CN100527174C - Sheet identifying sensor drive circuit and sheet identifying device - Google Patents
Sheet identifying sensor drive circuit and sheet identifying device Download PDFInfo
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- CN100527174C CN100527174C CNB2004800370380A CN200480037038A CN100527174C CN 100527174 C CN100527174 C CN 100527174C CN B2004800370380 A CNB2004800370380 A CN B2004800370380A CN 200480037038 A CN200480037038 A CN 200480037038A CN 100527174 C CN100527174 C CN 100527174C
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- scraps
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- switching
- paper class
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- 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
- G07D7/04—Testing magnetic properties of the materials thereof, e.g. by detection of magnetic imprint
Abstract
A drive circuit for sheet identifying sensors such that even if a plurality of magnetic sensors are provided, mutual magnetic interference between the magnetic sensors is prevented. A sensor drive circuit (1) has two or more sheet identification sensors (magnetic heads (S1 to S8)) arranged adjacently in the direction of feed of a sheet and in a direction generally perpendicular to the feed direction. The sensor drive circuit (1) is characterized by further having, for the respective sheet identification sensors, sensor drive means (transistors (Tr1 to Tr4)) for supplying ac signal from a power supply circuit (2) as an exciting signal to the sheet identification sensors, sensor switching means (switching transistors (SWTr1 to SWTr4)) for switching on/off the sheet identification sensors and by still further having switching control means (switching timing control section (11)) for supplying to the sensor switching means a control signal for controlling the supply timing of the ac signal supplied from the power supply circuit to the sheet identification sensors.
Description
Technical field
The present invention relates to discern the driving circuit of driving usefulness of the sensor of scraps of paper class, particularly relate to and reduce the device of interfering mutually under the situation that a plurality of described sensors of configuration drive simultaneously.
Background technology
Just had in the past and utilized Magnetic Sensor to detect to have or not in the scraps of paper classes such as bank note, check the magnetic China ink liquid of imbedding (the printer's ink liquid that comprises magnetisable material), the amount of imbedding black liquid, pattern etc., the paper money recognition Magnetic Sensor that the true and false and kind of this scraps of paper class is discerned.And, various schemes (reference example such as patent documentation 1,2,3) have been proposed in order to seek to improve the accuracy of identification of this paper money recognition Magnetic Sensor.
Disclosed invention in the patent documentation 1, setting is called two magnetic heads of differential-type magnetic head and residual magnetic detection type magnetic head, obtain the ratio of peakflux density with the relict flux density of magnetic China ink liquid, this ratio and setting value are compared, thereby can discern the kind of the magnetic China ink liquid of scraps of paper class reliably.
Disclosed invention in the patent documentation 2 is provided with a plurality of magnetic heads public amplifying circuit simultaneously, simplifies circuit structure with this when improving recognition performance, seeks the homogenising of quality.
Patent documentation 3 disclosed inventions, at least use two Magnetic Sensors that are used for reading the magnetic information that writes down on the scraps of paper shape medium, utilization is connected in the interaction of reading signal amplification circuit on each Magnetic Sensor, can when the pseudo-magnetic information of input, not respond yet, only real magnetic information is made reliable judgement.
Like this, aforesaid prior art by a plurality of magnetic heads are set, seeks to improve the accuracy of identification of paper money recognition with Magnetic Sensor.From carrying out the viewpoint that paper money recognition is handled at a high speed, a plurality of magnetic heads are set preferably again.
Patent documentation 1: special fair 4-No. 52518 communiques of Japan
Patent documentation 2: 58-No. 24984 communiques of Japanese kokai publication sho
Patent documentation 3: 59-No. 75386 communiques of Japanese kokai publication sho
Yet, as mentioned above, being provided with from the viewpoint that improves accuracy of identification or high speed processing under the situation that a plurality of Magnetic Sensors (magnetic head) drive, magnetic takes place between each Magnetic Sensor interfere mutually, the result might cause accuracy of identification to descend.
Again, in order further to improve the resolution of scraps of paper class identification, be necessary to be provided with many Magnetic Sensors, still, because its result causes the interval between the adjacent Magnetic Sensor to become narrow, so this has strengthened mutual interference recited above.
The present invention makes in view of such existing problems, even its purpose is to provide a plurality of Magnetic Sensors is set, and also can suppress the driving circuit of the scraps of paper class identification sensor of the generation that the magnetic between each Magnetic Sensor interferes mutually.
