Method for eliminating accumulative errors of track plotter

Abstract

The invention discloses a method for eliminating accumulative errors of a track plotter. The method comprises the following steps: 1) locating a drawing pen at the zero position of a sea chart; 2) setting a time interval for eliminating accumulative errors; 3) calculating pen moving pulse information (X, Y) by using the track plotter; 4) starting pen moving; 5) beginning timing from a starting point; 6) repeating step 3) to step 5) if the time interval is not reached; 7) calculating direct pen moving pulse information (XX, YY) from starting point to current point if the time interval is reached; 8) calculating total pen moving pulse information (X', Y'); 9) calculating pen moving pulse information (delta X, delta Y) of the accumulative errors and carrying out error compensation pen moving according to the pen moving pulse information (delta X, delta Y) of the accumulative errors; and 10) repeating step 3) to step 10) when the drawing pen arrives at a target point until current plotting operation is finished. The method provided by the invention can effectively reduce or eliminate the accumulative errors of the track plotter and improve the plotting precision of the track plotter.

Description

technical field [0001] The invention relates to the technical field of track instruments, in particular to a method for eliminating accumulated errors of track instruments. Background technique [0002] The track instrument is a navigation device for ships to plot charts in real time and automatically complete chart operations. In the development process of the track instrument, by improving the accuracy of each transmission part and adopting a reasonable mathematical model for chart plotting and calculation, the plotting accuracy of the track instrument has made great progress, and its plotting accuracy can reach the full chart of the commonly used chart 0.2% of the width (980mm), that is, about 2mm. Plotting accuracy is a technical indicator that mariners attach great importance to, and it is directly related to the safety of navigation and the firing rate of weapons. [0003] With the development of modern technology, modern ships have higher and higher requirements for...

AI Technical Summary

Problems solved by technology

Every time the tracker moves the pen, it must be converted into the number of motor pulses in the X and Y directions, which must be rounded to obtain an integer motor pulse value. Although there is a compensation algorithm for this, it is impossible to completely eliminate the cumulative error. It is inevitable. and exist

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