DUAL-SLOT SMART CARD READER WITH MECHANICAL SENSING CLAWS, MAGNETIC-ELECTRICAL ISOLATION BARRIER, AND INTERFERENCE-RESISTANT LAYOUT ARCHITECTURE.

Abstract

The invention relates to a dual-slot smart card reader device (1) capable of performing multi-party authentication, particularly in field operations. The device (1) comprises a primary slot (3) and a secondary slot (4) each containing a chip connector (8), located on the main PCB (5). To minimize electromagnetic interference (crosstalk) caused by capacitive and inductive coupling between the signal lines of the connectors (8) during data transmission, these chip connectors (8) are positioned at asymmetrical distances on the main PCB (5). The device (1) is equipped with a copper shield (9) connected to the ground line of the main PCB (5) that discharges electromagnetic noise between the connectors (8) to ground; the same copper shield (9) is also placed between the NFC antenna module (6) and the chip connectors (8) to suppress NFC-related RF interference.The mechanical sensing tabs (7) located at the entry of slots (3, 4) convert the physical insertion movement of the card (2) into a momentary hardware interrupt alert. Following this alert, contact reading via the chip connector (8) and contactless reading via the NFC antenna module (6) are initiated simultaneously, and the obtained data are cross-compared by the microcontroller to complete the dual-layer hybrid authentication. In addition, the placement angle of the slots (3, 4) allows for uninterrupted visual monitoring of the identity information on the card (2) from the user's direct line of sight.

