KR101107005B1 - Rfid tag data input method and rfid reader using the same - Google Patents

Abstract

PURPOSE: A method for inputting RFID tag data to an application program and RFID reader using the same are provided to easily input RFID tag data to application and system programs through a keyboard event method without using API(Application Programming Interface). CONSTITUTION: An RFID(Radio Frequency ID) reader chip(110) reads tag data from an RFID tag. An input unit(140) receives the operation of a user. A display unit(150) displays an application program. If a trigger button(142) is inputted after keyboard daemon, an application or a system program, a microcomputer(130) controls the RFID reader chip and reads out tag data. The microcomputer transfers the application program to a keyboard event scheme and converts tag data into a keyboard signal.

Description

How to input RDF tag data into application and RDF reader using it {RFID TAG DATA INPUT METHOD AND RFID READER USING THE SAME}

The present invention relates to a method of inputting RFID tag data into an application program, and more particularly, it is possible to easily input RFID tag data to all application programs and system programs using a keyboard event method without using an application programming interface (API). It relates to an input method and an RFID reader using the same.

In general, RFID (Radio Frequency Identification) system is a technology that automatically recognizes the data stored in a tag, label, card, etc., a microchip embedded in a reader using a radio frequency. The RFID system has received much attention as an automatic recognition system to replace the barcode in that it has an excellent storage capacity and a contactless advantage compared to the barcode used in the logistics and distribution fields. Recently, RFID systems are used in transportation fee payment systems, livestock management, and medical fields.

In general, as shown in FIG. 1, the RFID system includes an RFID tag 10 and an RFID reader 20. The RFID reader 20 includes various RFID applications and system programs along with an operating system (O / S). It is mounted. The tag data read by the RFID reader 20 from the RFID tag 10 is transmitted through dedicated API programs 40-1 and 40-2 that are connected to the corresponding RFID application programs 30-1 and 30-2. That is, in the related art, in order for the web application 30-1 and the C / S (client-server) program 30-2 to read RFID data in the RFID reader 20, program developers may use APIs for each reader model (40-). 1,40-2) had to be directly interfaced to the application (30-1,30-2).

Therefore, in the past, it is necessary to develop an API according to a reader model or an application program, and when the reader model is changed, a new API development is required, and a system program provided by an operating system (O / S) such as a memo pad or a web browser. There is a problem that can not pass data.

The present invention has been proposed to solve the above problems, and an object of the present invention is a method for inputting RFID tag data to all application programs and system programs using a keyboard event method without using an API, and an RFID reader using the same. To provide.

In order to achieve the above object, an apparatus of the present invention includes an RFID reader chip for reading tag data from an RFID tag; An input unit for receiving a user's manipulation; A display unit for displaying an operation state and an executed application program; Trigger button; And after executing the keyboard daemon according to the operation of the input unit and then executing the application program or the system program, if the trigger button is input, the RFID reader chip is controlled to read tag data and convert tag data into a keyboard signal. It is characterized by consisting of a microcomputer to deliver to the application program or system program in the event manner and to display on the display.

The keyboard daemon includes tag data input means for receiving the tag data, conversion means for converting the input tag data into a keyboard signal, and transmission means for transferring the converted keyboard signal to an input module of an application program. do.

In addition, the method of the present invention to achieve the above object, the step of running a keyboard daemon; Executing an application program in a state in which the keyboard daemon is executed; When the trigger button is input, the keyboard daemon requesting tag data from an RFID reader chip; Converting the tag data into a keyboard signal when tag data is transmitted from the RFID reader chip; Transmitting the converted keyboard signal to an application program; And displaying the data inputted in the input window by the corresponding application program to deliver the tag data to the application program in a keyboard event method without an application program interface (API).

The method of transmitting the keyboard signal to the corresponding application program generates an interrupt and transfers the converted keyboard signal to the input window of the application program, and the keyboard daemon requests tag data from the RFID reader chip when a specific key is input. ; Converting the tag data into a corresponding keyboard signal when the tag data is input; And transmitting the converted keyboard signal to an input window of an application program.

According to the present invention, even if the reader model is changed or the application program is changed, there is no need to develop an API separately, and RFID tag data can be automatically inputted easily to all application programs such as a system program without an API for the RFID reader.

According to the present invention, RFID tag data can be automatically input to any application or system program capable of keyboard input, and the input contents can be displayed on the input window of the corresponding application program or system program. .

