| 摘要 |
Systems and methods for reading Radio Frequency Identified (RFID) tags. In an embodiment, an enclosure having, within it, an antenna and processor is provided. The processor may be configured to record tag observations for tag identifiers received by the antenna from RFID tags. For one or more time intervals, tag observations may be identified which satisfy a tag filter, and a confidence that RFID tags satisfying the tag filter were in the field of view of the antenna during the time interval may be computed based on the identified tag observations. According to an embodiment, reports for tag filters may be then generated using the computed confidences, and these reports may be transmitted to an external system over a network. |
| 主权项 |
1. A system for reading Radio Frequency Identifier (RFID) tags, the system comprising:
an enclosure comprising a dome-shaped front surface and a substantially flat back surface, wherein the substantially flat back surface comprises a recess and a plug which is collapsible into the recess; at least one antenna within the enclosure and configured to receive one or more tag identifiers from one or more RFID tags, wherein the enclosure comprises a space between the dome-shaped front surface and the at least one antenna; and at least one processing unit housed within the enclosure and configured to,
for each of one or more of the received one or more tag identifiers, record a tag observation comprising a tag identifier, a timestamp representing a time at which the tag identifier was received, and a signal strength at which the tag identifier was received,for each of a plurality of time intervals,
for each of one or more tag filters,
compute a confidence that RFID tags satisfying a tag filter were in a field of view of the at least one antenna during a time interval, wherein the confidence is computed based on one or more recorded tag observations which satisfy the tag filter and which occurred during the time interval,compute one or more statistics based on the signal strength of the one or more recorded tag observations which satisfy the tag filter and which occurred during the time interval,determine whether or not to transmit a report for the tag filter by, if a reporting interval for the tag filter has not expired, determine to not transmit the report for the tag filter, and, if the reporting interval for the tag filter has expired and if a difference between one or more of the confidence and the one or more statistics exceeds a threshold, determine to transmit the report for the tag filter, and,if it is determined to transmit the report for the tag filter, generate the report for the tag filter, andtransmit one or more reports generated for one or more of the one or more tag filters to an external system via at least one network. |