Description

1 TARIFF MECHANICAL SENSING TIPS, MAGNETIC-ELECTRICAL ISOLATION BARRIER AND PARASITE PREVENTION INSTALLATION DUAL-SLOT SMART CARD READER WITH A DESIGNED ARCHITECTURE 5 Technical Area This invention is particularly useful in field operations and mobile applications. Multi-party and secure authentication in environments 10 capable of doing this, thanks to its two different card slots. between the signal lines of the MUP connectors belonging to the sockets electromagnetic interference (crosstalk) both geometrically and with layered shielding technologies to a minimum downloaded, radio frequency (RF) 15 emitted by the NFC antenna module absorbing the attempt, instantaneous card entry transaction mechanical sensing that converts into a hardware interrupt signal having a mechanism and the identity on the cards information from the user's direct line of sight facilitating uninterrupted visual tracking; thus, contactless 20 and contactless reading channels simultaneously and cross-sectionally double-layered hybrid operated in a comparative manner mechanical and performs the authentication function. It relates to the architecture of an electronic card reader device. State of the Art In the current state of the art, multiple devices can be integrated within the same unit. reading too many smart cards or hybrid (contact + various cards that allow contactless verification 30 There are reader architectures. 2 Accordingly, in patent application number GB2523102A, two using the same device with payment cards belonging to different account holders via two separate slots (102a, 102b) a device that allows reading in real time It is explained in the document that the two cards are "simultaneously 5 "Readability" is described at a functional level; however, these two socket connectors printed circuit board (PCB) its geometric positioning on it, between the slots possible electromagnetic interference (crosstalk) how to press or insert the card into the slot 10 any information on how it will be perceived in terms of hardware No technical solution is offered. Similarly, in patent application number WO1997046964A1, Both contact and contactless (proximity) readings in the same reservoir 15 a dual-mode smart card reader capable of It is explained in the document in question, regarding contact and contactless. Combining reading modes in a single device is being taught, but these two reading channels (contact (connector and contactless antenna) 20 close together RF interference (EMI) resulting from its positioning how to prevent the problem or obtain results from these two channels The data obtained is synchronized with a hardware trigger and how to verify it using cross-comparison There is no teaching whatsoever. 25 Furthermore, as can be seen in document number EP0817109A3 (Figure 2), smart dual card reader devices The cards pass through external slots to the main electronic board. 30 in the plane parallel to the sensors located above and below. It is located there. In light of the three documents mentioned... When evaluated, these traditional architectures are particularly the mobile and industrial uses it brings with it 3 Technical chronic problems are detailed below. It is being discussed: a) Electrical Interference (Crosstalk) and Signal Distortion The dual-slot configuration described in GB2523102A allows for two cards. while enabling readability, the PCB features two separate sets of connectors. when their positions on it are kept symmetrical and close together, between high-frequency clock (CLK) and data (I / O) lines capacitive coupling caused by electric field and magnetic field 10 Inductive coupling inevitably occurs as a result. Cards and MUP connectors as in EP0817109A3 In the vertical plane, completely one-on-one, symmetrical and parallel. positioning it as such further strengthens this alliance. It intensifies because parallel and symmetrical lines 15 As the distance between them decreases, mutual inductance and Capacitance values ​​are increasing, which affects the signal lines. crosstalk, data between lines leakage and especially synchronization in the ISO 7816 protocol This leads to critical data losses during data transmission. What 20 Neither GB2523102A nor EP 0 817 109 A3 will reduce this coupling. asymmetrical layout, distance optimization, or It does not recommend a grounded insulation barrier; the problem is... only through the device's "ability to read two cards" function The issue has been addressed, but the signal integrity problem remains unresolved. 25 b) RF Interference (Electromagnetic Interference - EMI) The dual-mode architecture described in WO1997046964A1 is contact-based and By combining contactless reading in the same housing, 30 high frequency produced by the contactless NFC antenna (13.56 MHz) RF waves are transmitted to the contact MUP within the device. interference caused by proximity to connectors 4 This initiative does not address the problem of connector pins. inducing parasitic noise and therefore contact bit errors or reading failures during reading This can be the reason. This problem, especially when two different readings are involved, the same 5 technology (contact ISO 7816 and non-contact ISO 14443) more in scenarios where it is active in physical volume and time This is also becoming apparent; however, WO1997046964A1 these two physical aspects of how technologies will not affect each other It does not teach an insulation or absorption mechanism. c) Impossibility of Visual Tracking The stacked (vertical) card layout architecture in EP0817109A3, Unlike the side-by-side arrangement in GB2523102A, the cards This causes them to physically close each other. 