KR100302086B1 - How to set recognition parameters automatically for contactless card reader - Google Patents

Abstract

The present invention provides recognition of a contactless card recognition terminal which enables a simple and automatic setup by wireless communication therebetween with software required for a contactless card recognition terminal and a contactless card for setup. A method of automatically setting a variable, the method comprising: (a) preparing a card for setting up a contactless card type storing a setup parameter capable of newly setting a unique identification number and a recognition variable in its own memory; (b) preparing a contactless card recognition terminal equipped with a setup card recognition algorithm capable of recognizing the setup card in its own memory and a reinitialization algorithm performing reinitialization by the provided setup parameters; (c) determining whether a number of occurrences of a card read error under a contactless card recognition mode exceeds a predetermined reference value; (d) If the number of occurrences of the card read error in the step (c) exceeds a predetermined reference value, switch to the setup card recognition mode to receive the identification number from the setup card, and match with the number registered in advance. Confirming whether (e) if the identification number of the setup card is previously registered in step (d), reading setup parameters from the setup card; And (f) performing reinitialization with said setup parameters.

Description

How to set recognition parameters automatically in contactless card reader

The present invention relates to a method for automatically setting recognition parameters of a contactless card recognition terminal.

In general, a contactless card recognition system is an authentication of a cardholder or exchange of necessary data by wireless communication between a card recognition terminal (hereinafter simply referred to as a "terminal") and a contactless card (hereinafter simply referred to as a "CL card"). It refers to a system that enables the system to be used, and is being used in areas such as time and attendance management and access control in a company.

1 is an internal configuration diagram of a general contactless card recognition system. As shown in FIG. 1, the contactless card recognition system is largely comprised of a terminal 10 and a CL card 17. The terminal 10 performs amplitude shift keying on an antenna 16 which radiates and captures a power signal, a data signal, and a clock signal toward the front for contactless wireless communication. , A program memory for storing an operating program of the RF module 12 and the terminal 10 that modulate the radio signal using a modulation method such as frequency shift keying or phase shift keying. 13) through the keyboard 14 and the keyboard 14 including a function selection key for selecting various functions included in the terminal 10 and a data input key used to input data required by the terminal 10. It may include an I / O control unit 13 that controls various input / output operations of the terminal 10 including key input. The CL card 17 captures a power signal, a data signal and a clock signal radiated from the antenna 16 of the terminal 10, and also emits a radio signal related to data, and a semiconductor such as a CPU and a memory. It consists of a card core 19 composed of elements.

However, in such a non-contact card recognition system, the internal elements of the terminal 10 and the terminal 10 such as inductance, material, and shape of the antennas 16 and 18 embedded in the terminal 10 and the CL card 17, respectively. Communication between the terminal 10 and the CL card 17 for non-contact communication depending on the place where) is used and the local installation location there, and the environmental factors of the terminal 10 such as ambient temperature or humidity. Variables can be affected. Therefore, an appropriate communication variable should be set in the state in which the terminal 10 is placed in the setup mode at the time of manufacture, installation, or maintenance of the terminal 10.

2 is a flowchart illustrating a communication parameter setting process of a conventional contactless card recognition terminal. As shown in FIG. 2, in the conventional non-contact card recognition system, a circuit constant of an antenna matching unit (not shown) in the RF module 12 of the terminal 10 may be represented so that the antenna characteristics thereof may be well displayed when the terminal is manufactured. After measuring with a device such as a digital multimeter, the impedance is matched by changing the value of the variable capacitor. After the impedance is matched in this way, the terminal 10 is installed at a necessary place (S10), and then the impedance of the antenna is again matched at the installation place (S11). This is because the impedance matching of the antenna is a very important part that determines the basic performance and reliability of the terminal and is sensitively changed by the structural, positional and environmental characteristics of the installation site.

In this way, after the impedance matching is completed, the terminal 10 is switched to the setup mode by operating a setup dedicated key or an equivalent key (S12). Here, it is assumed that the basic communication parameters of the terminal 10 are shipped with a default state at the time of manufacture. Next, selection is made according to the type of CL card. Conventional terminals are designed to support various types of CL cards that have the same RF power transmission scheme, data encoding / decoding scheme for data communication, and frequency of use, and differ only in their functional characteristics. Therefore, in step S13, the target card is selected using a function selection key, a data input key, or the like. Next, communication parameters are set for the selected card (S14).