Summary of the invention
In order to solve aforesaid existing problems, feature of the present invention is in having the sensor drive driving circuit more than or equal to two scraps of paper tear identification sensor of disposed adjacent, for each scraps of paper class identification sensor AC signal that power circuit is come offers scraps of paper class identification sensor as excitation signal sensor drive parts are set, and carry out the conducting of scraps of paper class identification sensor-by the sensor switching part that switches, and the control signal of the service time of the AC signal that power circuit that control is provided to scraps of paper class identification sensor is set, send to the switching controls parts of sensor switching part.
More particularly, the invention provides sensor drive driving circuit as described below.
(1) a kind of sensor drive driving circuit, have in order to be printed on that the lip-deep magnetisable material of scraps of paper class detects as electromagnetic signal and with the direction of transfer of this scraps of paper class in fact on the direction of quadrature disposed adjacent more than or equal to two scraps of paper class identification sensor, wherein, each of described scraps of paper class identification sensor more than or equal to two possesses the sensor drive parts that the AC signal from power circuit offered scraps of paper class identification sensor, and the sensor switching part that carries out the switching of described scraps of paper class identification sensor, possess providing constantly of AC signal that power circuit that control offers described scraps of paper class identification sensor comes simultaneously, the switching controls parts that its control signal is sent to described sensor switching part.
Adopt the present invention, then have in order to be printed on check, the lip-deep magnetisable materials of scraps of paper class such as bank note detect as electromagnetic signal (electric signal or magnetic signal) and on about orthogonal directions of the direction of transfer of this scraps of paper class the sensor drive driving circuit more than or equal to a plurality of scraps of paper class identification sensors of two of disposed adjacent, also possess for each scraps of paper class identification sensor: the AC signal (high-frequency signal) that power circuits such as ac power supply apparatus is next offers the sensor drive parts of scraps of paper class identification sensor, and with electric, electronics, or mechanical system is carried out the sensor switching part of the switching of scraps of paper class identification sensor, and the supply that possesses the AC signal that power circuit that subtend scraps of paper class identification sensor provides comes constantly (comprising supply model) control, its control signal is sent to the sensor switching part, the switching controls parts that electric signal or light signal etc. is sent out, therefore by means of the existence of this switching controls, the moment (supply model) that can offer scraps of paper class identification sensor to the AC signal that power circuit is come is controlled.
For example, the switching controls parts can be controlled and make adjacent not conducting of scraps of paper class identification sensor, or control makes two the scraps of paper class identification sensor conducting of being separated by, thereby can suppress the mutual interference between the adjacent Magnetic Sensor, can prevent the decline of accuracy of identification.To offer again scraps of paper class identification sensor from the supply of the AC signal of power circuit in addition medelling storage in advance then constantly, when utilizing the switching controls parts to control according to this memory contents, preestablish the supply model of interference does not mutually take place between the Magnetic Sensor, can prevent the decline of accuracy of identification with this.
Again,, can reduce the circuit production cost, and can reduce circuit size, make the device for identifying sheet integral miniaturization, and can reduce consumed power owing to provide the power circuit of AC signal just enough with one to a plurality of scraps of paper class identification sensors.
Here, so-called " detecting " as electromagnetic signal be utilize with scraps of paper class surface on the interaction (for example impedance variation) of the magnetisable material that prints, detect magnetic signal and utilize electromagnetic induction etc. that it is transformed to after the electric signal, output detects as sensor with this electric signal.
Again, as " scraps of paper class identification sensor ", can consider to constitute the coil that utilizes the AC signal excitation that power circuit provides and the separated exciting sensor of the coil that detects as electric signal and be provided with and catch the resistance that inductance changes usefulness with coil independently, the coil that utilizes the coil of the AC signal excitation that power circuit provides and detect as electromagnetic signal the invention is not restricted to wherein arbitrary mode with this dual mode of sensor of the auto-excitation type of same coil formation.Also have,, can bring into play excitation function and measuring ability by enough coils, thereby can make contributions the stricturization of configuration space and the reduction of the overall cost of device for identifying sheet by adopting the auto-excitation type sensor.
As " sensor drive parts ", can adopt transistor with electric current enlarging function again.By means of this, can reduce the next AC signal of power circuit, thereby can seek to save electric power to the input of sensor drive parts.
