JPH01192002A - Magnetic recording system - Google Patents

Abstract

PURPOSE:To always perform the recording of data with the same format in spite of a travel direction by discriminating the travel direction of a card by an encoder, and switching the shift direction of the data in a shift register in a forward/backward direction based on a discriminated result. CONSTITUTION:The forward/backward direction of the shift direction of the card 6 is discriminated by the encoder 1. And write data 33 are outputted sequentially to a magnetic recording means 5 based on the discriminated result. The shift direction of the data in the shift register 3 is switched so as to obtain the same format of recorded data in spite of the travel direction of a magnetic card 6. Therefore, since the shift direction of the data in the shift register 3 is changed by a travel direction signal from the encoder 1, it is possible to reverse the delivery order of the bit of the write data 33 easily, and to always obtain data recording with the same format, which improves the degree of freedom of a system.

Description

[Detailed Description of the Invention] [Summary] The present invention relates to a magnetic recording method for a magnetic card, and aims to provide a magnetic recording method that can obtain recorded data in the same data format regardless of the moving direction of the magnetic card. The format of the recorded data is the same regardless of the direction of movement of the magnetic card by determining the data shift direction of a shift register that determines whether the direction of movement of the magnetic card is forward or reverse and sequentially outputs the recorded data to the magnetic recording means. The configuration is such that switching between forward and reverse is performed based on the above-mentioned determination result.

[Industrial application field]

The present invention relates to a magnetic recording method for magnetic cards.

Prepaid card systems using magnetic cards are rapidly becoming popular in recent years due to the convenience of allowing users to pay bills without carrying cash. When used to pay fares on public transportation, etc., it is desirable that the waiting time at the time of payment be short and that there are no restrictions on the direction in which the magnetic card can be inserted, and the emergence of such a magnetic recording system is desired.

[Conventional technology]

FIG. 2 is a block diagram showing a conventional magnetic card recording system.

When a magnetic card read/write device records and reproduces data on a magnetic card, the magnetic card inserted from the card insertion slot is conveyed over the magnetic head in one direction (the forward direction), and the balance data is read. The new data that has been read and subjected to predetermined processing such as reducing the required payment amount is re-recorded by the same magnetic head, and the recorded new data is read again and compared with the new data in the processing device to confirm the data. It consists of three processes: verifying whether the record is correct or not.

At this time, as shown in FIG. 2, new data is written by temporarily storing write data 41 serially transferred from the control device 4 in a predetermined order in the shift register 3', and adjusting the conveyance speed of the magnetic card 6. After inputting the clock pulses 21 proportionally sent from the encoder 1' into the modulator 51 in a predetermined order and performing a predetermined modulation such as F-2F modulation, the clock pulses 21 are sent via the write driver circuit 52. By recording from the magnetic head 53, data is written in a predetermined format onto a magnetic card 6 that moves in a fixed direction.

[Problem that the invention seeks to solve]

In the conventional magnetic card recording method described above, the transfer order of recorded data is fixed, so it is necessary to always move the magnetic card in the same direction in order to record data in a predetermined data format.

If the direction of movement of the magnetic card during writing is not limited and the format of the recorded data is the same regardless of whether it is forward or backward, the feeding direction can be determined optimally depending on the situation, reducing processing time. The convenience of the read/write device is improved by providing card slots on the front and back sides.

For example, a magnetic card reader/
Once the writer is installed, magnetic cards can be inserted from either side.

However, in magnetic card read/write devices that use conventional magnetic recording methods, when recording data on a magnetic card inserted through the insertion slot provided on the back side, the magnetic card is first transported to the writing start position, and then the There is a problem in that data must be written while moving the card in the same direction, and the card processing time increases by the amount of time required for transporting the card.

The present invention was created in view of the above problems, and an object of the present invention is to provide a magnetic recording method that allows recording data of the same data format to be obtained regardless of the moving direction of the magnetic card.

[Means for solving problems]

The above problem is solved by the present invention, which uses an encoder to determine whether the direction of movement of the magnetic card is forward or reverse, and based on the determination result, determines the data shift direction of the shift register that sequentially outputs recorded data to the magnetic recording means. This problem is solved by the magnetic recording method of the present invention, which is characterized by switching between forward and reverse so that the format of the recorded data is the same regardless of the direction of movement.

