CN105321253B - Photoelectric detection system and method based on adhesive tape on laser reflection identification banknote - Google Patents
Photoelectric detection system and method based on adhesive tape on laser reflection identification banknote Download PDFInfo
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- CN105321253B CN105321253B CN201510680824.2A CN201510680824A CN105321253B CN 105321253 B CN105321253 B CN 105321253B CN 201510680824 A CN201510680824 A CN 201510680824A CN 105321253 B CN105321253 B CN 105321253B
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- 238000001514 detection method Methods 0.000 title claims abstract description 40
- 239000002390 adhesive tape Substances 0.000 title claims abstract description 37
- 238000000034 method Methods 0.000 title abstract description 9
- 238000012545 processing Methods 0.000 claims abstract description 25
- 230000003321 amplification Effects 0.000 claims description 4
- 230000005540 biological transmission Effects 0.000 claims description 4
- 238000003199 nucleic acid amplification method Methods 0.000 claims description 4
- 238000003825 pressing Methods 0.000 claims description 4
- 230000005611 electricity Effects 0.000 claims description 3
- 235000013399 edible fruits Nutrition 0.000 claims 1
- 230000008901 benefit Effects 0.000 abstract description 7
- 230000002452 interceptive effect Effects 0.000 description 2
- 230000003287 optical effect Effects 0.000 description 2
- 238000011160 research Methods 0.000 description 2
- 238000012360 testing method Methods 0.000 description 2
- 230000009286 beneficial effect Effects 0.000 description 1
- 238000004891 communication Methods 0.000 description 1
- 230000001186 cumulative effect Effects 0.000 description 1
- 230000007812 deficiency Effects 0.000 description 1
- 238000010586 diagram Methods 0.000 description 1
- 238000005516 engineering process Methods 0.000 description 1
- 230000002708 enhancing effect Effects 0.000 description 1
- 239000000686 essence Substances 0.000 description 1
- 239000003292 glue Substances 0.000 description 1
- 238000005286 illumination Methods 0.000 description 1
- 230000001771 impaired effect Effects 0.000 description 1
- 238000009434 installation Methods 0.000 description 1
- 238000012423 maintenance Methods 0.000 description 1
- 238000004519 manufacturing process Methods 0.000 description 1
- 238000005259 measurement Methods 0.000 description 1
- 238000012986 modification Methods 0.000 description 1
- 230000004048 modification Effects 0.000 description 1
- 230000000644 propagated effect Effects 0.000 description 1
- 238000002310 reflectometry Methods 0.000 description 1
- 238000005070 sampling Methods 0.000 description 1
- 230000035945 sensitivity Effects 0.000 description 1
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- Inspection Of Paper Currency And Valuable Securities (AREA)
- Investigating Materials By The Use Of Optical Means Adapted For Particular Applications (AREA)
Abstract
The invention discloses it is a kind of based on laser reflection identification banknote on adhesive tape photoelectric detection system and method, device include one have opening babinet, banknote to be detected from open outside parallel through；Laser array, laser tube drive circuit, several plane mirrors, laser sensor array, signal processing circuit are equipped with babinet；The laser that laser array is sent is radiated on banknote to be detected by opening, and the reflected light of banknote to be detected is radiated on laser sensor array after the reflection of several plane mirrors；Signal processing circuit is connected with laser tube drive circuit, laser sensor array respectively, for sending control signal to laser tube drive circuit, laser sensor array signal is converted into corresponding logical signal, and judges whether be pasted with adhesive tape on current banknote to be detected according to the logical signal.The present invention can detect the banknote for being stained with adhesive tape, have the advantages that small, efficient, speed is fast, resolution capability is strong.
Description
Technical field
The present invention relates to banknote to detect research field, more particularly to a kind of based on adhesive tape on laser reflection identification banknote
Photoelectric detection system and method.
Background technology
Banknote is circulated extensively in different social sectors as the medium of exchange.In the process of circulation, banknote will necessarily
It is worn, becomes damaged coin, residual old coin.People are continuing with after often impaired currency is handled using adhesive tape in life,
And the equipment such as cash inspecting machine common at present and ATM machine can not accurately identify this banknote, or even can also when identifying this banknote
Cause equipment damage.