15 When the cards are stacked vertically, the device normally From the point of view of usage and perspective, the one that is underneath or the identification information on the cards in the back, The photos and security elements are clearly visible. It is not visible. GB2523102A Thanks to the side-by-side arrangement, these 20 Although it appears to partially solve the problem, the document suggests that this layout... a specific one optimized from the user's point of view technically describe whether it involves an angle or posture requirement It does not; therefore, visual tracking is merely a coincidence. It appears as a side effect, a systematic design 25 It is not considered as a target. d) Detection Latencies and Processor Load Neither GB2523102A nor WO1997046964A1 ensures the card fits perfectly into the slot (30 inches). how the hardware will detect whether it is fitting or not It offers a mechanism for this. In known techniques, this detection, usually software / electronic polling by this method, that is, at specific intervals This is done by continuously checking the connector lines. This approach creates a constant processor load on the system. and the moment the card is physically inserted and this situation There is an inevitable 5-minute gap between the moment it is detected by software. It leads to a delay in perception. Especially In the hybrid validation scenario described in WO1997046964A1, Simultaneous initiation of contact and contactless readings Given the necessity, this polling-based delay, two timing inconsistencies between channels and therefore 10 This leads to a decrease in the reliability of cross-validation. It is possible. In conclusion, documents GB2523102A and WO1997046964A1 Both of them functionally utilize the multi-card or hybrid reading concept. 15 teaching at the level, but in paragraphs (a)-(d) above four fundamental technical problems detailed Crosstalk / signal distortion, RF interference, visual tracking. impossibility and hardware detection delay - together and Any doctrine that addresses this with an integrated solution 20 It does not offer. This situation is in line with the known state of the art. unresolved, important and technically related It forms a problem group. Problems that the invention aims to solve 25 As detailed above in the known state of the art. (a) connectors and signal lines discussed capacitive due to symmetrical / parallel placement inductively coupled crosstalk problem, (b) 30 with NFC antenna RF resulting from the proximity of contact connectors interference (EMI) problem, (c) cards stacked on top of each other or visual resulting from placement at unoptimized angles 6 impossibility of tracking and (d) based on software polling Processor load and latency problems caused by perception; each one of the known pairs is GB2523102A and WO1997046964A1. Unresolved or partially resolved in card / hybrid reader architectures a 5 that remains unsolved and is technically interconnected It constitutes a problem group. The present invention addresses this problem. the group within a single integrated architecture, both geometrically and It aims to solve the problem at both the layered and hardware levels. Accordingly, the purpose of the invention is outlined in the following 10 points: a dual-slot smart system aimed at the stated technical targets To provide a card reader device: a) Multilayered Interference Management (Anti-Crosstalk Shielding) The primary purpose of the invention is to have only "two" as in GB2523102A. not limited to providing the "card readability" function, This function is performed while preserving signal integrity. For this purpose, the first card slot (1202-200) and the second card 6-pin MUP chip connectors in socket (1202-300) 20 (1202-500) are positioned next to each other on the main PCB (1202-700). in a way that will minimally affect its magnetic field with asymmetric distances and geometric angles It is positioned between the two connectors. A protector 25 is directly connected to the ground (GND) line of the main PCB. Insulation Barrier (1202-800) integrated, EP 0 817 109 The symmetrical / parallel layout in A3 is inevitable. noise from capacitive and inductive coupling to ground removing it and thus eliminating the root cause of crosstalk It was intended to be suppressed from then on. 30 7 b) Prevention of RF Interference (EMI) In WO1997046964A1, contact and non-contact readings are on the same housing. RF initiative left unresolved despite being unified In order to eliminate this problem, the device in question has 5 NFC Antenna Module (1202-600) and MUP chip connectors (1202-500) an Absorber Plate in the regions it approaches It has been positioned in such a way that the NFC antenna operates at 13.56 MHz. RF interference originating from broadcasts on that frequency damping and electromagnetic 10 in connector pins minimizing the generation of induction noise is the goal. c) Ensuring Visual Tracking Through Field of View Alignment Unlike the overlapping arrangement in EP0817109A3 and Going beyond the side-by-side placement in GB2523102A, The invention refers to the position of the card slots when cards are inserted into the device. their identification information, photos and security 20 elements from the user's direct line of sight systematic that will ensure uninterrupted and clear reading It is designed with a viewing angle. Thus, visual tracking, By moving away from viewing it as a random side effect, the invention becomes a conscious decision. It has been made a design goal. d) Mechanically Triggered Real-Time Detection Switch) The software polling approach in known techniques eliminating the processor load and detection latency it brings 30 For this purpose, the device that is the subject of the invention is connected to the card slots. with installed Mechanical Detection Claws (1202-400) It is equipped with these tabs the moment the card is inserted into the slot. 8 by physically displacing itself on the main PCB a momentary hardware interrupt to the microcontroller (interrupt) alert is sent, thus indicating the presence of the card. in real time without the need for software queries It is being detected. 