TWI632512B - Anti-collision method between different frequency cards and dual frequency card reader - Google Patents

Abstract

The invention relates to a method for preventing conflicts between different frequency cards and a dual frequency card reader. The method for preventing conflicts between the different frequency cards includes: detecting that the first card is in the card swipe area; while communicating with the first card, detecting that the second card is in the card swipe area, the second card and the first card use different frequencies; And prohibiting the second card from performing a payment transaction. The present invention also provides a dual frequency card reader capable of preventing conflicts between inter-frequency cards. The solution of the invention enables the inter-frequency card to continuously listen to the card-seeking response of another frequency channel during the process of transmitting and receiving data in one frequency channel when the inter-frequency card enters the card-swapping area at the same time, thereby judging whether there is a conflict of the inter-frequency card and discovering When there is a possibility of conflict, it is forbidden to swipe the card at least one card, so that no brushing phenomenon will occur.

Description

Method for preventing conflict between different frequency cards and dual frequency card reader

The present invention relates generally to the field of radio frequency communication, and more particularly to a method for preventing conflicts between inter-frequency cards and a dual-frequency card reader.

At present, credit card consumption has become very common. With the popularity of mobile terminals, electronic payment using mobile terminals has become increasingly active. As a result, many payment technologies for brushing cards and brushing mobile phones have emerged, such as RCC (Range Controlled Communication) technology, Single Wire Protocol (SWP) technology, and traditional near field communication (NFC, Near Field Communication). )technology. The development of these technologies allows users to carry only by carrying cards or mobile terminals without having to carry cash.

Both the limited field communication technology (RCC) and the near field communication (NFC) technology use wireless radio frequency signals to realize information transmission. Among them, the NFC scheme based on the 13.56 MHz frequency band starts early and has applications in many aspects, and based on the 2.4 GHz frequency band. The RCC solution has innate technical advantages, such as strong signal penetration capability and good card distance consistency. It has broad application and development potential in many new business areas, for example, the RF user identification module based on the 2.4 GHz band ( The SIM card is used on a mobile phone to enable the mobile phone to have a wireless payment function such as an electronic wallet. As a result, a number of cards and mobile terminals supporting different payment technologies have emerged.

In order to have various payment technologies and be convenient for users, there are also card readers that match different cards and/or mobile terminals. For example, a dual-band reader with both the 13.56 MHz band and the 2.4 GHz band can read cards based on the 13.56 MHz band or cards based on the 2.4 GHz band. For example, a public transportation card based on the NFC scheme of the 13.56 MHz band can be read, or a mobile phone with a radio frequency SIM card based on the 2.4 GHz band can be read.

In this case, the problem is that the user usually carries more than one card or mobile phone, so when the card is swiped in sequence (for example, when taking public transportation or subway), when the public transportation card and the mobile phone held by the user enter the credit card area at the same time. At the same time, the public transportation card may be swiped on the card reader, and the mobile phone also performs a payment transaction, resulting in repeated card billing, resulting in unnecessary loss of the user. It can be seen that the existing dual-frequency card reader has inherent trading risks, and the inter-frequency card is prone to conflict when entering the card-swapping area at the same time.

There is currently no suitable technology to solve the conflict problem when multiple cards under different frequency schemes are simultaneously performing payment transactions.

In view of the above, the present invention provides a method for preventing conflicts between different frequency cards, which can detect that there are two or even multiple different frequency cards in the card swipe area, and prevent the two or more cards from being repeatedly swiped, thereby causing the user to loss.

Specifically, the technical solution of the present invention is such.

A method for preventing conflicts between different frequency cards, comprising the steps of: (a) detecting that the first card is in the card swipe area; (b) communicating with the first card, detecting that the second card is in the swipe area, the Two cards with the first card The slice uses a different frequency; and (c) prohibits the second card from performing a payment transaction.

In this way, when two cards with different frequencies enter the card swiping area at the same time, the above method can prohibit the payment transaction of the second card while detecting the first card, and avoid the second card when the first card performs the payment transaction. Make a transaction, causing repeated credit card.