Again, as " sensor switching part ", being not only according to electrical input signal utilizes the action of semiconductor element electronic component to make the contactless type switching part of electric signal (electric current) switching, also can consider according to electrical input signal to the mechanicalness contact carry out switch make signal (electric current) switching contact type switching part is arranged, with contactless type and the various switching parts such as mixed type switching part that have the contact type to be made up, the invention is not restricted to any one in these parts.Also have, utilize the action of semiconductor element to make under the situation of contactless type switching part of electronic signal switching, at needs many scraps of paper classes are once discerned to handle and wait when needing high speed processing, can access good switch (response) characteristic in employing.
Also have, " switching controls parts " are the parts that the supply control signal constantly that as mentioned above control offered the AC signal that the power circuit of scraps of paper class identification sensor comes sends to the sensor switching part, more particularly, be the parts that electrical input signal offered the sensor switching part.But the present invention is defined in the parts that electrical input signal is provided with the switching controls parts, adopts under the situation of optoelectronic switch at for example sensor switching part, provides the parts of light signal.
(2) the sensor driving circuit, wherein, described switching controls parts make described more than or equal to the magnetic interference does not take place between two the scraps of paper class identification sensor not sending control signal to described sensor switching part.
Adopt the present invention, then above-mentioned switching controls parts adopt control signal are sent to the sensor switching part, so that more than or equal between two the scraps of paper class identification sensor parts that magnetic is interfered mutually not taking place, therefore can prevent to interfere mutually the situation generation of the decline that causes accuracy of identification owing to the magnetic between the scraps of paper class identification sensor.
(3) a kind of device for identifying sheet possesses according to the detected electromagnetic signal of (1) or (2) described sensor drive driving circuit, the identification circuit of identification scraps of paper class.
Adopt the present invention, then device for identifying sheet is owing to the identification circuit that possesses according to scraps of paper classes such as the detected electromagnetic signal identification of the sensor driving circuit bank note, can suppress the generation of the mutual interference between a plurality of scraps of paper class identification sensors (Magnetic Sensor), therefore can prevent the decline of accuracy of identification.
Also have, not only on the whole sensor driving circuit, connect an identification circuit, also can on a scraps of paper class identification sensor, connect an identification circuit, just connect the identification circuit of scraps of paper class identification sensor number.By means of this, can have to scraps of paper class be discerned to the signal of selected scraps of paper class identification sensor, therefore can suppress the mutual interference between a plurality of scraps of paper class identification sensors, can carry out scraps of paper class identification reliably simultaneously.
As mentioned above, the supply control signal constantly that position detecting device of the present invention will be provided by the AC signal that is provided to scraps of paper class identification sensor by the sensor drive parts sends to the sensor switching part of the switching of carrying out scraps of paper class identification sensor, even therefore be provided with under the situation of a plurality of scraps of paper class identification sensors, also can be by avoiding driving for example adjacent scraps of paper class identification sensor simultaneously, suppress the generation that the magnetic between the sensor is interfered mutually, thereby can prevent the precise decreasing of device for identifying sheet.Again,, therefore can reduce the circuit production cost, the miniaturization of circuit size, the minimizing of power consumption are made contributions owing to provide the power circuit of AC signal just enough to a plurality of scraps of paper class identification sensors with one.
Description of drawings
Fig. 1 is the circuit diagram of the circuit structure of the driving circuit of scraps of paper class identification sensor of expression example of the present invention and peripheral circuit thereof.
Fig. 2 is that expression utilizes the device for identifying sheet of the driving circuit be assembled with example of the present invention to discern the planimetric map of situation of 1,000 yen bank note.
Fig. 3 is the circuit diagram of the circuit structure of the driving circuit of scraps of paper class identification sensor of expression the present invention another example and peripheral circuit thereof.
Fig. 4 is the different key diagram that is used to illustrate separated exciting magnetic head and auto-excitation type magnetic head.
Fig. 5 is the key diagram of embodiments of the invention.
Label declaration
1 driving circuit
2 power circuits
3 sensor signal processing circuits
11 switching instant control parts
S
1～S
4The separated exciting magnetic head
S
5～S
8The auto-excitation type magnetic head
Tr
1～Tr
4Transistor
SWTr
1～SWTr
4Switching transistor
R
1～R
4Base resistance
R
5～R
8Sensor resistance
Embodiment
Below, with reference to accompanying drawing best example of the present invention is described.
