WO2013118183A1 - Lecteur de carte magnétique et procédé de lecture de carte magnétique - Google Patents

Lecteur de carte magnétique et procédé de lecture de carte magnétique Download PDF

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Publication number
WO2013118183A1
WO2013118183A1 PCT/JP2012/000872 JP2012000872W WO2013118183A1 WO 2013118183 A1 WO2013118183 A1 WO 2013118183A1 JP 2012000872 W JP2012000872 W JP 2012000872W WO 2013118183 A1 WO2013118183 A1 WO 2013118183A1
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WO
WIPO (PCT)
Prior art keywords
magnetic
magnetic card
reading
unit
information
Prior art date
Application number
PCT/JP2012/000872
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English (en)
Japanese (ja)
Inventor
昌浩 芳井
Original Assignee
日立オムロンターミナルソリューションズ株式会社
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Priority to PCT/JP2012/000872 priority Critical patent/WO2013118183A1/fr
Publication of WO2013118183A1 publication Critical patent/WO2013118183A1/fr

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    • G—PHYSICS
    • G06—COMPUTING; CALCULATING OR COUNTING
    • G06K—GRAPHICAL DATA READING; PRESENTATION OF DATA; RECORD CARRIERS; HANDLING RECORD CARRIERS
    • G06K13/00—Conveying record carriers from one station to another, e.g. from stack to punching mechanism
    • G06K13/02—Conveying record carriers from one station to another, e.g. from stack to punching mechanism the record carrier having longitudinal dimension comparable with transverse dimension, e.g. punched card
    • G06K13/07—Transporting of cards between stations
    • G06K13/077—Transporting of cards between stations with intermittent movement; Braking or stopping movement
    • G—PHYSICS
    • G06—COMPUTING; CALCULATING OR COUNTING
    • G06K—GRAPHICAL DATA READING; PRESENTATION OF DATA; RECORD CARRIERS; HANDLING RECORD CARRIERS
    • G06K7/00—Methods or arrangements for sensing record carriers, e.g. for reading patterns
    • G06K7/08—Methods or arrangements for sensing record carriers, e.g. for reading patterns by means detecting the change of an electrostatic or magnetic field, e.g. by detecting change of capacitance between electrodes
    • G06K7/082—Methods or arrangements for sensing record carriers, e.g. for reading patterns by means detecting the change of an electrostatic or magnetic field, e.g. by detecting change of capacitance between electrodes using inductive or magnetic sensors
    • G06K7/083—Methods or arrangements for sensing record carriers, e.g. for reading patterns by means detecting the change of an electrostatic or magnetic field, e.g. by detecting change of capacitance between electrodes using inductive or magnetic sensors inductive
    • G06K7/084—Methods or arrangements for sensing record carriers, e.g. for reading patterns by means detecting the change of an electrostatic or magnetic field, e.g. by detecting change of capacitance between electrodes using inductive or magnetic sensors inductive sensing magnetic material by relative movement detecting flux changes without altering its magnetised state

Definitions

  • the present invention relates to a technology for reading information recorded on a magnetic card.
  • noise from the disturbance magnetic field generator may be mixed in the magnetic signal detected by the magnetic head, and reading of information may fail. This problem is similarly likely to occur due to external noise even in a magnetic card reader not equipped with a disturbing magnetic field generator.
  • the present invention has been made to solve at least a part of the above-mentioned conventional problems, and it is an object of the present invention to prevent reading failure of information due to noise.
  • the present invention can take the following forms or application examples in order to solve at least a part of the problems described above.
  • a magnetic card reader for reading information recorded on a magnetic card, comprising: A magnetic detection unit for detecting a magnetic signal from the magnetic card being transported; A transport unit that transports the magnetic card relative to the magnetic detection unit; A first control unit that reads the information by receiving the magnetic signal from the magnetic detection unit while conveying the magnetic card by the conveyance unit at a first speed; Optionally, the information reading is performed by receiving the magnetic signal from the magnetic detection unit while conveying the magnetic card by the transport unit at a second speed higher than the first speed. And a second control unit to perform the magnetic card reader.
  • the second control unit additionally conveys the magnetic card at a speed higher than the conveyance speed by the first control unit, as needed, to read information. Do.
  • the transport speed of the magnetic card becomes high, the level of the magnetic signal detected by the magnetic detection unit increases, while the noise mixed in the magnetic signal does not increase. Therefore, it is possible to prevent reading failure of information due to noise.
  • the second control unit is A determination unit that determines whether the information read by the first control unit is normal;
  • a magnetic card reader comprising: an execution limiting unit that causes the magnetic card to be transported and the magnetic signal is received when the determination unit determines that the information is not normal.
  • the second control unit when the information read by the first control unit is not normal, the second control unit reads the information. Therefore, failure in reading information due to noise can be further prevented.
  • the second control unit is The magnetic card further includes a write level determination unit that determines whether the write level of the information on the magnetic card falls below a predetermined value
  • the execution limiting unit is When the determination unit determines that the information is not normal and the write level determination unit determines that the write level is less than the predetermined value, conveyance of the magnetic card and reception of the magnetic signal are performed.
