| 摘要 |
<p>A vibration sensor for monitoring movement of a surface being a high responsivity accelerometer utilising optical fibre, or some other strain sensing method, mounted on a flexural casing (12), connected to a mass (23) within the casing, which is formed into an elliptically tapered concave cylinder, with a mass (23) depending from one end of it. The movement monitoring area is located by the other end of the device from the mass end. The invention can use optical fibre coils (11) wound around the structure at the mid point of the cylinder in a plane normal to the axis of the cylinder. The device can be used to detect seismic applications.</p> |
