CN103177499B - Sheet paper identification device - Google Patents
Sheet paper identification device Download PDFInfo
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- CN103177499B CN103177499B CN201210505508.8A CN201210505508A CN103177499B CN 103177499 B CN103177499 B CN 103177499B CN 201210505508 A CN201210505508 A CN 201210505508A CN 103177499 B CN103177499 B CN 103177499B
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- 238000012937 correction Methods 0.000 claims abstract description 27
- 238000003860 storage Methods 0.000 claims abstract description 9
- 238000000034 method Methods 0.000 description 20
- 230000015572 biosynthetic process Effects 0.000 description 16
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Classifications
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- G—PHYSICS
- G07—CHECKING-DEVICES
- G07D—HANDLING OF COINS OR VALUABLE PAPERS, e.g. TESTING, SORTING BY DENOMINATIONS, COUNTING, DISPENSING, CHANGING OR DEPOSITING
- G07D7/00—Testing specially adapted to determine the identity or genuineness of valuable papers or for segregating those which are unacceptable, e.g. banknotes that are alien to a currency
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- G—PHYSICS
- G07—CHECKING-DEVICES
- G07D—HANDLING OF COINS OR VALUABLE PAPERS, e.g. TESTING, SORTING BY DENOMINATIONS, COUNTING, DISPENSING, CHANGING OR DEPOSITING
- G07D7/00—Testing specially adapted to determine the identity or genuineness of valuable papers or for segregating those which are unacceptable, e.g. banknotes that are alien to a currency
- G07D7/06—Testing specially adapted to determine the identity or genuineness of valuable papers or for segregating those which are unacceptable, e.g. banknotes that are alien to a currency using wave or particle radiation
- G07D7/12—Visible light, infrared or ultraviolet radiation
Abstract
The invention provides a kind of sheet paper identification device, when recognizing foreign matter, no matter whether this foreign matter exists, and can judge with the true and false of constant precision to paper.A kind of sheet paper identification device, judges the true and false of paper, possesses: sensor, detect the feature of described paper; Storage part, stores the judgment threshold of the true and false for judging described paper; Correction unit, corrects the output of described sensor, becomes constant to make output valve; Identify control part, at this correcting value of the output of described sensor compared in the correcting value in past situation jumpy, described identification control part, according to the described correcting value of change, changes described judgment threshold; And true and false judging part, use the described judgment threshold after being changed by described identification control part, judge the true and false of described paper.
Description
Technical field
The sheet paper identification device that the true and false that the present invention relates to a kind of paper to being representative with bank note, security, cash certificate judges.
Background technology
Usually, ATM(AutomaticTellersMachine to the printed article such as bank note, securities processes: automatic depositing-withdrawing device) or the cash transaction device such as the window device being arranged on financial institution's window possess recognition device, this recognition device has the recognition function for judging the true and false of bank note, securities.
Such as, in the paper money recognition of ATM, the single or multiple sensors that recognition device possesses scan the bank note carried in the prescribed direction, and recognition device reads the characteristic of the printed patterns representing bank note.Then, the characteristic of recognition device to the desired region being positioned at bank note implements the computing of regulation, calculates multiple statistic.Check whether this statistic (calculated value) enters in the permissible range of the value (such as higher limit and lower limit) set as the judgment value preset (parameter).And recognition device carries out the result checked, when being judged as entering in set permissible range, being judged as YES genuine note, when being judged as not entering into permissible range, being judged as YES counterfeit money.This higher limit and lower limit are the threshold values of the judgment value for judging forge or true or paper money.
But, in the sensor being equipped on the recognition devices such as bank note, there will be the deviation of sensitivity, caused by external influences such as temperature humidity output level deviation, export variation by the sensors that cause such as deteriorations year in year out.Therefore, consider these deviations and variation, sensor is configured to, and implements sensor calibration, to obtain constant output all the time, compare, carry out true and false judgement with pre-prepd fixing threshold value before work or in work.
As such the output of sensor is corrected after judge the paper transaction system of the true and false of bank note etc., such as in patent documentation 1 there has been proposed a kind of paper transaction system, send paper from collecting storage facility and differentiate, frequency distribution, mean value, standard deviation value is made by the cumulative data based on this identification result, confirm these information, and change the judgment value of cash kind or the true and false.
Patent documentation 1: Japanese Unexamined Patent Publication 2008-15813 publication
The correction of each sensor in recognition device is at a time best correction.Under normal circumstances, this bearing calibration is no problem.But, when carrying out timing and there is the foreign matter such as rubbish or dust, carry out the correction of the impact considering this foreign matter, afterwards, when the foreign matter that timing exists disappears, the value be output into outside imagination of sensor, so depart from from threshold value when judging sometimes, and the judgement that leads to errors.That is, there is such problem: when there is the foreign matter such as rubbish or dust, correct according to the output of this situation to sensor, but afterwards when this foreign matter disappears, the output of sensor also keeps the state of timing, so the output of sensor is non-constant, lead to errors judgement.
Summary of the invention
The present invention makes in view of the foregoing, its object is to, and provides a kind of sheet paper identification device, and when recognizing foreign matter, no matter whether this foreign matter exists, and can both judge with the true and false of constant precision to paper.
