A method includes obtaining, by a processing module of a data logging device, a log command. The method further includes determining, by the processing module, whether to enter a finished mode for the data logging device based on a data logging condition. When not in the finished mode and in response to the log command, the method further includes obtaining, by the processing module, a measure of an environmental condition. The method further includes determining, by the processing module, whether the measure of the environmental condition is within an expected range. When the measure of the environmental condition is not within the expected range, the method further includes generating, by the processing module, an environmental violation signal when triggered.

In one embodiment, an apparatus comprises processing circuitry to: receive wireless signal data corresponding to an RFID tag, wherein the wireless signal data comprises signal strength data and signal phase data corresponding to wireless signals transmitted by the RFID tag and received by an RFID reader; generate decomposed signal strength data based on a seasonal decomposition of the signal strength data; generate a frequency-phase curve based on the signal phase data; extract a set of signal strength features based on the decomposed signal strength data; extract a set of signal phase features based on the frequency-phase curve; and detect a motion state of the RFID tag using a machine learning classifier, wherein the machine learning classifier is trained to detect the motion state based on the set of signal strength features and the set of signal phase features.

Systems and methods for self-checkout at a point-of-sale are provided. The system and method includes using a plurality of radio frequency identification (RFID) transceivers within a store, and an RFID reader configured to receive an RFID code from an RFID tag activated by the plurality of radio frequency identification (RFID) transceivers. The system and method also includes using a classifier configured to determine whether the RFID tag is inside or outside a designated area, wherein the classifier is trained in a manner that a number of items incorrectly identified as being purchased is below a threshold to minimize customer dissatisfaction (CDS) determined as the ratio of the value of items charged to the customer but not purchased by a customer to the total charge to the customer.

Disclosed are various embodiments for a light bulb or other type of lighting fixture that integrates a light source and a radio frequency identification (RFID) reader. Embodiments of the disclosure can also forward identifiers corresponding to RFID tags detected by the RFID reader to another computing device that can facilitate identification of products or items associated with the RFID tags. RFID tags are energized with interrogator signals and/or an electromagnetic field emitted from the RFID reader and submit a response, which can be forwarded, or data extracted and transmitted, to another computing device.

The a system for measuring distance between an RFID reader and tag, including an adaptive linear combiner, which is a tapped delay line with controllable weights on each tap, and outputs that are summed and subtracted from a reference to produce an error signal. After a sufficient number of cycles, the weight distribution indicates the delay of the received signal with respect to the reference, and by extension determines the distance between the tag and receiver.

A communication device includes a communicator that communicates with an RF tag in a non-contact manner, a communication unit that exchanges data with a host device, and a controller that controls the communicator and the communication unit. Every time the communicator sequentially reads data from the RF tag that passes a communication-feasible region near the communicator at regular time intervals or irregular time intervals, the controller updates first data to be exchanged with the host device by the communication unit so as to include the read data. Also, the controller updates second data to be exchanged with the host device by the communication unit to a value different from a previous value in association with timing with which the first data is updated.

Multiple sensing network units are deployed overhead in a venue. Each unit supports a motion detecting system for detecting a level of motion in a zone of the venue, and an RFID locationing system for reading RFID tags in the venue, in response to the motion level detected by the motion detecting system. The performance of the RFID locationing system is adjusted and optimized in response to the detected motion level.

A monitoring system to monitor a monitoring region includes a number of identifying devices, a number of cameras corresponding to the identifying devices, at least one server, and a monitoring center. The monitoring region includes multiple monitoring sub-regions. The identifying devices are located in the monitoring sub-regions, and identifies a number of signal generating devices entering the monitoring sub-regions. Each camera is located in a corresponding monitoring sub-region, and obtains images of the corresponding monitoring sub-region. The server stores current positions and images of the signal generating devices. The monitoring center searches for a certain signal generating device. If the certain signal generating device is found by the identifying devices, the monitoring center activates the camera corresponding to the monitoring sub-region in which the certain signal generating device is located, and displays images of the certain signal generating device in real time.

An RFID portal of an EAS system first interrogates a first zone extending into a controlled area beyond a threshold distance from an interrogating antenna of the portal. The portal defines an exit from the controlled area, the threshold distance being less than a width of the exit. The portal first detects, in response to the first interrogating, a first response of a particular RFID tag. The portal second interrogate, subsequent to the first detecting, in a second zone extending into the controlled area at least to the threshold distance. The portal second detects, in response to the second interrogating, at least one second response of the particular RFID tag indicating a received signal strength of the second interrogating at the particular RFID tag corresponding to a distance from an interrogating antenna of the portal less than the threshold distance. The EAS system alarms in response to the second detecting.

A read chamber device disclosed for use within a radio frequency identification (RFID) scanning enclosure which provides a means of reading a plurality of cartons moving through the enclosure via a conveyor belt. The enclosure is positioned over a section of the conveyor belt, such that the plurality of cartons on the conveyor belt pass directly through the enclosure. The read chamber device that may be positioned centrally to the enclosure and projects a read zone via an antenna positioned centrally within the read chamber device. The read chamber device provides for tuning the read zone via a movable metal plate comprising absorber material components secured to it, that is positioned at variable distances to partially or fully cover the read zone. The metal plate is moved into the read zone to obstruct a percentage of radio frequency energy from escaping the read zone, and thus narrowing the total read field.