CN105374106B - A kind of ATM note detection device and detection method - Google Patents
A kind of ATM note detection device and detection method Download PDFInfo
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- CN105374106B CN105374106B CN201510741312.2A CN201510741312A CN105374106B CN 105374106 B CN105374106 B CN 105374106B CN 201510741312 A CN201510741312 A CN 201510741312A CN 105374106 B CN105374106 B CN 105374106B
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Abstract
The invention discloses a kind of ATM note detection device and detection method, including processor, display, alarm, memory, fpga chip, signal acquisition circuit, fast pulley, positioned at fast pulley top and the floating roller that is brought into close contact with fast pulley, 2 roller bearings being respectively arranged on fast pulley and floating roller, pcb board above floating roller, the reference sensor group and signal acquisition sensor group corresponding with floating roller on pcb board lower surface；Reference sensor group includes m sensor coil, signal acquisition sensor group includes n sensor coil, n=5m, m >=3, m sensor coil of reference sensor group and n sensor coil of signal acquisition sensor group are arranged in order into a row vertical with the coin-out direction of bank note；Each sensor coil is connected with 1 RC oscillating circuit；The present invention has the characteristics of accuracy of detection is high, strong antijamming capability and detection efficiency are high.
Description
Technical field
The present invention relates to paper currency detection technical field, more particularly, to a kind of accuracy of detection height, the ATM of strong antijamming capability
Machine note detection device and detection method.
Background technology
Common current vortex paper currency detection is when bank note passes through two to roller bearing, is directly detected using current vortex sensor
The displacement of roller bearing obtains the situation of bank note.Due to for detect the measurement test point of bank note need it is densely arranged to reach abundant
Detection, its detect relatively intensive circuit and temperature change of circuit, electromagnetic interference etc. all have to detection signal collection it is serious
Influence.The autonomous channel control of single test point, even more causes that high cost, printing plate suqare be big, temperature influences big, electromagnetic interference
The shortcomings of big.
Chinese patent mandate publication number：CN103177502A, publication date on June 26th, 2013 is authorized, discloses a kind of paper
Note thickness measurement device in coin cleaning-sorting machine, including base, thickness perceive sheet metal, some PCB spiral windings, sliding block, master
Driving wheel, driven pulley, power transmission shaft and signal processing circuit, wherein, the base top is provided with cavity, and bottom is provided with the cunning
Block, and the lug boss of the sliding block stretches out the base upper surface；The thickness perceives sheet metal one end and is fixed on the base
Top, the other end are close to the lug boss of the sliding block；Some PCB spiral windings are arranged on the bottom of pcb board, and described
Thickness perceives sheet metal and is oppositely arranged, and perceives sheet metal with the cavity in the base and the thickness and form resonator；Institute
To state driven pulley and be arranged on the sliding block bottom, the driving wheel is set on the power transmission shaft, and relatively described driven pulley is set,
The signal processing circuit is arranged on the pcb board.The weak point of the invention is sensor coil negligible amounts, and is not had
There is the influence for considering the factors such as environment temperature, signal acquisition value is unstable, and the leakage for easily causing adhesive tape coin or incomplete coin is distinguished and distinguished by mistake.
The content of the invention
The goal of the invention of the present invention be in order to overcome the shortcomings of that paper currency detecting method cost is high in the prior art, error is big,
Provide a kind of high accuracy of detection, the ATM note detection device of strong antijamming capability and detection method.
To achieve these goals, the present invention uses following technical scheme：
A kind of ATM note detection device, including processor, display, alarm, memory, fpga chip, signal are adopted
Collector, fast pulley, positioned at fast pulley top and with the floating roller that fast pulley is brought into close contact, be respectively arranged on fast pulley and floating roller
On 2 roller bearings, the pcb board above floating roller, the reference sensor corresponding with floating roller on pcb board lower surface
Group and signal acquisition sensor group；Reference sensor group includes m sensor coil, and signal acquisition sensor group includes n sensing
Coil, n=5m, m >=3, m sensor coil of reference sensor group and n sensor coil of signal acquisition sensor group are successively
It is arranged in a row vertical with the coin-out direction of bank note；Each sensor coil is connected with 1 RC oscillating circuit, signal acquisition electricity
Output end of the input on road respectively with each RC oscillating circuits electrically connects, the output end of signal acquisition circuit, fpga chip and
Processor is sequentially connected electrically, and processor electrically connects with display, alarm and memory respectively.