(circuit structure)
Fig. 1 is the circuit diagram of the circuit structure of the driving circuit 1 of scraps of paper class identification sensor of expression example of the present invention and peripheral circuit thereof.
In Fig. 1, the driving circuit of scraps of paper class identification sensor possesses separated exciting magnetic head S1～S4 as an example of scraps of paper class identification sensor, as base resistance R1～R4 of transistor Tr 1～Tr4, the transistor Tr 1～Tr4 of an example of sensor drive parts, as the switching transistor SWTr1～SWTr4 of an example of sensor switching part and as the switching instant control part 11 of an example of switching controls parts.Again, on the driving side of driving circuit 1, connect AC power 2, on the detection side of driving circuit 1, connect (one or more) sensor signal processing circuit 3 as an example of identification circuit as an example of power circuit.
Also have, 4 separated exciting magnetic head S1～S4 on the vertical direction in fact of the throughput direction of scraps of paper class according to this order disposed adjacent.But, in so-called here " adjacent ", be not only 4 separated exciting magnetic head S1～S4 and be in contact with one another, and comprise situation with certain arranged spaced.Again, here, expressing at the separated exciting magnetic head is sensor drive driving circuit 1 under 4 the situation, and still, the invention is not restricted to the separated exciting magnetic head is 4, for example also can be 12 that use in the common identification sensor, can be 24 again.Again, transistor Tr 1～Tr4 and switching transistor SWTr1～SWTr4 can be any in NPN transistor or the PNP transistor.And these transistors, according to circumstances can be field effect transistors such as junction type FET or MOSFET or also can be the analog switch of generic logic IC.
In Fig. 1, the AC power 2 that is arranged on the driving side of driving circuit 1 is connected in the drive end (base terminal) of transistor Tr 1 by base resistance R1, be connected in the drive end (base terminal) of transistor Tr 2 simultaneously by base resistance R2, also be connected in the drive end (base terminal) of transistor Tr 3, be connected in the drive end (base terminal) of transistor Tr 4 by base resistance R4 by base resistance R3.
The emitter terminal of transistor Tr 3 is connected on the field coil of separated exciting magnetic head S1, and the collector terminal of transistor Tr 1 is connected on the collector terminal of switching transistor SWTr1.Again, same, the emitter terminal of transistor Tr 2 is connected on the field coil of separated exciting magnetic head S2, and the collector terminal of transistor Tr 2 is connected on the collector terminal of switching transistor SWTr2.The emitter terminal of transistor Tr 3 is connected on the field coil of separated exciting magnetic head S3, and the collector terminal of transistor Tr 3 is connected on the collector terminal of switching transistor SWTr3.The emitter terminal of transistor Tr 4 is connected on the field coil of separated exciting magnetic head S4, and the collector terminal of transistor Tr 4 is connected on the collector terminal of switching transistor SWTr4.Also have, directly connect separated exciting magnetic head S1～S4 on the emitter side of each transistor Tr 1～Tr4, still, for example also can be used as, emitter resistance connects by fixed resistance.
On the emitter terminal of switching transistor SWTr1～SWTr4, connect the power supply that is used for switching transistor SWTr1～STWr4 is provided collector current respectively, go up connection switching instant control part 11 at the drive end (base terminal) of switching transistor SWTr1～STWr4.Also have, the present invention is not limited to the described circuit arrangement of Fig. 1 with the circuit arrangement of switching transistor SWTr1～STWr4, the base terminal or the emitter terminal that for example also can be connected in transistor Tr 1～Tr4 are first-class, can change in the scope of the purpose of avoiding the magnetic interference that does not break away from the application.
, send two signal line from switching instant control part 11 here, a signal line is branched to the base terminal of switching transistor SWTr1 and STWr3, and another signal wire is branched to the base terminal of switching transistor SWTr2 and STWr4.In such circuit structure, by only control signal being sent in two signal line, can control to such an extent that the separated exciting magnetic head S1 of disposed adjacent and separated exciting magnetic head S2, separated exciting magnetic head S2 and separated exciting magnetic head S3, separated exciting magnetic head S3 and separated exciting magnetic head S4 are not driven simultaneously.That is to say, can control to such an extent that do not drive adjacent separated exciting magnetic head simultaneously.
