JPS60202501A - Method for measuring data recording state of magnetic card - Google Patents

Abstract

PURPOSE:To measure the digital data interval by opening and closing a gate circuit according to the time and period decided from the count data preceding by one step. CONSTITUTION:A magnetic card reading/counting device 7 reads the magnetic data recorded on the magnetic stripes 2 on a magnetic card 1 and converts logic ''1'' into logic ''0''. Then the device 7 sets all data at logic ''0'' and counts the data intervals. A processor 11 fetches the count data of the device 7 to a memory 12 and processes the read-out data through a microcomputer 13. While the processor 11 is connected to a CRT display 16 and a keyboard 17. The display 16 displays the arithmetic result of the processor 11, and the keyboard 17 gives the desired data to the processor 11. Thus it is possible to measure accurately the interval of the digital data recorded on the stripes 2 of the card 1 and to detect easily the recording grade of data.

Description

DETAILED DESCRIPTION OF THE INVENTION The present invention relates to a measuring method for measuring the recording state of data recorded on a magnetic stripe in a magnetic card.
Especially recorded on the magnetic stripe ℃-121 logic 10
This invention relates to a method for measuring the data recording state of a magnetic card, which measures the bit length of each logical value after converting it into the original logic.

Recently, systems using magnetic cards are rapidly becoming popular. In this magnetic card, necessary information is recorded on a magnetic stripe as a digital signal. Most of the recording methods are based on the JIS-B9561 standard, and according to that standard, the recording interval of digital signals is 8.2
68 [b t t/wl±4C%1 is specified.

Although necessary information is recorded on the magnetic canid based on such standards, there has been no method to measure whether or not the recording is being performed normally.

The present invention has been made in view of the above-mentioned points, and reads out digital data recorded on the magnetic stripe of a magnetic card as logic @1", @o", and converts the logical value of the data into one of the logical values. This method provides a method for measuring the data recording state of a magnetic card that can accurately measure the recording state of digital data by measuring the bit length of the converted logical value and outputting a constant result. It is.

Embodiments of the present invention will be described below based on the drawings.

FIGS. 1 (CI) and (II) are a plan view and an explanatory diagram of a magnetic stripe of a magnetic card, which is an object to be measured by the method for measuring the data recording state of a magnetic card according to the present invention.

In FIG. 1 (I), the reference numeral 1 is a magnetic card, and the magnetic card 1 is provided with a magnetic stripe 2. In addition, for example, a credit company name 3, a symbol 4 assigned to an individual, and an individual name 5 are provided. , expiration date 6, etc. are recorded.

The magnetic stripe 2 has ! As shown in FIG. 1 (I[), necessary information is recorded as digital data of logic "0" and 111. Here, the direction of the arrow indicates the magnetic polarity. Further, as described above, most of the recording methods are based on the JIS-B9561 standard.

According to the above standard, each data interval is approximately 0.12 [snow], and this value is ±5 [μm3].
Errors within the range are allowed.

A measurement method for measuring the data interval of the magnetic stripe 2 will be described below.

FIG. 2 is an overall configuration diagram showing a measuring device capable of implementing an embodiment of the method for measuring the data recording state of a magnetic card according to the present invention.

In FIG. 2, reference numeral 7 denotes a magnetic card reading and counting device, which reads magnetic data recorded on the magnetic stripe 2 of the magnetic card 1, and the logic 11 of the read digital data. ”, converts the logical “1” of “0” to logical “0”, and converts all data to logical “
0'', and the data interval can be counted.

This magnetic card reading/counting device 7 is connected to a processing device 11 via a connector 8° cable 9 and a connector 10.

The processing device 11 imports the counting data from the magnetic card reading/counting device fIt7 into the memory 12, and after completing importing all the counting data into the memory 12, the data read out from the memory 12 can be processed by the microcomputer 13 and output. It has become. The processing device 11 has a connector 14. Cathode ray tube (cRT) display 1 via cable 15
6, and a keyboard 17. The CRT display 16 displays the calculation results of the processing device [11], and the keyboard 17 provides necessary data to the processing device 11.

