CA2873221C - Mounting an rfid tag on a support formed of a material which blocks or attenuates rf signals - Google Patents
Mounting an rfid tag on a support formed of a material which blocks or attenuates rf signals Download PDFInfo
- Publication number
- CA2873221C CA2873221C CA2873221A CA2873221A CA2873221C CA 2873221 C CA2873221 C CA 2873221C CA 2873221 A CA2873221 A CA 2873221A CA 2873221 A CA2873221 A CA 2873221A CA 2873221 C CA2873221 C CA 2873221C
- Authority
- CA
- Canada
- Prior art keywords
- upper edge
- base
- tag
- box
- open upper
- Prior art date
- Legal status (The legal status is an assumption and is not a legal conclusion. Google has not performed a legal analysis and makes no representation as to the accuracy of the status listed.)
- Active
Links
- 239000000463 material Substances 0.000 title claims abstract description 28
- 230000000903 blocking effect Effects 0.000 claims description 6
- 239000000853 adhesive Substances 0.000 claims description 4
- 230000001070 adhesive effect Effects 0.000 claims description 4
- 239000004820 Pressure-sensitive adhesive Substances 0.000 claims description 3
- 239000010410 layer Substances 0.000 description 3
- 239000002184 metal Substances 0.000 description 3
- 229910052751 metal Inorganic materials 0.000 description 3
- 229910000831 Steel Inorganic materials 0.000 description 2
- 239000012790 adhesive layer Substances 0.000 description 2
- 238000000034 method Methods 0.000 description 2
- 239000010959 steel Substances 0.000 description 2
- 239000003292 glue Substances 0.000 description 1
- 239000007788 liquid Substances 0.000 description 1
- 150000002739 metals Chemical class 0.000 description 1
- 230000003287 optical effect Effects 0.000 description 1
- 239000002699 waste material Substances 0.000 description 1
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- Details Of Rigid Or Semi-Rigid Containers (AREA)
Abstract
An RFID tag for attachment to a supporting material comprising a generally flat strip is adhesively mounted inside the base of a rectangular container having side walls and end walls extending generally to an open upper edge of the box where the open upper edge is arranged to be fastened to the material so that the tag thus is supported by the base at a position spaced from the material by a distance defined by a spacing of the base from the upper edge.
Description
MOUNTING AN RFID TAG ON A SUPPORT FORMED OF A MATERIAL WHICH
BLOCKS OR ATTENUATES RF SIGNALS
This invention relates to an arrangement for mounting an RFID tag on a support formed of a material which blocks or attenuates RF signals.
BACKGROUND OF THE INVENTION
The present invention generally relates to the tracking of containers or other similar objects, and more particularly to apparatus and techniques for attaching a radio frequency identification (RFID) tag to an article where the support on which the tag is mounted is formed of a material which blocks or attenuates RF
signals.
There is a widespread need to track and identify a variety of items in the normal course of business operations. For example, in a company's supply chain, the capability to readily identify and track items can decrease the time to market, increase efficiency, decrease costs, and provide a host of other advantages.
In addition in waste material collection, tracking the location of containers using RFID tags can significantly increase the efficiency of the system and can provide an input to a control system which monitors and tracks the containers which are unloaded.
One solution to such a need is an RFID tag tracking system in which an RF1D tag is attached to each of the items to be tracked. A typical passive RFID
tag tracking system comprises the RFID tags and an interrogator, also known as a reader. The RFID tag includes an antenna and a microchip, which may store data such as a serial number or an item identification number. To read the data stored on
BLOCKS OR ATTENUATES RF SIGNALS
This invention relates to an arrangement for mounting an RFID tag on a support formed of a material which blocks or attenuates RF signals.
BACKGROUND OF THE INVENTION
The present invention generally relates to the tracking of containers or other similar objects, and more particularly to apparatus and techniques for attaching a radio frequency identification (RFID) tag to an article where the support on which the tag is mounted is formed of a material which blocks or attenuates RF
signals.
There is a widespread need to track and identify a variety of items in the normal course of business operations. For example, in a company's supply chain, the capability to readily identify and track items can decrease the time to market, increase efficiency, decrease costs, and provide a host of other advantages.
In addition in waste material collection, tracking the location of containers using RFID tags can significantly increase the efficiency of the system and can provide an input to a control system which monitors and tracks the containers which are unloaded.
