JPH10334300A - Method and device for checking authentication of paper money - Google Patents

Abstract

PROBLEM TO BE SOLVED: To improve the security and to prevent wear of paper money and the check device by placing a contactless magnetic sensor close to a paper note carrying path and checking the authentication of the paper money based on a signal outputted according to the carrying of the paper money. SOLUTION: A magnetic sensor 1 is placed at a right angle to a side of a paper money to be checked that is printed by magnetic ink and has a residual magnetism at a prescribed distance from the side of the paper money. The magnetic sensor scans a magnetic print of the paper money to be checked in opposition to it and gives an obtained output signal to a signal extract means 6 of a check means 2. The signal extract means 6 extracts a signal from the magnetic sensor 1 that is changed with reaction of the magnetic print section of the paper money to be checked. A reference value (upper limit and lower limit) of acceptable currency of a prescribed denomination is set to a reference value signal generating means 8. A comparison discrimination means 7 compares the signal received from the signal extract means 6 with the reference value and provides an output of a signal denoting it that the paper money to be checked is correct when the signal is within the reference value.

Description

DETAILED DESCRIPTION OF THE INVENTION

[0001]

BACKGROUND OF THE INVENTION 1. Field of the Invention The present invention relates to a method and an apparatus for inspecting the authenticity of a banknote, and more particularly to a method and an apparatus for inspecting the authenticity of a banknote to be inspected printed with magnetic ink. The present invention relates to a method and an apparatus for checking the authenticity of a banknote.

[0002]

2. Description of the Related Art In recent years, with the spread of vending machines and the like, mischief, such as deceiving a device such as a bill validator and depriving the change in the device, has been continued. In addition, crimes caused by forgery of banknotes have been increasing, and foreign banknotes have been brought in from other countries along with internationalization, and the number of cases in which such foreign banknotes are used intentionally or by mistake in vending machines and the like has been increasing.
Under such circumstances, while measures are being taken to enhance the printing of banknotes, there is a demand for improved security and high-precision inspection techniques for devices.

[0003] A method using magnetic ink is known as one of the advanced printing methods for banknotes. For example, there is a US dollar bill printed with magnetic ink. In this one-dollar bill, the strength of the remanent magnetism in the space about 1 mm away from its surface is about 10 ^-4 Oe (Oersted) to 10 ^-3 O
e (oersted). This is equivalent to 1/100 to 1/1000 of the intensity of geomagnetism.

[0004] As a method of detecting magnetic ink, a device using a magnetic head is generally used in the prior art.
As the magnetic head of the conventional device, a coil type magnetic head in which a coil is wound around a magnetic pole made of a magnetic material, or an MR element type magnetic head using a magnetoresistive (MR) element is used. Among these two magnetic heads, even the MR element type magnetic head having relatively high sensitivity has a sensitivity of about 10 ^-2 Oe (Oersted).

[0005] With a conventional magnetic head having such sensitivity, it is difficult to obtain a signal of the magnetic ink portion in a non-contact manner. Therefore, the conventional magnetic head is designed to contact the magnetic ink portion printed on the surface of the bill, and furthermore, in order to secure the contact between the bill and the magnetic head, the bill is sandwiched between the magnetic head and the roller. , And it is configured to inspect whether or not the test bill is genuine based on a signal obtained at that time.

[0006]

2. Description of the Related Art As described above, in a conventional bill validator, the sensitivity of the magnetic head is low. Therefore, in order to detect the magnetism of the magnetic ink portion on the bill surface, the magnetic head is driven by the magnetic ink. Scanning had to be performed while contacting the printing section. As a result, a streak scanned by the magnetic head portion remains on the surface of the bill, so that it is possible to determine which part of the bill is detected by the device. This is a good target for those who intentionally try to play a mischief, and there are security problems such as clues to deceiving the device.