That is, when the terminal decodes the data encoded in the CL card, it is determined whether the amplitude (ASK), the phase (PSK), and the frequency (FSK) are recognized as valid data with a certain tolerance according to the encoding scheme. A parameter for determining is set. The parameters that can be set in this step S14 include, for example, the maximum and minimum values of short pulses and long pulses for determining valid data when the amplitude modulated data is encoded in Manchester, and the data block It may include a terminator for the separation between the effective time interval of the division pulse for the data separation. Here, if the parameter to be set belongs to a specific function, the procedure may be simplified so that the parameter to be set for each function can be set after the table of contents. Next, in step S15, it is checked whether setting of all parameters for each function is completed. In other words, it is checked whether the setup mode has been terminated. If the setup mode is not terminated in this step S15, the step S14 is repeated. If the setup mode is terminated, the process proceeds to step S16 to implement the set-up variables as nonvolatile memory or volatile memory. To the backup data memory. After the set parameters are stored in this way, the set parameters are valid by reinitializing the terminal by these parameters.

In the above description, an example of setting parameters using a function selection key or a data input key is given. Alternatively, a dedicated terminal dedicated to setup (hereinafter, simply referred to as a "setup terminal") may be used or set up in a similar manner. After changing the setup data of the terminal using an application program of the terminal, the setup data may be changed by downloading the changed setup data to the terminal through communication.

In addition, the dip switch may be provided inside the terminal to allow the terminal to set up itself upon initialization of the terminal according to the on / off state of the dip switch.

Meanwhile, the terminal may be designed to support both a plurality of frequencies and a plurality of data encoding / decoding methods. In this case, considering the manufacturing cost of the terminal, the incidental cost according to the purpose, the size of the terminal, the antenna manufacturing ability, etc. It can be determined and the invention is not limited to any one use.

As described above, there have been various methods for setting card recognition parameters of a conventional contactless card recognition terminal.

However, in the case of the key input method, there are problems in terms of mechanical, cost, and future after-sales service for using the function selection key and the data input key. It's a hassle to operate the dip switch with the key removed. Also in the method via the setup terminal, a setup procedure is required, a separate application program for enabling setup through the setup terminal, and a confirmation procedure for confirming whether or not the input parameters are set correctly is also required. If is not set correctly there is a problem that takes a long time to reset it.

SUMMARY OF THE INVENTION The present invention has been made to solve the above-mentioned problems, and the setup can be performed simply and automatically by wireless communication therebetween with software required for a terminal and a contactless card for setup. It is an object of the present invention to provide a method for automatically setting recognition parameters of a contactless card recognition terminal.

In order to achieve the above object, a method of automatically setting a recognition variable of a contactless card recognition terminal of the present invention includes: (a) a contactless card storing a unique identification number and a setup parameter for newly setting a unique identification number in its own memory; Preparing a card for setup in a manner; (b) preparing a contactless card recognition terminal equipped with a setup card recognition algorithm capable of recognizing the setup card in its own memory and a reinitialization algorithm performing reinitialization by the provided setup parameters; (c) determining whether a number of occurrences of a card read error under a contactless card recognition mode exceeds a predetermined reference value; (d) If the number of occurrences of the card read error in the step (c) exceeds a predetermined reference value, switch to the setup card recognition mode to receive the identification number from the setup card, and match with the number registered in advance. Confirming whether (e) if the identification number of the setup card is previously registered in step (d), reading setup parameters from the setup card; And (f) performing reinitialization with said setup parameters.

1 is an internal configuration diagram of a general contactless card recognition system;

2 is a flowchart illustrating a communication parameter setting process of a conventional contactless card recognition terminal;

3 is an internal configuration diagram of a contactless card recognition terminal to which the automatic recognition variable setting method according to the present invention is applied;

4 is an internal configuration diagram of a setup card used to execute a method for automatically setting recognition parameters of a contactless card recognition terminal of the present invention;

5 is a detailed structural diagram of a memory unit of FIG. 4;

6 is a flowchart for explaining a method for automatically setting recognition parameters of a contactless card recognition terminal according to the present invention.

