JP5288868B2 - Non-contact IC card reader - Google Patents

Description

  The present invention relates to a non-contact type IC card reader device that communicates with a non-contact type IC card corresponding to a plurality of communication methods.

  In recent years, contactless IC cards have been widely used as cards used in electronic money settlement and automatic ticket gates, or ID cards for entrance / exit management systems and employee ID cards, and will continue to be used in various fields in the future. Is expected.

  The presence of the non-contact type IC card is confirmed by a polling process executed by the non-contact type IC card reader device. The non-contact type IC card reader device has a transmission antenna, and a card detection signal is continuously transmitted from the transmission antenna. When the non-contact type IC card enters the communication range, the non-contact type IC card is installed in the non-contact type IC card reader device in response to the transmitted card detection signal. Reply to the receiving antenna. Then, the non-contact type IC card reader device confirms its presence by the received response signal.

  A communication standard between such a non-contact type IC card and a non-contact type IC card reader device is defined as an international standard such as ISO14443. According to the communication distance, it is classified into four types of “contact type”, “proximity type”, “neighboring type”, and “remote type”, and among these, in the “proximity type” communication, the transmission / reception frequency is 13.56 MHz. Is used, and the possible communication distance is approximately 10 cm or less. Also, two types of communication methods, “Type A” and “Type B”, are officially defined depending on differences in communication speed and storage capacity, or differences in encoding method and modulation method. In addition, there is “Type C” as an informal communication method.

  By sequentially transmitting a card detection signal for identifying the communication method to the non-contact type IC card having a different communication method as described above, a single non-contact type IC card reader device can be used for the non-contact type IC card. There is known a technique that can cope with reading of the above, and such a technique is disclosed in Patent Document 1, for example.

(Conventional example 1)
FIG. 3 is a block diagram showing an example of the configuration of a conventional non-contact type IC card reader device. The conventional non-contact type IC card reader device 11 includes at least an antenna 14 that transmits or receives radio waves, a transmission / reception circuit 13 that performs transmission / reception processing with the non-contact type IC card 16 via the antenna 14, and a non-contact type. It comprises a control circuit 12 that controls the IC card reader device 11 and communicates with the host device 17.

  Further, the control circuit 12 uses a communication method of the non-contact type IC card 16, for example, “A method” defined by a type A communication method having a transmission / reception frequency of 13.56 MHz, and “B” defined by a type B communication method. The communication system switching unit 15 has a function of switching to one of the communication systems “B system” and “C system” defined by the type C communication system.

  FIG. 4 is a flowchart showing an example of processing executed by a conventional non-contact type IC card reader device. FIG. 4 shows a processing procedure of the non-contact type IC card reader device having the configuration shown in FIG. Hereinafter, a conventional non-contact IC card reader device will be described with reference to FIGS. 3 and 4. FIG.

  The conventional non-contact type IC card reader device 11 can cope with three types of communication methods of “A method”, “B method”, and “C method” when reading the non-contact type IC card 16.

  First, the communication method switching unit 15 selects an arbitrary communication method among the communication methods of the non-contact IC card 16, for example, “A method” in accordance with the control command from the control circuit 12, and sets the communication method to “ Switch to "A system" (step S11).

  Next, the switched communication method “A method” is set as the detection communication method, and a card detection signal of “A method” is transmitted from the antenna 14 via the transmission / reception circuit 13 (step S12).

  Next, when the non-contact type IC card 16 existing within the communication range of the non-contact type IC card reader device 11 is the “A system” (“Yes” in step S13), the non-contact type IC card The response signal from 16 is received via the antenna 14, and is notified to the host device 17 via the transmission / reception circuit 13 (step S14).

  Further, when the non-contact type IC card 16 existing within the communication range of the non-contact type IC card reader device 11 is other than “A type”, or when the non-contact type IC card 16 does not exist (in step S13). In the case of “No”, the communication method switching unit 15 returns to step S11, and the communication method switching unit 15 performs any communication other than the “A method” among the communication methods of the non-contact IC card 16 in accordance with the control command from the control circuit 12. A method, for example, “B method” is selected, and the communication method is switched to “B method” (step S11).