In order to solve above-mentioned problem, sheet paper identification device of the present invention, judges the true and false of paper, it is characterized in that, possess: sensor, detects the feature of described paper; Storage part, stores the judgment threshold of the true and false for judging described paper; Correction unit, corrects the output of described sensor, becomes constant to make output valve; Identify control part, at this correcting value of the output of described sensor compared in the correcting value in past situation jumpy, according to the described correcting value of change, change described judgment threshold; And true and false judging part, use the described judgment threshold after being changed by described identification control part, judge the true and false of described paper.
According to the present invention, can provide a kind of sheet paper identification device, when recognizing foreign matter, no matter whether this foreign matter exists, and can both judge with the true and false of constant precision to paper.
Accompanying drawing explanation
Fig. 1 is the figure of the formation of the sheet paper identification device representing the 1st embodiment.
Fig. 2 is the figure of an example of the formation representing linear transducer.
Fig. 3 represents the figure when the production of sheet paper identification device from the signal of the sensor output signal of linear transducer output.
Fig. 4 represents the figure from the signal of the sensor output signal of linear transducer output after sheet paper identification device work.
Fig. 5 is the figure of the example representing the situation that there is foreign matter in the linear transducer shown in Fig. 2.
Fig. 6 represents the figure to the situation that the output of linear transducer corrects when to there is foreign matter in linear transducer.
Fig. 7 is the figure of the correcting value represented for the linear transducer that there is foreign matter.
Fig. 8 is the figure of the relation between the output valve of linear transducer after representing correction and amplitude (true and false judgment threshold).
Fig. 9 is the figure representing the situation of linear transducer being carried out to overcorrect.
Figure 10 is the figure of the example representing the formation correcting scale.
Figure 11 is the figure representing that identification part control program makes true and false judgment threshold change based on correcting value.
Figure 12 represents each element for linear transducer, the part classification comprised is become to judge the figure of the situation of block in the specialized range of main scanning direction.
Figure 13 is the figure of the example representing initial decision block data.
Figure 14 is the figure representing the example changing the situation of the weighting judgment value (mark) judging block according to movement threshold ratio.
Figure 15 is the figure of the formation of the sheet paper identification device representing the 2nd embodiment.
Figure 16 represents that sheet paper identification device uses multiple sensor bank note to be carried out to the figure of the situation of comprehensive descision.
Description of reference numerals
1000,2000 sheet paper identification devices; 10 transport rollers; 11,2011 sensors; 100 sensors; 12 sensor output signals; 13 identify control part; 14CPU; 15 Nonvolatile memory devices; 151 identify control program; 152 true and falses judge control program; 153 initial sensor corrected values; 154 true and falses judge initial threshold; 155 correcting values; 156 initial decision block datas; 16 storeies; 161 bank note data; 162 true and false judgment thresholds; 163 movement threshold ratios; 17 correction signals; 18 bank note transport roads; 20 sensors (linear transducer); After 21 initial calibrations, sensor exports; 30 foreign matters; The correcting value of 31 foreign matter parts; 40 upper limit thresholds; 41 lower thresholds; 42 true and false judgment threshold scopes.
Embodiment
Explain the embodiment of sheet paper identification device of the present invention with reference to the accompanying drawings.Below, for adopt in the financial institutions such as banking system, be such as built in device in the automatic depositing-withdrawing devices such as ATM, sheet paper identification device of the present invention is described.
[embodiment 1]
Fig. 1 is the figure of the formation of the sheet paper identification device 1000 representing the 1st embodiment.As shown in Figure 1, sheet paper identification device 1000 has: transport roller 10, for carrying bank note; Sensor 11, reads the feature of bank note; And identify control part 13, accept the feature based on bank note and the sensor output signal 12 that reads, discriminatings is carried out to the true and false of bank note and processes.
Transport roller 10 is made up of with the lower transport roller of the downside being arranged on transport road 18 in couples the upper transport roller of the upside being arranged on transport road 18, by bank note next for carrying along the carrying of carrying direction.
Sensor 11 has: illuminating part 11b, is configured in the downside of transport road 18; With light accepting part 11a, be configured in the upside of transport road 18.Illuminating part 11b exports transmitted light to light accepting part 11a, and this transmitted light accepts by light accepting part 11a.Light accepting part 11a output transducer output signal 12, this sensor output signal 12 represents the pattern of the transmitted light received.In addition, the sensor usually used in recognition device has optical system imageing sensor, the various sensor of magnetic class sensor, can use in the past known various sensors.
Identify that control part 13 is by resolving above-mentioned sensor output signal 12, carrys out the true and false of identification note.Identify that control part 13 does not just process sensor output signal 12, in order to correct the output of sensor 11, have: CPU(CentralProcessingUnit) 14; For storing, Nonvolatile memory devices 15, identifies that control program 151, the true and false judge that control program 152, initial sensor corrected value 153, the true and false judge initial threshold 154, correcting value 155, initial decision block (block) data 156; Storer 16, processes sensor output signal 12 and takes care of as bank note data temporarily, or true and false judgment threshold 162, the movement threshold ratio 163 during custodianship.The concrete contents processing carried out for these each portions of use will carry out describing later, as hereinafter described, identify that control program 151 mainly performs the output of sensor 11 function corrected and the function changing true and false judgment threshold.
