JP3626825B2 - Magnetic data processing device - Google Patents

Description

[0001]
BACKGROUND OF THE INVENTION
The present invention relates to a magnetic data processing device, and more particularly to a magnetic data processing device suitable for processing magnetic data stored in a ticket.
[0002]
[Prior art]
Currently, as shown in FIG. 3, there are three types of recording methods for magnetic data recorded on tickets (including cards such as prepaid cards and stored fair cards): FM, MFM, and NRZ. There is a method. Therefore, station equipment such as an automatic ticket gate is configured to be able to cope with any system.
[0003]
This will be further described with reference to FIG. 4. FIG. 4A is a block diagram showing a schematic configuration of a magnetic data processing device for an automatic ticket gate.
[0004]
The read head 1 reads the data recorded on the tickets inserted in the automatic ticket gate. The signal read by the read head 1 is an NRZ signal generation circuit 2 formed by a hybrid IC, and The F2F signal generation circuit 3 formed by a hybrid IC is configured to be input to each.
[0005]
The NRZ signal generation circuit 2 generates an NRZ signal by simultaneously processing each other track on the basis of the clock track recorded on the tickets, and outputs the NRZ signal to the subsequent determination CPU (main CPU) 4. I have to.
[0006]
The F2F signal generation circuit 3 detects the width of data recorded for each track recorded on the tickets, generates the F2F signal, and outputs the generated F2F signal to the above-described determination CPU 4. And output to the MFM processing CPU 5.
[0007]
The MFM processing CPU 5 has three ratios of MFM signal width ratios of 2: 3: 4. Therefore, all the data is read, and the average ratio of the top eight synchronization bits is “2”. Are extracted, and those with a width ratio of “3” and “4” are selected based on the extracted value (“2”) and converted to “0” and “1”. .
[0008]
The determination CPU 4 controls the entire magnetic data processing apparatus, and cooperates with a higher-level CPU that controls an automatic ticket gate (not shown) to write new data to the tickets. 6 is configured to send a write signal.
[0009]
This write signal is generated so as to be written on the tickets by the method of the signal read via the read head 1. That is, when the determination CPU 4 inputs the NRZ signal from the NRZ signal generation circuit 2, the recording method recorded on the tickets is determined to be the NRZ method, and the determination CPU 4 receives the MFM signal from the MFM processing CPU 5. When input, the recording method recorded in the ticket is determined to be the MFM method, and when the determination CPU 4 determines that it is not the NRZ method or the MFM method but the FM method, it is input from the F2F signal generation circuit 3 When the signal is processed, that is, when the width of the previous bit is 5/7 or more, “0” is generated, “1” is generated when it is shorter, and “1” is generated, A bit is added to calculate the previous bit.
[0010]
FIG. 4 (b) shows a conventional magnetic data processing apparatus incorporated in a ticket vending machine such as an automatic ticket vending machine or an automatic checkout machine. The difference from the above-described example of the automatic ticket gate is that the determination CPU 4 uses the NRZ method. In other words, all methods of the MFM method and the FM method are determined.
[0011]
Therefore, the signal from the read head 1 is formed by a hybrid IC, subjected to signal processing such as amplification in the signal generation circuit 7, and then input to the determination CPU 4 including the F2F signal and the NRZ signal. It is configured as follows.
[0012]
[Problems to be solved by the invention]
However, since the conventional magnetic data processing apparatus discriminates each method by one CPU for determination (main CPU), there is a disadvantage that the load becomes heavy, and the above-described magnetic data processing apparatus has the disadvantage that FIG. As is clear from (b), there is a problem that the processing contents of the CPU differ depending on the type of processing machine in which the magnetic data processing apparatus is incorporated, and cannot be shared.
[0013]
Accordingly, the present invention has been made to solve the above-mentioned drawbacks, and its purpose is to reduce the load for determination and to make the data common to each processor and to prevent reading errors. To provide an apparatus.
[0014]
[Means for Solving the Problems]
