Modifying RFID system operation using movement detection

• US 9,311,799 B2
• Filed: 03/18/2014
• Issued: 04/12/2016
• Est. Priority Date: 03/18/2014
• Status: Active Grant

• Current Assignee: Symbol Technologies, LLC (Zebra Technologies Corporation)
• Original Assignee: Symbol Technologies, LLC (Zebra Technologies Corporation)
• Inventors: Pandey, Aparna, Stern, Miklos, Jain, Binit, Ekl, Randy L, Griesmann, Daniel S
• Primary Examiner(s): MULLEN, THOMAS J
• Application Number:
  US14/217,551
• Publication Number:
  US 20150269818A1
• Time in Patent Office: 756 Days
• Field of Search: 340/572.1, 340/10.1
• US Class Current: 1/1
• CPC Class Codes: G06K 7/10128 the step consisting of detection of the presence of one or more record carriers in the vicinity of the interrogation device
• CPC Class Codes: G08B 13/248 EAS system combined with another detection technology, e.g. dual EAS and video or other presence detection system
• CPC Class Codes: G08B 13/2488 Timing issues, e.g. synchronising measures to avoid signal collision, with multiple emitters or a single emitter and receiver

Abstract

A technique for modifying radio frequency identification (RFID) system operation using movement detection includes an RFID scanner disposed within an environment and operable to obtain RFID data from RFID tags located within the environment. An imaging device captures video of the environment, and a processor analyzes the captured video from the imaging device to detect and locate movement within the environment. If movement is detected within the environment, the processor modifies operation of the RFID scanner that is proximal to the location of the movement, increasing or decreasing interrogation rate, for example.

Claims

1. A system for modifying radio frequency identification (RFID) system operation using movement detection, the system comprising:

at least one RFID scanner disposed within an environment and operable to obtain RFID data from RFID tags located within the environment;

at least one movement detection device operable for capturing movement within the environment; and

a processor coupled to the at least one RFID scanner and the at least one movement detection device, the processor also coupled to a user interface and a database containing known locations of the at least one RFID scanner in the environment, the processor operable to analyze the captured movement from the movement detection device to detect and locate movement within the environment;

wherein, if movement is detected within the environment, the processor is further operable to modify operation of the RFID scanner that is proximal to the location of the movement,

wherein the database also stores locations of RFID tags in the environment,

and wherein if the at least one RFID scanner is originally able to read an RFID tag at its stored location and then;

when the at least one RFID scanner is unable to read that same RFID tag at that same location, and the processor detects no movement between these two events, then the database will not be changed, indicating that the RFID tag is still present at that location;

or,

when a further RFID scanner is able to read that same RFID tag at a different location, and the processor detects no movement between these two events, then the database will not be changed, indicating that the RFID tag is still present at its previously stored location.

2. The system of claim 1, wherein the processor dynamically modifies a beam scan pattern of the at least one RFID scanner such that the at least one RFID scanner scans for RFID tags more frequently in the location of the movement compared to further RFID scanners in other areas in the environment where there is lesser or no movement.

3. The system of claim 2, wherein a duration of the modification is relative to the amount of movement in the location.

4. The system of claim 2, wherein the processor dynamically modifies a beam scan pattern of those RFID scanners proximal to locations with no detected movement by directing those RFID scanners to scan for RFID tags less frequently in those locations of no detected movement compared to RFID scanners in other areas in the environment where there is some movement.

5. The system of claim 2, wherein the modification includes changing the rate of interrogations of the at least one RFID scanner over time.

6. The system of claim 1, wherein the at least one movement detection device includes an imaging device for capturing video of the environment and the processor is part of a video analytics system.

7. The system of claim 6, wherein the database also stores image attributes of RFID-tagged items, and wherein the processor can detect movement of one of these RFID-tagged items in the environment using the image attributes, and wherein if the at least one RFID scanner continues to read the same number of RFID tags at the location of that one RFID-tagged item being moved, then the processor can raise an alert on the user interface.

8. The system of claim 6, wherein the database also stores image attributes of identified RFID-tagged items, and wherein the processor can identify and detect movement of one of these RFID-tagged items in the environment using the image attributes, and wherein if the at least one RFID scanner continues to read, at the same location, the RFID tag of that one identified RFID-tagged item being moved, then the processor can raise an alert on the user interface.

9. The system of claim 1, wherein the processor is further operable to analyze the captured movement to detect movement of people and RFID-tagged items in the environment.