FIG. 3 is a block diagram showing the configuration of the measuring device.

The magnetic card reading/counting device 7 is configured as follows. That is, digital data on the magnetic stripe 2 of the magnetic card 1 can be read by the magnetic head 18, converted into an electrical signal, and supplied to the amplifier circuit 19. The amplifier circuit 19 is connected to a waveform shaping circuit 21 via a differentiating circuit 20.

The waveform shaping circuit 21 is connected to a counting circuit 22. The counting circuit 22 includes a gate circuit 23 connected to the waveform shaping circuit 21 and a counter 2 connected to the gate circuit 23.
4, a gate circuit 23, a counter 24, and a control circuit 25 are connected to a connector 8.

The processing device 11 includes an input/output board 26, a microcomputer 13, a memory 12, and an input/output board 27 for external input/output devices.

FIG. 4 is a circuit diagram showing the detailed configuration of the counting circuit 22.

One input terminal of the gate circuit 23 is connected to the waveform shaping circuit 21, and the other input terminal is connected to the OR circuit 30. The output terminal of the gate circuit 23 is connected to the counter 24
The monostable multivibrator 31 is connected to the monostable multivibrator 31 . The output terminal of the multivibrator 31 is connected to a start terminal 8T of the program counter 33 and a preset terminal P of the program counter 34 via a differentiating circuit 32.
It is connected to R. The output terminal OT of the program counter 33 is connected to the start terminal ST of the program counter 34 and one input terminal of a 7-lip-flop 36 via an OR circuit 35.

Go 1-1 is 97-+h So JQA's output rod 0-71
The other input terminal of the one-tube flop 36 and the OR circuit 50
It is connected to the reset terminal of the counter 24 via. One output terminal Q of the flip 70 tube 36 is connected to one input terminal of the OR circuit 30. A data input terminal of the program counter 33 is connected to an output terminal of the counter 24. The output terminal of the counter 24 is
They are connected to data input terminals of program counters 34 and 39 via setters 37 and 38, respectively.

The output terminal of the gate circuit 23 is connected to one input terminal of the AND circuit 40 and the input terminal of the delay circuit 41, and the output terminal of the AND circuit 40 is connected to the preset input terminal PR of the program counters 33 and 39, respectively. has been done. The output terminal of the delay circuit 41 is the inverting circuit 42
It is connected to the clock input terminal of the flip-flop 43 via. One output terminal Q of the flip-flop 43 is connected to one input terminal R of the flip-flop 44, and the other output terminal 1 is connected to the input terminal of the OR circuit 51. One output terminal Q of the flip-flop 44 is connected to the other input terminal of the AND circuit 45 and also to the input terminal of the AND circuit 40 via an OR circuit 51. One input terminal of the AND circuit 45 is connected to the output terminals of the flip-flop 36, and the output terminals of the AND circuit 45 are connected to the start terminal ST of the program counter 39 and one input terminal of the AND circuit 46, respectively. The output terminal Q of the flip-flop 44 is connected to the other input terminal of the OR circuit 30. The output terminal of the program counter 39 is an AND circuit 46
through the input terminal of the OR circuit 35 and the 7 lip-flop 4
It is connected to one input terminal of 9. The output terminal page of the flip 70 tube 49 is connected to the input terminal of the AND circuit 40.

The initial reset signal IR is the flip 7 quadruple 43.
49, the input terminal of the OR circuit 50, the input terminal S of the block 7 and the block 44 via the inverting circuit 47, and the reset terminal of the flip-flop 36 via the inverting circuit 48. It has become so.

In addition, 50 is a signal transfer signal, 51 is a count signal, 52 is a reset signal, and 53 is an abnormal signal. 54 is a clock signal, 55 is a gate opening time setting signal, and 56 is a delay time compensation setting signal for the delay circuit 31. Therefore, the setting signal 55 is used as a signal for opening the gate circuit 23 for a time corresponding to the digital data error C±5 μm).

The operation of the measuring device configured as described above will be explained with reference to the time chart shown in FIG.