  Next, the switched communication method “B method” is set as the detection communication method, and a “B method” card detection signal is transmitted from the antenna 14 via the transmission / reception circuit 13 (step S12).

  Next, when the non-contact type IC card 16 existing within the communication range of the non-contact type IC card reader device 11 is the “B system” (“Yes” in step S13), the non-contact type IC card The response signal from 16 is received via the antenna 14, and is notified to the host device 17 via the transmission / reception circuit 13 (step S14).

  Further, when the non-contact type IC card 16 existing within the communication range of the non-contact type IC card reader device 11 is other than the “B system”, or when the non-contact type IC card 16 does not exist (in step S13). In the case of “No”, the communication method switching unit 15 returns to step S11, and the communication method switching unit 15 “A method” and “B method” among the communication methods of the non-contact IC card 16 in accordance with the control command from the control circuit 12. Is selected, and in this case, “C system” is selected, and the communication system is switched to “C system” (step S11).

  Next, the switched communication method “C method” is set as the detection communication method, and a “C method” card detection signal is transmitted from the antenna 14 via the transmission / reception circuit 13 (step S12).

  Next, when the non-contact type IC card 16 existing within the communication range of the non-contact type IC card reader device 11 is the “C system” (in the case of “Yes” in step S13), the non-contact type IC card The response signal from 16 is received via the antenna 14, and is notified to the host device 17 via the transmission / reception circuit 13 (step S14).

  Further, when the non-contact type IC card 16 existing within the communication range of the non-contact type IC card reader device 11 is other than “C type”, or when the non-contact type IC card 16 does not exist (in step S13). In the case of “No”, the communication method switching unit 15 returns to step S11, and the communication method switching unit 15 “B method” and “C method” among the communication methods of the non-contact IC card 16 according to the control command from the control circuit 12. Is selected, and in this case, “A method” is selected, and the communication method is switched to “A method” (step S11). Thereafter, the same processing is repeatedly executed.

  FIG. 7 is a diagram illustrating an example of a transmission order of card detection signals when each communication method is equally selected in the polling process by the non-contact type IC card reader device. As shown in FIG. 7, when the communication method switching as described above is executed, transmission of card detection signals of three types of communication methods, that is, “A method”, “B method”, and “C method” are transmitted. The order is “A method” → “B method” → “C method” → “A method” → “B method”... “A method” → “B method” → “C method”.

  At this time, it is assumed that three types of non-contact type IC cards and non-contact type IC card reader devices having different communication methods have executed a total of six communications per unit time, for example. When the breakdown is viewed by communication method, the number of transmissions per unit time of the card detection signals of “A method”, “B method”, and “C method” is two times each. That is, in this case, the number of transmissions of the card detection signal of each communication method transmitted from the antenna of the non-contact type IC card reader device is equal.

  In addition, by sequentially transmitting card detection signals for identifying the communication method to non-contact IC cards with different communication methods, a single non-contact IC card reader device reads the non-contact IC card. Among the devices that can cope with the above, for the purpose of improving the detection efficiency of the non-contact IC card, it is possible to preferentially read the non-contact IC card of the frequently used communication method Has been proposed. Such a technique is disclosed in Patent Document 2, for example.

(Conventional example 2)
FIG. 5 is a block diagram showing an example of the configuration of a conventional non-contact type IC card reader device. The conventional non-contact type IC card reader device 21 includes at least an antenna 24 for transmitting or receiving radio waves, a transmission / reception circuit 23 for performing transmission / reception processing with the non-contact type IC card 26 via the antenna 24, and a non-contact type. It comprises a control circuit 22 that controls the IC card reader device 21 and communicates with the host device 27.

  Further, the control circuit 22 uses a communication method of the non-contact type IC card 26, for example, “A method” defined by a type A communication method having a transmission / reception frequency of 13.56 MHz, and “ The communication system switching unit 25 has a function of switching to one of the communication systems “B system” and “C system” defined by the type C communication system.

  In addition, the control circuit 22 includes a counting unit 28 that counts the number of detection communication methods for each of a plurality of types of communication methods, and a storage unit 29 that stores a count value counted by the counting unit 28. ing.

