KR20140125919A - RF Tag reader using RF signal to power supply source - Google Patents
RF Tag reader using RF signal to power supply source Download PDFInfo
- Publication number
- KR20140125919A KR20140125919A KR1020130043071A KR20130043071A KR20140125919A KR 20140125919 A KR20140125919 A KR 20140125919A KR 1020130043071 A KR1020130043071 A KR 1020130043071A KR 20130043071 A KR20130043071 A KR 20130043071A KR 20140125919 A KR20140125919 A KR 20140125919A
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- South Korea
- Prior art keywords
- antenna
- power supply
- signal
- unit
- rfid tag
- Prior art date
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- G—PHYSICS
- G06—COMPUTING; CALCULATING OR COUNTING
- G06K—GRAPHICAL DATA READING; PRESENTATION OF DATA; RECORD CARRIERS; HANDLING RECORD CARRIERS
- G06K7/00—Methods or arrangements for sensing record carriers, e.g. for reading patterns
- G06K7/0008—General problems related to the reading of electronic memory record carriers, independent of its reading method, e.g. power transfer
-
- G—PHYSICS
- G06—COMPUTING; CALCULATING OR COUNTING
- G06K—GRAPHICAL DATA READING; PRESENTATION OF DATA; RECORD CARRIERS; HANDLING RECORD CARRIERS
- G06K7/00—Methods or arrangements for sensing record carriers, e.g. for reading patterns
- G06K7/10—Methods or arrangements for sensing record carriers, e.g. for reading patterns by electromagnetic radiation, e.g. optical sensing; by corpuscular radiation
- G06K7/10009—Methods or arrangements for sensing record carriers, e.g. for reading patterns by electromagnetic radiation, e.g. optical sensing; by corpuscular radiation sensing by radiation using wavelengths larger than 0.1 mm, e.g. radio-waves or microwaves
- G06K7/10316—Methods or arrangements for sensing record carriers, e.g. for reading patterns by electromagnetic radiation, e.g. optical sensing; by corpuscular radiation sensing by radiation using wavelengths larger than 0.1 mm, e.g. radio-waves or microwaves using at least one antenna particularly designed for interrogating the wireless record carriers
- G06K7/10356—Methods or arrangements for sensing record carriers, e.g. for reading patterns by electromagnetic radiation, e.g. optical sensing; by corpuscular radiation sensing by radiation using wavelengths larger than 0.1 mm, e.g. radio-waves or microwaves using at least one antenna particularly designed for interrogating the wireless record carriers using a plurality of antennas, e.g. configurations including means to resolve interference between the plurality of antennas
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- Engineering & Computer Science (AREA)
- Physics & Mathematics (AREA)
- Health & Medical Sciences (AREA)
- Toxicology (AREA)
- Artificial Intelligence (AREA)
- Computer Vision & Pattern Recognition (AREA)
- General Physics & Mathematics (AREA)
- Theoretical Computer Science (AREA)
- Computer Networks & Wireless Communication (AREA)
- Electromagnetism (AREA)
- General Health & Medical Sciences (AREA)
- Near-Field Transmission Systems (AREA)
Abstract
An RFID tag recognition apparatus using an RF signal as a power supply source is disclosed. An RFID tag recognition apparatus according to the present invention includes an antenna unit having a plurality of antennas for receiving tag information from an RFID tag, and a controller for supplying power to the antenna unit using RF signals and reading tag information received by the plurality of antennas Includes a recognition unit. This makes it possible to improve the production efficiency by eliminating the need for an additional power supply device or a transmission cable for the antenna.
Description
Field of the Invention [0002] The present invention relates to a radio wave identification technology, and more particularly, to a RFID tag recognition technology.
The RFID tag recognizing device is a device for reading and recognizing an RFID tag through a reader wirelessly at a specific distance using radio waves, and the RFID tag is formed by an antenna and a direct circuit. The integrated circuit stores data and transmits data through the antenna to read it wirelessly through a reader. Such an RFID tag can be made relatively inexpensive and can be attached to various articles and used for management of a target article.
The RFID tag recognition apparatus is provided with an antenna for transmitting and receiving radio waves or electromagnetic waves with the RFID tag. Here, the intensity of the radio wave received by the RFID tag from the RFID tag recognizing device differs depending on the position and direction of the RFID tag with respect to the RFID tag recognizing device. Therefore, in order to increase the reception sensitivity of the RFID tag without depending on the positional relationship between the RFID tag recognition device and the RFID tag, a plurality of antennas can be provided in the RFID tag recognition device. In this case, since the RFID tag can transmit and receive data to and from the RFID tag recognizing device through any one of the antennas, the quality of communication between the RFID tag and the RFID tag recognizing device is improved as compared with the case of one antenna.