  • a magnetic card reader comprising: an execution limiting unit.
  • the determination unit determines that the information is not normal is highly likely that reading has failed due to reasons other than noise.
  • the reading process by the second control unit can be limited to the case where the write level of the information on the magnetic card is low, when the write level of the information on the magnetic card is high, It is possible to avoid reading by high-speed transport which is less effective. Therefore, the execution time of reading information is not unnecessarily extended.
  • the magnetic detection unit Detecting a magnetic signal from each of the plurality of tracks of the magnetic card;
  • the second control unit is The magnetic detection unit includes a character generation unit that receives a magnetic signal for each track from the magnetic detection unit, detects a peak for each of the magnetic signals, and generates character data based on the interval of the peaks.
  • the character generation unit A peak determination unit that determines whether or not the detected peaks occur at the same timing in all of the plurality of tracks; And a peak interval calculation unit for determining intervals of the peaks by invalidating the peaks determined to have occurred at the same timing by the peak determination unit.
  • the plurality of tracks of the magnetic card are not all recorded at the same recording density, and some tracks are recorded at a recording density different from that of the other tracks.
  • the peaks of the magnetic signal are not inherently at the same timing.
  • the peak interval calculation unit invalidates the peaks determined to have occurred at the same timing by the peak determination unit and determines the interval of the peaks. The influence of noise can be eliminated. Therefore, failure in reading information due to noise can be further prevented.
  • the transport unit transports the magnetic card in the forward direction, and then transports the magnetic card in the return direction.
  • the first control unit is Reading the information during the first transport in the forward direction and the transport in the return direction;
  • the second control unit is A magnetic card reader, which reads the information at the second transport in the forward direction and at the transport in the return direction.
  • the reading of the magnetic card can be performed by the first forward pass and return pass, and the second forward pass and return pass. Therefore, failure to read information can be further prevented.
  • the transport unit transports the magnetic card in the forward direction, and then transports the magnetic card in the return direction.
  • the first control unit is Reading the information at the time of conveyance in the forward direction;
  • the second control unit is The magnetic card reader which reads the information at the time of conveyance of the return direction.
  • the reading of the magnetic card can be performed in the forward pass and the return pass. Therefore, failure to read information can be further prevented.
  • a magnetic card reader for reading information recorded on a plurality of tracks of a magnetic card, comprising: A magnetic detection unit that detects a magnetic signal for each track; A character generation unit that receives a magnetic signal for each track from the magnetic detection unit, detects a peak for each of the magnetic signals, and generates character data based on an interval between the peaks.
  • the character generation unit A peak determination unit that determines whether or not the detected peaks occur at the same timing in all of the plurality of tracks; And a peak interval calculation unit for determining intervals of the peaks by invalidating the peaks determined to have occurred at the same timing by the peak determination unit.
  • the peak interval calculation unit invalidates the peaks determined to have occurred at the same timing by the peak determination unit. Since the peak interval is determined, the magnetic signal can be free from the influence of noise. Therefore, failure in reading information due to noise can be prevented.
  • a magnetic card reading method for reading information recorded on a magnetic card comprising: The computer reads the information by receiving the magnetic signal from a magnetic detection unit that detects a magnetic signal with respect to the conveyed magnetic card while conveying the magnetic card at a first speed, The information may be read by the computer receiving the magnetic signal from the magnetic detection unit while transporting the magnetic card at a second speed exceeding the first speed, as needed. How to read the magnetic card.
  • a magnetic card reading method for reading information recorded on a plurality of tracks of a magnetic card comprising: A computer detecting a magnetic signal for each of the tracks; The computer detects a peak for each of the detected magnetic signals, and generates character data based on the interval of the peaks. In the process of generating the character data, Determining whether the computer has generated the detected peaks at the same timing in all of the plurality of tracks; And D. determining the interval of the peaks by invalidating the peaks determined to have occurred at the same timing in the determining step.
  • the magnetic card reading method of application example 8 as in the magnetic card reading device of application example 1, it is possible to prevent reading failure of information due to noise.
  • the magnetic card reading method of application example 9 as in the magnetic card reading device of application example 7, it is possible to prevent reading failure of information due to noise.
  • the present invention can be realized in various forms other than the above, and for example, an automatic cash transaction processing apparatus provided with the magnetic card reader, an information processing apparatus provided with the magnetic card reader, and the magnetic card reading method
  • the present invention can be realized in the form of a computer program for causing a computer to execute each process included, a recording medium recording the computer program, or the like.
  • FIG. 2 is a block diagram showing an electrical configuration of a magnetic card reader 100. It is a flow chart which shows operation of magnetic card reading. It is a flowchart which shows an outward read process. It is a flow chart which shows magnetic information reading processing. It is a flow chart which shows return pass reading processing. It is a flowchart which shows the outward path
  • FIG. 1 is an explanatory view showing a schematic configuration of a magnetic card reader 100 as a first embodiment of the present invention.