In FIG, bank note is handled upside down roller 10 by sensor 11, the output of sensor 11 was corrected in advance, to obtain constant output, so can read the feature of bank note before bank note is handled upside down to direction of arrow carrying with the speed of regulation.Then, the feature of the bank note read based on sensor 11 and the sensor output signal 12 exported are as bank note data, use CPU14 and storer 16 to process, compare with true and false judgment threshold 162, judge that control program 152 judges the true and false of bank note by the true and false.
Then, use Fig. 2, Fig. 3, Fig. 4, Fig. 5 that the method corrected the output of sensor 11 is described.Fig. 2 is the figure of an example of the formation representing sensor 11.As shown in Figure 2, sensor 11 is formed as linear transducer 20, and this linear transducer 20 has the multiple elements (being set to n element at this) be arranged in a row.Each element of linear transducer 20 is the main scanning direction that the carrying direction in Fig. 1 is orthogonal is arranged.English digital (01 ~ n) shown in Fig. 2 represents the number being used for recognition component.Each element of linear transducer 20 exports the sensor output signal 12 corresponding with the bank note feature that carrying comes.
As the order of sensor calibration, first, as shown in Figure 3, when producing sheet paper identification device 1000, in order to eliminate the deviation of each element of linear transducer 20, identification part control program 151 corrects each element, and exporting 21 with sensor after making initial calibration becomes a certain constant output.And this initial calibration is saved in the Nonvolatile memory devices 15 identified in control part 13 as initial calibration 153 by identification part control program 151.
Fig. 3 represents the figure when producing sheet paper identification device 1000 from the signal of the sensor output signal 12 of sensor 11 output.In figure 3, the longitudinal axis represents sensor output value, and transverse axis represents the detection position (each element) of main scanning direction.Afterwards, when the work of sheet paper identification device 1000, identification part control program 151 is saved in the initial calibration 153 in Nonvolatile memory devices 15 before reading in bank note carrying, and sends correction signal 17 to sensor 11.Like this, export 21 structures identical in each element by sensor after employing initial calibration, the characteristic of fixing bank note can be read at every turn.In addition, for this correction, such as, when sensor 11 is optical system imageing sensor, there is the light reception sensitivity correction etc. of the light amount correction of light source side, photo detector side, but due in the past known various technology can be adopted, so do not describe in detail at this.
Fig. 4 represents the figure from the signal of the sensor output signal 12 of sensor 11 output after sheet paper identification device 1000 works.As shown in Figure 4, even if when causing sensor output signal 12 to reduce as correction front sensor during work exports 22 because of the output deterioration of sensor 11 after work, be corrected to a certain constant output by identification part control program 151.Specifically, identification part control program 151 corrects, and obtains exporting 21 identical outputs with sensor after initial calibration to make correcting rear sensor output 23 during work.Identification part control program 151 is by correcting value (b1, b2 for each element now ... ~ bn) as correcting value 155 record shown in Fig. 1.As described later, this correcting value 155 is recorded in the table (correction scale) shown in Figure 10.Correcting value, at each timing, is recorded to and corrects in scale, with the correcting value in resume form record past, use these correcting values to calculate set statistic (such as mean value), and upgrade by identification part control program 151.In addition, as described later, be recorded in the correcting value corrected in scale resume (such as this, last time, upper inferior number of corrections) can arbitrary decision.
Fig. 5 is the figure of the example represented when to there is foreign matter in the linear transducer 20 shown in Fig. 2.In the example as shown in fig. 5, the situation that there is foreign matter 30 in the element 03 among each element forming linear transducer 20 is shown.In sheet paper identification device 1000, there is following situation: the foreign matters such as rubbish are also handled upside down together in bank note transport road 18, then fall in the bank note transport road 18 at the position being configured with sensor 11.In this case, also as mentioned above, identification part control program 151 corrects when sheet paper identification device 1000 works, to make the output of sensor 11 constant.Specifically, identification part control program 151 corrects, and to make under the state that there is foreign matter, after correcting during work, sensor output 23 obtains exporting 21 identical outputs with sensor after initial calibration.
Fig. 6 represents when having foreign matter 30 like this in linear transducer 20, to the figure of the situation that the output of linear transducer 20 corrects.As shown in Figure 6, owing to there is foreign matter element 03, in order to make the output of sensor 11 constant as sensor after correcting during work exports 23, needing only there is the element 03 of foreign matter 30, when increasing work, correcting the correcting value that front sensor exports 22.
Fig. 7 represents like this to the figure of the correcting value that the linear transducer 20 that there is foreign matter 30 corrects.Identification part control program 151 corrects the output of each element to make the output of sensor 11 constant, and as shown in Figure 7, only have the element 03 that there is foreign matter 30, the correcting value 31 corrected the output of sensor 11 is larger.When working in this condition, when there is foreign matter 30, sensor identical with it can be obtained and export.But, such as, after having carried several bank note, when coming with transport identically, when along with the carrying action of bank note, foreign matter 30 flows to other positions, identification part control program 151 corrects based on the correcting value 31 of the amount considering foreign matter, so be in the state output of this position (being element 03 in the example shown in Fig. 7) too greatly corrected.Therefore, when reading the characteristic of bank note, become and export 21 different output valves from sensor after original initial calibration.
