CN104700490A - Multi-model coin signal collecting device based on eddy current sensor - Google Patents
Multi-model coin signal collecting device based on eddy current sensor Download PDFInfo
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- CN104700490A CN104700490A CN201310659867.3A CN201310659867A CN104700490A CN 104700490 A CN104700490 A CN 104700490A CN 201310659867 A CN201310659867 A CN 201310659867A CN 104700490 A CN104700490 A CN 104700490A
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- eddy current
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- current vortex
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Abstract
The invention discloses a multi-model coin signal collecting device based on an eddy current sensor. The multi-model coin signal collecting device employees the eddy current sensor to distinguish true coins from false coins. The eddy current sensor is composed of a sensing coil (1) and an exciting coil (2) and employees the low-frequency transmission principle so as to accurately distinguish the coins of different face values and effectively distinguish the true coins from the false coins. The eddy current sensor, based on the eddy current effect, is high in flexibility, wide in frequency response range, capable of non-contact measuring, strong in adaptability and the like. The multi-model coin signal collecting device can efficiently process and distinguish the mass coins, accordingly allowing the coin circulation achieved.
Description
Technical field
The present invention relates to the Coin identifying apparatus in financial field, especially relate to a kind of multi-modal current vortex sensor coin signal harvester.
Background technology
Along with developing rapidly of electronic technology, the universal industry-by-industry field of application of Coin identifying apparatus, at self-service bus, automatically vending system and ticket machine, all need in the industries such as coin-box telephone set to install Coin identifying apparatus.China has issued 5 cover coins altogether, and because material difference is large, the many and casting parameter differences that the is coin of the same race of each version of Currency Type is large, meanwhile, market exists smash and a large amount of game moneys, therefore proposes very high requirement to the false distinguishing of coin.
In the last few years, just developing a kind of sensor be based upon in eddy current effect principle both at home and abroad, i.e. current vortex sensor, this sensor utilizes eddy current effect to carry out work, the multiple physical quantity that body surface is metallic conductor can be measured non-contactly, there is structure simple, frequency response range wide (from zero to hundreds of kilohertz), highly sensitive, measure linear scope are large, small volume, not by the impact of the media such as greasy dirt, the fields such as displacement, vibration, thickness, rotating speed, temperature, the isoparametric measurement of hardness and nondestructive examination can be widely used in.Native system detects and false distinguishing coin based on eddy current sensor.
Summary of the invention
Cell winding is hollow rectangle coil, polyurethane enamelled wire, twine from inside to outside during winding, dextrorotation is wound around, and tightly, every interlayer pad plastic adhesive tape isolation, extension line three, except the additional shielding line in coil two, wherein receives on the GND of circuit board after shielding line and coil two extension line tangle up, drive coil adds U-shaped metallic shield, the overall sealant pouring and sealing of sensor.
A kind of multi-modal current vortex sensor coin signal harvester, comprise and forming by around the inductive coil (1) on upper module with around the drive coil (2) on lower module, pass to exciting current by lower module extension line, thus produce alternating magnetic field around upper and lower module.
Described inductive coil and drive coil are hollow rectangle coil, polyurethane enamelled wire, twine from inside to outside during winding, dextrorotation is wound around, and tight, every interlayer pad plastic adhesive tape isolation, extension line three, except the additional shielding line in coil two, wherein receive on the GND of circuit board after shielding line and coil two extension line tangle up.
Described drive coil adds U-shaped metallic shield, the overall sealant pouring and sealing of sensor; After the inductive coil of sensor and drive coil are fixedly mounted, coin by time detecting distance can not change because of factors such as vibrations; Coin, by after current vortex sensor, differentiates the true and false of coin by the electrical quantity detecting unlike material coin and distinguishes the coin of different denominations.
Coil parameter is as follows:
| Coil parameter | Drive coil | Inductive coil |
| Inductance | 249.6uh | 391.9uh |
| Resistance | 2.9Ω | 3.9Ω |
| Wire diameter | Φ0.29mm | Φ0.29mm |
| Length | 8315mm | 11765mm |
| Around to | Dextrorotation | Dextrorotation |
The coil number of plies and every layer of number of turn as follows:
| The number of plies | Lower coil (drive coil) | Upper coil (inductive coil) |
| 1 | 10 | 18 |
| 2 | 28 | 26 |
| 3 | 28 | 30 |
| 4 | 32 | 30 |
| 5 | / | 30 |
The invention has the beneficial effects as follows that sensor construction is simple, frequency response is wide, highly sensitive, measurement range is large, antijamming capability is strong, particularly there is the advantage of non-cpntact measurement, therefore be widely used in commercial production and scientific and technical every field, effectively can distinguish the coin of different denominations, for the coin that some special sectors such as bank are a large amount of carries out processing efficiently providing great convenience.
Accompanying drawing explanation
Fig. 1 is sensor outside drawing;
Fig. 2 is current vortex sensor schematic diagram.
