JPS61276075A - Card reader - Google Patents

Abstract

PURPOSE:To cope with plural recording formats by providing a memory in which the demodulation signals of plural kinds of recording formats are stored and by sequentialy changing the demodulation signal at every reading of the recording signal by a pickup to supply them. CONSTITUTION:In the memory 9, the demodulation signals of plural recording formats of magnetic cards are stored, and the stored signals are supplied to a CPU8 under its command. In case of reading out a data from the magnetic card, when the pickup 2 reads the data, the CPU8 supplies to the memory 9 a command signal to supply the demodulation signal of the recording format and designates a demodulator circuit 6 to demodulate based on the supplied signal. In case when the recording format differs, the memory 9 supplies it as sequentially changing its kind, and at the pickup 2 repeating read of the signal is executed until the CPU8 becomes able to decode the data in the card. In such way as aforementioned, plural recording formats can be coped with each other.

Description

DETAILED DESCRIPTION OF THE INVENTION [Field of Industrial Application] The present invention relates to a card reader for cards such as magnetic cards and optical cards that record signals in various recording formats.

[Summary of the invention]

The present invention relates to a card reader for a card such as a magnetic card or an optical card that records signals in various recording formats, and includes a pickup for reading the recorded signal of the card and a data processing unit for decoding the data of the recorded signal of the card. It has a circuit and a memory tray that stores 46 demodulated signals of multiple types of recording formats, and each time a recorded signal of the pickup is read, the demodulated signals of the recorded formats stored in the memory are sequentially changed and supplied to the data processing circuit for decoding. Then, the pickup repeats reading the recorded signal of the card until the data processing circuit can decode the data on the card.In addition, the data on the card in multiple types of recording formats can be decoded and read out. This makes it possible to obtain a general-purpose card reader compatible with a plurality of systems with different card recording formats.

[Conventional technology]

2. Description of the Related Art Conventionally, cards for recording signals, such as magnetic cards and optical cards, have various recording formats for recording signals. However, a single card league that reads recorded signals from a card can only read data from a card in one predetermined recording format.

For example, a magnetic card has a magnetic stripe 'ab' on the front or back side of the card as shown in FIG. There are various modulation methods such as non-return zero (non-return zero) modulation methods, and there are various recording formats in terms of how each bit is used. To explain this recording format in more detail, for example, JIS defines several recording formats as shown below.

- The recording format (hereinafter referred to as recording format A) is 1.
A character consists of multiple bits, and each character is sequentially divided into: Start code 1-character format code 1-character arbitrary data 1-character arbitrary data 1-character horizontal redundant code within the range where the total number of characters does not exceed 79 In some cases, the total number of characters per character was up to 79. In addition, in another recording format (hereinafter referred to as recording format B), 1 character is composed of multiple bits, and each character is sequentially divided into a starting code, 1 character format code, 1 character account number, and a maximum of 19 character separation codes.
1-character separation code 1-character terminal code 1-character horizontal redundant code 1-character total There are some with a maximum of 79 characters. There are various other recording formats as well.

As described above, there are various recording methods and recording formats that constitute the recording format, and the recording format is unified for each system that uses cards such as cards such as cards and magnetic cards.

[Problem that the invention seeks to solve]

However, the recording format is not unified among systems using cards such as magnetic cards, and each system has to have its own card league, which is an inconvenience.

That is, if the modulation method is different as a recording method, the demodulation method in the demodulation circuit is different, and if the recording format is different like recording formats A and B mentioned above, the data decoding method is different, and each recording format is different. Requires a card league. This is especially true now that many systems, including Katsushini cards, credit cards, and ID cards, use CarP, which stores data on magnetic cards, etc., and it is extremely difficult to provide a card league for each system. The problem was that there was a lot of waste.

In view of these points, it is an object of the present invention to provide a card league compatible with the recording format of the 'a number.

[Means for solving problems]

As shown in FIGS. 1 and 2, the card league of the present invention includes a big ara f (2) that reads the recorded signal of the card 1 on which the signal has been recorded, and a data processing circuit (2) that decodes the data of the recorded signal of the card a. 8), and a memo IJ (9) that stores demodulated signals of multiple types of recording formats. :'
The data processing circuit (8) is configured to sequentially change and supply demodulated signals of the recording format stored in the memory for decoding to the data processing circuit (8) each time the recording signal of the pickup (2) is read. The pickup (2) repeatedly reads the recorded signal of the card A until the data of the card A can be decoded.