First, the flip-flops 36, 43, 44.degree. 49, counter 24, and other circuits are initialized by an initial reset signal IR generated when the device is powered on or a reset button is pressed.

Then, the output terminal Q of the flip-flop 44 becomes "1".
This opens the gate circuit 23. Here, when the magnetic card 1 is read, an electrical signal is obtained from the magnetic stripe 2 (St) via the magnetic head 18, and when this is amplified by the amplifier circuit 19, a signal Sa is obtained. This signal Sa is input to a differentiating circuit 20, differentiated, and output as a differentiated signal sb. The differential signal sb is input to the waveform shaping circuit 21, where the waveform is shaped and output as a signal 8c.

When the first signal Sc passes through the gate circuit 23, this signal 8e drives the monostable multivibrator 31 and inverts the flip-flop 43 via the delay circuit 419 and inversion circuit 43.

However, since the flip-flop 44 operates with a falling pulse, the gate circuit 23 continues to be opened. In the meantime, the monostable multivibrator 31 operates the counter 24 after a certain period of time T has elapsed. The counter 24 continues counting until the second signal 5c (Se) is input, and when it stops, the count value 1cl is stepped (Sh). Since the signal Sc also serves as a read command signal 50° to the processing device 11, at this point the processing device 11 takes in the count value tcl into the memory 12 via the input/output port 26° and the microcomputer 13. Note that the counter 24 resets the first count value tc1 just before the time T elapses in response to a command from the processed value ff1ill.

When the second signal Sc passes through the gate circuit 23, the signal Se drives the monostable multivibrator 31 and also passes through the OR circuit 51. The signal from the flip-flop 49 passes through the open AND circuit 40 and presets the data ("(2tC1) to ll*) supplied to the data input terminal of the program counter 33. .44 is inverted.Here, tcl set in the program counter 33 is tcl
2tα set in the same counter 39.
t (=trt) is set to be shorter than tcl by a predetermined time.

Further, the gate circuit 23 will not be opened by the flip-flop 44 from now on. When the monostable multivibrator 31 is reversed after the time T has elapsed, the set value (tβ1) of the setter 37 is set in the program counter 34, and the counter 24 starts counting, and the program counter 33 is set in the differentiating circuit 32. Counting starts with a signal from (Sg).

When the program counter 33 counts the time tα1, it outputs a signal from its output terminal OT and stops counting. This output signal activates the program counter 34 via the OR circuit 35 to start counting, and also inverts the flip-flop 36. The gate 23 is opened by the output of the flip-flop 36. Then, the program counter 34 registers the time tn1 (=Kx tex'
), a signal is output from the output terminal OT to stop counting. Then, flip-flop 3
6 is inverted and closes the gate circuit 23. Gate circuit 23
When the signal Sc is released for the third time, the signal Se is obtained, so the counter 24 has the count value fc.
You can get 2. This is read into the processed value M11 by the command 50.

By the third signal Se, the program counter 33.3
9 has a count value tc2 (=tα2) r Kxtc
2 (=trz) is preset, and the monostable multivibrator 31 is driven. Monostable multivibrator 3
1 is reversed after a certain period of time T, so the counter 24. The program counter 33 starts counting, and at the same time, the data 1*cz (
= "β2) is set. When the program counter 33 reaches time t(z4), a signal is output from its output terminal OT to start the program counter 34 and invert the flip-flop 36. The output terminal Q becomes 112, opening the gate circuit 23. However, the program counter 34 becomes 112 at time t/
3, such a signal is output from its output terminal OT, inverting the flip-flop 36 again, and setting the output terminal Q of the 7-channel flip-flop 36 to lIO''. This causes the gate circuit 23 to close (Td). .

In this way, this device sets the timing and period for opening the gate circuit 23 based on the previous count value counted by the counter 24, and after the set predetermined time has elapsed, the gate circuit 23 is opened for the set fixed period. It was designed to do so. Note that the counter 33 is always activated by the signal Se.