Particularly, a genuine note can be divided into two by offender in recent years, and the banknote of the true half vacation of half is passed through
Tape-stripping together, makes technique of composite-RMB bank note.Or the part of anti-fake mark is cut out from low-denomination genuine note, then viscous benefit is big
The same position of denomination counterfeit money, is got by under false pretences in a manner of this adulterium.Since adhesive tape currently on the market is very thin, other banknote
The mode of production determine that banknote original appearance thickness is not strict conformance, so conventional money-checking equipment can not be by detecting the side of thickness
Formula comes out the banknote for being pasted with adhesive tape and technique of composite-RMB bank note sorting.
Therefore, research is a kind of can accurately identify the photoelectric detection system and method that adhesive tape whether is pasted with banknote
It is worth with important practical.
The content of the invention
The shortcomings that it is a primary object of the present invention to overcome the prior art and deficiency, there is provided one kind is identified based on laser reflection
The photoelectric detection system of adhesive tape on banknote, the device have the advantages that efficient, speed is fast, resolution capability is strong.
Another object of the present invention is to provide a kind of detection method based on above-mentioned photoelectric detection system, this method identification
Accuracy rate, speed are compared with prior art higher.
The purpose of the present invention is realized by following technical solution：Light based on adhesive tape on laser reflection identification banknote
Electric detection means, including one have opening babinet, the banknote to be detected from open outside parallel through；Set in the babinet
There are laser array, laser tube drive circuit, several plane mirrors, laser sensor array, signal processing circuit；The laser
The laser that pipe array is sent is radiated on banknote to be detected by opening, and the reflected light of banknote to be detected is through several plane mirrors
It is radiated at after reflection on laser sensor array；The signal processing circuit respectively with laser tube drive circuit, laser sensor
Array is connected, and for sending control signal to laser tube drive circuit, laser sensor array signal is converted to and is patrolled accordingly
Signal is collected, and judges whether be pasted with adhesive tape on current banknote to be detected according to the logical signal.The present invention is by swashing
Light carries out multiple reflections to be detected, and solving common banknote sorting equipment can not be by the banknote for being stained with adhesive tape with carrying other
The problem of banknote Complete Classification detection of foreign matter, and the volume of device is effectively reduced, save installation space.And light source uses
Laser array, has the advantages that the advantages of sweep speed is fast, and testing result is accurate.
Preferably, each laser tube in the laser array is connected with laser tube drive circuit respectively.So as to laser
Tube drive circuit can control the unlatching of each laser tube respectively, avoid interfering with each other, and improve detection sensitivity.
Further, the laser array is made of a row in the conplane laser diode of same straight line.
Preferably, the both sides up and down of plane where the photoelectric detection system is assemblied in banknote to be detected respectively.And then can
Can be scanned at the same time to banknote two sides when banknote to be detected passes through detection zone, so as to further reduce the body of device
Product.
Preferably, the laser array by FFC flexible flat cables (Flexible Flat Cable) carry in swash
Light pipe drive circuit, laser sensor array is by FFC flexible flat cable carries in signal processing circuit.Device each several part it
Between connected by FFC flexible flat cables, and be combined into one closing casket shape structure, can effectively reduce extraneous light
Interference, improves resolution capability.
Preferably, signal amplification circuit is equipped with the signal processing circuit, which is used to amplify laser
The signal of sensor array collection.So that the signal of collection has good contrast, it is viscous easy to accurately distinguish below
The banknote and common banknote taped.
A kind of detection method based on above-mentioned photoelectric detection system, including step：Laser tube in laser array according to
The order of setting launches laser pulse respectively so that each point on banknote to be detected can be sometime scanned；According to
The laser on banknote to be detected is mapped to after first reflection, then is reflected through several plane mirrors, is finally irradiated to laser sensing
Device array, laser sensor array detect the intensity of laser pulse, and signal processing circuit is sentenced according to the difference of laser pulse intensity
Break and on current banknote to be detected whether there is Continuous pressing device for stereo-pattern.
Specifically, including step：
(1) photoelectric detection system is fixed on to the side of banknote transmission channel, one spacing of plane is run apart from banknote
From；
(2) when starting to work, signal processing circuit sends control signal, laser tube drive circuit to laser tube drive circuit
Laser array is driven to scan the respective regions on banknote by setting sequential transmission laser pulse；
(3) signal processing circuit circulates in that same order reads the strong of the laser pulse that laser sensor array obtains
Angle value, the position of the intensity level and laser facula on banknote have correspondence；Judge whether intensity level is more than predetermined threshold value,
If it is, illustrating there is stickup adhesive tape at current facula position, otherwise explanation is without stickup adhesive tape.
