KR100652022B1 - Apparatus and method for improving recognition rate between tag and reader - Google Patents

Abstract

A device and a method for improving a recognition ratio between a tag and a reader are provided to improve the recognition ratio for multiple RFID(Radio Frequency IDentification) tags by controlling intensity or a type of a signal emitted from an antenna angle of the RFID reader as well as an angle and height of the antenna according to a position of the moving RFID tag. The RFID tag(10) stores detail information for a specific article. The antenna(11) recognizes the RFID tag according to control of the RFID reader(17) by being installed to a moving path of the article. A sensor(14) detects position information of the article by being installed to an input/output position of the moving path. A speed sensor(19) detects a moving speed of the article. A speed sensor receiver(20) receives speed information of the article from the speed sensor. A computer(18) collects the information from the tag by controlling the RFID reader and a driving motor(13) according to the information received from the sensor and the speed sensor receiver. The driving motor adjusts point way of the antenna according to the control of the computer.

Description

Apparatus for improvement of read rate between RFID tag and reader}

1 is a view illustrating a process of recognizing a tag attached to an object loaded on a pallet when a conventional forklift carries goods;

FIG. 2 is a view illustrating a beam pattern of an antenna of an apparatus for improving a recognition rate between a tag and a reader according to the present invention; FIG.

3A to 3C are diagrams illustrating an antenna angle control method of an apparatus for improving a recognition rate between a tag and a reader according to the present invention;

4 is a flowchart illustrating a method of improving a recognition rate between a tag and a reader according to the present invention.

<Explanation of symbols for main parts of the drawings>

10: tag 11: antenna

12: gate 13: electric motor

14 sensor 15 pallet

16: forklift 17: reader

18 computer 19 speed sensor

20: speed sensor receiver

The present invention relates to a device for improving the recognition rate between a tag and a reader and a method thereof, and more particularly, to which an antenna of a RFID reader is attached to a forklift-loaded object for transporting and storing cargo in a warehouse or a factory. When passing through the gate, the sensor is attached to the gate in advance to detect the forklift entering the angle, height and direction of the RFID reader antenna as well as the RFID tag antenna of the object tagged A device for improving the recognition rate between the tag and the reader by controlling the movement position, that is, controlling the strength and shape of the signal radiated from the RFID reader antenna, thereby improving the recognition rate between the tag and the RFID reader antenna. And to a method thereof.

Conventional radio reader (RFID) antennas have used a method of recognizing a tag attached to an object or a product that emits a signal within a certain range and is located within that range. However, in this case, if the number of moving tags or the speed of moving a tagged object or merchandise is fast enough to ensure that the antenna of the RFID reader does not have enough time to recognize the tag, the RFID reader There is a problem that the recognition rate to recognize the tag is lowered. This will be described in more detail with reference to FIG. 1 as an example.

1 is a diagram illustrating a process of recognizing a tag attached to an object loaded on a pallet when a conventional forklift carries goods.

As shown in FIG. 1, when a conventional forklift carries a product, a process of recognizing a tag attached to an object loaded on a pallet is performed by the forklift 16 carrying a tagged object on a pallet 15 and wirelessly recognized. The tag 10 attached to the object on the pallet 15 is recognized at the point where the antenna 11 of the (RFID) reader passes through the attached gate 12. However, in this case, since the forklift 16 has to recognize all the tags 10 attached to the object on the pallet 15 within the time that the forklift 16 passes through the gate 12, the recognition time is very short so that all the tags 10 can be recognized. It is difficult to secure enough time to recognize, and there is a problem in that the recognition rate between the tag and the reader is lowered accordingly.

In recent years, as the application of the RFID system is increasing, applications are being expanded not only for forklifts and containers, but also for conveyor belts and mail, and the number of tags to be recognized at one time is increasing. There is an urgent need to improve the recognition rate between a moving tag and a reader.

SUMMARY OF THE INVENTION The present invention has been proposed to solve the above problems and meet the above requirements, and improves the recognition rate between a tag and a reader by controlling the antenna angle of the reader according to the moving tag in order to improve the recognition rate for a plurality of moving tags. It is an object of the present invention to provide an apparatus and a method thereof.

In addition, the present invention is to improve the recognition rate for a plurality of tags, to control the antenna angle and height of the reader to match the position of the tag to move, the recognition rate improvement device between the tag and the reader, There is another purpose to provide the method.

That is, in the present invention, when a forklift loads a tagged object to transport and store a cargo in a warehouse and a factory, and passes through a gate to which an antenna of a RFID reader is attached, the sensor is attached to the gate. Tagging the RFID reader antenna by controlling the strength or shape of the signal radiated from the RFID reader antenna as well as the angle, height, and direction of the RFID reader antenna by detecting in advance It is an object of the present invention to provide an apparatus and a method for improving a recognition rate between a tag and a reader, by improving the recognition rate between a tag and an RFID reader antenna by matching a moving position of a tagged object.

