# US 2021/0241593 A1 · System and method for increased exit interrogation of rfid tags > Agents: this data is available as JSON from the patentgrep API and MCP server — see https://patentgrep.com/llms.txt - Number: US 2021/0241593 A1 - Document ID: US20210241593A1 - Status: Published application - Kind: A1 - Application number: 17/162,724 - Filed: 2021-01-29 - Published: 2021-08-05 - Earliest claimed: 2020-01-31 - Assignees: Sensormatic Electronics Corporation - Applicants: Sensormatic Electronics, LLC - Inventors: John A. Allen; Michael Del Busto - Web page: https://patentgrep.com/patent/US20210241593A1 ## CPC - G08B 13/2468: {Antenna in system and the related signal processing} - G08B 13/248: {EAS system combined with another detection technology, e.g. dual EAS and video or other presence detection system} - G06K 7/10099: {the directional field being used for pinpointing the location of the record carrier, e.g. for finding or locating an RFID tag amongst a plurality of RFID tags, each RFID tag being associated with an object, e.g. for physically locating the RFID tagged object in a warehouse} - G06K 7/10316: {using at least one antenna particularly designed for interrogating the wireless record carriers (antennas in general H01Q1/22)} - G06K 7/10425: {the interrogation device being arranged for interrogation of record carriers passing by the interrogation device} - G08B 13/2417: {having a radio frequency identification chip} - G08B 13/2488: {Timing issues, e.g. synchronising measures to avoid signal collision, with multiple emitters or a single emitter and receiver} - H04B 5/77: for interrogation - H04B 7/0421: {utilizing implicit feedback, e.g. steered pilot signals} - G08B: SIGNALLING SYSTEMS, e.g. PERSONAL CALLING SYSTEMS; ORDER TELEGRAPHS; ALARM SYSTEMS - G06K: GRAPHICAL DATA READING (image or video recognition or understanding G06V); PRESENTATION OF DATA; RECORD CARRIERS; HANDLING RECORD CARRIERS - H04B: TRANSMISSION ## Abstract In an aspect, the present disclosure includes a system for interrogating a person exiting a store. The system comprises one or more pedestals positioned to define an exit portal leading to a point of exit, one or more mmWave sensors, fixedly positioned near the point of exit, configured to receive one or more reflected mmWave beams from a person approaching the point of exit and triggering an interrogation of a security tag; and one or more security tag readers, fixedly positioned with the one or more pedestals, configured to read data from the security tag passing through the exit portal ## Claims ### Claim 1 A system for interrogating a person exiting a store, comprising: one or more pedestals positioned to define an exit portal leading to a point of exit; one or more mmWave sensors, fixedly positioned near the point of exit, configured to receive one or more reflected mmWave beams from a person approaching the point of exit and triggering an interrogation of a security tag; and one or more security tag readers, fixedly positioned with the one or more pedestals, configured to read data from the security tag passing through the exit portal in response to triggering the interrogation. ### Claim 2 (depends on 1) The system of claim 1, wherein the one or more security tag readers are further configured to steer one or more reader beams of the one or more security tag readers toward the person. ### Claim 3 (depends on 1) The system of claim 1, wherein each of the one or more security tag readers is further configured to: transmit a plurality of interrogation signals; and receive a plurality of response signals in response to the plurality of interrogation signals transmitted. ### Claim 4 (depends on 1) The system of claim 1, further comprising an exit system of the system configured to: steer beams of a first subset of the one or more security tag readers toward the person; and disable a second subset of the one or more security tag readers, wherein the second subset include security tag readers beyond a threshold distance from the point of exit. ### Claim 5 (depends on 1) The system of claim 1, wherein: the one or more mmWave sensors are further configured to determine at least a distance between the one or more mmWave sensors and the person. ### Claim 6 (depends on 5) The system of claim 5, wherein the one or more security tag readers are further configured to read the data from the security tag when the distance is below a threshold. ### Claim 7 A method of interrogating a person exiting a store, comprising: transmitting one or more interrogation mmWave beams to a person approaching a point of exit; receiving one or more reflected mmWave beams from the person; triggering an interrogation of a security tag in response to receiving the one or more reflected mmWave beams; and reading data from the security tag. ### Claim 8 (depends on 7) The method of claim 7, wherein triggering the interrogation of the security tag comprises steering one or more beams of one or more security tag readers toward the person. ### Claim 9 (depends on 7) The method of claim 7, wherein triggering the interrogation of the security tag comprises: transmitting a plurality of interrogation signals; and receiving a plurality of response signals in response to the plurality of interrogation signals. ### Claim 10 (depends on 7) The method of claim 7, wherein triggering the interrogation of the security tag comprises: steering beams of a first subset of the one or more security tag readers toward the person; and disabling a second subset of the one or more security tag readers, wherein the second subset include security tag readers beyond a threshold distance from the point of exit. ### Claim 11 (depends on 7) The method of claim 7, further comprising: determining at least a distance between the one or more mmWave sensors and the person. ### Claim 12 (depends on 11) The method of claim 11, wherein reading the data comprises reading the data from the security tag in response to the distance being below a threshold. ### Claim 13 (depends on 11) The method of claim 11, further comprises suspending the interrogation in response to the first distance being above a threshold. ### Claim 14 A non-transitory computer readable medium comprising instructions that, when executed by one or more processors, cause the one or more processors to: cause one or more mmWave transmitters to transmit one or more interrogation mmWave beams to a person approaching a point of exit; cause one or more mmWave sensors to receive one or more reflected mmWave beams from the person; triggering an interrogation of a security tag in response to receiving the one or more reflected mmWave beams; and reading data from the security tag. ### Claim 15 (depends on 14) The non-transitory computer readable medium of claim 14, wherein the instructions for triggering the interrogation comprises instructions for steering one or more beams of one or more security tag readers toward the person. ### Claim 16 (depends on 14) The non-transitory computer readable medium of claim 14, wherein the instructions for triggering the interrogation comprises instructions for: transmitting a plurality of interrogation signals; and receiving a plurality of response signals in response to the plurality of interrogation signals. ### Claim 17 (depends on 14) The non-transitory computer readable medium of claim 14, wherein the instructions for triggering the interrogation comprises instructions for: steering beams of a first subset of the one or more security tag readers toward the person; and disabling a second subset of the one or more security tag readers, wherein the second subset include security tag readers beyond a threshold distance from the point of exit. ### Claim 18 (depends on 14) The non-transitory computer readable medium of claim 14, further comprising instructions for: determining at least a distance between the one or more mmWave sensors and the person. ### Claim 19 (depends on 18) The non-transitory computer readable medium of claim 18, wherein the instructions reading the data comprises instructions for reading the data from the security tag in response to the distance being below a threshold. ### Claim 20 (depends on 18) The non-transitory computer readable medium of claim 18, further comprising instructions for suspending the interrogation in response to the first distance being above a threshold.