In order to achieve the above object, the magnetic data processing apparatus according to the present invention selects whether the recording method of data recorded on the magnetic data recording medium is the FM method, the MFM method, or the NRZ method, and the selected method. In the magnetic data processing apparatus for performing the predetermined arithmetic processing based on the extracted data and recording new data on the magnetic data recording medium according to the selected method, if necessary. It is determined whether the data recorded on the magnetic data recording medium is recorded by the NRZ method, and a main CPU that controls the main body of the magnetic data processing apparatus, and each track recorded on the magnetic data recording medium And whether the data recorded on the magnetic data recording medium is the FM method or the MFM method. It is characterized by having a constant to F2F signal processing CPU.
[0015]
DETAILED DESCRIPTION OF THE INVENTION
Hereinafter, embodiments of the present invention will be described with reference to the drawings. FIG. 1 is a block diagram showing a schematic configuration of a magnetic data processing apparatus according to an embodiment. The same components as those of the conventional apparatus shown in FIG.
[0016]
Although only 1 is shown here, the read head 1 corresponds to a plurality of tracks provided on a magnetic data recording medium (tickets) (not shown). Although not shown, a plurality of head elements having coils corresponding to the plurality of tracks are provided.
[0017]
The signal generation circuit 7 is formed of a hybrid IC in the same manner as the signal generation circuit 7 in FIG. 4B, and after performing signal processing such as amplification, a determination CPU and F2F for NRZ signal analysis It is configured to output to the F2F signal processing CPU 8 for signal processing.
[0018]
A plurality of F2F signal processing CPUs 8 are provided corresponding to the respective head elements of the read head 1, that is, corresponding to the respective tracks provided on the magnetic data recording medium.
[0019]
The determination CPU 4 controls the entire magnetic data processing apparatus, corresponds to the main CPU of the present invention, and comprehensively controls processing machines that process magnetic data recording media (tickets) such as automatic ticket gates. A write signal is sent to the write head 6 for writing new data on the magnetic data recording medium in cooperation with a host CPU (not shown).
[0020]
This write signal is generated so as to be written to the magnetic data recording medium by the method of the signal read through the read head 1, that is, the FM method, the MFM method or the NRZ method.
[0021]
Next, the control operation will be described with reference to the flowchart of FIG. 2 assuming that the magnetic data processing device is incorporated in an automatic ticket gate and the magnetic data recording medium is a boarding ticket.
[0022]
Now, when a ticket is inserted into the automatic ticket gate (Yes in step 100; hereinafter, step is referred to as S), data recorded in each track of the ticket is read via the read head 1. The read signal is output to the determination CPU (main CPU) 4 and the F2F signal processing CPU 8 via the signal generation circuit 7.
[0023]
The determination CPU 4 starts data analysis based on the NRZ method on the assumption that the recording method of the inserted tickets is the NRZ method, that is, each track is not independent (S102a).
[0024]
Simultaneously with the NRZ data analysis of the CPU 4 for determination, that is, in parallel with the NRZ data analysis, the F2F signal processing CPU 8 assumes that the entered tickets are the FM system or the MFM system. Assuming that the tracks are independent, the data for each track is analyzed (S102b).
[0025]
When this F2F signal processing CPU 8 analyzes the data for each track, the external parameter area provided in the F2F signal processing CPU 8 stores unique conditions such as the conveyance speed of the automatic ticket gate (processing machine). . Therefore, accurate data processing can be performed later in accordance with the characteristics of the stored processor (in this case, automatic ticket gate).
[0026]
If it is determined by the analysis of the determination CPU 4 that the clock data is included in the data and the recording method recorded in the ticket is the NRZ method (S104a), the boarding is performed using the program for the NRZ method. Data recorded in the ticket is read, and a predetermined calculation process for ticket gate processing is performed by a controller (CPU) (not shown) that controls the automatic ticket gate in an integrated manner based on the read data. (S106).
[0027]
As a result of a predetermined calculation process for ticket gate processing, when there is data to be newly recorded on the tickets, for example, when entrance data is to be recorded, the data is written in the NRZ method via the determination CPU 4 in the write head. 6 is written in the tickets (S108).
[0028]
The F2F signal processing CPU 8 calculates the recording density of the first few bits, ie, the first few bits (for example, 4 bits, hereinafter described as 4 bits), and the FM method or MFM is calculated from the difference in the recording densities. The recording method is determined (S102b). When the calculated recording density is greater than a predetermined value, the FM system is determined (S104b positive), and when the calculated recording density is lower than the predetermined value, the MFM system is determined (S104b negative, S104c positive).