  FIG. 6 is a flowchart showing an example of processing executed by a conventional non-contact type IC card reader device. FIG. 6 shows a processing procedure of the non-contact type IC card reader device having the configuration shown in FIG. Hereinafter, a conventional non-contact IC card reader device will be described with reference to FIGS.

  The conventional non-contact type IC card reader device 21 can cope with three types of communication methods of “A method”, “B method”, and “C method” when reading the non-contact type IC card 26.

  First, the communication method switching unit 25 selects an arbitrary communication method among the communication methods of the non-contact IC card 26, for example, “A method” in accordance with the control command from the control circuit 22, and sets the communication method to “ Switch to "A system" (step S21).

  Next, the switched communication method “A method” is set as a detection communication method, and a card detection signal of “A method” is transmitted from the antenna 24 via the transmission / reception circuit 23 (step S22).

  Next, when the non-contact type IC card 26 existing within the communication range of the non-contact type IC card reader device 21 is “A type” (“Yes” in step S23), the non-contact type IC card 26 is received via the antenna 24, and is notified to the host device 27 via the transmission / reception circuit 23 (step S24).

  Further, when the non-contact type IC card 26 existing within the communication range of the non-contact type IC card reader device 21 is other than “A type”, or when the non-contact type IC card 26 does not exist (in step S23). In the case of “No”, the communication method switching unit 25 returns to step S 21, and the communication method switching unit 25 performs any communication other than “A method” among the communication methods of the non-contact IC card 26 according to the control command from the control circuit 22. A method, for example, “B method” is selected, and the communication method is switched to “B method” (step S21).

  Thereafter, from step S21 to step S24, the same processing as in the conventional example 1 is repeatedly executed.

  Next, in step S25, the number of times the detection communication method is set for each of the three types of communication methods of the non-contact IC card 26, that is, the “A method”, “B method”, and “C method” is counted. The counter 28 counts and the count value is accumulated and stored in the storage unit 29.

  Next, the control circuit 22 refers to the information of the count value for each communication method stored in the storage unit 29, and determines the priority order when executing Steps S21 to S24. That is, the communication methods are rearranged in the descending order of the number of detected communication methods, and the communication method with the largest number of times is set as the first. And based on this order | rank, it sets so that the card detection signal of an applicable communication system may be transmitted (step S26).

  The information of the count value for each communication method stored in the storage unit 29, that is, the number of detection communication methods per unit time is, for example, 30 times for “A method”, 20 times for “B method”, When “C method” is 10 times, in the order of increasing number of times, that is, in the order of “A method”, “B method”, and “C method”, steps S21 to S23 are executed. Priorities are set. As a result, the opportunity of selecting the communication method by the control circuit 22 is the highest in “A method”, then “B method”, and “C method” is the lowest.

  FIG. 8 is a diagram showing an example of the transmission order of card detection signals when a large number of A methods are selected in the polling process by the non-contact type IC card reader device. In FIG. 8, when the switching of the communication method as described above is executed, the transmission order of the card detection signals of three types of communication methods, that is, “A method”, “B method”, and “C method” is, for example, “ “A method” → “B method” → “A method” → “C method” → “A method” → “B method” → “A method” → “C method” → “A method”.

  At this time, it is assumed that three types of non-contact type IC cards and non-contact type IC card reader devices having different communication methods have executed a total of six communications per unit time, for example. When the breakdown is viewed by communication method, the number of transmissions per unit time of card detection signals of “A method”, “B method”, and “C method” is three times, two times, and Once.

  That is, in this case, the polling process, that is, the communication method used when executing the process from step S21 to step S23 ("A method" in the above example) and the non-contact IC card having a high communication frequency, that is, non-contact It is possible to increase the probability that the non-contact IC card communication method (“A method” in the above example) having the most access to the IC card reader device matches at an early timing. As a result, the detection efficiency of the communication method of the non-contact type IC card having a high communication frequency is improved, and the communication can be started quickly with respect to the non-contact type IC card having a high communication frequency.

