| 摘要 |
<p>A bending magnitude detecting device which can preciselydetect the bending magnitude of a shaft and which does not obstruct the high speed rotation of the shaft. A first coil 1 is disposed facing the outer surface of a shaft, and a second coil 2 is disposed in such a way that it faces the first coil 1 through the shaft. These two coils 1, 2 are connected to each other in series. In order to provide a difference between the inductances of these two coils 1, 2, for example the number of winds of the first coil is made greater than the number of winds of the second coil 2. By means of this kind of construction, the characteristic of an output signal S0 obtained from the series connection point A of the two coils 1, 2 is offset, and, as a result, even when the bending magnitude of the shaft is in the extremely small range [a], the characteristic of the output signal S0 has a constant linearity. <IMAGE></p> |
