Information identification method and access control card reader

Abstract

This application discloses an information identification method and an access control card reader. The method is applied to an access control card reader, which includes a magnet and a coil. The area enclosed by the coil includes the information reading area of ​​the access control card reader. The magnetic field lines of the magnet pass through the information reading area, and the direction of the magnetic field lines passing through the information reading area is not parallel to the plane where the information reading area is located. The method includes: when an object approaches the information reading area of ​​the access control card reader, detecting electromagnetic induction data in the coil; and distinguishing the object from a physical access control card or an abnormal electronic device based on the electromagnetic induction data. The abnormal electronic device is an electronic device capable of copying information from a physical access control card. This solution can accurately distinguish between physical access control cards and abnormal electronic devices when both contain information and can be identified by the access control card reader, thus solving the problem that successful verification of abnormal electronic devices affects security.

Description

Technical Field

[0001] This application relates to the field of access control security technology, and in particular to an information identification method and an access control card reader. Background Technology

[0002] Access control card readers are a crucial component of access control systems. They emit electromagnetic waves at a fixed frequency. When a proximity card enters the reader's electromagnetic radiation range, it triggers a coil on the card, generating a current that activates the card's antenna to transmit a signal to the reader. This signal carries card information, which is then compared to a database to retrieve the complete card information. Proximity cards are typically contactless IC cards, embedded with a microprocessor and memory to store data. Currently, many electronic devices incorporate cards with short-range wireless communication capabilities, such as NFC and MiFARE cards. These cards are also capable of copying information, including the information on the proximity card. If an electronic device with copied proximity card information approaches the access control card reader, the reader can read and verify the information, posing a security threat to the area.

[0003] Currently, the solution to the above problems is to verify the physical card number of the proximity card, and then verify the dynamic password after successful verification. The dynamic password is updated in real time. However, electronic devices that have copied information cannot update the dynamic password in real time. However, proximity cards have a limited number of read / write cycles, and updating the dynamic password with each verification affects the lifespan of the proximity card. Furthermore, not all proximity cards support card writing functionality, and if the dynamic password cannot be updated, there is still a risk of information being copied. In addition, the card writing operations are inconsistent for different types of proximity cards, making it difficult to achieve compatibility when writing dynamic passwords. Summary of the Invention

[0004] This application provides an information identification method and an access control card reader, which can efficiently and cost-effectively distinguish between physical access control cards and abnormal electronic devices without improving current proximity cards, thereby improving the verification reliability of the access control card reader.

[0005] According to one aspect of this application, an information identification method is provided, applied to an access control card reader, the access control card reader including a magnet and a coil, the area enclosed by the coil comprising an information reading area of ​​the access control card reader, the magnetic field lines of the magnet passing through the information reading area, and the direction in which the magnetic field lines pass through the information reading area is not parallel to the plane in which the information reading area is located; the method includes:

[0006] When an object approaches the information reading area of ​​the access control card reader, electromagnetic induction data in the coil is detected; wherein, the electromagnetic induction data includes induced voltage and / or induced current;

[0007] The electromagnetic induction data distinguishes whether the item is a physical access card or an abnormal electronic device; wherein, the abnormal electronic device is an electronic device capable of copying information from a physical access card; the physical access card and the abnormal electronic device have different effects on the magnetic flux passing through the coil when they are brought close to the information reading area.

[0008] According to one aspect of this application, an access control card reader is provided, the access control card reader comprising:

[0009] A magnet is disposed inside the access control card reader, and the magnetic field lines of the magnet pass through the information reading area of ​​the access control card reader; the direction in which the magnetic field lines pass through the information reading area is not parallel to the plane in which the information reading area is located.

[0010] A coil is installed inside the access control card reader, and the area enclosed by the coil includes the information reading area.

[0011] At least one processor; and,

[0012] The memory is connected to the at least one processor for data processing; wherein,

[0013] The memory stores a computer program that can be executed by the at least one processor, which enables the at least one processor to perform the information recognition method in any of the above embodiments.

[0014] The technical solution of this application embodiment is applied to an access control card reader. The access control card reader includes a magnet and a coil. The area enclosed by the coil includes the information reading area of ​​the access control card reader. The magnetic field lines of the magnet pass through the information reading area, and the direction in which the magnetic field lines pass through the information reading area is not parallel to the plane where the information reading area is located. The method includes: when an object is near the information reading area of ​​the access control card reader, detecting electromagnetic induction data in the coil; wherein, the electromagnetic induction data includes induced voltage and / or induced current; distinguishing the object as a physical access control card or an abnormal electronic device based on the electromagnetic induction data; wherein, the abnormal electronic device is an electronic device capable of copying information in a physical access control card; the physical access control card and the abnormal electronic device have different effects on the magnetic flux passing through the coil when they are near the information reading area. The above solution can accurately distinguish between physical access cards and abnormal electronic devices without writing dynamic passwords to the physical access cards, based on the different effects of the physical access cards and the abnormal electronic devices on the magnetic flux passing through the coil when they are close to the information reading area. This avoids situations where abnormal electronic devices that have copied information from the physical access cards are verified by the access card reader, thus threatening the security of the area.

