Real-time tracking of passive identification tags

A method for tracking location of passive identification tags, the method comprising:

• assigning, with a monitoring device, at least one passive identification tag to an active identification tag, the active identification having a power source and an antenna;
• storing, with the monitoring device in a computer memory, associations between the active identification tag and the at least one passive identification tags assigned to the active identification tag;
• receiving, with the monitoring device, one or more signals indicative of location of the active identification tag;
• tracking, with the monitoring device based on received one or more signals, location of the active identification tag as the active identification tag moves in an active tracking area;
• tracking, with the monitoring device, location of the at least one passive identification tags, assigned to the active identification tag, based on i) the tracked location of the active identification tag and ii) the association between the active identification tag and the assigned passive identification tag;
• associating, at the monitoring device, the at least one passive identifier tag with an asset and
• associating, at the monitoring device, the active identifier tag with an issuable asset, the issuable asset comprising one or more of i) a person handling the asset and ii) a container for carrying the asset,
• wherein associating the at least one passive identifier tag with the asset comprises associating the passive identification tag with an identifier of a tool to which the passive identification tag is attached,
• wherein associating the active identifier tag with the issuable asset comprises associating the active identification tag with an identifier of the issuable asset.

A system, comprising

• a database for storing identification data, and
• a monitoring device coupled to the database, the monitoring device comprising one or more integrated circuits configured to:
• assign at least one passive identification tag to an active identification tag, the active identification tag having a power source and an antenna;
• store, in the database, associations between the active identification tag and the at least one passive identification tags assigned to the active identification tag;
• receive one or more signals indicative of location of the active identification tag;
• track, based on received one or more signals, location of the active identification tag as the active identification tag moves in a tracking area;
• and
• track location of the at least one passive identification tags, assigned to the active identification tag, based on i) the tracked location of the active identification tag and ii) the association between the active identification tag and the assigned passive identification tag,
• wherein the one or more integrated circuits configured to assign the at least one passive identification tag to the active identification tag are further configured to;
• assign the passive identification tag to the active identification tag in response to detecting that the active identification tag is in proximity to the passive identification tag;
• after assigning the passive identification tag to the active identification tag, determine that the passive identification tag is present in a prescribed area associated with the passive identification tag, and
• in response to determining that the passive identification tag is present in the prescribed area, disassociate the passive identification tag from the active identification tag.

A tangible, non-transitory computer readable medium, or media, storing machine readable instructions that, when executed by one or more processors, cause the one or more processors to:

• assign at least one passive identification tag to an active identification tag, the active identification tag having a power source and an antenna,
• store, in a memory, associations between the active identification tag and the at least one passive identification tags assigned to the active identification tag,
• process one or more signals indicative of a location of the active identification tag, and
• track, based on processing the one or more signals, location of the active identification tag as the active identification tag moves in an active tracking area;
• and
• track location of the at least one passive identification tags, assigned to the active identification tag, based on i) the tracked location of the active identification tag and ii) the association between the active identification tag and the assigned passive identification tag,
• wherein the machine readable instructions that, when executed by one or more processors, cause the one or more processors to assign the at least one passive identification tag comprises:
• assigning the passive identification tag to the active identification tag in response detecting that the active identification tag is in proximity to the passive identification tag;
• after assigning the passive identification tag to the active identification tag, determine that the passive identification tag is present in the prescribed area, and
• in response to determining that the a least one passive identification tag is present in the prescribed area, disassociate the passive identification tag from the active identification tag.