  • the magnetic card reader 100 is mounted on, for example, an automatic cash transaction processing device, and is electrically connected to a host device such as the automatic cash transaction processing device.
  • the magnetic card reader 100 reads the information recorded on the magnetic card 200, and transmits the read information to the host device.
  • the magnetic card reader 100 has a housing 10 and an insertion slot 20 provided at an end of the housing 10.
  • the insertion slot 20 is for inserting the magnetic card 200
  • the insertion slot 20 is provided with a card insertion sensor 22 for detecting that the magnetic card is inserted.
  • the card insertion sensor 22 is configured of, for example, a magnetic head for detecting card insertion.
  • a loop antenna (coil) 24 is provided so as to surround the periphery of the insertion port 20. When a drive signal is applied from both ends of the loop antenna 24 from the oscillator 130 (see FIG. 2), a magnetic field (also referred to as a disturbing magnetic field) generated by the loop antenna 24 is attached to the front of the insertion slot 20. It prevents the exploitation of the magnetic information of the magnetic card 200 (also referred to as a skimming device).
  • first to fourth transport rollers 31 to 34 Inside the housing 10, first to fourth transport rollers 31 to 34, first to third card position sensors 41 to 43, and a magnetic head 50 for reading information are provided.
  • the first to fourth conveyance rollers 31 to 34 are respectively provided in a pair on the upper and lower sides of the conveyance path P, and rotate by rotational driving of a motor 120 (see FIG. 2).
  • the first to fourth transport rollers 31 to 34 transport the magnetic card 200 in the forward direction (direction of arrow F) when the motor 120 is driven to rotate forward, and return the magnetic card 200 when the motor 120 is driven reversely (arrow B Direction).
  • the first to third card position sensors 41 to 43 are, for example, photo interrupters, and detect the position of the magnetic card 200 on the transport path P.
  • the first card position sensor 41 is disposed at a reading preparation position P1 where the magnetic card 200 is made to stand by before reading data from the magnetic card 200, and the magnetic card 200 is transported in the return direction B and When it comes to the position P1, the rear end 202 of the magnetic card 200 is detected and switched from the OFF state to the ON state.
  • the second card position sensor 42 is disposed at the reading start position P2 where the magnetic head 50 starts reading data on the magnetic card 200, and when the magnetic card 200 is transported in the forward direction F and comes to this position P2. The leading end portion 201 of the magnetic card 200 is detected and switched from the OFF state to the ON state.
  • the third card position sensor 43 is disposed at a reading end position P3 at which the magnetic head 50 ends reading data on the magnetic card 200.
  • the leading end portion 201 of the magnetic card 200 is detected and switched from the OFF state to the ON state.
  • the reading start position P2 When reading information on the magnetic card 200 transported in the forward direction F, the reading start position P2 is a reading start position to start reading information, and the reading end position P3 is reading information End position to end reading.
  • the reading start position P2 When reading information on the magnetic card 200 transported in the backward direction B, the reading start position P2 is the reading start position to start reading the information, and the preparation position P1 ends the reading of the information. It becomes the reading end position.
  • the magnetic head 50 is disposed at a position in contact with the conveyed magnetic card 200, and detects a magnetic pattern from a magnetic stripe (not shown) of the magnetic card 200. More specifically, the magnetic head 50 detects the change in the magnetic force of the magnetic stripe by the built-in core and coil, converts it to a change in voltage, and amplifies and outputs the change in voltage by the built-in amplifier.
  • FIG. 2 is a block diagram showing the electrical configuration of the magnetic card reader 100.
  • the magnetic card reader 100 includes a control unit 110 that controls each part of the magnetic card reader 100.
  • the control unit 110 is electrically connected to the various sensors described above, that is, the card insertion sensor 22 and the first to third card position sensors 41 to 43, and is further electrically connected to the magnetic head 50.
  • the control unit 110 is electrically connected to a motor 120 for each of the transport rollers 31 to as an actuator. Further, it is electrically connected to an oscillator 130 that sends a drive signal to the loop antenna 24.
  • the conveying rollers 31 to 34 and the motor 120 correspond to the “conveying unit” in the invention described in the application example 1
  • the magnetic head 50 corresponds to the “magnetic detection unit” in the invention described in the application example 1.
  • the control unit 110 has a known configuration including a CPU, a memory such as a ROM and a RAM, and an input / output interface. With these configurations, the control unit 110 functionally implements the first control unit 112 and the second control unit 114 as illustrated.
  • the second control unit 114 includes a determination unit 114 a and an execution restriction unit 114 b.
  • the units 112 to 114 b are realized by the CPU in cooperation with the memory.
  • the respective units 112 to 114 b can be realized by discrete electronic circuits instead of the configuration including the CPU, the memory, and the like. The functions of the units 112 to 114b will be described in detail below.
  • FIGS. 3 to 8 are flowcharts showing the operation of magnetic card reading by the magnetic card reader 100, and show the process executed by the control unit 110.
  • the CPU provided in the control unit 110 executes the computer program stored in the ROM.