[0015] It should be understood that the description in this section is not intended to identify key or essential features of the embodiments of this application, nor is it intended to limit the scope of this application. Other features of this application will become readily apparent from the following description. Attached Figure Description

[0016] To more clearly illustrate the technical solutions in the embodiments of this application, the accompanying drawings used in the description of the embodiments will be briefly introduced below. Obviously, the accompanying drawings described below are only some embodiments of this application. For those skilled in the art, other drawings can be obtained based on these drawings without creative effort.

[0017] Figure 1 A flowchart illustrating an information identification method provided in this application embodiment;

[0018] Figure 2 This is a front view of an access control card reader provided in an embodiment of this application;

[0019] Figure 3 Top view of the access control card reader provided in the embodiments of this application;

[0020] Figure 4 This is a first schematic diagram of a magnet assembly provided in an embodiment of this application;

[0021] Figure 5 This is a second schematic diagram of the magnet assembly provided in an embodiment of this application;

[0022] Figure 6 A flowchart illustrating an information identification method provided in another embodiment of this application;

[0023] Figure 7 A schematic diagram of a detection circuit provided in another embodiment of this application;

[0024] Figure 8 This is a schematic diagram of the access control card reader structure provided in an embodiment of this application;

[0025] Figure 9 This is a schematic diagram of an electromagnetic induction data detection device provided in an embodiment of this application;

[0026] Figure 10 This is a first schematic diagram of the coil and detection circuit provided in an embodiment of this application;

[0027] Figure 11 This is a second schematic diagram of the coil and detection circuit provided in an embodiment of this application;

[0028] Figure 12 This is a second schematic diagram of the coil and detection circuit provided in an embodiment of this application;

[0029] Figure 13 This is a schematic diagram of a processing device provided in an embodiment of this application. Detailed Implementation

[0030] To enable those skilled in the art to better understand the present application, the technical solutions in the embodiments of the present application will be clearly and completely described below with reference to the accompanying drawings. Obviously, the described embodiments are only some embodiments of the present application, and not all embodiments. Based on the embodiments in the present application, all other embodiments obtained by those of ordinary skill in the art without creative effort should fall within the scope of protection of the present application.

[0031] It should be noted that the terms "first," "second," "third," "fourth," "actual," "preset," etc., used in the specification, claims, and accompanying drawings of this application are used to distinguish similar objects and are not necessarily used to describe a specific order or sequence. It should be understood that such data can be interchanged where appropriate so that the embodiments of this application described herein can be implemented in orders other than those illustrated or described herein. Furthermore, the terms "comprising" and "having," and any variations thereof, are intended to cover non-exclusive inclusion; for example, a process, method, system, product, or apparatus that comprises a series of steps or units is not necessarily limited to those steps or units explicitly listed, but may include other steps or units not explicitly listed or inherent to such processes, methods, products, or apparatus.

[0032] Figure 1 This flowchart illustrates an information identification method provided in this application embodiment. This embodiment is applicable to distinguishing items near the information reading area of ​​an access control card reader. Typically, this embodiment is applicable to distinguishing whether an item near the access control card reader is a physical access card or an abnormal electronic device. This method can be executed by an access control card reader, which can be implemented in hardware and / or software and can be configured within an electronic device. Figure 1 As shown, the method includes:

[0033] S110. When an object approaches the information reading area of ​​the access control card reader, the electromagnetic induction data in the coil is detected; wherein, the electromagnetic induction data includes induced voltage and / or induced current.

[0034] The embodiments of this application can be applied to access control card readers. The access control card reader includes a magnet and a coil. The area enclosed by the coil includes the information reading area of ​​the access control card reader. The magnetic field lines of the magnet pass through the information reading area, and the direction of the magnetic field lines passing through the information reading area is not parallel to the plane where the information reading area is located.

[0035] It should be noted that the conventional components of access control card readers are not described in detail here. In this embodiment, in addition to the conventional components of access control card readers, magnets and coils are also included, all deployed within the access control card reader to form an integrated unit. The specific shape and number of turns of the coil are not limited and are determined according to the actual situation. The area enclosed by the coil must include the information reading area of ​​the access control card reader. For example, such as... Figure 2 As shown, Figure 2 This is the side of the access control card reader facing the user. The coil is actually embedded inside the access control card reader. (For ease of explanation...) Figure 2 The information is displayed visually within the access control card reader. The information reading area is the region where the card is sensed and read when an object approaches. The area enclosed by the coil must include the information reading area. The magnet is located inside the access control card reader. Figure 2 The number of magnets mentioned is merely an example; the number of magnets is not limited, as long as the magnetic field lines generated by the magnets can pass through the information reading area in a direction that is not parallel to the plane containing the information reading area. Figure 2 In this context, the plane containing the information reading area is the side of the access control card reader facing the user. The plane containing the coil can be parallel to the plane containing the information reading area. Figure 3 This is a top view of the magnetic field lines passing through the coil. Figure 3 The magnetic field lines in the coil are straight lines perpendicular to the plane of the coil, but they can also be curves and not necessarily perpendicular, as long as they pass through the coil. Magnet combinations can be as follows: Figure 4 and Figure 5As shown, N represents the North Pole and S represents the South Pole. The relative positions of the coil and the magnet are not unique, as long as the magnetic field lines can pass through the coil.

