KR20100026181A - Conveyer structure for increasing identifying rfid tag - Google Patents

Abstract

PURPOSE: A conveyor structure for RFID tag recognition improvement is provided to improve tag recognition by completely exposing a tag existing in the electric wave blind spot of a target object to electric wave from an RFID reader. CONSTITUTION: A conveyor structure comprises a rear conveyor(400) which advances a target object, a rotary pusher(650) which is installed in front of the rear conveyor and pushes the target object which is transferred from the rear conveyor to the front, a front conveyor(450) which is installed in front of the rotary pusher and advances the target object pushed by the rotary pusher, a supporting guide(600) which is installed under the rotary pusher and supports the target object dropped from the rear conveyor, and a rotary pusher driving unit which rotates the rotary pusher.

Description

Conveyer Structure for Increasing Identifying RFID tag}

The present invention relates to a conveyor structure for improving the RFID tag recognition rate, and in particular, by transferring a recognition object with an RFID tag, the radio wave from the RFID reader can reach all sides of the recognition object by changing the attitude of the recognition object. The present invention relates to a conveyor structure for improving RFID tag recognition rate.

In general, radio frequency identification (RFID: R adio F requency Id entification) is by reading or writing information in a non-contact from the tag with the identification information inherent with the radio frequency tag is attached to the object or vehicle, animals, people, etc. Technology that enables you to recognize, track, and manage your business. Such an RFID system has a plurality of electronic tags (hereinafter referred to simply as 'tags') attached to a vehicle or an object having unique identification information, and an RFID reader (Reader or Interrogator) for reading or writing information on the tag. ) (Hereinafter also referred to simply as 'leader'). The RFID system is also divided into mutual induction and electromagnetic waves according to the intercommunication method between the reader and the tag, and is classified into active and passive types according to whether the tag operates on its own power. , Short wave, microwave and microwave. In accordance with the above classification, various kinds of standards are enacted or in preparation for enactment.

On the other hand, such an RFID system may be implemented in a large-scale mart, etc. In this case, a tag containing unique identification information will be attached to the goods in the store, and the RFID reader will be fixedly installed around the conveyor of the checkout counter. will be.

However, in the conventional RFID system as described above, the tag attached to the goods moving on the conveyor for the calculation is difficult to reach the radio wave from the reader antenna, for example, on the opposite or bottom surface of the RFID reader antenna. In this case, there was a problem that the recognition rate of the tag is lowered. This problem is further remarkable when the product is made of metal or uses a metal container.

SUMMARY OF THE INVENTION The present invention has been made to solve the above-described problems, and by changing the attitude of the recognition object in transferring the recognition object with the RFID tag, the radio wave from the RFID reader can reach all sides of the recognition object. In addition, an object of the present invention is to provide a conveyor structure for improving the RFID tag recognition rate to improve the tag recognition rate.

Conveyor structure for improving the RFID tag recognition rate of the present invention for achieving the above object is a rear conveyor for advancing the recognition object; A rotary push rod installed in front of the rear conveyor to push the recognition object forwarded from the rear conveyor to fall forward; A front conveyor installed in front of the rotary push rod to advance the recognition object pushed from the rotary push rod; It is provided in the lower portion of the rotary push rod and the support guide for supporting the recognition object falling from the rear conveyor so as not to leave and comprises a rotary push rod driving means for rotating the rotary push rod.

In the above-described configuration, it is preferable that the rotary push rod and the support guide are made of nonmetal, and the rear conveyor is preferably installed at a position higher than the front conveyor. On the other hand, it is preferable that the said support guide is an arc-shaped board | plate material which has the same radius of curvature as the trace of the edge part of the said rotary push rod.

Conveyor structure for improving the RFID tag recognition rate according to another aspect of the present invention comprises a rear conveyor for advancing the recognition object; A rotating cylinder installed in front of the rear conveyor and lowering while rotating the recognition object transferred from the rear conveyor and falling; It is installed at a lower height than the rear conveyor and is provided in front of the rotating cylinder to include a front conveyor for advancing the recognition object lowered through the rotating cylinder and a rotating cylinder driving means for rotating the rotating cylinder.

In the above-mentioned configuration, it is preferable that the rotating cylinder is a non-metallic cylindrical body or an ellipsoidal body whose upper and lower surfaces are open.

The conveyor structure for improving the RFID tag recognition rate according to another aspect of the present invention is installed at a lower position than the rear conveyor in front of the rear conveyor for advancing the recognition object and the recognition object falling from the rear conveyor to be dropped. It comprises a central conveyor for advancing.