On the other hand, as described above, since bills are conveyed while being sandwiched between the magnetic head and the rollers, there is a problem that the bills are easily jammed in the magnetic head portion of the carrying path.
Further, since the bill is transported in contact with the magnetic head portion, there is a problem that the magnetic head is mechanically worn, so that the life of the magnetic head is shortened and the life of the bill is shortened. Further, since scanning is performed by bringing the magnetic head and the roller into contact with the banknote, dust easily adheres to the magnetic head.

Therefore, the present invention improves the security and prevents the bills and the inspection apparatus from being worn, so that the authenticity of the bills to be inspected can be inspected in a non-contact manner. It is an object to provide an inspection method and apparatus.

[0009]

In order to achieve the above object, the present invention relates to a method for non-contactly inspecting the authenticity of a bill to be inspected, the method comprising the steps of: A non-contact type magnetic sensor is provided, and the authenticity of the bill is inspected based on a signal output from the magnetic sensor as the bill is transported along the transport path.

The magnetic sensor is constituted by a magnetic inductance type magnetic sensor which detects a voltage with respect to a time change of a circumferential magnetic flux caused by flowing a time-varying current through a magnetic wire as a change due to an externally applied magnetic field. The banknote may be configured to check the authenticity of the banknote based on a signal output from the magnetic inductance type magnetic sensor.

The magnetic sensor is disposed in correspondence with a position of a predetermined printing section printed on the bill surface with magnetic ink, and a signal output from the magnetic sensor is a predetermined printing section of the bill. Can be configured to inspect the authenticity of the bill based on a signal obtained by scanning the bill.

[0012] The magnetic sensor is arranged corresponding to an arrangement position of a predetermined printing unit printed with magnetic ink on at least one of the front surface and the back surface of the bill, and a signal output from the magnetic sensor is The bill may be configured to inspect the authenticity of the bill based on a signal obtained by scanning a predetermined printing portion of the bill.

The magnetic sensor includes a first magnetic sensor disposed at a position corresponding to a predetermined printing unit printed on the bill surface with magnetic ink, and a non-magnetic ink on the bill surface. A second magnetic sensor disposed corresponding to an arrangement position of a printed predetermined printing unit, and scanning a predetermined magnetic ink printing unit of the bill from the first magnetic sensor. The authenticity of the bill can be inspected based on a signal received and a signal obtained by scanning a predetermined non-magnetic ink printing portion of the bill from the second magnetic sensor.

According to the present invention, there is provided an apparatus for inspecting the authenticity of a bill to be inspected in a non-contact manner, wherein the non-contact type magnetic sensor is disposed at a predetermined position of the bill transport path in close proximity to the transport path. And an inspection unit that inspects the authenticity of the bill based on a signal output from the magnetic sensor as the bill is conveyed along the conveyance path.

The magnetic sensor has magnetic inductance type magnetic sensor means which self-oscillates at a predetermined frequency so that the magnetic wire constitutes an element of an oscillation circuit. A signal extracting means for detecting and extracting a signal which is changed by a residual magnetic field of the magnetic ink part of the bill by a magnetic sensor, and a reference value signal generating means for producing a reference value signal for a bill inspection on a true bill of a predetermined denomination And a comparison determination unit that compares a signal from the signal extraction unit obtained by scanning the bill with the magnetic sensor and a reference value signal from the reference value signal generation unit, and further includes the comparison determination unit. Generating a signal indicating that the bill is genuine when the signal from the signal extracting means matches the reference value signal within a predetermined allowable range. To so that, the reference value signal can be configured to check the genuineness of the bill as a function value obtained by testing the authenticity distribution banknotes of the denomination in the magnetic sensor.

Further, the magnetic inductance type magnetic sensor can be configured to have a magnetic shield on a surface other than the surface facing the transport path.

[0017] The magnetic sensor is disposed in correspondence with a position of a predetermined printing portion printed on the bill surface with magnetic ink, and the inspection means is configured to output the bill outputted from the magnetic sensor. The banknote may be configured to inspect the authenticity of the banknote based on a signal obtained by scanning the predetermined printing unit.