JP 2001-143023 A JP 2005-136476 A

  However, in the polling process of the conventional non-contact type IC card reader device described in the conventional example 1, the number of times the card detection signal is transmitted by each communication method is uniform, and therefore the communication method non-contact type with high communication frequency. The card detection signal is transmitted approximately the same number of times per unit time to both the IC card and the non-contact type IC card with a communication method with low communication frequency. As a result, as a whole, there is a problem that the detection efficiency of the communication method with a high communication frequency of the non-contact IC card is deteriorated.

  In addition, when information is exchanged between the non-contact type IC card and the host device executed after receiving the response signal from the non-contact type IC card, communication is interrupted due to an unexpected error, and the non-contact type IC card It is assumed that re-detection is necessary. In this case, although it is clear that the communication method of the non-contact type IC card to be read is the same as the communication method read immediately before, the processing up to that stage must be repeated from the beginning. Therefore, there is a problem that re-detection takes time.

  Further, in the polling process of the conventional non-contact type IC card reader device described in the conventional example 2, it is possible to improve the detection efficiency of the non-contact type IC card having a high communication frequency. However, for a non-contact type IC card with a low communication frequency, the number of times the card detection signal is transmitted per unit time may be extremely reduced. There is a problem that it is worse than the conventional polling process of the non-contact type IC card reader device, that is, the polling process in which the number of times of transmitting the card detection signal by each communication method is equalized.

  The present invention has been made to solve the above-described problems, and the object of the present invention is to perform re-detection even when non-contact IC card needs to be re-detected due to a communication error or the like. It is possible to provide a non-contact type IC card reader device that can reduce the detection efficiency of a non-contact type IC card with a communication method that can reduce the time required for the communication, even if the communication frequency is low There is.

  As a result of various studies, the present inventors have found the following means for solving the above problems. That is, a non-contact type IC card reader device transmits a card detection signal to a non-contact type IC card having a different communication method, performs a polling process for periodically inquiring, and responds to this non-contact type A non-contact IC card reader device having a function of receiving a response signal of an IC card and determining a communication method of the non-contact IC card based on the response signal, which is performed at an arbitrary timing Process, that is, a polling process that is repeatedly executed, a response signal from a corresponding non-contact IC card is received at the time of a polling process executed at a certain time, and communication determined based on the response signal In the polling process executed after the arbitrary timing, the polling process immediately before is set as a detection communication system, That is, the number of transmissions of the card detection signal of the detection communication method determined by the polling process executed at the arbitrary timing is larger than the number of transmissions of the card detection signal of the communication method other than the detection communication method. It has been found that it is effective to perform a setting process and execute this process by a control circuit in the non-contact type IC card reader apparatus.

  At the same time, it is effective that the non-contact type IC card reader device includes a timer circuit and controls the communication with the non-contact type IC card by linking this with the control circuit.

  Specifically, the non-contact type IC card reader device does not receive a response signal from the non-contact type IC card within the time set by the timer circuit, that is, the user who possesses the non-contact type IC card. When the non-contact type IC card reader device does not access the non-contact type IC card reader device for a long time, the card detection corresponding to a plurality of communication methods is detected from the antenna of the non-contact type IC card reader device for the non-contact type IC card having a different communication method. In the polling process for transmitting a signal and periodically inquiring, the number of transmissions of the card detection signal is equal for all communication methods, that is, the number of transmissions of the card detection signal of each communication method transmitted per unit time. However, the processing for setting the number of times to be the same for all communication methods is performed, and this processing is executed by the control circuit. It is preferred.

That is, according to the present invention, a control circuit that controls communication in a plurality of communication systems with a non-contact type IC card, a card detection signal transmission process corresponding to the plurality of communication systems, and the non-contact type IC card A non-contact type IC card reader device including a transmission / reception circuit for receiving a response signal and an antenna for transmitting / receiving the card detection signal and the response signal, and measuring a reception interval time of the response signal, comprising a timer circuit for matching the set time and pre-specified, the control circuit, a communication scheme in response to the card detection signal by the communication-mode switching unit that internally provided, namely switching to detect the communication system and, prior to the polling process of detecting the presence or absence of the response signal of the serial non-contact IC card performed in any timing, further higher presence of the response signal Location, for example, the non-contact IC card reader personal computer is preset external to, or the notifies the contactless IC card reader microprocessor or the like which is provided inside the, the arbitrary timing or later when performing the pre-Symbol polling process, the number of transmissions of the card detection signal in the detection communication system, whether to perform a process of setting to be larger than the number of transmissions other than the detection communication system, or the set time When the response signal is not received within the range, a non-contact type IC card reader device configured to perform processing for setting the number of transmissions of the card detection signal to be equal for all communication methods is obtained. It is done.