Other objects and advantages of the present invention can be understood by the following description, and will be more clearly understood by the embodiments of the present invention. It will also be appreciated that the objects and advantages of the present invention may be realized by the means and combinations thereof indicated in the claims.

An apparatus of the present invention for achieving the above object is a tag that stores detailed information about a particular article; An antenna installed in a movement path of the specific article to recognize the tag under the control of a reader; A sensor installed at an entry / exit position of the movement path to detect position information of the specific article; A speed sensor for detecting a moving speed (speed information) of the specific article; A speed sensor receiver for receiving speed information of the specific article from the speed sensor; Control means for controlling the reader and the driving means according to the information from the sensor and the speed sensor receiver to collect information of the tag; The driving means for adjusting the directing direction of the antenna according to the control of the control means; And a reader connected to the control means to be controlled, the reader for controlling the antenna to recognize the tag and transmitting the information to the control means.

The method of the present invention for achieving the above object comprises the steps of: obtaining entry information of a particular article; A first control step of controlling a directing direction of a reader antenna toward the specific article according to the obtained entry information of the specific article; A speed information obtaining step of obtaining a moving speed (speed information) of the specific article; A second control step of controlling a directing direction of the reader antenna toward the specific article according to the obtained speed information of the specific article; And acquiring detailed information about the specific article from a tag while repeatedly performing the speed information obtaining step and the second control step until the entry information of the specific article is obtained.

The above objects, features, and advantages will become more apparent from the following detailed description taken in conjunction with the accompanying drawings, whereby those skilled in the art may easily implement the technical idea of the present invention. There will be. In describing the present invention, when it is determined that the detailed description of the known technology related to the present invention may unnecessarily obscure the gist of the present invention, the detailed description thereof will be omitted. Hereinafter, exemplary embodiments of the present invention will be described in detail with reference to the accompanying drawings.

FIG. 2 is a diagram illustrating a beam pattern of an antenna of an apparatus for improving a recognition rate between a tag and a reader according to the present invention.

As shown in FIG. 2, it can be seen that the beam pattern exiting from the antenna 11 is a pattern maintaining a 3 dB beam width.

3a to 3c are diagrams illustrating an antenna angle control method of a device for improving a recognition rate between a tag and a reader according to the present invention.

As shown in Figures 3a to 3c, the recognition rate improving device between the tag and the reader according to the present invention, a forklift 16 for carrying and carrying goods, the pallet 15 placed on the forklift 16 to support the goods And a tag 10 having the detailed information of the object and attached to the object and sensed by the antenna 11 of the reader, the antenna 11 is attached, and the gate 12 through which the forklift 16 passes. In addition, the antenna 11 attached to the gate 12 and controlled by the reader 11 may be installed in the front and rear of the gate 12 (eg, an entry / exit position, etc.) (or may be installed along a moving path). A sensor 14 for detecting the position information (eg, entry / exit) of the tag 10 and the forklift 16, and attached to the forklift 16 so as to move the speed of the forklift 16. Speed sensor for detecting and transmitting information) to the speed sensor receiver 20 19, the speed sensor receiver 20 for receiving the speed information of the forklift 16 from the speed sensor 19, the reader 17 according to the information from each sensor 14 and the speed sensor receiver 20 And a computer 18 for collecting the information of the tag 10 by controlling the electric motor 13 and a direction in which the antenna 11 is directed (eg, angle, height, direction) under the control of the computer 17. Etc.) and is connected to the electric motor 13 and the computer 17 to be controlled, and controls the antenna 11 to recognize the tag 10 and transmit the information to the computer 18. A reader 17 for delivery.

Next, the detailed configuration and operation of each component will be described in more detail.

First, when the forklift 16 passes through the gate 12 to enter a warehouse to load, the sensor 14 is installed at the front and rear of the gate 12 to sense the position of the forklift 16. The computer 18, which receives the detection signal from the sensor 14, recognizes this. As the forklift 16 enters the gate 12, the electric motor 13 causes the directions of the antennas 11 of the reader 17 to be directed in the moving direction of the forklift 16, respectively, by the command of the computer 18. To control. At this time, the movement of the angle, height and direction of the antenna 11 is performed by a mechanical device such as an electric motor 13 connected and controlled by the computer 18, the speed sensor 19 attached to the forklift 16 Using the speed sensor receiver 20 is implemented to recognize the moving speed and the moving direction of the forklift (16). Of course, other known methods may be used to detect the speed of the forklift.

In addition, when the forklift 16 moves from the warehouse to the pallet 12, which is a bundle of goods with the tag 10 attached thereto, and moves to pass through the gate 12 again, the forklift 16 in the antennas 11. By transmitting the appropriate signal according to the direction and angle according to the position information of the) to read the information of the tag 10 moving along the forklift 16 for as long as possible while the forklift 16 moves.

