JPH071603B2 - Magnetic stripe data reader - Google Patents

Description

Description: (a) Technical Field The present invention relates to a magnetic stripe data reading device for a bank takeover processing device, and more particularly to a magnetic stripe reading device in which magnetic stripe data is stored a plurality of times.

(B) Conventional Technology and Its Defects A tellers machine or an automatic transaction processing apparatus (hereinafter referred to as ATM) used in a bank or the like can start the processing by reading the magnetic stripe data of a cash card or a passbook. However, since these magnetic stripes have low reliability of data retention, a method of repeatedly storing necessary data a plurality of times has been proposed, which has already been put to practical use in a bankbook. In order to repeatedly store data as described above, divide the length of the magnetic stripe,
Required data (hereinafter referred to as magnetic stripe data) is stored for each divided block.

In order to read the magnetic stripe as described above, conventionally, the length from the starting end of the magnetic stripe is detected by measuring the elapsed time from the start of the scanning, and the head portion of each block is determined. However, this method has a drawback that it cannot be used for a hand scanner or the like in which the scanning speed is not constant. A method has also been proposed in which the feed amount is measured to determine the beginning of the block, but with such a physical method, when the block division is broken due to a change in the magnetic stripe division method or a data error. There was a drawback that I could not deal with.

(C) Object of the Invention In order to solve the above-mentioned drawbacks, the present invention can detect the head portion of the magnetic stripe data from the contents of the data stored in the magnetic stripe and can respond even if there is an error in the data. An object is to provide a data reading device.

(D) Configuration of the Invention According to the present invention, in a reading device for reading magnetic stripe data of a medium having a magnetic stripe in which the same magnetic stripe data is repeatedly stored a plurality of times, all read data is stored bit by bit. Storing means, means for detecting the start code of the magnetic stripe data from all the data stored in the storage means, and data of addresses after the start code is detected by the means for detecting the start code. The data reading means for reading and outputting and the detection start address for detecting the start code by the means for detecting the start code are initially set to the head address, and an error occurs during the data reading by the data reading means. When the above occurs, the detection start address setting is set to the address obtained by adding a certain value to the address of the start code detected previously. Means, a remaining bit number calculating means for obtaining the number of remaining bits which have not yet been read by the data reading means from the detection start address set by the detection start address setting means, and the remaining bit number. When the number of bits of the same magnetic stripe data is greater than or equal to the number of bits of the same magnetic stripe data, data read control means that enables the data reading means, and data reading when the number of remaining bits is less than the number of bits of the same magnetic stripe data Data read error processing means for processing an error.

(E) Embodiment FIG. 1 is a block diagram of a magnetic stripe data reader according to an embodiment of the present invention. The data of the magnetic stripe read by the magnetic head 1 is amplified by the amplifier 2 and then discriminated into the data and the clock signal by the F2F circuit 3. This data is stored in the memory 4. A reading circuit 6 and a counter 8 are connected to the memory 4. The counter 8 counts and stores the total number of bits of the data read in the memory 4. The read circuit 6 has an addressing circuit.
5, a start code detection circuit 7 and a buffer 9 are connected, and the read circuit 6 assembles the data read from the memory 4 into a character (5 bits in this embodiment), and then the start code detection circuit 7 or the buffer 9 Output. When the start code detection circuit 7 detects a start-of-text signal (hereinafter referred to as an STX signal) of data, which will be described later, the start code detection circuit 7 reads the address and outputs it to the addressing circuit 5. The address designating circuit 5 designates the address of the memory 4 read by the reading circuit 6. The address designating circuit 5 initially designates the leading address of the memory 4, and when an error described later occurs, it sequentially designates the read address at that time for each character, but the start code detecting circuit 7 sends the STX signal. Address is input, the address designating circuit 5 outputs the address to the reading circuit 6 as a reading start address. The buffer 9 outputs the data input from the read circuit 6 to a control unit (not shown).

FIG. 2 is a block diagram of the essential parts of the memory of the above embodiment. The area "M1" stores a bit "0", which is read as a preamble. Area M2 is 5-bit "1"
And this is the STX signal. The data content of the magnetic stripe data is stored in the area M3. An ETX signal is stored in area M4. In the case of this embodiment, it is a 5-bit "1" similar to the STX signal. Area M5 is a 4-bit “0” that is a spacer. Area M6 is the STX signal of the second block. Area M7 stores the magnetic stripe data of the second block. Below, the ETX signal and postamble are stored in sequence. The data having the above-described structure is 5-bit 1-character data. Therefore, the read circuit 6, the buffer 9 and the like of this embodiment are also constructed for 5 bits and 1 character.

