JP2006260674A - Magnetic recording data reader - Google Patents

Abstract

<P>PROBLEM TO BE SOLVED: To prevent erroneous reading of data due to disorder of conveyance speed of a magnetic recording medium as much as possible. <P>SOLUTION: Magnetic data pulses 1, 0 are determined by setting 1, 0 determination time width T3', T5', T7', T9', ... of the corresponding magnetic recording bits based on encoder pulses T3, T5, T7, T9, ... within a change period of bits of the magnetic data pulses among one bit intervals T1, T2, T3, T4, T5, T6, T7, T8, ... of encoder pulses. <P>COPYRIGHT: (C)2006,JPO&NCIPI

Description

  The present invention relates to a magnetic recording data reader for reading data magnetically recorded on a magnetic recording medium to be conveyed.

  Conventionally, in the case of reproducing data using a data reproduction signal reproduced by detecting data on a magnetic card, the logic level immediately after the change point of the data reproduction signal is stored, and then 1-bit data by software After waiting for a time shorter than the time interval, the logic level of the data reproduction signal is read and compared with the previously stored logic level. If the logic level is the same, the data is determined to be “0”. If it is different, it is known that the data is determined as “1” (for example, see Patent Document 1).

Further, for example, an encoder that rotates and generates a pulse according to the state of conveyance of the magnetic recording medium is provided, and as shown in FIG. 6, the magnetic field is generated based on the 1, 0 change point of the encoder pulse immediately before the encoder. Set the 1, 0 judgment time width of the recording bit, that is, T1, T3, T5, T7,... Of the encoder pulse 1 bit interval T1, T2, T3, T4, T5, T6, T7, T8,. .., T1 ′, T3 ′, T5 ′, T7 ′,... Can be set based on the above, thereby determining the 1 and 0 of the magnetic data bits.
In any case, it is the same to determine 1 and 0 of the next bit with reference to the interval of 1 bit read immediately before.
JP 62-43871 A

By the way, if a passbook with a magnetic stripe formed on the cover instead of a magnetic card is used as the magnetic recording medium to be transported, the transport speed may be disturbed due to the medium hitting a part of the transport path during transport. It occurs relatively frequently. However, when the transport speed is disturbed and the bit width of the data becomes long, the next bit of 1, 0 is determined with reference to the 1-bit interval T3 read immediately before. ′ Becomes shorter than the bit width of the data, so that the data that should originally be determined to be “1” continues to be high level within the determination time width T3 ′, and is determined to be “0”. The problem of misreading data arises.
Therefore, the present invention provides a magnetic recording reading apparatus capable of preventing data misreading as much as possible due to disturbance in the conveyance speed of the magnetic recording medium.

  The present invention includes, for example, a conveying unit that conveys a magnetic recording medium such as a passbook in which a magnetic stripe in which data is magnetically recorded is formed, a reading unit that reads magnetic recording data from the magnetic recording medium conveyed by the conveying unit, The reading means rotates according to the state of conveyance of the magnetic recording medium when reading the magnetic recording data, generates a pulse, the 1, 0 change point of each bit of the magnetic recording data read by the reading means, and the encoder A memory for storing the 1, 0 change point of the pulse, and a 1, 0 determination time for the corresponding bit of the magnetic recording data based on the pulse width of the encoder pulse within the change time of the bit of the magnetic recording data stored in the memory Magnetic means comprising setting means for setting the width, and determination means for determining 1, 0 of the bit based on the determination time width set by the setting means In the recorded data reading device.

  ADVANTAGE OF THE INVENTION According to this invention, the magnetic recording data reader which can prevent the misreading of the data by disturbance of the conveyance speed of a magnetic recording medium as much as possible can be provided.

  Hereinafter, an embodiment of the present invention will be described with reference to the drawings. In this embodiment, the present invention is applied to a passbook processing apparatus that uses a passbook with a magnetic stripe formed on a cover as a magnetic recording medium and reads and prints data on the passbook. .

  FIG. 1 is a diagram showing a configuration of a main part of a bankbook processing apparatus, in which an insertion port 3 for a bankbook 2 that is a magnetic recording medium is provided at one end of a rectangular housing 1 and is opened from the insertion port 3. The passbook 2 is inserted so that the magnetic stripe provided on the cover is directed downward, and is reciprocally conveyed by a conveyance path 4 using a roller or the like.

