| 摘要 |
A vibration monitoring device having a reference axis and is provided with two accelerometers fixed to a common support. Each accelerometer comprises: an inertia mass movable parallel to the reference axis between an intermediate rest position and two opposite limits, an internal test circuit for moving the inertia mass from a rest position towards a first of the two opposite limits in one testable direction in the absence of vibration of the common support, and sensing means for delivering an acceleration signal corresponding to the motion of the inertia mass parallel to the reference axis, the acceleration signal containing a first signal portion corresponding to the motion of the inertia mass between the intermediate rest position and the first of the two opposite limits, and a second signal portion corresponding to the motion of the inertia mass between the intermediate rest position and the other of the two opposite limits. Remarkably, the testable directions of the two accelerometers are opposite to one another. |
