JPH03267227A - Fuzzy control device for paper feed adjustment - Google Patents

Abstract

PURPOSE:To securely carry out the feeding of paper sheets by providing a fuzzy logic control means with a gap adjusting means by which the gap is controlled so as to obtain a proper opposing gap corresponding to the initial feeding condition under various conditions on the basis of a fuzzy rule in which data for fuzzy variables are stored, to the initial feeding data of paper sheets detected by detecting means. CONSTITUTION:When paper sheets 12 are fed one by one, detecting means S1, S2 detect the feeding condition of paper sheets 12. A fuzzy logic control means 53 making the antecedent of these detecting elements outputs an optimum gap correction factor based on a fuzzy rule 55 to obtain the optimum consequent. Then, gap adjusting means 17a, 17b are fuzzy-logic-controlled by this output so that the facing gap between a feeding roller 14 and a gate roller can be controlled to an optimum value.

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 feeding of filter paper sheets, which can adjust the feeding state to the optimum feeding state from the initial stage of feeding 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, a detection sensor detects the feeding state of the paper sheets that have been fed out, and the gate roller is variably controlled based on this detection state to set a value suitable for the feeding gap of the paper sheets to ensure stable feeding. I try to do that.

However, because the structure detects paper sheets after they have passed through the gate roller, it is difficult to correct the paper sheets that have been fed out.For example, when handling circulating banknotes, they may be torn, folded, or have foreign matter such as tape or glue attached. In the case of sudden abnormalities such as when the gate roller is unstable, the stopping force of the gate roller may operate unstablely, causing skew in the initial stage of feeding, or slight fluctuations in the feeding pitch, which may cause problems such as complete feeding. I couldn't do it.

(C) Problems to be Solved by the Invention This invention accurately detects the feeding posture of paper sheets from the initial feeding stage, and adjusts all sheets to perfect feeding postures before feeding them. The purpose of the present invention is to provide a fuzzy control device for adjusting the feeding of paper sheets.

(d) Means for Solving the Problems The present invention is designed to individually separate opposing gaps on both sides in the feed width direction between a feed roller and a gate roller that operate to take out one sheet of paper stored in a paper sheet storage section. a gap adjustment means for adjusting the
a detection means that comes into contact with the paper sheets at the feeding position stored in the paper sheet storage section and detects the initial feeding state of the paper sheets, such as the degree of skew and the feeding pitch of the paper sheets to be fed; Based on the initial feeding data of paper sheets detected by the detection means, the gap adjusting means uses fuzzy rules containing data of fuzzy variables that provide an appropriate facing gap corresponding to the initial feeding state under various conditions. This is a fuzzy control device for adjusting the feeding of paper sheets, and a fuzzy inference control means for performing fuzzy inference control to determine the most appropriate facing gap.

(E) Effect of the Invention According to the present invention, when paper sheets are fed out one by one, the detection means detects the feeding state of the paper sheets, and the fuzzy inference control means uses this detection element as an antecedent to perform the following: In order to find the optimal consequent part, the most appropriate gap correction amount based on fuzzy rules is output, and the gap adjustment means is fuzzy adjusted to adjust the facing gap between the feed roller and the gate roller to the optimum value using this output. Inference control.

(f) Effects of the invention Therefore, even if paper sheets are to be fed out unstably due to sudden abnormalities such as tears, folds, or foreign matter such as tape or glue, the unstable initial stage Immediately detects the feeding condition, adjusts the facing gap between the feeding roller and gate roller to the optimum value, absorbs and eliminates skew and fluctuations in the feeding pitch at this sheet feeding regulation position, and corrects the perfect feeding posture. To perform a reliable feeding control operation that allows the feeding to be carried out with ease.

(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 is installed at a front side feeding position of a banknote storage section 13 that stores banknotes 12 in an upright position inside a cartridge, for example, and a feeding roller 14 is installed at this feeding position.
Left and right gate rollers 15a and 15b are provided oppositely to this to restrict one sheet from being dispensed.Furthermore, a support roller 16 for pinching and conveying the banknote 12 is provided oppositely to the downstream side of the payout position, and these rollers With the feeding action of 14 to 16, banknotes 12
are being rolled out one by one.

In this case, the feeding roller 14 and the left and right gate rollers 15a and 15b, which are disposed opposite to each other at the feeding position, are of an overlapping type with unevenness to promote separation, and the left and right opposing gaps Ll and L2 between the rollers are individually set. It is equipped with left and right gap adjustment devices 17a and 17b that can be automatically adjusted.

The left and right gap adjusting devices 17a and 17b mentioned above support gate rollers 15a and 15b, which are independently arranged on the left and right sides, through corresponding left and right forward/backward levers 18a, 18b, and by this forward/backward operation, Both gate rollers 15
a and 15b are moved toward and away from the feeding roller 14 to variably control the individual opposing gaps Ll and L2 between the rollers.