Also have, switching instant control part 11 is the control parts that as mentioned above control signal sent to two signal line, can utilize the microprocessor that is made of cpu chip for example, high-frequency clock pulse circuit and 1 time, No. 2 caches etc. to specialize.In the present invention, no matter the kind of the specific circuit (device) of switching instant control part 11 how.Again, in this example, switching instant control part 11 is by one in two signal line output control signal, but the invention is not restricted to this, for example also can be to separated exciting magnetic head S1～S4 difference signalization line (4 signal line are set), be formed on and carry out relay control in the switching instant control part 11, so that can simultaneously two adjacent signal line not transmitted control signal.
The magnetic test coil of separated exciting magnetic head S1～S4 is connected on the sensor signal processing circuit 3 that is provided with on the detection side of driving circuit 1.Also have, sensor signal processing circuit 3 is made of half-wave rectification or full-wave rectifying circuit, low-pass filter and operational amplifier etc., the electromagnetic signal of separated exciting magnetic head output is amplified or served as according to carrying out with the relevant various signal Processing of scraps of paper class identification with this electromagnetic signal, omit its detailed description here.
(basic circuit action)
Fig. 2 is that expression utilizes the device for identifying sheet of the driving circuit 1 be assembled with example of the present invention to discern the planimetric map of situation of 1,000 yen bank note.
In Fig. 2, illustrate the driving circuit 1 that is assembled with example of the present invention unit 21, be arranged on a plurality of separated exciting magnetic heads (12) that comprise separated exciting magnetic head S1～S4 of this inside, unit, as 1,000 Japanese yen paper currencies 22 of identifying object, be embedded in the magnetic China ink liquid 23 of this 1,000 Japanese yen paper currency and with the carrying path 24 of this 1,000 Japanese yen paper currency to right-hand conveying.Again, separated exciting magnetic head S1～S4 disposed adjacent on perpendicular to the direction of the carrying path of 1,000 Japanese yen paper currencies.Also have, the separated exciting magnetic head beyond separated exciting magnetic head S1～S4 be connected in shown in the circuit diagram of Fig. 1 with on the identical driving circuit of driving circuit 1.
In Fig. 2, at first, when the bank note 22 that inserts 1,000 yen from left (Fig. 2 (a)), be arranged on transmission belt (not shown) on the transmission channel 24 with 1,000 yen bank note 22 to right-hand transmission.
Then, 1,000 yen bank note 22 be sent to unit 21 under when (nearside) (Fig. 2 (b)), separated exciting magnetic head S1～S4 detects magnetic China ink liquid 23 as electromagnetic signal.More particularly, in the circuit diagram of Fig. 1, provide the transistor Tr 1～Tr4 of AC signal collector current (alternating current) to be offered the field coil of separated exciting magnetic head S1～S4 by AC power 2.Then, in case magnetic China ink liquid 23 is come near the clearance portion of separated exciting magnetic head S1～S4, magnetic flux (magnetic signal) by this clearance portion and core changes (disorder), utilizes electromagnetic induction, and its change component is exported to the magnetic test coil of separated exciting magnetic flux S1～S4 as electric signal.
At this moment, the switching instant control part sends the control signal (drive signal) of difference driving switch transistor SWTr1 and SWTr3 and switching transistor SWTr2 and SWTr4 as mentioned above with two signal line, so the collector current (exciting current of separated exciting magnetic head S4 and S4) of the collector current of transistor Tr 1 and Tr3 (exciting current of separated exciting magnetic head S1 and S3) and transistor Tr 2 and Tr4 is subjected to conducting respectively, ends control.Thereby adjacent separated exciting magnetic head (separated exciting magnetic head S1 and S2, separated exciting magnetic head S2 and S3, separated exciting magnetic head S3 and S4) can not be driven simultaneously, can prevent that the magnetic between the adjacent separated exciting magnetic head from interfering mutually.
Also have, switching instant control part 11 carries out the switching to the control signal of two signal line at a high speed.For example if having the switching instant control part of the clock signal frequency of 1MHz, then can be with the interval switch-over control signal of about 5 microseconds.If thereby utilize such switching instant control part 11, then can go out 1,000 yen bank note 22 with high resolution detection.
＜variation 〉
(circuit structure)
Fig. 3 is the circuit diagram of the circuit structure of the driving circuit 1 of scraps of paper class identification sensor of expression the present invention another example and peripheral circuit thereof.Also have, for being marked with identical label with each the element components identical shown in the circuit diagram of Fig. 1.