Compared with prior art, the present invention having the following advantages that and beneficial effect：
1st, laser beam, which is radiated on the banknote of no Continuous pressing device for stereo-pattern, occurs diffusing reflection, and the adhesive tape pasted on banknote can make to swash
Light beam largely weakens diffusing reflection so that laser beam is propagated in a manner of approximate mirror-reflection.It is pasted with the part of adhesive tape
It can significantly improve the intensity of illumination that laser sensor array receives, be designed according to this principle present invention using multiple reflections formula
The banknote for being stained with adhesive tape can not be detected with the banknote Complete Classification with other foreign matters to solve common banknote sorting equipment
Problem, easy to disassemble and maintenance small with device cumulative volume, and recognition accuracy is high, fireballing advantage.
2nd, light source of the invention uses laser array, and sweep speed is high, can quickly scan and be needed on whole banknote
Detection zone.Adjacent laser tube can avoid interfering with each other, testing result is accurately sensitive with time-shared switch.
3rd, detection device of the present invention, can be assemblied in the both sides up and down of banknote plane respectively, while scan whole paper money
Ticket, reduces the limitation of mechanical part size.
4th, multiple plane mirrors can be used in the present invention by the reflected light pass of banknote to be detected to laser sensor array,
Optical path length can so be increased in the confined space, the size of device is reduced, add contrast.
Brief description of the drawings
Fig. 1 is the principle schematic of embodiment 1.
Fig. 2 is the structure diagram of embodiment 1.
Fig. 3 is the principle schematic of embodiment 2.
In Fig. 1-3：1-laser array, 3-laser tube drive circuit, 4-banknote, 5-laser sensor array, 7-
Signal processing circuit, 8-plane mirror, 9-banknote operation plane, the 10-the first plane mirror, the 11-the second plane mirror, 12-the three
Plane mirror.
Embodiment
With reference to embodiment and attached drawing, the present invention is described in further detail, but embodiments of the present invention are unlimited
In this.
Embodiment 1
It can occur diffusing reflection, mirror-reflection when light is irradiated to body surface, relatively rougher paper and relatively
Smooth adhesive tape is different to the reflectivity of light, and in theory, on banknote after Continuous pressing device for stereo-pattern, scattering property weakens, reflecting properties enhancing,
Most of light can be reflected in a manner of approximate mirror-reflection.And scattering property is stronger when not having adhesive tape on banknote, light is main
All directions are reflexed in a manner of diffusing reflection.Reflected light light path somewhere is placed in using laser sensor, after detection banknote reflection
Laser intensity, approximate mirror-reflection can occur when being pasted with adhesive tape on banknote, and the light intensity measured at this time is larger, conversely, as
Main that diffusing reflection occurs, the light intensity measured is smaller.The present invention is based on this principle, designs whether a kind of detection banknote surface glues
Paste the photoelectric detection system of adhesive tape.
Referring to Fig. 1,2, photoelectric detection system of the present embodiment based on adhesive tape on laser reflection identification banknote, including swash
Light pipe array 1, laser tube drive circuit 3, laser sensor array 5, signal processing circuit 7 and plane mirror 8.Above-mentioned component is all provided with
Put in a babinet with opening.
In the present embodiment, laser array 1 is by FFC flexible flat cables carry in laser tube drive circuit 3, laser
Sensor array 5 is driven with laser tube respectively by FFC flexible flat cables carry in signal processing circuit 7, signal processing circuit 7
Circuit 3, laser sensor array 5 are connected, and laser array 1 is fixed on the fixed plate in babinet, and banknote 4 runs plane in banknote
Horizontal movement on 9.
In the present embodiment, signal amplification circuit is additionally provided with the signal processing circuit, which is used for
Amplify the signal of laser sensor array collection.
In the present embodiment, laser array is made of 32 laser diodes on same straight line, laser array
Effective measurement area can cover whole banknote.
For 100 yuan of certificates of the 5th set of RMB, its size is 155 millimeters * 77 millimeters, when setting is at intervals of two of 16
Laser tube is lighted at the same time, is circulated successively.20 banknotes of detection per second are set, i.e. the movement velocity of banknote is 3.1 meter per seconds.At this time,
Every banknote total sweep time is 50 milliseconds, every banknote transversal scanning 16 times, and 32 points are scanned on each horizontal line, such a to sweep
The mode of retouching is enough all areas for covering banknote.When working in such a mode, each scanning element has the sweep time of 195 microseconds,
I.e. sampling rate is 5.1KHz.
