JPH03264429A - Fuzzy control device for adjusting delivery of paper sheet and the like - Google Patents

Abstract

PURPOSE:To prevent the occurrence of hindrance to the carriage of a paper sheet and the like in the device in the title for a cash dispenser by dividing an initial delivery roller into two in a delivery widthwise direction, obtaining a feed rate from data such as the skew of the paper sheet and the like, and a delivery pitch in accordance with a fuzzy rule, and independently driving each delivery roller. CONSTITUTION:An initial delivery roller is constituted with right and left deliv ery rollers R1 and R2. Also, the extent of skew of a paper sheet and the like is detected with right and left detection rollers S1 and S2. Furthermore, a deliv ery pitch rate is detected with delivery detection rollers S3 and S4. Data detected with the aforesaid rollers S1 to S4 is inputted to CPU. The CPU processes the data in accordance with a fuzzy rule, operates an optimum feed rate correction amount, and controls right and left drive motors M1 and M2 independently, thereby actuating the rollers R1 and R2 independently. According to the aforesaid construction, hindrance to the carriage of the paper sheet and the like is prevented and reliability in the carriage of the paper sheet and the like can be improved.

Description

DETAILED DESCRIPTION OF THE INVENTION (a) Industrial field of application The present invention relates to a paper sheet dispensing device that is internally configured in an automatic teller machine that handles paper sheets such as banknotes. The present invention relates to a fuzzy control device for adjusting the delivery of paper sheets, which allows the paper sheets to be delivered while adjusting the initial state of delivery of the leaves.

(b) Conventional technology In general, this type of paper sheet feeding device uses the feeding action of a feeding roller disposed at the feeding position of the paper sheet storage section and the single-sheet feeding regulating action of a gate roller. They are fed out one by one (for example, the earlier application for patent application Hei 1-17
Publication No. 6703).

In this case, the gate rollers are variably controlled to always set the paper sheet feeding gap to an optimal value to ensure stable feeding without any feeding defects, but for example when handling circulating banknotes, If the gate roller has a tendency to bend, bend, or have a weak stiffness, or if there is foreign matter such as tape or glue attached, the stopping force of the gate roller will not be able to follow suit sufficiently, resulting in slight skew or a slight change in the feeding pitch in the initial stage of feeding. It fluctuated and could not be completely accurate.

(C) Problems to be Solved by the Invention This invention provides a method for feeding out paper sheets in which the feeding posture of the paper sheets is adjusted to a perfect feeding posture at the initial feeding stage of the paper sheets, and then the paper sheets are fed out. The purpose of this invention is to provide an adjustable fuzzy control device.

(D) Means for Solving the Problems This invention provides a method in which a feed roller that contacts paper sheets stored in a paper sheet storage section and brings out one sheet of paper is divided into two in the feed width direction. A feeding degree control means that independently drives both of the feeding rollers to adjust the feeding degree of the paper sheet, and a detection unit that detects the feeding state of the paper sheet such as the degree of skew and feeding pitch of the paper sheet to be fed. Based on fuzzy rules containing fuzzy variable data that provides an appropriate feeding degree corresponding to the feeding state under various conditions, based on the means and the feeding data of paper sheets detected by the above-mentioned detection means,
The present invention is a fuzzy control device for adjusting the feeding of paper sheets, comprising fuzzy inference control means for controlling the above-mentioned feed degree control means by fuzzy inference to the most appropriate degree of feed.

(E) Effect of the Invention According to this invention, when the detection means detects the feeding state of paper sheets when paper sheets are fed out, the fuzzy inference control means uses this detection element as an antecedent to determine the optimum result. The feed rate is controlled by outputting the most appropriate feed speed correction amount based on fuzzy rules in order to find the correct part, and using this output to adjust the feed rate of each independent feed roller on both sides to the optimal value. Fuzzy inference control means.

(F) Effect of the invention Therefore, even if the paper sheet is unstably fed out due to changes in the quality of the paper sheet or changes in the roller over time, there will be no skew or fluctuation in the feeding pitch at the initial feeding position of the feeding roller. It is possible to absorb and eliminate this, correct the feeding position to the perfect feeding position, and feed the paper. As a result, a highly reliable feeding control operation that prevents conveyance failures in the subsequent stage can be executed.

(g) Examples An embodiment of the present invention will be described in detail below based on the drawings.

The drawings show a bill payout adjustment fuzzy control device that is installed in a bill payout mechanism, and in FIGS. 1 and 2,
This banknote feeding mechanism 11 includes left and right detection rollers Sl disposed along a feeding path 14 for banknotes 13 fed out from a banknote storage box 12.

S2, left and right initial feed rollers R1, R2, left and right feed rollers R3, R4, and left and right gate rollers R5.
, R6, and left and right feeding detection sensors S3. It consists of S4.

The above-mentioned banknote storage box 12 presses and urges the stacked banknotes 13 upward from below with a banknote pressing plate 15, and at this upper opposing position are left and right initial feeding rollers R1 divided into two on a coaxial line in the feeding width direction. , R2 are arranged and received, and the stacked banknotes 13 on the upper surface are provided in a contactable state in which they can be fed out by these rollers R1 and R2.