Further, the method for preventing conflicts between the inter-frequency cards further comprises: detecting that the second card enters the swipe area within a predetermined time after the second card leaves the card swipe area, prohibiting the second card from performing a payment transaction.

In this way, it is possible to avoid the billing card caused by the second card being re-entered into the card swipe area after leaving the field, and the repeated billing caused thereby.

Further, the method for preventing conflicts between the inter-frequency cards may further include: (d) prohibiting the first card from performing a payment transaction while prohibiting the second card from performing a payment transaction.

In this way, the method for preventing conflicts between the inter-frequency cards of the present invention can simultaneously close the transactions of the first card and the second card, thereby avoiding conflicts between the inter-frequency cards.

Preferably, the first card is a high frequency card, and the second card is an ultra high frequency card or a high frequency card. For example, the first card is based on a 13.56 MHz smart card and the second card is based on a 2.4 GHz smart card. Preferably, the second card is a radio frequency SIM card.

The invention also provides a dual frequency card reader, comprising a first communication module, a second communication module and a main control module, wherein the first communication module is configured to communicate with the first card based on the first frequency; the second communication The module is configured to communicate with the second card based on the second frequency, the second frequency is different from the first frequency; and the master The module is configured to communicate with the first communication module and the second communication module, so that the second card is prohibited from performing a payment transaction when the first card is detected.

Therefore, when the two inter-frequency cards simultaneously enter the swipe area of the dual-frequency card reader, the dual-frequency card reader can detect the first card and prohibit the payment transaction of the second card, thereby preventing the first card from performing the payment transaction. After that, the second card is also traded, causing a second brush.

The first communication module includes a first control module and a first frequency communication module connected to each other, and the first frequency communication module is configured to detect whether the first card enters the card swipe area, and the first control module is in the main control module. Under the control, the payment transaction is realized with the first card.

In this way, the first control module establishes a transmission channel between the main control module and the first frequency communication module, parses the command from the main control module, and performs corresponding actions to transmit data to the first frequency communication module, The data from the first frequency communication module is transmitted to the main control module to implement the payment transaction of the first card, or prohibit the first card from performing the payment transaction.

Further, the second communication module includes a second control module and a second frequency communication module connected to each other, and the second frequency communication module is configured to detect whether the second card enters the card swipe area, and the second control module is in the main control Under the control of the module, a payment transaction is implemented with the second card.

Further, the second frequency communication module comprises a limited domain communication module and a magnetic circuit module, wherein the magnetic circuit module is configured to transmit a magnetic signal to define a card swipe area, and the limited domain communication module communicates with the second card.

Further, the master control module further prohibits the first card from performing a payment transaction.

The first frequency is 13.56 MHz and the second frequency is 2.4 GHz.

Therefore, by using the above-mentioned inter-frequency card anti-collision method and the dual-frequency card reader of the present invention, when the inter-frequency card enters the card-swapping area at the same time, during the process of transmitting and receiving data in one frequency channel, the other frequency channel is continuously monitored. The card search response is used to judge whether there is a conflict of the different frequency card, and when it is found that there is a possibility of conflict, the card transaction of at least one card is prohibited, thereby causing no brushing phenomenon.

Since the card search and transaction between the two communication modules are processed in parallel, one channel listening for the card search response does not affect the transaction data of the other channel, so the card recovery response is fast.

1‧‧‧Master Module

2‧‧‧First Communication Module

3‧‧‧Second communication module

21‧‧‧First Control Module

22‧‧‧13.56MHz RF Communication Module

31‧‧‧Second control module

32‧‧‧2.4GHz limited domain communication module

33‧‧‧Magnetic circuit module

a~c‧‧‧step

S1~S10‧‧‧Steps

The basic principles of the invention will be better understood with reference to the following drawings.

1 is a block diagram showing the structure of a dual frequency card reader according to an embodiment of the present invention.

2 is a flow chart of an inter-frequency card anti-collision method in accordance with the principles of the present invention.

3 is a flow chart of an inter-frequency card anti-collision method in accordance with one embodiment of the present invention.