In Fig. 3, the driving circuit 1 of scraps of paper class identification sensor possesses auto-excitation type magnetic head S5～S8 as an example of scraps of paper class identification sensor, catches the sensor resistance R5～R8 of the impedance variation of auto-excitation type magnetic head S5～S8, as base resistance R1～R4 of transistor Tr 1～Tr4, the transistor Tr 1～Tr4 of an example of sensor drive parts, as the switching transistor SWTr1～SWTr4 of an example of sensor switching part and as the switching instant control part 11 of an example of switching controls parts.Again, same as in figure 1, connect AC power 2 on the driving side of driving circuit 1 as an example of power circuit, connect (one or more) sensor signal processing circuit 3 on the detection side of driving circuit 1 as an example of identification circuit.
Here, the difference of the circuit diagram of Fig. 3 and the circuit diagram of Fig. 1 is that magnetic head is separated exciting or auto-excitation type.Therefore, the point for identical with the circuit diagram of Fig. 1 omits its explanation.
Fig. 4 is the key diagram of the explanation separated exciting magnetic head and the different usefulness of auto-excitation type magnetic head.Fig. 4 (a) expression separated exciting magnetic head, Fig. 4 (b) expression auto-excitation type magnetic head.For function, the action of the separated exciting magnetic head shown in Fig. 4 (a), because with top described identical, so its explanation is omitted.
In Fig. 4 (b), the coil that utilizes the AC signal excitation that power circuit provides of auto-excitation type magnetic head and the coil that detects as electromagnetic signal are with identical coil formation, one end of its coil is connected in ground wire, and the sensor resistance that the other end of its coil is used by the seizure impedance variation is connected in AC power.Obtain output from the tie point of coil and sensor resistance again.
At first, the auto-excitation type magnetic head utilizes the alternating current excitation that AC power provides.In case and magnetisable material (magnetic ink) is come near the coil below, flow through the eddy current confusion reigned of core, utilize the impedance variation (flow through the variation of the electric current of coil) of sensor resistance seizure, with this tie point output electric signal from coil and sensor resistance along with the coil of its generation.
The circuit diagram of Fig. 3 uses 4 aforesaid auto-excitation type magnetic heads and sensor resistance respectively, is printed on the lip-deep magnetisable material of scraps of paper class (magnetic ink) and goes out as electrical signal detection, and this circuit diagram with Fig. 1 is identical.
(basic circuit action)
The action of the basic circuit of circuit shown in Figure 3 is moved identical with the basic circuit of above-mentioned circuit shown in Figure 1.That is to say, provide the transistor Tr 1～Tr4 of AC signal collector current (alternating current) to be offered the field coil of auto-excitation type magnetic head S5～S8 by sensor resistance R5～R8 by AC power 2.Then, in case 1,000 yen bank note 22 (with reference to Fig. 2) is come near auto-excitation type magnetic head S5～S8 below, just export electric signal from the tie point of auto-excitation type magnetic head S5～S8 and sensor resistance R5～R8.At this moment, the switching instant control part sends the control signal that adjacent auto-excitation type magnetic head does not drive simultaneously to switching transistor SWTr1～SWTr4.By means of this, can prevent that the magnetic between the adjacent auto-excitation type magnetic head from interfering mutually.Owing to can carry out the identification of scraps of paper class,, seek to reduce the cost of device for identifying sheet integral body so can seek narrow and smallization of configuration space with a coil with excitation function and measuring ability again.
Embodiment
Fig. 5 is the key diagram of embodiments of the invention.More particularly, be owing to do not drive adjacent magnetic head simultaneously, can remove the experimental result that magnetic is interfered the influence (spike output) that causes mutually between these magnetic heads.
In Fig. 5 (a), in an embodiment of the present invention, (sensor 51 (unit 21 that is equivalent to say among Fig. 2) of ch1～ch3) vertically transmits the configuration direction of 3 magnetic heads and lettering portion 53 to have lettering portion 53 the determined medium 52 (being equivalent to bank note said 1,000 yen among Fig. 2 22) such as copy paper of (being equivalent to said magnetic China ink liquid 23 among Fig. 2) with respect to having 3 magnetic heads.Also have, the clearance between sensor 51 and the carrying path 24 is 0.That is to say, transmit while determined medium 52 slide with sensor 51.
