EP2376865A1 - Vorrichtung zum feststellen einer dicke oder dickenvaration eines flachen gegenstandes - Google Patents
Vorrichtung zum feststellen einer dicke oder dickenvaration eines flachen gegenstandesInfo
- Publication number
- EP2376865A1 EP2376865A1 EP09804250A EP09804250A EP2376865A1 EP 2376865 A1 EP2376865 A1 EP 2376865A1 EP 09804250 A EP09804250 A EP 09804250A EP 09804250 A EP09804250 A EP 09804250A EP 2376865 A1 EP2376865 A1 EP 2376865A1
- Authority
- EP
- European Patent Office
- Prior art keywords
- coil
- guide element
- coils
- guide
- guide elements
- Prior art date
- Legal status (The legal status is an assumption and is not a legal conclusion. Google has not performed a legal analysis and makes no representation as to the accuracy of the status listed.)
- Ceased
Links
- 230000005540 biological transmission Effects 0.000 claims description 16
- 238000011156 evaluation Methods 0.000 claims description 15
- 239000003990 capacitor Substances 0.000 claims description 7
- 238000012545 processing Methods 0.000 claims description 3
- 229910000859 α-Fe Inorganic materials 0.000 claims description 2
- 230000000694 effects Effects 0.000 claims 1
- 230000003534 oscillatory effect Effects 0.000 claims 1
- 230000015654 memory Effects 0.000 description 8
- 239000000853 adhesive Substances 0.000 description 7
- 230000001070 adhesive effect Effects 0.000 description 7
- 238000005259 measurement Methods 0.000 description 7
- 230000035945 sensitivity Effects 0.000 description 7
- 238000010586 diagram Methods 0.000 description 3
- 238000012886 linear function Methods 0.000 description 2
- 238000004519 manufacturing process Methods 0.000 description 2
- 239000002390 adhesive tape Substances 0.000 description 1
- 239000004020 conductor Substances 0.000 description 1
- 230000006735 deficit Effects 0.000 description 1
- 230000001419 dependent effect Effects 0.000 description 1
- 238000000034 method Methods 0.000 description 1
- 230000010355 oscillation Effects 0.000 description 1
- 238000012546 transfer Methods 0.000 description 1
- 238000004804 winding Methods 0.000 description 1
Classifications
-
- G—PHYSICS
- G01—MEASURING; TESTING
- G01B—MEASURING LENGTH, THICKNESS OR SIMILAR LINEAR DIMENSIONS; MEASURING ANGLES; MEASURING AREAS; MEASURING IRREGULARITIES OF SURFACES OR CONTOURS
- G01B7/00—Measuring arrangements characterised by the use of electric or magnetic techniques
- G01B7/02—Measuring arrangements characterised by the use of electric or magnetic techniques for measuring length, width or thickness
- G01B7/06—Measuring arrangements characterised by the use of electric or magnetic techniques for measuring length, width or thickness for measuring thickness
- G01B7/10—Measuring arrangements characterised by the use of electric or magnetic techniques for measuring length, width or thickness for measuring thickness using magnetic means, e.g. by measuring change of reluctance
- G01B7/107—Measuring arrangements characterised by the use of electric or magnetic techniques for measuring length, width or thickness for measuring thickness using magnetic means, e.g. by measuring change of reluctance for measuring objects while moving
-
- 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
Definitions
- the invention is based on a device for determining a thickness or thickness variation of a flat object, in particular a banknote, in which the flat object is transported by means of first and second guide elements.
- Such devices are used in the processing of flat objects. These include, for example, reading, detecting, controlling, verifying, checking, counting, (sorting), transporting and / or stacking flat objects.
- the flat objects include in particular bank notes or documents such as banknotes, checks, shares,
- Devices for detecting the thickness or thickness variation serve to detect flat objects with adhesive strips, multiple feeds or counterfeit articles. Due to the recognition of adhesive strips on flat objects, the devices are also referred to as tape sensors. Flat objects with adhesive tape are often after
- Fake objects can only be identified with the device if they differ in their thickness from the real objects.