In order to make the objects, technical solutions, and advantages of the present invention more comprehensible, the specific embodiments of the present invention are described in detail below. The embodiments of the invention illustrated in the drawings and described in the drawings are merely exemplary, and the invention is not limited to the embodiments.

It should be noted that in order to avoid obscuring the original due to unnecessary details. The invention only shows structural and/or processing steps that are closely related to the solution according to the invention, and other details are omitted in the drawings.

In the following, a dual-frequency card reader is taken as an example to describe an anti-collision method between different frequency cards. It will be appreciated that the technical principles of the present invention are not limited to the dual frequency card readers exemplified herein.

According to the principles of the present invention, the dual-frequency card reader includes: a first communication module configured to communicate with the first card based on the first frequency; and a second communication module configured to communicate with the second card based on the second frequency, The second frequency is different from the first frequency; and the main control module is configured to communicate with the first communication module and the second communication module, so that the second card is prohibited from performing a payment transaction when the first card is detected .

In this way, the two communication modules of the dual-frequency card reader form two parallel channels, and under the control of the main control module, the cards of different frequencies are respectively searched for, and when the card search response of the first card is received, , continuously listening for the response from the second card, and prohibiting the second card from performing the payment transaction when the second card is also found to enter the card swipe area, thereby avoiding repeated card swiping.

The following takes a specific dual-frequency card reader as an example to describe the anti-collision scheme between different frequency cards. For example, the dual-frequency card reader enables a smart card in the high-frequency (HF) band (for example, a public transport card conforming to the ISO 14443 (Contactless card standards) protocol) and a VHF Smart cards in the (HF) band (for example, 2.4GHz RF SIM cards conforming to the RCC specification) allow only one card to be swiped during the simultaneous access to the swipe area of the dual-frequency card reader, and even all cards cannot be used. Credit card transactions.

In this embodiment, the dual frequency card reader can read a public transportation card based on 13.56 MHz, or can read a 2.4 GHz based radio frequency SIM card (located in a mobile terminal such as a mobile phone). Therefore, on this dual-frequency card reader, you can either pay by card or pay by mobile phone. Those skilled in the art will appreciate that the dual frequency card reader of the present invention is not limited to the frequencies of 13.56 MHz and 2.4 GHz described herein, and dual frequency readers that read different frequencies in accordance with the principles of the present invention fall within the scope of the present invention. The scope of protection.

Referring to Figure 1, there is shown a block diagram of a dual frequency card reader in accordance with one embodiment of the present invention. As shown in FIG. 1, the dual-frequency card reader comprises a main control module 1, a first communication module 2, and a second communication module 3.

The first communication module 2 can also be referred to as an NFC communication module in this embodiment, which is used for communication with the main control module 1 and detects a public transportation card based on the frequency of 13.56 MHz under the control of the main control module 1. Enter the credit card area, access the public transportation card, and communicate with the public transportation card to achieve credit card payment. The first communication module 2 includes a first control module 21 and a 13.56 MHz radio frequency communication module 22.

The first control module 21 is connected to the main control module 1 and the 13.56 MHz radio frequency communication module 22, and transmits commands and data between the 13.56 MHz radio frequency communication module 22 and the main control module 1, and receives the 13.56 MHz radio frequency communication module. 22 information, parsing the instructions and data from the main control module 1, and performing the corresponding actions.

For example, after the dual-frequency card reader is activated, the main control module 1 issues an automatic card-finding command. After receiving the first control module 21, the 13.56 MHz radio frequency communication module 22 continuously transmits a 13.56 MHz card-seeking command to receive 13.56. The response from the public transportation card detected by the MHz RF communication module 22. Once received In response, the first control module 21 immediately notifies the main control module 1, and the main control module 1 determines whether to access the public transportation card according to the current access card.

If the dual-frequency card reader does not currently access any card, the main control module 1 controls the first control module 21 to enable the 13.56 MHz radio frequency communication module 22 to complete the access process of the public transportation card. Once the access is completed, the first control module 21 enters the transparent transmission mode. The so-called transparent transmission mode is only used as a transmission channel for instructions and/or data, and does not perform any processing on instructions and/or data. In this way, the first control module 21 transparently transmits the APDU command sent by the main control module 1 to the 13.56 MHz radio frequency communication module 22, and receives the response of the public transportation card to the command from the 13.56 MHz radio frequency communication module 22, and transmits the result to the The master module 1 is looped back until the transaction payment process is completed. Here, a detailed description of the payment transaction process is omitted, and the person skilled in the art is aware of the payment transaction process.