The above-mentioned feeding roller 14 has an outer diameter that allows one banknote 12 to be fed out in one rotation, and a feeding member 19 made of rubber or the like having a high coefficient of friction is provided around a part of its circumferential surface.

Furthermore, the gate rollers 15a and 15b have built-in one-way clutches that restrict rotation in the feeding direction in order to provide a sheet-feeding function, and the combination of these rollers executes the operation of feeding one bill.

By the way, as shown in FIG. 3, there are a left detection roller St and a right detection roller S at front facing positions of the banknote storage section 13.
2 are arranged independently in the feeding width direction, and these detection rollers Sl and S2 are in contact with the front surface of the banknotes 12 stored in alignment and rotate with the feeding operation of the banknotes. The rotational speeds of the detection rollers Sl and S2 are comparatively detected via the respective rotation detectors 20a and 20b, and the degree of skew of the initially fed bill 12 is detected.

Further, the feeding roller 14 is provided with a timing detection sensor S3 for detecting one rotation of the feeding roller and controlling the timing of feeding out one bill, as shown in FIG. , the ideal rotation speed V of both detection rollers Sl and S2 is determined from the detection signal of the timing detection sensor S3.
1, V2 can be assumed, but this and the actual rotational speed V3.
By comparing with V4, the length of the feeding pitch is detected.

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

The degree of skew is detected by S2, and the degree of feeding pitch is detected by combining the detection signal from the timing detection sensor S3, and based on these detection data, the left and right gate rollers 15a and 15b are individually driven, Perform the initial feeding operation while adjusting to the optimum feeding condition. As a result, the banknotes 12 that are fed out are free from skew, and
The feeding pitch is corrected to an appropriate feeding state in which the deviation in the feeding pitch is eliminated, and then the ball is fed out.

FIG. 5 shows a fuzzy inference control circuit for adjusting the feeding of banknotes.
According to the program stored in the OM 52, the optimum gap correction amount is output to the left gap adjustment device 17a and the right gap adjustment device 17b via the fuzzy inference engine (hereinafter referred to as FIE) 53, and the necessary control data at this time is output. R.A.
Store it in M54.

The above-mentioned FIE 53 uses the current detection elements determined by the detection signals from the left and right detection rollers 5IS2 and the timing detection sensor s3 as antecedent parts Xi, X2 (condition parts), and is set corresponding to these current detection elements. Left and right gap adjustment device 17a.

The gap correction degree of 17b is the consequent part Yl, Y2 (conclusion part)
Set a fuzzy rule to
2, and these outputs Z1 and Z2 feed roller 1.
4 and gate rollers 15a, 15b, opposing gaps Ll, L
2, and the fuzzy inference control is performed so that the feeding degree and feeding posture of the bill 12, which is fed out while being regulated by the gap adjustment, is fed out by correcting the feeding degree and feeding posture.

The above-mentioned fuzzy rules are set according to a predetermined fuzzy rule table 55, and are set to determine appropriate values corresponding to the degree of skew of the banknotes 12 at the initial stage of feeding and the degree of pitch of the banknotes 12. 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 6 (a) and (b).
(antecedent part) and a membership function using fuzzy variables as shown in FIGS. 7(a), 7(b), and (consequent part).

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). The membership function that indicates the degree of skew xl determined from the rotational speed difference between the left and right detection rollers Sl and S2 in Fig. 6 (a) is as follows: NL: Significant left skew NM: Some degree of left skew NS: PS: Slightly left skew 2 PS: Slightly right skew PM: Some degree of right skew PL: Significant right skew.

The membership function indicating the feeding pitch degree X2 determined from the detection signals of the left and right detection rollers 81.32 and the detection signal of the timing detection sensor S3 in FIG. 6(b) is as follows: NL: Quite long pitch NM: NS: Slightly long pitch 2; Appropriate feeding pitch PS: Slightly short pitch PM: Somewhat short pitch PL: Fairly short pitch.

Output degree Yl of the left clearance adjustment device 17a in FIG. 7(A)
The membership function showing NL2 considerably reduces the opposing gap NM: reduces the opposing gap to some extent NS: slightly reduces the opposing gap 2: maintains the standard opposing gap PS: slightly increases the opposing gap PM2 PL where the opposing gap is increased to a certain extent: This indicates that the opposing gap is significantly increased.

Output degree Y2 of the right clearance adjustment device 17b in Fig. 7 (b)
The membership functions showing the following are: NL2: NM, which makes the opposing gap considerably smaller; NS, which reduces the opposing gap to some extent: NS: Makes the opposing gap a little smaller 2: PS2, which maintains the standard opposing gap; PM2, which slightly increases the opposing gap. PL where the opposing gap is increased to a certain extent: This indicates that the opposing gap is significantly increased.