One solution to such a need is an RFID tag tracking system in which an RF1D tag is attached to each of the items to be tracked. A typical passive RFID
tag tracking system comprises the RFID tags and an interrogator, also known as a reader. The RFID tag includes an antenna and a microchip, which may store data such as a serial number or an item identification number. To read the data stored on
2 the microchip, the interrogator transmits electromagnetic radio frequency (RF) waves to the RFID tag. The antenna of the RFID tag receives these broadcast electromagnetic RF waves and the small electrical current induced in the antenna is used to power the microchip. The RFID tag is powered by the received RF waves allowing it to send data, such as the serial number, to the interrogator through RF
waves.
Unlike a bar code read by an optical scanner, an RFD tag tracking system does not depend upon an unobstructed line of sight from the reader to the item to be read since RF signals pass through many types of materials.
However, RF signals can be blocked or interfered with by some types of materials, such as metals and liquids. These materials, which may be used to construct the article to be tracked, may prevent reliable communication between the interrogator and the RFID
tag attached to a side of the package by blocking or substantially attenuating.
Therefore, it would be advantageous to provide systems and methods for attaching an RFID tag to an article which allows the RFID tag to be read when the article contains or is manufactured from an RF blocking, or attenuating material.
That is, standard UHF RFID tags cannot be read when mounted directly on metal or any other dense material.
Some manufacturers have invented multi layers RFD tags that include a reflective layer separated from the antenna layer by a dielectric with a known impedance. These tags have the disadvantage of being expensive.
waves.
Unlike a bar code read by an optical scanner, an RFD tag tracking system does not depend upon an unobstructed line of sight from the reader to the item to be read since RF signals pass through many types of materials.
However, RF signals can be blocked or interfered with by some types of materials, such as metals and liquids. These materials, which may be used to construct the article to be tracked, may prevent reliable communication between the interrogator and the RFID
tag attached to a side of the package by blocking or substantially attenuating.
Therefore, it would be advantageous to provide systems and methods for attaching an RFID tag to an article which allows the RFID tag to be read when the article contains or is manufactured from an RF blocking, or attenuating material.
That is, standard UHF RFID tags cannot be read when mounted directly on metal or any other dense material.
Some manufacturers have invented multi layers RFD tags that include a reflective layer separated from the antenna layer by a dielectric with a known impedance. These tags have the disadvantage of being expensive.
3 SUMMARY OF THE INVENTION
According to the invention there is provided an RFID tag apparatus for mounting on a material which is blocking or attenuating to RF signals comprising:
an RFID tag in the form of a generally flat strip;
a container box for containing the tag;
the container box having a base, side walls and end walls extending generally at a right angle to the base to an open upper edge of the box;
the base being dimensioned to receive the flat strip forming the tag lying flat on the base;
an adhesive material bonding the tag to the base;
the open upper edge being arranged to be fastened to the material;
the tag thus being supported by the base at a position spaced from the material by a distance defined by a spacing of the base from the upper edge.
Preferably the box is open at the open upper edge so that the open upper edge is defined by a top edge of the side walls and end walls.
Preferably the RFID tag is affixed to the base by a wet inlay.
Preferably the RFID tag is affixed to the base by pressure sensitive adhesive.
Preferably the tag is covered with calking to make the tag waterproof.
Preferably the open upper edge includes at least a pair of opposed wings for fastening to the material.
According to the invention there is provided an RFID tag apparatus for mounting on a material which is blocking or attenuating to RF signals comprising:
an RFID tag in the form of a generally flat strip;
a container box for containing the tag;
the container box having a base, side walls and end walls extending generally at a right angle to the base to an open upper edge of the box;
the base being dimensioned to receive the flat strip forming the tag lying flat on the base;
an adhesive material bonding the tag to the base;
the open upper edge being arranged to be fastened to the material;
the tag thus being supported by the base at a position spaced from the material by a distance defined by a spacing of the base from the upper edge.
Preferably the box is open at the open upper edge so that the open upper edge is defined by a top edge of the side walls and end walls.
Preferably the RFID tag is affixed to the base by a wet inlay.
Preferably the RFID tag is affixed to the base by pressure sensitive adhesive.
Preferably the tag is covered with calking to make the tag waterproof.
