| Budget Amount *help |
¥1,400,000 (Direct Cost: ¥1,400,000)
Fiscal Year 1988: ¥500,000 (Direct Cost: ¥500,000)
Fiscal Year 1987: ¥900,000 (Direct Cost: ¥900,000)
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| Research Abstract |
This research develops preliminary studies on the measurement of dynamic torque in a rotating shaft by utilizing the magnetic lattice. The intensity of torque is proportional to the angular twist of the shaft. In this research, the relative angular displacement between two positions on the torsion bar can be detected from the phase difference between two magnetic sinusoidal signals, which are recorded on magnetic tapes wound around those two positions. Then, the torque of the shaft can be calculated from the phase difference. This method using the magnetic lattice may be possible to measure the torque in the wide range and with high accuracy by choosing arbitrarily the wavelength of the sinusoidal signals, comparing with the usual torsion bar torquemeter.
(1) Both the principle of the measurement and the signal processing circuit were explained.
(2) The guidline for the design of a measuring device was shown, taking into account the material, diameter and rotating speed of the shaft, and the measuring range.
(3E experimental considerations were developed associated with the appratus made on trial, which was equipped with the rotating shaft of a bench lathe. On two positions of its shaft, the magnetic tapes were wound on which sinusoidal signals were recorded with the wavelength 157 m. Corresponding to each magnetic tapes, magnetic heads were set. Through these heads, the signals with respect to phase differences were detected and the true values of the dynamic torque were obtained through data processing of digital computer, in which the torque values were estimated by the application of Kalman filter theory.
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