- the device must be high in thickness
- BEST ⁇ TIGUNGSKOPtE can.
- the width of the article is measured perpendicular to the transport direction of the guide elements.
- Such a device is known for example from WO 2006119926 A1.
- the second guide elements are opposite to a first
- the second guide elements are rigidly connected to electrically conductive elements.
- Each second guide element is further associated with a stationarily arranged flat coil, to which an alternating voltage is applied. Since each of the electrically conductive elements is in the influence of the alternating magnetic field of the associated flat coil, are in a relative movement between the conductive element and
- the cover corresponds to the partial surface of the flat coil surface, which is opposite to the conductive element. Furthermore, the influence depends on the distance between a flat coil and a conductive element. The influence of the electrically conductive elements on the alternating magnetic field of the flat coils is detected by means of an evaluation device.
- the invention has for its object to provide a device for detecting
- Each second guide element is associated with at least one stationarily arranged coil.
- Each second guide element is also rigidly connected to a spool core, which in turn is movable relative to the spools.
- the turns of the coils surround a cavity in which the coil core is movable.
- the stationary coils and the movable coil cores work according to the plunger principle.
- any flat objects in particular banknotes such as banknotes, checks and papers
- a flat article with an adhesive strip at least in sections, has a greater thickness than a corresponding article without adhesive strip. If several flat objects are drawn in at the same time, the thickness of this stack is greater than the thickness of a single object. If the item is one
- the device has a plurality of second guide elements, which can be deflected independently.
- the thickness can therefore be determined over the entire width of a flat object.
- the coils and coil cores associated with the second guide elements do not influence one another, so that the determination of the thickness is not disturbed or falsified by the superposition of magnetic fields.
- the second guide elements are arranged on a line which runs perpendicular to the transport direction of the flat objects.
- the guide elements are preferably transport rollers.
- first guide element which extends over the entire width of the juxtaposed second guide elements, or it can be arranged side by side and a plurality of first guide elements together with each form a second guide element a pair.
- the row of pairs preferably runs transversely to the conveying direction of the flat objects.
- a plurality of first guide elements may be provided, wherein in each case two or more second guide elements are associated with a first guide element.
- the device has inexpensive components and is therefore simple and inexpensive to manufacture. Additional or special sensors can be dispensed with.
- the coils are arranged on a printed circuit board.
- the turns of the coils formed as strip conductors are printed on a printed circuit board. These are flat coils.
- all the coils of the device can be located on one or more printed circuit boards.
- Each coil can also consist of several
- Part coils exist. These can be located on the front and / or the back of the PCB.
- each second guide element associated with two coils.
- one of the two coils is located on the second guide elements facing side of the circuit board and the other coil on the side facing away from the second guide elements of the circuit board.
- An inductance change can be detected with high sensitivity, in particular, when the coil core with its end facing away from the second guide elements is located between the two coils.
- the circuit board has openings for the coil cores in the region of the coils.
- An opening forms the cavity surrounded by the turns of a coil, in which the coil core is movable.
- the openings are larger in cross section than the cross section of a coil core.
- the spool core is in this
- the coil cores have an elongated shape.
- the coil cores are preferably aligned with their longitudinal axis perpendicular to the circuit board. They are arranged with their end facing away from the second guide elements in a non-deflected starting position in or at the opening of the circuit board. This starting position corresponds to a measuring range with high sensitivity.
- the coil cores made of ferrite.
- the second guide elements and the coil cores are arranged on transmission elements. These provide a rigid connection between the second guide elements and the coil cores.
- the transmission elements are also movably mounted.
- Each second guide element is associated with a transmission element which can be deflected independently of the transmission elements adjacent second guide elements.
- Rotationally arranged transmission elements A deflection of a second guide element thus leads to a rotational movement of the associated transmission element.