Like this, when state becomes from the situation that there is foreign matter 30 situation that there is not foreign matter 30, the correction carried out the output of sensor 11 is excessive, becomes the main cause of false judgment.Therefore, in the present embodiment, consider the natural deterioration of sensor 11, to the amplitude of the output valve setting regulation of the sensor 11 after correction, as described later, when output valve is converged within the scope of it, the true and false judges that control program 152 judges that bank note is genuine note.
Fig. 8 is the figure of output valve after representing above-mentioned correction and the relation between amplitude (true and false judgment threshold).In the example shown in Fig. 8, be described as follows situation, for the output valve of sensor 11 of characteristic that have read bank note, as the threshold value of conceptually easy understand, SC service ceiling threshold value 40 and lower threshold 41 judge the true and false of bank note.The true and false judges the threshold value (such as higher limit 40 and lower limit 41) of control program 152 to each output information setting regulation that the miscellaneous each sensor from paper money identifier 1000 obtains, if output valve is in the scope of this threshold value, then be judged as genuine note, if output valve beyond the scope of threshold value, is then judged as counterfeit money.In the present embodiment, be described for the element 03 that there is foreign matter 30.
For the true and false judgment threshold 162 be stored in storer 6, identification part control program 151 capping threshold value 40 and lower threshold 41, as the true and false, this upper limit threshold 40 and lower threshold 41 judge that initial threshold 154 is stored in advance in Nonvolatile memory devices 15.And, when sheet paper identification device 1000 works, corrected by identification part control program 151 pairs of sensors 11, to make output constant, then the true and false judges that control program 152 compares the output of the sensor 11 corresponding with the feature of bank note that carrying comes and above-mentioned upper limit threshold 40 and lower threshold 41, judge whether this output is included in true and false judgment threshold scope 42, thus the true and false of the bank note that correctly judges.
But as shown in Fig. 5 ~ Fig. 7, after having carried out correcting to the output of sensor 11 under the state that there is foreign matter 30 in element 03, this foreign matter 30 has no longer been deposited in case, can cause only having this part to be in the state of overcorrect.Fig. 9 represents such figure sensor 11 being carried out to the situation of overcorrect.As shown in Figure 9, after correcting during work, sensor exports 23 and is in overcorrect state at the element 03 that there is foreign matter 30, outside the scope being in true and false judgment threshold scope 42, the true and false judges that control program 152 should be judged as that the bank note false judgment of genuine note is counterfeit money.
For this reason, a kind of structure is provided, identification part control program 151 carries out the true and false judgment threshold 162(upper limit threshold 40 existed in the element 03 of foreign matter 30 and lower threshold 41) process of changing is (that is, for relaxing with making this threshold portion and the process of changing its value), thus, even if after foreign matter 30 disappears, the true and false judges that control program 152 also correctly can carry out genuine note judgement.In addition, identification part control program 151 judges the correcting value corrected the output of the sensor 11 during work, whether change sharp compared to the correcting value in past because of the impact of foreign matter 30, thus determine whether from the true and false, true and false judgment threshold 162 is judged that the value of initial threshold 154 changes.
Figure 10 is the figure of the example representing the formation correcting scale.In correction scale, store the correcting value that the output of each element being formed sensor 11 is corrected according to each element with resume form.As shown in Figure 10, in correction scale, according to each element, by the number for identifying each element be configured on main scanning direction, represent the intensity of variation of the correcting value of each element movement threshold ratio, recently and the correcting value of sensor 11 in the past set up and store accordingly.
In the example shown in Figure 10, sensor 11 is made up of n the element of element 01 ~ n, to the correcting value that the output from each element corrects, nearest correcting value be expressed as successively from element 01 g1, g2 ... gn.Identical therewith, the correcting value of last time be expressed as successively from element 01 j1, j2 ... jn, the correcting value of last time be expressed as successively from element 01 k1, k2 ... kn, the correcting value of upper upper last time be expressed as successively from element 01 m1, m2 ... mn.
Identification part control program 151, with reference to the record of the correcting value of each element in such past, calculates the statistical value (such as mean value) of correcting value, judges whether this correcting value changes significantly compared with the statistical value to last time.And, identification part control program 151 is when being judged as that this correcting value greatly changes compared with the statistical value till last time, being judged as correcting the output of this element because there is sudden foreign matter on that element, changing the true and false judgment threshold 162 for this element.Such as, when this correcting value of the output of sensor 11 is changed to the degree not reaching true and false judgment threshold 162, identification part control program 151 is judged as that the correcting value of the output of sensor 11 sharply changes compared to the correcting value in past, and changes true and false judgment threshold 162 based on this correcting value.
In addition, which kind of degree correcting value changes to, then changes the occurrence of true and false judgment threshold 162 compared with the statistical value till last time, because the output characteristics etc. by sensor 11 affects, so in this indefinite record.But if the deterioration of simple sensor 11, then correcting value slowly changes, if the impact produced by foreign matter, then correcting value sharply changes, so easily judge.
Such as, more close value at the correcting value j3 of the last time of element 03 and the correcting value k3 of last time, and the correcting value m3 of upper upper last time very little compared to these values when, the timing in last time and upper last time can be judged as, under the state that there is foreign matter, the output of element be corrected.On the other hand, the correcting value j3 of the last time of element 03 and the correcting value k3 of last time and on the correcting value m3 of upper last time be close value, and when rising lentamente, can be judged as due to element slowly deterioration and add correcting value.
