Floor Machine and Surface Cleaning Within a Field of RFID Tags

• US 20090212103A1
• Filed: 02/02/2009
• Published: 08/27/2009
• Est. Priority Date: 02/01/2008
• Status: Abandoned Application

• Current Assignee: Tennant Company
• Original Assignee: Tennant Company
• Inventors: Li, Eric C., Erko, Robert J.
• Application Number:
  US12/364,345
• Publication Number:
  US 20090212103A1
• Time in Patent Office: Days
• US Class Current: 235/375
• CPC Class Codes: A47L 2201/04 Automatic control of the travelling movement; Automatic obstacle detection
• CPC Class Codes: G01S 13/74 Systems using reradiation of radio waves, e.g. secondary radar systems; Analogous systems
• CPC Class Codes: G01S 13/751 wherein the responder or reflector radiates a coded signal
• CPC Class Codes: G01S 13/876 Combination of several spaced transponders or reflectors of known location for determining the position of a receiver G01S13/874 takes precedence
• CPC Class Codes: G01S 5/14 Determining absolute distances from a plurality of spaced points of known location
• CPC Class Codes: G05D 1/0261 using magnetic plots
• CPC Class Codes: G05D 1/0274 using mapping information stored in a memory device navigation using map-matching G01C21/30

Abstract

A machine and method of use for cleaning a floor surface by traversing the floor field with a floor cleaning machine having an RFID system and accessing a plurality of RFID tags within the floor field to determine a position of the cleaning machine within the floor field during a cleaning session. An electronic map may be generated by and/or stored on the floor cleaning machine or may be remotely accessed during the floor cleaning session. A variety of information relating to machine operation characteristics and/or performance can be collected during the cleaning session in combination with machine location information from the RFID system.

Claims

1. A floor cleaning machine operating in a region of RFID tags comprising:

a floor maintenance tool carried by the floor cleaning machine, said floor maintenance tool performing a floor cleaning task as the floor cleaning machine traverses the region; and

an REID system including an REID reader accessing one or more of a plurality of RFID tags distributed throughout the region as the floor cleaning machine traverses the region during a cleaning session.

2. The floor cleaning machine of claim 1, wherein the RFID system includes RF information for each RFID tag from which a signal is received or signal strength of signals or both.

3. The floor cleaning machine of claim 2, wherein the RF information received from one or more tags includes unique tag identification information.

4. The floor cleaning machine of claim 3, wherein the plurality of RFID tags is regularly distributed throughout the region, and each of the tags emitting a signal including tag identification information.

5. The floor cleaning machine of claim 4, wherein RFID signal strength is used as an indicator to approximate the location by estimating a distance between machine and at least some of the plurality of tags.

6. The floor cleaning machine of claim 1, wherein the RFID system is operative to receive a transmission indicating RF signals received by the cleaning machine and to identify a location of the cleaning machine by comparing RE information received by the cleaning machine against RE information stored in association with the location identifiers.

7. The floor cleaning machine of claim 6, wherein the RFID system is operative to receive signal information from a wireless telephone carried by the cleaning machine.

8. The floor cleaning machine of claim 7, wherein the RFID system includes components at a location remote from the region where the tags are distributed.

9. A method of operating a portable floor cleaning machine, comprising:

dispersing a plurality of RFID tags throughout a floor field within which the location of the cleaning machine is to be identified;

traversing the flooring field with the cleaning machine during a cleaning operation;

accessing one or more of the RFID tags during said cleaning operation; and

utilizing information received during said accessing to determine the relative position of the cleaning machine based at least in part on said map.

10. The method of claim 9 further comprising:

mapping signals emitted by the REID tags against locations within the floor field to define a map.

11. The method of claim 9 wherein the step of receiving signals emitted by the tags at the cleaning machine includes sequentially receiving signals as the cleaning machine moves in a path through the flooring field and wherein identifying the location of the cleaning machine includes identifying the location arrived at by following a path indicated by the sequentially received signals.

12. A method of floor cleaning machine localization comprising:

mapping signals emitted by a plurality of RFID tags distributed throughout a region of the floor field to define a floor map;

traversing the floor field during a floor cleaning operation; and

accessing one or more RFID tags and the floor map during said traversing to determine a location of the cleaning machine during the cleaning operation.

13. The method of claim 12 further comprising:

receiving a transmission from cleaning machine indicating RF signals received by the cleaning machine and comparing the RF signals received by the cleaning machine against RF signals associated with each location in the floor map of locations and identifying the location of the cleaning machine as the location associated with RF signals most closely matching the RF signals received by the cleaning machine.

14. A method of operating a floor cleaning machine comprising:

cleaning a floor surface by traversing the floor field with the floor cleaning machine,

during said cleaning, accessing a RFID tag; and

utilizing information received during said accessing to determine a position of the cleaning machine within the floor field.

15. The method of claim 14 further comprising:

mapping signals emitted by a plurality of RFID tags and storing a map of locations of said plurality of RFID tags.

16. The method of claim 15 wherein said dispersing includes associating one of the plurality of RFID tags with a floor tile.

17. The method of claim 16 wherein the floor tile is a carpet tile and said one of the plurality of REID tags is secured to the carpet tile.

18. The method of claim 14 wherein said utilizing includes using a controller on the cleaning machine to accesses an electronic map of RFID locations.

20. The method of claim 14 further comprising:

periodically updating a map of RFID locations during operation of the cleaning machine.

19. The method of claim 19 wherein the electronic map is stored on the cleaning machine or stored at a remote location or both.

21. A method of operating a floor cleaning machine comprising:

cleaning a floor surface by traversing the floor field with the floor cleaning machine,

during said cleaning, accessing a plurality of RFID tags; and

utilizing information received during said accessing to determine a floor cleaning machine performance characteristic.

22. The method of claim 21 further comprising:

providing a report of machine operation based on said determined floor cleaning machine performance characteristic.

23. The method of claim 21 further comprising:

during said cleaning, determining a machine operation status and associating said machine operation status with one or more of the plurality of RFID tags.

24. The method of claim 22 wherein the report provides an indication of area cleaned during a cleaning session or machine efficiency or both.