| 摘要 |
PROBLEM TO BE SOLVED: To provide a displacement-detecting apparatus having improved sensitivity to displacement of an object to be measured.SOLUTION: A displacement-detecting apparatus 1 comprises: a pair of magnets 4 arranged across a gap, and forming a magnetic field in the gap; a displaceable soft magnetic body 3 arranged between the pair of magnets 4, and connected to an object to be measured 5; a sensor 2 arranged between the pair of magnets 4, and having a pair of Hall elements 20a and 20b for detecting changes of the magnetic field associated with displacement of the soft magnetic body 3 in a detection direction Dsz intersecting the displacement direction Dd of the soft magnetic body 3; and a differential amplifier circuit 21 for outputting the difference of the outputs of the Hall elements 20a and 20b of the sensor 2.SELECTED DRAWING: Figure 1 |