[0018] The magnetic sensor is disposed corresponding to a position of a predetermined printing portion printed on at least one of the front surface and the back surface of the bill with magnetic ink. It can be configured to check the authenticity of the banknote based on a signal obtained by scanning a predetermined printing portion of the banknote output from the banknote.

The magnetic sensor includes a first magnetic sensor disposed at a position corresponding to a predetermined printing portion printed on the bill surface with magnetic ink, and a non-magnetic ink on the bill surface. A second magnetic sensor disposed in accordance with the arrangement position of the printed predetermined printing unit, wherein the inspection unit is configured to output a first signal output from the first magnetic sensor and the second signal to the second magnetic sensor. Switching means for switching and outputting a second signal output from the magnetic sensor of the above, a signal obtained by scanning a predetermined magnetic ink printing portion of the bill from the switching means, and the second magnetic sensor , Based on at least one of signals obtained by scanning a predetermined non-magnetic ink printing portion of the bill from above, the authenticity of the bill can be inspected.

[0020]

DETAILED DESCRIPTION OF THE PREFERRED EMBODIMENTS Hereinafter, an embodiment of a method and an apparatus for non-contactly inspecting the authenticity of a bill to be inspected according to the present invention will be described.
This will be described in detail with reference to the accompanying drawings.

FIG. 1 is a block diagram showing an embodiment of a circuit for checking the authenticity of a bill to be inspected according to the present invention. This banknote authenticity inspection circuit is actually configured using a computer.

FIG. 2 shows a bill to be inspected used in this configuration example.
An example of a configuration simulating 20 is shown. In FIG. 2, a pattern, characters, and the like are printed in a print area 21 on the surface of the test bill 20, and the print area 21 has a magnetic printing unit 22 printed with magnetic ink. In the magnetic printing section 22, there is residual magnetism caused by magnetic powder in the magnetic ink. Then, the intensity of the residual magnetism of the magnetic printing unit 22 can be detected by the magnetic sensor.

Returning to FIG. 1, the magnetic sensor 1 is constituted by a magnetic inductance type magnetic sensor. The principle of this magnetic inductance type magnetic sensor is disclosed in JP-A-6-1769.
No. 30 and JP-A-6-283344. That is, the magnetic inductance type magnetic sensor detects and outputs a voltage with respect to a temporal change of the circumferential magnetic flux generated by flowing a high-frequency current through the magnetic wire as a change due to an externally applied magnetic field. The sensitivity of this magnetic inductance type magnetic sensor is very high, and a sensitivity equal to or higher than that of the FG (flux gate) type magnetic sensor can be obtained.

Then, the detection signal of the magnetic sensor 1 is given to the inspection means 2. The inspection unit 2 includes a signal extraction unit 6, a comparison determination unit 7, and a reference value signal generation unit 8, and forms an output signal corresponding to a detection signal of the magnetic sensor 1.

The magnetic inductance type magnetic sensor 1
Can use a change in impedance with respect to an externally applied magnetic field. The magnetic inductance type magnetic sensor having such a feature is considered to be used as a highly sensitive magnetic sensor operating at room temperature, such as a weak magnetic field measurement.

FIG. 3 shows an example of the configuration of a magnetic inductance type magnetic sensor. In FIG. 3, the magnetic wire 3 constitutes a magnetic inductance element, and a thin wire of amorphous or the like having a high magnetic permeability is used. The magnetic wire 3 is joined to the terminals 31-1 and 31-2 provided at both ends of the printed circuit board 30 so as to be electrically conductive, and the lead wires 32-1 and 32-2
Connected to.

FIG. 4 shows a circuit for explaining the principle for obtaining an amplitude signal from the signal output from the magnetic sensor 1. In FIG. 4, the lead wires 32-1 and 32-2 connected to the magnetic wire 3 are connected to the oscillation circuit 5 via the current limiting resistor 4 to form the magnetic sensor 1.