  As described above, the present invention has the above-described configuration, for example, when communication is interrupted due to a communication error, information exchange with a host device is not normally performed, and re-detection of a non-contact IC card is necessary. Even in the polling process immediately after the error occurs, by sending more card detection signals of the same communication method as the non-contact IC card read immediately before the error occurrence than the card detection signals of other communication methods The time required for redetection of the contactless IC card can be shortened.

  Furthermore, when a response signal from a non-contact type IC card is not received within the time set by the timer circuit linked to the control circuit, a non-contact type IC card reader is used for a non-contact type IC card having a different communication method. In the polling process that sends card detection signals corresponding to multiple communication methods from the antenna of the device and periodically inquires, the number of card detection signal transmissions is set to be equal for all communication methods. Thus, even in a non-contact type IC card with a communication method having a low communication frequency, it is possible to suppress a decrease in detection efficiency.

  Hereinafter, embodiments of the present invention will be described in detail with reference to the drawings.

  FIG. 1 is a block diagram showing an example of the configuration of a non-contact type IC card reader device according to an embodiment of the present invention. The non-contact type IC card reader device 1 according to the present invention includes at least an antenna 4 for transmitting or receiving radio waves, a transmission / reception circuit 3 for performing transmission / reception processing with the non-contact type IC card 6 via the antenna 4, and a reception A timer circuit 7 that measures the reception interval time of the received response signal and compares it with a preset set time, a control circuit 2 that controls the non-contact IC card reader device 1 and communicates with the host device 8; It is composed of

  Further, the control circuit 2 includes a communication system switching unit 5 having a function of switching a communication system of a card detection signal transmitted when executing a polling process for periodically inquiring. The communication system switching unit 5 is a communication system of the non-contact type IC card 6, for example, “A system” defined by a type A communication system having a transmission / reception frequency of 13.56 MHz, and “ It has a function of switching to any one of the three communication methods of “B method” and “C method” defined by the type C communication method.

  FIG. 2 is a flowchart showing an example of processing executed by the non-contact type IC card reader device according to the embodiment of the present invention. FIG. 2 shows a processing procedure of the non-contact type IC card reader device 1 having the configuration shown in FIG. Hereinafter, the non-contact type IC card reader device of the present invention will be described with reference to FIG. 1 and FIG.

  The non-contact type IC card reader device 1 of the present invention can cope with three types of communication methods of “A method”, “B method”, and “C method” when reading the non-contact type IC card 6.

  First, the communication method switching unit 5 selects an arbitrary communication method among the communication methods of the non-contact type IC card 6, for example, “A method” in accordance with the control command from the control circuit 2, and sets the communication method to “ Switch to "A system" (step S1).

  Next, the switched communication method “A method” is set as the detection communication method, and the card detection signal of “A method” is transmitted from the antenna 4 via the transmission / reception circuit 3 (step S2).

  Next, when the non-contact type IC card 6 existing within the communication range of the non-contact type IC card reader device 1 is the “A system” (“Yes” in step S3), the non-contact type IC card The response signal from 6 is received via the antenna 4 and is notified to the host device 8 via the transmission / reception circuit 3 (step S4).

  Next, the detected communication method determined based on the response signal received at the time of the polling process executed at any timing executed in steps S1 to S3, that is, the “A system” in this case is changed in the subsequent polling process. It sets so that it may become the communication system selected most among the communication systems selected (step S5).

  In the polling process by the non-contact type IC card reader device 1 of the present invention, the detection communication method of the non-contact type IC card 6 read immediately before, that is, the “A method” in this case is the communication method that is selected most frequently. When the card detection signal is set to three, the transmission order of the card detection signals of the three types of communication methods, that is, “A method”, “B method”, and “C method” is, for example, “A method” → “A method” → “B method” → “A method” → “A method” → “C method” → “A method” → “B method” → “C method”.

