JP2908535B2 - Signal reading method of magnetic recording type ticket - Google Patents

Description

Description: BACKGROUND OF THE INVENTION 1. Field of the Invention The present invention relates to a method for interpreting a signal of a magnetic recording type ticket piece represented by a magnetic card used for a prepaid card or the like.

[Conventional technology]

Heretofore, a magnetic barcode type magnetic card has been known as a representative example of this type of ticket. This magnetic barcode divides a magnetic recording area composed of a magnetic coating film into small units, and determines whether or not each division unit has a magnetic signal.
It is designed to record the required information according to the arrangement of 0s.

[Problems to be solved by the invention]

However, in the magnetic barcode method as described above, since the entire magnetic recording area has a constant coercive force, signals can be easily read by a simple magnetometer such as a magnet viewer. However, when the card is stolen or lost, there is a drawback that the secret information is decrypted and misused, or the signal is easily falsified.

The present invention has been made in view of the above circumstances, and therefore, a signal of a highly reliable magnetic recording type ticket piece that cannot read a recorded signal with a simple magnetic measuring instrument and can adopt various recording formats that make decoding difficult. It aims to provide a method of interpretation.

[Means for solving the problem]

The present inventors have conducted intensive studies to achieve the above object, and as a result, if a recording signal is read based on a difference in coercive force instead of the presence or absence of a magnetic signal as in the related art, it is easy to read the recorded signal. The present inventors have found that it is possible to prevent the reading of a signal by a simple magnetic measuring instrument and to make it difficult to decode information by setting various arrangement patterns of regions having different coercive forces.

That is, the present invention reads a signal recorded in the above-mentioned area of a magnetic recording type ticket piece in which three or more types of magnetic recording areas having different coercive forces are formed in a fixed array on at least one side of a card base. The present invention relates to a method of reading a signal of a magnetic recording type ticket, wherein the read signal is rearranged in a certain order according to the coercive force of each area and read as correct information.

(Operation)

In the ticket piece of the present invention, since three or more types of magnetic recording areas having different coercive forces are provided as described above, a difference in coercive force between these areas can be used as a signal for determining authenticity. For example, with a simple magnetic measurement tool such as a magnet viewer, even if each of the above areas is scanned, it is only determined that there is a "magnetic signal". It cannot be read unless a special device such as a magnet viewer is used. Therefore, the ticket piece is very effective in preventing the destruction of the recorded information and the falsification of the signal by malicious intent, and has high security.

In order to form the magnetic recording areas having different coercive forces, a magnetic paint using magnetic powders having different coercive forces is applied to a predetermined position and area on the card base and dried to form a magnetic coating film. do it. As the magnetic powders described above, those having various coercive forces at the current technical level can be easily obtained as conventionally used widely as magnetic recording elements of magnetic recording media such as magnetic tapes and magnetic disks. However, the selection of such a magnetic powder, the preparation of a magnetic paint, the formation of a magnetic coating film, and the like require a high degree of expertise and equipment, and therefore, it is generally not easy to copy the card base itself.

In the magnetic recording type ticket of the present invention, three or more types of magnetic recording areas having different coercive forces are provided, but it is not necessary that all areas have different coercive forces. That is, n
K regions (n> k ≧ 3) of the three regions have different coercive forces, and the remaining nk regions have the same coercive force as any of the former regions. Good. Various information can be magnetically recorded in each magnetic recording area by means similar to the conventional one, and the recorded information can be erased by degaussing.

The arrangement of the magnetic recording area on the card substrate as described above may be such that a plurality of areas are arranged along the running direction of the ticket in the writing / reading device (reader / writer), or the magnetic recording area may be perpendicular to the running direction. May be arranged in any direction. Also, a non-arranged arrangement may be used. In such an arrangement pattern or arrangement of regions having different coercive forces, the permutation pattern itself can be used as a signal.

Further, as a usage form of the ticket piece, one of the m areas (l <m) is demagnetized in advance, and after the use is completed or during the use, all the m areas are demagnetized. Can be set to disable reuse. Further, the coupons are arranged in a certain order with regions having different coercivity, for example, coercivity.
The magnetic information read from the ticket pieces in which the areas of A, B, C are arranged in the order of ABACBC, the order different from the above arrangement, for example, AABBCC
By rearranging in the order, the information can be set so that it can be read as correct information, and the security can be further enhanced.

〔Example〕

Hereinafter, embodiments of the present invention will be described with reference to the drawings.

FIG. 1 shows a magnetic card A of the first embodiment. In this magnetic card A, three square magnetic recording areas 2, 3, and 4 are arranged in a dispersed manner on one surface of a substantially rectangular card base 1. The coercive force of each region is set to 300 Elsted for the region 2, 650 Elsted for the region 3, and 1,200 Elsted for the region 4.

In such a magnetic card A, the arrangement pattern of the areas 2 to 4 on the card base 1 can also be used as a signal. Therefore, as the reading device, one in which the coercive force measuring head and the magnetic signal reading head are arranged in accordance with the above arrangement pattern is used.

FIG. 2 shows a magnetic card B of the second embodiment. In this magnetic card B, six magnetic recording areas 5 to 10 each having a square shape are arranged on one side of the same card base 1 along the running direction at the time of reading indicated by an arrow, as described above, on one side. The entire card surface other than these areas also forms the magnetic recording area 11. The coercive force of each region is 30 in regions 5 and 9.
0 oersted, area 7 is 650 oersted, area 6 is 1,
200 oersted, areas 8 and 10 are set to 1,750 oersted, and area 11 is set to 2,750 oersted.

In the magnetic card B, the permutations of the areas 5 to 10 can be used as signals, and the read signals are rearranged in a different order from the areas 5 to 10 to improve the security so that correct information can be decoded. Is also possible.

The number, shape, size, arrangement pattern, set coercivity, shape of the card base, etc. of the magnetic recording area of the magnetic recording type ticket piece of the present invention can be variously changed in addition to the examples.

[Effects of the Invention] According to the present invention, three or more types of magnetic recording regions having different coercive forces are provided, and a difference in coercive force between these regions can be used as a signal for authenticity determination. Since it is difficult to read a signal and it is difficult to copy the signal, the arrangement pattern of the magnetic recording area itself can be used as a signal, and a signal reading method for a magnetic recording type ticket such as a magnetic card with high security can be provided.

[Brief description of the drawings]

FIG. 1 is a plan view of a magnetic card according to a first embodiment of the present invention,
FIG. 2 is a plan view of a magnetic card according to a second embodiment of the present invention. A, B: magnetic card, 1: card base, 2 to 11: magnetic recording area

──────────────────────────────────────────────────続 き Continued on the front page (58) Field surveyed (Int.Cl. ⁶ , DB name) G11B 5/80 B42D 15/10 G11B 5/02

Claims (1)

(57) [Claims] 1. A signal recorded in the above-mentioned area of a magnetic recording-type ticket having three or more types of magnetic recording areas having different coercive forces formed in a fixed array on at least one surface of a card base; A signal reading method for a magnetic recording type ticket, wherein the read signals are rearranged in a predetermined order according to the coercive force of each area and read as correct information.