The amount of change of true and false judgment threshold 162 can be such as the change of the threshold value of each element corresponding with the rate of change of the correcting value shown in following formula.
After changing true and false judgment threshold (i)=true and false judges that initial threshold (i) × (1+ movement threshold ratio (i))
Movement threshold ratio (i)=(this correcting value (i)-last time till statistic (i)) maximal value of ÷ correcting value
Here be (i) each element designation
Like this, identification part control program 151 changes true and false judgment threshold 162 based on correcting value, thus there will not be the true and false to judge control program 152 is judged as the situation of counterfeit money mistakenly when being judged as genuine note.
Figure 11 represents that identification part control program 151 changes the figure of the situation of true and false judgment threshold 162 based on correcting value.As shown in figure 11, after correcting the output of sensor 11 under the state that element 03 exists foreign matter 30, foreign matter 30 is no longer deposited in case, only has this part to become the state of overcorrect.But, identification part control program 151 is only to the true and false judgment threshold 162 of element 03 that once there is foreign matter 30, correspondingly change its threshold value with correcting value and make it relax (improving the upper limit in fig. 11), so sensor output 23 can not outside the scope of true and false judgment threshold scope 42 after correcting during work, the true and false judges that bank note can be judged as genuine note by control program 152 as originally.
In explanation so far, for each element of each sensor 11, the correcting value that corrects is exported compared in the statistical value in past situation jumpy to it, identification part control program 151 is judged as that the foreign matter once existed disappears from this because of mobile grade, and changes threshold value based on correcting value.In this case, linear transducer 20 exists element that because of the impact of foreign matter correcting value increases and, there is no the impact of foreign matter and the element that corrects based on correcting value originally.In the identification of bank note, when the sensor output signal 12 of each element is consistent with the value of the corresponding part of the printed patterns of regulation, this bank note is judged as genuine note, so this point that affects which element receives foreign matter is very important for grasping the feature of bank note.
Therefore, below, be the block (judgement block) be mapped with the printed patterns of bank note by each part classification of formation linear transducer 20, to the weight of sorted judgement Block Set based on the importance degree in printed patterns.Such as, be weighted like this, to the characteristic of bank note be positioned at (such as, comprise the pith of face, the amount of money) judgement block be set to high score, the judgement block being present in the part (such as only including the part of the background patterns of bank note) comparing the feature being difficult to become bank note is set to low point, thus bank note can be identified accurately.
Figure 12 represents each element for linear transducer 20, is the figure of the situation judging block by the part classification be included in the specialized range of main scanning direction.As shown in figure 12, each element of linear transducer 20 is divided into multiple judgement block on main scanning direction.In the example shown in Figure 12, element 00 ~ element 03 is categorized as and judges block A, element 04 ~ element 06 is categorized as and judges block B, element 07 ~ element 08 is categorized as and judges block C, element n-3 ~ element n is categorized as and judges block N, by remaining part classification for judge block X.
Identification part control program 151 is aftermentioned with reference to the initial decision block data 156(be prestored to each Currency Type in Nonvolatile memory devices 15), be judged as the true and false in each judgement block judges it is that very (sensor output signal 12 of each element is in the scope of true and false judgment threshold 162, i.e. genuine note) when, set the mark (weighting judgment value to judge Block Set) corresponding with this judgement block, be judged as that true and false judgement is that (sensor output signal 12 of each element is outside the scope of true and false judgment threshold 162 in vacation, i.e. counterfeit money) when, the mark corresponding with this judgement block is set to nothing.And the fractional value of each judgement block is added by identification part control program 151, when aggregate value is as a whole more than setting, carries out comprehensive descision to this bank note, final judgement is genuine note.
Figure 13 is the figure of the example representing above-mentioned initial decision block data 156.As shown in figure 13, initial decision block data 156 is by above-mentioned judgement block, represents the scope of the element forming each judgement block and the data of the storage that is mapped to the mark that the judgement block of this scope is given.In the example shown in Figure 13, to judging that block A gives 50 points, to judging that block B gives 15 points, to judging that block C gives 20 points, to judging that block X gives 5 points, to judging that block N gives 10 points, entirety is set to 100 points.In this example embodiment, judging that the feature of bank note in block A is comparatively large, be important block.
The feature of bank note is different because of bank note kind and position, so in the present embodiment, multiple judgement blocks of the scope of certain element that is classified as of identification part control program 151 pairs of main scanning directions carry out true and false judgement respectively, and by its results added, thus judge the true and false (comprehensive descision) of whole bank note, in the extraneous situation that one of element comprised in each judgement block is in true and false judgment threshold 162, be judged as counterfeit money.But, also can be judged as counterfeit money based on the quantity of each element comprised in each judgement block.Such as, for the block be made up of 5 elements, in the extraneous situation that multiple element (such as 2 elements) is in true and false judgment threshold 162, identification part control program 151 does not set the mark (nothing) of this block.Like this, the quantity of each element comprised based on each block is judged as counterfeit money, thus the true and false can carrying out bank note more flexibly judges.
In addition, the scope of the block that judge and have the initial value predetermined by the feature of bank note for the weighting judgment value of block, feature detection position changes according to the carrying position of bank note, and the judgement block corresponding with element is often variable.That is, judge that block and weighting judgment value can not be changed from being set before carrying first bank note carrying, but the difference of position of the bank note come according to carrying, the position (i.e. the position of each element) of the judgement block that should identify also changes, so when each carrying bank note, reset the position of the judgement block for element.
