CN101996433B - Thickness identification device of slice-type medium and identification method thereof - Google Patents
Thickness identification device of slice-type medium and identification method thereof Download PDFInfo
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- CN101996433B CN101996433B CN201010295247A CN201010295247A CN101996433B CN 101996433 B CN101996433 B CN 101996433B CN 201010295247 A CN201010295247 A CN 201010295247A CN 201010295247 A CN201010295247 A CN 201010295247A CN 101996433 B CN101996433 B CN 101996433B
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Abstract
The invention relates to the field of medium thickness detection, in particular to a thickness identification device of a slice-type medium and an identification method thereof. By means of the provided thickness identification device of the slice-type medium, the problem of low measurement reliability of the existing thickness identification device of the slice-type medium is solved. The thickness identification device of the slice-type medium comprises a thickness measurement module, a data storage module, a data correction module and an identification module, wherein, the thickness measurement module acquires the thickness measurement information of the slice-type medium; the data storage module stores standard thickness data and reference nominal data of measured data; the data correction module carries out data correction on the thickness measurement information acquired by the thickness measurement module according to the reference nominal data so as to obtain thickness detection data of the slice-type medium; and the identification module compares the thickness detection data with the standard thickness data so as to complete thickness identification of the slice-type medium. In the invention, by correcting the measurement information, measurement errors are reduced, the identification accuracy of financial service equipment is improved, and identification robustness of negotiable documents is enhanced.
Description
Technical field
The present invention relates to the dielectric thickness detection range, particularly a kind of flaky medium thickness identification device and discrimination method.
Background technology
In the truth identification process to bank note in the existing financial services equipment, the thickness of bank note is requisite discriminating means.Thin slice class value document comes the general thin slice shape medium that all adopts special material to become to have the certain thickness characteristic at present, and the counterfeit value document that occurs at present, splicing value document are all managing to forge this thickness diagnostic characteristics to cheat the detection of common finance device to this kind diagnostic characteristics.Therefore, in financial services equipment, the reliable discriminating of value document thickness is differentiated significant to the value document authenticity.The detection of flaky medium thickness is the important evidence of fully separating and counting of financial services equipment to medium in addition.
At present general Mechanical Contact value document thickness identification method mainly is that relative motion through driving part and slave unit realizes.As shown in Figure 1, driving part is meant the benchmark roller 2 that is installed on the main drive shaft 1; Slave unit is mounted on another axle, and the driven detection roller 3 that the pressing force that is passed over by benchmark roller 2 orders about detects roller 3 and can float.Between benchmark roller 2 and detection roller 3, carry value document, displacement transducer 4 is measured two gaps between roller according to the floating displacement amount that detects roller 3, obtains the thickness information of value document.
According to Fig. 1; Value document thickness measure module includes the benchmark roller and detects roller with floating; When value document passes through between two rollers; The displacement of driven detection roller fluctuates, and identification module utilizes displacement detecting element (displacement transducer) to obtain to float and detects the change in displacement of roller, obtains the thickness change information of current value document material.
There is following problem in above-mentioned prior art:
(1) because of the machining accuracy problem, main drive shaft is not a circular shaft standard, desirable, and the main drive shaft closed curve that forms that rotates a circle is not desirable, a standard circumference, and promptly under different rotatable phase angles, the radius of closed surface each point is unequal.The benchmark roller is fixed on the main drive shaft, with the main drive shaft concentric motion.Therefore, it is not constant value that the benchmark roller passes to the pressing force benchmark that detects roller, is the value that changes in the cycle.For tested object same, the thickness uniformity, detect the measurement result of roller under the different rotary phase place and have inconsistency, i.e. the output of thickness measure module is to change in the cycle.