[0036] The item can be something held by the user, such as a physical access card or a tampered electronic device. When the user brings the item near the information reading area, it triggers the identification and differentiation of the item. Generally, physical access cards and tampered electronic devices have different effects on the magnetic field generated by the magnet. One specific scenario is that tampered electronic devices have more complex circuit structures and more metal components, thus providing greater shielding against the magnetic field generated by the magnet, resulting in a larger change in the magnetic flux in the coil. In contrast, physical access cards have simpler circuit structures and fewer metal components, thus providing less shielding against the magnetic field generated by the magnet, resulting in less change in the magnetic flux in the coil. Another specific scenario is that tampered electronic devices contain permanent magnets, such as speakers, earpieces, camera voice coil motors, vibration motors, and wireless charging coils. These permanent magnets can affect the magnetic field of the magnet. Physical access cards, however, do not contain permanent magnets and therefore do not affect the magnetic field of the magnet. Based on these two scenarios, the different effects of physical access cards and tampered electronic devices on the magnetic field of the magnet, and consequently on the different magnetic flux passing through the coil, can be used to differentiate between them.

[0037] Specifically, when an object is detected approaching the information reading area, the object affects the magnetic flux passing through the coil, causing electromagnetic induction data to be generated in the coil. This electromagnetic induction data can be detected, for example, by detecting the induced voltage and / or induced current in the coil. The detection method for the electromagnetic induction data can be determined based on the actual situation; for example, an induction data detection device can be used, or other circuits that can directly reflect changes in induced voltage and / or induced current data can be used for detection.

[0038] S120. Based on the electromagnetic induction data, distinguish whether the item is a physical access card or an abnormal electronic device; wherein, the abnormal electronic device is an electronic device capable of copying information from a physical access card; the physical access card and the abnormal electronic device have different effects on the magnetic flux passing through the coil when they are close to the information reading area.

[0039] For example, because physical access cards and abnormal electronic devices have different effects on the magnetic field, and thus different effects on the change in magnetic flux in the coil, the detected electromagnetic induction data in the coil are different. Based on the influence of physical access cards and abnormal electronic devices on the magnetic field in the above embodiments, when an abnormal electronic device approaches the information reading area, the change in magnetic flux in the coil is larger, and the electromagnetic induction data generated in the coil is larger; when a physical access card approaches the information reading area, the change in magnetic flux in the coil is smaller, and the electromagnetic induction data generated in the coil is smaller. Based on these differences, items approaching the information reading area can be distinguished according to the electromagnetic induction data to determine whether the item is a physical access card or an abnormal electronic device.

[0040] In this embodiment, the above-described scheme can be triggered when an item approaches the information reading area, or the access control card reader can read the item's information when the item approaches the information reading area, compare the item's information with preset information, and then execute the above-described scheme. For example, the access control card reader identifies a card number and compares it with a preset card number. If the comparison matches, the above-described scheme is executed to distinguish whether the item is a physical access control card or an abnormal electronic device. If the item is a physical access control card, the verification is confirmed to be successful. If it is an abnormal electronic device, even if the card number comparison matches, the verification will fail, thereby preventing the situation where an abnormal electronic device copies the information of a physical access control card and impersonates a physical access control card to pass verification.

[0041] In this embodiment of the application, distinguishing the item as a physical access card or an abnormal electronic device based on the electromagnetic induction data includes:

[0042] The electromagnetic induction data is compared with preset data;

[0043] If the electromagnetic induction data is greater than the preset data, the item is determined to be an abnormal electronic device;

[0044] Otherwise, the item is determined to be a physical access card.

[0045] Exemplarily, since the change in magnetic flux in the coil caused by the abnormal electronic device is relatively large, when the abnormal electronic device is close to the information reading area, the electromagnetic induction data in the coil is relatively large. Compare the electromagnetic induction data in the coil with the preset data. If the electronic induction data is greater than the preset data, determine that the item is an abnormal electronic device; otherwise, determine that the item is a physical access card. The electromagnetic induction data is the induced voltage and / or the induced current. If the electromagnetic induction data is the induced voltage, the preset data is the preset voltage. If the electromagnetic induction data is the induced current, the preset data is the preset current. The preset data can be determined according to the data obtained through experiments under normal circumstances. For example, determine the maximum value of the electromagnetic induction data in the coil when the physical access card is close to the information reading area through experiments, and determine the minimum value of the electromagnetic induction data in the coil when the abnormal electronic device is close to the information reading area through experiments. Take the value between the maximum value of the electromagnetic induction data corresponding to the physical access card and the minimum value of the electromagnetic induction data corresponding to the abnormal electronic device as the preset data, so as to distinguish the subsequently detected electromagnetic induction data. For example, the maximum value of the electromagnetic induction data corresponding to the physical access card is a, and the minimum value of the electromagnetic induction data corresponding to the abnormal electronic device is b, a < b, and select the preset data within the interval [a, b].