Present invention introduces reference sensor group, the influence of environmental factor in testing result can be effectively rejected.
Ideally, the testing result of each sensor coil is the thickness value of actual bank note to be measured.But actual feelings
Condition is that data acquisition means, data transmission circuit can be influenceed by ambient temperature, electromagnetic interference etc., the number of actually detected result
Deviation occurs in value Stability and veracity.
Such as：X+Y=a, X are thickness value to be measured, and a is actually detected value, and Y is environmental impact factor；H+Y=b, h is
Know root thickness value, b is the detected value of reference thickness；
By root thickness value h detected value b, environmental impact factor value Y=b-h can be obtained；Again by testing result number
Environmental impact factor value in value is rejected, you can obtains actual (real) thickness value X=a-Y.
The pcb board lower surface of the present invention is provided with the reference sensor group and signal acquisition sensor corresponding with floating roller
Group, m sensor coil of reference sensor group and n sensor coil of signal acquisition sensor group are arranged in order into and bank note
The vertical row in coin-out direction, by the packet arrangement and the control of sampling order of sensor coil, it can effectively reduce neighboring sensor
The influence of electromagnetic interference between coil.
The present invention controls multiple sensor coils to gather simultaneously by differentiation working frequency, prevents signal cross-talk and improves inspection
Survey efficiency and accuracy of detection.
Therefore, the present invention has the characteristics of accuracy of detection is high, strong antijamming capability and detection efficiency are high.
Preferably, each RC oscillating circuits include electric capacity C, resistance Rs and resistance RL；The termination capacitor C mono- of resistance RL mono-
Hold and be grounded, collection sensor coil or benchmark sensor coil corresponding to another terminations of resistance RL, resistance Rs mono- terminate VCC, resistance
The Rs other ends connect the electric capacity C other ends, collection sensor coil or the benchmark sensor coil other end respectively.
Preferably, n sensor coil of signal acquisition sensor group is divided into p=n/m group signal acquisition sensors, the 1st
Group signal acquisition sensor, the 2nd group of signal acquisition sensor ..., pth group signal acquisition sensor and reference sensor group are successively
Arrangement, and the frequency of each group sensor coil increases successively；
1st group of signal acquisition sensor, the 2nd group of signal acquisition sensor ..., pth group signal acquisition sensor and benchmark
The capacitance of the RC oscillating circuits of each sensor coil in sensor group is sequentially reduced.
Preferably, m is 5, and the 1st group of signal acquisition sensor, the 2nd group of signal acquisition sensor ..., pth group letter
The first two sensor coil in number collection sensor and reference sensor group is in contact, and latter two sensor coil is in contact, the 3rd
Gap is equipped between sensor coil and the 2nd sensor coil, the 3rd sensor coil and the 4th sensor coil.
Preferably, without bank note by when, floating roller and benchmark sensor coil, floating roller and signal acquisition sensor coil
Between spacing be 0.8 to 1.3mm.
