| 摘要 |
An indicating device for indicating a non-authorized opening of an aircraft door comprising a sensor for detecting a distance from the sensor to an object, a signaling device, a reset device coupled to the signaling device allowing the signaling device to be set into a first state following a reset operation, an enabling device, providing as an output signal, selectively, a disable signal and an enable signal, and a control device connected to the sensor, the signaling device and the enabling device. On receiving the disable signal, the control device changes into a first operating mode and on receiving the enable signal it changes into a second operating mode in which, based upon the signal received from sensor, it detects a distance change between the sensor and the object, and, on detecting a change, sets the signaling device into a second state until the reset operation is completed. |
| 主权项 |
1. An indicating device for indicating an unauthorized opening of a door of an aircraft parked on the ground, comprising:
a sensor configured to detect a distance between the sensor and an object that is located inside a detection zone in front of the sensor, a signaling device, which has a first state and a second state, a reset device that is connected to the signaling device and that is configured to set said signaling device into the first state when a user carries out a predetermined reset operation, an enabling device, which is configured to provide as an output signal, selectively, a predetermined disable signal and a predetermined first enable signal, and a control device, which is connected to the sensor, the signaling device and the enabling device and is configured: to change into a first operating mode when receiving the disable signal and to change into a second operating mode when receiving the first enable signal, in which second operating mode it detects, based upon a sensor signal provided by the sensor and characteristic for the distance between the sensor and the object, a change of the distance between the sensor and the object and, upon detection of a change, sets the signaling device into the second state until the predetermined reset operation is carried out, so that, following arrangement of the sensor on a door of the aircraft, which door is located at a distance from a stationary component in the interior of an aircraft, or on the stationary component in such a manner that the stationary component and the door, respectively, is located within the detection zone of the sensor and an opening of the door causes a change of the distance between the sensor and the stationary component and the door, respectively, and the subsequent provision of the first enable signal by the enabling device with the door closed, a change of the signaling device from the first state into the second state indicates that the door has been opened. |
