JPS60111368A - Card decision device of magnetic card reader - Google Patents

Abstract

PURPOSE:To make it possible to decide which standard the magnetic card belongs to by using the record density of the track on the magnetic card. CONSTITUTION:The magnetic card inserted to a card insertion aperture 19 of a card gate part 14, for example, is a common use type card 6 of ISO standards, then, the gap part of two channels A and B of the upper side magnetic head 16 is opposite each other to one track 2 of NTT standards, the gap part of the channel C of a lower side magnetic head 17 is opposed to the 1st track 41 of ISO standards and the gap part of the channel C of a lower side magnetic head 17 is opposed to the 2nd track 42 of ISO standards. The record density of respective tracks of ISO standards magnetic card is different. Therefore, base upon the output signal of a respective channels of two magnetic heads placed as mentioned above, it can be decided by which standard the inserted magnetic card is specified or whether or not the magnetic card is properly inserted.

Description

DETAILED DESCRIPTION OF THE INVENTION The present invention relates to a card discrimination device for a magnetic card reader that discriminates between magnetic cards of different standards.

Magnetic cards based on NTT standards and those based on ISO standards are mainly known. Figure 1 shows an NTT standard magnetic card 1, with a magnetic stripe 2 on the front side.
is formed. This magnetic stripe 2 has one track, and its recording density is 210 BPI (Bit P
er Inch). FIG. 2 shows an ISO standard magnetic card 3, on the back of which a magnetic stripe 4 is formed. This magnetic stripe 4 is provided with three tracks 41 to 43, and each of the tracks 41 to 43 has a different recording density. track 4
The recording density of track 42 is defined as 210 BPI, and the recording density of track 42 is defined as 1l-1 near 5BP■. As shown in Fig. 3, the trunk position of both magnetic cards 1.3 is such that when both magnetic cards 1.3 are stacked, track 41° 42 on magnetic card 1 and track 41° 42 on magnetic card 3 are almost entirely aligned. They are positioned so that they overlap.

Conventional magnetic card readers only use NTT standard magnetic cards 1 and ISO standard magnetic cards 3, and recently, NTT standard magnetic cards 1 are available.
The development of a device that can be used in combination with the magnetic card 3 and the ISO standard magnetic card 3 is underway. Accordingly, it is necessary to distinguish between the two magnetic cards 1 and 3.

Therefore, a two-channel magnetic head 5 is arranged in the card insertion portion of the magnetic card reader as shown in FIG. Magnetic card 1 from the matching part
, 3 is read when the magnetic cards 1 and 3 are inserted, and the magnetic cards 1 and 3 are discriminated by taking the difference between the read outputs of the two channels. In this method, when an NTT standard magnetic card 1 is inserted, the two-channel magnetic head 5 reads information from one track 2, so the difference between the read outputs of the two channels becomes zero, indicating that the inserted magnetic card is NTT standard. It is determined that there is, and 1
When inserting an ISO standard magnetic card 3, the two-channel magnetic node 5 has two tracks 41 with different recording densities.
．． Since the information is read from 42, the difference in the reading output of those two channels is no longer zero, and the inserted magnetic card is
The purpose is to determine that it complies with the SO standard.

However, in this system, if there is a large phase shift in the two-channel read output from the magnetic head 5, the magnetic card discrimination ability will be degraded. Furthermore, if the two windings in the magnetic head 5 are wound in opposite directions to cancel out the reading outputs of the two channels to identify the magnetic card, the output will be obtained even if the NTT standard magnetic card 1 is inserted. Therefore, it is not possible to determine whether an NTT standard magnetic card 1 has been inserted, or whether the magnetic card has been inserted upside down (with the magnetic stripe facing down) by mistake.

The present invention provides a card discriminating device for a magnetic card reader that focuses on the recording density of tracks on a magnetic card to correctly discriminate between magnetic cards of different standards. The purpose is to provide.

