System and method for locating objects

• US 9,594,151 B1
• Filed: 07/15/2016
• Issued: 03/14/2017
• Est. Priority Date: 09/05/2015
• Status: Active Grant

• Current Assignee: Dov Ehrman
• Original Assignee: TechIP International Limited
• Inventors: Teicher, Mordechai
• Primary Examiner(s): Phan, Dao
• Application Number:
  US15/211,201
• Publication Number:
  US 20170067983A1
• Time in Patent Office: 242 Days
• Field of Search: 342/451, 342/457, 342/463, 342/465, 455/41.2, 455/422.1, 455/457
• US Class Current: 1/1
• CPC Class Codes: A61B 5/1113 Local tracking of patients, e.g. in a hospital or private home
• CPC Class Codes: G01C 21/206 specially adapted for indoor navigation
• CPC Class Codes: G01S 1/68 Marker, boundary, call-sign, or like beacons transmitting signals not carrying directional information
• CPC Class Codes: G01S 5/0249 Determining position using measurements made by a non-stationary device other than the device whose position is being determined
• CPC Class Codes: G01S 5/0295 Proximity-based methods, e.g. position inferred from reception of particular signals
• CPC Class Codes: G07C 9/28 the pass enabling tracking or indicating presence
• CPC Class Codes: G07C 9/30 not involving the use of a pass
• CPC Class Codes: G08B 13/2417 having a radio frequency identification chip
• 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 21/0247 System arrangements wherein the alarm criteria uses signal strength
• CPC Class Codes: G08B 21/0261 System arrangements wherein the object is to detect trespassing over a fixed physical boundary, e.g. the end of a garden
• CPC Class Codes: G08B 21/0288 Attachment of child unit to child/article
• CPC Class Codes: G08B 21/22 responsive to presence or absence of persons

Abstract

A plurality of location beacons is deployed within a site that is divided into zones. A plurality of assets is distributed within the site, each asset having an asset beacon attached to it. A tag occasionally moving within the site continually locates its current zone by detecting short-range signals received from location beacons, and when detecting an asset beacon, the tag locates the respective asset within the current zone of the tag.

Claims

1. A method of operation of a tag for locating assets, the tag is borne by and occasionally moving with a user within a site that is divided into a plurality of zones, the method comprising:

receiving a first short-range signal from a location beacon associated with a current zone of the plurality of zones;

receiving a second short-range signal from an asset beacon attached to an asset;

retrieving from the second short-range signal an identification of at least one of the asset beacon or the asset;

wirelessly reporting the current zone to a recipient; and

wirelessly reporting the identification to the recipient.

2. The method of claim 1, further comprising:

checking availability of a network connection; and

wherein at least one of the reporting the current zone or the reporting the identification is postponed until the checking is positive.

3. The method of claim 1, wherein the reporting the current zone and the reporting the identification are included within a single locating message.

4. The method of claim 1 wherein the reporting the current zone is automatically made following the receiving a first short-range signal from a location beacon, and the reporting the identification is automatically made following the receiving a second short-range signal from an asset beacon.

5. The method of claim 1, wherein the user is a staff member and the tag is a staff tag that is further operative for directing the staff member toward target assets, the method further comprising:

receiving a target asset identifier and a target zone associated with a target asset;

presenting to the staff member a description of the target asset; and

presenting to the staff member directions for reaching the target zone.

6. The method of claim 5, wherein the staff member is designated to relocate the target asset, the method further comprising:

receiving a relocation assignment identifying a target location for the target asset;

detecting short-range beacon signals transmitted by a beacon of the target asset;

learning from the beacon signals that the staff tag and the beacon are in close proximity;

measuring the duration of the close proximity;

checking whether the staff tag has moved while the close proximity is maintained; and

based on the results of the measuring and the checking;

locating the target asset at the target location.

7. The method of claim 5, further comprising:

seeking beacon signals that match a beacon identifier of a beacon attached to the target asset; and

upon detecting a beacon signal that matches the beacon identifier;

producing a series of human-comprehensible homing directions for approaching the target asset.

8. The method of claim 7, wherein:

the directions for reaching the target zone including at least one of;

a name of the target zone, or

instructions for reaching the target zone;

the step of presenting directions including at least one of;

displaying text instructions,

displaying graphical guidance, or

playing audio instructions; and

the step of producing a series of homing directions including at least one of;

displaying a textual representation of a current strength of the detected beacon signal,

displaying a textual guidance regarding the direction of the beacon,

displaying a graphical representation of a current strength of the detected beacon signal,

displaying a graphical guidance regarding the direction of the beacon,

playing an audio signal that is indicative of the current strength of the detected beacon signal, or

playing an audio guidance regarding the direction of the beacon.

9. A tag for locating assets, the tag is for being borne by and occasionally moving with a user within a site that is divided into a plurality of zones, the tag comprising:

a short-range signal receiver;

a network communication device; and

a processor controlling the short-range signal receiver and the network communication device, the processor is programmed to;

receive a first short-range signal from a location beacon associated with a current zone of the plurality of zones,

receive a second short-range signal from an asset beacon attached to an asset,

retrieve from the second short-range signal an identification of at least one of the asset beacon or the asset,

wirelessly report the current zone to a recipient, and

wirelessly report the identification to the recipient.

10. The tag of claim 9, wherein the processor is further programmed to check availability of a network connection, and wherein at least one of the report the current zone or the report the identification is postponed until the check is positive.

11. The tag of claim 9, wherein the report the current zone and the report the identification are included by the processor within a single locating message.

12. The tag of claim 9, wherein the report the current zone is automatically made following the receive a first short-range signal from a location beacon, and the report the identification is automatically made following the receive a second short-range signal from an asset beacon.

13. The tag of claim 9, wherein the user is a staff member and:

the tag is a staff tag that further comprises a user interface for directing the staff member toward target assets; and

the processor is further programmed to;

receive a target asset identifier and a target zone associated with a target asset,

present to the staff member a description of the target asset, and

present to the staff member directions for reaching the target zone.

14. The tag of claim 13, wherein the staff member is designated to relocate the target asset, the processor is further programmed to cooperate with the short-range signal receiver and the network communication device to:

receive a relocation assignment identifying a target location for the target asset;

detect short-range beacon signals transmitted by a beacon of the target asset;

learn from the beacon signals that the staff tag and the beacon have reached close proximity;

measure the duration of the close proximity;

check whether the staff tag has moved while the close proximity has been maintained; and

based on the results of the measure and the check;

locate the target asset at the target location.

15. The tag of claim 13, wherein the processor is further programmed to cooperate with the short-range signal receiver to:

seek beacon signals that match a beacon identifier of a beacon attached to the target asset; and

upon detecting a beacon signal that matches the beacon identifier;

produce a series of human-comprehensible homing directions for approaching the target asset.

16. The tag of claim 15, wherein:

the directions for reaching the target zone include at least one of;

a name of the target zone, or

instructions for reaching the target zone;

the step of present directions includes at least one of;

display text instructions,

display graphical guidance, or

play audio instructions; and

the step of produce a series of homing directions includes at least one of;

display a textual representation of a current strength of the detected beacon signal,

display a textual guidance regarding the direction of the beacon,

display a graphical representation of a current strength of the detected beacon signal,

display a graphical guidance regarding the direction of the beacon,

play an audio signal that is indicative of the current strength of the detected beacon signal, or

play an audio guidance regarding the direction of the beacon.