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公开(公告)号：US10459103B1
公开(公告)日：2019-10-29
申请号：US15280869
申请日：2016-09-29
Applicant: AMAZON TECHNOLOGIES, INC.
Inventor： Qicai Shi , Christopher Raymond Grajewski , Camerin Cole Hahn
Abstract: An entry portal to a facility includes magnets to produce a magnetic field and a proximity sensor to detect passage of a user. A portable device carried by a user detects the magnetic field and generates magnetometer data which is then sent to the portal along with a device identifier. The magnetometer data is compared to expected magnetic field data to determine presence at the portal. Timestamps of the magnetometer data and data from the proximity sensor may be compared to determine whether the two events occurred contemporaneously. If so, the portable device is deemed to be present at the portal. The device identifier may be used to determine a user, and entry data indicative of entry of the user may be generated. Subsequently, the user may then be tracked using sensors in the facility.
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公开(公告)号：US10198710B1
公开(公告)日：2019-02-05
申请号：US15082903
申请日：2016-03-28
Applicant: AMAZON TECHNOLOGIES, INC.
Inventor： Camerin Cole Hahn , Qicai Shi , Christopher Raymond Grajewski , Vinod Lakhi Hingorani , Nathan Pius O'Neill
IPC: G06Q10/08 , G01G19/414 , G01D5/24
Abstract: Various sensors may be used to gather information about items at an inventory location, such as items on a shelf. Weight sensors may be used to gather weight data while capacitive sensors detect the presence of one or more objects such as the items themselves, a user reaching towards the shelf, and so forth. Data from a capacitive sensor may be used to determine that an activity is taking place at the shelf and to trigger processing of weight data from the weight sensor. A combination of a change in capacitance that exceeds a capacitance threshold and a change in weight that exceeds a weight threshold may be used to determine an event, such as a pick or place from the inventory location.
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