(2) because of problems such as material lifetime or service wears; Wearing and tearing in the surface of benchmark roller, causes the detection surface of contact of benchmark roller rough, so; The benchmark roller closed curve that forms that rotates a circle is not desirable, a standard circumference, and the radius of closed curve each point is unequal.Therefore, it is not constant that the benchmark roller passes to the pressing force benchmark that detects roller, but the cycle variation.For tested object same, the thickness uniformity, it is inconsistent to detect the measurement result of roller under different rotatable phase angles, i.e. the output of thickness measure module is to change in the cycle.
(3) because of problems such as material lifetime or service wears, wear and tear in the surface of detecting roller, and the detection surface of contact that causes detecting roller is rough; Detecting the roller closed curve that forms that rotates a circle is not desirable, a standard circumference, and the radius of closed curve each point is unequal.Under different rotatable phases, the pressing force that the detection roller receives is not constant, but the cycle variation.For tested object same, the thickness uniformity, it is inconsistent to detect the measurement result of roller under different rotatable phase angles, i.e. the output of thickness measure module is to change in the cycle.
The problems referred to above are detected for value document thickness and bring error, have changed the output valve that value document thickness detects.As shown in Figure 2, when two roller clamping standard original copys or unloaded the rotation, Fig. 2 (a) is the desirable output signal of thickness measure module, is a straight line that is parallel to the longitudinal axis.But owing to detect the measurement output of roller is not constant, causes actual Fig. 2 of being output as (b) of thickness measure module, the curve of a cycle variation.When measuring value document thickness,, then can cause measuring the actual value of output master-hand detected object when the benchmark roller perhaps detects the contacted local convexity of roller and detected object; When the benchmark roller perhaps detects local dented that roller contacts with detected object, then can cause measuring the actual value that output valve is lower than detected object.No matter which kind of situation all can be brought measuring error, reduces the measuring accuracy of thickness measure module.
Because there are the problems referred to above in the thickness measure module, for the financial services equipment that adopts the thickness measure module as the value document basis of characterization, the erroneous judgement phenomenon takes place inevitably, influenced the acceptance rate of financial services equipment.
Summary of the invention
The low problem of reliable measurement property based on above-mentioned flaky medium thickness identification device existence; The present invention proposes a kind of improved flaky medium thickness identification device and discrimination method thereof; Through demarcation and adaptively correcting to measuring basis; To improve the detection accuracy of flaky medium thickness identification device, strengthen financial services equipment to the thin slice class have the valency media processes reliability and stability.
This flaky medium thickness identification device comprises:
One thickness measure module; Be used to gather the thickness measure information of flaky medium; It comprises that one is installed in the benchmark roller on the main drive shaft, and the driven detection roller and that is installed on the unsteady driven shaft is gathered the sensor of driven detection roller floating displacement data;
One data memory module is used for the benchmark calibration data of storage standards thickness data and measurement data;
One adjustment of data module, the thickness measure information that is used for the thickness measure module is gathered is accomplished the adjustment of data according to the said reference nominal data, and the thickness that forms flaky medium detects data; And
One identification module is used for above-mentioned thickness detection data and above-mentioned standard thickness data are compared, and accomplishes flaky medium thickness and differentiates.
Preferably, said thickness measure module comprises one with the benchmark roller or detect the coaxial rotatable phase detection part of roller, is used for writing down the benchmark roller or detects the corresponding thickness measure information of gathering of each phase place of roller rotary course.
Further, said rotatable phase detection part comprises one with the benchmark roller or detect a coaxial code-disc and the code-disc information reading sensor of roller, and said code-disc is provided with a phase mark position.
Preferably, said phase mark position is a light hole of offering on the code-disc.
Preferably, also be provided with at least one transmittance and different phase hole, phase mark position on the said code-disc.
Preferably, said phase place hole is 10 to 30.
Preferably, said code-disc information reading sensor is a pair of light emitter and the light-receiving utmost point that is installed in the code-disc both sides respectively.
Optional, said phase mark position is for being coated on the lip-deep light absorbent point of code-disc.
