CN108010185B - A kind of the detection identification device and method of banknote thickness abnormity - Google Patents
A kind of the detection identification device and method of banknote thickness abnormity Download PDFInfo
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- CN108010185B CN108010185B CN201711237100.6A CN201711237100A CN108010185B CN 108010185 B CN108010185 B CN 108010185B CN 201711237100 A CN201711237100 A CN 201711237100A CN 108010185 B CN108010185 B CN 108010185B
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- sensor
- bank note
- gap
- moving axis
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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
- G07D7/16—Testing the dimensions
- G07D7/164—Thickness
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- General Physics & Mathematics (AREA)
- Inspection Of Paper Currency And Valuable Securities (AREA)
Abstract
The present invention relates to a kind of detection identification devices of banknote thickness abnormity, connect bank note conveying mechanism, and bank note conveying mechanism includes the dead axle and moving axis of the upper and lower conveying bank note that cooperates, and the side plate of installation dead axle and moving axis；Detection identification device includes the sensor installing platform part being mounted on side plate, the first sensor of detection bank note conveying mechanism and moving axis vibration, the second sensor of detection bank note conveying mechanism vibration, data transfer segment, MICROCOMPUTER PROCESSING part；First sensor and second sensor are installed in sensor installing platform part, the vibration signal that first sensor and second sensor acquire is transmitted to MICROCOMPUTER PROCESSING part by data transfer segment, and MICROCOMPUTER PROCESSING part is calculated and identified automatically according to the spacing between crest value and wave crest.Further relate to a kind of detection recognition method of banknote thickness abnormity.The present invention examine it is pseudo- at low cost, it is easy for installation, using simple, belong to paper currency detection technical field.
Description
Technical field
The present invention relates to paper currency detection technologies, and in particular to the detection identification of the banknote thickness abnormity of currency counting and detecting machine and cleaning-sorting machine
Device and method.
Background technique
In daily life and business activity, since bank note is easy the paper impaired, people will often be damaged in the field of circulation
It is continued to use after the thin tape-stripping of coin.Further, since (one kind of counterfeit money, this counterfeit money often use glue for the appearance of technique of composite-RMB bank note
Item connection, or overlapping are pasted), therefore financial department needs to distinguish these paper currency detections in bank note management.Past
It is that sorting is carried out by mechanical measuring thickness device, broken bank note and counterfeit money that sorting goes out is recycled.This mechanical survey
Thick device is that the roller that is oppositely arranged using two carries out thickness measuring to bank note in a contact fashion, by two rollers it is mechanical away from
Thickness from reaction bank note, since mechanical measuring thickness device structure is more complicated, and must contact just be capable of measuring with bank note.
Later, people used acceleration transducer and design thickness measuring system, by the acceleration for measuring counting machine vibration signal
It is excessively complicated to solve the problems, such as measuring thickness device structure to judge the thickness of bank note for angle value, but very due to paste
It is thin, if transparent tape thickness only has 0.1mm or so, with acceleration transducer come thickness measuring, it is difficult to ensure that the accuracy measured, thus
There is a problem of that poor reliability, omission factor are high and precision is low.
Existing bank note conveying mechanism, is mounted in the equipment such as paper money counter, cash inspecting machine, cleaning-sorting machine, including two are mounted on
The rolling axle of side sheet room, one is dead axle, is located above, and one is moving axis, is located below, and when original state, compacting part will
Moving axis presses to dead axle, and when bank note passes through, moving axis is slightly moved down, and after bank note passes through, moving axis is reset under the action of compacting part
Initial position.
Summary of the invention
For the technical problems in the prior art, the object of the present invention is to provide it is a kind of in a non contact fashion quickly,
Accurately measure the detection identification device and method of the banknote thickness abnormity of banknote thickness.
In order to achieve the above object, the present invention adopts the following technical scheme:
A kind of detection identification device of banknote thickness abnormity, connects bank note conveying mechanism, and bank note conveying mechanism includes up and down
It cooperates and conveys the dead axle and moving axis of bank note, and the side plate of installation dead axle and moving axis；Detection identification device includes being mounted on
First sensor, the detection bank note of sensor installing platform part, detection bank note conveying mechanism and moving axis vibration on side plate are defeated
Send second sensor, the data transfer segment, MICROCOMPUTER PROCESSING part of mechanism vibrations；First sensor and second sensor are respectively mounted
In sensor installing platform part, the vibration signal that first sensor and second sensor acquire is transmitted to by data transfer segment
MICROCOMPUTER PROCESSING part, MICROCOMPUTER PROCESSING part are calculated and are identified automatically according to the spacing between crest value and wave crest.
