高温溶融金属の粘度測定に関する研究 : 回転振動角の非接触計測法

概要

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The microcyn is the most suitable instrument for sensing small oscillating angles of inner cylinder in the coaxial double-cylinder type viscometer, which can be applied to measure the viscosity of molten metal. Here the formula of the relationship between rotational angle of rotor and output voltage of microcyn is introduced. For high precision and reducing the effect of manufacturing process the microcyn is fabricated by chemical blanking. And the several characteristic behaviors ascertained by the experiments are summarised as follows : (1) for the input voltage from 1 to 5 [V] and the carrier frequency from l to 10 [kHz], the linearlity is maintained up to about 20 [deg] from a reference position, (2) the sensitivity of output voltage within linear range is 10.7 [mV/deg] for rotor laminated with layered by 9 plates of permalloy and 19.9 [mV/deg] for that with 23 plates of the same alloy, (3) the allowance for linearlity is about 0.5%, (4) the output voltage shows a constant value within the rotating speed range from 0 to 612 [rpm], and (5) the output voltage shows a constant value within the temperature range from 20 to 60 [℃]. Futhermore, the compensating circuit for linear output is developed to get the lineality up to 45 [deg] from a reference position. And the microcyn output port is connected with a personal computer.
東海大学の論文