  • FIG. 3 is a flowchart of the whole, and FIGS. 3 to 8 are flowcharts showing a part in detail.
  • the control unit 110 takes in the magnetic card 200 and reads information from the magnetic card 200. Specifically, as shown in FIG. 3, the control unit 110 first performs forward path reading processing (step S110). The details of the forward path reading process are shown in FIG.
  • the control unit 110 first determines whether the card insertion sensor 22 is in the ON state (step S111), and when the card insertion sensor 22 is in the ON state (step S111: YES), the magnetic card It is determined that 200 is inserted, and the motor 120 is driven to rotate normally (step S112). Thereby, the magnetic card 200 is transported in the forward direction F.
  • the transport speed of the magnetic card 200 at this time is a predetermined speed, for example, 200 [mm / sec].
  • this predetermined speed is referred to as "first speed”.
  • step S113 determines whether the second card position sensor 42 is in the ON state (step S113), and when the second card position sensor 42 is in the ON state (step S113: YES), It is determined that the card 200 has been transported to the P2 position, and reading of information from the magnetic card 200 by the magnetic head 50 is started (step S114).
  • the control unit 110 determines whether the third card position sensor 43 is in the ON state (step S115), and when the third card position sensor 43 is in the ON state (step S115: YES), It is determined that the magnetic card 200 has been conveyed to the P3 position, and the reading of information from the magnetic card 200 by the magnetic head 50 is stopped (step S116), and the driving of the motor 120 is stopped (step S117). By stopping the driving of the motor 120, the transport of the magnetic card 200 is stopped. At this point, the forward path reading process ends, and the process of step S110 in FIG. 3 is ended.
  • the reading of information on the magnetic card 200 is performed by the magnetic information reading process shown in FIG.
  • the magnetic information reading process is called and started in step S114 in FIG. 4 and stopped in step S116.
  • the magnetic information reading process sequentially receives a predetermined amount of magnetic signals from the magnetic head 50 and is repeatedly executed for each predetermined amount. Ru.
  • the control unit 110 receives a predetermined amount of magnetic signal from the magnetic head 50 (step S121), and detects a peak from the waveform of the magnetic signal (step S122). Subsequently, control unit 110 generates character data based on the interval of the peaks (step S123). More specifically, voltage waveform data is converted to pulse data as jitter data according to peak intervals, and jitter data is converted to bit data according to the pulse rise and fall intervals of the jitter data. Are converted to character data according to a predetermined format.
  • step S124 the control unit 110 performs processing of checking the validity of the signal waveform, jitter data, bit data, and character data described above (step S124). This processing is to check with various confirmation items, such as whether each data can be detected properly or whether each data falls within a predetermined range, and when the check result is valid (step S125) : Valid) and stores in the RAM that the character data which is the read result is normal (step S126). On the other hand, when the check result is invalid (step S125: invalid), the fact that the character data which is the read result is abnormal is stored in the RAM (step S127). After execution of step S126 or S127, the process returns to "return", and the magnetic information reading process is temporarily ended. The magnetic information reading process is repeatedly performed until the reading of the information is stopped in step S116.
  • the control unit 110 determines whether the read result of the magnetic information is normal (step S128).
  • the character data stored as abnormal in the above-mentioned magnetic information reading process does not exist, it is determined as "normal”, and if the character data stored as abnormal reading is present as "abnormal" Determine that there is.
  • step S128 If it is determined in step S128 that the reading is normal, the control unit 110 ends the magnetic card reading operation on the assumption that the reading of the magnetic card 200 is completed. On the other hand, when it is determined in step S128 that there is an abnormality, control unit 110 advances the process to step S130 to perform return path read processing. In the return path reading process, the magnetic card 200 is moved in the return direction B from the position P3 where the magnetic card 200 is stopped first to read the magnetic card again, the details of which are shown in FIG.
  • the control unit 110 reversely drives the motor 120 (step S131).
  • the magnetic card 200 is transported in the return direction B.
  • the transport speed of the magnetic card 200 at this time is the same first speed as at the time of the return path reading process.
  • step S121 the control unit 110 determines whether the second card position sensor 42 is in the on state (step S132), and when the second card position sensor 42 is in the on state (step S132: YES), It is determined that the card 200 has been transported to the P2 position, and reading of information from the magnetic card 200 by the magnetic head 50 is started (step S133).
  • the control unit 110 determines whether the first card position sensor 41 is in the ON state (step S134), and when the first card position sensor 41 is in the ON state (step S134: YES), It is determined that the magnetic card 200 has been transported to the P1 position, and the reading of information from the magnetic card 200 by the magnetic head 50 is stopped (step S135), and the driving of the motor 120 is stopped (step S136). By stopping the driving of the motor 120, the transport of the magnetic card 200 is stopped. At this point, the return path reading process is completed, and the process of step S130 in FIG. 3 is ended.
  • the reading of the information to the magnetic card 200 described above is performed by the magnetic information reading process shown in FIG. 5 as in the forward path reading process.
  • step S130 The reading of the magnetic information is performed again in the return path reading process of step S130 because the possibility of normally reading the magnetic information is increased by switching the transport direction to the return direction B.
