JPH01219989A - Counting and discriminating system for paper leaf - Google Patents

Abstract

PURPOSE:To prevent the deterioration of the discrimination accuracy by monitoring the light receiving quantity of a light receiving means of a sensor and correcting the light quantity of a light emitting means to a prescribed level, based on a result of this monitoring. CONSTITUTION:On a carrying path of a paper leaf, a sensor consisting of a light emitting part 10 and a light receiving part 11 is provided. Before the paper leaf is carried and its discrimination processing is executed by this sensor, the sensor is operated. An output of the light receiving device 11 in this case is inputted to a light quantity adjusting part 15 through an amplifier 12, an A/D converter 13 and a mode selecting part 14, and the emitted light quantity of the light emitting part 10 is corrected so as to become a prescribed level by this light quantity adjusting part 15. An output of the light receiving part 11 when the paper leaf has been carried to the carrying path is supplied to a data processing part 16.

Description

[Detailed description of the invention] [Industrial use! ``P1'' is used, for example, in a device installed in a bank or other financial institution for counting banknotes, and relates to a method for counting and discriminating paper sheets.

[Prior Art] A banknote counting and processing device installed in a bank or the like has a hopper into which banknotes are placed, and a conveyance path equipped with a conveyor or the like that conveys the banknotes from the hopper. 1
It is designed to be separated and sent out one by one. Then, a discrimination section is provided in the middle of the conveyance path of the banknotes, and the discrimination section counts the banknotes, determines the denomination, and inspects the authenticity.

Differentiation is carried out, including inspections for damage and dents. Further, based on the discrimination result in the discrimination section, the regular bills of a certain denomination and the rejected bills of other denominations are separated and stored in the regular bill stacker and the rejected bill stacker, respectively.

Here, the discrimination section has a sensor consisting of a light emitting means such as a lamp and a light receiving means such as a solar cell, and the bill is conveyed between the light emitting means and the light receiving means. The various types of discrimination processing described above are performed based on the transmitted light value of the banknote.

[Problem 1 to be Solved by the Invention Here, in order to accurately perform the above-described discrimination processing, the level of the amount of light received by the light receiving means must be constant. Further, the sensors must be provided at a plurality of locations in a direction perpendicular to the direction in which the banknotes are conveyed, or the level of light received by each of these sensors must be the same. Therefore, the amount of light is adjusted in advance to make the level of light received by each sensor constant, but this level of light may change due to the influence of the temperature in the device, and may also change during long-term use. 1. Changes may occur in the light-emitting characteristics and light-receiving characteristics of the light-emitting means and the light-receiving means, and the light-receiving level may gradually decrease. Therefore, if the light is not adjusted frequently, the identification accuracy may deteriorate. be.

The present invention has been made in view of the above points, and an object of the present invention is to develop a method for identifying paper sheets so that the sensor can be operated with the light reception level always maintained at a constant level. It is about providing.

[Means for Solving the Problems 1] In order to achieve the above-mentioned object, the present invention provides light-emitting means provided at positions below L of the conveyance path of paper sheets, and electrical signals from the light-receiving layer from the light-emitting means. and a light amount adjusting means for adjusting the amount of light emitted from the light emitting means in the sensor, and the sensor is actuated before the paper sheet is conveyed and subjected to identification processing. , the amount of light received by the light receiving means is monitored, and based on the monitoring result, the amount of light emitted from the light emitting means is corrected to a constant level by the light sensitivity adjustment stage f. .

[Operation j] Before sending a sheet of paper into the conveyance path, one light emitting means is activated to emit light, and the light from the light emitting means is received by the light receiving means without passing through the sheet of paper, thereby monitoring the sensor. Then, the amount of light received is compared with a reference level, and if the light receiving layer is higher than the reference level, the amount of light emitted from the light emitting means is decreased, and if the light receiving layer is lower than the reference level, the amount of light emitted from the light emitting means is increased. By adjusting the amount of light so as to make the amount of light emitted, the amount of emitted light is automatically corrected so as to keep the light emission level constant. As a result, when the paper sheet is actually conveyed, it becomes possible to accurately identify the paper sheet.

[Example] Hereinafter, an example of the present invention will be described in detail based on the drawings. Note that in this embodiment, the bill counting and discrimination method in the bill counting and processing device will be described, and it goes without saying that it can also be used as a method for counting and discriminating paper sheets other than this.