If the dual-frequency card reader has access to the card, for example, the radio frequency SIM card in the mobile phone held by the user has been accessed, or the public transportation card of another person has been accessed, and the payment process is being executed, the main control module 1 passes The first control module 21 is controlled to prohibit access of the public transportation card. In this way, when the user's mobile phone first accesses the dual-frequency card reader or is performing a payment transaction, the public transportation card cannot be accessed, and thus the payment transaction cannot be performed, thereby preventing the user from repeatedly swiping the card and the card in the other person. When accessing first, the user's card cannot be accessed, so that multiple users can be swiped at the same time, causing confusion and errors in the dual-frequency card reader.

The 13.56 MHz RF communication module 22 is connected to the first control module 21 for transmitting a card search command at a frequency of 13.56 MHz to receive a public transportation card. The card search response is to access the public transportation card under the control of the first control module 21, that is, to detect whether the public transportation card is in the card swipe area, and access the public transportation card under the control of the first control module 21. It should be noted that after starting the dual-frequency card reader, the 13.56MHz RF communication module 22 will always send a card-seeking instruction to continuously search for cards at certain time intervals.

The second communication module 3 is also referred to as an RCC communication module in this embodiment of the present invention, and is used for communication with the main control module 1 to detect a radio frequency SIM based on 2.4 GHz under the control of the main control module 1. The card enters the card swiping area, accesses the radio frequency SIM card, and communicates with the radio frequency SIM card to implement payment by the mobile phone. The second communication module 3 includes a second control module 31, a 2.4 GHz limited domain communication module 32, and a magnetic circuit module 33.

The second control module 31 is connected to the main control module 1, the 2.4 GHz limited domain communication module 32 and the magnetic circuit module 33, and the main control module 1 and the 2.4 GHz limited domain communication module 32 and the magnetic circuit module 33 The instructions and data are transmitted between the 2.4 GHz limited domain communication module 32 and the magnetic circuit module 33, and the commands and data from the main control module 1 are parsed to perform corresponding actions.

For example, after the dual-frequency card reader is activated, the main control module 1 issues an automatic card-finding command, and after receiving the automatic card-seeking command, the second control module 31 instructs the magnetic circuit module 33 to continuously send a 2.4 GHz card-seeking instruction. And receiving the detected response of the radio frequency SIM card from the 2.4 GHz limited domain communication module 32. Upon receiving the response, the second control module 31 immediately notifies the main control module 1, and the main control module 1 determines whether to access the radio frequency SIM card according to the current access card.

If the dual-frequency card reader does not currently access any card, the main control module 1 connects the 2.4 GHz limited-area communication module 32 by controlling the second control module 31. Enter the RF SIM card. Once the access is completed, the second control module 31 enters the transparent transmission mode, and transparently transmits the Application Protocol Data Unit (APDU) command sent by the main control module 1 to pass the 2.4 GHz limited domain communication module 32. Send it out and receive the response from the RF SIM card, transparently transmit it to the main control module 1, and loop back until the transaction process is completed. Here, a detailed description of the payment transaction process is omitted, and the person skilled in the art is aware of the payment transaction process.

If the dual-frequency card reader has access to the card, for example, the public transportation card held by the user has been accessed, or the card of another person has been accessed, and the payment process is being executed, the main control module 1 controls the second control. The module 31 prohibits the radio frequency SIM card from being accessed. In this way, when the user's public transportation card first accesses the dual-frequency card reader or is conducting a payment transaction, the radio frequency SIM card cannot be accessed, and thus the payment transaction cannot be performed, thereby preventing the user from repeatedly swiping the card. Moreover, when another person's card is first accessed, the user's mobile phone cannot be accessed, so that multiple users can be prevented from swiping at the same time, causing confusion and errors in the dual-frequency card reader.

