KR20160040484A - Magnetic field booster for mobile magnetic data transmission - Google Patents

Abstract

BACKGROUND OF THE INVENTION 1. Field of the Invention The present invention relates to a magnetic booster for mobile magnetic data transmission and, in a mobile magnetic data transmission system using a magnetic security transmission (MST) or voice coil, a weak magnetic field of a MST H / The present invention relates to a POS terminal and a mobile terminal that are located on a magnetic field transmission path of a POS terminal and a mobile terminal, A pickup coil for picking up a first magnetic field and a pickup amplifier for amplifying a current induced in the magnetic field pickup coil by the first magnetic field; A power amplifier for amplifying an output signal of the pickup amplifier; And a magnetic field emission coil for providing the amplified second magnetic field generated by the power output from the power amplifier to the magnetic head of the POS terminal.

Description

[0001] Magnetic field booster for mobile magnetic data transmission [

BACKGROUND OF THE INVENTION 1. Field of the Invention The present invention relates to a magnetic booster for mobile magnetic data transmission and, in a mobile magnetic data transmission system using a magnetic security transmission (MST) or voice coil, a weak magnetic field of a MST H / The present invention relates to a magnetic booster for mobile magnetic data transmission, which solves the problem that data transmission is not performed smoothly due to a distance to a magnetic head of a terminal.

 A technique of storing magnetic strip data of a credit card or the like in a mobile device and transferring the payment to a magnetic head of a conventional point of sale (POS) terminal through a separate coil for transmission upon settlement is called MST Secure Transmission) technology.

As a background of the MST technique, there is a system and method for a baseband near field magnetic stripe data transmitter of Korean Patent Laid-Open No. 10-2015-0095889 (US 8,690,059 B1, US 8,814,046 B1) shown in FIG. This technology is based on a system for a baseband near field magnetic stripe data transmitter (MST) device that transmits payment card data from a smartphone or other electronic device to a point of sale (POS) transaction terminal And method, wherein the MST device includes a driver and an inductor, the MST receives the magnetic stripe data including the payment card data, processes the received magnetic stripe data, and generates a high energy magnetic stripe containing the processed magnetic stripe data And the processed magnetic stripe data is received remotely by the magnetic strip reader of the POS.

FIG. 2 shows the configuration of the above-mentioned Magnetic Secure Transmission (MST) technology. The magnetic security transmission (MST) technique includes providing an MST unit having an MST coil in the mobile device 200 and driving the magnetic strip data of the credit card from the mobile device 200 through the MST unit as an MST coil to generate a magnetic field magnetic field. At this time, the magnetic field generated from the MST coil is track data of the credit card, and the magnetic field is transmitted to the magnetic head of the POS (point of sale) terminal 100 close thereto. Thus, a signal similar to a direct swipe of a credit card is transmitted to the magnetic head of the POS terminal 100, thereby performing a non-contact wireless settlement. The MST (Magnetic Secure Transmission) technology described above has an advantage that it can be used as it is without changing the POS terminal 100 and the settlement system in which a conventional credit card magnetic strip is swiped . On the other hand, a mobile device having no driving hardware, including an MST unit and an MST coil, has a limitation that self-security transmission is impossible. Also, depending on the structure of the POS terminal 100, if the distance from the MST coil to the magnetic head is long, self-security transmission may not be possible.

FIG. 3 shows a configuration of a mobile magnetic data transmission system using the voice coil of Korean Patent Laid-Open Publication No. 10-2016-0023750 and a method thereof, as a technology of the applicant and the inventor of the present invention. This technology relates to a magnetic data transmission system using a voice coil of a mobile device that enables magnetic data transmission even in a mobile device not including an MST hardware including an MST (Magnetic Secure Transmission) unit and an MST coil, and a method thereof A magnetic data transmission system using a voice coil of a mobile device that performs magnetic data transmission by transmitting data from a mobile device to a magnetic field by using a voice coil or an external voice coil provided in an ear speaker of the mobile device, Method. However, this technique also may cause a problem that the magnetic field provided from the voice coil or the external voice coil is not sufficiently reached when the distance from the outside of the POS terminal 100 to the magnetic head is long.