- a deflection of a second guide element thus leads to a rotational movement of the associated transmission element.
- Transfer means arranged coil core approximately linear.
- the coils associated with a second guide element together with a capacitor each form an LC resonant circuit.
- the LC resonant circuits are preferably equipped with a device for applying a voltage.
- Each LC resonant circuit oscillates at a natural frequency, which depends on the inductance of the coil and the capacitance of the capacitor. Changes due to a change in position of the coil core, the inductance of the coil, this leads to a change in the natural frequency.
- a voltage DC voltage is preferably applied, which is sufficient to cause the LC resonant circuit to vibrate freely with its natural frequency.
- the dependence of the frequency of an LC resonant circuit on the thickness of a flat object is at least approximately linear in one area. In this range, the measurement is preferably performed. It enables the measurement of the thickness with particularly high sensitivity.
- the device is provided with evaluation electronics for determining the frequency of the LC
- Equipped oscillating circuits Either a separate transmitter is provided for each LC resonant circuit or there is an evaluation for all LC resonant circuits.
- the evaluation electronics have a measuring channel for each LC oscillating circuit assigned to a second guide element.
- the transmitter is part of the evaluation device.
- each LC resonant circuit is assigned a counter.
- the counters count the output signals of the evaluation electronics for each LC resonant circuit in a predetermined time interval. This number is transferred to a memory. After this
- adjacent coils on the circuit board on a predetermined ratio of their natural frequencies without spool core. It depends on this ratio how strongly the neighboring coils influence each other. At a certain, also dependent on the distance of the adjacent coils frequency ratio, the mutual influence is negligible. This is advantageous because the position of the coil cores has a certain inaccuracy due to the mechanical structure.
- Figure 1 side view of an apparatus for detecting a thickness
- Figure 2 is a circuit diagram of an LC resonant circuit of the device according to Figure 1,
- FIG. 3 the position of a coil core with respect to two coils and with respect to a coil in the device according to FIG. 1,
- FIG. 4 Circuit diagram of several LC resonant circuits with associated evaluation electronics of the device according to FIG. 1.
- the device shown in FIG. 1 has a first guide element 1 and a plurality of second guide elements 2. In the illustration, only one of the second guide elements 2 can be seen. The other second guide elements are covered by the recognizable in Figure 1.
- the first and the second guide elements are transport rollers.
- the transport roller of the first guide element 1 is longer than the individual transport rollers of the second guide elements 2. The sum of the length of all second guide elements and the distances between each two adjacent
- Guide elements corresponds to the length of the first guide element 1.
- the first guide element 1 and the second guide elements 2 are rotatably mounted about different axes.
- the direction of rotation 3 and 4 of the guide elements is marked in Figure 1 with arrows.
- the first guide element 1 is characterized by a not shown in the drawing
- Each of the second guide elements 2 is coupled to a transmission element 7, which is arranged rotatably about a rotation axis 8. Furthermore, a coil core 9 is rigidly connected to the transmission element 7. This spool core 9 is elongated in the form of a rod.
- the second guide member 2 opposite end is slidably guided in two coils 10 and 11.
- the two coils are printed on a printed circuit board 12.
- Both coils 10 and 11 are flat coils.
- the coil 10 is located on the second guide element 2 facing side of the circuit board 12 and the coil 11 on the side facing away from the second guide member of the circuit board 12.
- the circuit board has an opening 13 for the coil core.
- the windings of the two coils 10 and 11 surround this opening.
- the cross section of the opening 13 is larger than the cross section of the spool core.
- the printed circuit board 12 and the plane in which the two flat coils 10 and 11 are located run parallel to the transport direction 6 of the flat object.
- the circuit board 12 with the coils 10 and 11 is arranged stationary.
- All second guide elements 2 are each assigned a transmission element 7 with an axis of rotation 8 and a coil core 9 in the manner described above. All three parts are rigidly connected. For each second guide element with the transmission element and the coil core, one or two coils surrounding an opening are provided on the stationary printed circuit board 12.
