System to process load cell data
AssigneeAmazon Technologies, Inc.
InventorsQicai Shi, Nathan Pius O'Neill
Life of this patent
Estimating the term…
Abstract
Shelves or other fixtures may be used to hold items at a facility. Load cells at the fixtures may be used to acquire weight data indicative of changes to the fixture as items are added or removed from the fixture. The fixtures, such as a freezer case, may include a door that when opened or closed results in air movement with respect to the shelves. This air movement may produce weight data that is erroneously indicative of a false event, such as a pick or place, even when no actual event has taken place. Weight data from load cells in the shelves may be analyzed to determine a correlation in the data from multiple shelves. If there is a high correlation in the changes to the weight data at multiple shelves, the weight data may be disregarded as being due to air movement.
Claims20
A system comprising:
- a fixture comprising:
- an insulated enclosure;
- a first shelf within the insulated enclosure;
- a first load cell configured to measure weight of a load on the first shelf and generate first weight data;
- a second shelf that is adjacent to the first shelf within the insulated enclosure;
- a second load cell configured to measure weight of a load on the second shelf and generate second weight data;
- a door configured to provide access to the first shelf and the second shelf;
- and
- a refrigeration unit configured to cool an interior of the insulated enclosure;
- and
- a computing device comprising:
- a memory storing first computer-executable instructions;
- and
- a hardware processor to execute the first computer-executable instructions to:
- determine a first correlation value indicative of a correlation between the first weight data and the second weight data during a first time interval;
- and
- determine, based on a comparison of the first correlation value to a threshold value, validity data indicative of validity of the first weight data and the second weight data during the first time interval.
A system comprising:
- a fixture comprising:
- an enclosure;
- a first shelf within the enclosure;
- a first load cell to measure weight of a load on the first shelf and generate first weight data;
- a second shelf within the enclosure and arranged within a threshold distance of the first shelf;
- and
- a second load cell to measure weight of a load on the second shelf and generate second weight data;
- and
- a computing device comprising:
- a memory storing first computer-executable instructions;
- and
- a hardware processor to execute the first computer-executable instructions to:
- access the first weight data associated with a first time interval;
- access the second weight data associated with at least a portion of the first time interval;
- determine a correlation value indicative of a correlation between the first weight data and the second weight data during the first time interval;
- and
- determine validity data of one or more of the first weight data or the second weight data based on the correlation value.
A method comprising:
- accessing, using a processor, weight data from a plurality of shelves of a fixture, wherein the weight data for each of the plurality of shelves is generated by a corresponding load cell at the each of the plurality of shelves;
- determining, using the processor, that the plurality of shelves are within a threshold distance of one another;
- determining, using the processor, a correlation value indicative of a degree of correlation, during a first time interval, between the weight data from different ones of the plurality of shelves;
- and
- determining, using the processor and based on the correlation value, validity data indicative of validity of the weight data of the first time interval.
Dependencies are inferred from the claim text.