Preferably, also be provided with the phase point that at least one is formed by the absorptance light absorbent point different with the absorptance of phase mark position on the said code-disc surface, said phase mark position, phase point and code-disc central point are apart from identical.
Preferably, said phase point is 10 to 30.
Further, said code-disc information reading sensor is a pair of light emitter and the light-receiving utmost point that is installed in code-disc coating light absorbent one side.
In addition, the present invention also provides a kind of flaky medium thickness discrimination method, and it comprises the steps:
Further, said thickness measure information comprise the benchmark roller or detect roller rotatable phase angle with and corresponding displacement data.
Further, the said benchmark calibration data of storage in advance comprise benchmark roller when not having medium to pass through or detect each rotatable phase angle of roller with and corresponding displacement data.
Beneficial effect of the present invention is: the correction through to metrical information, reduced measuring error, and improve the identification precision of financial services equipment, strengthen the robustness of value document identification.
Description of drawings
Fig. 1 is a Mechanical Contact formula thickness detection mechanism structural drawing;
Fig. 2 is the output signal diagram of Mechanical Contact formula thickness detection mechanism;
Fig. 3 is a flaky medium thickness identification device Organization Chart provided by the invention;
Fig. 4 is thickness measure modular structure figure provided by the invention;
Fig. 5 is a kind of code-disc structural drawing provided by the invention;
Fig. 6 is code-disc phase signal figure provided by the invention;
Fig. 7 is a kind of flaky medium thickness discrimination method process flow diagram provided by the invention.
Embodiment
Specify flaky medium thickness identification device provided by the invention and recognition methods below in conjunction with diagram.
Consult Fig. 3 and Fig. 4; Flaky medium thickness identification device Organization Chart provided by the invention and thickness measure modular structure figure, this flaky medium thickness identification device 10 comprise a thickness measure module 11, a data memory module 12, an adjustment of data module 13 and an identification module 14.Said thickness measure module 11 is used to gather the thickness measure information of flaky medium; It comprises that one is installed in benchmark roller 112, on the main drive shaft 111 and is installed in the sensor 115 that driven detection roller 114 and on the unsteady driven shaft 113 is gathered driven detection roller 114 displacement datas; Said data memory module 12 is used for the benchmark calibration data of storage standards thickness data and measurement data; Said adjustment of data module 13 is used for the thickness measure information that thickness measure module 11 is gathered is accomplished the adjustment of data according to the said reference nominal data, and the thickness that forms flaky medium detects data; And said identification module 14, be used for above-mentioned thickness detection data and above-mentioned standard thickness data are compared, accomplish flaky medium thickness and differentiate.Wherein main drive shaft 111 drive installations benchmark roller 112 above that rotates; Benchmark roller 112 drives driven detection roller 114 through pressing force; Detect roller 114 and fluctuate, thereby displacement transducer 115 is measured the thickness measure information that two roller spacings obtain flaky medium according to the floating displacement amount that detects roller 114 owing to the thickness that pinches medium is different.
In order to obtain benchmark roller 112 and the cyclical variation situation that detects roller 114 thickness measure information when pinching flaky medium; As shown in Figure 4; The present invention is provided with the phase-detection parts 116 of the rotatable phase of record benchmark roller 112 on the main drive shaft 111 of reference for installation roller 112, phase-detection parts 116 are used for writing down the corresponding thickness measure information of gathering of each phase place of benchmark roller 112 rotary courses.These phase-detection parts 116 comprise code-disc 1161 and a code-disc information reading sensor 1162 coaxial with benchmark roller 112.