- the second guide elements 2 are deflected upwards relative to the first guide element 1.
- the second guide elements 2 are additionally deflected as the thickness of the flat article changes.
- Such thickness variation may be caused by a piece of tape attached to the flat article or by a stack of at least two flat articles. Of the Adhesive strips and the stack are not shown in the drawing. Since one does not extend over the entire width of the flat article 5, not all, but only part of the second guide elements 2 are additionally deflected by the adhesive strip.
- the deflections of the second guide elements 2 lead to a rotation of the transmission elements 7 about its axis of rotation 8. This in turn leads to a deflection of the coil cores 9 upwards.
- the second guide elements facing away from the end of the coil cores is pushed further up into the opening 13 of the circuit board 12 and thereby changes its position relative to the two coils 10 and 11. This changes the inductance of the two coils.
- FIG. 2 shows a circuit diagram in which the two coils 10 and 11 are symbolized by a coil 14.
- the inductance of the coil 14 corresponds to the sum of the inductances of the coils 10 and 11.
- the coil 14 is coupled to a capacitor 15. This is an oscillator circuit, which is based on the
- Printed circuit board 12 is arranged.
- the consisting of the coil 14 and the capacitor 15 LC resonant circuit oscillates at its natural frequency, which depends on the inductance of the coil 14 and the capacitance of the capacitor 15. Changes the inductance of the coil 14 due to a change in position of the bobbin 9 in the coils 10 and 11, this leads to a change in frequency of the LC resonant circuit.
- the LC resonant circuit is excited to a vibration with its natural frequency. For this purpose, a DC voltage is applied to the LC resonant circuit.
- an evaluation electronics 16 is coupled to the LC resonant circuit, which converts the oscillation of the LC resonant circuit into a rectangular signal with the same frequency.
- FIG. 4 shows the LC resonant circuits of a plurality of second guide elements 2.
- the illustration contains the first, the second and the thirteenth LC resonant circuit.
- the resonant circuits three to twelve are indicated by dots.
- the LC resonant circuit of all second guide elements 2 are constructed as shown in FIG.
- the rectangular signal of the transmitter 16 is output to a counter 17. This counts within one given time, the pulses of the square wave signal and passes this number to a memory 18 on. This number is output by all memories 18 to a control and read-out logic 19, which converts the different numbers into thicknesses and thickness changes and outputs them via an interface.
- Evaluation electronics, counters, memory and control and read-out logic together form the evaluation device which determines the influence of the position of the coil cores relative to the coils, from which the thickness of a flat object is determined and output via its width measured perpendicular to the transport direction 6.
- FIG. 3 shows a coil core 9 with coils 10 and 11. In the left half of the picture two coils 10 and 11 are shown. The two coils are arranged on a printed circuit board 12 as shown in FIG. The circuit board is not shown in Figure 3 for simplicity. The second guide element facing away from the end of the coil core is located between the two coils
- Resonant circuit also approximately a linear function of thickness or thickness change.
- Stopping and starting the counter will take little time of less than 1 ⁇ s so that there are practically 1000 measurement results per second and per channel.
- Each of a combination of evaluation electronics, a counter and a memory associated with a second guide element corresponds to a channel.
- the coils of a plurality of second guide elements are arranged close to one another, a mutual influencing of the LC resonant circuits via the magnetic alternating fields is basically possible. If the frequencies of adjacent LC resonant circuits on the printed circuit board are harmonious, superpositions of the magnetic fields result, which lead to a large jitter.
- Optimal is a frequency ratio of about 1, 09 between adjacent LC resonant circuits, because this ratio a large frequency tolerance of about ⁇ 2% to ⁇ 3% can be allowed. This tolerance is required because the position of the coil cores has a certain inaccuracy due to the tolerances of the mechanical structure.
