TWI423138B - Radio frequency identification tag grouping system - Google Patents

Description

Radio frequency identification tag grouping system

The present invention relates to a clustering system, and more particularly to a radio frequency identification tag grouping system.

Referring to FIG. 1, a commercially available radio frequency identification tag (RFID) reading system is mostly designed for an environment including a single gateway. Therefore, if such a reading system is applied to an environment including multiple gates, it is provided in a gate. The antenna 12 of the track 11 not only reads the radio frequency identification tag 13 on the item passing through the gateway 11, but also may also read the radio frequency identification tag 13' on the item passing through the adjacent gateway 11', so the antenna The radio frequency identification tags read by 12 cannot be directly regarded as being included in a group associated with the gateway 11, that is, they cannot be directly regarded as belonging to the same group.

In order for the radio frequency identification tag 13 read from the antenna 12 to obtain which radio frequency identification tags are included in the group associated with the gateway 11, that is, correctly grouping, known methods include: (1) the antenna 12 adopts a back To the coated directional antenna to avoid reading the radio frequency identification tag 13' on the article passing away from the adjacent gateway 11', and the radio frequency identification tag 13 read by the antenna 12 is included in both The group associated with the gateway 11; (2) increasing the spacing of the two adjacent gateways 11, 11' to prevent the antenna 12 from reading the RFID tag 13' on the item passing through the adjacent gateway 11', And the radio frequency identification tag 13 read by the antenna 12 is regarded as being included in the group associated with the gateway 11; (3) an electric wave shielding wall is installed between the two adjacent gateways 11 and 11' to avoid The antenna 12 reads the radio frequency identification tag 13' on the item passing through the adjacent gateway 11', and the radio frequency identification tag 13 read by the antenna 12 is regarded as being included in the group associated with the gateway 11; And (4) the signal strength of the radio frequency identification tag read according to the antenna 12 (which is affected by the antenna 12 and the radio frequency The distance between the tags is affected by the proximity of the tags to determine which of the radio frequency identification tags are included in the group associated with the gateway 11.

However, the method (1) cannot prevent the antenna 12 from reading the radio frequency identification tag 13' on the article passing the positive adjacent gateway 11'; the methods (2) and (3) are only applicable to a space with a large space. Moreover, the antenna 12 is not completely prevented from being read by the radio frequency identification tag 13' on the article passing through the adjacent gateway 11'; and in the method (4), the plurality of articles passing through the gateway 11 are stacked on each other, etc. The signal causes the signal radiated by the radio frequency identification tag 13 on the article to be attenuated to a different extent, so that the signal strength of the radio frequency identification tag read by the antenna 12 does not necessarily reflect the antenna 12 and the radio frequency identification tag 13 correctly. The distance is far and near. Therefore, these methods cannot obtain reliable clustering results.

Accordingly, it is an object of the present invention to provide a radio frequency identification tag grouping system that can solve the prior art problems.

Therefore, the radio frequency identification tag grouping system of the present invention is applicable to an environment having a plurality of gates arranged at right and left intervals, and each gate can be passed through a plurality of articles respectively provided with a plurality of radio frequency identification tags. The RFID tag grouping system comprises a main right antenna, a main left antenna, an auxiliary right antenna group, a reading unit and a processor.

The main right antenna is disposed on the left side of the target gateway and transmits a signal to the right side of the location.

The main left antenna is disposed on the right side of the target gateway and transmits a signal to the left side of the location.

The auxiliary right antenna group is located on the right side of the main left antenna and transmits a signal to the right side of the position.

The reading unit is electrically connected to the main right antenna, the main left antenna and the auxiliary right antenna group, and reads the main right antenna, the main left antenna and the auxiliary right antenna group Radio frequency identification tag.

The processor is electrically connected to the reading unit, and determines, according to the reading unit, the radio frequency identification tags read by the main right antenna, the main left antenna, and the auxiliary right antenna group. Which radio frequency identification tags are included in the target group related to the target gateway.

Yet another object of the present invention is to provide a radio frequency identification tag grouping system that can solve the prior art problems.

Therefore, the radio frequency identification tag grouping system of the present invention is applicable to an environment having first to Nth gates arranged from left to right, N 2, and each gate is available for a plurality of items respectively provided with a plurality of radio frequency identification tags. The RFID tag grouping system comprises a first to Nth right antenna, a first to N-1 left antenna, a metal plate, a reading unit and a processor.

The ith right antenna is disposed on the left side of the i-th gate, and transmits a signal to the right side of the position, i=1, . . . , N.

The jth left antenna is disposed on the right side of the jth gate, and transmits a signal to the left side of the position, j=1, . . . , N-1.

The metal plate is disposed on the right side of the Nth gate.