  • the control unit 110 functions as the first control unit 112 of FIG.
  • step S138 the control unit 110 determines whether or not the result of reading the magnetic information is normal (step S138). This determination is the same as the determination in step S128, and is determined in response to the check result in the magnetic information reading process (FIG. 5). In the process of step S138, the control unit 110 functions as the determination unit 114 of FIG.
  • step S138 If it is determined in step S138 that the operation is normal, the control unit 110 ends the magnetic card reading operation. On the other hand, when it is determined in step S138 that the state is not normal, the control unit 110 advances the process to step S140 and performs forward path reading processing by high-speed conveyance.
  • FIG. 7 is a flowchart showing the forward path reading process by the high-speed conveyance performed in step S140.
  • the control unit 110 first drives the motor 120 in the forward direction (step S141).
  • the magnetic card 200 is transported in the forward direction F from the position P1 at which the magnetic card 200 first stopped.
  • the motor 120 is driven such that the transport speed of the magnetic card 200 at this time is a second speed, eg, 300 [mm / sec], which exceeds the above-described first speed.
  • the numerical values of the first speed and the second speed are merely an example, and it is not necessary to be limited to this, and it is possible to set other numerical speeds if the relation of first speed ⁇ second speed is satisfied.
  • step S141 After execution of step S141, the same steps S113 to S117 as in the forward path reading process of FIG. 4 are executed, and the forward path reading process is ended. Thereby, the process of step S140 of FIG. 3 is ended.
  • step S140 the control unit 110 determines whether or not the result of reading the magnetic information is normal (step S148). This determination is the same as the determination in step S128, and is determined in response to the check result in the magnetic information reading process (FIG. 5).
  • step S148 If it is determined in step S148 that the operation is normal, the control unit 110 ends the magnetic card reading operation. On the other hand, when it is determined in step S148 that it is not normal, the control unit 110 advances the process to step S150 to perform return path read processing by high-speed conveyance.
  • FIG. 8 is a flowchart showing the return path reading process by high-speed transport performed in step S150.
  • the control unit 110 reversely drives the motor 120 (step S151).
  • the magnetic card 200 is transported in the return direction B from the position P3 at which the magnetic card 200 first stopped.
  • the motor 120 is driven such that the transport speed of the magnetic card 200 at this time is the second speed described above.
  • step S151 steps S132 to S136 which are the same as the return path reading process of FIG. 6 are executed, and the return path reading process is ended.
  • step S150 of FIG. 3 the control unit 110 functions as the second control unit 114 in FIG.
  • the control unit 110 functions as the determination unit 114a of FIG.
  • the control unit 110 functions as the execution limiting unit 114 b in FIG. 2 in the processing from step S 138 determined as NO to step S 150.
  • step S158 the control unit 110 determines whether the result of reading the magnetic information is normal (step S158). This determination is the same as the determination in step S128, and is determined in response to the check result in the magnetic information reading process (FIG. 5).
  • step S158 If it is determined in step S158 that the operation is normal, the control unit 110 ends the operation of reading the magnetic card. On the other hand, if it is determined in step S158 that the reading is not normal, an error notification indicating that reading of the magnetic card 200 has failed is performed (step S160), and the operation of reading the magnetic card is ended. This error notification is issued to the higher-level device.
  • FIG. 9 is an explanatory view showing the waveform of the magnetic signal S1 output from the magnetic head 50 and the noise NZ.
  • FIG. 9A shows the waveform of the magnetic signal S1 when no noise is mixed
  • FIG. 9B shows the waveform of the magnetic signal S1 when the noise NZ is mixed.
  • the output level of the magnetic signal S1 output from the magnetic head 50 is 100%.
  • the noise NZ is mixed in the magnetic field (or another factor from the outside) by the loop antenna 24, the waveform of the magnetic signal S1 shown in FIG. 9B is obtained. In this case, reading of the magnetic information does not fail because the level of the magnetic signal S1 is larger than the level (amplitude) of the noise NZ.
  • the transport speed when transporting the magnetic card 200 by the second control unit 116 is higher than that when the first control unit 112 transports the magnetic card 200. doing.
  • the transport speed of the magnetic card and the level of the magnetic signal output from the magnetic head 50 are proportional to each other.
  • the transport speed of the magnetic card is increased, the change amount of the magnetic flux is increased, and the output level is increased.
  • the magnetic signal S3 shown in FIG. 11 can be obtained. That is, as shown in FIG. 10 (a), the level of the magnetic signal S3 is as shown in FIG.
  • FIG. 12 is a flow chart showing the operation of magnetic card reading in the second embodiment.
  • the magnetic card reader according to the second embodiment differs from the magnetic card reader 100 according to the first embodiment only in the operation of reading a magnetic card, and the hardware configuration is the same.
  • the same hardware elements are assigned the same reference numerals as in the first embodiment, and the description thereof is omitted.
  • the flowchart of FIG. 12 is different from the flowchart of FIG. 3 in the first embodiment in that the processes of steps S210 and S220 are added, and the processes of the other steps are the same. About the same step, the same number of steps as FIG. 3 is attached, and the explanation is omitted.