The present invention will be described in detail below with reference to the drawings.

The magnetic cards are the aforementioned NTT standard magnetic card 1 and IS.
In addition to the O standard magnetic card 3, there is also an NTT/ISO standard common type magnetic card 6 that has NTT standard and ISO standard magnetic stripes 2 and 4 on both the front and back sides of one card, as shown in Figure 5. be.

In one of the best embodiments of the present invention, the magnetic cards 1, 3
．． 6 can be determined, and this example will be described next.

Main body 13 in a magnetic card reader as shown in FIG.
A card gate section 14 is provided on the front surface of the main body 13, and a circuit section 15 is provided on one side of the main body 13. A card insertion slot 19 is provided in the card gate section 14. As shown in detail in FIGS. 7 and 8, the card gate section 14 has magnetic heads 16 and 17 for card detection above and below the magnetic card passage.
They are placed facing each other across the road. The lower magnetic head 17 is fixed to the gate part 14, whereas the upper magnetic head 16 is provided so as to be movable in the vertical direction, and is pushed from above by the head holding member 18 to the card insertion slot 19. The head holding member 18 allows the magnetic card to be brought into close contact with the magnetic stripe of the inserted magnetic card, and the magnetic card is brought into close contact with the lower magnetic head by the pressing force of the head holding member 18. It has become. A shutter is provided between the card detection magnetic head 16, 17 and the card reader main body 13 to open and close a passage for the magnetic card, but it is not shown in the drawing.

This shutter is connected to, for example, a solenoid that makes a driving noise, and is normally biased by a spring in a direction that blocks the path of the magnetic card, and the shutter is connected to the magnetic head 16 of the magnetic card inserted from the insertion slot 19. ．． ．． When the magnetic card 17 is detected, the solenoid DI moves and the shutter opens, allowing the magnetic card to be inserted further inside than the shutter. The motor starts, and as with conventional magnetic card readers, the magnetic card force is fed into the card by a feed roller and a predetermined operation is performed.

It is assumed that the reading and writing magnetic heads on the side of the magnetic card reader main body 13 are also arranged above and below, sandwiching the path of the magnetic card.

As shown in FIG. 8, the upper magnetic head 16 is formed into two channels, channel A and channel B, and the lower magnetic head 17 is also formed into two channels, channel C and channel D. There is. The gap portion of the channel A of the upper magnetic head 16 is N
When the TT standard magnetic card 1 is inserted correctly, the first track 2 of the ISO standard magnetic card 3 is inserted, and when the ISO standard magnetic card 3 is inserted upside down, the magnetic head 16 faces the first track 41 of the magnetic card 1. If the NTT standard magnetic card 1 is inserted correctly, the gap part of channel B of the
If it is inserted with the front side reversed, its second track 42
They are arranged to face each other. On the other hand, the gap part of channel C of the lower magnetic head 17 is one track 2 when the NTT standard magnetic card 1 is inserted with the front and back reversed, and when the ISO standard magnetic card 3 is inserted correctly. are opposite to the first track 41, respectively, and the gap part of the channel D of the lower magnetic henode 17 is placed in the first track 2 when the NTT standard magnetic card 1 is inserted with the front side reversed. When a standard magnetic card 3 is inserted correctly, it faces the second track 42 respectively. In addition, the inserted magnetic card is a type compatible with NTT standards and ISO standards6.
In this case, the gap portions of the two channels A and B of the upper magnetic head 16 both face the first track 2 of the N T 'J' standard, and the lower magnetic head is connected to the first track 41 of the ISO standard. The camp part of channel C of 17 faces the second track 42 of the 180 standard, and the gap part of channel D of the lower magnetic nod 17 faces the second track 42 of the 180 standard. Here, the upper magnetic head 16 is assumed to be an NTT side detection head, and the lower magnetic head 17 is assumed to be an ISO side detection head. The recording density of each trunk of an ISO standard magnetic card is different from each other, so it is possible to determine what standard the inserted magnetic card is based on the output signals of each channel of the two magnetic heads arranged as described above.
Alternatively, it is possible to determine whether the magnetic card has been inserted correctly.