Furthermore, as an example of the setting of the fuzzy rule table 55 mentioned above, as shown in FIG. , furthermore, the pitch of the banknotes is shorter than the standard pitch (X2 = PM
), then the opposing gaps Ll, L
2 tends to be large, the FIE 53 reduces the left opposing gap Ll of the left clearance adjustment device 17a to a certain extent L (Yl = NM), and slightly reduces the right opposing gap L2 of the right clearance adjustment device 17b (Y2 =NS), the gap between the feeding roller 14 and the gate rollers 15a, 1.5b is adjusted to the optimum gap depending on the banknote, and each banknote is fed at a standard feeding pitch without skew.

i f Xi =NS X2 =PMthe
n Yl = NM Y2 = NS (Rule 2) If the banknotes are not tilted at the time of initial feeding (Xi = 2)
, if it is detected that the bill feeding pitch is a little longer than the standard feeding pitch (X2 = PS), then the FIE is performed based on the fact that the opposing gap tends to be small.
53, the opposing gap between the left and right gap adjustment devices 17a and 17b is slightly larger (Yl = PS) (Y2 = PS)
The facing gaps L1 and L2 between the feed roller 14 and the gate rollers 15a and 15b are adjusted to the optimum gap according to the banknote, and each banknote is fed at a standard feed pitch without skew.

i 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 slightly skewed to the right (XI = PS), and the banknote feeding pitch is longer than the standard feeding pitch ( X2=N
M), then the opposing gap Ll,
Based on the fact that L2 tends to be small, FIE53
The left opposing gap L1 of the left gap adjusting device 17a is increased to a certain extent L (Yl = PM), the right opposing gap L2 of the right gap adjusting device 17b is slightly increased (Y2 = PS), and the feeding roller 14 and the gate roller 15a, 15b, by adjusting the opposing gaps L1 and L2 to the optimum gap depending on the banknote,
Each banknote is fed out with a standard feeding pitch without skew.

f XI = PS X2 =
NMthen Yl=PM Y2
=PS In this way, as shown in (Rules 1 to 3)..., in response to the input of the antecedent part of if..., under the conditions that the banknote 12 is in an appropriate feeding state, then... Rules are set by matching the consequent of .

As mentioned above, even if a banknote were to be unstably dispensed due to a sudden abnormality such as a tear, a fold, or a foreign object such as tape or glue attached, the unstable initial dispensing state would be immediately detected. Then, adjust the facing gap between the feed roller and the gate roller to an optimal value, absorb and eliminate skew and fluctuations in the feed pitch at this sheet feed regulation position, and correct the perfect feed posture before feeding. Executes reliable feeding control operations that can be performed with ease.

In the correspondence between this invention and the configuration of the above-mentioned embodiment, the paper sheet of this invention corresponds to the banknote 12 of the embodiment, and similarly, the paper sheet storage section corresponds to the banknote storage section 13. However, the gate roller corresponds to the left gate roller 15a and the right gate roller 15b, the gap adjustment means corresponds to the left gap adjustment device 17a, the right gap adjustment device 17b, and the CPU 51, and the detection device corresponds to the left detection roller S1, the right detection roller, S2, and the timing detection sensor S3, and the fuzzy inference control means corresponds to the fuzzy inference engine (FIE) 53, but the present invention is limited to the configuration of the above-described embodiment. isn't it.

[Brief explanation of drawings]

The drawings show an embodiment of the present invention, FIG. 1 is a side view of the main part of the banknote dispensing mechanism, FIG. 2 is a plan view of the main part of the banknote dispensing mechanism, and FIG. 3 is a front view of the main part of the banknote dispensing mechanism. Figure 4 is a time chart when initial feeding is detected.
Fig. 5 is a fuzzy control block diagram when adjusting bill feeding, Fig. 6 (a) is a membership function diagram showing the degree of skew, Fig. 6 (b) is a membership function diagram showing the degree of feeding pitch, Fig. 7 (A) is a membership function diagram showing the output degree of the left clearance adjustment device, and FIG. 7 (B) is a membership function diagram showing the output degree of the right clearance adjustment device. 12...Banknote 13...Banknote storage section 14
... Feeding rollers 15a, 15b - Gate rollers 17a, 17b ... Gap adjustment devices Ll, L2 ... Opposing gaps St, S2 ... Detection roller S3 ... Timing detection sensor 51 ... CPU 5
3... Fuzzy inference engine (FIE) 55...
・Fuzzy rule table figure 3 Main part front view of paper 11. 12. Fuzzy variable of 15 times the previous time sweat 15

Claims (1)

[Claims] (1) Gap adjustment means for individually adjusting opposing gaps on both sides in the feeding width direction between a feeding roller that operates to take out one sheet of paper stored in a paper sheet storage section and a gate roller; a detection means for detecting an initial feeding state of paper sheets such as a degree of skew and a feeding pitch of the paper sheets to be fed out by contacting the paper sheets stored in the storage section at a feeding position; Based on the detected initial feeding data of paper sheets, the gap adjustment means is adjusted to the most appropriate value based on fuzzy rules containing data of fuzzy variables that provide an appropriate facing gap corresponding to the initial feeding state under various conditions. A fuzzy control device for adjusting the feeding of paper sheets, comprising fuzzy inference control means for performing fuzzy inference control in opposing gaps.