[0046] The technical solution of the embodiment of the present application is applied to an access control card reader, which includes a magnet and a coil. The area surrounded by the coil contains the information reading area of the access control card reader. The magnetic induction lines of the magnet pass through the information reading area, and the direction in which the magnetic induction lines pass through the information reading area is not parallel to the plane where the information reading area is located. The method includes: when an item is close to the information reading area of the access control card reader, detect the electromagnetic induction data in the coil; where the electromagnetic induction data includes the induced voltage and / or the induced current; distinguish the item as a physical access card or an abnormal electronic device according to the electromagnetic induction data; where the abnormal electronic device is an electronic device that can copy the information in the physical access card; the physical access card and the abnormal electronic device have different effects on the magnetic flux passing through the coil when they are respectively close to the information reading area. The above solution can accurately distinguish between the physical access card and the abnormal electronic device without writing a dynamic password to the physical access card, according to the different effects of the physical access card and the abnormal electronic device on the magnetic flux passing through the coil when they are respectively close to the information reading area, and avoid the situation that an abnormal electronic device that copies the information in the physical access card is verified by the access control card reader, resulting in a threat to the regional security.

[0047] Figure 6This is a flowchart illustrating an information identification method according to another embodiment of this application. This embodiment is an optimization based on the above embodiment; solutions not described in detail in this embodiment are found in the above embodiment. Figure 6 As shown, the method in this embodiment of the application specifically includes the following steps:

[0048] S210. When an object approaches the information reading area of ​​the access control card reader, electromagnetic induction data in the coil is detected; wherein, the electromagnetic induction data includes induced voltage and / or induced current. This application embodiment applies to an access control card reader, which includes a magnet and a coil. The area enclosed by the coil includes the information reading area of ​​the access control card reader. The magnetic field lines of the magnet pass through the information reading area, and the direction in which the magnetic field lines pass through the information reading area is not parallel to the plane where the information reading area is located.

[0049] S220. If a high level is received at the processor input terminal of the access control card reader, the item is determined to be an abnormal electronic device.

[0050] In this embodiment, the two terminals of the coil are connected to the base and emitter of the transistor, respectively, and the collector of the transistor is connected to the processor input terminal of the access control card reader.

[0051] For example, such as Figure 7 As shown, the two terminals of the coil are connected to the base and emitter of the transistor, respectively. The collector of the transistor is connected to the processor input terminal of the access control card reader, and the emitter is connected to the processor ground terminal of the access control card reader. In this case, if the base current of the transistor is greater than or equal to the transistor's on-state current, the transistor conducts, and the processor input terminal is at a high level. If the base current of the transistor is less than the transistor's on-state current, the transistor is off, and the processor input terminal is at a low level.

[0052] When an item approaches the information reading area, the changes in magnetic flux in the coil differ between a physical access card and an abnormal electronic device, resulting in different induced currents. When an abnormal electronic device approaches the information reading area, the change in magnetic flux in the coil is larger, generating a larger induced current. Therefore, the transistor conducts, and the processor input is at a high level. If a high level is detected at the processor input, the item approaching the information reading area can be identified as an abnormal electronic device.

[0053] S230. If a low level is received at the processor input terminal of the access control card reader, the item is determined to be a physical access control card.

[0054] Similarly, if a physical access card is near the information reading area, the change in magnetic flux in the coil is small, resulting in a small induced current. Therefore, the transistor is turned off, and the processor input is at a low level. If a low level is detected at the processor input, it can be determined that the item near the information reading area is a physical access card.

[0055] The advantage of the above solution is that it can directly reflect the change in magnetic flux passing through the coil by turning the transistor on and off, accurately distinguishing between physical access cards and abnormal electronic devices. Transistors are small in size, can be integrated into access control card readers, and are low in cost.

[0056] In this embodiment of the application, the method further includes:

[0057] If the item is determined to be a physical access card, the target information is obtained by reading the information from the physical access card.

[0058] If the target information matches the preset target information, then the user holding the item is deemed to have passed verification.

[0059] If the item is determined to be an abnormal electronic device, then the user holding the item will fail authentication.

[0060] For example, after distinguishing whether the item is a physical access card or an abnormal electronic device, if the item is a physical access card, the target information obtained by reading the physical access card can be compared with preset target information. If the comparison matches, it means that the user holding the item has been verified. The target information can be card number, password, biometric data, etc. If the item is determined to be an abnormal electronic device, regardless of whether the target information matches the preset target information, it is determined that the user holding the item has failed verification.