On the other hand, if the signal Sc is not present during the period tβ6, the signal Se will not be obtained either. Such a state is an abnormal state. This abnormal state will be explained below.

The program counter 33 receives the signal Se obtained during the period tβ5.
The program counter 34 is activated by K, and the program counter 34 is thereby set to data tβ6 based on the previous count value. Therefore, the counter 33 has a count value tα
6, starting the counter 34 and inverting the flip-flop 36. The counter 34 inverts the flip-flop 36 again when its count value reaches tβ6. During this period tβ6, the output terminal Q of the 7-lip flop 36 is ``1'', so the gate circuit 23
is open. If the signal Sc is not present during this period tβ6, the signal Se cannot be obtained. Then, since the output signal from the counter 33 is not obtained and the flip-flop 36 is not inverted, the counter 39 continues counting, and when the count value reaches tr6, a signal is output from its output terminal OT. This signal passes through AND circuit 46 to start counter 34, invert seven lip-flop 49, and close AND circuit 40.

When the count value reaches tβ6, the counter 34 outputs a signal from the output terminal OT, and the flip-flop 36
is inverted and the gate circuit 23 is closed.

If the signal Se is obtained during this period tl/96, the counter 33 operates, and when the count value reaches t'ct6, 1αa = the(tea is set, so
The flip-flop 36 is inverted to open the gate circuit 23. Next, the count value of the counter 34 becomes t'/6(
=1β6), the 7 lip-flop 36 is inverted again and the gate circuit 23 is closed.

In this way, when an abnormality occurs, the gate circuit 23 is opened and closed at the same timing and period based on the data immediately before the abnormality occurs until it returns to normal. However, when things return to normal,
After the counter 24 completes counting once, the counters 33, 34, and 39 are set based on this count value. In addition, tα is a position determined based on the interval of the previous digital data (for example, 0.12 (:sm:]
)&c can be considered as the time corresponding to "β is the error c±5cμm with respect to the position").

In this way, according to this device, the signal ``l'' is converted to @0'' by opening and closing the gate circuit 23 at the timing and period determined based on the previous count data, and the data interval is can be measured.

Note that the determined time and period are based on the previous data counted by the counter 24.

In short, this embodiment converts the digital data of logical "0" and "1" recorded on the magnetic stripe of a magnetic card into one logical signal, that is, converts "1" to "0". This method measures each data interval.

As described above, according to the present invention, the interval between digital data recorded on the magnetic stripe of a magnetic card can be accurately measured, and the recording quality of the digital data recorded on the magnetic stripe can be easily detected. There is an effect that can be done.

[Brief explanation of the drawing]

1 (I) and (If) are explanatory diagrams of plane colors and magnetic stripes showing a magnetic card to be measured by the method for measuring the data recording state of a magnetic card according to the present invention, and FIG. 2 is an explanatory diagram of the magnetic stripe according to the present invention. FIG. 3 is a block diagram showing the measuring device, FIG. 4 is a circuit diagram showing an example of the detailed configuration of the counting circuit, and FIG. 5 is the same. 3 is a flowchart shown to explain the operation of the device. 1...Magnetic card, 2...Magnetic stripe, 7...
・Magnetic card reading and counting device, 11-...processing device, 12
...Memory, 13...Microcomputer, 16
...CRT display, 17...keyboard,
18...Magnetic head, 19...Amplification circuit, 2o.
... (differentiation circuit, 21... waveform shaping circuit, 22.
...Counting circuit, 23...Gate circuit, 24...
Counter, 25...control circuit. Patent applicant Computer Service Co., Ltd. Representative Patent Attorney Tsuneaki Hibi Figure 1

Claims (1)

[Claims] (1) Magnetic technology characterized by reading out digital data recorded on the magnetic stripe of a magnetic card, converting the logical value of the read data into one of the logical values, and measuring the data interval between the logical values. How to measure the data recording status of a card. (2. In claim 1, by determining the next data position based on the previous data interval and obtaining digital data within the error interval before and after that position,
A method for measuring the data recording state of a magnetic card, comprising converting a logical value of read data into one logical value.