[Effect]

In the card reader of the present invention, the data recorded on the card a is processed in the pickup (2) until the data on the card can be encoded in the data processing circuit (8) by the demodulation signal of the recording format that changes sequentially from the memory (9). By repeating reading, data can be decoded even if the card is stored in the memory (9) in any of multiple recording formats, making it a general-purpose card compatible with multiple systems. You can get a leader.

〔Example〕

Hereinafter, one embodiment of the card reader of the present invention will be described with reference to the accompanying drawings.

The card reader of this example is constructed as a card reader for the magnetic card a shown in FIG.

In Fig. 1, (1) shows the entire card reader, and (1) shows the entire card reader.
2) shows a pickup consisting of a magnetic head that reads out the stored contents of a magnetic card, that is, data and a clock that correspond to a specific number or turn. By running the magnetic card in the forward or backward direction, the stored contents of the magnetic card are read out. Amplifying the output signal of the pickup (2) <3
)* to the peak detection circuit (4), and the output signal of the peak detection circuit (4) is supplied to the demodulation circuit (6) via the waveform shaping circuit (5).

This demodulation circuit (6) demodulates the stored contents of the magnetic card in accordance with a recording method 1, such as FM modulation, specified by a recording method instruction signal supplied from a data processing circuit (8), which will be described later, to generate a data signal. The clock signal is separated from the clock signal. The data signal and clock signal obtained by this separation circuit are supplied to a shift register (7), and the clock signal is supplied to a data processing circuit (hereinafter referred to as CPU) (8). This shift register (7) performs serial-to-no-parallel conversion on the data signal in synchronization with the clock signal, converts it into a bit signal, and supplies the bit signal to the CPU (8).

For example, (9) indicates a non-volatile memory, and this memory (
The demodulated signals of the recording formats of a plurality of magnetic cards can be stored in the memory (9), and the demodulated signals of the recording formats stored in the memory (9) are supplied to the CPU (8) in response to instructions from the CPU (8). The CPU (8) decodes the data which has become a bit signal from the shift register (7) using the demodulated signal of the recording format supplied from the memory (9).

Then, each time a new recording format posttone signal is supplied from the memory (9), the CPU (8)
A recording format switching signal is supplied from the CPU (8) to the demodulation circuit (6), and a motor control signal is sent from the CPU (8) to the motor control circuit αQ to rotate the motor α force for running the magnetic card in the forward or reverse direction for a certain period of time. supply. Furthermore, the data decoded by the CPU (8) is supplied to the modulation/demodulation device (6). This modem (b)
The decoded data obtained in the above are modulated onto a carrier wave and supplied to the terminal. In addition, the carrier wave obtained from the outside at the terminal (6) is demodulated by the modem device (6) and the CPU (8
).

As above, the card reader (1) is 7! ! When reading data from magnetic card a, first the CPU (8
) supplies a motor control signal to the motor control circuit aQ, rotates the motor α force, for example, in the positive direction, causes the magnetic card a to travel in the forward direction, and causes the pickup (2) to read the memory contents of the magnetic card a. . And CPU (
8) to the memory (9) to supply a demodulated signal of the recording format to the CPU (8), and based on the supplied demodulated signal of the recording format, the CPU (8)
A recording method instruction signal is supplied from U (8) to the demodulation circuit (6) to instruct the demodulation method. The data demodulated by this designated demodulation method is designated and decoded by the CPU (8). Here, the recording format of the data recorded on the magnetic card a is, for example, the above-mentioned FM modulation method, recording format A.
Assuming that the recording format specified from the memory (9) is also the FM modulation method and the recording style Bujin,
The recording formats match and the data can be decoded.
The carrier wave of the decoded data 5 is obtained at the terminal (2), and reading of the stored contents of the magnetic card 1 by the card reader (1) is completed. However, if the recording format of the data recorded on the magnetic card a is, for example, recording format B, but the recording format instructed from the memory (9) is recording format A, the recording formats are different and the data is decoding becomes impossible.