3A to 3C, the sensor 14 detects the direction of the forklift, and the speed sensor 19 detects the moving speed of the forklift. Accordingly, the current position and the moving speed of the forklift 16 are input to the computer 18, and the computer 18 calculates the distance and angle with the antennas 11 through the distance or the moving speed with the forklift 16. Thus, the computer 18 commands to control the angle of each antenna 11 installed in the gate. In addition, the computer 18 detects the position of the forklift 16 as well as the distance to the forklift 16 detected by the sensor 14, and controls the angle of the antenna 11 to thereby move the moving tag 10. The output signal can be controlled for the most effective reading.

In this case, the computer 18 may detect the entry of the forklift through the sensor 14 in advance and control the angle, height and direction of the RFID reader antenna 11 through the electric motor 13. In addition, it is also possible to control the strength or shape of the signal radiated (radiated) from the RFID reader antenna through the reader 17.

4 is a flowchart illustrating a method of improving a recognition rate between a tag and a reader according to the present invention.

First, when the forklift 16 carrying the object with the tag 10 enters near the sensor 14 in front of the gate 12 (401), the sensor 14 recognizes the forklift and displays the information on the computer 18. (402).

Accordingly, the computer 18 receiving the signal from the sensor 14 operates the reader 17 and also operates the electric motor 13 to control the directing direction of the antenna 11 toward the forklift (403). ).

Accordingly, the antenna 11 and the reader 17 read information about the product of the tag 10 attached to the object and transmit it to the computer 18, and the computer 18 displays the information about the product. (404).

The speed sensor 16 transmits the speed data of the forklift 16 to the speed sensor receiver 20 (405), and the speed sensor receiver 20 transmits the speed data of the forklift to the computer 18 (406). ).

Accordingly, the computer 18 analyzes the speed data to control the electric motor 13 to control the antenna 11 to always face the forklift (407).

Thereafter, the forklift proceeds through the gate and accordingly repeats the steps "405" to "407" to obtain information from the tag with sufficient time (408). Then, if the forklift 16 is not recognized by the sensor 14, the computer 18 turns off the reader (409).

The present invention described above is capable of various substitutions, modifications, and changes without departing from the technical spirit of the present invention for those skilled in the art to which the present invention pertains. It is not limited by the drawings.

The present invention as described above, by receiving the position information of the moving tag through the sensor, by controlling the angle of the antenna of the RFID reader, there is an effect that can improve the recognition rate for a plurality of moving tags. .

That is, the present invention has the effect of improving the recognition rate of a plurality of tags by controlling the antenna angle and height of the reader as well as the intensity or shape of the copied signal to match the position of the moving tag.

That is, in the present invention, when a forklift loads a tagged object to transport and store a cargo in a warehouse and a factory, and passes through a gate to which an antenna of a RFID reader is attached, the sensor is attached to the gate. It detects in advance that the RFID reader antenna is controlled by controlling the strength or shape of the signal radiated from the RFID reader antenna as well as the angle, height and direction of the RFID reader antenna. By matching the to the moving position of the tagged object there is an effect that can improve the recognition rate between the tag and the RFID reader antenna.

Claims (6)

A tag that stores detailed information about a specific article; An antenna installed in a movement path of the specific article to recognize the tag under the control of a reader; A sensor installed at an entry / exit position of the movement path to detect position information of the specific article; A speed sensor for detecting a moving speed (speed information) of the specific article; A speed sensor receiver for receiving speed information of the specific article from the speed sensor; Control means for controlling the reader and the driving means according to the information from the sensor and the speed sensor receiver to collect information of the tag; The driving means for adjusting the directing direction of the antenna according to the control of the control means; And The reader connected to the control means and controlled, and controlling the antenna to recognize the tag and to transmit the information to the control means. Apparatus for improving the recognition rate between the tag and the reader. The method of claim 1, The control means, Recognizing the position of the particular article according to the information from the sensor and the speed sensor receiver to control the angle, height, direction of the antenna through the drive means to direct the antenna to the particular article. Device for improving recognition rate between tag and reader. The method according to claim 1 or 2, The control means, And recognizing the position of the specific article according to the information from the sensor and the speed sensor receiver to control the strength or shape of the signal radiated from the antenna through the reader. Obtaining entry information of a specific article; A first control step of controlling a directing direction of a reader antenna toward the specific article according to the obtained entry information of the specific article; A speed information obtaining step of obtaining a moving speed (speed information) of the specific article; A second control step of controlling a directing direction of the reader antenna toward the specific article according to the obtained speed information of the specific article; And Acquiring detailed information about the specific article from a tag while repeatedly performing the speed information obtaining step and the second control step until the entry information of the specific article is obtained; How to improve the recognition rate between the tag and the reader. The method of claim 4, wherein The first and second control step, And controlling the angle, height and direction of the reader antenna so that the reader antenna faces the specific article. The method according to claim 4 or 5, The first and second control step, A method of improving the recognition rate between a tag and a reader, characterized in that for controlling the strength or shape of the signal radiated from the reader antenna.

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