KR 10-2016-0023750 A KR 10-2015-0095889 A KR 10-2015-0103688 A WO 2010111130 A2 US 8690059 B1 US 8814046 B1

 ISO / IEC 7811 series 'Identification cards'  ISO / IEC 7813: 2006, Information technology - Identification cards - Financial transaction cards

BACKGROUND OF THE INVENTION 1. Field of the Invention The present invention relates to a magnetic booster for mobile magnetic data transmission and, in a mobile magnetic data transmission system using a magnetic security transmission (MST: Magnetic Secure Transmission) or voice coil, a MST H / W to a weak magnetic field of a voice coil, the present invention provides a magnetic booster for mobile data transmission, which solves the problem that data transmission is not performed smoothly due to a separation distance to a magnetic head of a point-of-sale terminal.

The present invention relates to a mobile terminal for providing mobile data transmission between a POS terminal that receives data by swiping a magnetic strip and a mobile device 200 that provides data to the POS terminal 100 in a mobile magnetic data transmission system, A magnetic field pickup coil (310) located on a magnetic field transmission path of the POS terminal (100) and the mobile device (200) for picking up a weak first magnetic field provided from the mobile device (200) A pickup amplifier 320 for amplifying a current induced in the magnetic field pickup coil 310 by a first magnetic field; A power amplifier 330 for amplifying an output signal of the pick-up amplifier 320; And a magnetic field emission coil (340) for providing the amplified second magnetic field generated by the power output from the power amplifier (330) to the magnetic head of the POS terminal (100). Provide the self booster as a solution to the problem.

The magnetic booster for mobile magnetic data transmission according to the present invention can be applied to a mobile magnetic data transmission system using a magnetic security transmission (MST: Magnetic Secure Transmission) or a voice coil, in which a weak magnetic field of a MST H / W to a voice coil, of sale) provides a technical effect of smooth data transmission even if there is a distance to the magnetic head of the terminal.

In addition, by increasing the sensitivity of the magnetic field pickup coil and the pickup amplifier, it is possible to expand the mobile magnetic data transmission area.

FIG. 1 illustrates a system and method for a baseband near field magnetic stripe data transmitter as a background art.
FIG. 2 is a block diagram of a configuration of a magnetic secure transmission (MST)
FIG. 3 shows a mobile magnetic data transmission system using a voice coil as another background art and a configuration of the method technology
FIG. 4 is an example of a data structure of a credit card having a magnetic stripe;
5 shows the track 2 data structure of the credit card.
FIG. 6 is a waveform diagram illustrating transmission of magnetic strip data of a credit card to a POS terminal;
7 shows a schematic configuration of a magnetic booster for mobile magnetic data transmission according to the present invention
8 is an example of a magnetic field pickup coil and a pickup amplifier circuit according to the present invention;
Fig. 9 is an example of a power amplifier and a magnetic-field emission coil circuit according to the present invention
10 is an embodiment of the arrangement relationship of the internal configuration of the magnetic booster for mobile magnetic data transmission of the present invention
FIG. 11 is an embodiment of a mounting relation of a magnetic booster for mobile magnetic data transmission according to the present invention
12 shows an example of use of the magnetic booster for mobile magnetic data transmission according to the present invention

The following merely illustrates the principles of the invention. Accordingly, those skilled in the art will be able to devise various apparatuses which, although not explicitly described or shown herein, embody the principles of the invention and are included in the concept and scope of the invention. Furthermore, all of the conditional terms and embodiments listed herein are, in principle, intended only for the purpose of enabling understanding of the concepts of the present invention, and are not intended to be limiting in any way to the specifically listed embodiments and conditions .

It is also to be understood that the detailed description, as well as the principles, aspects and embodiments of the invention, as well as specific embodiments thereof, are intended to cover structural and functional equivalents thereof. It is also to be understood that such equivalents include all elements contemplated to perform the same function irrespective of currently known equivalents as well as equivalents to be developed in the future. Thus, the functions of the various elements shown in the drawings, including the functional blocks shown in the control or similar concepts, may be provided by use of dedicated hardware as well as hardware capable of executing software in connection with appropriate software. The functions provided by the " control unit " may be provided by a single dedicated processor, a single shared processor, or a plurality of individual processors, some of which may be shared. In addition, the use of terms presented in a concept similar to the control unit should not be interpreted exclusively as hardware capable of executing software, but may be embodied in various forms, including without limitation, a digital signal processor (DSP) (ROM), random access memory (RAM), and non-volatile memory. Other hardware may also be included.

The above objects, features and advantages will become more apparent from the following detailed description in conjunction with the accompanying drawings. DETAILED DESCRIPTION OF THE PREFERRED EMBODIMENTS In the following description of the present invention, detailed description of known related arts will be omitted when it is determined that the gist of the present invention may be unnecessarily obscured. Hereinafter, preferred embodiments of the present invention will be described in detail with reference to the accompanying drawings.