5 e) Temporal Consistency of Dual-Layer Hybrid Verification Implementation Finally, the contact / non-contact 10 taught in WO1997046964A1. The concept of hybrid reading is taken a step further in the invention, Hardware from mechanical sensing claws (1202-400) a pair that is directly triggered by the interrupt warning It has been transformed into a layered hybrid validation architecture. This thanks to the 15 made via the MUP chip connector (1202-500) via contact reading through NFC Antenna Module (1202-600) The contactless reading performed coincides with the same hardware trigger moment. depending on the situation, it is initiated simultaneously and the data obtained cross-comparison by microcontroller A reliable verification result with high temporal consistency 20 It is produced. Consequently, the invention solves the problem left unresolved by GB2523102A. geometric / electromagnetic isolation problems RF interference left unresolved by WO1997046964A1 and 25 hardware synchronization issues, a single integrated system It aims to address these issues together within the architecture. Explaining the Figures Figure 1. Perspective of the card reader with cards attached. appearance, 9 Figure 2. Card reader viewed from the back with cards inserted. appearance, Figure 3. Cross-section of the card reader with cards attached. appearance, Figure 4. Card reader viewed from the back with cards attached. 5 schematic view, Explanation of References in Figures 1. Card reader 2. Card 10 3. Primary slot 4. Secondary slot 5. Main PCB 6. NFC antenna module 7. Mechanical sensing claws 15 8. Chip connector 9. Copper armor Disclosure of the Invention The invention card reader device (1) is basically a housing primary slot (3) and secondary slot located within it It consists of two separate card slots, slot (4). The first card (2) and the second card (2) are placed in these slots respectively. can be placed and both slots (3, 4) have a common 25 It is carried on the main PCB (5). Asymmetrical Placement of Connectors In traditional techniques, the known bottom-bottom / top-top and exactly 30 Unlike parallel layout models, the device in question Chip in primary slot (3) and secondary slot (4) connectors (8) on the main PCB (5) in a way that will minimally affect its magnetic field with asymmetrical distances and specific geometric angles It is positioned. In a preferred application, the primary slot (3) and secondary slot (4) chip connectors (8), main PCB (5) 1.65 mm apart from each other along the Y-axis It is positioned with a shifted position. This is asymmetrical. and shifted geometry, two during data transmission signal lines belonging to the connector (8) may occur Capacitive and inductive coupling, the relationship between lines by reducing its effective proximity to the source by at least 10 It downloads. The angle and distance of placement in question determine the chip. contact data connectors (8) in accordance with ISO 7816 standard high voltage generated during transmission (clock and I / O lines) mutual inductance and capacitance of frequency signals 15 that will reduce its impact to a practically negligible level It has been optimized in this way. Electromagnetic Isolation with Copper Armor Maximizing physical and electronic isolation 20 for the purpose of between the primary slot (3) and the secondary slot (4) between the chip connectors (8) and the ground on the main PCB (5) a directly soldered or contacted to the (GND) line Copper armor (9) is integrated. The copper armor (9) preferably in the form of one of the following alternative structures 25 realizable: A Mu-Metal plate with high magnetic permeability; A copper conductor covered with Kapton insulation film 30 band; or 11 Vertical via arrangements within the main PCB (5) (via stitching) supported, grounded on the main PCB (5) an SMT metal armor wall (shielding can). Copper armor (9), a chip 5 during high-speed data transfer. capacitive and which can pass from one connector (8) to another by absorbing inductive noise emission (crosstalk), discharge the noise directly to the ground line of the main PCB (5) It is doing. In the application supported by Via stitching, the main Between the ground plane on the PCB (5) and the armor wall 10 creating multiple low-impedance ports thanks to the transfer of high-frequency components to the ground. It is being made even more effective. RF Absorption Between NFC Antenna and Connectors 15 Another important aspect of the invention is that the device (1) contains NFC antenna module (6) and chip connectors (8) Copper armor (9) in the areas where it approaches or overlaps It is located. The copper shield (9) in this location contains the NFC antenna 20 module (6) 13.56 MHz in accordance with ISO 14443 standard RF waves originating from the transmission at that frequency to the chip parasitic electromagnetic on connector (8) pins by damping the generation of induction noise This reduces the risk of contactless reading during NFC 25. High frequency energy emitted by the antenna module (6) is contact It does not disrupt the signal integrity of the reading channel. Viewpoint Alignment The primary slot (3) and secondary slot (4) slots of the device (1) Thanks to its special positional arrangement on its body, the card (2) when attached, during normal use