[0061] This application provides an information identification method. When an object approaches the information reading area of ​​an access control card reader, electromagnetic induction data in the coil is detected. If a high-level signal is received at the processor input terminal of the access control card reader, the object is determined to be an abnormal electronic device; if a low-level signal is received at the processor input terminal, the object is determined to be a physical access card. This solution incorporates a transistor detection circuit, accurately distinguishing objects by the conduction and cutoff of the transistor. No other detection devices are needed; the judgment can be made directly based on the signal at the processor input terminal, making it more intuitive and efficient. Furthermore, the transistor is small in size, and the detection circuit can be fully integrated into the access control card reader, making it simpler, more convenient, and cost-effective.

[0062] Figure 8This is a structural diagram of an access control card reader provided in an embodiment of this application. The technical solution of this application embodiment can be applied to situations where items near the information reading area of ​​the access control card reader need to be distinguished. Typically, this application embodiment can be applied to situations where the item near the access control card reader is a physical access control card or an abnormal electronic device. Figure 8 As shown, the access control card reader provided in this embodiment includes:

[0063] Magnet 310 is disposed inside the access control card reader, and the magnetic field lines of the magnet pass through the information reading area of ​​the access control card reader; the direction in which the magnetic field lines pass through the information reading area is not parallel to the plane in which the information reading area is located.

[0064] A coil 320 is disposed inside the access control card reader, and the area enclosed by the coil includes the information reading area;

[0065] Processing device 10, including at least one processor; and,

[0066] The memory is connected to the at least one processor for data processing; wherein,

[0067] The memory stores a computer program that can be executed by the at least one processor, which enables the at least one processor to perform the information recognition method described in any of the above embodiments.

[0068] The conventional components of an access control card reader will not be described in detail here. In this embodiment, in addition to the conventional components of an access control card reader, a magnet 310 and a coil 320 are also included, both deployed within the access control card reader to form an integrated unit. The specific shape and number of turns of the coil 320 are not limited and are determined according to the actual situation. The area enclosed by the coil 320 must include the information reading area of ​​the access control card reader. For example, such as... Figure 8 As shown, Figure 8 The side of the access control card reader facing the user; coil 320 is actually embedded inside the access control card reader. (For ease of explanation...) Figure 8 The information is displayed visually. The information reading area is the area that can be sensed and read when an object approaches. The area enclosed by coil 320 needs to include the information reading area. Magnet 310 is installed inside the access control card reader. Figure 8 The number of magnets 310 is merely an example; the number of magnets 310 is not limited, as long as the magnetic field lines generated by the magnets 310 can pass through the information reading area in a direction that is not parallel to the plane containing the information reading area. Figure 8 In this context, the plane containing the information reading area is the side of the access control card reader facing the user. The plane containing coil 320 can be parallel to the plane containing the information reading area. Figure 3This is a top view of the magnetic field lines passing through the coil. Figure 3 The magnetic field lines in the coil can be straight lines perpendicular to the plane of the coil, or they can be curves and not perpendicular, as long as they pass through the coil.

[0069] The solution in this application embodiment does not require repeatedly writing dynamic passwords to physical access cards. By configuring coils and magnets in the access control card reader, it can accurately distinguish between physical access cards and abnormal electronic devices, thus solving the problem that abnormal electronic devices can copy the information of physical access cards and be read and verified successfully by the access control card reader.

[0070] In one possible implementation of this application, the solution of this application can be combined with various optional solutions in one or more of the above embodiments. Figure 9 This is a structural diagram of an access control card reader provided for another embodiment of this application. (Reference) Figure 9 The access control card reader provided in this embodiment also includes:

[0071] An electromagnetic induction data detection device 330 is connected to two terminals of the coil 320 and is used to detect electromagnetic induction data in the coil 320; wherein, if the electromagnetic induction data is induced current, the electromagnetic induction data detection device 330 is an induced current detection device; if the electromagnetic induction data is induced voltage, the electromagnetic induction data detection device 330 is an induced voltage detection device.

[0072] For example, an electromagnetic induction data detection device can be set up to detect the electromagnetic induction data in the coil, and to distinguish whether the item is a physical access card or an abnormal electronic device based on the detected electromagnetic induction data.

[0073] In one possible implementation of this application, the solution of this application can be combined with various optional solutions in one or more of the above embodiments.

[0074] The access control card reader also includes:

[0075] The transistor has its base and emitter connected to the two terminals of the coil, its collector connected to the processor input terminal of the access control card reader, and its emitter connected to the processor ground terminal of the access control card reader.

[0076] For example, such as Figure 7As shown, the two terminals of the coil are connected to the base and emitter of the transistor, respectively. The collector of the transistor is connected to the processor input terminal of the access control card reader, and the emitter is connected to the processor ground terminal of the access control card reader. In this case, if the base current of the transistor is greater than or equal to the transistor's on-state current, the transistor conducts, and the processor input terminal is at a high level. If the base current of the transistor is less than the transistor's on-state current, the transistor is off, and the processor input terminal is at a low level.