In the case of adding the number of antennas for receiving tag information from the RFID tag, it is necessary to add only a distribution circuit without adding a port of the tag recognition device or adding a tag recognition device. In this case, There is provided an RFID tag recognition apparatus using an RF signal as a power source so that installation is not required.
Also, an RFID tag recognition apparatus using an RF signal as a power source is provided so that an additional power source device or a transmission cable need not be additionally installed in an accessory requiring other power source.
According to an aspect of the present invention, there is provided an RFID tag recognition apparatus including an antenna unit having a plurality of antennas for receiving tag information from an RFID tag, a power supply unit for supplying power to the antenna unit using an RF signal, And a recognition unit for reading information.
The RFID tag recognition apparatus further includes a transmission cable for connecting the antenna unit and the recognition unit, and the power stored in the RF signal is transmitted from the recognition unit to the antenna unit through the transmission cable.
The recognition unit includes a first power supply unit for supplying an RF signal, a first power supply unit for supplying power, and a first power supply circuit for transmitting power supplied through the first power supply unit to an RF signal output from the RF output unit .
At this time, the first power supply circuit is a circuit element connected between the RF output part and the first power supply part and having a high impedance characteristic, and shows an open circuit for the RF signal so that the first power supply part is not affected by the RF signal And the RF signal level can be prevented from being reduced by the first power supply unit.
The recognizing unit may further include a capacitor connected between the connection node to which the first power supply circuit and the RF output unit are connected and the RF output unit to perform DC blocking.
The antenna unit includes an antenna for each region located in each region of the shelf divided into predetermined regions and an antenna distribution circuit for distributing a signal to be transmitted to the antenna for each region by receiving power from the RF signal transmitted from the recognition unit. The antenna distribution circuit may be included in the antenna portion or may be located in the front end of the antenna portion.
According to an embodiment, the antenna distribution circuit includes an RF switch for sequentially activating an antenna for each area, and a control circuit driven by a power source mounted on an RF signal transmitted from the recognition unit to control the RF switch.
The antenna distribution circuit may further include a second power supply unit that receives the power supplied from the RF signal transmitted from the recognition unit, changes the power supply to the control circuit, and supplies the power to the control circuit.
The antenna distribution circuit is a circuit element having a high impedance characteristic which is located at the front end of the control circuit or the second power supply part and shows an open circuit for the RF signal so that the control circuit or the second power supply part is not affected by the RF signal And to prevent the RF signal level from being reduced by the control circuit or the second power supply unit. In addition, the antenna distribution circuit may further include a capacitor positioned in front of the RF switch to perform DC blocking.
According to another embodiment, the antenna unit includes an antenna for each region formed around an attachment to which the RFID tag is attached, and an antenna distribution circuit for distributing a signal to be transmitted to the antenna for each region by receiving power from the RF signal transmitted from the recognition unit do. At this time, the attachment is a winding rod to which a sheet to which the RFID tag is attached is wound, and the antenna for each region can be disposed at a position facing each other with the winding rod therebetween. The antenna section may further include a connection member which connects the antenna for each area to the facility having the winding rod. The antenna distribution circuit may be included in the antenna portion or may be located in the front end of the antenna portion.
At this time, the antenna distribution circuit includes an RF switch for sequentially activating antennas for each area, and a control circuit driven by a power source mounted on the RF signal received from the recognition section to control the RF switch.
The antenna distribution circuit may further include a second power supply unit that receives the power supplied from the RF signal transmitted from the recognition unit, changes the power supply to the control circuit, and supplies the power to the control circuit. Further, the antenna distribution circuit is a circuit element having a high impedance characteristic located at the front end of the control circuit or the second power supply part, and shows an open circuit for the RF signal so that the control circuit or the second power supply part is affected by the RF signal And to prevent the RF signal level from being reduced by the control circuit or the second power supply unit. In addition, the antenna distribution circuit may further include a capacitor positioned in front of the RF switch to perform DC blocking.
On the other hand, the antenna distribution circuit may include a driving unit for changing the direction or position of the antenna for each area, and a control circuit for controlling the driving unit by being driven by a power source mounted on the RF signal transmitted from the recognition unit.
When a plurality of antennas are installed to increase the RFID tag recognition rate, only the distribution circuit is added without adding a port of the tag recognition device or tag recognition device, and the RF signal of the recognizer is used as a power source, No power supply or separate transmission cable is required. Accordingly, the RFID tag can be stably read while improving the production efficiency by reducing the manufacturing cost, the processing time, and the hassle. Furthermore, the number of tag recognizers can be minimized by extending only the antennas necessary for RFID tag recognition.
