Method and device for measuring the torque transmitted by a shaft subjected to temperature variations

摘要

According to this method the linear expansion ( DELTA L) of a reference shaft is measured with reference to that of the power shaft. The linear expansion of the reference shaft (R3) is converted into a movement of rotation of an annular phonic wheel (B3) by means of the free end (J) of this shaft engaged in a helical groove in the inner surface of the annular wheel (B3).