Systems and methods for locating and determining the orientation of a handheld device

Patent metadata

Field	Value
Publication number	US-10134253-B2
Application number	US-201514730381-A
Country	US
Kind code	B2
Filing date	Jun 4, 2015
Priority date	Jun 4, 2015
Publication date	Nov 20, 2018
Grant date	Nov 20, 2018

Abstract

Systems (100) and methods (400) for determining a Handheld Reader's (“HR”) location within a facility. The methods involve: performing first operations by HR to read RFID tags having locations within the facility that are unknown to the handheld reader; performing second operations by HR to receive signals from RF Enabled Devices (“RFED”) located at known locations within the facility; and determining HR's location/orientation using RSSI levels or TOF values of signals received from RFEDs, known locations of RFEDs, sensor data, known antenna patterns of RFEDs, a known antenna pattern of HR, and/or (9) information indicating which RFID tags were read by HR and at least one RFED. The first and second operations are performed while HR is being carried by a person throughout the facility.

First claim

We claim:

1. A method for determining a location of a handheld reader within a facility, comprising: performing first operations by the handheld reader to read Radio Frequency Identifier (“RFID”) tags having locations within the facility that are unknown to the handheld reader; performing second operations by the handheld reader to receive first signals from a plurality of stationary Radio Frequency (“RF”) enabled devices located at known locations within the facility; determining at least one of an orientation of the handheld reader and a location of the handheld reader within the facility using a combination of at least two of (1) Received Signal Strength Indicator (“RSSI”) levels of the first signals, (2) known locations of the RF enabled devices associated with Time Of Flight (“TOF”) values, and (3) information indicating which RFID tags were read by the handheld reader and at least one of the RF enabled devices; and generating a multi-dimensional map showing the location of the handheld reader within the facility and the orientation of the handheld reader; wherein the first and second operations are performed while the handheld reader is being carried by a person throughout the facility.

2. The method according to claim 1 , wherein the first signals respectively comprise unique identifiers for the RF enabled devices.

3. The method according to claim 1 , wherein the RF enabled devices comprise RFID readers, beacons or RFID tags.

4. The method according to claim 1 , wherein the location of the handheld reader is determined using triangulation.

5. The method according to claim 1 , wherein the orientation or location of the handheld reader is further determined based on at least one of sensor data generated by people detection sensors disposed at known locations in the facility, Time-Of-Flight (“TOF”) values computed for the first signals, known locations of the RF enabled devices associated with the TOF values, sensor data generated by first sensors disposed in the handheld reader, sensor data generated by second sensors disposed at known locations within the facility, known antenna patterns of the RF enabled devices, and a known antenna pattern of the handheld reader.

6. The method according to claim 1 , wherein the first signals are sent from the RF enabled devices at different times or frequencies.

7. The method according to claim 1 , further comprising determining a location of at least one RFID tag within the facility relative to the location of the handheld reader which was previously determined.

8. A handheld reader, comprising: an electronic circuit configured to perform first operations to read Radio Frequency Identifier (“RFID”) tags having locations within the facility that are unknown to the handheld reader, perform second operations to receive first signals from a plurality of stationary Radio Frequency (“RF”) enabled devices located at known locations within the facility, and determine at least one of an orientation of the handheld reader and a location of the handheld reader within the facility using a combination of at least two of (1) Received Signal Strength Indicator (“RSSI”) levels of the first signals, (2) known locations of the RF enabled devices associated with Time Of Flight (“TOF”) values, and (3) information indicating which RFID tags were read by the handheld reader and at least one of the RF enabled devices; and generate a multi-dimensional map showing the location of the handheld reader within the facility and the orientation of the handheld reader; wherein the first and second operations are performed while the handheld reader is being carried by a person throughout the facility.

9. A system, comprising: a plurality of stationary Radio Frequency (“RF”) enabled devices located at known locations within the facility; a handheld reader performing first operations to read Radio Frequency Identifier (“RFID”) tags having locations within the facility that are unknown to the handheld reader, and second operations to receive first signals from a plurality of stationary Radio Frequency (“RF”) enabled devices located at known locations within the facility; and a computing device configured to determine an orientation of the handheld reader and a location of the handheld reader within the facility using a combination of at least two of (1) Received Signal Strength Indicator (“RSSI”) levels of the first signals, (2) known locations of the RF enabled devices associated with Time Of Flight (“TOF”) values, and (3) information indicating which RFID tags were read by the handheld reader and at least one of the RF enabled devices; and generate a multi-dimensional map showing the location of the handheld reader within the facility and the orientation of the handheld reader; wherein the first and second operations are performed while the handheld reader is being carried by a person throughout the facility.

10. The system according to claim 9 , wherein the first signals respectively comprise unique identifiers for the RF enabled devices.

11. The system according to claim 9 , wherein the RF enabled devices comprise RFID readers, beacons or RFID tags.

12. The system according to claim 9 , wherein the location of the handheld reader is determined using triangulation.

13. The system according to claim 9 , wherein the orientation or location of the handheld reader is further determined based on at least one of sensor data generated by people detection sensors, Time-Of-Flight (“TOF”) values computed for the first signals, known locations of the RF enabled devices associated with the TOF values, sensor data generated by first sensors disposed in the handheld reader, sensor data generated by second sensors disposed at known locations within the facility, known antenna patterns of the RF enabled devices, and a known antenna pattern of the handheld reader.

14. The system according to claim 9 , wherein the first signals are sent from the RF enabled devices at different times or frequencies.

15. The system according to claim 9 , wherein the computing device further determines a location of at least one RFID tag within the facility relative to the location of the handheld reader which was previously determined.

16. A method for determining a location of a handheld reader within a facility, comprising: performing first operations by the handheld reader to read Radio Frequency Identifier (“RFID”) tags having locations within the facility that are unknown to the handheld reader; performing second operations by the handheld reader to receive first signals from a plurality of stationary Radio Frequency (“RF”) enabled devices located at known locations within the facility; and determining at least one of an orientation of the handheld reader and a location of the handheld reader within the facility using a combination of at least two of (1) known locations of the RF enabled devices associated with Received Signal Strength Indicator (“RSSI”) levels, (2) known locations of the RF enabled devices associated with the TOF values, and (3) information indicating which RFID tags were read by the handheld reader and at least one of the RF enabled devices; generating a multi-dimensional map showing the location of the handheld reader within the facility and the orientation of the handheld reader; wherein the first and second operations are performed while the handheld reader is being carried by a person throughout the facility.

Assignees

• Trivelpiece Steve E
• Hosseini Alister
• Campero Richard J
• Trivelpiece Craig E
• Tyco Fire & Security Gmbh

Inventors

• Trivelpiece Steve E
• Hosseini Alister
• Campero Richard J
• Trivelpiece Craig E

Classifications

• G06Q10/087

  Inventory or stock management, e.g. order filling, procurement or balancing against orders · CPC title

• G06K19/0723

  the record carrier comprising an arrangement for non-contact communication, e.g. wireless communication circuits on transponder cards, non-contact smart cards or RFIDs · CPC title

• G01S11/06

  using intensity measurements · CPC title

• G08B13/2462 Primary

  Asset location systems combined with EAS (inventory, tracking, logistic G06Q10/00; entrance control systems G07C9/00) · CPC title

• G06K7/0008

  General problems related to the reading of electronic memory record carriers, independent of its reading method, e.g. power transfer · CPC title