1 is a configuration diagram of an RFID tag recognition apparatus according to an embodiment of the present invention;
2 is an external view of an antenna unit of an RFID tag recognition apparatus according to an embodiment of the present invention.
3A is an external view of an antenna unit of an RFID tag recognition apparatus according to another embodiment of the present invention,
Fig. 3B is an external view of the winding rod to be recognized by the RFID tag recognizing device,
Fig. 3c is an external view of the antenna unit extending over the facility,
4 is a detailed configuration diagram of an antenna unit according to an embodiment of the present invention,
FIG. 5 is an expanded schematic view of an RFID tag recognition apparatus according to an embodiment of the present invention;
6 is an internal view of a transmission cable according to an embodiment of the present invention;
FIG. 7 is a reference diagram showing a flow of a signal transmitted between a recognition unit and an antenna unit using a transmission cable according to an embodiment of the present invention;
8 is a reference view showing a flow of signals transmitted between a recognition unit and an antenna unit using a transmission cable according to another embodiment of the present invention.
The foregoing and other additional objects will become apparent through the following description of the embodiments. Aspects described in each claim can be combined so as to constitute various inventions independently and mutually coupled as long as they are not technically contradictory. It is to be understood that the following embodiments are illustrative of the various inventions.
Hereinafter, specific examples for carrying out the present invention will be described in detail with reference to the accompanying drawings.
1 is a configuration diagram of an RFID
Referring to FIG. 1, the RFID
The
According to the present invention, the antenna unit (3) is supplied with power from the RF signal output from the recognition unit (2). The
It is a time-consuming and costly task to individually install a power line for each antenna when installing an antenna in a plurality of areas, for example, each area of a shelf. However, according to the present invention, since the
The
2 is an external view of an
Referring to FIG. 2, each antenna of the
In FIG. 2, the antennas are located in the upper part of each area of the shelf, but the positions of the antennas can be variously modified. In addition, although only one antenna is located in each area in FIG. 2, the number of antennas can be varied. For example, the antenna may be located at the top and bottom of each region. At this time, the antenna can be added through the antenna distribution circuit. The tag recognition distance of each antenna can be limited to a close range that does not deviate from a preallocated area. This also eliminates the need for a separate additional power supply or transmission cable to operate the antenna distribution circuitry because of the power to the RF signal.
According to one embodiment, as shown in FIG. 2, a light emitting portion connected to each antenna is located in each region of the shelf. Each of the light emitting units is connected to each antenna in the area of the shelf, and when the recognizing
The light emitting portion may be any light emitting means such as, for example, an LED, a warning light, and the like. The operation principle of the light emitting section will be described. When the recognizing
3A is an external view of the
First, the structure of the
On the other hand, the shape of the antenna positioned around the winding
The structure of the winding
The
FIG. 3C illustrates a configuration in which the
Hereinafter, an RFID tag recognition process using the winding
The number of antennas can be further expanded to solve the above-described problem. It is possible to use a method of switching an antenna using an RF switch without expanding the antenna port of the recognition unit or the recognition unit when the number of antennas is expanded. This method requires a control circuit for controlling the RF switch for switching the RF switch, and a power source for driving the control circuit is required. According to the present invention, the recognition unit supplies the power source to the control circuit using the RF signal, so that the
3A to 3C illustrate the case where the
According to another embodiment, the power source is supplied to the driving means such as the motor by using the RF signal, so that the driving means can change the direction or the position of the antenna by the supplied power source. At this time, the RFID tag randomly attached to the article in the recognition range can be smoothly recognized according to the change of the direction or the position of the antenna. To this end, it may include driving means for changing the direction or position of the antenna, and a control circuit for driving the driving means driven by the power source mounted on the RF signal received from the recognition portion.
4 is a detailed configuration diagram of the
4, the
The
5 is an expanded configuration diagram of an RFID
Referring to FIG. 5, the
The
Since the first
The
The
The
The
The second
The second power supply circuit 345 is a circuit element having a high impedance characteristic located at the front end of the
Hereinafter, signals transmitted between the components of the
6 is an internal view of a
Referring to FIG. 6, the
7 is a reference view showing a flow of signals transmitted between the
Referring to FIG. 7, an RF signal and power are supplied through a
7, the power generated by the
7, an RF signal is transmitted from the
8 is a reference view showing a flow of signals transmitted between the
In FIG. 8, the difference from FIG. 7 is that the
The line F in Fig. 8 corresponds to the line D in Fig. 7, and the line G in Fig. 8 corresponds to the line D in Fig. The
The foregoing embodiments are intended to illustrate the present invention and the scope of the present invention is not limited to the specific embodiments.