1 is a schematic diagram illustrating a concept of inputting RFID tag data into an application program through an API according to a conventional method;
2 is a schematic diagram illustrating a concept of inputting RFID tag data into an application program by a keyboard event method according to the present invention;
3 is a block diagram showing an RFID reader according to the present invention;
4 is a software hierarchy diagram of an RFID reader according to the present invention;
5 is a flowchart illustrating a procedure for inputting RFID tag data into an application program by a keyboard event method according to the present invention;
6A through 6F are schematic diagrams for describing an operation according to an exemplary embodiment of the present invention.

The technical problems achieved by the present invention and the practice of the present invention will be more clearly understood by the preferred embodiments of the present invention described below. The following examples are merely illustrative of the present invention and are not intended to limit the scope of the present invention.

Typically, the communication frequency between the RFID tag and the RFID reader in the RFID system is 125KHz, 13.56MHz, 860-960MHz, 2.45GHz, etc., the radio access protocol for these frequencies is defined in the ISO / IEC 18000 standard. The wireless connection method of RFID tag and RFID reader can be divided into mutual induction method and electromagnetic wave method. The mutual induction method is mainly used for short distance using coil antenna, and the electromagnetic wave method is mainly used for medium to long distance using high frequency antenna. Used. Most of the mutually inductive RFID tags are passive, which receives the energy required to operate the IC chip of the tag from the RFID reader. Active tags use their own power sources such as batteries. For convenience of understanding, an embodiment of the present invention will be described taking an example of an RFID system adopting the ISO / IEC 18000-6 Type C standard and the EPC Class 1 Gen2 standard method of the UHF band which is most widely used in an RFID system.

2 is a schematic diagram illustrating a concept of inputting RFID tag data into an application program by a keyboard event method according to the present invention.

2, the RFID reader 100 according to the present invention is equipped with a keyboard daemon program 180 for processing a keyboard event according to the present invention, the RFID reader 100 read from the RFID tag 10 The tag data is driven by the keyboard daemon 180 to be transmitted to the application programs 30-1 and 30-2 or the system program 30-3 by the keyboard input method. Therefore, according to the present invention, tag data can be delivered to all programs such as the web application 30-1, the C / S program 30-2, the system program 30-3, and the like as a keyboard input method to develop a separate API. You don't need to, and you can just type it in other newly loaded applications.

3 is a block diagram illustrating an RFID system employing an RFID reader according to the present invention, and FIG. 4 is a software hierarchy diagram of the RFID reader according to the present invention.

As shown in FIG. 2, the RFID system to which the present invention is applied includes an RFID tag 10, an RFID reader 100, and an application server 20. The RFID tag 10 includes a tag antenna 11, The power unit 15 for supplying the power required by the tag chip with the induced energy through the tag antenna 11, the memory 14 storing data in a predetermined format, and the control of the tag controller 13 The modulation and demodulation unit 12 modulates the transmission data according to the ASK method and responds to the reader through the tag antenna 11, demodulates the ASK signal received through the tag antenna 11, and transmits the data to the tag controller 13. The tag controller 13 is configured to interpret a command received from the RFID reader 100 to write data to the memory 14 or to transmit data read from the memory 14 to the reader and to control the overall operation.

The RFID reader 100 according to the present invention includes an RFID reader chip 110 including a reader antenna 102, a modulation / demodulation unit 112, and a reader controller 114, a power supply unit 120, a key input unit 140, and a trigger button. 142, the LCD 150, the host interface 160, and the keyboard daemon 180, and then the application programs 30-1 and 30-2 or the system program 30-3 are executed, and the trigger button ( When the 142 is input, the RFID reader chip 110 is controlled to read the RFID tag data, convert the tag data into a keyboard signal, and transfer the tag data to a corresponding application program or system program in a keyboard event method to be displayed on the LCD 150. The MCU 130 is configured.

In addition, the RFID reader 100 according to the present invention, as shown in Figure 4, the RFID reader driver 172 for driving the RFID reader chip 110 to read the tag data from the RFID tag 10, and the operating system (170; O / S), driven under the control of the operating system 170 to convert the tag data of the driver 172 into a keyboard signal to the keyboard application method for the corresponding application (30-1 ~ 30-N) The keyboard daemon 180 and various application programs 30-1 to 30 -N to be delivered are mounted.

The application server 20 provides a unique service according to a system design purpose, such as a service for managing logistics using an RFID system. In the case of a small-scale application, the application server 20 may be integrally implemented with the reader 100 or a reader ( 100) and a standalone computer (PC) system connected via a USB method or a web server connected through a network.

5 is a flowchart illustrating a procedure for inputting RFID tag data to an application program in a keyboard event method according to the present invention, and FIGS. 6A to 6F are schematic diagrams for describing an operation according to an exemplary embodiment of the present invention.

