JPS62119706A - Magnetic recording and reproducing device - Google Patents

Abstract

PURPOSE:To eliminate the necessity of exchanging the magnetic stripes of all bankbooks at once so as to easily cope with a change in the recording density of the magnetic stripe, by determining the recording density of the magnetic stripes of bankbooks, etc., by detecting feature parts, such as notch, etc., of the bankbooks and automatically reading and writing data. CONSTITUTION:On magnetic bankbooks 20 and 20' provided with magnetic stripes (MS) 21 and 21' having different recording densities a featured part, such as a notched part 22, etc., is installed to one magnetic bankbook 20' having a different recording density. The featured part of the notch 22, etc., is detected by means of a sensor 1 and the recording density is decided with a decision circuit 2, and then, data are recorded and reproduced in accordance with the detected recording density. Therefore, recording and reproducing magnetic data on and from a magnetic bankbook provided with an MS having a different recording density can be easily and surely performed.

Description

[Detailed Description of the Invention] [Table of Contents] Overview Industrial Application Fields Conventional Technology Problems to be Solved by the Invention Means for Solving the Problems Actions Examples Effects of the Invention [m Required] Magnetics with different recording densities - In a magnetic recording carrier such as a magnetic passbook having a stripe, one magnetic recording carrier with a different recording density is provided with a characteristic part such as a notch, and the recording density can be determined by the characteristic part such as the notch, and the recording density is determined by the characteristic part such as the notch. Data can be recorded and reproduced according to the determined recording density.

[Industrial application field]

The present invention relates to a data recording/reproducing method for a magnetic recording device, and more particularly to a data recording/reproducing device for magnetic recording media with different recording densities provided on a magnetic recording carrier such as a magnetic passbook used in a bank.

[Conventional technology]

WLs having magnetically recorded data are widely used in various fields. For example, passbooks used in banks are affixed with MS (Magnetic Stripe) to facilitate processing by automatic teller machines.

That is, the customer name, bank code, account number, and balance are recorded in this MS, and at the time of transaction, the recorded contents are reproduced to check whether the transaction is possible or not.

Furthermore, when a transaction is possible, upon completion of the transaction, the data in the MS is updated according to the details of the transaction in preparation for the next transaction.

This MS data is in a format determined by each bank, and can be freely used by users at each bank's counter.

[Problem that the invention seeks to solve]

As mentioned above, passbooks can be used by each bank, but the amount of data may not be sufficient in the initial format, or the data recording density may need to be increased to accommodate a large amount of data. There must be. However, when the data recording density is increased, there is a problem in that it becomes impossible to read or write data from the MS because it is not possible to respond to changes in the recording density if the data storage density is increased. .

The present invention was made to solve the above problems, and an object of the present invention is to provide a data recording/reproducing device that can easily read data having different recording densities.

[Means for solving problems]

In order to solve the above problems, in the present invention, as shown in FIGS. 1(b) and (C), a magnetic passbook 20. ', one magnetic passbook 20' having a different recording density is provided with a characteristic part such as a notch 22, and the characteristic part of the notch 22'4 is detected by the sensor 1 as shown in FIG. 1(a). , the recording density is determined by the determination circuit 2, and data is recorded and reproduced according to the detected recording density.

[Effect]

With this configuration, MSs with different recording densities can be
It becomes possible to easily and reliably record and reproduce magnetic data on a passbook having a bankbook.

〔Example〕

Hereinafter, an embodiment of the present invention will be described based on FIGS. 2 to 4 and with reference to FIG.

FIG. 1(1)), (C1) is an example of a bank passbook used in the magnetic recording/reproducing apparatus of the present invention, and two passbooks 20 and 20' each having an MS are shown.

TsuwL2(1)MS211! , for example 100 bit
/! '(7) Data is recorded with density, and passbook 2
0'MS21' is different from that, for example, 200bi
Data is recorded at a density of L/n. And passbook 2
0' has a recording density of 200 bits/! A notch 22 is provided to indicate that it is a holder.

