Method and system for determining displacement of an anchor

摘要

A method for determining a displacement of an anchor comprises the steps of: determining an initial position of the anchor; determining a displacement of the anchor by measuring anchor acceleration values, measuring at least one further physical quantity associated with the anchoring, deciding whether the anchor is at rest or in motion, wherein a value of the further physical quantity is taken into account in the decision, and integrating the acceleration values twice over time during intervals when the anchor is deemed to be in motion.

主权项

1. A method for determining a displacement of an anchor, the method comprising the steps of:
(a) determining an initial position of the anchor; (b) determining a displacement of the anchor by i. measuring anchor acceleration values using an acceleration sensor, ii. measuring at least one further physical quantity associated with the anchor using an auxiliary sensor to determine intervals when the anchor is at rest, iii. transmitting data related to the measured anchor acceleration values, and related to the measured at least one further physical quantity, to a communication module, iv. using the data transmitted at step iii to determine intervals during which the anchor is at rest or in motion, v. during intervals when the anchor is deemed to be in motion, integrating the acceleration values twice over time to determine the displacement of the anchor, and vi. correcting the integration of the acceleration values based on the anchor acceleration values measured by the acceleration sensor during intervals when the anchor is deemed to be at rest, thereby improving the determination of the displacement of the anchor from the initial position; and (c) displaying at least one of the displacement and an absolute movement of the anchor on a display.