Preferably the open upper edge includes at least a pair of opposed wings for fastening to the material.
4 Preferably the opposed wings extend outwardly from the open upper edge.
Preferably each wing has a hole that will be used to install the tag on the steel (or dense) surface by using rivets or screws.
Preferably the box is arranged to be installed using adhesive between the upper edge and the material.
Preferably the box is arranged to be installed using double face tape between the upper edge and the material.
Preferably the box includes an opening allowing escape of moisture.
Preferably the opening is defined at the upper edge.
Preferably the opening is defined by a recess at the upper edge of at least one of the side and end walls.
Preferably both side walls are recessed so as to define a slot along the upper edge of each side wall.
Preferably the article includes a wall farmed of a material which is blocking or attenuating to RF signals and an apparatus according to any preceding claim where the box is mounted on the wall.
Thus the present invention provides a tag that works very well on metal or other dense surfaces. This tag is made of standard pressure sensitive inlays (called wet inlays) mounted in a special plastic box. These inlays as well as the plastic boxes are inexpensive. This invention is based on the fact that the reading distance increase logarithmically with the distance separating the inlay from the dense surface. By creating a gap of 1 or 2 centimeters, the reading distance goes from Om to 5m.
BRIEF DESCRIPTION OF THE DRAWINGS
One embodiment of the invention will now be described in conjunction
Preferably each wing has a hole that will be used to install the tag on the steel (or dense) surface by using rivets or screws.
Preferably the box is arranged to be installed using adhesive between the upper edge and the material.
Preferably the box is arranged to be installed using double face tape between the upper edge and the material.
Preferably the box includes an opening allowing escape of moisture.
Preferably the opening is defined at the upper edge.
Preferably the opening is defined by a recess at the upper edge of at least one of the side and end walls.
Preferably both side walls are recessed so as to define a slot along the upper edge of each side wall.
Preferably the article includes a wall farmed of a material which is blocking or attenuating to RF signals and an apparatus according to any preceding claim where the box is mounted on the wall.
Thus the present invention provides a tag that works very well on metal or other dense surfaces. This tag is made of standard pressure sensitive inlays (called wet inlays) mounted in a special plastic box. These inlays as well as the plastic boxes are inexpensive. This invention is based on the fact that the reading distance increase logarithmically with the distance separating the inlay from the dense surface. By creating a gap of 1 or 2 centimeters, the reading distance goes from Om to 5m.
BRIEF DESCRIPTION OF THE DRAWINGS
One embodiment of the invention will now be described in conjunction
5 with the accompanying drawings in which:
Figure 1 is a cross-sectional view through a door, door lock and security device according to the present invention.
Figure 2 is an exploded view of the components of Figure 1 In the drawings like characters of reference indicate corresponding parts in the different figures.
DETAILED DESCRIPTION
As shown in the Figures, a standard UHF RFID wet inlay or pressure sensitive (label type) RFID tag 10 is attached by adhesive layer 11 such as a weet inlay or pressure sensitive adhesive on the bottom face of a box 12. The box has one end 13 open which is opposed to the surface or base 14 where the inlay including the tag and adhesive layer is applied. Some caulking 15 partly or wholly filling the box can be used to make the tag waterproof. The box has a wing 16 on each side of the open end 13 attached to the top edge of one of the end walls 17.
Each wing 16 has a hole 16A that will be used to install the tag 10 on the steel (or dense) surface 20 by using rivets or screws. The box can also be installed using some type of glue or double face tape applied on the top edge of the open end at the to edge of the end walls 17 and side walls 18.
Figure 1 is a cross-sectional view through a door, door lock and security device according to the present invention.
Figure 2 is an exploded view of the components of Figure 1 In the drawings like characters of reference indicate corresponding parts in the different figures.
DETAILED DESCRIPTION
As shown in the Figures, a standard UHF RFID wet inlay or pressure sensitive (label type) RFID tag 10 is attached by adhesive layer 11 such as a weet inlay or pressure sensitive adhesive on the bottom face of a box 12. The box has one end 13 open which is opposed to the surface or base 14 where the inlay including the tag and adhesive layer is applied. Some caulking 15 partly or wholly filling the box can be used to make the tag waterproof. The box has a wing 16 on each side of the open end 13 attached to the top edge of one of the end walls 17.