FIG. 9 shows an example of a circuit section including a card discriminating device that performs such discrimination.

In FIG. 9, A of the NTT side detection head 16.

B2 channel detection (I and ISO side detection head 1
The detection signals of C and B2 channels of 7 are each sent to amplifier 2.
After being amplified in steps 1, 22, 23, and 24, the pulses are shaped into pulses in pulse forming circuits 25 to 28 and input to discrimination circuits 29 and 30. The discrimination circuits 29, 30 each include two stripe detection circuits 31, 32, 33° 34 and a counter 35.
, 36, the stripe detection circuits 31 to 34 detect the presence or absence of the output signals of the pulse forming circuits 25 to 28, respectively, thereby detecting the presence or absence of the output signals of the magnetic heads 16 and 17.
, D, A, and B to detect whether data is being reproduced from the magnetic stripe on the magnetic card. NAND circuit 37.
38 is a stripe detection circuit 31 and 32, and each magnetic head 16 is detected by taking the NAND of the output signals of 33 and 34.
．． It is determined whether at least one channel of 17 is reproducing data from the magnetic stripe. counter 35
, 36 count the output pulses of the pulse forming circuits 25 and 27 and are reset by the output pulses of the pulse forming circuits 26 and 28, so that the magnetic card is
It is determined whether it is a standard or an ISO standard. Here is a magnetic card 1,6 that complies with the NTT standard.
In this case, there is one 210 BPI trunk, and in magnetic cards 3 and 6 that comply with the ISO standard, the first trunk 41 is two.
10 BPI and the second track 42 is 75 BPI.

Therefore, even if the magnetic cards 1 and 6 are inserted normally, the counter 35 receives count signals and cent signals of the same cycle from the pulse forming circuits 25 and 26 alternately, and the count does not exceed 2 and does not generate an output signal. However, if the magnetic cards 3 and 6 are inserted upside down, the pulse forming circuit 2
5. From 26 onwards, a count signal and a cent signal with a longer cycle are input, and when the count number is 2 or more, an output signal is generated. Similarly, the counter 36 produces an output signal when the magnetic cards 3 and 6 are inserted normally, but does not produce an output signal even when the magnetic card 1 is inserted. The control circuit 39 is composed of a microcomputer, etc., and the counter 35
．． ．． 36 output signal SII+S12 and NAND circuit 37
．． Based on the output signal St++ 822 of 38, the magnetic card 1, 3.6 is determined as shown in FIG. Controls the card reader drive circuit 45.

That is, when a magnetic card is inserted from the card insertion slot 19,
The output signals SIL+SI2 of the counters 35 and 36 and the output signals 5211822 of the NAND circuits 37 and 38 are read. Then, whether or not there are outputs from channels A and B of the magnetic head 160 is determined based on the output signal S2+ of the NAND circuit 37, and if there are outputs from channels A and B, the counter 35 determines whether or not these outputs are the same. The judgment is made based on the output signal 811. If the outputs of channels A and H are not the same, it is determined that the magnetic card was not inserted correctly.

If the output of B is the same, channel C of the magnetic head 17
, D is detected by the output signal S of the NAND circuit 38.
Judgment is made from t2. If there are no outputs from channels C and D, it is determined that the inserted magnetic card is NTT standard magnetic card 1, and if there are outputs from channels C and D, the output of the counter 36 determines whether these are the same. Judgment is made based on signal SI2. If the outputs of channels C and D are the same, it is determined that the 1st silver card was not inserted correctly, and if the outputs of channels C and D are not the same, the inserted magnetic card is of the NTT and ISO standard common type. It is determined that the card is a magnetic card 6. On the other hand, channel A.