As a preference, sensor installing platform part includes iron plate and iron block, iron block, iron plate, side plate from outer side to
Inside successively connects；The middle part of iron plate is equipped with horizontal gap, and the wherein one end in gap extends to the edge of iron plate, in gap
Portion is equipped with the through-hole passed through for the end of moving axis；The middle part of iron block is equipped with the through-hole passed through for the end of moving axis；First sensor
It is mounted on iron plate above and is located at the upside in gap, second sensor is mounted on iron plate above and is located at the downside in gap.
As a preference, the end at the edge for extending to iron plate in gap is equipped with a rectangular notch, the width of notch
Degree is greater than the width in gap.
As a preference, the installation site of first sensor is located at the surface of notch, the installation position of second sensor
Setting in the underface of notch, two installation sites are aligned in the up-down direction.
As a preference, first sensor to gap center line distance be dA, second sensor is into gap
The distance of heart line is dB, dA: dB=1:3.
As a preference, the tie point of iron plate and side plate is located at the downside in gap.
As a preference, MICROCOMPUTER PROCESSING part is poor equipped with the signal progress for measuring first sensor and second sensor
Divide the software of processing, and finally shows recognition result on a display screen.
As a preference, the width in gap is 0.15cm, the side length of notch is 0.5cm.
A kind of detection recognition method of banknote thickness abnormity uses a kind of detection identification device of banknote thickness abnormity, paper
After coin passes through, moving axis resets, and the upside of moving axis end drives iron block and iron plate vibration, and first sensor measures bank note conveying mechanism
With moving axis vibration signal, second sensor measures bank note conveying mechanism vibration signal, and two groups of signals are reached through data transfer segment
MICROCOMPUTER PROCESSING part carries out difference processing to signal by software, judges whether banknote thickness is normal.
As a preference, the vibration of moving axis is isolated with second sensor in gap.
Generally speaking, reinforce bank note inspection puppet the present invention has the advantage that having, improve sensor accuracy, improve bank note
Thickness abnormity detectability realizes software difference processing including data transfer segment, MICROCOMPUTER PROCESSING part known to the present invention
Part and banknote thickness abnormity differentiate part, complete two big functions: difference noise reduction data processing function and bank note discrimination function,
Data are handled according to software difference algorithm, differentiate banknote thickness whether abnormal function.In a word:
1. possessing sensor installing platform part, and the installation point determined.
2. software difference processing noise reduction is carried out in MICROCOMPUTER PROCESSING part automatically.
3. inspection is pseudo- at low cost, easy for installation, using simple.
4. need to only be installed additional in existing equipment.
Detailed description of the invention
Fig. 1 is the installation diagram of the present invention with bank note conveying mechanism.
Fig. 2 is the side view of Fig. 1.
Fig. 3 is test waveform explanation figure.
Fig. 4 is software differential effect figure.
Fig. 5 is banknote thickness abnormity discriminating program flow chart.
Wherein, 1 is iron plate, and 2 be iron block, and 3 be gap, and 4 be notch, and 5 be moving axis, and 6 be side plate, and 7 be first sensor
Installation site, 8 be the installation site of second sensor, and 9 be the tie point of iron plate and side plate, and 10 be bank note, and 11 be paste, A-
D corresponds to paste edge.
Specific embodiment
It is next below that the present invention will be further described in detail.
A kind of detection identification device of banknote thickness abnormity, including be mounted on side plate sensor installing platform part,
Detect the first sensor of bank note conveying mechanism and moving axis vibration, second sensor, the data of detection bank note conveying mechanism vibration
Translator unit, MICROCOMPUTER PROCESSING part.The bank note conveying mechanism of identification device connection paper money counter is detected, bank note conveying mechanism includes upper
The dead axle and moving axis of the lower conveying bank note that cooperates, and two blocks of side plates of installation dead axle and moving axis, moving axis pass through compacting part
It is close to dead axle.
