CN104881924A - Integrated eddy-current banknote thickness detecting device and thickness detecting method - Google Patents
Integrated eddy-current banknote thickness detecting device and thickness detecting method Download PDFInfo
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- CN104881924A CN104881924A CN201510242569.3A CN201510242569A CN104881924A CN 104881924 A CN104881924 A CN 104881924A CN 201510242569 A CN201510242569 A CN 201510242569A CN 104881924 A CN104881924 A CN 104881924A
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- 238000000034 method Methods 0.000 title claims abstract description 10
- 230000009514 concussion Effects 0.000 claims abstract description 10
- 230000001052 transient effect Effects 0.000 claims description 4
- 230000009977 dual effect Effects 0.000 claims description 3
- 238000007689 inspection Methods 0.000 claims description 3
- 230000002123 temporal effect Effects 0.000 claims description 3
- 238000001514 detection method Methods 0.000 abstract description 10
- 239000002184 metal Substances 0.000 abstract description 4
- 230000008859 change Effects 0.000 abstract description 3
- 230000009286 beneficial effect Effects 0.000 abstract description 2
- 230000010354 integration Effects 0.000 abstract 1
- 238000010586 diagram Methods 0.000 description 4
- 238000012545 processing Methods 0.000 description 4
- 238000005516 engineering process Methods 0.000 description 3
- 238000013461 design Methods 0.000 description 2
- 230000000694 effects Effects 0.000 description 2
- 238000001914 filtration Methods 0.000 description 2
- 238000012986 modification Methods 0.000 description 2
- 230000004048 modification Effects 0.000 description 2
- 230000008569 process Effects 0.000 description 2
- 238000012937 correction Methods 0.000 description 1
- 239000013078 crystal Substances 0.000 description 1
- 230000007812 deficiency Effects 0.000 description 1
- 239000000428 dust Substances 0.000 description 1
- 230000007613 environmental effect Effects 0.000 description 1
- 239000012467 final product Substances 0.000 description 1
- 230000004907 flux Effects 0.000 description 1
- 239000000047 product Substances 0.000 description 1
- GOLXNESZZPUPJE-UHFFFAOYSA-N spiromesifen Chemical compound CC1=CC(C)=CC(C)=C1C(C(O1)=O)=C(OC(=O)CC(C)(C)C)C11CCCC1 GOLXNESZZPUPJE-UHFFFAOYSA-N 0.000 description 1
Classifications
-
- G—PHYSICS
- G07—CHECKING-DEVICES
- G07D—HANDLING OF COINS OR VALUABLE PAPERS, e.g. TESTING, SORTING BY DENOMINATIONS, COUNTING, DISPENSING, CHANGING OR DEPOSITING
- G07D7/00—Testing specially adapted to determine the identity or genuineness of valuable papers or for segregating those which are unacceptable, e.g. banknotes that are alien to a currency
- G07D7/16—Testing the dimensions
- G07D7/164—Thickness
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- General Physics & Mathematics (AREA)
- Measurement Of Length, Angles, Or The Like Using Electric Or Magnetic Means (AREA)
- Investigating Or Analyzing Materials By The Use Of Magnetic Means (AREA)
Abstract
The invention discloses an integrated eddy-current banknote thickness detecting device, which comprises a baseboard, on which a metal block is arranged, in linkage connection with a loose roll assembly; an eddy-current coil, corresponding to the metal block, fixedly arranged above the baseboard; an LDC 1000 integrated chip; and a controller. The LDC 1000 integrated chip provides AC concussion current output to the eddy-current coil, collects variation of coil inductance due to change of distance between the metal block and the eddy-current coil, and outputs the variation to the controller. The integrated chip adopted in the invention is good in practicality, and can well filter electrical disturbance of outside noises on a weak signal of banknote thickness. The device and method in the invention are preferably suitable for financial industries via collecting banknote thickness information; and a precise eddy-current sensor is used for detection, wherein the sensor is small in detection range, high in detection precision, and high in integration. The number of a pile of banknote can be analyzed according to the generated signal, and later analysis treatment is beneficial to carry out.
Description
Technical field
The present invention relates to financial automation services field of terminal technology, particularly relate to a kind of integrated electric vortex type bank note thickness detecting device and examine thick method.