If there is no output from channel B, it is determined whether or not there is output from channels C and D based on the output signal S2t of the NAND circuit 38;
If there is no output from channels C and D, it is determined that the magnetic card has not been inserted correctly. But channel C
, D, the output signal SI2 of the counter 3G determines whether these are the same or not, and the outputs of channels C and D are determined.
If the outputs of channels C and D are the same, it is determined that the magnetic card was not inserted correctly, and if the outputs of channels C and D are not the same, it is determined that the inserted magnetic card is ISO standard magnetic card 3. judge. If it is determined that the magnetic card has not been inserted correctly, the erroneous insertion display circuit 44 is activated to display the erroneous insertion of the magnetic card, and the inserted magnetic card is an NTT standard magnetic card 1.
, an ISO standard magnetic card 3, or an NTT/ISO standard common type magnetic card 6, the system is notified of the determination result and the solenoid drive circuit 46 is activated to open the shutter 40 and remove the card. Reader drive circuit 45'f: Operates to operate the main body 13. At this time, the main body 13 drives the magnetic card, reads information from the track, and processes it.

FIG. 11 specifically shows the discrimination circuit 29, and FIG. 12 is its timing chart. Note that the discrimination circuit 30 also has the same configuration as the discrimination circuit 29. In FIG. 11, the signal is the output signal of the pulse forming circuit 25, and the symbol ■ is the output signal of the pulse forming circuit 26. In FIG. ■ is a reset signal, which becomes high level (inactive) after the output signals of the magnetic stripe detection circuits 31 and 32 are fixed (after detecting the magnetic stripe and the data being played back).
and returns to a low level by the time the next magnetic card is inserted. The magnetic stripe detection circuits 31, 32 are formed by buffers 47, 48 and charge pump circuits 49, 50, respectively, and the charge pump circuits 49, 50 each have a coupling value of 1. The capacitor is charged each time ■ is input through the buffer 47 and 48, and it detects that a certain amount of pulses have been input and outputs low level output signals E and F to the NAND circuit 37. do. The charge pump circuits 47 and 48 may be replaced by counters that output low level output signals after counting a predetermined number of input pulses. The edges of the input signals ■ and ■ are respectively detected by edge detection circuits consisting of resistors 51 and 52, capacitors 53 and 54, and exclusive OR circuits 55 and 56, and synchronized by the inverted output of the edge signal hD flip 70 and knob 57. 58.59 and is reversed. Is the engineering signal ■e from the gate 58 inverted by the inverter 60? and is counted by the D flip-flop 61. D
The flip-flop 61.57 forms a counter, and the edge signal ■e and reset signal @ from the NAND gate 59 pass through the NAND circuit 62 and reset the D flip-flop 61.57. D flip flop 5
7 is set at the rising edge of the inverted output of the D flip-flop 61, the NAND games 1, 58, and 59 are turned off.

An ISO standard magnetic card 3 is inserted into the card insertion slot 19 upside down.
The first trunks 41 and 75 of the 2108PI on the magnetic card 3 are inserted into channels A and B of the magnetic head 16.
When information is reproduced from the second track 42 of the BPI, the reproduced signals (F2F signals) ■ and ■ have different frequencies, and the reproduced signal ■ has a higher frequency than the reproduced signal ■. Therefore D
By setting the flip-flop 57, it is determined that the magnetic card complies with the ISO standard. Also N
A TT standard magnetic card 1 is inserted into the card insertion slot 19, and the magnetic card 1 is inserted into channels A and B of the magnetic head 16.
If the same information is reproduced from trunk 2 above, the frequencies of the reproduced signals will be the same. Therefore, the D flip-flop 61 simply repeats inversion, the D flip-flop 57 is not set, and it is determined that the magnetic card is of the NTT standard. The output signal of the D flip-flop 57 and the output signal E of the charge pump circuit 49.50
, F are input to the NOR circuit 63 and are input to the exclusive OR circuit 55 .
The edge signal from 56 is input to NOR circuit 64. D
The flip-flop 65 latches the output signal of the Sinoor circuit 63 by the edge signal from the NOR circuit 64, and is reset by receiving the reset signal ◎ or input via the buffer 66.