These left and right initial dispensing rollers R1 and R2 are independent at the upper surface dispensing position of the banknote storage box 12 where the top surface is open, the left initial dispensing roller R1 is driven by the left drive motor M1, and the right initial dispensing roller R2 is independent by the right drive motor M2. By rotationally driving both rollers R1 and R2, the banknotes 13 on the upper surface are sequentially fed out from the banknote storage box 12 in an initial stage.

In addition, a left detection roller Sl and a right detection roller S2 are independently arranged near the left initial delivery roller R1 and the right initial delivery roller R2, respectively, and these detection rollers Sl and S2 are arranged as described above. Similarly to the initial feeding rollers R1 and R2, they rotate as the banknotes are fed out while facing the upper surface of the stacked banknotes 13, and the rotation speeds of the left and right detection rollers Sl and S2 are compared during this initial feeding. The degree of gap between the initially fed banknotes 13 is detected.

At the feeding position of the feeding path 14, feed rollers R3 and R4 are equipped with a high friction member 16 such as a rubber material on a part of the circumferential surface to feed one sheet in one rotation, and feed rollers R3 and R4 that rotate in the feeding direction. - Gate rollers R5 and R6 for sheet output control are installed oppositely, and one feed roller R3
A timing detection sensor S5 is disposed for detecting one rotation of the feed roller and controlling the timing for dispensing one bill.

At the downstream position of these rollers R3 to R6, left and right feed-out detection sensors S3. S4 is provided to detect the pitch between the bills 13 being dispensed.

Then, in the initial feeding stage where the banknotes 13 are fed out from the banknote storage box 12, the left and right detection rollers Sl.

The degree of skew is detected by S2, and the left and right feeding detection sensors S3. In step S4, the degree of the feeding pitch is detected, and based on the detected data, the left and right initial feeding rollers R1 and R2 are independently driven to perform the initial feeding operation while adjusting to the optimum feeding state. As a result, the banknotes 13 to be fed out are corrected to a proper feeding state in which skew and feeding pitch deviations are eliminated, and the banknotes 13 are fed out.

FIG. 3 shows a fuzzy inference control circuit for adjusting the feeding of banknotes, in which the CPU 31 controls the left and right detection rollers Sl.

S2 and left and right feeding detection sensors 33. According to the detection signal input from S4 and the program stored in the ROM 32, the left drive motor M1 and the right drive motor M2
Then, the optimum feed rate correction amount is outputted via the fuzzy inference engine (hereinafter referred to as FIE) 33, and the necessary control data at this time is stored in the RAM 34.

The above-mentioned FIE 33 includes left and right detection rollers Sl.

The current detection element determined by the detection signal from S2 is expressed as the antecedent part X1. A fuzzy rule is set in which X2 (condition part) is set, and the degree of feeding of the banknote 13 set corresponding to this current detection element is set as consequent part Yl, Y2 (conclusion part),
The most appropriate feed speed correction amount (motor rotation speed) Zl, Z2 is output from the above-mentioned detection element based on the fuzzy rule, and the banknote 13 is fed out via the circumferential drive motors Ml, M2 using these outputs Zl, Z2. Fuzzy inference control is performed so that the feeding degree is corrected to the perfect feeding posture.

The above-mentioned fuzzy rule is set according to a predetermined fuzzy rule table 35, and is an appropriate value corresponding to the degree of gap of the banknotes 13 at the initial feeding stage and the degree of pitch of the banknotes 13. Determine this in advance, compare this appropriate value with the detected facts, and draw the most appropriate conclusion for these facts as shown in Figure 4 (a) and (b).
(antecedent part) and a membership function using fuzzy variables as shown in FIG. 5 (consequent part) (a) and (b).

In this membership function, the fuzzy set degree (
Each label (fuzzy value) indicating the grade (grade) is displayed by combining the direction display group (negative direction N, reference Z, positive direction P) and the degree display group (large L, medium M, small S). Set the left and right detection rollers 81 in Fig. 4 (a). The membership function indicating the degree of skew XI determined from the difference in rotational speed of S2 is as follows: NL: Significant left skew NM: Some degree of left skew NS: Slight left skew Z No skew PS: Slight right skew PM : Indicates a certain degree of right skew. PL: Indicates a considerable right skew.

The membership function indicating the feeding pitch degree X2 obtained from the previous bill feeding detection time detected by the left and right feeding detection sensors S3 and S4 in FIG. 4 (b) and the current bill feeding detection time is NL: quite long. Pitch NM: Somewhat long pitch NS: Slightly long pitch Z: Appropriate feeding pitch PS: Slightly short pitch PM: Somewhat short pitch PL: Fairly short pitch .

The membership function indicating the degree of rotational output Yl of the left drive motor in Fig. 5 (a) is as follows: NL: The rotation speed is considerably slowed down. NM: The rotation speed is slowed down to a certain extent. NS: The rotation speed is slowed down a little. 2: Standard PS to maintain the rotational speed: PM to increase the rotational speed a little, PM to increase the rotational speed to some extent, PL to increase the rotational speed to a considerable extent.

