US-12626087-B2 - Radio frequency identification tag assembly, and identifiable object to which radio frequency identification tag assembly is attached

US12626087B2US 12626087 B2US12626087 B2US 12626087B2US-12626087-B2

Abstract

A radio frequency identification tag component includes a metal plate with an upper surface and a lower surface; a radiation element comprising a tag housing, the tag housing is arranged along a side of the upper surface of the metal plate, the tag housing contain therein an IC chip, an antenna and a circuit board electrically connecting the IC chip with the antenna, wherein, the antenna is made of metal, and the antenna has a first segment and a second segment parallel to the upper surface of the metal plate, there is a first spacing between the first segment and the upper surface of the metal plate, and there is a second spacing between the first segment and the second segment, and the upper surface of the metal plate is at an angle to the plane in which the antenna is located.

Inventors

Youngdo KIM
Xiaomeng Ma

Assignees

SHUYOU (SHANGHAI) TECHNOLOGY CO., LTD.

Dates

Publication Date: 20260512
Application Date: 20240930

Claims (19)

1 . A radio frequency identification tag component, wherein the radio frequency identification tag component comprises: a metal plate with an upper surface and a lower surface; a radiation element comprising a tag housing, the tag housing is arranged along a side of the upper surface of the metal plate, the tag housing contain therein an IC chip, an antenna and a circuit board electrically connecting the IC chip with the antenna, wherein, the antenna is made of metal, and the antenna has a first segment and a second segment parallel to the upper surface of the metal plate, there is a first spacing between the first segment and the upper surface of the metal plate, and there is a second spacing between the first segment and the second segment, and the upper surface of the metal plate is at an angle to the plane in which the antenna is located.
2 . The radio frequency identification tag component of claim 1 , wherein the IC chip operates in the UHF band.
3 . The radio frequency identification tag component of claim 1 , wherein one end of the first segment of the antenna is connected to one end of the second segment via a conductor.
4 . The radio frequency identification tag component of claim 3 , wherein the conductor is a bent portion between the first segment and the second segment of the antenna, and the first segment, the second segment and the bent portion integrally form the antenna.
5 . The radio frequency identification tag component of claim 3 , wherein the conductor is a wire arranged within the housing separate from the antenna.
6 . The radio frequency identification tag component of claim 3 , wherein the housing has mounting grooves therein to embed the antenna and the circuit board.
7 . The radio frequency identification tag component of claim 6 , wherein the mounting grooves comprise: a plurality of grooves for embedding the antenna, wherein the plurality of grooves include a plurality of horizontal grooves and a plurality of vertical grooves, the plurality of horizontal grooves include a first horizontal groove and a second horizontal groove, the first horizontal groove is configured to embed the first segment of the antenna, the second horizontal groove is configured to embed the second segment of the antenna, and the vertical groove is configured to embed the conductor; and a plurality of accommodation spaces, each of the plurality of accommodation spaces is used to accommodate the circuit board.
8 . The radio frequency identification tag component of claim 7 , wherein each of the plurality of horizontal grooves intersects at least one of the plurality of accommodation spaces, the plurality of horizontal grooves are parallel to the upper surface of the metal plate, and the plurality of horizontal grooves are at different distances from the upper surface of the metal plate, and the plurality of accommodation spaces are separated from the vertical grooves by a plurality of distances.
9 . The radio frequency identification tag component of claim 7 , wherein the first segment of the antenna extends to a third horizontal groove of the plurality of horizontal grooves, and/or the second segment of the antenna extends to a fourth horizontal groove of the plurality of horizontal grooves.
10 . The radio frequency identification tag component of claim 9 , wherein the first horizontal groove is configured to be able to embed the first segment of the antenna of different lengths, and the second horizontal groove is configured to be able to embed the second segment of the antenna of different lengths.
11 . The radio frequency identification tag component of claim 1 , wherein the plane in which the antenna is located is perpendicular to the upper surface of the metal plate.
12 . The radio frequency identification tag component of claim 1 , wherein the metal plate serves as a ground plate of the radio frequency identification tag component.
13 . The radio frequency identification tag component of claim 1 , wherein the radio frequency identification tag component is disposed by attaching a lower surface of the metal plate to an object to be identified.
14 . The radio frequency identification tag component of claim 1 , wherein the tag housing is fixed to the metal plate through a locating mechanism such that the lower surface of the tag housing remains horizontal relative to the upper surface of the metal plate.
15 . The radio frequency identification tag component of claim 14 , wherein the locating mechanism includes a threaded piece that fixes the tag housing to the metal plate and a lattice-shaped fastener located on the upper surface of the metal plate.
16 . The radio frequency identification tag component of claim 1 , wherein the metal plate is embossed, stamped, laser processed or printed with visual identifiers.
17 . The radio frequency identification tag component of claim 1 , wherein the direction of the peak radiation gain of the radio frequency identification tag component is tilted from a direction perpendicular to the metal plate.
18 . An identifiable object to which the radio frequency identification tag component of claim 1 is attached.
19 . The identifiable object of claim 18 , wherein the identifiable object includes equipment properties and shelves.