Background technology
In order to ensure accurate to the banknote counting of process in cash handling device (paper money counter, circulator, cleaning-sorting machine etc.), all possesses thickness detection apparatus, the effect of thickness detection apparatus in cash handling device is the thickness detecting flaky medium, the i.e. thickness of bank note, obtain the feature that the thickness of bank note not only can be used for judging whether to meet true bank note, but also carry out the accuracy that counts when can ensure that bank note is separated and transmits, provide safeguard for cash process arranges quantitatively and the qualitatively bank note provided.Current cash handling device, the general ultrasonic sensor that adopts detects thickness, and the type sensor is comparatively large by the impact of working environment (especially dust), so environmental suitability is poor.
Current eddy current detection technology, because oscillating circuit, amplifying circuit, collection and filtering circuit etc. build by separate type device, the interference being easy to introducing noise in input link in inevitable face, and because sense channel number is more, cause sensor internal circuit huge, cost is higher, and physical dimension is bigger than normal, is not easy to install and product Miniaturization Design.
Summary of the invention
The object of the invention is the technological deficiency for existing in prior art, and a kind of integrated electric vortex type bank note thickness detecting device is provided and examines thick method.
The technical scheme adopted for realizing object of the present invention is:
A kind of integrated electric vortex type bank note thickness detecting device, comprise and to link with loose roll assembly and to be provided with the base plate of derby, be fixedly installed on eddy-current coils above base plate and corresponding with derby, and LDC1000 integrated chip and controller, described LDC1000 integrated chip provides to eddy-current coils and exchanges concussion electric current and export and gather because derby and eddy-current coils are apart from changing the variable quantity of the coil inductance caused and exporting to controller simultaneously.
Also comprise be arranged on eddy-current coils input before or export after and the timesharing gating circuit be communicated with controller, described LDC1000 integrated chip and timesharing gating circuit one_to_one corresponding are arranged, timesharing gating circuit successively staggered export interchange concussion electric current to each eddy-current coils or eddy-current coils exported be communicated to LDC1000 integrated chip and disturb to avoid the transient magnetic field of adjacency channel.
Described timesharing gating circuit comprises two groups of analog channel gating chips, and its dual numbers passage and odd chanel carry out temporal timesharing gating and interval strobe spatially.
Described eddy-current coils is formed by the coiling of circuit printing plate cabling.
The top layer of circuit printing plate and bottom are respectively arranged with coil, and two-layer coil is communicated with by through track.
Utilize the thick method of the inspection of bank note thickness detecting device, 1) LDC1000 integrated chip output AC concussion electric current export timesharing gating circuit to eddy-current coils;
2) wherein part eddy-current coils is shaken flow conducting with exchanging of LDC1000 integrated chip by timesharing gating circuit one by one;
3) collection of LDC1000 integrated chip is because derby and eddy-current coils are apart from changing the variable quantity of the coil inductance caused and exporting this variable quantity to controller;
4) controller judges whether folded paper money according to the voltage range of this variable quantity and has several wad of bills;
5) controller controls the switching of timesharing gating circuit on off operating mode;
6) step 2 is repeated) to 5) until terminate.
Compared with prior art, the invention has the beneficial effects as follows:
The present invention adopts integrated chip, practical, well can leach the electrical Interference of outside noise to stiff thickness feeble signal, this invention can adapt to financial industry preferably by the collection to stiff thickness information, use accurate eddy current sensor to detect, and this sensor sensing range is little, accuracy of detection is high, integrated height, the signal according to producing can analyze folded cash amount, is conducive to the later stage and carries out analyzing and processing.
Accompanying drawing explanation
Figure 1 shows that the structural representation of integrated electric vortex type bank note thickness detecting device of the present invention;
Figure 2 shows that the connection diagram of even-numbered channels multi-path choice;
Figure 3 shows that the connection diagram of odd chanel multi-path choice;
Figure 4 shows that timesharing gating module enable signal produces circuit diagram;
Figure 5 shows that LDC1000 integrated chip connection diagram.
Embodiment
Below in conjunction with the drawings and specific embodiments, the present invention is described in further detail.Should be appreciated that specific embodiment described herein only in order to explain the present invention, be not intended to limit the present invention.