The 2.4 GHz limited-area communication module 32 is connected to the second control module 31, and receives the card-seeking response of the RF SIM card, providing a 2.4 GHz RF channel between the RF SIM card and the second control module 31, and completing the data communication to realize payment. Or prohibit access and other operations.

The magnetic circuit module 33 is connected to the second control module 31, receives the command and data of the second control module 31, and modulates and transmits the corresponding low frequency magnetic signal for receiving by the 2.4 GHz card in the signal area. The magnetic circuit module 33 continuously transmits a low frequency magnetic field, and the 2.4 GHz card detects the field strength, so that the card is judged according to the field strength. The distance from the magnetic circuit module 33 reaches the limit. It should be noted that after the dual-frequency card reader is activated, the magnetic circuit module 33 always transmits the low-frequency magnetic signal, and continues to search for the card at a certain time interval.

The main control module 1 is the core of the dual-frequency card reader, and is used to control other components to implement the operation of the dual-frequency card reader. The main control module 1 is connected to the first communication module 2 and the second communication module 3 respectively for controlling the operations of the first communication module 2 and the second communication module 3.

As described above, the operations of the first communication module 2 and the second communication module 3 are performed directly or indirectly under the control of the main control module 1. In particular, in the embodiment of the present invention, when the main control module 1 detects the response of the public transportation card through the 13.56 MHz radio frequency communication module 22, the second control module 31 is prohibited from accessing the radio frequency SIM card, thereby prohibiting The RF SIM card performs payment transactions, so that repeated credit card payments can be avoided. Further, the main control module 1 can further prohibit the public transportation card from performing the payment transaction, so that the two cards (the public transportation card and the radio frequency SIM card) cannot implement the card transaction, thereby attracting the user's attention and avoiding the inter-frequency card. The conflict between. Similarly, when the main control module 1 detects the response of the radio frequency SIM card through the 2.4 GHz limited domain communication module 32, the first control module 21 cannot access the public transportation card, thereby prohibiting the public transportation card from performing payment transactions. Therefore, it is possible to avoid the second card payment. Further, the main control module 1 can further prohibit the radio frequency SIM card from performing the card payment, thereby attracting the attention of the user and avoiding conflicts between the inter-frequency cards.

For the channel accessing the corresponding card, the main control module 1 can control the corresponding module (the first communication module 2 or the second communication module 3) as the transparent transmission The channel sends and receives APDU commands to interact with the corresponding cards to implement payment transactions. It can be seen that the main control module 1 can control the first communication module 2, the second communication module 3 to perform card search, access, disconnection, interaction with the corresponding card to perform a series of control operations such as a payment transaction process. The main control module 1 can be a central processing unit or a microprocessor.

A dual frequency card reader in accordance with one embodiment of the present invention has been described above in connection with FIG. A method of inter-frequency card anti-collision according to the present invention, which may include the following steps, will be described below with reference to FIG.

Step a: Detect that the first card is in the card swipe area.

Step b: While communicating with the first card, detecting that the second card is in the card swipe area, the second card uses a different frequency than the first card.

Step c: prohibiting the second card from performing a payment transaction.

In this way, when two cards with different frequencies enter the card swiping area at the same time, the above method can prohibit the payment transaction of the second card while detecting the first card, and avoid the second card when the first card performs the payment transaction. Make a transaction, causing repeated credit card.

Based on the embodiment shown in FIG. 2, the method for preventing conflicts between different frequency cards may further include prohibiting the first card from completing a payment transaction (not shown in FIG. 2).

Further, the method for preventing conflicts between the different frequency cards further includes recording the card number or the identifier of the second card, and prohibiting the second card from entering the card swipe area within a predetermined time after detecting that the second card leaves the card swiping area The second card performs a payment transaction (not shown in Figure 2).

In this way, after the first card is swiped, the second card can be re-entered into the card swipe area within a short time after leaving the card swipe area, and the card is swiped again.

A detailed description will be given below with reference to FIG. 3. 3 is a flow chart of an inter-frequency card anti-collision method in accordance with one embodiment of the present invention. As shown in FIG. 3, when the dual-frequency card reader is used, the following steps are performed while the dual-frequency card reader is activated.