FIG. 5A shows the waveform of a high-frequency current flowing through the magnetic wire 3 of the magnetic sensor 1. The frequency of this high-frequency current is several MHz to several tens of MHz. However, it is not limited thereto. This magnetic wire 3
By passing a time-varying high-frequency current to generate a skin effect, the inductance or impedance of the magnetic inductance element is changed by an external magnetic field. As described above, the magnetic sensor 1 can obtain an output signal proportional to the strength of the external magnetic field from the output signal by utilizing the fact that the inductance is changed by the external magnetic field.

The signal output from the magnetic sensor 1 is
The waveform of the high-frequency current is a signal waveform modulated by the waveform that the magnetic sensor 1 changes according to the strength of the external magnetic field. As shown in FIG. 1, from the signal waveform, the magnetic sensor
1 is provided with a signal extracting means 6 for extracting only a signal that changes according to the strength of the external magnetic field. As shown in FIG. 4, the signal extracting means 6 comprises a detection circuit 34 for obtaining, for example, an amplitude waveform of a signal which changes according to the intensity of the external magnetic field H by the magnetic sensor 1.

The detection circuit 34 includes a diode 35 and a resistor 36.
And a smoothing circuit including a capacitor 37. The output terminal 38-1 of the detection circuit 34 thus configured
As shown in FIG. 5 (b), a characteristic proportional to the strength of the DC component of the external magnetic field H is obtained between the two terminals 38 and 38-2.
That is, when the external magnetic field H is weak, the output terminals 38-1 and 38-1
The voltage between both terminals of -2 increases, and when the external magnetic field H is strong, the voltage between both terminals decreases. Thus, the magnetic sensor 1 can detect a signal voltage proportional to the change in the intensity of the external magnetic field H.

FIG. 6 is a diagram showing a configuration example of a circuit using the magnetic wire 3 as an oscillation element of a self-oscillation type circuit. This circuit is a well-known Colpitts type LC oscillation circuit. Magnetic wire
3 is connected between the collector and the base of the transistor 40, and a current limiting resistor 4 is connected between the emitter of the transistor 40 and the ground. Also transistor 40
A capacitor 41 (C1) is connected between the collector of the transistor 40 and one end of the current limiting resistor 4, and a capacitor 42 (C2) is connected between the base of the transistor 40 and one end of the current limiting resistor 4. A self-oscillation circuit using the line 3 as the inductance of the oscillation element is constructed.

The oscillation frequency of the self-oscillation circuit configured as shown in FIG. 6 is determined by the inductance of the magnetic wire 3 and the values of the capacitors 41 (C1) and 42 (C2). it can. In an actual circuit, these circuit constants correspond to the connected lead wire 32-1 and
This value includes the inductance such as 32-2 and the stray capacitance.

[0033]

(Equation 1) Also, from FIG. 6, a signal proportional to the strength of the externally applied magnetic field is detected using the fact that the impedance of the magnetic wire 3 changes due to the externally applied magnetic field in the same manner as described in the principle circuit of FIG. can do.

Here, printed with magnetic ink,
For example, a US dollar bill has a residual magnetic strength of about 10 ^-4 Oe (Oersted) to 10 ^-3 Oe (Oersted) in a space about 1 mm away from the surface. As shown in FIG. 3, the magnetic sensor 1 is arranged at a right angle so as to face the surface of the test bill 20 as shown in FIG.
Is arranged at a predetermined distance from the surface of the test bill 20.