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

10: contactless card reader, 11: CPU,

12: RF module, 13: program memory,

14: I / O control, 15: keyboard,

17: contactless card, 18: antenna,

19: card core, 30: contactless card recognition terminal,

31: CPU, 32: RF Module,

33: memory, 33a: operating program,

33b: setup card recognition program, 33c: reinitialization program,

34: I / O control, 35: keyboard,

40: setup card, 41: analog front end,

42: modulator, 43: power on reset,

44: demodulator, 45: CPU

46: high voltage generator, 48: antenna,

50: memory, 51: program memory,

52: read / write memory, 52a: chip ID area,

52b: setup parameter area, 52c: user area

Hereinafter, a method for automatically setting recognition parameters of a contactless card recognition terminal according to a preferred embodiment of the present invention will be described in detail with reference to the accompanying drawings.

3 is an internal configuration diagram of a contactless card recognition terminal to which a method for automatically setting a recognition variable according to the present invention is applied. As shown in FIG. 3, the internal configuration of the terminal to which the automatic recognition variable setting method of the present invention is applied includes an antenna 36 which radiates a power signal, a data signal, and a clock signal toward the front for contactless wireless communication; Various programs used in the RF module 32 and the terminal 30 for modulating a power signal, a data signal, and a clock signal into a wireless signal using a modulation scheme such as amplitude shift modulation, frequency shift modulation, or phase shift modulation are stored. Keyboard 35 and keyboard 35 each having a memory 33, a function selection key for selecting various functions provided in the terminal 30, and a data input key used for inputting data required for the terminal 30; It may be composed of an I / O control unit 34 for controlling various input / output operations of the terminal 30, including the key input through. In the above-described configuration, the general terminal operating program 33a is stored in the memory 33, and the setup card recognition program 33b and the reinitialization program 33c are stored in addition to the present invention.

FIG. 4 is an internal configuration diagram of a setup card used to execute a method for automatically setting recognition parameters of a contactless card recognition terminal of the present invention, and FIG. 5 is a detailed structural diagram of a memory unit of FIG. As shown in Figs. 4 and 5, the internal configuration of the setup card 40 used in the execution of the method for automatically setting the recognition variable of the non-contact card recognition terminal of the present invention is the CPU 45 for controlling the overall operation of the inside of the card. The antenna 48 for radio wave radiation and acquisition, the power-on reset unit 43 for resetting the CPU 45 at power-on, and the data to be transmitted under the control of the CPU 45 and then modulated. The demodulator 44 to demodulate the received data, decode and transmit the demodulator 44 to the CPU 45, and rectify the signals captured by the antenna 48 to generate driving power. ), The modulator 42 and the analog front end unit 41, which interfaces between the antenna 48 and the demodulator 44, and the memory 50 and the memory 50 in which various programs or data are stored. It consists of a high voltage generator 46 for providing a power source for operation.

In the above configuration, the memory 50 is composed of a program memory 51 and a read / write memory 52 in which an operating system inside the setup card 40 is stored. The read / write memory 52 has a chip ID area 52a which is an area in which its own unique identification number (hereinafter simply referred to as "chip ID") is stored, and a setup parameter area 52b which is an area where setup parameters are stored. ) And a user area 52c which is an area where items related to a user are stored. In addition to the read / write memory 52, an encryption program may be stored to prevent a third party from reading the communication contents and the data in the setup card 40.

6 is a flowchart for explaining a method for automatically setting recognition parameters of a contactless card recognition terminal according to the present invention. First, in the method of automatically setting the recognition variable of the terminal according to the present invention, when the setup card 40 approaches the terminal 30, the terminal 30 sets up the setup card through the setup card recognition program 33b mounted therein. After reading the chip ID data in 40, the installer or manager of the terminal 30 recognizes that the terminal 30 is to be set up so that it can recognize a different CL card than before, and the setup stored in the setup card 50. The setup is performed automatically by reading the parameter data and then reinitializing the terminal 30 with this setup parameter data.