Above-mentioned photoelectric detection system uses following detection method, comprises the following steps：
1st, above-mentioned photoelectric detection system is run into plane certain distance apart from banknote, is separately fixed at plane both sides.Above
Detection device and following detection device stagger a distance, prevent and interfere with each other.
2nd, the parameter such as signal processing circuit setting scan mode, speed, laser tube driving electricity is sent to by communication interface
Road, banknote run on banknote plane, and photoelectric detection system is started to work.
3rd, laser array launches laser pulse according to setting means, and laser pulse is irradiated after banknote by diffusing reflection and mirror
Face is reflected, and is irradiated to laser sensor array.Laser sensor array is by the intensity level of the laser pulse received according to swashing
The identical order of light pipe array emitter laser pulse is sent to signal processing circuit, and signal processing circuit judges whether intensity level is big
In predetermined threshold value, if it is, illustrating there is stickup adhesive tape at current facula position, otherwise without stickup adhesive tape.
In practical applications, the intensity level for the laser pulse that first can also be received laser sensor array is converted into electricity
Different electric signals is pressed, the logical signal for meeting Transistor-Transistor Logic level is processed into through signal amplification circuit.Signal processing circuit reads this and patrols
Signal is collected, determines whether there is adhesive tape, and adhesive tape position.
Embodiment 2
The present embodiment in addition to following characteristics other structures with embodiment 1：Referring to Fig. 3, the present embodiment is known based on laser reflection
The photoelectric detection system of adhesive tape on other banknote, including the first plane mirror 10, the second plane mirror 11, the 3rd plane mirror 12, institute
State after the laser that laser array is sent is radiated on banknote to be detected by opening, the reflected light of banknote to be detected is (especially
For posting tape portion) successively through the first plane mirror 10, the second plane mirror 11, the 3rd plane mirror 12 reflection after, be radiated at
On laser sensor array.
Why reflected using multiple plane mirrors, be to increase optical path length, increase pair in the confined space
Than degree, and then improve the accuracy of identification.
Above-described embodiment is the preferable embodiment of the present invention, but embodiments of the present invention and from above-described embodiment
Limitation, other any Spirit Essences without departing from the present invention with made under principle change, modification, replacement, combine, simplification,
Equivalent substitute mode is should be, is included within protection scope of the present invention.
Claims (7)
1. the photoelectric detection system based on adhesive tape on laser reflection identification banknote, it is characterised in that there is opening including one
Babinet, banknote to be detected from open outside parallel through；Be equipped with the babinet laser array, laser tube drive circuit,
At least two plane mirrors, laser sensor array, signal processing circuit；The laser that the laser array is sent is shone by opening
Penetrate on banknote to be detected, the reflected light of banknote to be detected is radiated on laser sensor array after the reflection of plane mirror；Institute
State signal processing circuit respectively with laser tube drive circuit, laser sensor array to be connected, for sending out to laser tube drive circuit
Control signal is sent, laser sensor array signal is converted into corresponding logical signal, and judge to work as according to the logical signal
Whether adhesive tape is pasted with preceding banknote to be detected；
Each laser tube in the laser array is connected with laser tube drive circuit respectively；Laser tube in laser array
Launch laser pulse respectively according to the order of setting so that each point on banknote to be detected can be sometime scanned
Arrive.
2. the photoelectric detection system according to claim 1 based on adhesive tape on laser reflection identification banknote, its feature
It is, the laser array is made of a row in the conplane laser diode of same straight line.
3. the photoelectric detection system according to claim 1 based on adhesive tape on laser reflection identification banknote, its feature
It is, signal amplification circuit is equipped with the signal processing circuit, which is used to amplify laser sensor array
The signal of collection.
4. the photoelectric detection system according to claim 1 based on adhesive tape on laser reflection identification banknote, its feature
It is, the laser array is passed through by FFC flexible flat cables carry in laser tube drive circuit, laser sensor array
FFC flexible flat cable carries are in signal processing circuit.
5. the photoelectric detection system according to claim 1 based on adhesive tape on laser reflection identification banknote, its feature
It is, the both sides up and down of plane where the photoelectric detection system is assemblied in banknote to be detected respectively.