As explained with the principle diagram in FIG. 1(a), when this passbook 20' is set in the MS unit 3 in FIG. Accordingly, the CPU 4 instructs the operation to be performed in accordance with the recording density of 200 bits/!n.

There are various formats of magnetic data recorded in the MS, and for example, there is one as shown in FIG. FIG. 4(a) shows a signal recording method called F2F. As shown in the figure, "02" indicates that there is no change during period T;
1" means that the 1.ow level and High level alternate once in the period T, and the alternation period in the case of "1" is 1/2T. FIG. 4(b) shows F3F, and this In the case of "1", the LOW level and the High level alternate in a period of 1/3T with respect to the period T.

Next, the operation when the FZF method is used as the recording method for the MS will be explained using the circuit block diagram of an embodiment of the present invention shown in FIG. 2 and the operation waveform diagram shown in FIG. 3.

A head 31 is moved by a drive device to read data from an MS installed in a bankbook or the like. This is amplifier 32
Amplify by. This waveform is read out as a signal like waveform a. In waveform a, the signals of “0” and “1” are F.
This is a readout waveform of the MSIJ-dohesode 31 when sent using the ZF method, and a part of the waveform a includes noise A. The gate signal detector 33 detects this waveform a at a level VT
The gate signal S is obtained by slicing with and -VT. On the other hand, a peak signal C is obtained by the peak signal detector 34. This means that the signal is in phase from one peak to the other, reverses at the next peak, and remains in phase until the next peak. Both the gate signal S and the peak signal C are input to the data detection section 35. Data detection section 3
5 includes, for example, an AND gate 35-1 and an edge signal detector 35-2. The edge signal detector 35-2 generates an edge signal d having a peak at an edge portion of the peak signal C. Of these, B is a noise component.

This edge signal d and gate signal S are AND gate 35-
1 to obtain an edge signal e from which noise component B is removed.

On the other hand, the sensor 1 detects the notch in the passbook, the determination circuit 2 detects the recording density of the MS, and transmits this to the CPU 4 (The CPU 4 obtains this information and controls the timer 45, A data judgment signal f is generated according to the recording density. Based on this signal f and the edge (δ number e), the data judgment unit 36 detects "0" and "1". That is, the data judgment signal f is the edge signal Since it starts at the same time as the start of e and the period lasts for 374T, it is determined to be "0" if there is no peak of edge signal e during this period, and "1" if there is a peak of edge signal e during this period.

It goes without saying that the duration of the data determination signal f is not fixed and changes depending on the detected recording density. In addition, as a means for displaying characteristic parts, it is possible to use not only a notch but also other appropriate means such as providing a mark and making use of the presence or absence of a mark and making use of differences in shape, using magnetic ink, or using a different medium size.

As described above, by detecting characteristic parts such as notches in the bankbook, the data determination signal f is automatically adjusted, and data is read using the signal f corresponding to the detected recording density.

〔Effect of the invention〕

As described above, according to the present invention, the recording density of an MS such as a bankbook is determined by detecting characteristic parts such as notches provided in the bankbook, and data is automatically read and written. , it is not necessary to replace all MSs in passbooks at once, and it can easily respond to changes in the recording density of MSs. Therefore, it can easily respond to increases in data in MSs such as passbooks. Furthermore, this change in recording density does not cause any inconvenience to users.

[Brief explanation of drawings]

FIG. 1 is a diagram showing the principle of the present invention, FIG. 2 is a configuration of an embodiment of the present invention, FIG. 3 is an operational waveform diagram, and FIG. 4 is an example of a recording format. 1--Sensor 2-Judgment circuit 3-M S unit 4-CP U3O,20'--Passbook 21.21'-=MS (Magnetic stripe)

Claims (1)

[Claims] Regarding the method of recording and reproducing data on a magnetic stripe attached to a medium, the recording density of the magnetic stripe is determined based on information obtained from the medium, and data is deciphered based on the recording density when recording and reproducing data. Featured device.