  A magnetic head 5 that reads recording data from the magnetic stripe of the bankbook 2 is disposed in the middle of the conveyance path 4 and is located at the lowermost position when viewed from the insertion port 3. Further, an optical reading device 6 that optically reads data printed on the passbook is disposed in the middle of the conveyance path 4 behind the magnetic head 5. A printing device in which the print head 7 and the platen 8 are arranged to face each other is disposed in the middle of the conveyance path 4 behind the optical reading device 6. Further, a page turning mechanism 9 is provided behind the printing apparatus to turn the spread page to the next page when printing of one page on the bankbook 2 is completed.

  As shown in FIG. 2, a follower roller 10 that rotates following the conveyance of the bankbook 2 is provided at the portion where the magnetic head 5 is disposed. The rotation of the roller 10 is transmitted to the encoder 12 via the transmission mechanism 11. Communicating. The encoder 12 generates an encoder pulse as shown in FIG. 4 by rotation.

  FIG. 3 is a block diagram showing the configuration of the control unit. The CPU (central processing unit) and the CPU of the control unit main body 15 having I / O store a ROM (Read / Read) for storing program data for the CPU to control each unit. An only memory (RAM) 16 and a RAM (Random Access Memory) 17 in which various memories for storing data are formed are connected via a bus line 18.

  Further, a magnetic reading / writing circuit 19, a detecting unit 20, a reading driving unit 21, a motor driving unit 22, a printing driving unit 23, and a turning driving unit 24 are connected to the I / O of the control unit main body 15, respectively. . The magnetic read / write circuit 19 is connected to the magnetic head 5 and controls data writing and data reading by the magnetic head 5. The detection unit 20 is connected to the encoder 12 and detects an encoder pulse. The reading drive unit 21 drives the optical reading device 6 to read print data. The motor drive unit 22 drives a motor of a transport mechanism 25 composed of a transport roller or the like that forms the transport path, and reciprocates the passbook.

  The print drive unit 23 drives a printing device 26 having a print head 7 and a platen 8 to print data on the bankbook 2. The page turning drive unit 24 is connected to the page turning mechanism 9 and drives the page turning mechanism 9 to perform page turning of the bankbook 2.

  In such a configuration, when the passbook 2 is opened and inserted into the insertion slot 3, the CPU of the control unit main body 15 controls the motor drive unit 22 to drive the motor of the transport mechanism 25. Thereby, the bankbook 2 is inserted along the conveyance path 4. Then, the data recorded on the magnetic stripe formed on the surface of the bankbook 2 is read by the magnetic head 5 and transmitted as a magnetic data pulse to the CPU of the control unit body 15 via the magnetic reading / writing circuit 19. . When the CPU fetches the magnetic data pulse, it stores it in the memory in the RAM 17. Then, the change point of 1, 0 of the magnetic recording bit of the magnetic data pulse is detected and stored in another memory in the RAM 17.

  Further, the conveyance state of the bankbook 2 at this time is detected by the follower roller 10, and an encoder pulse corresponding to the conveyance speed of the bankbook 2 is generated from the encoder 12. This encoder pulse is transmitted to the CPU via the detection unit 20. When the CPU captures the encoder pulse, it stores it in the memory in the RAM 17. Then, a change point of 1, 0 of the encoder pulse is detected and stored in another memory in the RAM 17.

  The CPU sets the 1, 0 determination time width of the corresponding magnetic recording bit based on the 1, 0 change point of the encoder pulse stored in the memory. That is, as shown in FIG. 4, encoder pulses T3, T1, T2, T3, T4, T5, T6, T7, T8,. Based on T5, T7, T9,..., 1 and 0 determination time widths T3 ', T5', T7 ', T9',. Determination means).

  Accordingly, it is determined that the magnetic data pulse has changed from the high level to the low level in the 1, 0 determination time width T3 ′, and is determined to be “1”. Further, in the 1, 0 determination time width T5 ′, even if the bankbook 2 comes into contact with a part of the delivery path 4 and the conveyance speed is slowed down and the bit width of the data becomes long, the bit of this data is determined. Since the time width T5 ′ to be increased is also increased, it is determined that the magnetic data pulse has changed from the high level to the low level and is determined to be “1”.