[0029]
For the determination of “0” and “1” in the F2F signal processing CPU 8, the average of the four previous reference bits is used. The reference bit for the FM method has a width of “0”, and in the case of “1”, two reference bits having a width of “1” are used as the reference bits. Further, the reference bit for the MFM method is set to width 2, and in the case of width 3 and width 4, pseudo width 2 is calculated as the reference bit by setting the width to 2/3 and 1/2, respectively.
[0030]
When the recording method recorded on the ticket is determined to be the FM method or the MFM method, similarly to the above-described determination of the NRZ method, calculation processing is performed according to the program of the determined method. New data is recorded according to the FM method or the MFM method (S106, S108).
[0031]
In the above-described magnetic data processing device, the F2F signal processing CPU processes the data for each track to perform FM signal processing or MFM signal processing, and the determination CPU 4 performs NRZ signal processing. The load on the CPU 4 can be reduced, and it can be shared by different types of processing machines such as an automatic ticket gate and an automatic checkout machine.
[0032]
Further, in the FM method reading in the conventional magnetic data processing apparatus, if there is a change such as that the previous bit becomes long for some reason, “0”, “1” from the next bit width based on the value. ", However, there is a risk of misjudgment. However, as in the present invention, since the average value of a plurality of immediately preceding bits (four in the above example) is used as a reference, misjudgment is reduced be able to.
[0033]
Further, in the MFM method reading in the conventional magnetic data processing apparatus, since “0” and “1” are discriminated after reading all the data, there is an inconvenience that the processing time is inevitably increased. The invention has a feature that processing time can be shortened because processing can be performed in the middle of data reading.
[0034]
In the above example, an example in which the magnetic data processing device is incorporated in an automatic ticket checker is shown. However, instead of this automatic ticket checker, for example, it can be incorporated in an automatic checkout machine, or incorporated in another processor May be included. In addition, although the magnetic data recording medium is a ticket, it goes without saying that it may be a card such as a prepaid card or a stored fair card.
[0035]
【The invention's effect】
A magnetic data processing device according to the present invention determines whether data recorded on a magnetic data recording medium is recorded by an NRZ method, and controls a main CPU for controlling the magnetic data processing device main body, and the magnetic data recording The F2F signal processing CPU is provided corresponding to each track recorded on the medium and determines whether the data recorded on the magnetic data recording medium is the FM system or the MFM system. The load on the CPU can be reduced and can be shared by various processors.
[Brief description of the drawings]
FIG. 1 is a block diagram showing a schematic configuration of a magnetic data processing apparatus according to an embodiment of the present invention.
FIG. 2 is a flowchart showing a control operation.
FIG. 3 is an explanatory diagram showing read waveforms of an FM method, an MFM method, and an NRZ method.
4A is a block diagram showing a schematic configuration of a conventional magnetic data processing device incorporated in an automatic ticket gate, and FIG. 4B is a conventional magnetic data incorporated in an automatic checkout machine or an automatic ticket vending machine. It is a block diagram which shows schematic structure of a processing apparatus.
[Explanation of symbols]
1 Readhead 4 Determination CPU (Main CPU)
6 Write Head 7 Signal Generation Circuit 8 F2F Signal Processing CPU

Claims (1)

Select whether the recording method of the data recorded on the magnetic data recording medium is FM method, MFM method or NRZ method, extract data according to the selected method, and perform predetermined arithmetic processing based on the extracted data In the magnetic data processing apparatus for recording new data on the magnetic data recording medium according to the selected method as necessary,
A main CPU that controls whether the data recorded in the magnetic data recording medium is recorded by the NRZ method, and controls the magnetic data processing device main body;
F2F signal processing CPU provided corresponding to each track recorded on the magnetic data recording medium and determining whether the data recorded on the magnetic data recording medium is the FM system or the MFM system When,
A magnetic data processing apparatus comprising:

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