A kind of detection method of ATM note detection device, comprises the following steps：
The n sensor coil of (6-1) signal acquisition sensor group is divided into p=n/m group signal acquisition sensors, the 1st group of letter
Number collection sensor, the 2nd group of signal acquisition sensor ..., pth group signal acquisition sensor, reference sensor group are arranged in order,
And the frequency of each group sensor coil increases successively；
1st group of signal acquisition sensor, the 2nd group of signal acquisition sensor ..., pth group signal acquisition sensor, benchmark pass
The equal number consecutively of each sensor coil in sensor group is S1, S2 ..., Sm；
When bank note is laterally slided between fast pulley and floating roller, floating roller floats upwards, causes each sensor coil
Inductance value changes；
(6-2)
(6-2-1) signal acquisition circuit is according to the 1st group of signal acquisition sensor, the 2nd group of signal acquisition sensor ..., pth
Group signal acquisition sensor, the sensor coil Si order of reference sensor group gather the RC vibration electricity of each sensor coil successively
The signal of road output；Wherein, i initial value is 1；
(6-2-2) fpga chip obtains the sampled value Ref of reference sensor, the sampled value of each group signal acquisition sensor
Smp1, Smp2..., Smpp；
Utilize formula Oppj=Smpj- Ref is calculated and is obtained detected value Opp1, Opp2..., Oppp；Wherein, j be 1 ...,
p；
(6-2-3) makes i values increase by 1, return to step (6-2-1) as i ＜ m；
(6-3) is by OppjInput in calibration curve model, the detected value W after calibration is calculated1, W2..., Wp,
By W1, W2..., WpIt is conveyed to processor；
(6-4) processor obtains m groups W1, W2..., Wp, it is provided with memory and m groups W1, W2..., WpRelated data
Storehouse, processor is according to the m groups W of detection1, W2..., WpInquiry database obtains banknote thickness and corresponding bank note type is sentenced
Disconnected information, display show that bank note type judges information, when it is adhesive tape coin or incomplete coin that display, which shows bank note, processor control
Alarm equipment alarm processed.
Preferably, the calibration curve model is obtained using following steps：
Increased f corrector strip laterally slides between fast pulley and floating roller (7-1) selection thickness successively successively, utilizes step
Suddenly (6-1) to (6-2-3) obtains the m group detected values Opp of each corrector strip1, Opp2..., Oppp；
(7-2) calculates the m groups Opp of each corrector strip1, Opp2..., OpppAverage value OppIt is average, by each corrector strip
Thickness q and OppIt is averageForm point (q, an OppIt is average), obtain f point (q, OppIt is average), consecutive points are connected in two-dimensional coordinate system
Get up, obtain calibration curve model.
Preferably, f is 15 to 21.
Therefore, the present invention has the advantages that：Accuracy of detection is high, strong antijamming capability and detection efficiency are high.
Brief description of the drawings
Fig. 1 is a kind of structural representation of the present invention；
Fig. 2 is the reference sensor group of the present invention and a kind of structural representation of signal acquisition sensor group；
Fig. 3 is the RC oscillating circuits of the present invention and a kind of circuit diagram of sensor coil；
Fig. 4 is a kind of packet schematic diagram of the signal acquisition sensor group of the present invention；
Fig. 5 is a kind of theory diagram of the present invention；
Fig. 6 is a kind of flow chart of embodiments of the invention；
Fig. 7 is a kind of calibration curve illustraton of model of the present invention.
In figure：Processor 1, fpga chip 2, signal acquisition circuit 3, fast pulley 4, floating roller 5, roller bearing 6, pcb board 7, base
Quasi- sensor group 8, signal acquisition sensor group 9, bank note 10, RC oscillating circuits 11, display 12, alarm 13, memory 14,
Sensor coil 81.
Embodiment
The present invention will be further described with reference to the accompanying drawings and detailed description.
Embodiment as shown in Figure 1, Figure 2, Figure 5 is a kind of ATM note detection device, including processor 1, display
12nd, alarm 13, memory 14, fpga chip 2, signal acquisition circuit 3, fast pulley 4, positioned at fast pulley top and and fast pulley
The floating roller 5 being brought into close contact, 2 roller bearings 6 being respectively arranged on fast pulley and floating roller, the pcb board 7 above floating roller,
The reference sensor group 8 and signal acquisition sensor group 9 corresponding with floating roller on pcb board lower surface；Reference sensor
Group includes 5 sensor coils 81, and signal acquisition sensor group includes 20 sensor coils, as shown in Fig. 2 reference sensor group
5 sensor coils and 20 sensor coils of signal acquisition sensor group are arranged in order into one vertical with the coin-out direction of bank note
Row；Each sensor coil is connected with 1 RC oscillating circuit 11, and the input of signal acquisition circuit vibrates electricity with each RC respectively
The output end electrical connection on road, output end, fpga chip and the processor of signal acquisition circuit be sequentially connected electrically, processor respectively with
Display, alarm and memory electrical connection.
