JPH02172066A - Data writing system for magnetic card - Google Patents

Abstract

PURPOSE:To attain sure data write by writing a prescribed data onto a magnetic card together with the information of an amplitude stored in advance at every writing bit. CONSTITUTION:A CPU in a controller 50 reads address amplitude information from a ROM 52 in response to the position at every bit of write information, adds it with the output of an encoder 45 via a D/A converter 44 at a writing driver 37 and gives the resulting signal to a magnetic head 26. A regenerative signal is amplified and given to an A/D converter 42 and a decoder 43. All the information is stored in a RAM 53 under the control of the CPU of the controller 50 after decoding. The A/D converter 42 converts the amplitude information into digital information in response to the information location of each bit and stores the result to the RAM 53. The CPU of the controller 50 reads the amplitude information from the ROM 52, compares it with the information in the RAM 53 and when they are coincident, the information in the RAM 53 is used and if dicordant, the card is rejected. Since the amplitude information is added in addition to the information, the information is written surely.

Description

[Detailed Description of the Invention] (Industrial Application Field) The present invention relates to a data writing method that can write predetermined data onto a magnetic card, and in particular, the present invention relates to a data writing method that can write predetermined data onto a magnetic card, and in particular, the present invention relates to a data writing method that can write predetermined data onto a magnetic card. Regarding the writing method.

(Prior Art) This type of data writing method is known as one capable of writing predetermined data onto a magnetic card.A magnetic card reading/writing device using such a magnetic card data writing method is used in telephones, automatic ticket vending machines, automatic vending machines, etc.

This magnetic card data writing method simply writes data onto the magnetic card. Therefore, copies of magnetic cards can be easily made using the method shown in FIG. That is, data is read from a copy source card 1 via a reading magnetic head 2, the read data is amplified by an amplifier 3, and then waveform-shaped by a waveform shaping circuit 4, and the waveform-shaped signal is generated by the waveform shaping circuit 4. driver 5
The signal from the driver 5 drives the write magnetic head 6 and copies it to the copy destination card 7.

At this time, signals from position detection sensors 8.9 that detect the positions of the copy source card 1 and the copy destination card 7 are input to the logic circuit 10, and the positions of each card and the movement speed of each card are synchronized. let

In this way, the conventional magnetic card data writing system allows information to be easily copied.

[Problem to be solved by the invention]

Therefore, in the conventional magnetic card data writing method,
There was a problem that data could not be written reliably. In particular, it could not be said that countermeasures against copying had been fully implemented.

The present invention has been made to solve the above-mentioned problems, and an object of the present invention is to provide a data writing method for a magnetic card that allows data to be reliably written without being copied.

[Means to solve the problem]

In order to achieve the above object, a data writing method for a magnetic card according to the present invention is a data writing method that can write predetermined data to a magnetic card, and when writing data to the magnetic card, For each bit written,
The present invention is characterized in that the data can be written to a magnetic card together with pre-stored amplitude information.

[Effect]

When there is data to be written, amplitude information is patterned and stored in advance along the writing position of the magnetic card. Amplitude information is extracted and write data is written together with the extracted amplitude information. Therefore, data whose amplitude changes for each bit is written to the magnetic card.

When reading a magnetic card written in this manner, two pieces of information, amplitude and data, are obtained for each bit from the magnetic card. Then, when the amplitude information is read for all data for two minutes, the read data is used on the condition that it matches a pre-stored pattern.

Therefore, in the conventional device, the amplitude information will be lost, making it impossible to use the B6B card.

〔Example〕

Hereinafter, the present invention will be explained based on illustrated embodiments.

1 to 7 are diagrams shown for explaining one embodiment of the present invention.

FIG. 2 is an explanatory diagram showing a magnetic card used in an embodiment of the present invention.

This magnetic card 7 is a flexible one made of thin plastic, paper, etc., and has a second magnetic card on its surface.
As shown in FIG. 1, other necessary information (sales amount, issuer name, etc.) is printed in an area 13 for displaying the payment amount and its payment status, and in an area 14.

