JPH05128415A - Automatic compensation method of encode position - Google Patents

Abstract

PURPOSE:To write magnetic data at an exact position from a first sheet and to issue it by correcting the deviation in encode position while performing a recording of written magnetic data and if there is an encode position deviation and by rewriting into a magnetic card. CONSTITUTION:Same number of clock signals are written by a write magnetic head 5 at preambles and postambles located before and after an encode position of the data located at the center of magnetic card A. Then, the number of clock signals of the preamble is read by a read magnetic head 9 and a CPU 4 decides an encoder position. And when the number of clock signals matches with a prescribed number, the card A is transmitted as it is and when these number do not match with each other, the card A is returned to an original position, the timer value of a timer circuit 6 is changed in accordance with the mismatch and a rewriting is performed against the card A. Thus, a writing is performed at the exact position from the sheet number one.

Description

Detailed Description of the Invention

[0001]

BACKGROUND OF THE INVENTION 1. Field of the Invention The present invention relates to a method for automatically correcting an encoded position when magnetic data is written and issued at a regular encoded position of a magnetic card.

[0002]

2. Description of the Related Art For example, a ticket vending machine installed at a station writes predetermined magnetic data on a ticket (magnetic card) to be issued, and in that case, the magnetic data writing position (encoding position) is magnetic according to the regulations. Since it is located almost in the center of the card, a method is generally used in which the tip of the card is detected by a photoelectric sensor while the magnetic card is being transported at a constant speed, and magnetic data is written after a set time from the detection time. Has been done.

However, in the above method, the relative position between the photoelectric sensor and the writing magnetic head varies due to the machine difference of the magnetic card issuing machine such as a ticket vending machine, so that the correct recording position on the magnetic card can be accurately written. It has become difficult, and the relative position has to be adjusted for each device, which is complicated.

For this reason, in Japanese Utility Model Publication No. 63-31156, a predetermined number of clock signals are written from the detection of the leading edge of the magnetic card, magnetic data is subsequently written, and then the clock signal and magnetic data are read. The number of clock signals until the magnetic data is read is compared with the reference number, and the above-mentioned predetermined number of clock signals is decreased or increased from the subsequent magnetic card depending on the number of the clock signals from the reference number. There is disclosed a technique for correcting the encoding position by using. According to this, the magnetic data encoding position of the magnetic card issuing machine is automatically adjusted on the device side.

[0005]

However, in the technique described in the above publication, the first magnetic card passed through the magnetic card issuing machine is used for the correction judgment of the encode position and the encode position is corrected. Therefore, there was a problem that it wasted accordingly.

SUMMARY OF THE INVENTION Therefore, an object of the present invention is to provide an automatic encoding position correcting method which eliminates the need for a relative position between a photoelectric sensor and a writing magnetic head in a magnetic card issuing machine and can eliminate waste of the magnetic card.

[0007]

SUMMARY OF THE INVENTION The present invention is a method for correcting the encoded position of data to be written on a magnetic card, in which the magnetic card is conveyed at a constant speed and the tip of the magnetic card is detected by a photoelectric sensor. Then, the magnetic data is written after a predetermined timer time has elapsed from the time when the leading edge was detected, and then the written magnetic data is read, and when there is a deviation in the encoding position, the deviation is dealt with. After correcting the timer time, the automatic encoding position correction method repeats the processes from the detection of the leading end of the magnetic card to the data writing.

[0008]

According to the present invention, when the magnetic data is written in the magnetic card at an encoding position a predetermined distance from the card tip and is issued, if the encoded position of the written magnetic data is deviated, This deviation is corrected and the magnetic card is rewritten.

[0009]

As described above, since the rewriting corresponding to the shift is performed on the same magnetic card, it is possible to write and issue the magnetic data at the correct position from the first sheet.

[0010]

DETAILED DESCRIPTION OF THE PREFERRED EMBODIMENTS An embodiment of the present invention will be described in detail below with reference to the drawings. FIG. 1 shows a control circuit according to the encoding position automatic correction method of the present invention. A transport path 1 for transporting the magnetic card A at a constant speed is provided, and a magnetic card A transported upstream of the transport path 1 is shown. A photoelectric sensor 2 for detecting the tip is arranged, and a detection signal of this photoelectric sensor 2 is sent to a CPU 4 through a sensor input circuit 3.