Each wing 16 has a hole 16A that will be used to install the tag 10 on the steel (or dense) surface 20 by using rivets or screws. The box can also be installed using some type of glue or double face tape applied on the top edge of the open end at the to edge of the end walls 17 and side walls 18.
6 The box includes an opening allowing escape of moisture where the opening is defined at the upper edge and the opening is defined by a recess 19 at or along the upper edge of at least one and preferably both of the side walls 18 so that the moisture can depart the box when the box is in different orientations such as with the base at the top or the base vertical.
Claims (14)
1. An RFID tag apparatus for mounting on a material which is blocking or attenuating to RF signals comprising:
an RFID tag in the form of a strip;
a container box for containing the tag;
the container box having a base, side walls and end walls upstanding from the base to an open upper edge of the box;
the base being dimensioned to receive the strip forming the tag lying on the base;
an adhesive material bonding the tag to the base;
the open upper edge being arranged to be fastened to the material;
the tag thus being supported by the base at a position spaced from the material by a distance defined by a spacing of the base from the upper edge.
an RFID tag in the form of a strip;
a container box for containing the tag;
the container box having a base, side walls and end walls upstanding from the base to an open upper edge of the box;
the base being dimensioned to receive the strip forming the tag lying on the base;
an adhesive material bonding the tag to the base;
the open upper edge being arranged to be fastened to the material;
the tag thus being supported by the base at a position spaced from the material by a distance defined by a spacing of the base from the upper edge.
2. The apparatus according to claim 1 wherein the box is open at the open upper edge so that the open upper edge is defined by a top edge of the side walls and end walls.
3. The apparatus according to claim 1 or 2 wherein the RFID tag is affixed to the base by a wet inlay.
4. The apparatus according to any one of claims 1 to 3 wherein the RFID tag is affixed to the base by pressure sensitive adhesive.
5. The apparatus according to any one of claims 1 to 4 wherein the tag is covered with calking to make the tag waterproof.
Date Recue/Date Received 2021-02-19
Date Recue/Date Received 2021-02-19
6. The apparatus according to any one of claims 1 to 5 wherein the open upper edge includes at least a pair of opposed wings for fastening to the material.
7. The apparatus according to claim 6 wherein the opposed wings extend outwardly from the open upper edge.
8. The apparatus according to any one of claims 1 to 7 wherein the box is arranged to be installed using adhesive between the upper edge and the material.
9. The apparatus according to any one of claims 1 to 7 wherein the box is arranged to be installed using double face tape between the upper edge and the material.
10. The apparatus according to any one of claims 1 to 9 wherein the box includes an opening allowing escape of moisture.
11. The apparatus according to claim 10 wherein the opening is defined at the open upper edge.
12. The apparatus according to claim 10 wherein the opening is defined by a recess at the open upper edge of at least one of the side and end walls.
13. The apparatus according to claim 12 wherein both side walls are recessed so as to define a slot along the open upper edge at each side wall.
14. An article carrying an RFID tag wherein the article includes a wall formed of a material which is blocking or attenuating to RF signals and an apparatus according to any one of claims 1 to 13 where the box is mounted on the wall.
Date Recue/Date Received 2021-02-19
Date Recue/Date Received 2021-02-19
Applications Claiming Priority (2)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| US201461933569P | 2014-01-30 | 2014-01-30 | |
| US61933569 | 2014-01-30 |
Publications (2)
| Publication Number | Publication Date |
|---|---|
| CA2873221A1 CA2873221A1 (en) | 2015-07-30 |
| CA2873221C true CA2873221C (en) | 2021-11-09 |
Family
ID=53758569
Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| CA2873221A Active CA2873221C (en) | 2014-01-30 | 2014-12-02 | Mounting an rfid tag on a support formed of a material which blocks or attenuates rf signals |
Country Status (1)
| Country | Link |
|---|---|
| CA (1) | CA2873221C (en) |
-
2014
- 2014-12-02 CA CA2873221A patent/CA2873221C/en active Active
Also Published As
| Publication number | Publication date |
|---|---|
| CA2873221A1 (en) | 2015-07-30 |
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Legal Events
| Date | Code | Title | Description |
|---|---|---|---|
| EEER | Examination request |
Effective date: 20191202 |