| Popis: |
Anchor dragging threatens vessel anchoring security directly, so how to find and predict anchor drgging is an important issue of navigation fields. Most existing judgement methods depend on distinguishing feature of dragging vessel from normal anchoring, so vessels usually have moved a certain distance when duty officers find anchor dragging. Thus it is necessary to develop a practical anchor dragging early warning techonology. Based on the special change of anchor cables. Vibration frequency while anchor dragging, a new anchor dragging early warning system (ADEWS) was designed. The system was composed of two main facilities: acceleration sensor and teminal unit. The acceleration sensor was fixed on anchor cables to monitor its vibration frequency, and the teminal unit in the bridge was designed to analyze change characteristic of frequency and release early warnning. For facilitis of this new ADEWS is simple, it is easy to be equipped on vessels. Furthermore, the system can automatically analyze vibration frequency and release early warning, so it has advantages of high feasibility and reliability. These advantages can lessen duty officers work burden and reduce the dependece on duty officers individual experience. Therefore, ADEWS based on Vibration frequency analysis possesses a good application prospect in practical engineering. |