Further, in the 1, 0 determination time width T7 ', it is determined that the magnetic data pulse has changed from the high level to the low level, and is determined to be "1". Further, in the 1, 0 determination time width T9', the magnetic data pulse is determined. It is determined that the pulse continues to be in the high level state and is determined to be “0”.
Thus, even if the conveyance speed of the bankbook 2 is disturbed, the encoder pulse whose pulse width changes according to the disturbance is used to determine 1, 0 of the magnetic data pulse. Misreading can be prevented as much as possible.

  When 1 or 0 of each bit of the magnetic data read from the magnetic stripe of the bankbook 2 is determined in this way, the determined result is stored in the memory in the RAM 17. The parity check of the read magnetic data is performed. If it is determined that the parity check is correct, the demodulation is terminated with the magnetic data as the final read data.

  On the other hand, if the result of the parity check is that it cannot be read correctly, the bankbook 2 is conveyed in the reverse direction so as to return to the insertion slot 3 side with respect to the forward reading shown in FIG. As shown in (b), reading in the reverse direction is performed, the same magnetic data pulse 1 or 0 is determined, and the result is stored in the memory in the RAM 17. The parity check of the read magnetic data is performed. If it is determined that the parity check is correct, the demodulation is terminated with the magnetic data as the final read data.

  However, if the data is not correctly read as a result of the parity check even when reading in the reverse direction, the data read in the forward direction is compared with the data read in the reverse direction, and the bits that are different from each other (bits indicated by underlines) To detect. Then, one of the different bits is changed by software processing, as shown in FIG. That is, “1” of different bits in the forward reading is set to “0”. Then, a parity check of the magnetic data is performed. If it is determined that the parity check is correct, the demodulation is terminated with the magnetic data as the final read data.

  Further, if the result of the parity check is that the data cannot be read correctly, another one of the different bits is changed as shown in FIG. That is, “0” of different bits in the forward reading is set to “1”. Then, a parity check of the magnetic data is performed. If it is determined that the parity check is correct, the demodulation is terminated with the magnetic data as the final read data.

  As described above, when the magnetic data recorded in the magnetic stripe of the bankbook 2 is first read forward by conveying the bankbook 2 in the forward direction, and as a result of parity check, the data is not correctly read. In this case, if the data is not correctly read as a result of the parity check, the forward reading and the backward reading data are compared to detect different bits and Since the parity check is performed by exchanging the bits with software, it is possible to find the correct magnetic data without further transporting the bankbook 2. As a result, it is possible to increase the processing speed when it is determined as a result of the parity check that the data cannot be correctly read.

The figure which shows the principal part structure of the bankbook processing apparatus using the magnetic reader which concerns on one embodiment of this invention. The figure which shows the relationship between the magnetic head and encoder in the embodiment. The block diagram which shows the structure of the control part in the embodiment. The figure which shows the timing relationship of the encoder pulse in the same embodiment, a 1 and 0 determination time width, and a magnetic data pulse. The figure for demonstrating the data processing at the time of the parity check of the read data in the embodiment. The figure which shows the timing relationship of the conventional encoder pulse, 1 and 0 determination time width, and a magnetic data pulse.

Explanation of symbols

  2 ... Passbook (magnetic recording medium), 5 ... Magnetic head, 10 ... Tracking roller, 12 ... Encoder, 15 ... Control unit body.

Claims (1)

  Conveying means for conveying the magnetic recording medium on which the magnetic recording data is recorded, reading means for reading the magnetic recording data from the magnetic recording medium conveyed by the conveying means, and the magnetic when the reading means reads the magnetic recording data An encoder that rotates and generates a pulse according to the conveyance state of the recording medium, and the 1, 0 change point of each bit of the magnetic recording data read by the reading means and the 1, 0 change point of the pulse from the encoder are stored. Memory, setting means for setting the 1, 0 determination time width of the corresponding magnetic recording data bit based on the pulse width of the encoder pulse within the change time of the bit of the magnetic recording data stored in the memory, and this setting A magnetic recording data reading device comprising: determination means for determining 1 or 0 of a bit based on a determination time width set by the means .

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