System and method for determining an energy-efficient path of an autonomous device

A method for determining an energy-efficient path of an autonomous device wherein said autonomous device moves over a global grid of cells into which a given operating area has been split, the method being characterized in that determination of said energy-efficient path comprises the steps of:

• processing of the current cell (201);
• taking a measurement σ of the processing (202);
• classifying the measurement σ to be of a particular level Σ (203), taking into account a predefined division, of the measurements results range, into a plurality of measurements levels;
• storing said classified measurement in a memory of the autonomous device (204) and associating it with the current cell;
• selecting a reference probability grid (205) wherein values in the cells of the reference grid express a probability that the measurement of the processing (202) will be the same in its respective cell as it is in the current cell (103), which represents the current position of the autonomous device, whereas a centre cell, associated with the current cell (103), is assigned a maximum probability while other cells within the reference grid (100) have a probability assigned, which lowers with an increase of a distance of a cell from the current cell (103);
• updating (207) the probabilities by applying the reference grid (100) to the global grid at its current position such that every cell on the reference grid (100) corresponds unambiguously to one cell on the global grid;
• and
• moving the autonomous device to a next cell of the global grid (208) and setting said next cell as the current cell (201) in order to process the next cell.