In the above-described configuration, the front conveyor may further include a front conveyor installed at a height higher than the central conveyor and installed in front of the rotating cylinder to advance the recognition object transmitted through the central conveyor. In addition, the central conveyor is made of a non-metal material, it is preferable that the rear conveyor, the central conveyor and the front conveyor is a roller-type conveyor.

In addition, the structure is installed at the cashier of the merchandise store, the recognition object may be a product with an electronic tag attached.

According to the conveyor structure for improving the RFID tag recognition rate of the present invention, while the recognition object passes through the conveyor, its posture is changed from side to side or up and down, and in this process, the tag is placed on the radio blind spot of the recognition object and the tag is applied to the radio wave from the RFID reader. The positive exposure can significantly improve the recognition rate of the tag.

Hereinafter, with reference to the accompanying drawings will be described in detail a preferred embodiment of the conveyor structure for improving the RFID tag recognition rate of the present invention.

1 is an electrical block diagram of an RFID system to which the present invention can be applied. As shown in FIG. 1, the RFID system to which the present invention can be applied is mainly configured to radiate an RF signal toward a tag, to capture an RF signal emitted by the tag, and to display a predetermined frequency band toward the tag. For example, the RF module 320 and the tag transmitting the RF signal of the UHF (900MHz) band and the collision between (Collision) between the other reader and the various settings received from the host computer 100 and And a digital module 390 for performing a control command and transferring the tag information obtained by communicating with the tag to the host computer 100.

In the above-described configuration, the digital module 390 again includes a modem unit 352 which performs transmission and reception of data with a tag, collision coordination with another reader when occupying a frequency for communication with the tag, and the like. An RFID reader block (usually referred to as a Field Programmable Gate Array (FPGA)) 350, which is composed of an SDRAM 354 for temporarily storing various data generated in the control process 350, DAC block 335, which converts the digital data generated in the FPGA block 350 into an analog signal and provides the RF module 320, converts the analog signal received from the tag through the RF module 320 into digital data The power supply block 345 which provides various operating powers to the ADC block 330, the RF module 320, and the digital module 390 which are transmitted to the block 350, and the status display block 340 which displays various states of the RFID reader. ), Basic host I / F block 370, which is a basic communication interface for communicating with the host computer 100, and an optional host I / F block 375, which is an optional communication interface, and tag information. / F block 370 or option host I / F block 375 to pass to the host computer 100, in addition to the program or the host computer (100) according to the various settings and commands received from the FPGA block ( And a processor block 360 that collectively controls each block of the digital module 390 including the 350.

Meanwhile, the processor block 360 may debug a microprocessor, for example, an ARM9 processor 364 or a digital module 390, which is a 32-bit RISC processor for an embedded device developed by an ARM (Advanced RISC Machine) company. Joint Test Action Group (JTAG) 362, a flash ROM 368 for storing a program required for the operation of the processor 364, and an SDRAM 366 for temporarily storing various data generated during the operation of the processor 364. Can be made. The basic host I / F block 370 is again an Ethernet port 371 for performing Ethernet communication, serial communication such as RS-232 or RS-422, and Universal Serial Bus (USB) communication with the host computer 100, respectively. , A serial port 372 and a USB port 373. The option host I / F block 375 may further include a wireless LAN (WLAN) unit 376 and a code division multiple access (CDMA) unit 377.

Figure 2 is a schematic perspective view for explaining an embodiment of a conveyor structure for improving the RFID tag recognition rate of the present invention. As shown in Figure 2, the conveyor structure for improving the RFID tag recognition rate of the present invention may be applied to the checkout of a large store, for example, a mart. Conveyor structure according to the present embodiment may be composed of three parts, the rear conveyor 400 and the front conveyor 450 and the rear conveyor 400 and installed to be separated from each other to advance the goods 500 placed on the top and The rotary push rod 650 is installed between the front conveyor 450 and supports the rotary push rod 650 for pushing the goods 500 falling from the rear conveyor 400 and falling on the front conveyor 450 and the dropped goods. It may be made by including a support guide 600 for supporting the product pushed forward by the).

In the above-described configuration, the RFID reader or one or more antennas 310 connected in a wired manner separated from the RFID readers, in this embodiment, two antennas 310 are fixedly installed in place around the conveyor structure. On the other hand, the rotary push rod 650 and the support guide 600 may be made of a structure similar to laying the revolving door of the building, the difference from the revolving door is that the support guide is unnecessary on the upper side. Specifically, the rotary push rod 650 is composed of one or more push rods (four in this embodiment) can be rotated at a constant speed by a motor not shown in the predetermined speed. The support guide 600 is preferably made of an arc-shaped plate having the same radius of curvature as the trajectory formed by the end of the rotary push rod 650. Most of the rotary push rod 650 and the support guide 600 is RFID It is preferable to be implemented with a non-metallic material, for example, a synthetic resin material so that radio waves from the reader antenna 310 can be transmitted.