Therefore, both channels A and B of the magnetic head 16 reproduce information from the tracks on the magnetic card, resulting in the output signal E of the charge pump circuit 49.50.

At the same time that both F levels become low, the magnetic card becomes NTT.
The output of the D flip-flop 57 (i
When the number is low level, the D flip-flop 65 is set and its output signal So becomes high level, and the magnetic card is ISO standard and the output signal So of the D flip flop 70 knob 57 becomes high level. In this case, the D flip-flop 65 is reset.

In the above example, between each reproduction pulse ■ from a track with a low recording density, there is a reproduction pulse ■ from a trunk with a high recording density.
The count number of the counter made up of the D flip-flops 61.57 was set to 2 by paying attention to the fact that at least 2 . The magnetic head 16 is a normal one-channel magnetic head, and the discrimination circuit 2 corresponds to the magnetic head 16.
9 may also be configured with only one stripe detection circuit. Alternatively, only magnetic cards 1.3 of two standards may be discriminated. Furthermore, in the above-mentioned magnetic card league, when either magnetic card 1, 3 or 6 is inserted correctly, the shutter is opened 40 degrees and the magnetic card is taken into the main body, but when a magnetic card is inserted, this is unconditionally If the magnetic card is inserted incorrectly into the main body, the magnetic card driving roller may be reversed to eject the magnetic card. A two-channel magnetic head can also be replaced with two one-channel magnetic heads.

As described above, according to the present invention, there is provided a first standard magnetic card having at least one track of magnetic stripe, and a second standard magnetic card having two tracks of magnetic stripe having different recording densities at positions overlapping the above track. In a magnetic card reader that can be used in common with a magnetic card, a magnetic head device for two channels is provided, in which gap portions are located at positions corresponding to overlapping positions of the tracks of the first standard and the second standard. Differences in recording density are detected from the output signals of the two channels, so even if there is a large phase shift between the output signals of the magnetic head device for two channels, it is possible to follow this and sufficiently distinguish between magnetic cards of different standards. Furthermore, the magnetic card can be identified even if the moving speed of the magnetic card is not constant.

[Brief explanation of drawings]

Figures 1 and 2 show NTT standard magnetic cards and IS
A plan view and a back view of a part of an O standard magnetic card, Figure 3 is a diagram showing the track positional relationship between an NTT standard magnetic card and an ISO standard magnetic card, and Figure 4 is an example of a card discrimination device. 5 is a side view showing a magnetic card compatible with NTT and ISO standards, FIG. 6 is a perspective view showing an example of a magnetic card reader to which the present invention is applied, and FIG. 7 is a side view showing the same magnetic card. FIG. 8 is a front view showing the card gate section of the reader; FIG. 8 is a front view showing the relationship between the magnetic head gap section of the card gate section and the track position on the magnetic card;
FIG. 9 is a block diagram showing a circuit section in the magnetic card reader, FIG. 10 is a block diagram showing a discrimination circuit in the same circuit section, and FIG. 12 is a timing chart of the discrimination circuit. 17...Magnetic head device for 2 channels, 30...
Discrimination circuit.

Claims (1)

[Claims] A first standard magnetic card having at least one track of magnetic stripe and a second standard magnetic card having at least two tracks of magnetic stripe with different recording densities at positions overlapping the track can be shared. A card discriminating device for a magnetic force 7 reader capable of generating magnetic force 7, wherein gap portions are located at positions corresponding to overlapping positions of the tracks of the first standard and the second standard, respectively.
A card discriminating device for a magnetic card reader, comprising magnetic head devices for channels and detection means for detecting a difference in recording density from an output signal of the magnetic head devices.