JPH0452996B2 - - Google Patents

Description

DETAILED DESCRIPTION OF THE INVENTION [Field of Industrial Application] The present invention relates to a banknote identification method suitable for use in a banknote validator that handles a plurality of banknotes.

[Prior Art] Conventionally, a well-known method for identifying banknotes using a banknote validating machine is to generate signal detection zones at regular intervals using reference pulses corresponding to the conveyance speed of the banknote, etc. There is. However, when handling multiple banknotes, or when adopting a common detection zone division as described above even though the printed patterns to be detected differ depending on the insertion direction, for example, as illustrated in FIG. In the case where the printed patterns 1A and 1B are different depending on the insertion direction of one type of banknote (here, it is assumed that the flower pattern part 1A and the human image part 1B contain magnetic components)
When the banknote 1 to be recognized is inserted into the banknote validator from the direction shown by arrow A, the zone division is A1 to A.
Similarly, when the banknote is inserted into the bill validating machine from the direction indicated by arrow B, the zone division becomes B1 to B9. Now, as the banknote 1 is shown in FIG.
In the conventional case where the detection zone is divided into the same shape both when the bill is inserted in the direction of arrow B and when it is inserted in the direction of arrow B, there is no particular problem when the bill is inserted from the direction of arrow A. B
When inserted from this direction, the human image portion 1B is separated into zones B2 to B4, and the flower pattern portion 1A is further separated into two zones B7 and B8. As a result, the number of detection pulses per zone decreases, making it difficult to distinguish them from noise pulses caused by dirt or the like that are not related to the printed pattern, resulting in a decline in identification performance.

[Problems to be Solved by the Invention] As described above, in the conventional method, the characteristic elements of the banknote 1 may be detected across two adjacent zones, and for example, the signal pulse due to the magnetic component contained in the pigment When counting
Since the number of signal pulses is divided into each zone, the number of signal pulses is halved compared to the case where the whole is detected as one zone, so there is no margin for distinguishing the presence or absence of characteristic elements, and disturbance signals due to dirt etc. This method has the disadvantage that it makes it difficult to identify characteristic elements, such as making it impossible to distinguish between them.

Therefore, in view of the above-mentioned points, the present invention transports the inserted banknote in the insertion direction, scans the banknote in the transport direction with a sensor during the transport, and divides the banknote into zones sequentially in the transport direction from the leading end of the banknote. In the banknote identification method, the banknote identification method detects the output data of the sensor for each zone, and compares the sensor output data for each zone with a predetermined reference value to identify the banknote. Even if the position of the characteristic element to be detected differs depending on the type of banknote to be identified and the insertion direction, reliable identification can be performed by detecting the data of the characteristic element to be detected within one zone. It is an object of the present invention to provide a banknote identification method as described above.

[Means for Solving the Problems] In order to achieve the above-mentioned object, the present invention divides a predetermined number of zones on the front end side of a banknote into zones common to the type of banknote to be identified and the insertion direction, and divides the zones into zones. The first sensor output data is detected every
a second step in which the sensor output data is compared with predetermined data to classify the inserted banknotes according to type and direction of insertion; The present invention is characterized by comprising a third step of dividing the banknote into zones such that the characteristic elements to be detected of the type and insertion direction of the banknote corresponding to the banknote are included in one zone, and detecting sensor output data for each zone.

[Function] In the present invention, the characteristic elements to be detected are the parts where the optimum data for banknote identification can be obtained, and there are no printed designs or the like as such characteristic elements at the edges of the banknotes. This method focuses on the fact that rough identification data can be obtained even at such an end, and in the first step, data on this end is detected on the tip side, and in the second step, this data is used to identify the inserted end. To classify banknotes according to the type of banknote to be identified and the insertion direction.

In the third step, the banknotes of this classification are divided into zones so that the characteristic elements to be detected fall within one zone, so if the inserted banknote matches the classification, it will not be detected. Data of power feature elements are detected within one zone.

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

FIG. 1 shows an example of the configuration of a banknote validating machine that implements the banknote validating method of the present invention.

FIG. 3 is a flowchart showing an embodiment of the control procedure in the banknote identification method of the present invention.

In the following, an example will be described in which the printed pattern of one type of banknote differs depending on the insertion direction, as shown in FIG. 2 described above. For simplicity, it is assumed that the bill validator has one magnetic sensor 2 disposed in the center of the bill as shown in FIG.
A case where insertion from two directions with the surface facing upward is allowed will be explained.