In addition, as Fig. 5 ~ illustrated in fig. 11, when changing true and false judgment threshold 162, identification part control program 151 changes the weighting judgment value (mark) to each judgement Block Set based on the above-mentioned movement threshold ratio calculated.Figure 14 is the figure representing the example changing the situation of the weighting judgment value (mark) judging block according to movement threshold ratio.Identification part control program 151 such as uses following formula, the weighting judgment value of the judgement block corresponding with movement threshold ratio element i is (i) deducted according to movement threshold ratio, to the judgement block corresponding with beyond element i, change on the contrary and add to each judgement block the value that weighting judgment value obtains.In the example shown in Figure 14, the weighting judgment value with the judgement block A of element 03 is reduced 10%, other is judged the weighting judgment value of block increases 10%.
The weighting judgment value of the judgement block A corresponding with element i
=judge initial weighting judgment value × (1-movement threshold ratio is (i)) of block A
The weighting judgment value of the judgement block x corresponding with beyond element i
=judge initial weighting judgment value × (1+ movement threshold ratio is (i)) of block x
At this, " x " is the judgement block symbol (B, C etc.) beyond element i
Like this, identification part control program 151 when judging the true and false of (comprehensive descision) bank note entirety, by paper money zone blocking, for each block, after changing weighting judgment value, judge each value respectively whether in threshold value, its result is comprehensive, and the true and false of carrying out bank note judges.Therefore, even if after having carried out correcting to linear transducer 20 under the state that there is foreign matter before work, foreign matter no longer exists at work, and the sensor of linear transducer 20 exports when changing, and also can the threshold value of the setting by making condition relax to correctly judge the true and false of bank note.In addition, identification part control program 151 is slightly blocking by the position of bank note, on the basis at position identifying the threshold value by relaxing setting, change for after the weight (reliability) judged, the true and false of each block being carried out to bank note judges, thus can reduce the erroneous judgement rate based on the threshold value relaxed.
The correction process described in the present embodiment, as long as (when such as sheet paper identification device 1000 starts) implements once before carrying carrys out bank note, afterwards without the need to carrying out correction process, so the processing load often opening bank note can be alleviated whenever carrying bank note.Therefore, it is possible to provide a kind of identifying processing, can not additional load when paper money recognition process (usually, the true and false that sheet paper identification device 1000 carries out judges process etc.) of each bank note, be not vulnerable to the impact caused by foreign matter.
In addition, in the present embodiment, (i) distribute judgement block to whole element, but only can judge block to the element of certain scope (such as, face, the amount of money etc. are for part and parcel the true and false of bank note judges) distribution.Like this, judging block by distributing, can judge more simply to process the true and false of carrying out bank note.
In addition, in the present embodiment, for linear transducer 20, carry out the comprehensive descision of bank note, but do not limit as the quantity of the sensor of the object of this comprehensive descision, multiple comprehensive descision can be carried out to a sensor.Now, change the correction process of the weight threshold of each judgement block without the need to adopting as described above threshold value mitigation to whole comprehensive descision, such as also can for certain sensor, do not relax threshold value and carry out true and false judgement according to mode in the past.
Like this, a kind of framework is provided in the present embodiment, identification control program 151 identifies exists foreign matter at the timing of the output of sensor 11, change the true and false judgment threshold 162 that (mitigation) exists the position of foreign matter, all can judging with/without during foreign matter, in addition, when only true and false judgment threshold 162 being relaxed, the possibility of false judgment is higher, so be divided into block to judge according to each position, the true and false judges that control program 152 carries out comprehensive descision based on adding of the mark for each block.And, identify that control program 151 changes the weighting judgment value of each block, there is foreign matter and to reduce mark in the block relaxed by true and false judgment threshold 162, and improve the mark of block in addition.That is, be judged as mark reliability of equal value, reduce the disturbance degree of the false judgment to bank note, the correction of the impact considering sudden foreign matter can be realized, the lower true and false of false judgment rate can be realized and judge process.
[embodiment 2]
Describe the formation that sheet paper identification device has a linear transducer in the above-described first embodiment.But, such as, according to the difference of country, have counterfeit money many or forge the more situation of fine craftsmanship, bank note that dirty degree is higher, and the difference of circulation style according to bank note, sometimes also need the situation that the true and false of carrying out bank note judges.So, in light of this situation, such example is described in the present embodiment, it is not a sensor, using the output information of multiple sensor as a group process, the judgement that the correction process of certain sensor is affected and the judgement block interlock of other sensors, judge as the true and false, multiple sensor information judged as a block.
Figure 15 is the figure of the formation of the sheet paper identification device 2000 representing the 2nd embodiment.As shown in figure 15, except the formation that sheet paper identification device 2000 is identical except each portion possessed with the sheet paper identification device 1000 of the 1st embodiment has, also there is sensor 2011 and sensor 100, different from the sheet paper identification device 1000 of the 1st embodiment in this.In the following description, identical to the 1st embodiment with above-mentioned composed component is given identical symbol and omits the description.In addition, for from Fig. 2 to the correction process of sensor illustrated in fig. 11, also identical with the situation of the 1st embodiment, so omit this explanation.