The magnetic sensor 1 thus arranged
Scans the magnetic printing unit 22 of the banknote 20 to be examined so as to face the banknote, and gives an output signal obtained from the magnetic sensor 1 to the signal extracting means 6 (FIG. 1). The signal extracting means 6 extracts a signal which changes in response to the magnetic printing unit 22 of the banknote 20 to be inspected by the magnetic sensor 1. The signal extracting means 6 obtains a signal waveform as shown in FIG. The output of the signal extracting means 6 is input to the comparing and judging means 7 as shown in FIG.
Further, the comparison determination means 7 is connected to the reference value signal generation means 8, and the reference value signal generation means 8 includes an appropriate bill, that is, an acceptable circulation bill of a predetermined denomination. Reference values (upper limit, lower limit) are set.
The reference value set in the reference value signal generating means 8 is a function value obtained from statistical data obtained by previously measuring such a circulation bill using the magnetic sensor 1.

The comparing and judging means 7 compares the signal inputted from the signal extracting means 6 with the signal inputted from the reference value signal generating means 8 and determines whether the signal inputted from the signal extracting means 6 is within the reference value. It is determined whether or not there is, and if the signal is within the reference value, a signal indicating that the test bill 20 is true is output to an external device (not shown). However, when the signal deviates from the reference value, a signal indicating that the test bill 20 is false is output to an external device (not shown). In this way,
The authenticity of the banknote to be inspected can be inspected.

FIG. 7 shows that the magnetic printing section 22 and the non-magnetic printing section 21 of a given acceptable circulation banknote of a predetermined denomination are switched and identified from the detection output of the magnetic sensor 1. FIG. 10 is a block diagram showing another embodiment of the present invention.

In FIG. 7, the magnetic sensor 1 is a magnetic inductance type magnetic sensor, and the means for inspecting the banknote 20 to be inspected by using a signal obtained from the magnetic sensor 1 is shown in FIG.
Is similar to the circuit shown in FIG. In FIG. 7, parts performing the same functions as in the embodiment shown in FIG. 1 are denoted by the same reference numerals as those used in FIG. Omitted.

In FIG. 7, the magnetic sensor 1-1 inspects the magnetic printing portion 22 of the banknote 20 shown in FIG. 2, and the magnetic sensor 1-2 inspects the non-magnetic printing portion of the banknote 20 shown in FIG. Is what you do.

The changeover switch 10 is a switch that operates based on an output signal from the changeover circuit 12, and the changeover switch 10 extracts one of the outputs of the magnetic sensors 1-1 and 1-2 to extract a signal. Switched for input to means 6. The changeover switch 10 is switched by an output signal from a changeover circuit 12 operated by a changeover signal from an external device (not shown).

The output signal of one of the magnetic sensors 1-1 and 1-2 selected by the changeover switch 10 is inspected by the inspection means 2. The signal extraction means 6 of the inspection means 2 is a magnetic sensor
At least one of a signal which changes in response to the magnetic printing portion 22 of the banknote 20 to be inspected and a signal which responds to the non-magnetic printing portion is extracted. Signal extraction means 6
The signal extracted in step (1) is compared with the reference value generated by the reference value signal generation means 11 in the comparison determination means 7.

If the signal is within the reference value, the comparison judging means 7 determines that the banknote to be inspected 20 matches the banknote of the predetermined denomination and determines that the banknote to be inspected 20 is true. Is output to an external device (not shown). However, when the signal deviates from the reference value, a signal indicating that the test bill 20 is false is output to an external device (not shown). In this way, the portion where the test bill 20 has the magnetic printing portion 22,
Inspection of the banknotes that do not have a magnetic response at a predetermined location on the banknote to be inspected, or a magnetic response at a location where a magnetic response should not occur. can do.

Here, the reference value signal generating means 11 changes the generated reference value with respect to the operation of the changeover switch 10 according to the output signal of the changeover circuit 12. This is a signal detected by the magnetic sensor 1-1 that detects the magnetic printing unit 22,
This is because the magnetic sensors 1-2 have different reference values for determining a signal indicating detection of a non-magnetic printing portion.