of the user 12 from the direct line of sight, all on the card (2) Identity information, logos and photos clearly It remains visible. This angle of view allows the cards (2) will not cover each other or the device (1) body, every 5 without the user having to make any extra move so that both cards (2) can be visually followed It is designed in this way, especially for field operations. The user performing the identity check, without letting go of the device. or direct visual verification without removing the cards. is able to. 10 Real-time triggering with mechanical sensing claws. When a card (2) is inserted into the primary slot (3), the front of the card (2) the tip, mechanical sensing located at the entrance of this slot 15 by physically hitting their nails (7) and the place of these nails This causes it to change. Mechanical perception This sudden change in position of the nails (7) the main PCB (5) a momentary hardware interrupt to the microcontroller on it It sends a (hardware interrupt) warning. The same mechanism applies to 20 Mechanical sensing located at the entrance of the secondary slot (4) independent for the second card (2) through its nails (7) and is operated in an equivalent manner. This hardware triggering the method, software querying used in known techniques Unlike the (polling) approach, the microcontroller continuously 25 there is no need to check the connector lines. This reduces the processor load and allows the card to function properly. (2) the moment it is physically located and this situation electronically The delay between the moment it is perceived and the present is negligible. is being reduced to level 30. 13 Dual-Layer Hybrid Verification Process Hardware cutting from mechanical sensing claws (7) Immediately after the warning, two signals were sent by the microcontroller. The reading channel is activated simultaneously: (i) 5 ISO 7816 protocol compliant via chip connector (8) ISO via contact reading and (ii) NFC antenna module (6) Contactless reading according to protocol 14443. Obtained from these two channels. The acquired identity data is cross-referenced by the microcontroller. They are compared as follows; 10 from contact and contactless channels. If the data being read matches, it is a pair. Layered hybrid authentication is completing successfully. If there is a discrepancy, the verification is rejected, potentially leading to a mismatch. An additional layer of security against the risk of manipulation or reading errors. The layer is provided. 15 The verification process in question applies to both the primary slot (3) and for the secondary slot (4) independently of each other, however It can be executed in full synchronization when necessary. This thanks to the card reader device (1), in field operations and mobile 20 multi-party authentication in use cases their operations; high signal integrity, low RF interference, uninterrupted visual tracking capability and real-time, low-volume a single unit in conjunction with delayed hardware detection It can be achieved through integrated architecture. 25 Alternative Application Methods In an alternative application of the invention, copper armor (9) not only between chip connectors (8), but also 30 all sensitive around the primary slot (3) and secondary slot (4) It can be extended to surround the signal lines; this In this case, the copper armor (9) is seamless on the main PCB (5). 14 to form a ground ring can be designed. In such an application, both chip connectors Crosstalk between (8) and NFC antenna module (6) origin RF interference is the same as a single integrated armor layer. It can be suppressed instantly. 5 In another alternative application, mechanical sensing tabs (7) not only the physical existence of the card (2), but also At the same time, you can also distinguish whether the card (2) fits fully into the slot. a two-stage switching mechanism that can be used 10 It can be equipped with. In this case, the card (2) first into the slot The first stage is triggered at the entrance, providing preliminary preparation (power-up). the signal is generated, with the card (2) fully seated the second the stage is triggered by the actual hardware interrupt (hardware The interrupt signal is transmitted to the microcontroller. These two 15 step-by-step approach, incorrect or missing insertion of the card (2) to prevent erroneous reading attempts in this situation It provides. In addition, the main PCB (5) 20 of the primary slot (3) and secondary slot (4) The asymmetrical placement angle on it, the use of the device (1) depending on its purpose (e.g., fixed desktop usage or (portable handheld terminal usage) different geometric It can be optimized with values; in this context, 1.65 mm Y Although axis shifting is the preferred application, 25 This does not constitute a binding limitation. Similarly, The three alternatives mentioned above for copper armor (9) Material / structure (Mu-Metal sheet, Kapton coated copper tape, via (stitching-supported SMT shielding cans) can be combined with each other It can also be used by; for example, chip connectors (8) 30 While Mu-Metal plate is used between them, NFC antenna module (6) Kapton coated copper tape between the chip connector (8) preferable. Finally, the microcontroller of the card reader device (1), cross-referenced data obtained in the dual-layer hybrid verification process The comparison result is displayed on a screen located on the device (1), Via LED indicator or wireless communication module 5 that can be transmitted to the user or to a central server It is configurable; this allows for real-world applications in field operations. Instant reporting of timely authentication result it also becomes possible.