In fig .15, multiple sensor forms and judges block processes as one by sheet paper identification device 2000, and the true and false of carrying out bank note judges.In the 1st embodiment, the position that each element of formation sensor (linear transducer 20) gathers is become multiple judgement block as a unit, to each judgement Block Set weighting judgment value, carry out the comprehensive descision of bank note.But in the present embodiment, sheet paper identification device 2000 uses multiple sensor to carry out the comprehensive descision of bank note.Sensor 2011 and sensor 100 are the featured configuration had based on bank note.Such as, sensor 2011 is imageing sensors, and sensor 100 is Magnetic Sensors.The following describes the situation of use 2 sensors, more than 3 can certainly be used, multiple sensors carries out comprehensive descision.Then, the comprehensive descision using each sensor to carry out is described.
Figure 16 represents that sheet paper identification device 2000 uses multiple sensor to carry out the figure of the situation of comprehensive descision bank note.As shown in figure 16, in sheet paper identification device 2000, multiple judgement block is mapped with sensor 2011, other multiple judgement blocks different from sensor 2011 are mapped with sensor 100, to these set overall weighting judgment value.In the example shown in Figure 16, the main scanning direction of each sensor has 4 blocks judging block Q, R, T, U, identical with the initial decision block data (Figure 13) illustrated in the 1st embodiment, each judgement block integral of 2 sensors is set to 100 points.Known in this example embodiment, judge that block Q is the larger and important block of the feature of bank note.Like this, use multiple different sensor to carry out true and false judgement according to the feature of bank note, thus the suitable judgement corresponding with this position can be carried out.Such as, the image of sensor 2011 pairs of face parts scans, and judges the true and false of this part, for pattern part, reads magnetic pattern etc. by sensor 100, and based on each position that each judgement block with bank note is corresponding, the bank note carrying out conforming to judges.
Identical with the situation of the 1st embodiment, foreign matter is there is at the position of the judgement block Q of sensor 11, when change sharply occurs the correcting value of sensor 11, identification part control program 151, according to movement threshold ratio, deducts the weighting judgment value judging block Q.On the other hand, identification part control program 151, for judgement block (judging block R, T, U) in addition, changes on the contrary and has been added to each judgement block the value that weighting judgment value obtains.For the setting of such weighting judgment value, identical with situation about illustrating in the 1st embodiment.
Like this, judge that block T, U are not sensors 2011, but other sensors corresponding from other different sensors 100, but be defined as a block as a whole, object as identical comprehensive descision processes, and relates to multiple sensor, changes the weighting judgment value of each judgement block, thus the information of the impact of foreign matter and multiple sensor is associating, the comprehensive descision of bank note can be carried out.
In addition, the invention is not restricted to the embodiments described, comprises various variation.Such as, the above embodiments describe in detail for the ease of understanding the present invention, are not limited to possess illustrated entire infrastructure.In addition, also a part for the formation of certain embodiment can be replaced to the formation of other embodiments, in addition, also can by combined to the formation of certain embodiment and other embodiments.In addition, for a part for the formation of each embodiment, also can carry out other additional deletions formed and replace.In addition, in the above-described embodiments, describe the example of the paper money identifier being applicable to ATM, the present invention not only may be used for the paper money recognition unit identifying bank note, can also be applicable to the device of the paper (such as, the little bank note etc. cutting hand, card certificate, Swam skill machine) processed beyond bank note.
Claims (13)
1. a sheet paper identification device, judges the true and false of paper, and this sheet paper identification device possesses:
Sensor, detects the feature of described paper;
Storage part, stores the judgment threshold of the true and false for judging described paper; And
Correction unit, corrects the output of described sensor, becomes constant to make output valve;
The feature of this sheet paper identification device is also possess:
Identify control part, at this correcting value of the output of described sensor compared in the correcting value in past situation jumpy, described identification control part, according to the described correcting value of change, changes described judgment threshold; And
True and false judging part, uses the described judgment threshold after being changed by described identification control part, judges the true and false of described paper.
2. sheet paper identification device as claimed in claim 1, is characterized in that,
Described storage part stores the correcting value in described past in the mode of resume,
Described identification control part is based on the correcting value in the described past stored in the mode of resume, calculate the statistical value of described correcting value, and the described statistical value calculated and this correcting value are compared, thus judge whether this correcting value of the output of described sensor there occurs change sharply compared to the correcting value in past.
3. sheet paper identification device as claimed in claim 2, is characterized in that,
Described identification control part is based on described statistical value and this correcting value, and calculate the variable quantity representing the degree that described judgment threshold is changed, the described variable quantity according to calculating changes described judgment threshold.
4. sheet paper identification device as claimed in claim 3, is characterized in that,
When this correcting value of the output of described sensor is changed to the degree not meeting described judgment threshold, described identification control part is judged as that the correcting value of the output of described sensor sharply changes compared to the correcting value in past, changes described judgment threshold according to described correcting value.
5. sheet paper identification device as claimed in claim 4, is characterized in that,
Described judgment threshold stores as the specialized range with higher limit and lower limit by described storage part,
When the output valve of described sensor is not included in described scope, described identification judging part changes described judgment threshold according to described correcting value.