Furthermore, it is preferable to install the rear conveyor 400 at a position higher than the front conveyor 450 so that the goods 500 can be more reliably seated on the front conveyor 450, in which case the support guide 600 It is preferable that the heights of both ends be equal to the rear conveyor 400 and the front conveyor 450, respectively.

3 is an electrical block diagram of a conveyor structure for improving the RFID tag recognition rate of the present invention shown in FIG. As shown in Figure 3, the electrical configuration of the conveyor structure for improving the RFID tag recognition rate of the present invention is the rear conveyor drive unit 820 and the front conveyor drive unit for advancing the rear conveyor 400 and the front conveyor 450, respectively ( 830, a rotary push rod driving unit 840 for rotating the rotary push rod 650 at a predetermined speed, a key input unit 810 for receiving various key events from a user, and a controller 800 for controlling overall operations of the structure. It can be made, including.

In the above-described configuration, each conveyor drive 820. 830 may be made of a conventional motor, the rotational push drive 840 may also be made of a motor.

According to the present invention having the above-described configuration, the product 500 attached with the tag 510 is advanced while being mounted on the rear conveyor 400 and reaches the end thereof, and the product 500 thus dropped is supported. Supported by the guide 600 is not to be separated out. In this state, each of the rotary push rod 650 is rotated while pushing the goods 500 placed in front of them put the goods 500 on the front conveyor 450. As a result, in this process, the product 500 changes its posture at least once, so that the tag 510 which is in a position where the radio wave cannot reach is exposed to the radio wave from the RFID reader antenna 310 and recognized. .

Figure 4 is a schematic perspective view for explaining another embodiment of a conveyor structure for improving the RFID tag recognition rate of the present invention. As shown in Figure 4, the conveyor structure according to the present embodiment can also be largely composed of three parts, the rear conveyor 400 'and the front conveyor 450' for advancing the goods placed on top of each other installed and Rotating cylinder 600 'installed between the rear conveyor 400' and the front conveyor 450 'to rotate and lower the goods 500 transferred from the rear conveyor 400' to rest on the front conveyor 450 '. It may be made, including.

In the above-described configuration, the RFID reader or one or more antennas 310 connected in a wired manner separated from the RFID readers, in this embodiment, two antennas 310 are fixedly installed in place around the conveyor structure. On the other hand, the rear conveyor 400 'must be installed higher than the front conveyor 450'. The rotary cylinder 600 'may be formed of a cylindrical or ellipsoidal cylinder whose upper and lower surfaces are open. The rotary cylinder 600' must be installed so that its rotating shaft is inclined to adjust the height between the rear conveyor 450 'and the front conveyor 400'. do. Such a rotating cylinder 600 'is preferably rotated at a constant speed by a motor not shown at a predetermined speed, and most of them are made of non-metallic materials, such as synthetic resins, so that radio waves from the RFID reader antenna 310 can be transmitted. It is preferable that the material is implemented.

On the other hand, the electrical configuration of the structure of the present embodiment can be made the same as the configuration shown in Figure 3 except that the rotating rod drive is changed to the rotary cylinder drive.

According to the present invention having the above-described configuration, the article attached with the tag 510 is advanced while being mounted on the rear conveyor 400 'and then reaches its end and falls and slides into the rotating cylinder 600' and rotates again. As the cylinder 600 'rotates, the cylinder 600' falls down and rests on the front conveyor 450 '. In this process, the product 500 changes its posture at least once, so that the tag 510 which is in a position where the radio wave cannot reach is exposed to the radio wave from the RFID reader antenna 310 and recognized.

Figure 5 is a schematic perspective view for explaining another embodiment of a conveyor structure for improving the RFID tag recognition rate of the present invention. As shown in FIG. 5, the conveyor structure according to the present embodiment may also be largely composed of three parts. The rear conveyor 700, the front conveyor 710, and the rear conveyor (Advanced Conveyor), which are installed separately from each other and move forwarded goods, And a central conveyor 750 installed between the 700 and the front conveyor 710.