The magnetic booster for mobile magnetic data transmission according to the present invention can be applied to all channels for transmitting data using a magnetic field. Hereinafter, in order to clarify the characteristic configuration of the present invention, for example, Explain.

FIG. 4 illustrates an example of a data structure of a credit card having a magnetic stripe. The credit card is specified by the International Standard Organization (ISO) standard ISO / IEC 7810, ISO / IEC 7811, ISO / IEC 7813, etc. The data recording standard of the magnetic strip is IATA, ABA, Thrift We use the proposed three tracks. Among these tracks, the credit card uses Track 1 and the financial institution uses Track 2. It can be seen that the number of bits stored in each track is 553 bits for track 1, 200 bits for track 2, and 535 bits for track 3. When the track passes through a magnetic head for reading a magnetic stripe, the frequency band of each track becomes an audible frequency, so that the signal is within a voice band (~ 4 KHz). For example, if the three tracks of the strip pass through the magnetic head for 0.5 seconds, the data rate is read with a signal of 1,106 bit / sec, 400 bit / sec and 1,070 bit / sec for each track, do.

As shown in FIG. 5, the track 2 data of the credit card read through the card reader for settlement includes: A field separator (FS) field in which a field delimiter " ^ " is recorded, an expiration date field, and an expiration date field, in which a start sentence area in which a start character of credit card data is recorded, An additional data field in which a service code is recorded, a discretionary data field in which data of a card issuing company such as a card validation code (CVC) is recorded, and a character for identifying the end of the credit card data are recorded ES (end sentinal), and a redundancy check character LRC (logitudinal redundancy check character) field.

FIG. 6 illustrates a waveform relationship in which magnetic strip data of a credit card is transmitted to a POS terminal as an example of mobile magnetic data transmission. The magnetic booster for mobile magnetic data transmission according to the present invention can be applied to all channels for transmitting data using a magnetic field. Hereinafter, in order to clarify the characteristic configuration of the present invention, for example, Explain.

(A) of the drawing shows the head portion of the credit card data described in the previous figures 4 to 5. (B) of the drawing shows the magnetization direction of the magnetic strip corresponding to the drawing (a), and FIG. 7 (c) shows the current output from the magnetic head when sweeping the magnetic strip to the POS terminal 100 FIG. The magnetic stripe data of the credit card is recorded and reproduced in a biphase mark coding manner and is also referred to as a frequency / double frequency (F2F) or an Aiken biphase method. The magnetic strip data includes clocking bits of a column, and distinguishes '0' and '1' based on the intervals of the clocking bits. '0' bits of data are recorded by giving transition from '0' to '1' or '1' to '0' so as to be reversed with respect to the previous data at intervals of the clocking bit, Are recorded such that a transition is made within the interval of the clocking bits. Accordingly, the POS terminal 100 sets a value of '0' to '1' or '1' to '0' for each pulse of the current waveform of the diagram (c) 0 'when transition is made to the previous data at the interval of the clocking bit, and' 1 'when transition is made to the previous data within the interval of the clocking bit, as shown in (d) The card data can be read out.

In a mobile magnetic data transmission system using a magnetic coil (MST) or a voice coil for transferring card data from the outside of a point of sale (POS) terminal by magnetic fields, / W to voice coil in a limited magnetic field, and the distance between the magnetic head and the magnetic head of POS (point of sale) terminal is not smooth.

FIG. 7 shows a general configuration of a magnetic booster for mobile magnetic data transmission of the present invention. The self booster for mobile magnetic data transmission according to the present invention includes a POS terminal 100 for receiving data by sweeping a magnetic strip, a mobile terminal using MSS (Secure Secure Transmission) A mobile device (200) for providing data to the POS terminal (100) as a magnetic data transmission system, a magnetic field pick-up device for picking up a weak first magnetic field provided from the mobile device (200) A coil 310 and a pickup amplifier 320 for amplifying a current induced in the magnetic field pickup coil 310 by the first magnetic field; A power amplifier 330 for amplifying an output signal of the pick-up amplifier 320; And a magnetic field emission coil 340 for providing the amplified second magnetic field generated by the power output from the power amplifier 330 to the magnetic head of the POS terminal 100.

