| 摘要 |
<p>PROBLEM TO BE SOLVED: To reduce manufacturing cost without causing a trouble, e.g. significant deterioration of performance. SOLUTION: Rotary shafts, i.e., input and output shafts 1, 2, arranged coaxially and rotatably are coupled through a torsion bar 3. The input and output shafts 1, 2 are made of a general structural steel, e.g. S25C or S35C, which is a conductive magnetic body and coated with a thin film of Ni-P alloy by electroless nickel plating. A torque acting on the input and output shafts 1, 2 is detected as a variation of electromotive force being induced in coils 10, 11 through relative rotation involving torsion of the torsion bar 3.</p> |