The reading unit is electrically connected to the right antenna and the left antenna, and the radio frequency identification tags are read by the right antenna and the left antenna.

The processor is electrically connected to the reading unit, and is determined to be respectively associated with the first to the Nth according to the readout unit using the rightward antenna and the radio frequency identification tags read by the left antennas. Which radio frequency identification tags are included in each of the plurality of groups associated with the gateway, and the radio frequency identification tags read from the Nth right antenna are deleted from the same radio frequency identification tags included in the group And a portion of the radio frequency identification tag included in the group associated with the Nth gateway.

The effect of the present invention is that, by the relative position and directivity configuration of the antennas, even if the antennas disposed on either side of any of the gateways are read into the RFID tags passing through the adjacent gateways, the radio frequency identification can be eliminated. Labels provide reliable clustering results.

The above and other technical contents, features and advantages of the present invention will be apparent from the following detailed description of the preferred embodiments of the invention.

Before the present invention is described in detail, it is noted that in the following description, similar elements are denoted by the same reference numerals.

Referring to FIG. 2, a first preferred embodiment of the radio frequency identification tag grouping system of the present invention is applicable to an environment having first to Nth gates 1-1~1-N arranged from left to right, N 2, and each of the gateways 1-1~1-N is permeable to a plurality of articles respectively provided with a plurality of radio frequency identification tags 7. The RFID tag grouping system comprises a first to Nth right antennas 2-1~2-N, a first to N-1 left antenna 3-1~3-(N-1), and a metal plate. 4. A reading unit 5 and a processor 6.

The reading unit 5 is electrically connected to the right antennas 2-1~2-N and the left antennas 3-1~3-(N-1), and the right antennas 2-1~2 are utilized. -N and the left antennas 3-1~3-(N-1) read the radio frequency identification tags 7.

The i-th (i=1, . . . , N) right-hand antenna 2-i is disposed on the left side of the i-th gate 1-i, and transmits a signal toward the right side of the position, so the i-th right direction is transmitted. The antenna 2-i not only reads part or all of the radio frequency identification tag 7 of the items passing through the i-th gate 1-i, but also may read the radio frequency of the part of the item passing the right side of the gate. Identification tag 7, for example, when N=4, not only the radio frequency identification tag 7 of some or all of the items passing through the first gateway 1-1 but also the radio frequency identification tag 7 through the first gateway 1-1, and The radio frequency identification tag 7 of the parts passing through the second gateway 1-2, the third gateway 1-3, and the fourth gateway 1-4 may be read through the second right antenna 2 -2 will not only read part or all of the RFID tags 7 of the items passing through the second gateway 1-2, but may also read through the third gates 1-3 and the fourth gates 1 - The radio frequency identification tag 7 of the portion of the items of 4, through the third right antenna 2-3, not only reads part or all of the radio frequency identification tags 7 of the items passing through the third gateway 1-3, but also It is possible to read the pass The radio frequency identification tag 7 of the portion of the items of the fourth gate 1-4.

The jth (j=1, . . . , N-1) left antenna 3-j is disposed on the right side of the jth gate 1-j, and transmits a signal to the left side of the position, so the jth left The antennas 3-j will not only read some or all of the radio frequency identification tags 7 of the items passing through the j-th gate 1-j, but may also read portions of the items passing through the left side of the gate. Radio frequency identification tag 7, for example, when N=4, through the third left antenna 3-3, not only will the radio frequency identification tag 7 of some or all of the items passing through the third gateway 1-3 be read, It is also possible to read the radio frequency identification tag 7 of the portion of the articles passing through the second gateway 1-2 and the first gateway 1-1, and the second left antenna 3-2 will not only read through the second left antenna 3-2. The radio frequency identification tag 7 of some or all of the items of the second gateway 1-2 may also read the radio frequency identification tag 7 of the portion of the article passing through the first gateway 1-1.

Since the jth right antenna 2-j and the jth left antenna 3-j are respectively disposed on both sides of the jth gate 1-j, the reading unit 5 can utilize the jth right and left antennas 2-j, 3-j read the radio frequency identification tags 7 of the articles passing through the j-th gate 1-j from two left and right opposite angles, thereby avoiding missing reading due to stacking of the articles with each other The problem with the RFID tag 7 is the same.

The metal plate 4 is disposed on the right side of the Nth gate 1-N, so that the rightward propagating electromagnetic wave emitted by the Nth right antenna 2N disposed on the left side of the Nth gate 1-N is The metal plate 4 reflects and turns into an electromagnetic wave propagating in the left direction, so the Nth right antenna 2 disposed in the Nth gate 1-N has read from the left and right opposite directions through the Nth gate 1-N. The functions of the identification labels 7 of the items can avoid the problem that the items are stacked on each other and cause the radio frequency identification tags 7 to be missed, but the proximity gates may also be generated due to the arrangement of the metal plates 4. The problem with these radio frequency identification tags 7 of the road.