Embodiment
Current vortex sensor be based upon Theory of Electromagnetic Field basis on work.Structure, current vortex sensor is exactly a coil, passes to alternating current in coil, then will produce alternating magnetic field around coil.Metallic conductor is placed in the magnetic field that vary, and will produce induction current in conductor, and this electric current is turn-taked as whirlpool in water in conductor, so be called current vortex, this phenomenon is called eddy current effect.
The measurement of the coat of metal often adopts low frequency transmission-type current vortex sensor, as shown in Figure 2.Need to choose high frequency f to encourage, but response curve is now with the reduction of thickness, and non-linear change is large.Low frequency transmission-type current vortex sensor is by drive coil L1 and inductive coil L2, and they lay respectively at the both sides of tested metal.When excitation frequency one timing chosen, the resistivity of different materials is different, and the depth of penetration is also different, will cause the change of output voltage curve shape thus.
Eddy current detection method passes to alternating current to the drive coil of current vortex sensor, thus produce alternating magnetic field around two coils, makes measured conductor surface produce current vortex, thus change inductive coil electrical quantity.The non-electrical parameter of measured body can be converted to electrical quantity by current vortex sensor, and be recorded by metering circuit.The main element of current vortex sensor is inductive coil, and under high-frequency current excitation, it can produce an alternating magnetic field.When inductive coil is close to measured body, measured conductor, due to the effect by alternating magnetic field, creates current vortex at conductive surface.The generation of current vortex will cause the energy loss of inductive coil, the size of inductive coil energy loss, with the distance of the inductive coil of measured body, and the diameter of measured body, thickness and physical property (as conductivity, magnetic permeability etc.) closely related.And the energy loss of inductive coil, then cause the change of inductive coil electrical quantity (as impedance, inductance etc.).
Although the true and false coin diameter of same value of money, thickness is substantially identical, but because the use material, manufacturing process, anti-false sign etc. of true and false coin is had any different, therefore their physical property is different, when they are through current vortex sensor (remaining unchanged with the distance of measured body and inductive coil), cause the electrical quantity change of inductive coil just different; Voltage magnitude so on current vortex sensor, frequency will cause change.
This sensor adopts low frequency transmission-type principle, and wherein inductive coil and drive coil are around to identical.Current vortex sensor is fixedly mounted, ensure coin by time detecting distance can not change because of factors such as vibrations.Then by the coin of unlike material, different denominations successively through current vortex sensor, the amplitude of the output waveform produced due to each Currency Type of eddy current effect is different.The waveform of the coin measured by this sensor is the complex wave of high, normal, basic three frequencies superposition, wherein higher frequency 460KHz, IF-FRE 115KHz, Frequency 7.2KHz.Sensor is by the amplitude of the output waveform of three of different denominations coin frequencies, by corresponding sensor control circuit by electrical signal collection in CPU, then CPU carries out effective identification by detecting different AD values to the coin of each Currency Type, thus distinguishes coin and the true and false of different denominations.
More than realize example cited by invention, be only the use that this technical scheme is described, the change of the local of other various implement device circuit, all should fall among the present invention.
Claims (3)
1. a multi-modal current vortex sensor coin signal harvester, it is characterized in that: comprise and forming by around the inductive coil (1) on upper module with around the drive coil (2) on lower module, pass to exciting current by lower module extension line, thus produce alternating magnetic field around upper and lower module.
2. one according to claim 1 multi-modal current vortex sensor coin signal harvester, it is characterized in that: described inductive coil and drive coil are hollow rectangle coil, polyurethane enamelled wire, twine from inside to outside during winding, dextrorotation is wound around, and tightly, every interlayer pad plastic adhesive tape isolation, extension line three, except the additional shielding line in coil two, wherein receives on the GND of circuit board after shielding line and coil two extension line tangle up.