6. sheet paper identification device as claimed in claim 5, is characterized in that,
Described sensor is the linear transducer with multiple element,
Described judgment threshold stores according to each described element,
Described correction unit corrects according to the output of each described element to described sensor,
For each described element, at this correcting value of the output of described sensor compared in the correcting value in past situation jumpy, described identification control part changes described judgment threshold according to the described correcting value of change,
Described true and false judging part uses the described judgment threshold changed each described element to judge the true and false of described paper.
7. sheet paper identification device as claimed in claim 6, is characterized in that,
Described storage part is memory block data also, described block data to described paper being divided into the block at multiple position and setting up corresponding relation according to the importance degree mark of the characteristics determined of the described paper be included in described position,
Described true and false judging part judges the true and false of described paper to each described block, based on the judged result of each described block, judge whether to give described importance degree mark to each position of described paper, based on the aggregate value of given described importance degree mark, carry out the true and false of paper described in comprehensive descision.
8. sheet paper identification device as claimed in claim 7, is characterized in that,
Described identification control part makes described importance degree mark increase and decrease according to the change of described correcting value.
9. sheet paper identification device as claimed in claim 8, is characterized in that,
Be judged as that, in the extraneous situation of the output signal of described sensor at described judgment threshold, described identification control part is judged as not giving described importance degree mark.
10. sheet paper identification device as claimed in claim 9, is characterized in that,
Described block is made up of multiple element,
Described identification control part according among the described element comprised in described block, the output signal of described sensor is the quantity of the extraneous element of described judgment threshold, judge whether to give described importance degree mark.
11. sheet paper identification devices as claimed in claim 10, is characterized in that,
Described block is only arranged on the position of the key character representing described paper.
12. sheet paper identification devices as claimed in claim 11, is characterized in that,
Described sheet paper identification device possesses the characteristic had according to described paper and the multiple described sensor arranged,
Described identification control part changes described judgment threshold to sensor described in each,
Described true and false judging part uses the described judgment threshold after changing sensor described in each, judges the true and false of described paper.
13. sheet paper identification devices as claimed in claim 12, is characterized in that,
Described storage part also stores overall block data, and the described importance degree mark comprised in the overall block of each block of multiple described sensor and described overall block is mapped by described overall block data,
Described true and false judging part judges the true and false of described paper to each described block, based on the judged result of each described block, judge whether to give described importance degree mark to each position of described paper, with described overall block for object, based on the aggregate value of given described importance degree mark, carry out the true and false of paper described in comprehensive descision.
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| Application Number | Priority Date | Filing Date | Title |
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| JP2011-280290 | 2011-12-21 | ||
| JP2011280290A JP5645271B2 (en) | 2011-12-21 | 2011-12-21 | Paper sheet identification device |
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| CN103177499A CN103177499A (en) | 2013-06-26 |
| CN103177499B true CN103177499B (en) | 2015-12-09 |
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| CN201210505508.8A Expired - Fee Related CN103177499B (en) | 2011-12-21 | 2012-11-30 | Sheet paper identification device |
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| JP (1) | JP5645271B2 (en) |
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| EP2922036B1 (en) * | 2012-11-14 | 2018-12-26 | Mitsubishi Electric Corporation | Signal processing device, signal processing method and information reading apparatus |
| CN103903326B (en) * | 2014-03-03 | 2016-07-06 | 广州科珥光电科技有限公司 | Multispectral counterfeit money detection system and detection method thereof |
| CN104183054B (en) * | 2014-07-29 | 2016-04-06 | 苏州佳世达光电有限公司 | Image identification device |
| CN104754374B (en) * | 2015-04-03 | 2018-06-26 | 北京奇虎科技有限公司 | Audio-video document detection management method and device |
| CN105139516A (en) * | 2015-08-26 | 2015-12-09 | 上海古鳌电子科技股份有限公司 | Paper broken degree identification structure and bill transaction device |
| CN105118140B (en) * | 2015-09-02 | 2018-11-27 | 昆山古鳌电子机械有限公司 | Sheet paper identification device |
| CN105701904B (en) * | 2015-12-29 | 2018-03-30 | 威海华菱光电股份有限公司 | Magnetic image sensor |
| CN105825576B (en) * | 2016-03-11 | 2019-08-27 | 深圳怡化电脑股份有限公司 | A kind of the card paper money method for early warning and system of withdrawal equipment |
| JP2018144989A (en) * | 2017-03-08 | 2018-09-20 | グローリー株式会社 | Paper sheet processing unit |
| EP3503046B1 (en) * | 2017-12-22 | 2020-10-14 | CI Tech Sensors AG | System comprising a processing device and a connected camera, for detecting of a machine-readable security feature of a valuable document and method for exchanging a camera in such a system |
| JP7134435B2 (en) | 2019-03-14 | 2022-09-12 | ローレルバンクマシン株式会社 | Paper sheet detection device, paper sheet detection method, and paper sheet processing device |
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| CN101727696A (en) * | 2008-10-23 | 2010-06-09 | 光荣株式会社 | Method and apparatus for determining authenticity |
| CN101996433A (en) * | 2010-09-21 | 2011-03-30 | 广州广电运通金融电子股份有限公司 | Thickness identification device of slice-type medium and identification method thereof |
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| JP5645271B2 (en) | 2014-12-24 |
| JP2013131053A (en) | 2013-07-04 |
| WO2013094285A1 (en) | 2013-06-27 |
| CN103177499A (en) | 2013-06-26 |
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