  At this time, it is assumed that three types of non-contact type IC cards and non-contact type IC card reader devices having different communication methods have executed a total of six communications per unit time, for example. When the breakdown is viewed by communication method, the number of transmissions per unit time of card detection signals of “A method”, “B method”, and “C method” is three times, two times, and Once. That is, in this case, the “A method” is the largest number of transmissions of the card detection signal transmitted from the antenna 4 of the non-contact type IC card reader device 1.

  Next, returning to step S1, the above-described processing is repeatedly executed.

  On the other hand, if it is determined in step S3 that the non-contact type IC card 6 existing within the communication range of the non-contact type IC card reader device 1 is other than “A type”, or the non-contact type IC card 6 does not exist. If so ("No" in step S3), the process proceeds to step S6 and a timer is started. The timer measures the reception interval time of the received response signal and compares it with a preset set time.

  After the timer of step S6 is started, in the determination of step S7, when the set time has elapsed (in the case of “Yes” in step S7), the control circuit 2 is set so that the respective communication methods are selected equally. To do. That is, in the polling process for periodically inquiring, the number of transmissions of the card detection signal is equal for all communication methods, that is, the number of transmissions of the card detection signal of each communication method transmitted per unit time is all The communication method is set to be almost the same number of times.

  That is, the transmission order of the card detection signals of the three types of communication methods, that is, “A method”, “B method”, and “C method” is, for example, “A method” → “B method” as shown in FIG. ”→“ C method ”→“ A method ”→“ B method ”...“ A method ”→“ B method ”→“ C method ”.

  At this time, it is assumed that the three types of non-contact type IC cards 6 and the non-contact type IC card reader device 1 having different communication methods perform, for example, a total of six communications per unit time. When the breakdown is viewed by communication method, the number of transmissions per unit time of the card detection signals of “A method”, “B method”, and “C method” is two times each. In other words, in this case, the number of transmissions of the card detection signal of each communication method transmitted from the antenna 4 of the non-contact type IC card reader device 1 is equal.

  Next, returning to step S1, the above-described processing is repeatedly executed.

  If it is determined in step S7 that the set time has not elapsed ("No" in step S7), the process returns to step S5 and the above-described processing is repeatedly executed.

  Hereinafter, embodiments of the present invention will be described in detail using examples. However, the embodiment described below is a case where a non-contact type IC card reader device having the configuration shown in FIG. 1 and executing processing according to the flowchart shown in FIG. 2 is used.

Example 1
The non-contact type IC card reader device conforms to ISO 14443 and has a transmission / reception frequency of 13.56 MHz, “A method” defined by the type A communication method and “B method” defined by the type B communication method. , And the “C method” defined in the type C communication method. A total of 30 non-contact type IC cards for each communication method were prepared. One non-contact IC card was randomly selected from these, and this was held over the card detection surface in which the antenna of the non-contact IC card reader device was installed, and the reading process was executed. After the reading process of the first sheet was completed, the reading process was performed from the second sheet to the thirty sheet in the same manner. However, the processing interval of the nth sheet and the (n + 1) th sheet is not constant but is an arbitrary time.

  In addition, the transmission order of the card detection signal of each communication method in the polling process at the start is set so that each communication method becomes equal.

  In addition, a timer was set so as to execute the designated process ten seconds after receiving the response signal of the nth non-contact IC card.

  In addition, after the polling processing by the non-contact type IC card reader device, there is a response from the non-contact type IC card, and when the response signal is notified to the host device, a communication error occurs multiple times at an arbitrary timing. The control circuit was adjusted in advance.

  Under the above-mentioned conditions, a non-contact type IC card reading process was executed.

  When reading the n-th non-contact IC card, the non-contact IC card reader device receives a response signal whose communication method is “A method” from the non-contact IC card, and sends the response signal to the host device. An attempt was made to notify, but an error occurred and communication was interrupted. The non-contact type IC card reader device indicated that there was a communication error by turning on an error display lamp provided in the non-contact type IC card reader device.