The membership function showing the degree of rotation output Y2 of the right drive motor in Fig. 5 (b) is as follows: NL: The rotation speed is considerably slowed down. NM: The rotation speed is slowed down to a certain extent. NS: The rotation speed is slowed down a little. 2: The rotation speed is slowed down to a certain extent. The rotation speed is maintained PS: The rotation speed is slightly increased PM: The rotation speed is increased to a certain extent PL: The rotation speed is increased considerably.

Furthermore, as an example of the setting of the fuzzy rule table 35 mentioned above, as shown in FIG. Furthermore, the pitch of the banknotes is shorter than the standard pitch (X2 = PM)
If it is detected that
, slightly lower the rotation speed of right drive motor M2 (Y2 =
NS), the skew is eliminated at the positions of the initial feed rollers R1 and R2, and the feed pitch is adjusted to the standard.

i f XI = N S X2 = PMt
hen Yl = NM Y2 = NS (Rule 2
) If the banknotes are not tilted at the time of initial dispensing (XI=2)
If it is detected that the bill feeding pitch is a little longer than the standard feeding pitch (X2=PS), then the FIE33 slightly increases the rotational speed of both the left and right drive motors Ml and M2 (Y1=PS). ) (Y2 = PS), adjust the initial feeding roller R1° to the standard feeding pitch at the position of R2.

j f XI =Z X2 =PSthe
n Yl = PS Y2 = PS (Rule 3) If, at the time of initial feeding, the right side of the banknote is slightly ahead and a little skewed (XI = PS), and the banknote feeding pitch is longer than the standard feeding pitch (X2 = NM )
If it is detected that
, slightly increase the rotation speed of right drive motor M2 (Y2 =
PS), the skew is eliminated at the positions of the initial feed rollers R1 and R2, and the feed pitch is adjusted to the standard feed pitch.

i f XI = PS X2 = NMthe
n Yl = PM Y2 = PS Thus, (
As shown in rules 1 to 3)..., the consequent part of then... is made to correspond to the input of the antecedent part of if... rules are set.

As mentioned above, even if the banknotes are unstably fed out due to changes in the paper quality of the banknotes or changes in the rollers over time, the initial feeding position of the initial feeding roller absorbs and eliminates the skew and fluctuations in the feeding pitch. can be corrected to a perfect feeding posture and fed out, and as a result, a highly reliable feeding control operation that prevents conveyance failures in subsequent stages can be executed.

In the correspondence between this invention and the structure of the above-mentioned embodiment, the paper sheet storage section of this invention corresponds to the banknote storage box 12 of the embodiment, and similarly, the paper sheet corresponds to the banknote 13. The feeding rollers correspond to the left initial feeding roller R1 and the right initial feeding roller R2, the feeding degree control means corresponds to the left drive motor Ml, the right driving motor M2, and the CPU 31, and the detection means corresponds to the left initial feeding roller R1 and the right initial feeding roller R2. Roller S1, right detection roller 82, and left feeding detection sensor S
3 and the right feed detection sensor S4, the fuzzy inference control means includes a fuzzy inference engine (FI
E) Corresponding to 33, the present invention is not limited to the configuration of the above-described embodiment.

[Brief explanation of drawings]

The drawings show an embodiment of the present invention; FIG. 1 is a plan view of the main part of the bill dispensing mechanism, FIG. 2 is a vertical sectional side view of the main part of the bill dispensing mechanism, and FIG. 3 is a fuzzy control block when adjusting the bill dispensing mechanism. Figure 4 (a) is a membership function diagram showing the degree of skew, Figure 4 (b) is a membership function diagram showing the degree of feeding pitch, and Figure 5 (a) is a diagram showing the degree of rotational output of the left drive motor. Figure 5 (b) is a membership function diagram showing the degree of rotational output of the right drive motor. 12...Banknote storage box 13...Banknote 31.
・CPU 33...Fuzzy inference engine (FIE) 35・
...Fa R1, R2 51, 52 S3.54 Ml, M2 Sea rule table...Initial feeding roller...Detection roller...Feeding detection sensor...Drive motor R1...Near morning U best roll roller Fig. 4 (a) Skew, degree 8 () shown in front of the mempansive opening diagram;
Fuzzy variables in front of M diagram Figure 5

Claims (1)

[Claims] (1) The feed-out roller that comes into contact with the paper sheets stored in the paper sheet storage section to eject a single sheet is divided into two in the feed width direction, and both of these feed-out rollers are independently driven to separate the paper sheets. a feeding degree control means for adjusting the feeding degree of the sheet; a detecting means for detecting the feeding state of the paper sheet such as the degree of skew and the feeding pitch of the sheet to be fed; and the paper sheet detected by the detecting means. Based on fuzzy rules containing data of fuzzy variables that provide an appropriate feed degree corresponding to the feed state under various conditions, the feed rate control means is controlled by fuzzy inference to the most appropriate feed degree. A fuzzy control device for adjusting the feeding of paper sheets.