Consult Fig. 5, a kind of code-disc structural drawing provided by the invention offers a light hole 11611 as the phase mark position on this code-disc 1161, and transmittance and light hole 11611 different phase holes 11612.Wherein its number is set in phase place hole 11612 as required, and present speed according to the AD data-switching is preferably 10 to 30 and is advisable.In order to realize the transmittance difference in phase mark position and phase place hole, the solution that present embodiment provides be light hole width with vary in size to reach the different of transmittance.Wherein all light holes are the through hole of radially offering, and it centers on the code-disc central distribution on code-disc.To this kind code-disc, code-disc information reading sensor 1162 is an infrared correlation sensor, and it comprises a pair of light emitter and the light-receiving utmost point that is installed in code-disc 1161 both sides respectively.Code-disc 1161 forms in rotary course the blocking and unshielding of infrared correlation sensor, to accomplish the rotatable phase angle record to benchmark roller 112 rotatable phases.In order to realize the difference of transmittance, also can establish the light-transmissive film of a part of extinction on any at onesize through hole.Certainly in order to reach same phase mark purpose; Can also be at code-disc surface coated 1 light absorbent point as the phase mark position; And the phase point of the absorptance light absorbent point conduct different with the absorptance of phase mark position, phase mark position, phase point and code-disc central point are apart from identical.Corresponding therewith, the code-disc information reading sensor is a pair of light emitter and the light-receiving utmost point that is installed in code-disc coating light absorbent one side.
As shown in Figure 6, the phase signal figure of the code-disc 1161 of employing different in width light hole is during code-disc 1161 rotations; The light that infrared correlation sensor luminous component sends is periodically blocked; Light-receiving member periodically is output as photoreceptor signal, because the through hole of same widths is adopted in phase place hole 11612, and marker bit light hole 11611 width are greater than phase place hole 11612; So the duty width greater than flag position light hole 11611 of the photoreceptor signal that infrared correlation sensor acquisition arrives when 11612 positions, phase place hole; Therefore, according to the output characteristic of above-mentioned photoreceptor signal, search location phase mark bit position is easy to accomplish.Square-wave signal among Fig. 6 between marker bit output signal A and the marker bit output signal B; It is the sensitization output signal of code-disc infrared correlation sensor light receiving pole when rotating a circle; Promptly judge the rotatable phase of code-disc according to this square-wave signal, the thickness measurement data of the flaky medium of gathering during in view of the above with the rotatable phase of benchmark roller 112 and this phase place is carried out corresponding record.
Below in conjunction with Fig. 7, a kind of flaky medium thickness discrimination method process flow diagram provided by the invention further specifies the principle of work of above-mentioned flaky medium thickness identification device.
The basic step of this flaky medium thickness discrimination method is:
S1, the thickness measure information of gathering flaky medium through the thickness measure module;
S2 accomplishes the adjustment of data through the thickness measure information that adjustment of data module is gathered the thickness measure module according to the benchmark calibration data of storage in advance, and the thickness that forms flaky medium detects data;
S3 compares above-mentioned thickness detection data and standard thickness data through identification module, accomplishes flaky medium thickness and differentiates.
Wherein, said thickness measure information comprise the benchmark roller or detect roller rotatable phase angle with and corresponding displacement data; The said benchmark calibration data of storage in advance comprise benchmark roller when not having medium to pass through or detect each rotatable phase angle of roller with and corresponding displacement data.
Concrete, when flaky medium during through thickness measure module of the present invention, phase-detection parts 116 can accurately obtain the rotatable phase θ of main drive shaft 111, benchmark roller 112
j, and with this rotatable phase θ
jPass to adjustment of data module 13.Displacement data sensor 115 is measured corresponding rotatable phase angle θ
jUnder thickness measure information y
j, and with this thickness measure information y
jSend adjustment of data module 13 to.Adjustment of data module 13 reads benchmark calibration data ε (θ) and check and correction formula from data memory module 13, and calculates and form thickness according to updating formula
and detect data
Flaky medium is fully through after the thickness measure module 13, obtains one group of thickness and detects data:
and send this group thickness detection data Y to identification module 14.Identification module 14 reads standard thickness numerical value S and the discriminating of accomplishing flaky medium is handled from data memory module 12, discriminating provided by the invention is handled and adopted P norm measure similarity: || S-Y||
PWhether≤ξ becomes Rob Roy to carry out whether legal judgement of flaky medium, wherein, and 0.1≤ζ≤0.5.
