uses the shock sensor for the start-stop operation of the stopwatch time measuring system, this watch is useful for the sportsman who will measure his training time by himself.
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  • [title in Japanese]
    [in Japanese], [in Japanese], [in Japanese], [in Japanese], [in Japane ...
    Article type: Article
    1989 Volume 128 Pages 27-62
    Published: March 20, 1989
    Released on J-STAGE: November 09, 2017
    DOIhttps://doi.org/10.20805/tokeieafj.128.0_27
    JOURNAL FREE ACCESS
    Download PDF (2423K)
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