In the above-described configuration, each conveyor 700, 710, 750 has a plurality of cylindrical roller faces unlike the plate conveyor illustrated in Figs. 3 and 4 so that the goods 500 can be moved while changing the posture from time to time. It is preferable to implement the roller-type conveyor exposed as it is. Furthermore, the rear conveyor 700 and the front conveyor 710 are installed at the same height, but the central conveyor 750 is formed at a lower height to give a step to each other, regardless of the size of the product 500, the product 500 falls. It is desirable to change the posture with certainty. The central conveyor 750 is preferably implemented by using a non-metallic material to allow radio waves to be transmitted.

Conveyor structure for improving the RFID tag recognition rate of the present invention is not limited to the above-described embodiment can be implemented in various modifications within the range allowed by the technical idea of the present invention. For example, the front conveyor may be removed in the embodiment of FIG. 5 where space constraints occur.

1 is a detailed block diagram of an RFID system to which the present invention can be applied;

Figure 2 is a schematic perspective view for explaining an embodiment of a conveyor structure for improving the RFID tag recognition rate of the present invention,

3 is an electrical block diagram of a conveyor structure for improving the RFID tag recognition rate of the present invention shown in FIG.

4 is a schematic perspective view for explaining another embodiment of a conveyor structure for improving RFID tag recognition rate of the present invention;

Figure 5 is a schematic perspective view for explaining another embodiment of a conveyor structure for improving the RFID tag recognition rate of the present invention.

*** Explanation of symbols for the main parts of the drawing ***

100: host computer, 300: RFID reader,

310: antenna, 320: RF module,

330: ADC block, 335: DAC block,

340: status display block, 345: power block,

350: FFGA block, 352: modem section,

354: SDRAM, 360: processor block,

362: JTAG, 364: processor,

366: SDRAM, 368: Flash ROM,

370: basic host I / F block, 371: Ethernet port,

372: serial port, 373: USB port,

375: optional host I / F block, 376: WLAN,

377: CDMA, 390: Digital Module,

400, 400 ', 700: rear conveyor, 450, 450', 710: front conveyor,

500: product, 510: electronic tag,

600: support guide, 650: rotary push rod,

600 ': rotating cylinder, 800: control unit,

810: key input unit, 820: rear conveyor drive unit,

830: front conveyor drive unit, 840: rotary rod drive unit

Claims (12)

A rear conveyor for advancing the recognition object; A rotary push rod installed in front of the rear conveyor to push the recognition object forwarded from the rear conveyor to fall forward; A front conveyor installed in front of the rotary push rod to advance the recognition object pushed from the rotary push rod; A support guide installed at a lower portion of the rotary push rod to support the recognition object dropped from the rear conveyor so as not to be separated; Conveyor structure for improving the RFID tag recognition rate comprising a rotary push rod driving means for rotating the rotary push rod. The method of claim 1, The rotating rod and the support guide is a conveyor structure for improving the RFID tag recognition rate, characterized in that made of non-metal. The method of claim 2, The rear conveyor is a conveyor structure for improving the RFID tag recognition rate, characterized in that installed in a higher position than the front conveyor. The method of claim 3, wherein The support guide is a conveyor structure for improving the RFID tag recognition rate, characterized in that the circular arc plate having a radius of curvature equal to the trajectory of the end of the rotary push rod. A rear conveyor for advancing the recognition object; A rotating cylinder installed in front of the rear conveyor and lowering while rotating the recognition object transferred from the rear conveyor and falling; A front conveyor installed at a lower height than the rear conveyor and installed in front of the rotary cylinder to advance the recognition object lowered through the rotary cylinder; Conveyor structure for improving the RFID tag recognition rate comprising a rotating cylinder drive means for rotating the rotating cylinder. The method of claim 5, wherein The rotary cylinder is a conveyor structure for improving the RFID tag recognition rate, characterized in that the upper surface and the lower surface is a cylindrical body or an elliptic cylinder. The method of claim 6, The rotating cylinder is a conveyor structure for improving the RFID tag recognition rate, characterized in that made of non-metal. Rear conveyor for advancing the recognition object and And a central conveyor installed at a lower position than the rear conveyor in front of the rear conveyor to move the recognition object transferred from the rear conveyor and falling. The method of claim 8, Improved RFID tag recognition rate is further provided in front of the central conveyor is installed at a height higher than the central conveyor and installed in front of the rotating cylinder to advance the recognition object transmitted through the central conveyor. For conveyor structure. The method of claim 9, The central conveyor is a conveyor structure for improving the RFID tag recognition rate, characterized in that made of a non-metal material. The method of claim 10, And the rear conveyor, the central conveyor and the front conveyor are roller-type conveyors. The method according to any one of claims 1 to 11, The structure is installed on the cashier of the commodity store, the recognition object is a conveyor structure for improving the RFID tag recognition rate, characterized in that the product attached to the electronic tag.

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