As Figure 1-5, integrated electric vortex type bank note thickness detecting device of the present invention comprises and to link with loose roll assembly and it to be arranged the base plate of derby, be fixedly installed on eddy-current coils above base plate and corresponding with derby, and LDC1000 integrated chip, as LDC1000NHR, and controller, described LDC1000 integrated chip provides the output of interchange concussion electric current to gather because derby and eddy-current coils distance change the variable quantity of the coil inductance caused and export to controller to eddy-current coils simultaneously, wherein, also comprise the timesharing gating circuit before being arranged on eddy-current coils input, described LDC1000 integrated chip and timesharing gating circuit one_to_one corresponding are arranged, timesharing gating circuit is staggered successively to be exported interchange concussion electric current to each eddy-current coils and disturbs to avoid the transient magnetic field of adjacency channel.Specifically, LDC1000 integrated chip, 8M crystal is used to produce clock reference, by the scanning to all passages, the distance variable quantity monitored between tested metal and eddy-current coils can be realized, and can directly read this variable quantity by CPU by SPI digital interface, realize the detection of stiff thickness.Certainly, described timesharing gating circuit also can be arranged between the output of eddy-current coils and LDC1000 integrated chip, goes the above-mentioned effect of channel equally.
Preferably, described timesharing gating circuit comprises two groups of analog channel gating chips, and its dual numbers passage and odd chanel carry out temporal timesharing gating and interval strobe spatially.
The present invention adopts integrated special chip, practical, well can leach the electrical Interference of outside noise to stiff thickness feeble signal, this invention can adapt to financial industry preferably by the collection to stiff thickness information, use accurate eddy current sensor to detect, and this sensor sensing range is little, accuracy of detection is high, integrated height, the signal according to producing can analyze folded cash amount, is conducive to the later stage and carries out analyzing and processing.
Specifically, described eddy-current coils is formed by the coiling of circuit printing plate cabling, the top layer of circuit printing plate and bottom are respectively arranged with coil, two-layer coil is communicated with by through track, coil is set directly on circuit board and two circle designs of corresponding connection up and down, improve the detection accuracy of flux change, for subsequent analysis processing signals provides the foundation.
Utilize the thick method of the inspection of above-mentioned bank note thickness detecting device, specific as follows,
1) LDC1000 integrated chip output AC concussion electric current exports timesharing gating circuit to eddy-current coils, as the 74HC4051 of data gating module;
2) wherein part eddy-current coils is shaken flow conducting with exchanging of LDC1000 integrated chip by timesharing gating circuit one by one; As adopted the eddy-current coils of two 74HC4051 corresponding odd bits of difference and even bit, switch to the eddy-current coils energy supply alternately energy supply one by one of even bit after then the eddy-current coils of 74HC4051 control odd bits replaces energy supply one by one again, timesharing subregion gating avoids the transient magnetic field of adjacency channel to disturb; Because the E pin of 74HC4051 is chip enable signal, high level is effective, and two 74HC4051 modules are undertaken enable by S3, and when S3 is high time, gating one, produces reverse low level/S3 signal simultaneously, forbid another one, otherwise on the contrary.As shown in Figure 2, controller produces a voltage control signal S3, and this voltage control signal accesses the base stage of triode Q1 through resistance R27, the grounded drain of described triode Q1, collector is communicated with 5V supply voltage through resistance R26, and the output that collector is drawn simultaneously is /S3
3) collection of LDC1000 integrated chip is because derby and eddy-current coils are apart from changing the variable quantity of the coil inductance caused and exporting this variable quantity to controller; This variable quantity is a magnitude of voltage, because when the banknote of different-thickness passes through, the amount of movement that derby occurs is different, then corresponding variable quantity is different,
4) controller judges whether folded paper money according to the voltage range of this variable quantity and has several wad of bills; The magnitude of voltage of the variable quantity after filtering after Shape correction gets final product the thickness that direct correspondence goes out banknote, can analyze whether fold paper money from this one-tenth-value thickness 1/10 like this, and the quantity of folded paper money, two or three or four, the data processing like this for the later stage provides basis.