FIG. 8 shows an example of a magnetic field pickup coil 310 and a pickup amplifier 320 circuit of a magnetic booster for mobile magnetic data transmission according to the present invention. The magnetic field pickup coil 310 of the present invention picks up a weak first magnetic field provided from the mobile device 200 by current. At this time, the magnetic field pickup coil 310 detects a slight magnetic field variation as the impedance increases, while the voltage appearing across the magnetic field pickup coil 310 due to the current induced by the variation of the magnetic flux causes the current Since the derivative is a time-dependent value, the waveform is deformed. Therefore, the variation of the magnetic field provided to the magnetic field pickup coil 310 of the present invention includes a pickup amplifier 320 composed of a current amplifier, and the resistance R1, which is the same as the impedance of the magnetic field pickup coil 310, And connected to both ends of the coil 310 to constitute an input terminal. Therefore, the pickup amplifier 320 of the present invention amplifies a current induced to both ends of the magnetic field pickup coil 310 and provides it as an output.

FIG. 9 shows an example of a power amplifier 330 and a magnetic field emission coil 340 circuit of a magnetic booster for mobile magnetic data transmission according to the present invention. The power amplifier 330 of the present invention receives the output of the pickup amplifier 320 described in FIG. 8 to amplify the power, and sends out the magnetic field enhanced as the magnetic field delivery coil 340. The power amplifier 330 shown in FIG. 4 is a circuit in which an input terminal is constituted by a differential amplifier and an output terminal is constituted by a push-pull system, and the output of the pickup amplifier 320 is adjusted by VR1. Since the signal transmitted from the mobile to the magnetic field is data of 1 and 0, the power amplifier 330 may be configured to amplify to the saturation region of Tr11 and Tr13 between the applied power source V + and GND.

Also, the magnetic field delivery coil 340 can be configured to generate a stronger magnetic field by applying a coil having a low impedance of several [Ohm] to several tens [Ohm] to a limited power source.

FIG. 10 shows one embodiment of the arrangement relationship of the internal configuration of the magnetic booster for mobile magnetic data transmission of the present invention. A magnetic booster for mobile magnetic data transmission according to the present invention includes: a housing 360 having a non-magnetic body through which a magnetic field passes; and a power terminal 370 for supplying power to an internal circuit; And a housing cover (380); a magnetic field delivery coil (340) disposed on one side within the housing (360) opposite to the POS terminal (100); And a power amplifier 330 for driving the magnetic field delivery coil 340 to transmit the amplified magnetic field. A magnetic field pick-up coil 310 for picking up a weak first magnetic field provided from the mobile device 200 by current, on the other side of one side of the housing 360 opposite to the POS terminal 100; A pickup coil 340 which is disposed on one side of the housing 360 and a magnetic field pickup coil 340 which is provided on the other side of the pickup 360. The pick- And a magnetic shielding plate 350 disposed between the first and second magnetic shielding plates 310 and 310 to magnetically shield the magnetic field sent to the magnetic field delivering coil 340 from being transmitted to the magnetic field pickup coil 310, 2 Prevents interference and interference between magnetic fields.

FIG. 11 shows an embodiment of the mounting relationship of the magnetic booster for mobile magnetic data transmission according to the present invention. A magnetic booster for mobile magnetic data transmission according to the present invention includes: a housing 360 having a non-magnetic body through which a magnetic field passes; and a power terminal 370 for supplying power to an internal circuit; And a housing cover 380. A magnetic field delivery coil 340 and a power amplifier 330 are disposed on one side of the housing 360 facing the POS terminal 100 inside the housing 360, A magnetic field pickup coil 310 and a pickup amplifier 320 are disposed on the other side of the one side of the POS terminal 360 opposite to the POS terminal 100. A magnetic field emission coil 340 disposed on one side of the housing 360, And a magnetic shielding plate (350) provided between the magnetic field pickup coil (310) and the magnetic field pickup coil (310). The output of the pick-up amplifier 320 is connected to the input of the power amplifier 330 and the power terminals of the pick-up amplifier 320 and the power amplifier 330 are connected to a power terminal 370 of the housing 360 Power is supplied from the outside.

FIG. 12 shows the use of a magnetic booster for mobile magnetic data transmission of the present invention. The magnetic booster for mobile magnetic data transmission according to the present invention includes a POS terminal 100 that sweeps a magnetic strip and receives data, and a mobile magnetic data transmission system that provides data to the POS terminal 100 A magnetic field pickup coil (not shown) which is located on a magnetic field transmission path between the mobile device 200 and the mobile device 200 of the magnetic booster 300 and picks up a weak first magnetic field provided from the mobile device 200 310 and a pickup amplifier 320 for amplifying a current induced in the magnetic field pickup coil 310. The POS terminal 100 of the magnetic booster 300 further includes a power amplifier 330 for amplifying an output signal of the pick-up amplifier 320 and a second magnetic field amplifier 330 amplified by a power output from the power amplifier 330, To the magnetic head of the POS terminal (100).