Sensor installing platform part includes iron plate and iron block, and iron block, iron plate, side plate outside-in successively connect；
The middle part of iron plate is equipped with horizontal gap, and the wherein one end in gap extends to the edge of iron plate, and the middle part in gap is equipped with for moving axis
The through-hole that passes through of end；The middle part of iron block is equipped with the through-hole passed through for the end of moving axis.The edge for extending to iron plate in gap
End be equipped with a rectangular notch, the width of notch is greater than the width in gap.The installation site of first sensor, which is located at, cuts
The surface of mouth, the installation site of second sensor are located at the underface of notch, and two installation sites are aligned in the up-down direction.
First sensor to gap center line distance be dA, the distance of the center line of second sensor to gap is dB, dA: dB=
1:3.The tie point of iron plate and side plate is located at the downside in gap.First sensor and second sensor respectively with data transfer segment
Connect, data transfer segment connects with MICROCOMPUTER PROCESSING part.
Specifically in the present embodiment, first sensor and second sensor use acceleration transducer ADXL335 chip,
Bandwidth range X-axis and Y-axis can achieve 0.5Hz to 1600Hz, and the bandwidth range of Z axis can achieve 0.5Hz to 550Hz.Data
Translator unit is Agilent data collecting card U2331A, can acquire the input of 6 road signal voltages simultaneously, ensure that two sensings
The X of device, Y, Z axis signal can smoothly send to microsystem and be handled.It is matching used that there are also the Agilent numbers being located on microcomputer
It, can be with the collected letter of data collecting card under acquisition and recording according to acquisition software Agilent measurement manager 2.2
Number, and automatically generate Excel document and be conveniently further processed.In the present embodiment, the processing software of microsystem uses
Matlab programmed process difference algorithm, and provide result conclusion.
It needs to carry out gluing treatment to bank note.Prepare gummed paper first, is cut into elongate in shape, gummed paper is pasted onto be detected
On bank note.In the present embodiment, the method that selection gummed paper is laterally pasted, is fabricated to sample to be tested bank note.Such embodiment party
Case be in order to simulate in actual life, someone using genuine notes and counterfeit money splicing paste, come out-trick bank's paper money counter the phenomenon that.It needs
Using in the present invention acceleration transducer and algorithm combine, analog sample is identified, finally on the data waveform
The wave character pasted out, and problem bank note is chosen with this.
The device installation of the present embodiment is described below:
Sensor installing platform part and experiment paper money counter are carried out installation splicing by the first step.
Sensor installing platform part is constituted for one with a thickness of the iron plate of 0.8cm.There is one in the middle part of the side of iron plate
The rectangular notch of 0.5cm cuts the gap that a width is 0.15cm, thus gap with the center of notch among iron plate
The upper side and lower side separate without being fully disconnected.Iron plate intermediate gap position, cut a diameter is counting motorized shaft end
The through-hole of diameter, moving axis are pierced by from the through-hole, utilize the side of the same diameter through hole of an Intermediate Gray with a thickness of 0.8cm
Shape iron block, iron block and side plate are fixed up, it is ensured that the vibration signal of moving axis can be transmitted on iron block.On iron plate under gap
There are 2 hex nuts in side respectively, cooperates two screws to fix iron block and side plate, which ensures that iron block and sensors and point
The relative position of paper money machine fuselage is determined.
Sensor is installed on sensor installing platform part by second step.
Sensor using two ADXL335 chips as acceleration analysis vibration signal.ADXL335 module shares 5
Interface is V+, GND, Xout, Yout, Zout respectively, picks out 3 signal wires respectively, is connected to Agilent data by port
On the hub of capture card, it is used for transmission signal.Chip module is fixed on iron plate with AB glue, by sensors X axis side when fixed
To being adjusted to vertical direction, and towards upward, this standard is set in order to guarantee the data that detected with reference to property.It is fixed to pass
When sensor, first sensor is located at right above notch, remembers that the center line distance in first sensor and gap is dA；Second sensor
Positioned at the underface of notch, remember that the center line distance in second sensor and gap is dB。dAWith dBMeet proportionate relationship are as follows: 1:3,
According to the transmitting of vibration signal, first sensor and second sensor are set, so that first sensor collects paper money counter body
With the vibration signal of bank note, second sensor only acquires body vibration signal, does software difference processing with this basis, can be fine
Ground eliminates paper money counter itself and vibrates brought noise, achievees the purpose that noise reduction.Outside embodiment of the present invention, which can
To be any other vibrating sensor.