In addition, on the magnetic car 7 is shown in FIG. 2 (II
) As shown in Fig. 1, a magnetic stripe 1 as a magnetic recording medium is used.
5 is provided.

FIG. 3 is a configuration diagram showing the configuration of the magnetic card reading/writing device.

The magnetic card reading/writing device 20 is configured as follows. That is, at a position corresponding to the card insertion slot 21, a pair of feed rollers 22 and 23 are provided so as to be rotatable in parallel. A reading magnetic head 24 is provided adjacent to the feed rollers 22,23. The reading magnetic head 24 reads data such as the amount of money and the issuer from the data magnetic stripe 15 of the magnetic card 7. The reading magnetic head 24 is provided with a pressing roller 25 . A write magnetic head 26 is provided near the read magnetic head 24 . This write magnetic head 2
G is for writing monetary data on the data magnetic stripe 15. The write magnetic head 26 is provided with a pressing roller 27 .

Further, reflective optical position detection sensors 28, 29, and 30 for detecting the position of the magnetic card 7 are provided.

These reflective 4-position detection sensors 28, 29, and 30 are
This is to detect the position of the magnetic card 7 inside the device. A further pair of feed rollers 31.32 are rotatably provided in parallel to the pair of feed rollers 22.23. A punch mechanism 33 is provided on the left side of the feed rollers 31 and 32 in the drawing. The punch mechanism 33 is configured to punch a hole in the area 13 of the magnetic card 7 according to a punch command. It has grooves. Further, a pair of rollers 33 and 34 are provided to be rotatable in parallel, and a card contact detection sensor 35 that also serves as a stopper is provided on the right side of the rollers 33 and 34 in the drawing. The feed roller 22, feed roller 31, and roller 33 are connected to a driving step motor 36 via a mechanism not shown, and rotate according to the rotation of the step motor 36.

The reading magnetic head 24 and the optical position detection sensor 28.
29 and 30, the punch mechanism 33, and the card contact detection sensor 35 are electrically connected to the control circuit 40. Further, the control circuit 40 is electrically connected to the write magnetic head 26 via the write driver 37.

Further, the control circuit 40 is configured to rotate the step motor 36 via the motor controller 38.

FIG. 5 is a configuration diagram showing the control circuit 40. As shown in FIG.

The control circuit 40 includes an amplifier circuit 41, an analog-to-digital converter (AD converter) 42, a decoder 43, a digital-to-analog converter (DA converter) 44, and an encoder 45.
, an input/output section 46 , and a controller 50 . During reading, a signal from the reading magnetic head 24 is amplified by an amplifier circuit 41 and applied to an AD converter 42 and a decoder 43. The AD converter 42 digitizes the amplitude information corresponding to each bit and outputs it to the human output unit 4.
It is designed to be given to 6.

The decoder 43 is configured to provide data to the input/output section 46.

On the other hand, during writing, amplitude information IN corresponding to each bit is given to the driver 37 via the DA converter 44. Further, the write data is provided to the driver 37 via the encoder 45. Detection signals detected by the optical position detection sensors 28, 29, and 30 are input to the input/output section 46. The punch mechanism 33 and the motor 36 are controlled by a controller 50 via an input/output section 46.

A signal detected by a card contact detection sensor 35 which also serves as a stopper is inputted to a human output section 46.

The controller 50 includes a CPU 51, a ROM 52, and a RAM.
53, interface 54, external interface 5
5, and a ROM 52, a RAM 53, an interface 54, and an external interface 55 are connected to the CPt 151. C of control circuit 5o
Although not shown, the PU 56 is equipped with a timer. As shown in FIG. 6, amplitude information is written on the RO stand 52 in correspondence with each bit, with the same length as the write data length of the magnetic card 7. Also, this R
A program for realizing the control circuit 40 is stored in the OM 57.

FIG. 1 is a circuit diagram showing a signal system including a data writing method for a magnetic card.

The data writing method of the magnetic cart' is configured as follows. Write data from the processing device 19 is supplied to cpust of the controller 50 via an interface 55. Then, the CPU 51
Amplitude information of an address corresponding to the position of the data bit is read out from the ROM 52 for each data bit. This read amplitude information is sent to the CPU
51, the digital signal is converted into an analog signal. At the same time, the write data is given to the encoder 45 and converted into a predetermined signal. These signals are summed and amplified by a write driver 37 and then supplied to the write magnetic head 26.