[0077] When an item approaches the information reading area, the changes in magnetic flux in the coil differ due to the different effects of a physical access card and an abnormal electronic device on the magnetic field of the magnet, resulting in different induced currents in the coil. When an abnormal electronic device approaches the information reading area, the change in magnetic flux in the coil is larger, generating a larger induced current. Therefore, the transistor conducts, and the processor input is at a high level. If a high level is detected at the processor input, the item approaching the information reading area can be identified as an abnormal electronic device. Similarly, if a physical access card approaches the information reading area, the change in magnetic flux in the coil is smaller, generating a smaller induced current. Therefore, the transistor is turned off, and the processor input is at a low level. If a low level is detected at the processor input, the item approaching the information reading area can be identified as a physical access card.

[0078] The access control card reader also includes:

[0079] The system includes at least two transistors and corresponding coils for each transistor. The connection between the transistors and their corresponding coils can be configured in two ways: at least one first transistor, whose base is connected to the first terminal of the first coil and whose emitter is connected to the second terminal of the first coil; and at least one second transistor, whose emitter is connected to the first terminal of the second coil and whose base is connected to the second terminal of the second coil. The relative positions of the first and second terminals of the first and second coils are the same, and the area enclosed by the first and second coils both include the information reading area.

[0080] In one possible implementation of this application embodiment, the solution of this application embodiment can be combined with various optional solutions in one or more of the above embodiments. In the access control card reader provided in this embodiment, the coils are at least two; as... Figure 10 As shown, at least one coil 3201 has its first terminal 1 connected to the base of the first transistor A, and its second terminal 2 connected to the emitter of the first transistor A, as follows. Figure 11As shown, at least one coil 3202 has its first terminal 1 connected to the emitter of the second transistor B, and its second terminal 2 connected to the base of the second transistor B. The area enclosed by at least two coils contains an information reading area, and these coils can be concentric.

[0081] In one possible implementation of this application, the solution of this application can be combined with various optional solutions in one or more of the above embodiments. Figure 12 This is a structural diagram of an access control card reader provided for another embodiment of this application. (Reference) Figure 12 The access control card reader provided in this embodiment also includes:

[0082] There are at least two transistors, including at least one first transistor A, whose base is connected to the first terminal 1 of the coil and whose emitter is connected to the second terminal 2 of the coil, and at least one second transistor B, whose emitter is connected to the first terminal 1 of the coil and whose base is connected to the second terminal 2 of the coil.

[0083] For example, such as Figure 12 As shown, Figure 12 Two detection circuits are connected in parallel to the coil, with opposite connection directions. Specifically, the base of the first transistor A is connected to terminal 1 of the coil, and its emitter is connected to terminal 2 of the coil. Conversely, the base of the second transistor B is connected to terminal 2 of the coil, and its emitter is connected to terminal 1 of the coil. This design ensures that either the first or second transistor will conduct regardless of the direction of the induced current in the coil when an abnormal electronic device approaches the information reading area, thus preventing missed detections.

[0084] In this embodiment, the conduction current of the transistor is less than or equal to the minimum induced current generated in the coil when an abnormal electronic device approaches the information reading area, and greater than the maximum induced current generated in the coil when a physical access card approaches the information reading area.

[0085] For example, when selecting a transistor, it is necessary to ensure that the transistor conducts when an abnormal electronic device approaches the information reading area, but does not conduct when a physical access card approaches the information reading area. Therefore, the conduction current of the transistor needs to be less than or equal to the minimum induced current generated in the coil when the abnormal electronic device approaches the information reading area, and greater than the maximum induced current generated in the coil when the physical access card approaches the information reading area.

[0086] Figure 13A schematic diagram of a processing apparatus 10 that can be used to implement embodiments of this application is shown. Electronic devices are intended to represent various forms of digital computers, such as laptop computers, desktop computers, workstations, personal digital assistants, servers, blade servers, mainframe computers, and other suitable computers. Electronic devices can also represent various forms of mobile devices, such as personal digital processors, cellular phones, smartphones, wearable devices (such as helmets, glasses, watches, etc.), and other similar computing devices. The components shown herein, their connections and relationships, and their functions are merely illustrative and are not intended to limit the implementation of the application described and / or claimed herein.

[0087] like Figure 13 As shown, the processing device 10 includes at least one processor 11 and a memory, such as a read-only memory (ROM) 12 or a random access memory (RAM) 13, connected to the at least one processor 11 for data processing. The memory stores computer programs executable by the at least one processor. The processor 11 can perform various appropriate actions and processes based on the computer program stored in the ROM 12 or loaded from storage unit 18 into the RAM 13. The RAM 13 may also store various programs and data required for the operation of the processing device 10. The processor 11, ROM 12, and RAM 13 are interconnected via a bus 14. An input / output (I / O) interface 15 is also connected to the bus 14.