The processor 6 is electrically connected to the reading unit 5, and according to the reading unit 5, the right antennas 2-1~2-N and the left antennas 3-1~3-(N-1) are used. The read radio frequency identification tags 7 determine which radio frequency identification tags 7 are included in each of the plurality of groups associated with the first to N-1th gates 1-1~1-(N-1).

Referring to FIG. 3, for example, when the processor 6 (see FIG. 2) selects the first gateway 1-1 as a target gateway 1', it is determined that a target group associated with the target gateway 1' includes When the RFID tags 7 are located, the first right antenna 2-1 and the first left antenna 3-1 respectively disposed on both sides of the target gateway 1' are regarded as a main right antenna 2', respectively. And a main left antenna 3', and the right antennas 2-2~2-N located at the right side of the position of the main left antenna 3' are collectively regarded as an auxiliary right antenna group R, for example, When N=4, the auxiliary right antenna group R includes second to fourth right antennas 2-2 to 2-4.

The processor 6 (see FIG. 2) removes duplicate portions from the radio frequency identification tags 7 read by the main right antenna 2' and the main left antenna 3', and deletes and utilizes the auxiliary right The same portion of the radio frequency identification tags 7 read by the antenna group R for excluding the radio frequency identification tags 7 of the adjacent gateways read, and obtaining the target group associated with the target gateway 1' The radio frequency identification tags 7 included in the group.

Referring to FIG. 4, when the processor 6 (see FIG. 2) selects any of the gates between the first and Nth gates 1-1, 1-N (for example, the third gate 1-3) as the The target gateway 1', and determining which radio frequency identification tags 7 are included in the target group associated with the target gateway 1', the third right antennas 2 respectively disposed on both sides of the target gateway 1' 3 and the third left antenna 3-3 will be regarded as a main right antenna 2' and a main left antenna 3', respectively, and the right antennas located on the right side of the position of the main left antenna 3' 2 is collectively regarded as an auxiliary right antenna group R, and the left antennas 3 located at the left side of the position of the main right antenna 2' are collectively regarded as an auxiliary left antenna group L, for example, at N= At 4 o'clock, the auxiliary right antenna group R includes a fourth right antenna 2-4, and the auxiliary left antenna group L includes second and first left antennas 3-2, 3-1.

The processor 6 (see FIG. 2) removes duplicate portions from the radio frequency identification tags 7 read by the main right antenna 2' and the main left antenna 3', and deletes and utilizes the auxiliary right The same portions of the radio frequency identification tags 7 read by the antenna group R and the auxiliary left antenna group L are used to respectively exclude the radio frequency identification tags 7 of the gates adjacent to the right and left sides of the read And obtaining the radio frequency identification tags 7 included in the target group associated with the target gateway 1'.

The processor 6 (see FIG. 2) can determine which radio frequency identification tags are included in each of the groups associated with the first to N-1th gates 1-1~1-(N-1) based on the above method. 7, so that only the same parts of the radio frequency identification tags 7 included in the group are deleted from the radio frequency identification tags 7 read by the Nth right antenna 2-N to exclude reading. The radio frequency identification tags 7 of the adjacent gateways are located to obtain the radio frequency identification tags 7 included in the group associated with the Nth gates 1-N.

It is worth noting that the above grouping results are available for further information, such as: what items are passed through each gate 1-1~1-N, or how many items pass through each gate 1-1~1-N .

Referring to FIG. 5, a second preferred embodiment of the radio frequency identification tag grouping system of the present invention is similar to the first preferred embodiment, except that: (1) the second preferred embodiment has an Nth left antenna. 3-N replaces the metal plate 4 of the first preferred embodiment (see FIG. 2); and (2) the processor 6 of the second preferred embodiment determines the relationship associated with the Nth gate 1-N The method of including the radio frequency identification tags 7 in the group is a method in which the processor 6 in the first preferred embodiment determines which radio frequency identification tags 7 the group associated with the first gateway 1-1 includes.

In summary, the main right antenna 2' and the main left antenna 3' are arranged, and the right antenna 2-N disposed on the Nth gate 1-N is matched with a metal. The configuration of the board 4 can reduce the problem of missing the radio frequency identification tag 7 of the target gateway 1', and cooperate with the auxiliary right antenna group R or with the auxiliary right antenna group R and the auxiliary The left antenna group L collectively judges and deletes the radio frequency identification tags 7 of the adjacent gateways that are read, thereby providing reliable clustering results, and thus the object of the present invention can be achieved.