3. one according to claim 1 multi-modal current vortex sensor coin signal harvester, is characterized in that: described drive coil adds U-shaped metallic shield, the overall sealant pouring and sealing of sensor; After the inductive coil of sensor and drive coil are fixedly mounted, coin by time detecting distance can not change because of factors such as vibrations; Coin, by after current vortex sensor, differentiates the true and false of coin by the electrical quantity detecting unlike material coin and distinguishes the coin of different denominations.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201310659867.3A CN104700490A (en) | 2013-12-10 | 2013-12-10 | Multi-model coin signal collecting device based on eddy current sensor |
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| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201310659867.3A CN104700490A (en) | 2013-12-10 | 2013-12-10 | Multi-model coin signal collecting device based on eddy current sensor |
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| CN104700490A true CN104700490A (en) | 2015-06-10 |
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| Application Number | Title | Priority Date | Filing Date |
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| CN201310659867.3A Pending CN104700490A (en) | 2013-12-10 | 2013-12-10 | Multi-model coin signal collecting device based on eddy current sensor |
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Cited By (6)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN105069891A (en) * | 2015-08-03 | 2015-11-18 | 无锡乐尔科技有限公司 | Coin detection probe and detection system thereof |
| CN105942687A (en) * | 2016-04-15 | 2016-09-21 | 浙江大学 | Countable money jar and displaying method thereof |
| CN106600808A (en) * | 2016-12-09 | 2017-04-26 | 深圳市倍量电子有限公司 | Coin identification method and coin identification device |
| CN107909707A (en) * | 2017-10-27 | 2018-04-13 | 广州畅阳电子科技有限公司 | A kind of coin recognizing method algorithm and system |
| CN107918968A (en) * | 2017-10-27 | 2018-04-17 | 广州畅阳电子科技有限公司 | A kind of Coin identifying apparatus and recognition methods |
| CN108038955A (en) * | 2017-11-29 | 2018-05-15 | 广州畅阳电子科技有限公司 | A kind of Coin sorting kicks coin device and method |
Citations (9)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN2240743Y (en) * | 1995-08-18 | 1996-11-20 | 林俊明 | Tester for identifying true and false coin |
| JPH11175793A (en) * | 1997-12-16 | 1999-07-02 | Sankyo Seiki Mfg Co Ltd | Surface shape detection sensor |
| US20030102197A1 (en) * | 1999-03-17 | 2003-06-05 | Yonezo Furuya | Coin inspection method and apparatus therefor |
| CN201242779Y (en) * | 2008-05-22 | 2009-05-20 | 中钞长城金融设备控股有限公司 | Dynamic multi-frequency detector for coin magneto-electric characteristic parameter |
| CN201413541Y (en) * | 2009-05-08 | 2010-02-24 | 吕冰 | Coin truth detecting device |
| CN202771527U (en) * | 2012-07-17 | 2013-03-06 | 南京中钞长城金融设备有限公司 | Coin identifier |
| CN103021067A (en) * | 2012-12-12 | 2013-04-03 | 北京航天测控技术有限公司 | Coin recognition device |
| CN103123400A (en) * | 2011-11-20 | 2013-05-29 | 常州中科煜明科技有限公司 | High-accuracy metal detection sensor device |
| CN203673555U (en) * | 2013-12-10 | 2014-06-25 | 北京华夏聚龙自动化股份公司 | Multi-modal eddy current sensor coin signal collection device |
-
2013
- 2013-12-10 CN CN201310659867.3A patent/CN104700490A/en active Pending
Patent Citations (9)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN2240743Y (en) * | 1995-08-18 | 1996-11-20 | 林俊明 | Tester for identifying true and false coin |
| JPH11175793A (en) * | 1997-12-16 | 1999-07-02 | Sankyo Seiki Mfg Co Ltd | Surface shape detection sensor |
| US20030102197A1 (en) * | 1999-03-17 | 2003-06-05 | Yonezo Furuya | Coin inspection method and apparatus therefor |
| CN201242779Y (en) * | 2008-05-22 | 2009-05-20 | 中钞长城金融设备控股有限公司 | Dynamic multi-frequency detector for coin magneto-electric characteristic parameter |
| CN201413541Y (en) * | 2009-05-08 | 2010-02-24 | 吕冰 | Coin truth detecting device |
| CN103123400A (en) * | 2011-11-20 | 2013-05-29 | 常州中科煜明科技有限公司 | High-accuracy metal detection sensor device |
| CN202771527U (en) * | 2012-07-17 | 2013-03-06 | 南京中钞长城金融设备有限公司 | Coin identifier |
| CN103021067A (en) * | 2012-12-12 | 2013-04-03 | 北京航天测控技术有限公司 | Coin recognition device |
| CN203673555U (en) * | 2013-12-10 | 2014-06-25 | 北京华夏聚龙自动化股份公司 | Multi-modal eddy current sensor coin signal collection device |
Cited By (7)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN105069891A (en) * | 2015-08-03 | 2015-11-18 | 无锡乐尔科技有限公司 | Coin detection probe and detection system thereof |
| CN105942687A (en) * | 2016-04-15 | 2016-09-21 | 浙江大学 | Countable money jar and displaying method thereof |
| CN106600808A (en) * | 2016-12-09 | 2017-04-26 | 深圳市倍量电子有限公司 | Coin identification method and coin identification device |
| CN106600808B (en) * | 2016-12-09 | 2022-12-02 | 深圳市倍量电子有限公司 | Coin discriminating method and apparatus |
| CN107909707A (en) * | 2017-10-27 | 2018-04-13 | 广州畅阳电子科技有限公司 | A kind of coin recognizing method algorithm and system |
| CN107918968A (en) * | 2017-10-27 | 2018-04-17 | 广州畅阳电子科技有限公司 | A kind of Coin identifying apparatus and recognition methods |
| CN108038955A (en) * | 2017-11-29 | 2018-05-15 | 广州畅阳电子科技有限公司 | A kind of Coin sorting kicks coin device and method |
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Application publication date: 20150610 |