Step S1: The first communication module and the second communication module are caused to transmit respective RF signals for card search to detect whether a card enters the card swipe area.

In the process of starting the dual-frequency card reader, it is always necessary to transmit an RF signal for card search. If the card's response is never received, the dual-frequency card reader continues to perform the card search.

If the response of the public transportation card is received, that is, the 13.56 MHz radio communication module in the first communication module receives the card-seeking response, the process proceeds to step S2.

Step S2: Accessing the public transportation card to establish an NFC transaction process.

It can be understood that in the NFC transaction process, the public transportation card and the main control module of the dual-frequency card reader perform multiple interactions of data and instructions to finally realize payment. In this way, the first control module in the first communication module enters the transparent transmission mode, and then proceeds to step S3.

Step S3: transmitting the APDU via the first communication module.

The main control module of the dual-frequency card reader sends an APDU to the public transportation card via the first communication module. In the process, the second communication module is still detecting the card-seeking response. At this time, if the radio frequency SIM card has a response, that is, it is detected that the radio frequency SIM card also enters the card swipe area, step S4 is performed. If there is no response from the radio frequency SIM card, go directly to step S5.

Step S4: Record the card number or logo of the radio frequency SIM card, but do not access the radio frequency SIM card for the payment transaction, but continue the transaction payment of the public transportation card, that is, proceed to step S5.

Step S5: If there is no response from the radio frequency SIM card, the main control module processes the response data of the public transportation card to the APDU command until the transaction ends.

So far, the left branch of FIG. 3 has been described, that is, the case where the public transportation card first responds to the dual frequency card reader and performs a payment transaction.

For the case where the radio frequency SIM card first responds to the dual frequency card reader, see the right side branch of FIG. After the step S1, if the RF SIM card first has a card seek response, that is, the 2.4 GHz limited domain communication module in the second communication module receives the card search response, the process proceeds to steps S6-S9.

Step S6: Access the radio frequency SIM card to establish an RCC transaction process.

Step S7: transmitting the APDU via the second communication module.

The main control module of the dual-frequency card reader sends an APDU to the radio frequency SIM card via the second communication module. In the process, the first communication module is still listening for the card-seeking response. At this time, if there is a response from the public transportation card, that is, it is detected that the public transportation card also enters the card swipe area, step S8 is performed. If there is no response from the public transportation card, go directly to step S9.

Step S8: Record the card number or logo of the public transportation card, but do not access the public transportation card for the payment transaction, but continue the payment transaction of the radio frequency SIM card, that is, proceed to step S9.

Step S9: If there is no response from the public transportation card, the main control module processes the response data of the radio frequency SIM card to the APDU until the transaction ends.

After the above steps, when the inter-frequency card enters the card swipe area, only one card can be connected to the dual-band card reader to complete the transaction payment.

Further, after the transaction is completed, the dual-frequency card reader also detects that the card entering the card-swapping area leaves the card-swapping area, and then proceeds to step S10.

Step S10: detecting that the card leaves the card swipe area, and detecting the same card entering the card swipe area again within a predetermined time thereafter, the card is no longer accessed. The predetermined time may be, for example, 5 seconds, 10 seconds, or the like. In this way, it can be avoided that the card that has not been paid out is charged after a short time (for example, due to a misoperation or the like) and then enters the card swipe area again, thereby avoiding repeated card swiping by the same user.

For example, when the user uses the public transportation card for payment, the mobile phone also enters the credit card area. The above scheme enables the public transportation card to perform payment, and the mobile phone's radio frequency SIM card does not pay, but the card number or other identification is recorded, and the user swipes the card. After leaving the card swipe area, but for some reason, for example, the user turns back to the card reader, the phone is re-entered into the card swipe area for a short time, so that the card reader receives the card search response of the radio frequency SIM card again in a short time. In this case, step S10 causes the radio frequency SIM card at this time, however, not to be accessed to perform the card payment. Further, the public transportation card will not be charged again by credit card in a short time. Thus, it is possible to avoid repeated charging for the user.

