| 摘要 |
<p>A camera unit for surveying a railway track (1,2) is described, which comprises a housing (3), a camera positioned therein and lighting means for lighting the railway. The camera is a matrix camera and the lighting means comprise light emitting diodes. Preferably a number of cameras, for example nine, are provided in said housing (3) which are positioned along a line extending substantially transversally to the railway track to be surveyed.</p> |