In Figure 1, 1 is the banknote shown in Figure 2, 2
3 is a pulsing circuit that amplifies the output of the magnetic sensor 2 and converts it into a pulse; 4 is a control circuit for the banknote validator; 5 is a control circuit for the banknote 1; The position detection sensor 6 is a clock generation circuit that generates a timing clock proportional to the moving speed of the banknote 1.

Here, the control circuit 4 changes the zone division according to the control procedure shown in FIG. First, step S1
Now let's start banknote identification. That is, for the two zones after the position detection sensor 5 detects the leading edge of the bill, the output of the pulsing circuit 3 for the two zones follows the same predetermined zone division method regardless of the insertion direction shown by arrows A and B. Perform counting (step
S2). At this time, if the banknote 1 is inserted in the direction of arrow A, zones A1 and A in FIG.
The detection zone is divided as shown in 2. Here, since there is no printed pattern in zones A1 and A2, the number of detected pulses is almost zero. On the other hand, banknote 1
is inserted from direction B, zone B1,
It will be divided into zones like B2, and in zone B1 the number of detected pulses is almost zero,
Regarding zone B2, a considerable number of detected pulses are counted depending on a part of the human image.

In the next step S3, in such a case, that is, if the pulse count result of the second detection zone is larger than a predetermined value determined experimentally, it is determined that the pulse has been inserted from the direction of arrow B, and on the other hand, If it is smaller than a predetermined value, it is determined that the insertion was made from the direction of arrow A.

If it is determined to be in the direction of arrow A, step
Proceeding to step S4, the third zone and subsequent zones are divided into zones like zones A3 to A9 in FIG. Zone B3' in Figure 2
-B9' to perform zone division.
According to this, each printed pattern corresponds to the zone division, and the above-mentioned drawbacks can be avoided.

Above, we have explained the case where the zone division is changed depending on the insertion direction of the same banknote.
When identifying multiple types of banknotes, the leading end of the inserted banknote is divided into a predetermined number of zones common to the type of banknote to be identified and the insertion direction, and the data of the zones is compared with the predetermined data. According to
The inserted banknotes may be classified according to the type of banknote to be identified and the insertion direction, and then divided into zones such that the characteristic elements to be detected of the separated banknotes fall within one zone.

Further, in the above embodiment, the insertion direction or the type of banknote is determined based on the detection result of one zone, but this can also be based on the calculation result obtained from the determination results of multiple zones. . Furthermore, the present invention can be easily and effectively applied to a case where a plurality of magnetic sensors are provided and a plurality of trace lines are provided.

[Effects of the Invention] As described above, according to the present invention, the leading end side of an inserted banknote is divided into a predetermined number of zones common to the type of banknote to be identified and the insertion direction,
By comparing the data of that zone with predetermined data, the inserted banknotes are classified according to the type of banknote to be identified and the insertion direction, and then the characteristic elements to be detected of banknotes of this classification are within one zone. Since the banknotes are divided into zones such that the banknotes are classified into two zones, if the inserted bill matches the classification, the data of the characteristic elements to be detected will be detected within one zone.

Therefore, even if the position of the characteristic element to be detected for identifying the inserted banknote differs depending on the type of banknote to be identified and the insertion direction, the data of the characteristic element to be detected can be stored within one zone. Detection can be performed to ensure reliable identification.

[Brief explanation of drawings]

FIG. 1 is a diagram showing an example of the configuration of a banknote validating machine that implements the banknote validating method of the present invention, FIG. 2 is an explanatory diagram showing banknotes handled by the banknote validating machine together with their zone division format, and FIG. 2 is a flowchart showing an example of a control procedure in the invention banknote identification method. DESCRIPTION OF SYMBOLS 1... Banknote, 2... Magnetic sensor, 3... Pulsing circuit, 4... Control circuit, 5... Position detection sensor, 6... Timing clock generation circuit.

Claims (1)

[Claims] 1 The inserted banknote is conveyed in the insertion direction, and during the conveyance, the banknote is scanned in the transport direction by a sensor, and the banknote is sequentially divided into zones from the leading end in the transport direction, and the output data of the sensor is read for each zone. In a banknote identification method in which the banknote is identified by detecting sensor output data for each zone and comparing the sensor output data for each zone with a predetermined reference value, for a predetermined number of zones on the front end side of the banknote, the type of banknote to be identified is determined. and a first step in which the banknotes are commonly divided into zones in the insertion direction and sensor output data is detected for each zone; and a second step in which the sensor output data is compared with predetermined data and the inserted banknotes are classified by type and insertion direction. 2 steps, and zones on the rear end side of the predetermined number of zones on the front end side are divided into zones such that the characteristic elements to be detected of the banknotes of the type and insertion direction corresponding to the classification results are included in one zone. and a third step of detecting sensor output data for each zone.