More specifically, as shown in FIG. 6, when power is applied to the terminal 30 installed at the installation site of the application field, the terminal is in a standby state for recognizing the CL card (S30). That is, the terminal 30 continuously modulates and outputs a signal to be used as a power source. Accordingly, an electromagnetic field is formed around the terminal 30. If any CL card is placed in the vicinity of the terminal 30 in this state, the power signal is picked up by the antenna and rectified by its analog front end unit to reset the CPU. After this reset, the CL card sends its own ID and header file so that the terminal 30 can recognize itself.

In the state where the terminal 30 is operating in the user card recognition mode, it is determined whether a CL card read error has occurred in step S31. If a CL card read error has occurred in step S31, step S32. It proceeds to and determines whether the number of error occurrences exceeds the predetermined reference value N. If no CL card read error has occurred in step S31 or if the number of error occurrences in step S32 is equal to or less than the reference value N, the process returns to step S30 to wait for the CL card to be recognized. .

On the other hand, when the number of error occurrences in step S32 exceeds the reference value N, the flow advances to step S33 to switch to the mode in which the setup card 40 can be recognized, that is, the setup card recognition mode. In this way, after switching to the setup card recognition mode, the terminal 30 reads the unique chip ID data from the setup card 40 by its own setup card recognition program 33b, and then the chip ID data read in this way is read by the terminal 30. ) Check whether the data matches the preset data (S34). If the chip ID read out from the setup card 40 in step S34 matches the chip ID stored therein, the process proceeds to step S35, that is, the setup parameters stored in the setup card 40, that is, the terminal 30. The parameters required for accessing the CL card to be newly recognized are read from the setup parameter area 52b. Subsequently, it is checked whether or not the data read in this way is valid data, and in the case of valid data, the terminal 30 is reinitialized by the setup parameters read (S36). This reinitialization process is performed by the reinitialization program 33c provided in the terminal 30. After the reinitialization is completed by the above-described process, a message for allowing the installer or the administrator to confirm that the reinitialization is completed is output (S37). After completing the re-initialization and outputting a message indicating this, the terminal 30 reenters the user card recognition mode capable of recognizing the CL card which the installer or the administrator intends to use (S30).

The automatic recognition parameter setting method of the contactless card recognition terminal of the present invention is not limited to the above-described embodiment, and can be modified in various ways within the scope of the technical idea of the present invention.

According to the method for automatically setting the recognition variable of the contactless card recognition terminal of the present invention as described above, the number of keys required for the terminal can be reduced compared to the method using the function selection key and the data input key, thereby reducing the manufacturing cost of the terminal. In addition, it can reduce the incidental cost of product failure and repair after the terminal is shipped.

On the other hand, there is no need to remove the case of the terminal to change the dip switch, such as in the way that the dip switch inside the terminal and the terminal itself set up upon initialization of the terminal according to the on / off state of the dip switch. As a result, there is no need for a dip switch to set up, thereby reducing the manufacturing cost of the terminal.

In addition, even when setting up using the setup terminal or connecting the data communication terminal, the parameter set under the terminal setup program is downloaded to the terminal and compared to the setup method, so that a separate setup terminal or program is not required. You can reduce the cost and equipment.

Claims (2)

(a) preparing a card for setting up as a contactless card type storing a setup parameter for newly setting a unique identification number and recognition variable in its own memory; (b) preparing a contactless card recognition terminal equipped with a setup card recognition algorithm capable of recognizing the setup card in its own memory and a reinitialization algorithm performing reinitialization by the provided setup parameters; (c) determining whether a number of occurrences of a card read error under a contactless card recognition mode exceeds a predetermined reference value; (d) If the number of occurrences of the card read error in the step (c) exceeds a predetermined reference value, switch to the setup card recognition mode to receive the identification number from the setup card, and match with the number registered in advance. Confirming whether (e) if the identification number of the setup card is previously registered in step (d), reading setup parameters from the setup card; And (f) a method for automatically setting recognition parameters of a contactless card recognition terminal, comprising performing reinitialization by the setup parameter. The method according to claim 1, further comprising: (g) displaying the information when the reinitialization is completed in step (f) so as to be known from the outside.