At this time, the CPU (8) supplies the motor control signal to the motor control circuit (7) again, and the magnetic card a
is run in the opposite direction from the previous time, that is, in the backward direction, and the contents stored in the magnetic card a are read again by the pickup (2).

Then, the CPU (8) supplies a command signal to the memory (9) again to cause the CptJ (8) to supply a demodulated signal in a recording format different from the previous one, and in the same way as the previous time, the command signal is supplied to the memory (9). Demodulation is performed using a demodulation method based on the demodulated signal, and data is decoded using a recording format. Here, when the recording format recorded on the magnetic card a matches the recording format instructed from the memory (9) this time, the data can be decoded, and the carrier wave of this decoded data is sent to the terminal (to). obtained,
The reading of the stored contents of the magnetic card a by the card reader (1) is completed. Furthermore, if decoding is impossible due to a recording format mismatch, the above operation is repeated to try decoding with a demodulated signal of another recording format.

As described above, data reading operations are performed on the same magnetic card using demodulated signals of different recording formats as many times as necessary until the data can be decoded. However, if the same magnetic card cannot be decoded with the demodulated signals of all the recording formats stored in the memory (9), the read operation is terminated.

In the case of this example, the data obtained from the card reader (1) is transferred to the system center (1) as shown in FIG.
Supply to 0. That is, the carrier wave obtained at the terminal (to) is transmitted by wire or wirelessly to the terminal α◆, and the carrier wave is supplied from terminal 4 to the modem αQ of the system center (2),
The modulator αQ demodulates the carrier wave and supplies the data to the host CPUa, and the host CPUa performs the necessary processing based on the data.
Communication is carried out between the CPU (8) on the ) side and the CPU (8) on the system center (A) side.

As described above, the card reader (1) can obtain data on magnetic cards in various recording formats by repeating reading of the magnetic cards until the data can be decoded. Therefore, one device can serve as a card reader for various magnetic cards whose recording formats are incompatible, and has the advantage of having versatility. This also leads to a reduction in the cost required for system configuration using magnetic cards.

In the above-mentioned embodiment, each time the magnetic card is read by the pickup (2), the forward direction and the backward direction are repeated. It may also be an action of simply sending a card. Furthermore, the order in which the demodulated signals of the recording format to be decoded is switched is either stored in the memory (9) and switched in a certain order, or it is possible to automatically decode it by determining the frequency of the card used, etc. Various methods can be considered, such as switching from the one with the highest quality. In addition, it is possible to change the recording method by switching only one of the recording method and recording format sequentially, or by switching the recording method after every several readings and the recording format after each reading. Various methods can be considered for combinations of switching between the recording format and the recording format. Furthermore, although the card reader (1) is configured as a card reader for magnetic card a as shown in Fig. 2, it can also be used to store other data such as other types of magnetic cards, optical cards that perform optical reading, etc. The present invention can also be applied to card readers for various cards. Furthermore, the present invention is not limited to the above-described embodiments, and it goes without saying that various other configurations can be made without departing from the gist of the present invention.

〔Effect of the invention〕

According to the card reader of the present invention, since it is possible to decode data on cards with multiple types of recording formats and output signals, it is possible to use a system using cards each adopting a different type of recording format. It has the advantage of being versatile as it can also be used as a card reader. Nineteenth, this leads to a reduction in the cost required for system configuration.

[Brief explanation of drawings]

FIG. 1 is a block diagram of a card reader of the present invention, and FIG. 2 is a front view showing an example of a magnetic card. (1) is a card reader, (2) is a pickup, (6)
is a demodulation circuit, (8) is a data processing circuit, (9) is a memory, and a is a magnetic card. , 6m glossy 1-1 da 11 nails (Imomilco Figure 2)

Claims (1)

[Scope of Claims] A pickup that reads the recorded signal of a card on which the signal is recorded, a data processing circuit that decodes the data of the recorded signal of the card, and a memory that stores demodulated signals of a plurality of types of recording formats. , the demodulated signal of the recording format stored in the memory for decoding is sequentially changed and supplied to the data processing circuit each time the recording signal of the pickup is read, so that the data of the card can be decoded by the data processing circuit. A card reader characterized in that the pick-up repeatedly reads the recorded signal of the card until the signal is read.