[0088] Multiple components in the processing device 10 are connected to the I / O interface 15, including: an input unit 16, such as a keyboard, mouse, etc.; an output unit 17, such as various types of displays, speakers, etc.; a storage unit 18, such as a disk, optical disk, etc.; and a communication unit 19, such as a network card, modem, wireless data processing transceiver, etc. The communication unit 19 allows the processing device 10 to exchange information / data with other devices through computer networks such as the Internet and / or various telecommunications networks.

[0089] Processor 11 can be a variety of general-purpose and / or special-purpose processing components with processing and computing capabilities. Some examples of processor 11 include, but are not limited to, a central processing unit (CPU), a graphics processing unit (GPU), various special-purpose artificial intelligence (AI) computing chips, various processors running machine learning model algorithms, a digital signal processor (DSP), and any suitable processor, controller, microcontroller, etc. Processor 11 performs the various methods and processes described above, such as information recognition methods.

[0090] In some embodiments, the information identification method may be implemented as a computer program tangibly contained in a computer-readable storage medium, such as storage unit 18. In some embodiments, part or all of the computer program may be loaded and / or installed on the processing device 10 via ROM 12 and / or communication unit 19. When the computer program is loaded into RAM 13 and executed by processor 11, one or more steps of the information identification method described above may be performed. Alternatively, in other embodiments, processor 11 may be configured to perform the information identification method by any other suitable means (e.g., by means of firmware).

[0091] Various embodiments of the systems and techniques described above herein can be implemented in digital electronic circuit systems, integrated circuit systems, field-programmable gate arrays (FPGAs), application-specific integrated circuits (ASICs), application-specific standard products (ASSPs), systems-on-a-chip (SoCs), payload-programmable logic devices (CPLDs), computer hardware, firmware, software, and / or combinations thereof. These various embodiments may include implementations in one or more computer programs that can be executed and / or interpreted on a programmable system including at least one programmable processor, which may be a dedicated or general-purpose programmable processor, capable of receiving data and instructions from a storage system, at least one input device, and at least one output device, and transmitting data and instructions to the storage system, the at least one input device, and the at least one output device.

[0092] Computer programs used to implement the methods of this application may be written in any combination of one or more programming languages. These computer programs may be provided to the processor of a general-purpose computer, a special-purpose computer, or another programmable access control card reader, such that when executed by the processor, the computer programs cause the functions / operations specified in the flowcharts and / or block diagrams to be implemented. The computer programs may be executed entirely on a machine, partially on a machine, or as a standalone software package, partially on a machine and partially on a remote machine, or entirely on a remote machine or server.

[0093] In the context of this application, a computer-readable storage medium can be a tangible medium that may contain or store a computer program for use by or in conjunction with an instruction execution system, apparatus, or device. A computer-readable storage medium can be, but is not limited to, electronic, magnetic, optical, electromagnetic, infrared, or semiconductor systems, apparatus, or devices, or any suitable combination of the foregoing. Alternatively, a computer-readable storage medium can be a machine-readable signal medium. More specific examples of machine-readable storage media include electrical connections based on one or more wires, portable computer disks, hard disks, random access memory (RAM), read-only memory (ROM), erasable programmable read-only memory (EPROM or flash memory), optical fiber, portable compact disk read-only memory (CD-ROM), optical storage devices, magnetic storage devices, or any suitable combination of the foregoing.

[0094] To provide interaction with a user, the systems and techniques described herein can be implemented on an electronic device having: a display device (e.g., a CRT (cathode ray tube) or LCD (liquid crystal display) monitor) for displaying information to the user; and a keyboard and pointing device (e.g., a mouse or trackball) through which the user provides input to the electronic device. Other types of devices can also be used to provide interaction with the user; for example, feedback provided to the user can be any form of sensory feedback (e.g., visual feedback, auditory feedback, or tactile feedback); and input from the user can be received in any form (including sound input, voice input, or tactile input).

[0095] The systems and technologies described herein can be implemented in computing systems that include backend components (e.g., as data servers), or computing systems that include middleware components (e.g., application servers), or computing systems that include frontend components (e.g., user computers with graphical user interfaces or web browsers through which users can interact with implementations of the systems and technologies described herein), or any combination of such backend, middleware, or frontend components. The components of the system can be interconnected through digital data processing (e.g., data processing networks) of any form or medium. Examples of data processing networks include local area networks (LANs), wide area networks (WANs), blockchain networks, and the Internet.

[0096] A computing system can include clients and servers. Clients and servers are generally geographically separated and typically interact via data processing networks. The client-server relationship is created by computer programs running on the respective computers and having a client-server relationship with each other. The server can be a cloud server, also known as a cloud computing server or cloud host, which is a hosting product within the cloud computing service system to address the shortcomings of traditional physical hosts and VPS services, such as high management difficulty and weak business scalability.

