Signal processing for multi-sensor distance calculation and level measurement in a tank

A fill level sensor configured to determine a fill level in a container, the fill level sensor comprising a sensor array comprising a plurality of sensor elements configured to measure a distance;

• and level measurement processing circuitry configured to:
• acquire a plurality of fill level measurement values from the sensor array;
• remove measurement values for selected sensor positions in the sensor array using a geometric filter;
• determine a signal strength for each measurement value and removing measurement values having a signal strength below a predefined signal strength threshold value;
• determine at least two quality values for each remaining measurement value, where the quality values are determined based on two or more of standard deviation, signal strength, logical evaluation, and geometric position of the sensor within the sensor array;
• apply a weighting factor to each determined quality value and for each measurement value to determine a quality contribution value for each quality value;
• determine a total quality contribution value for each measurement value by combining the respective weighted quality values;
• determine a weighted measurement value for each remaining measurement value as the measurement value combined with the respective total quality contribution value;
• and
• determine a final fill level value as an average of the weighted measurement values.