As shown in figure 3, each RC oscillating circuits include electric capacity C, resistance Rs and resistance RL；The termination capacitor C of resistance RL mono-
One end is simultaneously grounded, and collection sensor coil or benchmark sensor coil corresponding to another terminations of resistance RL, resistance Rs mono- terminate VCC, electricity
The resistance Rs other ends connect the electric capacity C other ends, collection sensor coil or the benchmark sensor coil other end respectively.
As shown in figure 4,20 sensor coils of signal acquisition sensor group are divided into 5 groups of signal acquisition sensors, the 1st group of letter
Number collection sensor, the 2nd group of signal acquisition sensor ..., the 5th group of signal acquisition sensor, reference sensor group are arranged in order,
And the frequency of each group sensor coil increases successively；
1st group of signal acquisition sensor, the 2nd group of signal acquisition sensor ..., the 5th group of signal acquisition sensor, benchmark pass
The electric capacity C of the RC oscillating circuits of each sensor coil in sensor group is respectively 68pF, 100pF, 120pF, 150pF, 200pF,
240pF is sequentially reduced.
1st group of signal acquisition sensor, the 2nd group of signal acquisition sensor ..., the 5th group of signal acquisition sensor, benchmark pass
The first two sensor coil in sensor group is in contact, and latter two sensor coil is in contact, the 3rd sensor coil and the 2nd sensing
Gap is equipped between coil, the 3rd sensor coil and the 4th sensor coil.
Do not have bank note by when, between floating roller and benchmark sensor coil, floating roller and signal acquisition sensor coil between
Away from being 1mm.
As shown in fig. 6, a kind of detection method of ATM note detection device, comprises the following steps：
Step 100, bank note is laterally slided between fast pulley and floating roller
20 sensor coils of signal acquisition sensor group are divided into p=4 group signal acquisition sensors, the 1st group of signal acquisition
Sensor, the 2nd group of signal acquisition sensor ..., the 4th group of signal acquisition sensor, reference sensor group are arranged in order, and respectively
The frequency of group sensor coil increases successively；
1st group of signal acquisition sensor, the 2nd group of signal acquisition sensor ..., the 4th group of signal acquisition sensor, benchmark pass
The equal number consecutively of each sensor coil in sensor group is S1, S2 ..., S5；
When bank note is laterally slided between fast pulley and floating roller, floating roller floats upwards, causes each sensor coil
Inductance value changes；
Step 200, detected value is obtained
Step 210, signal acquisition circuit is according to the 1st group of signal acquisition sensor, the 2nd group of signal acquisition sensor ..., and
4 groups of signal acquisition sensors, reference sensor group sensor coil Si order gather successively each sensor coil RC vibration
The signal of circuit output；Wherein, i initial value is 1；
Step 220, fpga chip obtains the sampled value Ref of reference sensor, the sampled value of each group signal acquisition sensor
Smp1, Smp2..., Smp4；
Utilize formula Oppj=Smpj- Ref is calculated and is obtained detected value Opp1, Opp2..., Opp4；Wherein, j be 1 ...,
4；
Step 230, as i ＜ 5, i values are made to increase by 1, return to step 210；
Step 300, detected value is calibrated
By OppjInput in calibration curve model, the detected value W after calibration is calculated1, W2..., W4, by W1,
W2..., W4It is conveyed to processor；
Step 400, testing result is shown, when for adhesive tape coin or worn coin alarm
Processor obtains 4 groups of W1, W2..., W4, it is provided with processor and 4 groups of W1, W2..., W4Related database, place
Manage 4 group Ws of the device according to detection1, W2..., W4Inquire about database and obtain banknote thickness and corresponding bank note type judgement letter
Breath, display show that bank note type judges information, when it is adhesive tape coin or incomplete coin that display, which shows bank note, processor control report
Alert device alarm.