First, FIG. 1 shows the overall configuration of a banknote counting and processing device. In the figure, 1 indicates a hopper, and the hopper 1 includes banknotes 2 and 2.
are stored in a stacked state. The hopper 1 is provided with a banknote separation/takeout mechanism consisting of a separation roller 3 and a press roller 4 for separating and taking out the banknotes 2 one by one. The banknotes 2 taken out by the banknote separation/takeout mechanism are conveyed to a discrimination section 6 by a conveyor 5, where the conveyance banknotes 2 are counted, and their denominations are determined and their authenticity is determined. In addition to performing inspection and discrimination processing such as checking for damage and dirt, the conveyance conditions such as skewed conveyance and double conveyance are also checked. After the discrimination process is performed in the discrimination section 6 as described above, the banknotes 2 are sent from the discrimination section 6 to the conveyor 7, and the proper bills of a certain denomination are placed in the bill stacker 8, and the other bills are placed in the stacker 8. The excluded ticket is removed from the excluded ticket stacker 9.
It is designed to be stored in

Next, FIG. 2 shows the structure of the banknote 2 discrimination mechanism in the discrimination section 6. In the figure, 1o is a lamp.

A light emitter consisting of a light emitting diode or the like; 11 is the light emitter I;
A light receiver made of, for example, a solar cell, which receives light from O and performs photoelectric conversion.A bill 2 is conveyed between the light emitter 10 and the light receiver 11. The device 10 and the light receiver 11 constitute a sensor for obtaining data on the banknote 2 identification process.

The light reception signal from the light receiver 11 is amplified by an amplifier 12, digitally converted by an A/D converter 13, and inputted to a mode selection section 14. The mode selection unit 14 selects a monitor mode based on an input signal when an operation is started or ended manually using an operation panel (not shown) connected to the banknote counting processing device. At the start of the operation, the amount of light received by the °C sensor is monitored, and when the amount of light received falls within a certain range, the mode is converted to measurement mode. When the banknotes 2 are put into the hopper 1 and the start button is pressed, the monitor mode is first entered, and the light receiving signal from the light receiver 11 adjusts the light intensity while the banknotes 2 are not being conveyed. The signal is input to B15 so that the amount of light emitted by the light emitter 10 can be adjusted. Also, when the light amount is adjusted as described above,
After switching to the measurement mode, the banknote 2 is transported, and the amount of light transmitted through the banknote 2 when the banknote 2 passes through the discrimination section 6 is incident on the light receiver 11, and based on the amount of light received. Photoelectric conversion is performed, and this signal is sent to the data processing unit 16.
The data processing unit 16 processes the read data, and as a result, the banknote 2
Identification will be carried out.

The specific configuration of this data processing section I6 is well known, so its explanation will be omitted.

Here, the above-mentioned light amount adjustment section 15 has a reference level setting section 17 and a comparator 18, and the reference level setting section 17 sets the standard of the light reception level of the light receiver 11 without passing the banknote 2. A value is set in advance, and the value of receiver 1 is
When the received light amount signal in step 1 is input to the comparator 18, this received light amount signal is compared with the reference level of the received light amount set in the reference level setting section 17.

Then, in this comparator 18, a comparison signal consisting of the difference between the light reception level measured by the light receiver 11 and the reference level of the reference level setting section 17 is obtained. This comparison signal is D
, /A converter 19 converts the signals into analog signals and inputs them to the light emitter drive circuit 20 as a light emission level increase/decrease signal. This light emission level increase/decrease signal is input to the light emitter drive circuit 20, and when the received light level is lower than the reference level, the amount of emitted light is increased, and when the received light level is high, the amount of emitted light is decreased. The temperature is now corrected to

The banknote counting and processing device is constructed as described above.Next, a method for validating banknotes in this banknote counting and processing device will be described with reference to FIG.

First, banknotes 2 to be counted are piled up and put into the hopper 1. Then, an input operation is performed using the operation panel to start processing the banknote 2.

As a result, the device starts operating, various data in the data processing section 16 in the discrimination section 6 are initialized, and the mode selection section 14 becomes the monitor mode, one light emitter 10 lights up and the light receiver 11, but the transport system for banknotes 2 is kept in a stopped state. As a result, depending on the light receiver 11, monitor light reception is performed in a state without using a banknote, that is, in a non-measurement state, and the amount of received light is photoelectrically converted and digitally converted by the A/D converter 13. The monitor light reception level is detected.

This monitor light reception signal is input to the comparator 18 in the light adjustment section 15, and the level of this received light amount is compared with the reference level in the fermentation level setting device 17.

Here, if the level of the monitor light reception signal is lower than the reference level, the comparator 18 outputs a light amount increase signal to the light emitter drive circuit 20, and the light emitter is driven based on this light 1 & increase signal. In the circuit 20, the amount of light emitted by the light emitter JO is increased. On the other hand, if the monitor light reception level is higher than the reference level, a light amount reduction signal is input to the single light emitter drive circuit 20, and the amount of light emitted by the light emitter 10 is reduced based on this signal.