Specific implementation operation is described below
The first step initializes pilot system.By the end V+ of sensor, lead is picked out respectively with the end GND first, is coupled with
5V power port and ground port, it is ensured that sensor is enabled, normal operating conditions；Secondly, opening the string of Agilent on microcomputer end
Mouth reads software Agilent measurement manager 2.2, sets data storing path, bit rate is set as
5500, it is ensured that collecting work is ready.
Bank note to be tested is put into paper money counter by second step, makes its normal work, crosses paper money twists paper money, while guaranteeing Agilent
It acquiring port to work normally, collects vibration data and saved at microcomputer end, Agilent acquisition software generates execl file,
It prepares for the processing of next step software.
Third step writes synchronous calibration algorithm and software difference algorithm program using matlab.The specific reality of software difference
It is as follows to apply program circuit:
Acceleration is carried out according to high-speed rotating machine model of vibration to be calculated.
High-speed rotating machine model of vibration.High-speed rotating machine model of vibration is as follows:
Again by resultant force Acceleration Formula
Since the vibration acceleration of first sensor includes that body itself vibrates a body and a bank note signal:
aA=aBody+λaBank note signal
Since the vibration acceleration of second sensor only includes body:
aB=aBody
In above-mentioned formula, the corresponding parameter of letter is:
aA: refer to the vibration acceleration value that first sensor measures；aB: refer to the vibration acceleration value that second sensor measures；
aIt closes: refer to the resultant acceleration for three direction vibration accelerations that sensor measures；ax: refer to that sensor measures vibration signal in x-axis side
Upward acceleration；ay: refer to that sensor measures the acceleration of vibration signal in the y-axis direction；az: refer to that sensor measures vibration letter
Acceleration number in the z-axis direction；X: refer to the vibration displacement of moving axis location point；ω: refer to the angular speed of moving axis position；A: refer to moving axis
The amplitude of model of vibration；Refer to the phase of moving axis model of vibration.
The acceleration a that sensor is measured in microcomputerAWith acceleration aBIt is poor to carry out software work, wherein since there are two
Sensor exports stationary problem, and software is needed to compare reference point, and the effect of the reference point is in alignment with first sensor and second and passes
The output signal of sensor.Software is translated, synchronous two pass by comparing the value that first crest value is more than the threshold value moment by waveform
The data of sensor carry out software work difference later and obtain the acceleration vibrational waveform after noise reduction.Obtain the acceleration vibrational waveform
Afterwards, software judges wave crest virtual value size, distinguishes the case where crest value is greater than threshold value automatically.
In the present embodiment, bank note has laterally been pasted two strips, and width is the electrical adhesive tape of 1cm, crosses counting
When machine, the waveform diagram that processing obtains is passed through by the vibration signal that sensor measurement goes out.As seen from the figure, A tape edge corresponds to wave
Rising edge wave crest at A in shape figure；B tape edge corresponds to failing edge wave crest at the B in waveform diagram；C tape edge corresponds to
Rising edge wave crest at C in waveform diagram；D tape edge corresponds to failing edge wave crest at the D in waveform diagram.Due to being dropped by difference
It makes an uproar, in waveform diagram, peak condition distinguishes very well with noise peak, therefore threshold value is arranged, and is judged.
Within the scope of certain time (one banknote crosses paper money time), if occurring being greater than 2 wave crests for exceeding threshold range,
It is abnormal to may determine that the banknote thickness occurs, there is the appearance of the case where pasting and folding, using program flow diagram, designs program and is stored in
In microcomputer.
The above embodiment is a preferred embodiment of the present invention, but embodiments of the present invention are not by above-described embodiment
Limitation, other any changes, modifications, substitutions, combinations, simplifications made without departing from the spirit and principles of the present invention,
It should be equivalent substitute mode, be included within the scope of the present invention.