Calibration curve model is obtained using following steps：
Increased 16 corrector strips laterally slide between fast pulley and floating roller (7-1) selection thickness successively successively, utilize
Step 100 obtains 4 groups of detected value Opp of each corrector strip to 2301, Opp2..., Opp5；
(7-2) calculates 4 groups of Opp of each corrector strip1, Opp2..., Opp5Average value OppIt is average, by each corrector strip
Thickness q and OppIt is averageForm point (q, an OppIt is average), obtain f point (q, OppIt is average), consecutive points are connected in two-dimensional coordinate system
Get up, as shown in Figure 7 obtains calibration curve model.
As shown in fig. 7, there is three curves of different temperatures in figure, the present invention is detected at T=25 DEG C, using T=25
DEG C curve；As seen from Figure 7, for each OppjIts corresponding W can be obtainedj。
The thickness of 16 corrector strips be followed successively by 5,6.25,7.5,8.75,10,11.25,12.5,
13.75,15,16.25,17.5,18.75,20,21.25,22.5,23.75.
Invention introduces reference sensor group, and use signal acquisition sensor group and the relative value of reference sensor group
Opp is as sampled result (Opp=Smp-Ref), because reference sensor group and reference sensor group are with the synchronous change of temperature, and
And the time due to sampling every time is very short, it is considered that temperature does not change within this time, therefore sampled result is just
Essentially eliminate the influence of temperature.
It should be understood that the present embodiment is only illustrative of the invention and is not intended to limit the scope of the invention.In addition, it is to be understood that
After having read the content of the invention lectured, those skilled in the art can make various changes or modifications to the present invention, these etc.
Valency form equally falls within the application appended claims limited range.
Claims (7)
1. a kind of detection method of ATM note detection device, ATM note detection device includes processor (1), display
(12), alarm (13), memory (14), fpga chip (2), signal acquisition circuit (3), fast pulley (4), on fast pulley
Portion and the floating roller (5) being brought into close contact with fast pulley, 2 roller bearings (6) being respectively arranged on fast pulley and floating roller, located at floating
The pcb board (7) of top is taken turns, the reference sensor group (8) corresponding with floating roller and signal acquisition pass on pcb board lower surface
Sensor group (9)；Reference sensor group includes m sensor coil (81), and signal acquisition sensor group includes n sensor coil, n=
5m, m >=3, m sensor coil of reference sensor group and n sensor coil of signal acquisition sensor group be arranged in order into
The vertical row in the coin-out direction of bank note；Each sensor coil is connected with 1 RC oscillating circuit (11), signal acquisition circuit
Output end of the input respectively with each RC oscillating circuits electrically connects, output end, fpga chip and the processing of signal acquisition circuit
Device is sequentially connected electrically, and processor electrically connects with display, alarm and memory respectively；It is characterized in that comprise the following steps：
The n sensor coil of (1-1) signal acquisition sensor group is divided into p=n/m group signal acquisition sensors, and the 1st group of signal is adopted
Collecting sensor, the 2nd group of signal acquisition sensor ..., pth group signal acquisition sensor, reference sensor group are arranged in order, and
The frequency of each group sensor coil increases successively；
1st group of signal acquisition sensor, the 2nd group of signal acquisition sensor ..., pth group signal acquisition sensor, reference sensor
The equal number consecutively of each sensor coil in group is S1, S2 ..., Sm；
When bank note is laterally slided between fast pulley and floating roller, floating roller floats upwards, causes the inductance of each sensor coil
Amount change；
(1-2)
(1-2-1) signal acquisition circuit is according to the 1st group of signal acquisition sensor, the 2nd group of signal acquisition sensor ..., pth group letter
Number collection sensor, reference sensor group sensor coil Si order gather successively each sensor coil RC oscillating circuits it is defeated
The signal gone out；Wherein, i initial value is 1；
(1-2-2) fpga chip obtains the sampled value Ref, the sampled value Smp of each group signal acquisition sensor of reference sensor1,
Smp2..., Smpp；
Utilize formula Oppj=Smpj- Ref is calculated and is obtained detected value Opp1, Opp2..., Oppp；Wherein, j is 1 ..., p；
(1-2-3) makes i values increase by 1, return to step (1-2-1) as i ＜ m；
(1-3) is by OppjInput in calibration curve model, the detected value W after calibration is calculated1, W2..., Wp, by W1,
W2..., WpIt is conveyed to processor；
(1-4) processor obtains m groups W1, W2..., Wp, it is provided with memory and m groups W1, W2..., WpRelated database, place
Manage m group W of the device according to detection1, W2..., WpInquire about database and obtain banknote thickness and corresponding bank note type judgement letter
Breath, display show that bank note type judges information, when it is adhesive tape coin or incomplete coin that display, which shows bank note, processor control report
Alert device alarm.