The benchmark calibration data obtain through following method in the discrimination method of above-mentioned flaky medium:
When the initialization of thin slice class thickness identification device; Or control down automatically or artificially as required; Benchmark roller in the thickness measure module 13 112 is carried out one week of no-load running, obtain thickness measure module 13 thickness measure information (y under benchmark roller 112 each rotatable phase when having no medium to pass through
j, θ
j), this thickness measure information (y
j, θ
j) be the benchmark calibration data ε (θ) of benchmark roller 112.
Certainly for accurate more and handled easily, thickness measure information (y
j, θ
j) be benchmark roller 112 to be carried out N metrical information that period run obtains do to get after medium filtering is handled, concrete,
Make the metrical information in i cycle represent as follows:
(y
i1，θ
1)，(y
i2，θ
2)，···，(y
im，θ
m)，(i＝1，2，···，N)，
Note Y
1=[y
I1, y
I2,, y
Im], (i=1,2,, N),
The metrical information in N cycle is made medium filtering handles, be shown below:
Y
1=[y
I1, y
I2,, y
Im] substitution formula (1), and launch to obtain
Press following formula filtering, obtain benchmark calibration data ε (θ): (y
1, θ
1), (y
2, θ
2),, (y
m, θ
m).
Certainly can also adopt for the acquisition of the benchmark calibration data ε (θ) of this flaky medium identification device and artificially demarcate through reference fluid; Concrete; The reference fluid of standard thickness is sent into thin slice class thickness identification device, and thickness measure module 13 is gathered reference fluid metrical information (y under each phase place when 112 rollings of benchmark roller pinch that this known thickness is c
j, θ
j), making medium filtering and handle pinching metrical information that 112 rotations of benchmark roller in the process of finishing N cycle gather, the m that obtains one-period m phase place correspondence organizes measurement data: (y
1, θ
1), (y
2, θ
2),, (y
m, θ
m); Ask under one-period, each phase place error compensation data separately according to known thickness c then: ε (θ
i)=y
i-c.
It is to be noted that the above is merely preferred embodiment of the present invention, for adopting other average modes to obtain in the procurement process of reference data, thickness can also adopt other data way of contrast when differentiating.Therefore all other impartial variations and modification of being done according to claim scope of the present invention all should belong to the covering scope of claim of the present invention.
Claims (13)
1. flaky medium thickness identification device, it comprises:
One thickness measure module; Be used to gather the thickness measure information of flaky medium; It comprises that one is installed in the benchmark roller on the main drive shaft, and the driven detection roller and that is installed on the unsteady driven shaft is gathered the sensor of driven detection roller floating displacement data;
One data memory module is used for the benchmark calibration data of storage standards thickness data and measurement data, these benchmark calibration data comprise when not having medium to pass through the benchmark roller or detect each rotatable phase angle of roller with and corresponding displacement data;
One adjustment of data module, the thickness measure information that is used for the thickness measure module is gathered is accomplished the adjustment of data according to said reference nominal data and following updating formula, and the thickness that forms flaky medium detects data,
Thickness detects data=thickness measure information-benchmark calibration data
And
One identification module is used for above-mentioned thickness detection data and above-mentioned standard thickness data are compared, and accomplishes flaky medium thickness and differentiates.
2. flaky medium thickness identification device as claimed in claim 1 is characterized in that, said thickness measure module comprises that one is used to gather the rotatable phase detection part of benchmark roller or detection roller rotatable phase parameter.
3. flaky medium thickness identification device as claimed in claim 2; It is characterized in that; Said rotatable phase detection part comprises one with the benchmark roller or detect the code-disc information reading sensor that the coaxial code-disc and of roller is used to detect the code-disc phase place, and said code-disc is provided with a phase mark position.
