| 摘要 |
According to the method a laser light source (10), which in a beam direction (14) exposes a line (13), and a light detector (9) capable of taking a picture with a certain resolution and having a line of sight (12), are mounted on a vehicle (1) or implement (5) with a travelling direction (P) in such a manner that a line (13) exposed by the laser light source (10) in the field is transverse to the travelling direction (P), that the light detector (9) aims at the line (13) exposed by the laser light source (10), the line of sight (12) of the light detector (8) and the beam direction (14) of the laser light source (10) forming an angle (alpha) in a plane transverse to the exposed line (13). The light detector (9) takes a picture of the exposed line (13) and the picture taken by the light detector (9) of the exposed line (13) in the field is analysed with a view to determining extreme value points (18), bends or the like characteristics in the picture of the line (13).
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