Claims (18)
A recognition unit for supplying power to the antenna unit using an RF signal and reading tag information received by the plurality of antennas;
Wherein the RFID tag recognizing device comprises:
A transmission cable connecting the antenna unit and the recognition unit; Further comprising:
And a power source for transmitting the RF signal is transmitted from the recognition unit to the antenna unit through the transmission cable.
An RF output unit for outputting an RF signal;
A first power supply for supplying power; And
A first power supply circuit for transmitting power supplied through the first power supply unit to an RF signal output from the RF output unit;
Wherein the RFID tag recognizing device comprises:
A circuit element connected between the RF output section and the first power supply section and having a high impedance characteristic, the circuit element exhibiting an open circuit for an RF signal to prevent the first power supply section from being affected by the RF signal, And the RF signal level is prevented from being reduced by the power supply unit.
A connection node connected to the first power supply circuit and the RF output unit, and a capacitor connected between the RF output unit and performing DC blocking;
Further comprising: an RFID reader for receiving the RFID tag identification information.
An area - specific antenna located in each area of the shelf divided into fixed areas; And
An antenna distribution circuit for receiving a power from an RF signal transmitted from the recognition section and distributing a signal to be transmitted to the antenna for each area;
Wherein the RFID tag recognizing device comprises:
An RF switch for sequentially activating the antenna for each area; And
A control circuit that is driven by a power source mounted on an RF signal transmitted from the recognition unit and controls the RF switch;
Wherein the RFID tag recognizing device comprises:
A second power supply unit for receiving power supplied from the RF signal transmitted from the recognition unit and changing the power supply to the control circuit, and supplying the power to the control circuit;
Further comprising: an RFID reader for receiving the RFID tag identification information.
A circuit element having a high impedance characteristic and positioned at the front end of the control circuit or the second power supply part and having an open circuit for an RF signal so as to prevent the control circuit or the second power supply part from being affected by the RF signal, A second power supply circuit for blocking the RF signal level from being reduced by the control circuit or the second power supply;
Further comprising: an RFID reader for receiving the RFID tag identification information.
A capacitor positioned upstream of the RF switch to perform DC blocking;
Further comprising: an RFID reader for receiving the RFID tag identification information.
An area-specific antenna formed around an attachment to which an RFID tag is attached; And
An antenna distribution circuit for receiving a power from an RF signal transmitted from the recognition section and distributing a signal to be transmitted to the antenna for each area;
Wherein the RFID tag recognizing device comprises:
Wherein the attachment is a winding rod to which a sheet to which an RFID tag is to be attached is wound,
Wherein the antenna for each area is disposed at a position opposite to each other with the winding rod therebetween.
A connecting member connecting the antenna for each area to the equipment having the winding rods;
Further comprising: an RFID reader for receiving the RFID tag identification information.
An RF switch for sequentially activating the antenna for each area; And
A control circuit that is driven by a power source mounted on an RF signal transmitted from the recognition unit and controls the RF switch;
Wherein the RFID tag recognizing device comprises:
A second power supply unit for receiving power supplied from the RF signal transmitted from the recognition unit and changing the power supply to the control circuit and supplying the power to the control circuit;
Further comprising: an RFID reader for receiving the RFID tag identification information.
A circuit element having a high impedance characteristic and positioned at the front end of the control circuit or the second power supply part and having an open circuit for an RF signal so as to prevent the control circuit or the second power supply part from being affected by the RF signal, A second power supply circuit for blocking the RF signal level from being reduced by the control circuit or the second power supply;
Further comprising: an RFID reader for receiving the RFID tag identification information.
A capacitor positioned upstream of the RF switch to perform DC blocking;
Further comprising: an RFID reader for receiving the RFID tag identification information.
A driving unit for changing a direction or a position of the antenna for each area; And
A control circuit that is driven by a power source mounted on an RF signal received from the recognition unit and controls the driving unit;
Wherein the RFID tag recognizing device comprises:
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| KR1020130043071A KR20140125919A (en) | 2013-04-18 | 2013-04-18 | RF Tag reader using RF signal to power supply source |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| KR1020130043071A KR20140125919A (en) | 2013-04-18 | 2013-04-18 | RF Tag reader using RF signal to power supply source |
Publications (1)
| Publication Number | Publication Date |
|---|---|
| KR20140125919A true KR20140125919A (en) | 2014-10-30 |
Family
ID=51995439
Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| KR1020130043071A KR20140125919A (en) | 2013-04-18 | 2013-04-18 | RF Tag reader using RF signal to power supply source |
Country Status (1)
| Country | Link |
|---|---|
| KR (1) | KR20140125919A (en) |
-
2013
- 2013-04-18 KR KR1020130043071A patent/KR20140125919A/en not_active Application Discontinuation
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