By monitoring light reception as described above, when the received light level is adjusted to within the range of the level set in advance in the reference level setting section 17, the measurement mode is selected by the mode 1 selection section 14. will be done. Therefore, the sensor consisting of the light emitter 10 and the light receiver 11 is kept in an operating state, and the separating roller 3. Conveyor 5. The banknote conveyance system consisting of the discrimination section 6 is operated to separate the banknotes 2 one by one and send them to the discrimination section 6 via the conveyor 5. As a result, from the emitter IO to the receiver 1
The optical path toward 1 will be blocked by banknote 2,
The light receiver 11 will receive the light that passes through the banknote 2, and the light receiver will change.

Here, by keeping the conveyance speed of the banknote 2 constant, the direction of the short side of the banknote 2 is determined based on the time from when the banknote 2 reaches the sensor position to when the banknote 2 passes through the sensor position. The length can be detected, and by detecting changes in the amount of light received by the light receiver 11 while the banknote 2 passes through the sensor placement position, the pattern of the banknote 2, the presence or absence of watermarks, etc. can be detected. Be able to detect patterns. Therefore, by importing these data into the data processing unit 16 and performing predetermined processing, the banknotes 2 are counted and their denominations are determined.

A counting and discrimination process is performed, which includes checking for authenticity and checking for damage and defacement. Furthermore, by providing a plurality of the above-mentioned sensors in a direction perpendicular to the banknote conveyance direction,
It is also possible to detect the conveyance state of banknotes, for example, skewed conveyance, double conveyance, etc. Therefore, prior to executing this count discrimination process, the monitor mode
Since the light receiving level in banknote 1 is adjusted accurately, it becomes possible to obtain accurate data regarding the amount of light transmitted through banknote 2, and the identification accuracy is significantly improved.

The banknotes 2 that have been subjected to the counting and discrimination process in the discrimination section 6 as described above are sent to the conveyor converter 7, and the regular bills of a certain denomination are stored in the regular bill stacker 8, and the other rejected bills are stored in the regular bill stacker 8. The tickets will be stored in the rejected ticket stacker 9. Then, by repeating this operation, the counting and discrimination processing of the banknotes 2 put into the hopper 1 is sequentially performed.

When all the counting and discrimination processes for the banknotes are completed and a manual operation is performed using the operation panel to indicate that the operation has ended, the mote selection unit 14 selects the monitor mode again, and the light emitter 10 in a state where the banknotes 2 are not present. Receiver 11 of light from
The amount of light received is monitored, and the level of this monitored light reception is compared with the reference level in the reference level setting section 17 in the comparator F8. As a result, if the monitor light reception level is within the range of the reference level, it is assumed that the counting and discrimination process of the banknotes 2 described above has been performed accurately, thereby completing the operation. On the other hand, if the monitor light reception level is outside the range of the reference level, the power supply voltage may change during the counting discrimination process.
Assuming that accurate processing has not been performed, an NG display is displayed instructing the counting and discrimination processing to be re-performed.

[Effects of the Invention] As explained above, the present invention monitors the light receiver in the sensor that detects the amount of transmitted light of one sheet and makes sure that the amount of received light is constant before performing the identification process on the sheet. Since the correction is made so that the tip part is automatically adjusted each time the discrimination process is performed,
The identification accuracy is significantly improved.

[Brief explanation of the drawing]

The drawings show one embodiment of the present invention. FIG. 1 is an explanatory diagram showing the configuration of a banknote counting processing device, FIG. 2 is a block diagram showing the mechanism of the counting discrimination section, and FIG. It is a flowchart 1 diagram showing the procedure to be performed. l: hopper, 2: bill, 6: fg separate section, 10: light emitter,
11: Light receiver, 13: A/D converter, 14: Mote selection section, 15: Light amount adjustment section, 16: Data processing section, 17: Reference level setting section, 18: Comparator, 19: D/A converter ,
20: Light emitter drive circuit.

Claims (1)

[Claims] A sensor consisting of light emitting means provided at the upper and lower positions of the conveying path of paper sheets, and a light receiving means that converts the amount of light received from the light emitting means into an electrical signal, and a light amount adjustment that adjusts the amount of light emitted by the light emitting means in the sensor. and means for activating the sensor before conveying the paper sheet and performing the identification process,
A method for counting and identifying paper sheets, characterized in that the amount of light received by the light receiving means is monitored, and based on the result of this monitoring, the light amount adjusting means corrects the amount of light from the light emitting means to a constant level.