5) controller controls the switching of timesharing gating circuit on off operating mode;
6) step 2 is repeated) to 5) until terminate.
The above is only the preferred embodiment of the present invention; it should be pointed out that for those skilled in the art, under the premise without departing from the principles of the invention; can also make some improvements and modifications, these improvements and modifications also should be considered as protection scope of the present invention.
Claims (6)
1. an integrated electric vortex type bank note thickness detecting device, it is characterized in that, comprise and to link with loose roll assembly and to be provided with the base plate of derby, be fixedly installed on eddy-current coils above base plate and corresponding with derby, and LDC1000 integrated chip and controller, described LDC1000 integrated chip provides to eddy-current coils and exchanges concussion electric current and export and gather because derby and eddy-current coils are apart from changing the variable quantity of the coil inductance caused and exporting to controller simultaneously.
2. bank note thickness detecting device as claimed in claim 1, it is characterized in that, also comprise be arranged on eddy-current coils input before or export after and the timesharing gating circuit be communicated with controller, described LDC1000 integrated chip and timesharing gating circuit one_to_one corresponding are arranged, timesharing gating circuit successively staggered export interchange concussion electric current to each eddy-current coils or eddy-current coils exported be communicated to LDC1000 integrated chip and disturb to avoid the transient magnetic field of adjacency channel.
3. bank note thickness detecting device as claimed in claim 2, it is characterized in that, described timesharing gating circuit comprises two groups of analog channel gating chips, and its dual numbers passage and odd chanel carry out temporal timesharing gating and interval strobe spatially.
4. bank note thickness detecting device as claimed in claim 1, it is characterized in that, described eddy-current coils is formed by the coiling of circuit printing plate cabling.
5. bank note thickness detecting device as claimed in claim 4, it is characterized in that, the top layer of circuit printing plate and bottom are respectively arranged with coil, and two-layer coil is communicated with by through track.
6. utilize the thick method of the inspection of the bank note thickness detecting device described in claim 2, it is characterized in that,
1) LDC1000 integrated chip output AC concussion electric current exports timesharing gating circuit to eddy-current coils;
2) wherein part eddy-current coils is shaken flow conducting with exchanging of LDC1000 integrated chip by timesharing gating circuit one by one;
3) collection of LDC1000 integrated chip is because derby and eddy-current coils are apart from changing the variable quantity of the coil inductance caused and exporting this variable quantity to controller;
4) controller judges whether folded paper money according to the voltage range of this variable quantity and has several wad of bills;
5) controller controls the switching of timesharing gating circuit on off operating mode;
6) step 2 is repeated) to 5) until terminate.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201510242569.3A CN104881924A (en) | 2015-05-13 | 2015-05-13 | Integrated eddy-current banknote thickness detecting device and thickness detecting method |
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| CN201510242569.3A CN104881924A (en) | 2015-05-13 | 2015-05-13 | Integrated eddy-current banknote thickness detecting device and thickness detecting method |
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Cited By (5)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN105374106A (en) * | 2015-11-04 | 2016-03-02 | 东方通信股份有限公司 | ATM bank note detection apparatus and detection method |
| CN105427447A (en) * | 2015-11-04 | 2016-03-23 | 东方通信股份有限公司 | ATM paper currency detection device and method |
| CN105809813A (en) * | 2016-04-14 | 2016-07-27 | 广州市汇研微电子技术有限公司 | Banknote detection device |
| CN107272072A (en) * | 2017-07-03 | 2017-10-20 | 西京学院 | A kind of binary channels metal detector and its survey device method |
| CN108038956A (en) * | 2017-12-26 | 2018-05-15 | 深圳怡化电脑股份有限公司 | Paper money safety line detection method and device |
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Cited By (6)
| Publication number | Priority date | Publication date | Assignee | Title |
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| CN105427447A (en) * | 2015-11-04 | 2016-03-23 | 东方通信股份有限公司 | ATM paper currency detection device and method |
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| CN107272072A (en) * | 2017-07-03 | 2017-10-20 | 西京学院 | A kind of binary channels metal detector and its survey device method |
| CN108038956A (en) * | 2017-12-26 | 2018-05-15 | 深圳怡化电脑股份有限公司 | Paper money safety line detection method and device |
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