  • control unit 110 performs the forward path reading process in step S110, performs the backward path reading process in step S130, and when it is determined that the reading result is not normal in step S138, the writing of the magnetic card 200 is performed.
  • a process of measuring the level is performed (step S210).
  • the magnetic signal output from the magnetic head 40 is temporarily stored in the RAM, and in step S210, the write level is measured from the stored magnetic signal.
  • step S210 the control unit 110 determines whether the write level obtained in step S210 is less than a predetermined value (step S220).
  • the control unit 110 proceeds to the process of step S140 and executes the forward path reading process by high-speed conveyance.
  • step S220 determines whether the write level obtained in step S210 is less than the predetermined value.
  • the forward reading process by the high speed conveyance and the backward reading process by the high speed conveyance are executed.
  • the reading process by high speed conveyance is not performed.
  • the write level of the information on the magnetic card is high, even if some noise is mixed in the magnetic signal, reading of the information does not fail. Even so, the fact that the reading result is determined not to be normal in step S138 is likely to have failed reading due to reasons other than noise. For this reason, in the second embodiment, when it is determined that the write level is high, the reading process by high-speed conveyance with low effectiveness can be avoided, so that the execution time of the reading process is not unnecessarily extended.
  • FIG. 13 is a flowchart showing the magnetic card reading operation in the third embodiment.
  • the magnetic card reader according to the third embodiment differs from the magnetic card reader 100 according to the first embodiment only in the operation of reading a magnetic card, and the hardware configuration is the same.
  • the same hardware elements are assigned the same reference numerals as in the first embodiment, and the description thereof is omitted.
  • FIG. 13 Comparing the flow chart of FIG. 3 in the first embodiment with the flow chart of FIG. 13, while FIG. 3 includes the processing of steps S130 to S148, FIG. 13 does not have the processing of steps S130 to S148. So, both are different.
  • the processing of each step included in FIG. 13 is the same as the processing of the same number of steps in FIG.
  • the forward path reading process, the backward path reading process, the forward path reading process (high-speed transport), and the backward path read process (high-speed transport) can be sequentially performed.
  • the third embodiment has the following configuration. That is, as shown in FIG. 13, first, the control unit 110 performs the forward path reading process (step S110), and performs the backward path reading process (high-speed transport) when the reading result is not normal (step S128: NO) Step S150). Therefore, according to the magnetic card reader of the third embodiment, by performing the reading process by the high speed conveyance in the first return path, it is possible to prevent the reading failure of the information due to the noise.
  • step S210 and step S220 of FIG. 12 are added before the reading processing by high speed conveyance, that is, between step S128 and step S150. It can also be done.
  • FIG. 14 is a flow chart showing the operation of reading a magnetic card in the fourth embodiment.
  • the magnetic card reader according to the fourth embodiment differs from the magnetic card reader according to the second embodiment only in the operation of reading a magnetic card, and the hardware configuration is the same. That is, the magnetic card reader 100 according to the first embodiment is the same.
  • the same hardware elements are assigned the same reference numerals as in the first embodiment, and the description thereof is omitted.
  • the magnetic stripe of the magnetic card 200 has three tracks, and the recording density of the magnetic data differs depending on the tracks.
  • the first and third tracks have a recording density of 210 bpi (bit / inch), and the second track has a recording density of 75 bpi (bit / inch).
  • the flowchart of FIG. 14 is different from the flowchart of FIG. 12 in the second embodiment in the processes of steps S440 and S450, and the processes of other steps are the same. About the same step, the same step number as FIG. 12 is attached, and the explanation is omitted.
  • Step S440 executes the forward path reading process of FIG. 7 in the same manner as the process of step S140 (FIG. 3) described above. That is, in step S440, the forward path reading process by high-speed transport is performed. Furthermore, in step S440, noise removal is also performed. The noise removal is performed by the magnetic information reading process which is started / stopped in the forward path reading process.
  • FIG. 15 is a flow chart showing the magnetic information reading process in the fourth embodiment. This flowchart is different from the flowchart of FIG. 5 in the first embodiment in that the processes of steps S510 to S540 are added, and the processes for other steps are the same. About the same step, the same number of steps as FIG. 5 is attached, and the explanation is omitted.
  • step S510 when it is determined in step S125 that the check result is invalid, the control unit 110 performs a process of checking the jitter abnormality of the jitter data obtained in the middle of the process of step S123 (step S510). ).
  • the jitter data is obtained for each track of the magnetic stripe described above, and in step S510, the above-mentioned check is performed on each jitter data obtained from each track.
  • Jitter anomalies are defects that occur in the short term in jitter data that is a pulse waveform (see NX in FIG. 18).
  • the control unit 110 determines whether the jitter abnormality occurs at the same timing for all of the plurality of jitter data, performs character conversion from the jitter data by invalidating the jitter abnormality generated at the same timing ( Step S520).