The above is only the preferred embodiment of the present invention, and the scope of the invention is not limited thereto, that is, the simple equivalent changes and modifications made by the scope of the invention and the description of the invention are All remain within the scope of the invention patent.

11. . . Gateway

11’. . . Gateway

12. . . antenna

13. . . Radio frequency identification tag

13’. . . Radio frequency identification tag

1-1~1-N. . . Gateway

2-1~2-N. . . Right antenna

1'. . . Gateway

2'. . . Main right antenna

3-1~3-N. . . Left antenna

3’. . . Main left antenna

4. . . Metal plate

5. . . Reading unit

6. . . processor

7. . . Radio frequency identification tag

R. . . Right-direction auxiliary antenna group

L. . . Left-direction auxiliary antenna group

1 is a schematic diagram showing a conventional RFID tag reading system disposed in a multi-gate environment;

2 is a schematic diagram showing the first preferred embodiment of the radio frequency identification tag grouping system of the present invention disposed in a multi-gate environment;

3 is a schematic diagram showing an arrangement of the plurality of antennas of the first preferred embodiment and the environment of the multi-gate;

4 is a schematic diagram showing another configuration of the environment of the plurality of antennas and the multi-gateway of the first preferred embodiment; and

FIG. 5 is a schematic diagram showing the second preferred embodiment of the radio frequency identification tag grouping system of the present invention disposed in the multi-gate environment.

1-1~1-N. . . Gateway

2-1~2-N. . . Right antenna

3-1~3-N. . . Left antenna

4. . . Metal plate

5. . . Reading unit

6. . . processor

7. . . Radio frequency identification tag

Claims (5)

A radio frequency identification tag grouping system is applicable to an environment having a plurality of left and right spaced gates, each gate being permeable to a plurality of items respectively provided with a plurality of radio frequency identification tags, the group system comprising: a main right To the antenna, disposed on the left side of a target gateway in the gates, and transmitting a signal to the right side of the location; a main left antenna is disposed on the right side of the target gateway and transmitted to the left side of the location a signal; an auxiliary right antenna group located on the right side of the main left antenna and transmitting a signal to the right side of the position; a reading unit electrically connected to the main right antenna, the main left antenna, and the auxiliary right And the radio frequency identification tag is read by the main right antenna, the main left antenna and the auxiliary right antenna group; and a processor electrically connected to the reading unit, and according to the reading The unit uses the primary right antenna, the primary left antenna, and the radio frequency identification tags read by the auxiliary right antenna group to determine which radio frequency identification tags are included in the target group related to the target gateway. The radio frequency identification tag grouping system according to claim 1, wherein the processor removes duplicate parts from the radio frequency identification tags read by using the main right antenna and the main left antenna And deleting the same portions as the radio frequency identification tags read by the auxiliary right antenna group to obtain the radio frequency identification tags included in the target group. The radio frequency identification tag grouping system according to claim 1, further comprising: an auxiliary left antenna group located at a left side of the main right antenna position, and transmitting a signal to the left side; the reading unit is further powered Connecting to the auxiliary left antenna group, and reading the radio frequency identification tags by using the auxiliary left antenna group; the processor is further configured to use the radio frequency identification read by the auxiliary left antenna group according to the reading unit A tag that determines which radio frequency identification tags are included in the target group. The radio frequency identification tag grouping system according to claim 3, wherein the processor removes duplicates from the radio frequency identification tags read by the main right antenna and the main left antenna And deleting the same portion of the radio frequency identification tags read by the auxiliary right antenna group and the auxiliary left antenna group to obtain the radio frequency identification tags included in the target group. A radio frequency identification tag grouping system suitable for an environment having first to Nth gates arranged from left to right, N 2, each gateway is permeable to a plurality of items respectively provided with a plurality of radio frequency identification tags, the radio frequency identification tag grouping system comprising: a first to Nth right antenna, the ith right antenna is disposed in the The left side of the i gate, and the signal is transmitted to the right side of the position, i=1, . . . , N; a first to N-1 left antenna, and the jth left antenna is disposed at the jth gate The right side of the track, and the signal is transmitted to the left side of the position, j=1,...,N-1: a metal plate is disposed on the right side of the Nth gate; a reading unit is electrically connected to the same a right-facing antenna and the left-facing antennas, and reading the radio frequency identification tags by using the right-facing antennas and the left-facing antennas; and a processor electrically connected to the reading unit, and according to the reading unit Determining, by the right-facing antennas and the radio frequency identification tags read by the left-facing antennas, which radio frequency identification tags are respectively included in the plurality of groups respectively associated with the first to N-1th gates, and Deleting the same parts of the radio frequency identification tags from the Nth right antenna as the radio frequency identification tags included in the groups Dividing to obtain the radio frequency identification tags included in the group associated with the Nth gateway.