The data written to the magnetic card in this way is demodulated as follows. That is, the signal reproduced by the magnetic card 7 is amplified by the amplifier circuit 41 and sent to the AD converter 4.
2 and a decoder 43.

The decoder 43 demodulates the data and the controller 50
CPU5] under the control of llA? The data is to be given to I53. Similarly, the AD converter 42 converts amplitude information into digital information according to each bit and the position of the data, and supplies the data to the RAM 53 under the control of the CPt 151 of the controller 50. Then, the CPt 151 reads amplitude information from the ROM 52 and matches it with the amplitude information in the RAM 53. If the matching results match, cpust uses the data stored in the RAM 53, but if the matching results do not match, the data is rejected as an incorrect magnetic card.

The operation of the embodiment configured in this way will be explained.

Data writing operation of magnetic card> Write data from the processing device 19 is sent to the controller 5.
0 CPL 151 via the interface 55. Then, the CPU 51 reads from the ROM 52 amplitude information of an address corresponding to the position of the data bit for each data bit. This amplitude information is
As shown in FIG. 5, information having different amplitudes for each bit with respect to data length is digitized and stored in the ROM 52. This read image ψg t* m is
The digital signal is converted into an analog signal under the control of 1. At the same time, the write data is given to an encoder 45 and converted into a predetermined signal. These signals are summed and amplified by the write driver 37 and then sent to the write magnetic head 2.
6. When data is written to the magnetic card 7 using such a signal, as shown in FIG. 6, it is recorded as a waveform with a different amplitude for each bit.

<Data continuous output operation of magnetic card> The data written as described above is demodulated as follows. That is, the signal reproduced by the 6R card 7 is amplified by the amplifier circuit 41 and given to the AD converter 42 and the decoder 43. The decoder 43 demodulates the data and sends it to the RA under the control of the CPU 5L of the controller 50.
Give the data to M53. As a result, RAM53
will store all the data on the magnetic card.

Similarly, the AD converter 42 converts amplitude information into digital information according to each via) and the position of the data, and stores it in the RAM 53 under the control of the CPU 51 of the controller 50. Give the boar data. As a result, all amplitude information regarding the amplitude of the magnetic card is stored in the RAM 53. Then, the CPU 51 reads amplitude information from the ROM 52, and reads the amplitude information from the RA? 153 amplitude information. Here, if the matching results match, the CPU 51 uses the data stored in the RAM 53. CPt! 51, when the matching results do not match, it is determined that the magnetic card 7 is incorrect and the data is excluded.

Since it operates in this manner, data can be reliably written to the magnetic card. Further, even if the information is copied using a normal method, information regarding the amplitude cannot be copied.

[Effects of the Invention] As described above, according to the present invention, since each bit is written to a magnetic card with a different amplitude, amplitude information is added to the data, so data can be reliably written. It is very effective to be able to write on it. Further, according to the present invention, since the amplitude information is lost in the conventional device, it is no longer possible to use the magnetic card when copying.

[Brief explanation of the drawing]

FIG. 1 is a perspective view showing an embodiment of a data writing system for a magnetic card according to the present invention, FIG. 2 is a diagram showing a magnetic card used in the embodiment, and FIG. 3 is a device implementing the embodiment. 4 is a block diagram showing the control circuit of the device, FIG. 5 is an explanatory diagram showing amplitude information, FIG. 6 is an explanatory diagram showing the waveform written in the same embodiment, and FIG. 7 is a conventional diagram. FIG. 2 is an explanatory diagram of a copying method. 20...Magnetic card reading/writing device, 40...Control■
Circuit, 50...controller.

Claims (1)

[Claims] In a data writing method that allows predetermined data to be written to a magnetic card, when writing data to the magnetic card, the data is written to the magnetic card together with pre-stored amplitude information for each writing bit. A data writing method for a magnetic card, which is characterized by the ability to write data.