FIG. 3 is a flowchart showing the flow of processing of the above embodiment. Step n1 (hereinafter step ni is simply called ni)
Then, if the scanning start of the medium of the cash card or the bankbook is detected, the process proceeds to n2. At n2, all data of the magnetic stripe is stored in the memory 4. At n3, the reading circuit 6 sequentially reads the data stored in the memory 4 from the beginning and outputs it to the start code detecting circuit 7 (n3). When the start code detection circuit 7 detects the STX signal (n4), the address designation circuit 5 uses the address of the STX signal as the read start address.
(N5), and the read circuit 6 transmits the subsequent data to the control unit via the buffer 9 (n6). At n7, it is judged whether or not there is an error in the data read into the control unit. If there is an error, the process proceeds to n9, and if not, the process proceeds to n8. In n8, the read data is the end of text signal (below
It is called an ETX signal), and if it is not an ETX signal, the process is returned to n6, data transmission is repeated, and the process ends when the ETX signal is read. When n7 determines that an error has occurred in the read data and the process proceeds to n9, the remaining number of bits excluding the number of bits read until the STX signal is found from the total number of bits counted by counter 8. And the predetermined number of bits of magnetic stripe data for one block are compared. If the predetermined number of bits of magnetic stripe data for one block is larger, the data read from the magnetic stripe is Since it is incomplete, processing such as output to that effect is performed and the processing ends (n12). If the number of remaining bits is larger in n9, the magnetic stripe data stored next may be complete, so data will be written for each character from the immediately preceding STX signal detection start address until the next STX signal is detected. Is continuously read (n10), if the start code detection circuit 7 detects the STX signal, the process is returned to n5 (n11), and if not detected, the process is returned to n9. If it is determined in n9 that the number of remaining bits becomes less than the predetermined number of bits of the magnetic stripe data without being detected, the process is stopped after performing the process of n12. The n3, n5, and n10 correspond to the detection start address setting means of the present invention, n9 corresponds to the remaining bit number calculating means, n11 corresponds to the data read control means, and n12 corresponds to the data read error processing means.

(F) Effects of the Invention As described above, according to the present invention, the magnetic stripe data can be calculated from the content of the data stored in the magnetic stripe regardless of the block division of the magnetic stripe data repeated in one magnetic stripe. It is possible to detect the head portion of the next magnetic stripe data and quickly perform error processing even if the read data has an error and the block allocation is broken.

[Brief description of drawings]

FIG. 1 is a block diagram of a magnetic stripe data reading apparatus according to an embodiment of the present invention, FIG. 2 is a block diagram of a main portion of a memory of the above embodiment, and FIG. 3 is a flow chart showing a processing flow of the above embodiment. is there. 1 ... Magnetic head, 4 ... Memory, 5 ... Addressing circuit, 6 ... Read circuit, 7 ... Start code detection circuit, 8 ... Counter, 9 ... Buffer.

Claims (1)

[Claims] 1. A reading device for reading magnetic stripe data of a medium having a magnetic stripe in which the same magnetic stripe data is repeatedly stored a plurality of times, and storage means for storing all read data bit by bit. Means for detecting the start code of the magnetic stripe data from all the data stored in the storage means, and data for reading and outputting the data of the address after the start code is detected by the means for detecting the start code The detection start address for detecting the start code by the reading means and the means for detecting the start code is initially set to the head address, and when an error occurs during the data reading by the data reading means, it is detected last time. Detection start address setting means for setting an address obtained by adding a constant value to the start code address Remaining bit number calculating means for obtaining the remaining number of bits of the entire data which has not been read by the data reading means from the detection start address set by the start address setting means, and the remaining bit number is the same magnetic field. Data read control means for enabling the data read means when the number of bits of the stripe data is equal to or more, and data read error processing when the number of remaining bits is less than the number of bits of the same magnetic stripe data. A device for reading magnetic stripe data, comprising: data read error processing means.