2. the detection method of ATM note detection device according to claim 1, it is characterized in that, each RC oscillating circuits
Include electric capacity C, resistance Rs and resistance RL；The termination capacitor C one end of resistance RL mono- is simultaneously grounded, and is adopted corresponding to another terminations of resistance RL
Collect sensor coil or benchmark sensor coil, resistance Rs mono- terminates VCC, and the resistance Rs other ends connect the electric capacity C other ends respectively, collection passes
Feel coil or the benchmark sensor coil other end.
3. the detection method of ATM note detection device according to claim 2, it is characterized in that, signal acquisition sensor
N sensor coil of group is divided into p=n/m group signal acquisition sensors, and the 1st group of signal acquisition sensor, the 2nd group of signal acquisition pass
Sensor ..., pth group signal acquisition sensor and reference sensor group are arranged in order, and the frequency of each group sensor coil is successively
Increase；
1st group of signal acquisition sensor, the 2nd group of signal acquisition sensor ..., pth group signal acquisition sensor and benchmark sensing
The capacitance of the RC oscillating circuits of each sensor coil in device group is sequentially reduced.
4. the detection method of ATM note detection device according to claim 3, it is characterized in that, m 5, described 1st group
Signal acquisition sensor, the 2nd group of signal acquisition sensor ..., in pth group signal acquisition sensor and reference sensor group before
Two sensor coils are in contact, and latter two sensor coil is in contact, the 3rd sensor coil and the 2nd sensor coil, the 3rd biography
Gap is equipped between sense coil and the 4th sensor coil.
5. the detection method of ATM note detection device according to claim 1, it is characterized in that, without bank note by when,
Spacing between floating roller and benchmark sensor coil, floating roller and signal acquisition sensor coil is 0.8 to 1.3mm.
6. the detection method of the ATM note detection device according to claim 1 or 2 or 3 or 4 or 5, it is characterized in that, institute
Calibration curve model is stated to obtain using following steps：
Increased f corrector strip laterally slides between fast pulley and floating roller (6-1) selection thickness successively successively, utilizes step
(1-1) to (1-2-3) obtains the m group detected values Opp of each corrector strip1, Opp2..., Oppp；
(6-2) calculates the m groups Opp of each corrector strip1, Opp2..., OpppAverage value OppIt is average, by the thickness q of each corrector strip
And OppIt is averageForm point (q, an OppIt is average), obtain f point (q, OppIt is average), consecutive points are connected in two-dimensional coordinate system,
Obtain calibration curve model.
7. the detection method of ATM note detection device according to claim 6, it is characterized in that, f is 15 to 21.
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| US10099878B1 (en) * | 2016-10-28 | 2018-10-16 | Ncr Corporation | Media infeed metal detection |
| CN107092772B (en) * | 2017-03-01 | 2019-12-10 | 深圳怡化电脑股份有限公司 | Method and device for determining characteristic curve of sensor |
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