Use of Hall Effect for Transducer

概要

論文の詳細を見る
When a current flows through a piece of germanium crystal placed in a magnetic field, Hall electromotive force is developed at right angles both to the magnetic field and to the current. The magnitude of the electromotive force is proportional to sinθ, in which θ is an angle between the current and the magnetic field. We can make a mechanic-to-electric transducer applying the above principle. We can also make a similar transducer, changing the angle between the magnetic field and the direction of Hall leads. We adopted the arrangement by the latter method because we can make the narrowest magnetic pole gap or the strongest magnetic field. By combining the above arrangement and a pneumatic pressure transmitter, We made a pressure to-voltage transducer. It converts a pneumatic pressure (0-1.0kg/cm2) to voltage (0-10mV). Some characteristics of this transducer are as follows: Hysteresis: less than 0.5per cent of full span. (mainly caused by mechanical parts of the transducer.) Nonlinearity: less than 0.4per cent of full span. Ambient temperature effect: almost independent if below 40°C.
公益社団法人計測自動制御学会の論文