  • control unit 110 After execution of step S520, control unit 110 performs the same data validity check as step S124 (step S530). When the check result is valid, control unit 110 advances the process to step S126. On the other hand, when the check result is invalid, control unit 110 advances the process to step S127.
  • step S450 is to execute the return path reading process of FIG. 8 in the same manner as the process of step S150 (FIG. 3) described above. That is, in step S450, the return path reading process by high speed conveyance is executed. Furthermore, in step S450, noise removal is also performed. This noise removal is performed by the magnetic information reading process of FIG. 15 described above.
  • FIG. 16 is an explanatory view showing magnetic signals obtained from each track provided in the magnetic stripe.
  • FIG. 16 (a) shows magnetic signals obtained from the first track and the third track
  • FIG. 16 (b) shows magnetic signals obtained from the second track. Since the first and third tracks and the second track have different recording densities, as shown, peaks of the magnetic waveform are output at different timings.
  • noise NZ is mixed into this magnetic signal, as shown in the figure, the noise NZ is mixed into each track at the same timing.
  • FIG. 17 is an explanatory view showing a magnetic signal and jitter data formed from the magnetic signal.
  • FIG. 17 (a) shows a magnetic signal
  • FIG. 17 (b) shows jitter data.
  • the jitter data is an F2F output signal (RDD) obtained by amplifying, differentiating and waveform shaping a magnetic signal acquired from the magnetic head. As illustrated, the jitter data has a pulse-like waveform according to the peak interval of the magnetic signal.
  • RDD F2F output signal
  • FIG. 18 is an explanatory view showing jitter data in the case where noise is mixed in the magnetic signal of each track together with the magnetic signal.
  • FIGS. 18 (a) and 18 (b) are the same as FIGS. 16 (a) and 16 (b).
  • FIG. 18 (c) shows jitter data formed from magnetic signals obtained from the first track and the third track
  • FIG. 18 (d) is formed from magnetic signals obtained from the second track. It shows jitter data.
  • noise NZ is mixed into the magnetic signal
  • a missing portion (jitter abnormality) NX of a waveform due to noise also occurs at the same timing in the jitter data corresponding to each track.
  • the high speed conveyance can further prevent the information reading failure due to the noise, and further, the noise can be eliminated by the noise removal. Failure to read information due to it can be further prevented.
  • noise removal is added to each of the second forward pass reading process and the second pass backward process in the second embodiment, but instead, noise is removed in the first embodiment. Noise removal may be added to each of the second forward reading process and the backward reading process.
  • FIG. 19 is a flowchart showing the magnetic card reading operation in the fifth embodiment.
  • the magnetic card reader according to the fifth embodiment differs from the magnetic card reader according to the fourth embodiment only in the operation of reading the magnetic card, and the hardware configuration is the same. That is, the magnetic card reader 100 according to the first embodiment is the same.
  • the same hardware elements are assigned the same reference numerals as in the first embodiment, and the description thereof is omitted.
  • FIG. 14 includes the processing of steps S130, S138, S210, S220, S220, S440, and S148, while FIG. The two are different in that S130, S138, S210, S220, S440, and S148 are not performed.
  • the processing of each step included in FIG. 19 is the same as the processing of the same number of steps in FIG.
  • the forward path reading process, the backward path reading process, the forward path reading process (high speed transport + noise removal), and the backward path reading process (high speed transport + noise removal) can be sequentially performed.
  • the fifth embodiment has the following configuration. That is, as shown in FIG. 19, first, the control unit 110 performs the forward path reading process (step S110), and when the reading result is not normal (step S128: NO), the backward path reading process (high speed conveyance + noise removal) (Step S450). Therefore, according to the magnetic card reader of the fifth embodiment, by performing the reading process by high speed conveyance and noise removal in the first return path, it is possible to prevent reading failure of information due to noise. it can.
  • step S210 and step S220 of FIG. 12 are added before the reading processing by high speed conveyance, that is, between step S128 and step S450. It can also be done.
  • FIG. 20 is a flowchart showing the magnetic card reading operation in the sixth embodiment.
  • the magnetic card reading operation in the sixth embodiment is different from the magnetic card reading operation in the fifth embodiment (FIG. 19) only in the processing contents of step S550, and the processing in the other steps is the same. It is. About the same step, the same step number as FIG. 19 is attached, and the explanation is omitted.
  • the control unit performs return path reading processing in step S550.
  • the reading process is performed in the return path while conveying the magnetic card at a normal speed (first speed), and noise removal is also performed on the path. This noise removal is performed by the magnetic information reading process of FIG. 15 as described above.
  • the noise removal can prevent the reading failure of the information due to the noise.
  • the noise removal is performed in the backward path reading process at the time of retry.
  • the noise removal may be performed in the forward path reading process of step S110.
  • only the forward path reading process may be performed without performing the backward path reading process, and noise removal may be performed in the forward path reading process.
  • the magnetic card reader of each of the above embodiments has the coil 24 at the insertion slot 20, and the disturbance magnetic field generated by the coil 24 can prevent the skimming device from exploiting the magnetic information.
