| 摘要 |
<p>A tri-axis accelerometer for use in seismic surveying is provided. The accelerometer comprises at least three fibre optic accelerometer elements (A 1-3 ) which have respective fibre sensor coils (F 1-3 ), and which are characteristic in that the fibre sensor coils (A 1-3 ) are coiled about a common coiling axis (C) and at least one of the accelerometer elements is a slant angle accelerometer element. A corresponding method of manufacturing a tri-axis fibre optic accelerometer (A 1-3 ), is also disclosed. A fibre optic tri-axis accelerometer (A 1-3 ) for sensing acceleration in three directions is also provided which comprises a first, a second and a third sensor base (8,9), each base including a first, a second and a third fixed element (9), respectively, and a first, a second and a third movable element (8), respectively, each pair of fixed and movable elements (8,9) carrying a fibre sensing coil (F n ); The fibre sensing coils (F n ) are all coiled around a common coiling axis (C) and at least one of the movable elements (9) is designed and mounted so as to be movable in a direction that is slanted with respect to the common coiling axis (C).</p> |