First, the RFID reader 100 undergoes a Select, Inventory, and Access process in order to identify the RFID tag 10 and give a command to a specific tag. Select is a step in which the reader selects a specific tag group for inventory and access. The selected flag (SL) setting value of the tag is selected by a select command of the RFID reader 100. This is different. Inventory is a step of identifying a tag. The RFID reader 100 selects one of four sessions of the tag 10 and sends a query command to start an inventory round. One or more tags respond in response. The RFID reader 100 discovers the response of the specific tag 10 and requests the tag 10 for a protocol control (PC), an electronic product code (EPC), and a cyclic redundancy check (CRC). Inventory consists of Query, QueryAdjust, QueryRep, ACK, and NAK commands, and the inventory round runs only in one session at a time. The access is a step of giving a read / write command to the tag 10. The access includes Req_RN, Read, Write, Kill, Lock, Access, BlockWrite, and BlockErase commands.

RFID tag 10 is ready, arbitrated, responded, acknowledged, open, secured, killed, etc. for multiple access and memory access. Has The tag 10 within the recognition range of the RFID reader 100 is supplied with a predetermined power and is in a ready state. The RFID reader 100 performs a select and inventory operation for tag recognition. The RFID reader 100 prepares for selecting and recognizing the RFID tag 10 using the tag memory value in a select operation.

Referring to FIG. 5, the RFID reader 100 executes the keyboard daemon program 180 according to the present invention (S101). After checking the execution of the daemon, the application programs 30-1 to 30-N are executed, and the focus is placed on the input window of the application programs 30-1 to 30-N (S102 to S104).

Thereafter, when the trigger button 142 on the left side of the terminal is operated, the RFID reader 100 reads tag data from the RFID tag 10 according to the reader-to-tag communication procedure described above and uses the read tag data as a keyboard signal. The data is converted (S105 to S107).

The keyboard daemon 180 generates a keyboard event as if there is a key input, and transfers the converted keyboard data to the corresponding applications 30-1 to 30 -N, and accordingly the corresponding application 30-30 to 30. -N) displays tag data input in the input window (S108, S109).

For example, a procedure of inputting RFID tag data into an MS word pad as a system application program will be described with reference to FIGS. 6A to 6F.

Referring to FIG. 6A, the RFID reader 100 executes the keyboard daemon program 180 according to the present invention, checks the execution of the daemon, and executes MS WordPad as shown in FIG. 6C. 6d, the tag data is read by the RFID reader 100 by pressing the trigger button 142 as shown in FIG. 6e while the input window of the wordpad is focused, and the tag data is converted into a keyboard signal and transmitted to the application program. Accordingly, the memo pad displays the input tag data in the input window as shown in FIG. 6F.

The present invention has been described above with reference to one embodiment shown in the drawings, but those skilled in the art will understand that various modifications and equivalent other embodiments are possible therefrom.

10: RFID Tag 100: RFID Reader
30-1 ~ 30-N: Application 170: Operating System
172: RFID reader driver 180: keyboard daemon

Claims (5)

An RFID reader chip for reading tag data from an RFID tag;
An input unit for receiving a user's manipulation;
A display unit for displaying an operation state and an executed application program;
Trigger button; And
After executing the keyboard daemon according to the operation of the input unit, if the trigger button is input after the application program or the system program is executed, the RFID reader chip is controlled to read tag data, and the tag data is converted into a keyboard signal and then the keyboard RFID reader using the method for inputting the RFID tag data to the application program, characterized in that consisting of a microcomputer to be delivered to the application or system program in the event method and displayed on the display. The method of claim 1, wherein the keyboard daemon is
Tag data input means for receiving the tag data;
Conversion means for converting the input tag data into a keyboard signal;
RFID reader using the method for inputting the RFID tag data to the application program, characterized in that it comprises a transmission means for transmitting the converted keyboard signal to the input module of the application program. Running a keyboard daemon;
Executing an application program in a state in which the keyboard daemon is executed;
When the trigger button is input, the keyboard daemon requesting tag data from an RFID reader chip;
Converting the tag data into a keyboard signal when tag data is transmitted from the RFID reader chip;
Transmitting the converted keyboard signal to an application program; And
And displaying the data entered in the input window by the corresponding application.
A method for inputting RFID tag data into an application, characterized by delivering the tag data to an application in a keyboard event manner without an application program interface (API). The method of claim 3, wherein the keyboard signal is transmitted to the corresponding application program.
A method of inputting RFID tag data into an application, characterized in that to generate an interrupt and transfer the converted keyboard signal to the input window of the application. The method of claim 3, wherein the keyboard daemon is
Requesting tag data from an RFID reader chip when a specific key is input;
Converting the input tag data into a corresponding keyboard signal when the tag data is input; And
And transmitting the converted keyboard signal to an input window of an application program.

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