Landscapes
- Physics & Mathematics (AREA)
- General Physics & Mathematics (AREA)
- Measurement Of Length, Angles, Or The Like Using Electric Or Magnetic Means (AREA)
- Controlling Sheets Or Webs (AREA)
Abstract
Description
Claims
Applications Claiming Priority (2)
Application Number | Priority Date | Filing Date | Title |
---|---|---|---|
DE102009004688A DE102009004688A1 (de) | 2009-01-12 | 2009-01-12 | Vorrichtung zum Feststellen einer Dicke oder Dickenvariation eines flachen Gegenstandes |
PCT/EP2009/008833 WO2010078908A1 (de) | 2009-01-12 | 2009-12-10 | Vorrichtung zum feststellen einer dicke oder dickenvaration eines flachen gegenstandes |
Publications (1)
Publication Number | Publication Date |
---|---|
EP2376865A1 true EP2376865A1 (de) | 2011-10-19 |
Family
ID=42027662
Family Applications (1)
Application Number | Title | Priority Date | Filing Date |
---|---|---|---|
EP09804250A Ceased EP2376865A1 (de) | 2009-01-12 | 2009-12-10 | Vorrichtung zum feststellen einer dicke oder dickenvaration eines flachen gegenstandes |
Country Status (4)
Country | Link |
---|---|
US (1) | US8610441B2 (de) |
EP (1) | EP2376865A1 (de) |
DE (1) | DE102009004688A1 (de) |
WO (1) | WO2010078908A1 (de) |
Families Citing this family (7)
Publication number | Priority date | Publication date | Assignee | Title |
---|---|---|---|---|
DE102009048002A1 (de) | 2009-10-02 | 2011-04-07 | Beb Industrie-Elektronik Ag | Verfahren und Vorrichtung zur Überprüfung des Verschmutzungsgrades von Banknoten |
CN103136841B (zh) * | 2013-01-23 | 2016-12-28 | 广州广电运通金融电子股份有限公司 | 便于清除卡堵的厚度检测装置 |
JP6293036B2 (ja) | 2014-09-11 | 2018-03-14 | メソッド・エレクトロニクス・マルタ・リミテッド | 磁気センサのための距離測定方法及びセンサ |
EP3287992B1 (de) * | 2015-04-23 | 2019-06-12 | Fujitsu Frontech Limited | Sensor zur erfassung der dicke von papierblättern und banknotenunterscheidungseinheit |
JP6354683B2 (ja) * | 2015-07-03 | 2018-07-11 | 株式会社村田製作所 | コイル部品 |
WO2017185527A1 (zh) * | 2016-04-27 | 2017-11-02 | 深圳市欣驰科技有限公司 | 自动厚度检测装置及具有自动厚度检测功能的过塑机和碎纸机 |
US10502541B2 (en) | 2016-12-16 | 2019-12-10 | Climax Machine Industry Co., Ltd. | Device for detecting thickness and thickness variation of a sheetlike object |
Family Cites Families (26)
Publication number | Priority date | Publication date | Assignee | Title |
---|---|---|---|---|
CH475600A (de) * | 1967-06-15 | 1969-07-15 | Sodeco Compteurs De Geneve | Vorrichtung zur automatischen Echtheitsprüfung von wenigstens teilweise im Stahlstich- oder Kupferstichdruck hergestellten Dokumenten, insbesondere Banknoten |
US4271699A (en) * | 1979-12-07 | 1981-06-09 | Williamson Harry L | Sheet thickness monitoring system and method |
EP0080309A3 (de) | 1981-11-16 | 1984-02-29 | De La Rue Systems Limited | Apparat zum Analysieren von Blättern |
GB2170908A (en) | 1985-01-17 | 1986-08-13 | Alan Walter Sills | Sheet material thickness measuring equipment |
JPS61138079U (de) * | 1985-02-18 | 1986-08-27 | ||