Description

CROSS-REFERENCE TO RELATED APPLICATIONS This application is a continuation of International Patent Application No. PCT/CN2022/102805 filed Jun. 30, 2022, the disclosure of which is incorporated herein by reference in its entirety and for all purposes. FIELD OF THE INVENTION The present invention relates to the field of radio frequency identification, more specifically, to a tag component for radio frequency identification and identifiable objects attached with radio frequency identification (RFID) tag components. BACKGROUND In recent years, specialized RFID tags in various forms and special packages have been widely used in various technical fields for the purpose of moving, mounting, managing, maintaining, etc. indoor and outdoor properties and equipments. According to application environment and RFID tag attachment conditions, various RFID tags are used according to their size, attachment manner, special material selection, required identification performance, etc. In particular, RFID tags in the UHF band have the characteristics of utilizing backscattering, not only the reflection, attenuation, absorption, and diffraction in the surrounding radio wave environment, but also the material and location of the attached object and the tagging conditions will greatly affect the performance of the tags. Usually the polarization inconsistency caused by the division as circular polarization and linear polarization and the sharp drop in recognition rate caused by the height difference between the reader antenna and the tag mounting height are the main factors that determine the completion of the RFID system. The peak radiation gain and readable identification distance of a general RFID tag are formed in a direction at a right angle to/perpendicular to the surface of the attached object. Due to the characteristics of the RFID application environment, when the tag attachment location is inconsistent with the height of the reader antenna or the tag is identified in a direction shifted left and right from the tag attachment location, the radar cross section (RCS) cross-sectional area is reduced, causing the tag identification distance to decrease sharply. In actual multi-layer shelf object and property management, external facility property management with relatively high tag attachment heights, and object identification environments in automated warehouses, such problem of reduced tag identification distance is considered as a dangerous factor reducing the reliability of the RFID system and affecting the stability of the integrated system. Therefore, as the application scope of utilizing RFID technology expands in various industrial fields, there is a need for specialized RFID tag technology that prevents the performance of tags from decreasing with the varying heights of tag attachment locations and that can take into account the on-site work process. SUMMARY The present invention aims to overcome the above and/or other problems in the prior art. Through the radio frequency identification tag component provided by the present invention, even when identifying by the user's RFID reader at a location that is higher or lower or deflected left/right relative to the location of the RFID tag antenna, it may be identified easily by changing the attaching direction of the same tag, thereby helping to solve the problem of tag performance deviation or low tag performance incurring with the varying height of the tag setting location. According to a first aspect of the present invention, a radio frequency identification tag component is provided, wherein the radio frequency identification tag component includes: a metal plate with an upper surface and a lower surface; a radiation element comprising a tag housing, the tag housing is arranged along a side of the upper surface of the metal plate, the tag housing contain therein an IC chip, an antenna and a circuit board electrically connecting the IC chip with the antenna, wherein, the antenna is made of metal, and the antenna has a first segment and a second segment parallel to the upper surface of the metal plate, there is a first spacing between the first segment and the upper surface of the metal plate, and there is a second spacing between the first segment and the second segment, and the upper surface of the metal plate is at an angle to the plane in which the antenna is located. Preferably, the IC chip operates in the UHF band. Preferably, one end of the first segment of the antenna is connected to one end of the second segment via a conductor. Preferably, the conductor is a bent portion between the first segment and the second segment of the antenna, and the first segment, the second segment and the bent portion integrally form the antenna. Preferably, the conductor is a wire arranged within the housing separate from the antenna. Preferably, the plane in which the antenna is located is perpendicular to the upper surface of the metal plate. Preferably, the metal plate serves