JP3378065B2 - Magnetic barcode position inspection machine - Google Patents

Description

Detailed Description of the Invention

[0001]

BACKGROUND OF THE INVENTION 1. Field of the Invention The present invention relates to a magnetic bar code position inspecting machine printed on the surface of a card.

[0002]

2. Description of the Related Art Conventionally, when inspecting whether the position of a magnetic bar code provided on the surface of a card by printing or the like is printed at a predetermined position, it is visually inspected while magnifying with a magnifying glass. Or, the inspection is performed by an optical method using a CCD camera.

[0003]

However, in the former case, since the operator visually inspects, eye fatigue of the operator due to long-term work or an inspection error due to eye fatigue often occurs. There is. Further, in the latter case, there is a drawback that the inspection device becomes expensive.

An object of the present invention is to provide an inexpensive magnetic bar code position inspection machine which does not rely on the visual inspection of an operator and which eliminates the disadvantage that the current inspection apparatus is expensive. There is.

[0005]

SUMMARY OF THE INVENTION To achieve this object, a magnetic bar code position inspecting apparatus according to the present invention is constructed so that it comes into contact with a part of both ends of a magnetic bar code provided on the surface of a card by printing or the like. Two magnetic heads are attached to the left and right sides, and means for amplifying each output from the magnetic head and means for comparing the amplified outputs with an arbitrary reference level to generate a pulse have two circuits. When a pulse is generated from the two circuits, the magnetic bar code position is printed at a predetermined position of the magnetic bar code, and the magnetic bar code position inspection machine determines that it is acceptable.

That is, according to the present invention, two magnetic heads are attached to the left and right so as to contact a part of both ends of the magnetic bar code printed on the surface of the card. An inspection machine is obtained.

According to the present invention, there are respectively provided two circuits of means for amplifying the output of the magnetic head and means for comparing the amplified output with an arbitrary reference level to generate a pulse. If the above occurs, the bar code position is printed at a predetermined position, and the magnetic bar code position inspecting machine described above is obtained, which is characterized by determining that it is acceptable.

[0008]

According to the present invention, the means for amplifying the output from the magnetic head generated when the card on which the magnetized magnetic bar code is printed passes through the magnetic head and the amplified output at an arbitrary reference level. There are two circuits each for comparing and generating a pulse, and only when a pulse is generated from the two circuits, the position of the magnetic bar code is printed at a predetermined position, and it is automatically determined that it is a pass. To do. Therefore, it is possible to provide an inexpensive magnetic bar code position inspection machine that does not rely on the visual inspection of the operator and is capable of high speed inspection.

[0009]

Embodiments of the present invention will now be described in detail with reference to the drawings.

FIG. 1 shows a sketch for explaining the mounting positions of a magnetic bar code printed on a magnetic card and a magnetic head. In the figure, reference numerals 1 and 2 denote magnetic heads, and a magnetic bar code 3 is printed on a magnetic card 4. Further, the distance X between the magnetic head 1 and the magnetic head 2 in contact with the magnetic bar code 3 can be arbitrarily changed. In FIG. 1, four magnetic bar codes 3 are printed on the magnetic card 4.

FIG. 2 shows a block diagram of the inspection circuit portion of the present invention, which is composed of magnetic heads 1 and 2, amplification circuits 5 and 8, comparison circuits 6 and 9, and an AND circuit 7.

FIGS. 3 and 4 show output waveforms at various parts of the inspection circuit block diagram. FIG. 3 shows the magnetic bar code 3 printed at a predetermined position on the magnetic card 4, and FIG. 4 shows the magnetic bar code. 3 shows output waveforms at various parts when the magnetic card 4 is displaced from a predetermined position.

In FIG. 3, the magnetic head output (a) obtained by amplifying the outputs generated in the magnetic heads 1 and 2 as the magnetic card 4 passes over the magnetic heads 1 and 2 by the amplifier circuits 5 and 8 is compared with the comparison circuit 6 , 9 and when the magnetic head output (a) is above an arbitrary output level, the comparison circuit output (b) is generated. The pulse signal of the comparison circuit output (b) from the comparison circuits 6 and 9 is further input to the AND circuit 7,
When the AND circuit output (c) is generated, the print state of the magnetic barcode is determined to be acceptable.

FIG. 4 shows each part of the inspection circuit when the defective magnetic card 4 whose position of the magnetic bar code 3 shown in FIG. 1 is not within the dimensional tolerance of the predetermined position of the magnetic card 4 is conveyed. It is an output waveform. Even if the magnetic card 4 passes over the magnetic head, if the magnetic barcode 3 is not in contact with one of the magnetic heads 1 and 2, the magnetic head output (d ) Does not occur. Therefore, the comparison circuit output (e) is not generated in the comparison circuit 6 or 9 which does not generate the head output (d).

At this time, the magnetic bar code 3 is replaced by the magnetic head 1.
Or 2 in contact with the magnetic head 1 or 2
As described above, the output of the magnetic head is generated by the amplifier circuit 5 or 8 as shown in FIG. 3A, and the comparator circuit 6 or 9 also generates the comparison circuit output (b). Thus, when the output from the comparison circuit is input to only one input of the AND circuit 7, the AND circuit 7 does not generate a pulse signal like the AND circuit output (f). When no pulse signal is generated in this manner, it can be determined that the magnetic bar code 3 is printed improperly.

[0016]

As described above, according to the present invention,
Two magnetic heads are attached to the left and right ends of the magnetic bar code 3, and there are two circuits for amplifying and comparing the outputs of the respective magnetic heads, and the amplified outputs are compared at an arbitrary level,
When a pulse is generated in the AND circuit 7, it is possible to easily determine that the magnetic bar code is printed at a predetermined position, so that it is possible to provide an inexpensive magnetic bar code position inspection machine that can perform high speed inspection. It was

[Brief description of drawings]

FIG. 1 is a schematic diagram for explaining an embodiment of the present invention.

FIG. 2 is a block diagram of an inspection circuit unit according to the present invention.

FIG. 3 is an output waveform diagram in each part of the inspection circuit block diagram when the position of the magnetic barcode is acceptable. FIG. 3A is a diagram showing an output waveform of the magnetic head output of the amplifier circuit. FIG. 3B is a diagram showing an output waveform of the comparison circuit output. Figure 3 (c) is AND
The figure which shows the output waveform of a circuit output.

FIG. 4 is an output waveform diagram in each part of the inspection circuit block diagram when the position of the magnetic barcode is defective. FIG. 4D is a diagram showing an output waveform of the magnetic head output of the amplifier circuit. FIG. 4E is a diagram showing an output waveform of the comparison circuit output. 4 (f) is AND
The figure which shows the output waveform of a circuit output.

[Explanation of symbols]

1, 2 magnetic head 3 magnetic barcode 4 magnetic cards 5,8 amplifier circuit 6,9 Comparison circuit 7 AND circuit

Claims (2)

(57) [Claims] 1. In a magnetic bar code position inspection machine,
A magnetic bar code position inspecting device, wherein two magnetic heads are attached to the left and right so as to contact a part of both ends of a magnetic bar code printed on the surface of a card. 2. A circuit comprising two circuits each of which has a circuit for amplifying the output of the magnetic head and a circuit for comparing the amplified output with an arbitrary reference level to generate a pulse, and the pulse is generated from the two circuits. The magnetic bar code position inspection machine according to claim 1, wherein the bar code position is printed at a predetermined position and it is determined that the bar code position is acceptable.