[0097] It should be understood that the various forms of processes shown above can be used to rearrange, add, or delete steps. For example, the steps described in this application can be executed in parallel, sequentially, or in different orders, as long as the desired information of the technical solution of this application can be achieved, and this is not limited herein.

[0098] The specific embodiments described above do not constitute a limitation on the scope of protection of this application. Those skilled in the art should understand that various modifications, combinations, sub-combinations, and substitutions can be made according to design requirements and other factors. Any modifications, equivalent substitutions, and improvements made within the spirit and principles of this application should be included within the scope of protection of this application.

Claims

1. An information identification method, characterized in that, An access control card reader is used, comprising a magnet and a coil, wherein the area enclosed by the coil includes the information reading area of ​​the access control card reader, and the magnetic field lines of the magnet pass through the information reading area, wherein the direction in which the magnetic field lines pass through the information reading area is not parallel to the plane in which the information reading area is located; the method includes: When an object approaches the information reading area of ​​the access control card reader, electromagnetic induction data in the coil is detected; wherein, the electromagnetic induction data includes induced voltage and / or induced current; The electromagnetic induction data distinguishes whether the item is a physical access card or an abnormal electronic device; wherein, the abnormal electronic device is an electronic device capable of copying information from a physical access card; the physical access card and the abnormal electronic device have different effects on the magnetic flux passing through the coil when they are brought close to the information reading area.

2. The method according to claim 1, characterized in that, The electromagnetic induction data is used to distinguish whether the item is a physical access card or an abnormal electronic device, including: The electromagnetic induction data is compared with preset data; If the electromagnetic induction data is greater than the preset data, the item is determined to be an abnormal electronic device; Otherwise, the item is determined to be a physical access card.

3. The method according to claim 1, characterized in that, The two terminals of the coil are connected to the base and emitter of the transistor, respectively, and the collector of the transistor is connected to the processor input terminal of the access control card reader. Accordingly, based on the electromagnetic induction data, the item can be distinguished as a physical access card or an abnormal electronic device, including: If a high level is received at the processor input terminal of the access control card reader, the item is determined to be an abnormal electronic device; If a low level is received at the processor input terminal of the access control card reader, the item is determined to be a physical access control card.

4. The method according to any one of claims 1-3, characterized in that, The method further includes: If the item is determined to be a physical access card, the target information is obtained by reading the information from the physical access card. If the target information matches the preset target information, then the user holding the item is deemed to have passed verification. If the item is determined to be an abnormal electronic device, then the user holding the item will fail authentication.

5. An access control card reader, characterized in that, The access control card reader includes: A magnet is disposed inside the access control card reader, and the magnetic field lines of the magnet pass through the information reading area of ​​the access control card reader; the direction in which the magnetic field lines pass through the information reading area is not parallel to the plane in which the information reading area is located. A coil is installed inside the access control card reader, and the area enclosed by the coil includes the information reading area. At least one processor; and, The memory is connected to the at least one processor for data processing; wherein, The memory stores a computer program that can be executed by the at least one processor, the computer program being executed by the at least one processor to enable the at least one processor to perform the information identification method according to any one of claims 1-4.

6. The access control card reader according to claim 5, characterized in that, The access control card reader also includes: An electromagnetic induction data detection device is connected to two terminals of the coil and is used to detect electromagnetic induction data in the coil; wherein, if the electromagnetic induction data is induced current, the electromagnetic induction data detection device is an induced current detection device; if the electromagnetic induction data is induced voltage, the electromagnetic induction data detection device is an induced voltage detection device.

7. The access control card reader according to claim 5, characterized in that, The access control card reader also includes: The transistor has its base and emitter connected to the two terminals of the coil, its collector connected to the processor input terminal of the access control card reader, and its emitter connected to the processor ground terminal of the access control card reader.

8. The access control card reader according to claim 5, characterized in that, The access control card reader also includes: There are at least two transistors, including at least one first transistor whose base is connected to the first terminal of the coil and whose emitter is connected to the second terminal of the coil, and at least one second transistor whose emitter is connected to the first terminal of the coil and whose base is connected to the second terminal of the coil.

9. The access control card reader according to claim 5, characterized in that, The access control card reader also includes: The system includes at least two transistors and corresponding coils for each transistor. The connection between the transistors and their corresponding coils can be configured in two ways: at least one first transistor, whose base is connected to the first terminal of the first coil and whose emitter is connected to the second terminal of the first coil; and at least one second transistor, whose emitter is connected to the first terminal of the second coil and whose base is connected to the second terminal of the second coil. The relative positions of the first and second terminals of the first and second coils are the same, and the area enclosed by the first and second coils both include the information reading area.

10. The access control card reader according to any one of claims 7-9, characterized in that, The conduction current of the transistor is less than or equal to the minimum induced current generated in the coil when an abnormal electronic device approaches the information reading area, and greater than the maximum induced current generated in the coil when a physical access card approaches the information reading area.

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