  At this time, the control circuit of the non-contact type IC card reader device detects the card detection signal so that the detection communication method of the non-contact type IC card read immediately before, that is, the “A method” is the communication method most frequently selected. The transmission order of was changed.

  The n-th non-contact type IC card held over the antenna part provided in the non-contact type IC card reader device is re-detected after about 10 milliseconds, and the processing is executed normally. It was done.

(Example 2)
Reading processing was performed using a non-contact type IC card reader device capable of supporting the same three types of communication methods as in Example 1 and thirty non-contact type IC cards.

  In addition, the transmission order of the card detection signal of each communication method in the polling process at the start is set so that “A method” is the most frequently selected communication method.

  In addition, a timer was set so as to execute the designated process 60 seconds after receiving the response signal of the m-th non-contact IC card.

  Under the above-mentioned conditions, a non-contact type IC card reading process was executed.

  It is assumed that the access to the non-contact type IC card reader device is not executed for about three minutes after the completion of reading the m-th non-contact type IC card.

  At this time, the control circuit of the non-contact type IC card reader device recognizes that the elapsed time set by the timer, that is, that 60 seconds have elapsed since the response signal of the m-th non-contact type IC card is received. The transmission order of the card detection signals of each communication method in the subsequent polling process is set so that each communication method becomes equal.

  As a result, the time required to detect the (m + 1) th and subsequent non-contact IC cards is almost equal regardless of the type of communication method.

  As mentioned above, although embodiment of this invention was described using the Example, the communication system used with the non-contact-type IC card reader apparatus of this invention is "A system" whose transmission / reception frequency is 13.56 MHz, The present invention is not limited to the three types of “B method” and “C method”, and other than these, or even when four or more types including these are used, they are included in the non-contact type IC card reader device of the present invention. That is, various changes and modifications that can be naturally made by those skilled in the art are also included in the present invention.

The block diagram which shows an example of a structure of the non-contact-type IC card reader apparatus which concerns on embodiment of this invention. The flowchart which shows an example of the process which the non-contact-type IC card reader apparatus which concerns on embodiment of this invention performs. The block diagram which shows an example of a structure of the conventional non-contact-type IC card reader apparatus. The flowchart which shows an example of the process which the conventional non-contact-type IC card reader apparatus performs. The block diagram which shows an example of a structure of the conventional non-contact-type IC card reader apparatus. The flowchart which shows an example of the process which the conventional non-contact-type IC card reader apparatus performs. The figure which shows an example of the transmission order of a card | curd detection signal when each communication system is selected equally in the polling process by a non-contact-type IC card reader apparatus. The figure which shows an example of the transmission order of a card | curd detection signal when many A systems are selected in the polling process by a non-contact-type IC card reader apparatus.

Explanation of symbols

1, 11, 21 Non-contact IC card reader device 2, 12, 22 Control circuit 3, 13, 23 Transmission / reception circuit 4, 14, 24 Antenna 5, 15, 25 Communication system switching unit 6, 16, 26 Non-contact IC Card 7 Timer circuits 8, 17, 27 Host device 28 Counting unit 29 Storage unit

Claims (1)

A control circuit that controls communication in a plurality of communication systems with a non-contact type IC card, a card detection signal transmission process corresponding to the plurality of communication systems, and a response signal reception process from the non-contact type IC card A non-contact IC card reader device comprising a transmission / reception circuit and an antenna for transmitting / receiving the card detection signal and the response signal,
A timer circuit that measures the reception interval time of the response signal and compares it with a preset time specified in advance,
Wherein the control circuit, the inner by setting the communication-mode switching unit to the switch to detect the communication scheme in response to the card detection signal, before Symbol contactless polling process of any of detecting the presence or absence of the response signal of the IC card Run at the timing ,
When performing the pre-Symbol polling process to the arbitrary timing or later, the number of transmissions of the card detection signal in the detection communication system, the process of setting to be larger than the number of transmissions other than the detection communication system Or when the response signal is not received within the set time range, the number of transmissions of the card detection signal is set to be equal for all communication methods. A non-contact type IC card reader device.

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