Claims

16 REQUESTS 1. Located on the main PCB (5), one of each a primary slot (3) containing a chip connector (8) and a a card reader device (1) containing a secondary slot (4), 5 its feature; to the primary slot (3) and secondary slot (4) belonging to the chip connectors (8), during data transmission electromagnetic interference that may occur between them In order to reduce (crosstalk), on the main PCB (5) The reason is that they are positioned asymmetrically relative to each other. 10 2. According to claim 1, a card reader device (1) has the following features: main PCB (5), primary slot (3), secondary slot (4), NFC antenna module (6) and the slots (3, 4) It contains chip connectors (8), data transmission of the chip connectors (8) 15 electromagnetic interference (crosstalk) during To reduce asymmetrical on the main PCB (5) being positioned at distances, formed between the chip connectors (8) capacitive and inductive coupling noise 20 between connectors (8) to prevent placed and connected to the ground (GND) line of the main PCB (5) it must include at least one copper armor (9), and At the entrance of the slots (3, 4), the card (2) By physically moving the input, the main PCB 25 (5) instantaneous hardware to the microcontroller on it mechanical sensing claws that send warnings (7) It includes.

3. Card reader device (1) connected to Claim 1 or Claim 2, Feature; primary slot (3) and secondary slot (4) chip 30 connectors (8) along the Y-axis on the main PCB (5) shifted relative to each other, with a distance of 1.65 mm between them. It is its positioning. 17 4. According to claim 2, the card reader device is (1) and its feature is; word The subject of the copper armor (9) is a Mu-Metal plate, covered with Kapton insulating film coated copper conductive tape or main PCB (5) grounded on and via stitching 5 from a supported SMT metal armor wall (shielding can) It is the formation of.

5. Card reader device (1) according to Claim 2 or Claim 4, feature; high emitted by NFC antenna module (6) frequency RF waves on the chip connectors (8) To prevent interference, NFC antenna module (6) 10 at least one placed between the chip connectors (8) It contains copper armor (9).

6. Card reader device (1) according to Claim 1 or Claim 2, The feature is that the primary slot (3) and secondary slot (4) have cards (2) When inserted, the visual identification information on the card (2) is 15 and photos, user's device (1) usage uninterrupted from the direct line of sight during has a viewing angle that will allow it to be read as It is the fact that.

7. According to claim 2, the card reader device is (1) and its feature is; 20 triggered by means of mechanical sensing claws (7) Following the hardware warning, the device (1) both chip connector (8) contact reading and NFC antenna module (6) By reading the data contactlessly, it is transmitted in real time. 25 comparing a dual-layer hybrid validation architecture It is having.

8. The card reader device (1) is connected to Request 7 and its feature is: Generating a power-up signal in the first stage, Hardware cut-off with full seating of the card (2) in the second stage For the signal to be transmitted to the microcontroller; mechanical 30 sensing tabs (7), inserting the card (2) into the slot (3, 4) in a way that can distinguish its movement in two stages It is structured. 18 9. Is there an authentication method (1) in a card reader device? feature; by the card (2) entering its own slot (3, 4) as a result of the movement of the mechanical sensing claw (7) hardware interrupt to microcontroller (hardware 5) (interrupt) warning is sent, the hardware interrupt warning and the chip Contact reading via connector (8) and NFC antenna Contactless reading processes via module (6) timed start, 10 data obtained from contact and contactless channels cross by microcontroller steps for verification by comparison It includes.

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