Magnetostrictive torque sensor.

摘要

A torque sensor comprises a magnetic amorphous film (30) whose magnetostrictive characteristics vary with the amount of torque applied thereto and coils (96) for detecting magnetostrictive variation disposed opposite the magnetic film and is detachably coupled with a shaft whose torque is to be measured. The shaft is cut into two halves (10,36) and the unit has flange couplings (26,46) connected to the one half (36) of the shaft while receiving the other shaft half (10) at its boss (20). The boss is elongated to form a tubular portion (25) on which said magnetic film(30) is affixed and an enclosure member (60,64) houses the tubular portion.The coils are attached on the inner wall of the enclosure member to keep a distance from the film affixed on the tubular portion.