JPS619871A - Reader of magnetic stripe data - Google Patents

Abstract

PURPOSE:To cope with data error by detecting the start part of magnetic stripe data on a basis of conents of data stored in a magnetic stripe. CONSTITUTION:All data in the magnetic stripe read by a magnetic head 1 are stored in a memory 4. A reading circuit 6 reads out data in order; and when a start code detecting circuit 7 detects a start of text signal (STX signal), the address of the STX signal is outputted as the read start address to an address designating circuit 5, and the reading circuit 6 transmits following data to a control part through a buffer 9. If data read into the control part have an error, data is read out character by character until the next STX signal is detected because there is a probability that next stored magnetic stripe data is perfect.

Description

DETAILED DESCRIPTION OF THE INVENTION (a) Technical Field The present invention relates to a magnetic stripe data reading device for a bank transaction processing device, and more particularly to a magnetic stripe reading device in which magnetic stripe data is stored a plurality of times.

(bl Prior Art and Its Disadvantages) Teller's machines and automatic transaction processing devices (hereinafter referred to as ATMs) used in banks etc. can start processing by taking mh data from the magnetic stripe of a cash cart or bankbook. However, Since these magnetic stripes have low data retention reliability, a method has been proposed in which the necessary data is stored by repeating it multiple times, and this method has already been put into practical use in bankbooks. In order to do this, the length of the magnetic stripe is divided, and necessary data (hereinafter referred to as magnetic stripe data) is stored in each divided block.

In order to read magnetic stripes such as those mentioned above, Tsuchiki detected the length of the magnetic stripe from the beginning by measuring the elapsed time from the start of scanning, and determined the beginning of each block. However, this method has the disadvantage that it cannot be used in hand scanners and the like where the scanning speed is not constant. In addition, a method has been proposed that measures the feed amount and determines the beginning of the block, but such a physical method requires changing the magnetic stripe division method or when a block is broken due to a data error. (C1 Purpose of the Invention In order to solve the above drawback, this invention detects the beginning of the magnetic stripe data from the contents of the data stored on the magnetic stripe, and detects errors in the data. It is an object of the present invention to provide a magnetic stripe data reading device that can be used in various cases.

(d) Structure of the Invention The present invention includes a storage means for storing all the read data for each bin 1~, a means for detecting the start code of magnetic stripe data from the data, and a means for detecting the start code or error. and means for specifying an address according to the address of the occurrence location.

(e) Embodiment FIG. 1 is a block diagram of a magnetic stripe data reading device which is an embodiment of the present invention. The data on the magnetic stripe read by the magnetic head 1 is amplified by an amplifier 2 and then discriminated into data and a clock signal by an F2F circuit 3. This data is stored in memory 4. The memory 4 includes a readout circuit 6. A counter 8 is connected.

Counter 8 counts and stores the total number of bits of data read into memory 4. The successive circuit 6 includes an addressing circuit 5. Start code detection circuit 7. A buffer 9 is connected, and the reading circuit 6 assembles the data read from the memory 4 into characters (5 bits 1 to 5 in this embodiment) and then outputs them to the start code detection circuit 7 or the buffer 9. 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 out the address and outputs it to the address designation circuit 5.

The address designating circuit 5 designates the address of the memory 4 that the read circuit 6 cannot read. This address designation circuit 5 initially designates the first address of the memory 4, and when an error (described later) occurs, it sequentially designates each character from the succeeding address at that pixel. s
When the address of the 'rx signal is input, the addressing circuit 5 outputs the address to the subsequent circuit 6 as a read start address. The buffer 9 outputs the data input from the output circuit 6 to a control section (not shown).

The second panel is a diagram showing the main part of the memory of the above embodiment. Area M1 has 4 bits of 0'' written in it, which is read as a preamble. Area M2 has 5 bits of ``1'', which is the STX signal. Area M
3 stores the data contents of magnetic stripe data. ETX signals are stored in area M4. In this embodiment, the 5-bit “l” signal is the same as the STX signal.
It is. Area M5 is a 4-bit “′” spacer.
It is 0゛. Area M6 is the STX signal of the second block. Area M7 stores the second block of magnetic stripe data. Thereafter, the ETX signal and postamble are sequentially stored. The data with the above configuration is 5-bit 1-character data. Therefore, the readout circuit 6 of this embodiment. The configuration of the buffer 9 and the like is also configured for 5 bits and 1 character.

FIG. 3 is a flowchart showing the flow of processing in the above embodiment. In step nl (hereinafter step ni will be simply referred to as ni), the start of scanning of a medium such as a cash card or a bankbook is detected, and when detected, the process advances to n2. At n2, all data of the magnetic stripe is stored in the memory 4. n
In step 3, the reading circuit 6 sequentially reads out the data stored in the memory 4 from the beginning and outputs it to the start code detection circuit 7 (n3). When the start code detection circuit 7 detects the STX signal (n4), it outputs address 1 of the STX signal to the address designation circuit 5 as the read start address (n5).
The reading circuit 6 transmits the subsequent data to the control section via the sofa 9 (n6).

At n7, it is determined whether there is an error in the data read into the control section, and if there is an error, the process moves to 09; otherwise, the process moves to n8. At n8, it is determined whether the read data is an end-of-text signal (hereinafter referred to as an ETX signal), and if it is not an ETX signal, the process returns to n6 and the data transmission is repeated, and when the ETX signal is read, the process is started. Finish.

At n7, when it is determined that an error has occurred in the read data and the process moves to n9, the remaining number of hits is calculated by subtracting the number of bits read before finding the STX signal from the total number of bits counted by the counter 8. The history of one block of magnetic stripe data that has been predetermined as follows.
If the predetermined number of bits for one block of magnetic stripe data is larger,
Since the data read from the magnetic stripe is incomplete, the process is finished by outputting a message to that effect (n1
2). If the number of remaining bits is larger in n9, the next stored magnetic stripe data may be complete, so one character from the previous STX signal detection start address is required until the next STX signal is detected. The start code detection circuit 7 continues reading data every time (nlo>, ST
If the X signal is detected, the process returns to 05.n 11)
If not detected, the process returns to n9. If the number of remaining bits is not detected, or the number of remaining bits is less than the predetermined number of magnetic stripe data, 09
If it is determined, the process will stop after performing the process of n12. This n
5. nlo corresponds to the detection start address setting means of the present invention.

([1) Effects of the Invention According to the present invention, no matter how many blocks the magnetic stripe data is repeated on one magnetic stripe, the magnetic stripe data can be extracted from the contents of the data stored on the magnetic stripe. ~In addition to being able to detect the beginning of live data, even if there is an error in the read data and the block allocation is corrupted, it has the advantage of being able to quickly detect the beginning of the next magnetic stripe data and handle the error. Live.

[Brief explanation of the drawing]

Fig. 1 is a block diagram of a magnetic stripe data reading device which is an embodiment of the present invention, Fig. 2 is a block diagram of the main part of the memory of the embodiment described above, and Fig. 3 shows the processing flow of the above embodiment. It is a flowchart. 1-Magnetic Henode, 4-Memory, 5-Addressing Circuit, 6-Reading Circuit, 7-Starting Code Detection Circuit, 8-Counter, 9-Hassofa.

Claims (1)

[Claims] (1) A storage means for storing, bit by bit, all data read 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 multiple times; a means for detecting a start code of magnetic stripe data from among all the data; a data reading means for reading and outputting data at addresses subsequent to the start code when the start code is detected; and a detection start address for detecting the start code. detection start address setting means for initially setting the first address to the first address, and setting the detection start address to an address to which a certain value is added when an error occurs while reading data by the data reading means; Data reader.