At first, (ch1～ch3) situation of driving describes simultaneously to 3 magnetic heads.The lettering portion 53 of determined medium 52 is in case by sensor 51 belows, (in the corresponding identification circuit of ch1～ch3), obtaining the waveform shown in Fig. 5 (b) and exporting with 3 magnetic heads.In Fig. 5 (b), transverse axis is represented displacement (mm), and the longitudinal axis is represented output (V).Again, the waveform of the top represent from top the 2nd ch1 waveform, from the waveform of top the 3rd ch2 and the ch3 of below waveform be collectively referred to as waveform.
According to Fig. 5 (b), then the approximate shape of the waveform of ch1～ch3 is a spill as can be known, because the relation of the transmitting range of determined medium 52, output time has deviation.That is to say that determined medium 52 are exported the waveform of ch3 when the scope intrinsic displacement of 7mm～14mm, determined medium 52 are when 15mm～22mm scope displacement, the waveform of output ch2, determined medium 52 are exported the waveform of ch1 when the scope displacement of 23mm～30mm.Also have, in each waveform of ch1～ch3, obtain peak value near the moment and the determined medium 52 of magnetic head from moment in these two moment that magnetic head leaves at determined medium 52, this is that sensitivity is the highest because in the turning of magnetic head magnetic flux maximum.
Here, in the waveform of 3ch, keep right and spike output Tg1 occurs on the right of peak value, in the waveform of 2ch, spike output Tg2 appears on the left side near the left side peak value, keeping right spike output Tg3 occurs on the right of peak value, in the waveform of 1ch, occurs spike output Tg4 on the left side near the left side peak value.This influence rather than other reasons that is the mutual interference between each magnetic head causes causes.
Below, (situation of ch1～ch3) drive describes (Fig. 5 (c)～Fig. 5 (e)) to each magnetic head respectively.Under the situation that only drives magnetic head ch1, obtain the such output waveform of Fig. 5 (c), under the situation that only drives magnetic head ch2, obtain the such output waveform of Fig. 5 (d), under the situation that only drives magnetic head ch3, obtain the such output waveform of Fig. 5 (e).According to Fig. 5 (c)～Fig. 5 (e), under the situation of each magnetic head ch1～ch3 of individual drive, magnetic can not take place between these magnetic heads interfere the influence (spike output) that causes mutually as can be known.
At last, the situation that drives magnetic head ch1 and ch3 is simultaneously described (Fig. 5 (f)).Drive at the same time under the situation of magnetic head ch1 and magnetic head ch3, obtain the such output waveform of Fig. 5 (f).According to Fig. 5 (f), the spike output Tg1 and the Tg4 that occur in Fig. 5 (b) as can be known are removed.In more detail, the spike output Tg1 and the Tg4 that occur in Fig. 5 (b) approximately are reduced to about 1/5.
Thereby, in the embodiment shown in Fig. 5 (a), by not driving the control of adjacent magnetic head (ch1 and ch2, ch2 and ch3) simultaneously, the magnetic between each magnetic head interferes the influence (spike output) that causes to be removed mutually, thereby can prevent the decline of accuracy of identification.
Industrial practicality
The drive circuit of paper sheet identification sensor of the present invention is to utilize the paper sheet identification sensor is led to The disconnected sensor switching part that switches and control signal is sent to the switching controls of this sensor switching part Parts, the providing constantly from the AC signal of power circuit that control provides to the paper sheet identification sensor Circuit, the circuit of the generation of mutually interfering as the magnetic that can suppress between the paper sheet identification sensor is to have With.
Claims (3)
1. sensor drive driving circuit, have for the lip-deep magnetisable material that will be printed on scraps of paper class detects as electromagnetic signal with the direction of the direction of transfer quadrature of this scraps of paper class on disposed adjacent more than or equal to two scraps of paper class identification sensor, it is characterized in that
Each described scraps of paper class identification sensor possesses the sensor switching part that the AC signal from power circuit is offered the sensor drive parts of scraps of paper class identification sensor and carries out the switching of described scraps of paper class identification sensor, simultaneously
Possess the switching controls parts, providing regularly of the AC signal that the power circuit that this switching controls parts control offers described scraps of paper class identification sensor sent its control signal to described sensor switching part.
2. sensor drive driving circuit according to claim 1 is characterized in that,
Described switching controls parts are sent control signal to described sensor switching part, make described more than or equal to the magnetic interference does not take place between two the scraps of paper class identification sensor.
3. a device for identifying sheet is characterized in that possessing
The detected electromagnetic signal of sensor drive driving circuit according to claim 1 and 2, the identification circuit of identification scraps of paper class.