On the other hand, a write magnetic head 5 is provided at a downstream position at a distance L from the photoelectric sensor 2 on the above-mentioned transport path 1, and the CPU 4 receives the time-up signal from the timer circuit 6 to output the output circuit 7 and the write circuit 8. The magnetic card A is configured to be written by the write magnetic head 5. Further, a read magnetic head 9 is provided at a position downstream of the write magnetic head 5 so that the write magnetic head 5 reads the signal written on the magnetic card and sends it to the CPU 4 via the read circuit 10 and the input circuit 11. Has been done. The processing operation described later by the CPU 4 is recorded in the memory 12.

Further, in the automatic encoding position correcting method of this embodiment, as shown in FIG. 4, the same number of clock signals a to a are added to the preamble and the postamble before and after the encoding position of the data in the center of the magnetic card as described above. The magnetic head 5 writes and then the read magnetic head 9 reads the number of preamble clock signals, and the CPU 4 determines the encoder position depending on whether the number of preamble clock signals is equal to a specified number or is increased or decreased. Then, when they match, that is, when the data is written in the correct encoding position, the magnetic card A is sent to the left side of FIG. 1 as it is, and when they do not match, the magnetic card A is returned to the original position and the mismatch The timer value x of the timer circuit 6 is changed and the magnetic card A is rewritten.

Therefore, the timer value x of the timer circuit 6 is the preamble clock signal a to the magnetic card A after the time when the magnetic card A reaches the write magnetic head 5 from the time when the photoelectric sensor 2 detects the tip of the magnetic card A. When it is set to write a, and there is an error in the reading judgment of the preamble by the reading magnetic head 10,
The CPU 4 described above is adapted to change the timer value x according to the error.

Next, the encoding position automatic correction method of the present invention will be described with reference to the flowchart of FIG. 2 and the time chart of FIG. The magnetic card A is sent from a predetermined position, the photoelectric sensor 2 detects it, the sensor output shown in FIG. 3 is sent to the CPU 4, and the CPU 4 causes the timer circuit 6 to operate.
Is set (step n1).

The above-mentioned timer circuit 6 times up after the lapse of xms in FIG. 4, the writing magnetic head 5 writes signals for the preamble, data, etc. to the magnetic card A from the time-up time, and then the writing is performed. The embedded signal is read by the read magnetic head 9 (step n2,
n3, n4).

Of the above-mentioned read signals, the CPU 4 collates the number of clock signals for the preamble with a prescribed number, and if they match, terminates the sending-out process of the magnetic card A (step n5).

However, when they do not match, the correction value y of the timer circuit 6 is calculated from the deviation number, the timer value x of the timer circuit 6 is corrected, and the magnetic card A is returned to its original position ( Steps n6, n7, n8). Then, the processes of steps n1 to n8 are performed again.

The encoding position of the magnetic card A thus issued is read from the number of clock pulses of the preamble to determine whether it is in the proper position. When it is not in the proper position, the magnetic card A is pulled back and Since the misalignment of the encoding position is corrected and rewriting is performed, the encoding position can be automatically corrected without adjusting the distance L between the photoelectric sensor 2 and the writing magnetic head 5, and the transport path can be obtained. The first magnetic card A passed through 1.
It is possible to write a signal to a regular encoding from.

[Brief description of drawings]

FIG. 1 is a control circuit diagram used for explaining an encoding position automatic correction method according to the present invention.

FIG. 2 is a flowchart showing a processing operation in the encoding position automatic correction method of the present invention.

FIG. 3 is a time chart in the encoding position automatic correction method of the present invention.

FIG. 4 is a plan view showing the encode position of the magnetic card in the encode position automatic correction method of the present invention.

[Explanation of symbols]

 1 ... Transport path 2 ... Photoelectric sensor 4 ... CPU 5 ... Write magnetic head 6 ... Timer circuit 9 ... Read magnetic head A ... Magnetic card

Claims (1)

[Claims] 1. A method for correcting an encoding position of data to be written on a magnetic card, wherein the magnetic card is conveyed at a constant speed, a photoelectric sensor detects a front end of the magnetic card, and the front end is detected in advance. The magnetic data is written after the lapse of a predetermined timer time, the written magnetic data is read next, and when there is a deviation in the encoding position, the timer time is corrected in response to the deviation. After that, an encoding position automatic correction method in which the processes from the detection of the leading edge of the magnetic card to the data writing are repeated.