| 摘要 |
<p>A revolving door (1), particularly for the protection of the access to a room, comprises a rotating shaft (2), a number of door wings (3) spaced around it and mounted thereto and a pair of opposite panels (4) bordering the door wings and defining a partly closed zone (5) with a first (6) and a second opening (7). Further a drive motor (9) for the shaft (2) and a control unit (10) for the drive motor (9) are provided. The revolving door (1) is provided with a detection means for detecting a person authorized or unauthorized to access the room, and a first sensor for detecting an unauthorized person entering the zone through the first (6) or the second opening (7) respectively. The control unit (10) turns off the drive motor (9) in response to the first sensor. A second sensor (18) is adapted to detect the presence of an unauthorized person outside said zone in or close to the first (6) or second opening (7) respectively, wherein the control unit (10) turns off the drive motor (9) in response to said second sensor (18). <IMAGE></p> |