CH671754A5 (de) | 1986-09-24 | 1989-09-29 | Grapha Holding Ag | |
GB8812893D0 (en) | 1988-05-31 | 1988-07-06 | De La Rue Syst | Apparatus for sensing sheets |
US5226239A (en) | 1989-04-17 | 1993-07-13 | Measurex Corporation | Aerodynamic caliper gauge |
IE914335A1 (en) | 1990-12-21 | 1992-07-01 | Measurex Corp | A sensor, system and method for determining z-directional¹properties of a sheet |
JPH0585643A (ja) * | 1991-06-03 | 1993-04-06 | Fujitsu Ltd | 紙葉類厚さ検出機構及びそれを用いた紙葉類厚さ検出方法 |
GB9127112D0 (en) | 1991-12-20 | 1992-02-19 | Schlumberger Ind Ltd | Smart displacement sensor |
GB9217568D0 (en) | 1992-08-19 | 1992-09-30 | The Technology Partnership Ltd | Device and method for detecting residual content of emptied envelopes |
DE19841432C1 (de) * | 1998-09-10 | 2000-04-20 | Siemens Nixdorf Inf Syst | Vorrichtung zum Überprüfen der Dicke von Blattmaterial mit Messung im Transportspalt |
US6360447B1 (en) | 1999-04-23 | 2002-03-26 | Agissar Corporation | Empty envelope assurance apparatus and method |
WO2001036904A1 (fr) | 1999-11-18 | 2001-05-25 | Fujitsu Limited | Pachymetre |
US20050060059A1 (en) | 2003-09-15 | 2005-03-17 | Klein Robert J. | System and method for processing batches of documents |
JP3753916B2 (ja) | 2000-03-16 | 2006-03-08 | 日立オムロンターミナルソリューションズ株式会社 | 紙葉類計数装置 |
GB2366371A (en) | 2000-09-04 | 2002-03-06 | Mars Inc | Sensing documents such as currency items |
JP2002197506A (ja) | 2000-12-26 | 2002-07-12 | Glory Ltd | Uv・蛍光検出装置及びそのセンシング方法 |
GB0106816D0 (en) | 2001-03-19 | 2001-05-09 | Rue De Int Ltd | Sheet handling apparatus and method |
US6711828B2 (en) | 2001-12-05 | 2004-03-30 | First Data Corporation | Warpage measurement system and methods |
JP3693993B2 (ja) | 2002-01-28 | 2005-09-14 | 日立オムロンターミナルソリューションズ株式会社 | 紙葉類確定装置 |
GB2404013B (en) | 2003-07-17 | 2006-05-31 | Isis Innovation | Apparatus for and method of measuring fluorescence lifetime |
US7131211B2 (en) | 2003-08-18 | 2006-11-07 | Micron Technology, Inc. | Method and apparatus for measurement of thickness and warpage of substrates |
JP4698993B2 (ja) | 2004-09-15 | 2011-06-08 | 日立オムロンターミナルソリューションズ株式会社 | 厚み検知装置 |
EP1720135A1 (de) * | 2005-05-06 | 2006-11-08 | BEB Industrie-Elektronik AG | Einrichtung zum Feststellen von Dicken und Dickenvariationen |
-
2009
- 2009-01-12 DE DE102009004688A patent/DE102009004688A1/de active Pending
- 2009-12-10 EP EP09804250A patent/EP2376865A1/de not_active Ceased
- 2009-12-10 WO PCT/EP2009/008833 patent/WO2010078908A1/de active Application Filing
- 2009-12-10 US US13/144,063 patent/US8610441B2/en active Active
Non-Patent Citations (1)
Title |
---|
See references of WO2010078908A1 * |
Also Published As
Publication number | Publication date |
---|---|
WO2010078908A1 (de) | 2010-07-15 |
DE102009004688A1 (de) | 2010-07-22 |
US8610441B2 (en) | 2013-12-17 |
US20110273191A1 (en) | 2011-11-10 |
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