6. a kind of detection method based on claim 1-5 any one of them photoelectric detection systems, it is characterised in that including step
Suddenly：Laser tube in laser array launches laser pulse respectively according to the order of setting so that each on banknote to be detected
Point all can be sometime scanned；The laser on banknote to be detected is irradiated to after first reflection, then it is flat through several
Face mirror reflection, is finally irradiated to laser sensor array, and laser sensor array detects the intensity of laser pulse, signal processing electricity
Judge whether there is Continuous pressing device for stereo-pattern on current banknote to be detected according to the difference of laser pulse intensity in road.
7. detection method according to claim 6, it is characterised in that including step：
(1) photoelectric detection system is fixed on to the side of banknote transmission channel, plane certain distance is run apart from banknote；
(2) when starting to work, signal processing circuit sends control signal, the driving of laser tube drive circuit to laser tube drive circuit
Laser array scans the respective regions on banknote by setting sequential transmission laser pulse；
(3) signal processing circuit circulates the intensity for reading the laser pulse that laser sensor array obtains in that same order
Value, the position of the intensity level and laser facula on banknote have correspondence；Judge whether intensity level is more than predetermined threshold value, such as
Fruit is then to illustrate there is stickup adhesive tape at current facula position, and otherwise explanation is without stickup adhesive tape.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201510680824.2A CN105321253B (en) | 2015-10-19 | 2015-10-19 | Photoelectric detection system and method based on adhesive tape on laser reflection identification banknote |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201510680824.2A CN105321253B (en) | 2015-10-19 | 2015-10-19 | Photoelectric detection system and method based on adhesive tape on laser reflection identification banknote |
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| Publication Number | Publication Date |
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| CN105321253A CN105321253A (en) | 2016-02-10 |
| CN105321253B true CN105321253B (en) | 2018-04-17 |
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| CN201510680824.2A Expired - Fee Related CN105321253B (en) | 2015-10-19 | 2015-10-19 | Photoelectric detection system and method based on adhesive tape on laser reflection identification banknote |
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Families Citing this family (2)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| US10160614B1 (en) * | 2017-10-26 | 2018-12-25 | Ncr Corporation | Banknote foreign object detection using pressure sensing array |
| CN109714866B (en) * | 2019-02-28 | 2024-04-05 | 广州魁科机电科技有限公司 | Light supplementing device for three-dimensional scanner and automatic dimming system |
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|---|---|---|---|---|
| EP1904833A1 (en) * | 2005-06-28 | 2008-04-02 | Crane Canada Co. | Method and apparatus for detecting overlapped substrates |
| CN102385769A (en) * | 2011-11-12 | 2012-03-21 | 温州泓鼎商用机器有限公司 | Optical device for detecting and identifying damaged paper money by using photosensitive element |
| CN104361673A (en) * | 2014-10-31 | 2015-02-18 | 苏州保瑟佳货币检测科技有限公司 | Multibeam-based negotiable securities adhesive tape detecting device and method |
| CN104392538A (en) * | 2014-10-31 | 2015-03-04 | 苏州保瑟佳货币检测科技有限公司 | Tape detecting device and method for negotiable securities |
| CN205158503U (en) * | 2015-10-19 | 2016-04-13 | 华南师范大学 | Photoelectric detection system based on adhesive tape on laser -bounce discernment bank note |
-
2015
- 2015-10-19 CN CN201510680824.2A patent/CN105321253B/en not_active Expired - Fee Related
Patent Citations (5)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| EP1904833A1 (en) * | 2005-06-28 | 2008-04-02 | Crane Canada Co. | Method and apparatus for detecting overlapped substrates |
| CN102385769A (en) * | 2011-11-12 | 2012-03-21 | 温州泓鼎商用机器有限公司 | Optical device for detecting and identifying damaged paper money by using photosensitive element |
| CN104361673A (en) * | 2014-10-31 | 2015-02-18 | 苏州保瑟佳货币检测科技有限公司 | Multibeam-based negotiable securities adhesive tape detecting device and method |
| CN104392538A (en) * | 2014-10-31 | 2015-03-04 | 苏州保瑟佳货币检测科技有限公司 | Tape detecting device and method for negotiable securities |
| CN205158503U (en) * | 2015-10-19 | 2016-04-13 | 华南师范大学 | Photoelectric detection system based on adhesive tape on laser -bounce discernment bank note |
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