4. flaky medium thickness identification device as claimed in claim 3 is characterized in that, said phase mark position is a light hole of offering on the code-disc.
5. flaky medium thickness identification device as claimed in claim 4 is characterized in that, also is provided with at least one transmittance and different phase hole, phase mark position on the said code-disc.
6. flaky medium thickness identification device as claimed in claim 5 is characterized in that, said phase place hole is 10 to 30.
7. like the arbitrary described flaky medium thickness identification device of claim 4 to 6, it is characterized in that said code-disc information reading sensor is a pair of light emitter and the light-receiving utmost point that is installed in the code-disc both sides respectively.
8. flaky medium thickness identification device as claimed in claim 3 is characterized in that, said phase mark position is for being coated on the lip-deep light absorbent point of code-disc.
9. flaky medium thickness identification device as claimed in claim 8; It is characterized in that; Also be provided with the phase point that at least one is formed by the absorptance light absorbent point different with the absorptance of phase mark position on the said code-disc surface, said phase mark position, phase point and code-disc central point are apart from identical.
10. flaky medium thickness identification device as claimed in claim 9 is characterized in that, said phase point is 10 to 30.
11., it is characterized in that said code-disc information reading sensor is a pair of light emitter and the light-receiving utmost point that is installed in code-disc coating light absorbent one side like the arbitrary described flaky medium thickness identification device of claim 8 to 10.
12. the discrimination method of a flaky medium thickness identification device as claimed in claim 1, it comprises the steps:
Step 1, the thickness measure information of gathering flaky medium through the thickness measure module;
Step 2 is accomplished the adjustment of data through the thickness measure information that adjustment of data module is gathered the thickness measure module according to the benchmark calibration data of storage in advance, and the thickness that forms flaky medium detects data;
Step 3 is compared above-mentioned thickness detection data and standard thickness data through identification module, accomplishes flaky medium thickness and differentiates.
13. flaky medium thickness discrimination method as claimed in claim 12 is characterized in that, said thickness measure information comprise the benchmark roller or detect roller rotatable phase angle with and corresponding displacement data.
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| CN102722933B (en) | 2012-06-11 | 2014-08-20 | 广州广电运通金融电子股份有限公司 | Device for detecting thickness of sheet medium and method thereof |
| CN103106729B (en) | 2012-12-24 | 2015-05-13 | 广州广电运通金融电子股份有限公司 | Sheet type medium thickness identifying device and identifying method thereof |
| CN105093353B (en) * | 2014-05-04 | 2018-02-02 | 山东新北洋信息技术股份有限公司 | The bearing calibration of sensor and media processing device in media processing device |
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| CN105225334A (en) * | 2015-10-27 | 2016-01-06 | 深圳怡化电脑股份有限公司 | The bearing calibration of banknote tester |
| CN106067213B (en) * | 2016-05-25 | 2019-02-01 | 深圳怡化电脑股份有限公司 | A kind of device for detecting thickness of medium and method |
| CN106780988B (en) * | 2017-02-17 | 2023-04-28 | 深圳怡化电脑股份有限公司 | Paper currency floating conveying device and automatic teller machine |
| CN106898079B (en) * | 2017-03-17 | 2019-09-20 | 深圳怡化电脑股份有限公司 | A kind of method, apparatus and system of banknote thickness detection |
| CN107246859A (en) * | 2017-05-17 | 2017-10-13 | 公安部物证鉴定中心 | A kind of method identified adhesive tape |
| CN107680244B (en) * | 2017-11-22 | 2024-06-14 | 深圳怡化电脑股份有限公司 | Thickness detection device of medium and medium identification terminal |
| CN109658586B (en) * | 2018-11-20 | 2021-04-23 | 广州广电运通金融电子股份有限公司 | Method and device for calibrating number of sheet-like stackable objects and computer equipment |
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