10. The system of claim 1, wherein the at least one movement detection device includes an audio detection system coupled to the processor and installed in a localized area of the environment, wherein if audio is detected greater than a predetermined threshold, then movement is indicated in that localized area by the audio detection system to the processor.

11. The system of claim 1, wherein the at least one movement detection device includes an infrared sensor system coupled to the processor and installed in a localized area of the environment, wherein if the infrared sensor system is triggered, then movement is indicated in that localized area by the infrared sensor system to the processor.

12. The system of claim 1, wherein the processor is further operable to keep a record of movement over time to predict a future location where that movement leads in order to modify operation of one or more of a plurality of RFID scanners, including the at least one RFID scanner, that is proximal to the future location of the movement.

13. The system of claim 1, wherein the modification includes changing the transmit power of the RFID scanner over time.

14. The system of claim 1, wherein the at least one movement detection device includes one or more of an imaging device, an audio detection device, and an infrared device.

15. A system for modifying radio frequency identification (RFID) system operation using movement detection, the system comprising:

at least one RFID scanner disposed within an environment and operable to obtain RFID data from RFID tags located within the environment;

at least one imaging device operable for capturing video of the environment; and

a processor coupled to the at least one RFID scanner and the at least one imaging device, the processor also coupled to a user interface and a database containing known locations of the at least one RFID scanner in the environment, the processor being part of a video analytics system, the processor operable to analyze the captured video from the at least one imaging device to detect and locate movement within the environment;

wherein, if movement is detected within the environment, the processor is further operable to modify operation of the RFID scanner that is proximal to the location of the movement,

wherein the database also stores image attributes of RFID-tagged items,

and wherein the processor is further operable to one or more of;

detect movement of one of these RFID-tagged items in the environment using the image attributes, and wherein if the at least one RFID scanner continues to read the same number of RFID tags at the location of that one RFID-tagged item being moved, then the processor can raise an alert on the user interface; and

,

identify and detect movement of one of these RFID-tagged items in the environment using the image attributes, and wherein if the at least one RFID scanner continues to read, at the same location, the RFID tag of that one identified RFID-tagged item being moved, then the processor can raise the alert on the user interface.

16. A method for modifying radio frequency identification (RFID) system operation using movement detection, the method comprising:

storing, in a database, known locations of at least one RFID scanner in an environment and locations of RFID tags in the environment, the at least one RFID scanner operable to obtain RFID data from the RFID tags located within the environment;

scanning, using one or more of the at least one RFID scanner, the RFID tags located within the environment;

capturing, using at least one movement detection device, movement within the environment;

analyzing, using a processor coupled to the at least one RFID scanner, the at least one movement detection device, and the database, the captured movement from the movement detection device to detect and locate movement within the environment; and

if movement is detected within the environment, modifying, using the processor operation of the RFID scanner that is proximal to the location of the movement wherein if the at least one RFID scanner is originally able to read an RFID tag at its stored location and then;

when the at least one RFID scanner is unable to read that same RFID tag at that same location, and the processor detects no movement between these two events, then the database will not be changed, indicating that the RFID tag is still present at that location;

or,

when a further RFID scanner is able to read that same RFID tag at a different location, and the processor detects no movement between these two events, then the database will not be changed, indicating that the RFID tag is still present at its previously stored location.

17. A method for modifying radio frequency identification (RFID) system operation using movement detection, the method comprising:

storing, in a database, known locations of at least one RFID scanner in an environment and image attributes of RFID-tagged items, the at least one RFID scanner operable to obtain RFID data from RFID tags located within the environment;

scanning, using one or more of the at least one RFID scanner, the RFID tags located within the environment;

capturing, using at least one imaging device, video within the environment;

analyzing, using a processor coupled to the at least one RFID scanner, the at least one imaging device, the database, and a user interface, the video from the at least one imaging device to detect and locate movement within the environment;

if movement is detected within the environment, modifying, using the processor, operation of the RFID scanner that is proximal to the location of the movement;

detecting, using the processor, movement of one of these RFID-tagged items in the environment using the image attributes, and wherein if the at least one RFID scanner continues to read the same number of RFID tags at the location of that one RFID-tagged item being moved, then raising, using the processor, an alert on the user interface; and

,

identifying and detecting, using the processor, the movement of one of these RFID-tagged items in the environment using the image attributes, and wherein if the at least one RFID scanner continues to read, at the same location, the RFID tag of that one identified RFID-tagged item being moved, then raising, using the processor, an alert on the user interface.