[For production]

Since the shift direction of data on the shift register changes in response to changes in the card movement direction signal from the encoder, it is possible to easily reverse the bit sending order of write data, making it possible to always record data in the same format. can.

〔Example〕

Embodiments of the present invention will be described in detail below with reference to the drawings.

FIG. 1 is a block diagram showing a magnetic recording system according to the present invention.

In the figure, l is a two-phase encoder, which includes a slit disk 11 that rotates in accordance with the rotation of a magnetic card conveying means such as a feed roller, and two photos that detect the passage of the slit of the slit disk 11 with light. The two photocouplers 12, 13 are connected to the slit so that the sign of the phase difference of their output signals is opposite depending on the direction of rotation of the slit disk 11 (therefore, the direction of movement of the magnetic card). They are arranged with a phase shift of 90 degrees with respect to the two.

Reference numeral 2 denotes an encoder output circuit which processes the two-phase output signal from the encoder 1 to generate a clock pulse 21 for writing and a card movement direction signal 22.

Reference numeral 3 denotes a reversible shift register whose data shift direction is reversed according to the card movement direction signal 22, which temporarily stores write data from the processing device 4 and clock pulse 2.
1, the data is internally shifted in a predetermined direction and serially sent to the magnetic recording means 5 via an output line 31 or 32.

The magnetic recording means 5 inputs the clock pulse 21 with write data on the output line 31 or 32 from the shift register 3.
It consists of a modulation circuit 51 that performs F-2F modulation, a write driver circuit 52 that drives a magnetic head 53 with the modulated data, and a magnetic head 53 that magnetically records data in contact with the moving magnetic card 6.

Using the apparatus having the above configuration, the magnetic recording method of the present invention is carried out as follows.

First, all bits of write data that have been processed in a predetermined manner are serially input to the shift register 3 in a predetermined order from the processing device 4, and are temporarily stored as write data 33.

When the data recording area of the moving magnetic card 6 comes to the position of the magnetic head 53, the write clock 21 is applied to the shift register 3, and the write data 33 is sequentially sent to the magnetic recording means 5.

This write data 33 is transmitted by the card movement direction signal 2.
2, the data shift direction of the shift register 3 is controlled so that the corresponding data bit is written to a predetermined recording position on the card.

For example, data r from left to right at a predetermined position on a magnetic card.
Assuming that lll10000J is to be recorded, when recording by moving the magnetic card from left to right in the direction of arrow A, the data on the shift register 4 is shifted to the right, and the least significant bit is shifted from the output line 32 to the beginning. nirooool
If you want to send the data in the order of lllJ and record it by moving it in the opposite direction of arrow B, shift the data to the left,
rllllo from the output line 31 with the most significant bit first.

00'' order.

In this way, by detecting the moving direction of the magnetic card with an encoder and reversing the sending order of the write data according to the moving direction, the recorded data is in the same data format regardless of the card moving direction. can do.

〔Effect of the invention〕

According to the present invention, it is possible to make the recorded Cheetah format the same regardless of whether the magnetic card is moving in the forward or reverse direction. This improves the flexibility of the system, such as allowing card slots to be installed on both sides without increasing the number of cards.

BRIEF DESCRIPTION OF THE DRAWINGS FIG. 1 is a block diagram showing a magnetic recording system according to the present invention, and FIG. 2 is a block diagram showing a conventional magnetic card recording system. In the figure, l, 1゛--encoder, 2-encoder output circuit, 21--clock pulse 22--moving direction signal, 3,3゛--shift register, ゛31, 32--output line. 33...Write data, 4...Processing device,
5--Magnetic recording means, 51-Modulator, 52--
Write driver circuit, 53... Magnetic head, 6-'
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Claims (1)

[Claims] The encoder (1) determines whether the magnetic card (6) is moving in the forward or reverse direction, and writes the write data (33) into the magnetic recording means (
5), the data shift direction of the shift register (3) that is sequentially outputted to the shift register (3) is set in the forward or reverse direction based on the above-mentioned determination result so that the format of the recorded data is the same regardless of the moving direction of the magnetic card (6). A magnetic recording method characterized by switching.