| 摘要 |
<p>A system for detecting an obstruction in the travel of a vent, such as a window glass in an opening of a vehicle, includes a reference element. The reference element is typically coded and either visible or invisible to the naked eye or emits a light signal which extends along at least a part of the perimeter of the opening. A detector, such as a matrix camera, detects the reference element at each point of at least a part of the perimeter of the opening. The system allows detection of an obstruction in the travel of the vent, regardless of variations in light or level of contrast, improving the quality of the detection.</p> |