  • it may be configured without the disturbing magnetic field generator such as the coil 24. Since the disturbing magnetic field generator can be a noise source, reading errors due to noise are likely to occur, but noise may be mixed in due to an external factor even in a magnetic card reader without the disturbing magnetic field generator. Therefore, the configuration in which the coil 24 is removed in each of the above-described embodiments can be used as an embodiment of the present invention.
  • the magnetic detection unit is configured of a magnetic head having a core and a coil, but the present invention is not limited to this.
  • a magnetoresistive element or the like may be provided.
  • the magnetic card is configured to include three tracks, but the present invention is not limited to this. For example, two, four and a plurality of other tracks may be provided.
  • Modification 4 In each of the above embodiments, the transport unit transports the magnetic card, but instead, the magnetic head may be moved without moving the magnetic card. The point is that the transport unit may be configured to transport the magnetic card relative to the magnetic head.
  • Modification 5 In the above fourth embodiment, fifth embodiment, and their modifications, it is configured to determine whether jitter abnormality occurs at the same timing in each jitter data formed from the magnetic signal for each track. So, it is not limited to this configuration.
  • the peak position may be detected directly from the magnetic signal for each track, and it may be determined whether the peak position occurs at the same timing for all the magnetic signals.
  • the second control unit is configured to read information when it is determined that the information read by the first control unit is not normal, but the present invention is not limited to this.
  • the first control unit and the second control unit may always be continuously performed, and the reading results may be compared with each other to increase the reading accuracy.
  • the secondary control unit may be additionally provided to the first control unit as needed.
  • Modification 7 In the above embodiments, a part of the functions realized by software may be realized by hardware (for example, integrated circuit), or a part of the functions realized by hardware may be realized by software. .

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  • Physics & Mathematics (AREA)
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  • Digital Magnetic Recording (AREA)

Abstract

La présente invention concerne un lecteur permettant d'empêcher des pannes de lecture d'information provoquées par le bruit. Le lecteur de carte magnétique selon la présente invention est équipé des éléments suivants : une unité de transport qui transporte une carte magnétique ; une unité de détection de carte magnétique qui détecte un signal de carte magnétique provenant de la carte magnétique transportée par l'unité de transport ; une première unité de commande qui lit une information par la réception du signal magnétique provenant de l'unité de détection magnétique lors du transport de la carte magnétique à une première vitesse par l'unité de transport ; et, en outre le cas échéant, une seconde unité de commande qui lit l'information par la réception du signal magnétique provenant de l'unité de détection magnétique lors du transport de la carte magnétique par l'unité de transport à une seconde vitesse qui est supérieure à la première vitesse.
PCT/JP2012/000872 2012-02-09 2012-02-09 Lecteur de carte magnétique et procédé de lecture de carte magnétique WO2013118183A1 (fr)

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PCT/JP2012/000872 WO2013118183A1 (fr) 2012-02-09 2012-02-09 Lecteur de carte magnétique et procédé de lecture de carte magnétique

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Cited By (1)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
EP3279828A4 (fr) * 2015-03-30 2018-11-07 Nidec Sankyo Corporation Lecteur de carte

Citations (6)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
JPH0268688A (ja) * 1988-09-02 1990-03-08 Sanyo Electric Works Ltd カード式乗車券精算装置
JPH06215473A (ja) * 1993-01-13 1994-08-05 Hitachi Ltd 通帳磁気ストライプ読み書き機構
JP2002074607A (ja) * 2000-08-30 2002-03-15 Sankyo Seiki Mfg Co Ltd カードリーダ
JP2004259322A (ja) * 2003-02-24 2004-09-16 Omron Corp 磁気情報書き込み装置および磁気情報書き込み方法
JP2006332953A (ja) * 2005-05-25 2006-12-07 Konica Minolta Photo Imaging Inc カード画像読み取り装置、及びその制御方法
JP2011138584A (ja) * 2009-12-28 2011-07-14 Nec Computertechno Ltd 磁気読み取り装置、磁気読み取り方法およびプログラム

Patent Citations (6)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
JPH0268688A (ja) * 1988-09-02 1990-03-08 Sanyo Electric Works Ltd カード式乗車券精算装置
JPH06215473A (ja) * 1993-01-13 1994-08-05 Hitachi Ltd 通帳磁気ストライプ読み書き機構
JP2002074607A (ja) * 2000-08-30 2002-03-15 Sankyo Seiki Mfg Co Ltd カードリーダ
JP2004259322A (ja) * 2003-02-24 2004-09-16 Omron Corp 磁気情報書き込み装置および磁気情報書き込み方法
JP2006332953A (ja) * 2005-05-25 2006-12-07 Konica Minolta Photo Imaging Inc カード画像読み取り装置、及びその制御方法
JP2011138584A (ja) * 2009-12-28 2011-07-14 Nec Computertechno Ltd 磁気読み取り装置、磁気読み取り方法およびプログラム

Cited By (1)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
EP3279828A4 (fr) * 2015-03-30 2018-11-07 Nidec Sankyo Corporation Lecteur de carte

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