Applications Claiming Priority (2)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| JP417652/2003 | 2003-12-16 | ||
| JP2003417652A JP4507585B2 (en) | 2003-12-16 | 2003-12-16 | Drive circuit for paper sheet identification sensor and paper sheet identification device |
Publications (2)
| Publication Number | Publication Date |
|---|---|
| CN1894729A CN1894729A (en) | 2007-01-10 |
| CN100527174C true CN100527174C (en) | 2009-08-12 |
Family
ID=34697072
Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| CNB2004800370380A Expired - Fee Related CN100527174C (en) | 2003-12-16 | 2004-12-15 | Sheet identifying sensor drive circuit and sheet identifying device |
Country Status (3)
| Country | Link |
|---|---|
| JP (1) | JP4507585B2 (en) |
| CN (1) | CN100527174C (en) |
| WO (1) | WO2005059845A1 (en) |
Families Citing this family (6)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| JP5136009B2 (en) | 2007-11-13 | 2013-02-06 | 沖電気工業株式会社 | Detection method and detection apparatus for magnetic sensor detection signal |
| JP2010257292A (en) * | 2009-04-27 | 2010-11-11 | Hitachi Omron Terminal Solutions Corp | Medium thickness detection device |
| CN102262794A (en) * | 2011-08-10 | 2011-11-30 | 深圳市怡化电脑有限公司 | Intelligent magnetic sensor module for detection of paper money |
| CN104732650B (en) * | 2015-03-27 | 2017-06-16 | 深圳怡化电脑股份有限公司 | The processing method and system of a kind of bank note |
| CN105069894A (en) * | 2015-05-13 | 2015-11-18 | 恒银金融科技有限公司 | Hall-type detection device used for detecting thickness of paper money |
| CN111445617B (en) * | 2018-12-30 | 2021-12-14 | 沈阳中钞信达金融设备有限公司 | High-precision full-width magnetic image detection processing system |
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| CN2116250U (en) * | 1992-01-22 | 1992-09-16 | 王林根 | Money recognizer |
| US5457382A (en) * | 1990-07-17 | 1995-10-10 | Gao Gesellschaft Fur Automation Und Organisation Mbh | Apparatus for testing documents having magnetic properties |
| CN2362156Y (en) * | 1998-12-04 | 2000-02-02 | 王晓光 | Money-checking machine capable of picking out forged money |
| CN1385816A (en) * | 2001-05-16 | 2002-12-18 | 松下电器产业株式会社 | Magnetic sensor and paper note identifier using same |
| JP4052518B2 (en) * | 2004-01-30 | 2008-02-27 | 日本製紙株式会社 | Cast coated paper for inkjet recording and method for producing the same |
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| JPS5824984A (en) * | 1981-08-06 | 1983-02-15 | 国産金属工業株式会社 | Magnetic detection circuit for paper money discriminator |
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| JP4310895B2 (en) * | 2000-07-04 | 2009-08-12 | 株式会社島津製作所 | Magnetic measuring instrument |
| JP2002269615A (en) * | 2001-03-09 | 2002-09-20 | Canon Electronics Inc | Coin identification device |
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- 2004-12-15 WO PCT/JP2004/018707 patent/WO2005059845A1/en active Application Filing
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| US5457382A (en) * | 1990-07-17 | 1995-10-10 | Gao Gesellschaft Fur Automation Und Organisation Mbh | Apparatus for testing documents having magnetic properties |
| CN2100664U (en) * | 1991-07-02 | 1992-04-01 | 蔡智明 | Dual-funcitonal paper money tester |
| CN2116250U (en) * | 1992-01-22 | 1992-09-16 | 王林根 | Money recognizer |
| CN2362156Y (en) * | 1998-12-04 | 2000-02-02 | 王晓光 | Money-checking machine capable of picking out forged money |
| CN1385816A (en) * | 2001-05-16 | 2002-12-18 | 松下电器产业株式会社 | Magnetic sensor and paper note identifier using same |
| JP4052518B2 (en) * | 2004-01-30 | 2008-02-27 | 日本製紙株式会社 | Cast coated paper for inkjet recording and method for producing the same |
Also Published As
| Publication number | Publication date |
|---|---|
| JP2005182115A (en) | 2005-07-07 |
| CN1894729A (en) | 2007-01-10 |
| WO2005059845A1 (en) | 2005-06-30 |
| JP4507585B2 (en) | 2010-07-21 |
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