Claims (9)
1. a kind of detection identification device of banknote thickness abnormity, connects bank note conveying mechanism, bank note conveying mechanism includes phase up and down
The mutually dead axle and moving axis of cooperation conveying bank note, and the side plate of installation dead axle and moving axis, it is characterised in that: detection identification device packet
Include the sensor installing platform part being mounted on side plate, the first sensor of detection bank note conveying mechanism and moving axis vibration, inspection
Survey second sensor, the data transfer segment, MICROCOMPUTER PROCESSING part of the vibration of bank note conveying mechanism；First sensor and the second sensing
Device is installed in sensor installing platform part, and data transfer segment believes the vibration that first sensor and second sensor acquire
Number it is transmitted to MICROCOMPUTER PROCESSING part, MICROCOMPUTER PROCESSING part is calculated and known automatically according to the spacing between crest value and wave crest
Not；
Sensor installing platform part includes iron plate and iron block, and iron block, iron plate, side plate outside-in successively connect；Iron plate
Middle part be equipped with horizontal gap, the wherein one end in gap extends to the edge of iron plate, and the middle part in gap is equipped with the end for moving axis
The through-hole that portion passes through；The middle part of iron block is equipped with the through-hole passed through for the end of moving axis；First sensor is mounted on iron plate above and position
In the upside in gap, second sensor is mounted on iron plate above and is located at the downside in gap.
2. a kind of detection identification device of banknote thickness abnormity described in accordance with the claim 1, it is characterised in that: the extension in gap
It is equipped with a rectangular notch to the end at the edge of iron plate, the width of notch is greater than the width in gap.
3. the detection identification device of a kind of banknote thickness abnormity according to claim 2, it is characterised in that: first sensor
Installation site be located at the surface of notch, the installation site of second sensor is located at the underface of notch, two installation sites
It is aligned in the up-down direction.
4. a kind of detection identification device of banknote thickness abnormity described in accordance with the claim 3, it is characterised in that: first sensor
Distance to the center line in gap is dA, the distance of the center line of second sensor to gap is dB, dA: dBRelationship be 1:3.
5. a kind of detection identification device of banknote thickness abnormity described in accordance with the claim 1, it is characterised in that: iron plate and side plate
Tie point be located at the downside in gap.
6. a kind of detection identification device of banknote thickness abnormity described in accordance with the claim 1, it is characterised in that: MICROCOMPUTER PROCESSING portion
Packing has the signal for measuring first sensor and second sensor to carry out the software of difference processing, and finally recognition result exists
It is shown on display screen.
7. the detection identification device of a kind of banknote thickness abnormity according to claim 2, it is characterised in that: the width in gap
For 0.15cm, the side length of notch is 0.5cm.
8. a kind of detection recognition method of banknote thickness abnormity uses a kind of thickness of bank note described in any one of any one of claims 1 to 77
Spend abnormal detection identification device, it is characterised in that: after bank note passes through, moving axis resets, the upside of moving axis end drive iron block and
Iron plate vibration, first sensor measure bank note conveying mechanism and moving axis vibration signal, and second sensor measures bank note conveying mechanism
Vibration signal, two groups of signals reach MICROCOMPUTER PROCESSING part through data transfer segment, carry out difference processing, judgement to signal by software
Whether banknote thickness is normal.
9. a kind of detection recognition method of banknote thickness abnormity according to claim 8, it is characterised in that: gap is by moving axis
Vibration be isolated with second sensor.
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| CN201711237100.6A CN108010185B (en) | 2017-11-30 | 2017-11-30 | A kind of the detection identification device and method of banknote thickness abnormity |
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| CN108010185B true CN108010185B (en) | 2019-08-13 |
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| CN103177502A (en) * | 2011-12-20 | 2013-06-26 | 上海古鳌电子科技股份有限公司 | Note thickness measurement device in note sorter and measurement method thereof |
| CN105069897A (en) * | 2015-08-28 | 2015-11-18 | 上海古鳌电子科技股份有限公司 | Bill thickness detecting device |
| CN106296971A (en) * | 2016-08-31 | 2017-01-04 | 东方通信股份有限公司 | A kind of note surface paste high precision test identification system and method |
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- 2017-11-30 CN CN201711237100.6A patent/CN108010185B/en active Active
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| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| US5678678A (en) * | 1995-06-05 | 1997-10-21 | Mars Incorporated | Apparatus for measuring the profile of documents |
| CN103177502A (en) * | 2011-12-20 | 2013-06-26 | 上海古鳌电子科技股份有限公司 | Note thickness measurement device in note sorter and measurement method thereof |
| CN103136842A (en) * | 2013-01-29 | 2013-06-05 | 广州广电运通金融电子股份有限公司 | Thickness measurement device for sheet-type medium |
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