Tine-mounted antenna for an RFID
First Claim
Patent Images
1. An antenna system for interrogating radio frequency identification (RFID) tags with backscatter coupling techniques, said antenna system suitable for mounting on a tine of a forklift, comprising:
- a support structure adapted for mounting on said tine, said support structure including a mounting section and a component section each extending along at least a portion of said support structure, said mounting section configured to secure said support structure to said tine and said component section including at least one cavity wherein said cavity has a first opening;
a first antenna mounted in said cavity, said antenna comprising a first radiating element and a first power distribution network;
a first cover for said radiating element, said first cover mounted to and essentially flush with the component section so as to permit said radiating element to project a first radio frequency signal through said first opening.
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Abstract
The present invention provides a tine-mounted antenna for reading RFID tags in a warehouse environment using RFID technology operating at ultra-high frequencies (UHF) or microwave frequencies and backscatter coupling techniques. At least one ruggedized antenna is mounted on the tine (or other base-level platform) of a lift truck (e.g., a forklift). The antenna can be configured to read RFID tags on pallets that are loaded on the lift truck and communicate the tag information to a warehouse management system.
62 Citations
34 Claims
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1. An antenna system for interrogating radio frequency identification (RFID) tags with backscatter coupling techniques, said antenna system suitable for mounting on a tine of a forklift, comprising:
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a support structure adapted for mounting on said tine, said support structure including a mounting section and a component section each extending along at least a portion of said support structure, said mounting section configured to secure said support structure to said tine and said component section including at least one cavity wherein said cavity has a first opening; a first antenna mounted in said cavity, said antenna comprising a first radiating element and a first power distribution network; a first cover for said radiating element, said first cover mounted to and essentially flush with the component section so as to permit said radiating element to project a first radio frequency signal through said first opening. - View Dependent Claims (2, 3, 4, 5, 6, 7, 8, 9, 10, 11, 12, 13, 14, 15, 16, 17, 18, 19, 20)
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21. A method of collecting inventory tracking data in a material handling environment using an integrated forklift tine antenna, said method comprising the steps of:
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providing inventory RFID tags on a pallet and/or inventory on the pallet, wherein the inventory RFID tags represent inventory contents; mounting an antenna on forklift tine using a support structure abapted for mounting on said tine, said support structure including a mounting section and a component section each extending along at least a portion of said support struction, said mounting section configured to secure said support structure to said tine and said component section including at least one cavity in which to mount the antenna; transmitting a radio frequency signal from the antenna mounted on the forklift tine; and reading information from the inventory RFID tags using backscatter coupling techniques. - View Dependent Claims (22, 23, 24, 25, 26, 27)
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28. A tine for a forklift, comprising:
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a single piece of rigid material having a vertical portion for mounting to a carriage of a forklift, a horizontal portion for engaging a load, and an elbow portion connecting said vertical portion to said horizontal portion, said horizontal portion including top surface, a bottom surface, a first side surface and a second side surface, wherein said first side surface includes a notch; an antenna housing mounted in said notch, said housing comprising an opening and a radiating element of conducting material, said housing having a uniform voltage at low frequency, wherein said housing is mounted essentially flush with two of said top, bottom, and first side surfaces with said opening exposed along one of said top, bottom, and first side surfaces so as to project a radio frequency signal from said opening. - View Dependent Claims (29, 30, 31, 32, 33, 34)
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Specification