One embodiment of the inter-frequency card anti-collision process is described above with reference to FIG. 3. Another embodiment will be described below. In this embodiment, the difference from FIG. 3 is only that after step S3 and step S7, if receiving The card search response to another card is not as shown in Figure 3. S4 and step S8, but step S11 is executed to prohibit the payment transaction of the two cards. Specifically, if the mobile phone enters the card swipe area and receives the card search response of the radio frequency SIM card in the NFC transaction process, not only the radio frequency SIM card access is prohibited, but also the payment transaction of the public transportation card is terminated. Similarly, in the RCC transaction process, when receiving a card search response of the public transportation card, not only the access of the public transportation card is prohibited, but also the payment of the radio frequency SIM card is terminated. In this way, neither card can perform a payment transaction, so the process ends. Thus, it can be avoided that the two cards are repeatedly credited for billing.

As can be seen from the above description, when two cards based on different frequency schemes enter the card swipe area, the dual frequency card reader according to the present invention can detect the presence of two types of cards and control the card reader to stop at least one of the cards. Transaction, thus avoiding conflicts between multiple inter-frequency cards and solving the trading risks of dual-frequency card readers.

The embodiments described above are intended to explain the objects, technical solutions, and advantageous effects of the present invention. It should be understood that the foregoing description is only illustrative of the embodiments of the present invention and is not intended to limit the scope of the present invention. Any modifications, equivalent substitutions, improvements, etc., made within the spirit and scope of the invention are intended to be included within the scope of the invention.

Claims (10)

A method for preventing conflicts between different frequency cards, the method for preventing conflicts between different frequency cards comprises: starting an inter-frequency card reader, transmitting an RF signal for card search; detecting that the first card is in a card swipe area; communicating with the first card At the same time, detecting that the second card is in the card swipe area, the second card uses a different frequency than the first card; and prohibiting the second card from performing a payment transaction. The method for preventing conflicts between different frequency cards as claimed in claim 1, wherein the method for preventing conflicts between the different frequency cards further comprises detecting that the second card is detected again within a predetermined time after the second card leaves the card swipe area When entering the card swipe area, the second card is prohibited from performing a payment transaction. The method for preventing conflicts between different frequency cards as recited in claim 1 or 2, wherein the method for preventing conflicts between the different frequency cards further comprises prohibiting the first card from performing a payment transaction. The method of preventing conflicts between different frequency cards as recited in claim 1 or 2, wherein the first card is a high frequency based card, and the second card is a card based on an ultra high frequency or a card of a high frequency. A dual frequency card reader, comprising a first communication module, a second communication module and a main control module; the first communication module is configured to communicate with the first card based on the first frequency; and the second communication module is used Based on the second frequency and the second card Communication, the second frequency is different from the first frequency; the main control module is configured to communicate with the first communication module and the second communication module, so that the second card is prohibited when the first card is detected Perform a payment transaction. The dual frequency card reader of claim 5, wherein the first communication module comprises a first control module and a first frequency communication module connected to each other; the first frequency communication module is configured to detect the first Whether the card enters the card swiping area; the first control module implements a payment transaction with the first card or prohibits access to the first card under the control of the main control module. The dual frequency card reader of claim 5 or 6, wherein the second communication module comprises a second control module and a second frequency communication module connected to each other; the second frequency communication module is configured to detect the Whether the second card enters the card swiping area; the second control module implements a payment transaction with the second card or prohibits access to the second card under the control of the main control module. The dual frequency card reader of claim 7, wherein the second frequency communication module comprises a limited domain communication module and a magnetic circuit module; the magnetic circuit module is configured to emit a magnetic signal to define the card area; The limited domain communication module communicates with the second card. The dual frequency card reader as recited in claim 5, wherein the first The second control card prohibits the second card from performing a payment transaction when the second control card detects that the second card enters the card swipe area within a predetermined time period when the second card leaves the card swipe area; the main control module further prohibits the first card Perform a payment transaction. The dual frequency card reader of claim 5, wherein the first frequency is a high frequency and the second frequency is a high frequency or an ultra high frequency.