A magnetic shielding plate 350 is provided between the magnetic field delivery coil 340 and the magnetic field pickup coil 310 to prevent interference and interference between the first magnetic field and the second magnetic field.

The magnetic booster for mobile magnetic data transmission according to the present invention described above can be applied to a mobile magnetic data transmission system using a magnetic security transmission (MST: Magnetic Secure Transmission) or a voice coil, the present invention overcomes the problem that the data transmission is not smooth due to the distance between the magnetic head and the magnetic head of the point-of-sale terminal, and also increases the sensitivity of the magnetic field pickup coil and the pickup amplifier in the mobile magnetic data transmission system, Thereby providing an effect of expanding the area.

Although the magnetic booster technology for mobile magnetic data transmission of the present invention has been described with reference to the limited embodiments and drawings, the present invention is not limited thereto, and the magnetic booster technology of the present invention It will be understood by those skilled in the art that various changes in form and details may be made therein without departing from the spirit and scope of the present invention as defined by the appended claims.

100: POS terminal 200: mobile device
300: magnetic booster 310: magnetic field pickup coil
320: Pickup amplifier 330: Power amplifier
340: magnetic field emission coil 350: magnetic shield plate
360: housing 370: power terminal
380: Housing cover

Claims (6)

A magnetic booster for transferring mobile magnetic data between a POS terminal 100 receiving data by sweeping a magnetic strip and a mobile device 200 providing data to the POS terminal 100 in a mobile magnetic data transmission system, In this case,
Is located on the magnetic field transmission path of the POS terminal (100) and the mobile device (200)
A magnetic field pickup coil 310 for picking up a weak first magnetic field provided from the mobile device 200;
A pickup amplifier 320 for amplifying a current induced in the magnetic field pickup coil 310 by the first magnetic field;
A power amplifier 330 for amplifying an output signal of the pick-up amplifier 320;
A magnetic field emission coil 340 for providing the amplified second magnetic field generated by the power output from the power amplifier 330 to the magnetic head of the POS terminal 100;
Characterized in that it comprises a magnetic booster for mobile magnetic data transmission
The pickup amplifier according to claim 1,
And the magnetic field pickup coil (310) is configured to current-amplify the variation of the magnetic field induced by the magnetic field pickup coil (310)
The magnetic field delivery coil (340) according to claim 1,
And is configured to be shielded by the magnetic field pickup coil (310) and the magnetic shield plate (350) to prevent interference and interference between the first magnetic field and the second magnetic field.
A magnetic booster for transferring mobile magnetic data between a POS terminal 100 receiving data by sweeping a magnetic strip and a mobile device 200 providing data to the POS terminal 100 in a mobile magnetic data transmission system, In this case,
A power supply terminal (370) for supplying power to the internal circuit; And a housing cover 380,
A magnetic field delivery coil (340) disposed at one side in the housing (360) opposite to the POS terminal (100);
A power amplifier 330 for driving the magnetic field emission coil 340 to emit the amplified magnetic field;
A magnetic field pickup coil 310 positioned on the other side of one side of the housing 360 opposite to the POS terminal 100 to pick up a weak first magnetic field provided from the mobile device 200 by current;
And a pickup amplifier (320) for amplifying variation of a magnetic field provided to the magnetic field pickup coil (310)
A magnetic field emitted to the magnetic field delivery coil 340 is transmitted to the magnetic field pickup coil 310 between the magnetic field pickup coil 310 provided on the other side of the magnetic field delivery coil 340 disposed on one side of the housing 360 A magnetic shield plate 350 magnetically shielded from being transmitted;
Characterized in that it comprises a magnetic booster for mobile magnetic data transmission
The apparatus of claim 4, wherein the housing (360); And the housing cover 380,
Magnetic body through which a magnetic field is passed.
5. The apparatus of claim 4, wherein the pickup amplifier (320)
The output of the pick-up amplifier 320 is connected to the input of the power amplifier 330
And a power supply terminal of the power amplifier 330 is connected to the power supply terminal 370 of the housing 360 to receive power from the outside.

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