The magnetic inductance type magnetic sensor 1
As shown in FIG. 3, the surface other than the surface facing the test bill 20 is surrounded by a magnetic shield 33 to improve the detection accuracy. The magnetic shield 33 can block magnetic flux leakage generated from a power supply of a bill validator (not shown) or a transport motor 53 that transports the test bill 20. As a result,
The S / N ratio of the signal detected from the magnetic sensor 1 is improved, and the detection accuracy is improved. FIG. 8 shows an example of the detection output waveform of the magnetic inductance type magnetic sensor 1 for the magnetic printing section 22 of the banknote 20 to be inspected. At the position where the test bill 20 is conveyed and faces the magnetic printing unit 22 (position A in the figure),
The detection output of the magnetic inductance type magnetic sensor 1 starts oscillating. Here, the difference in the magnitude of the waveform of the detection output is due to the difference in the strength of the detected residual magnetic field of the magnetic printing unit 22. The strength of the detected magnetic field can be determined from the magnitude of the output waveform of the detection output.

FIG. 9 is a side view showing a schematic configuration of an embodiment of a bill validator employing the method and apparatus for inspecting the authenticity of a bill to be inspected according to the present invention, and FIG. 10 is a plan view thereof. is there.

As shown in FIG. 9 and FIG. 10, this bill discriminating apparatus includes a transport passage 51 for guiding a bill to be inspected from an insertion port 50 in an arrow direction, and a bill to be inspected inserted from the insertion port 50 in an arrow direction. Inlet sensors 58-1, 58-2 to be detected, transport belts 56-1, 56-2 and rollers 57-1, 57-2, which transport the test bill inserted from the insertion port 50 along the transport path 51. 57-3,57-4,57-
The magnetic printing section shown in FIG. 2 formed on the banknote 20 to be inspected conveyed by 5,57-6,57-7,57-8,57-9,57-10,57-11,57-12
Magnetic sensor 1 for detecting 22; worm gears 54-1,54-2 for transmitting power to conveyor belts 56-1,56-2; worm gear 54
-1,54-2.

Next, the operation of the bill validator 100 will be described.

The banknote 20 to be inspected inserted from the insertion slot 50 moves in the direction of the arrow and is detected by the entrance sensors 58-1 and 58-2 of the optical sensor, and is illustrated based on a signal output from the entrance sensor 58. The motor 53 is started by the control means that does not. The output shaft of the motor 53 is connected to the worm gears 54-1, 54-2, transmitting the power of the motor 53 to the pulleys 55-1, 55-3, and moving the pulleys 55-1, 55-3 in a predetermined direction. Rotate. Also, the motor
Between the pulley 55-1 rotated by the power of 53 and the pulley 55-2 arranged at a predetermined distance, and between the pulley 55-3 and the pulley 55-4 arranged at a predetermined distance, respectively. The conveyor belt 56-1 and the conveyor belt 56-2
-1,56-2.

Also, rollers 57-1, 57-2, 57-3, 57-4, 57-5, 57-6, and rollers 57-1, 57-2, 57-3,
57-7,57-8,57-9,57-10,57-11,57-12 are provided,
The roller 57 presses the test bill 20 so as to sandwich it, and conveys the test bill 20. The banknote 20 inserted from the insertion slot 50 moves in the direction of the arrow, and eventually reaches the detection area of the magnetic sensor 1 and further moves. Magnetic sensor 1
Detects the magnetic printing unit 22 shown in FIG. 2 formed on the moving test bill 20 in a non-contact manner, and outputs a responsive signal. (Other Embodiments) In FIG. 6, a Colpitts type oscillation circuit is shown as an example of an oscillation circuit.
It may be replaced with a clamp type oscillation circuit or a ramp-kin type oscillation circuit.

[0050]

As described above, according to the present invention, a non-contact type magnetic sensor is provided in the bill conveying path of the bill discriminating apparatus, and based on the detection output of this magnetic sensor, the inserted bill to be inspected is detected. Whether or not a predetermined magnetic printing portion is formed, because it is configured to detect at least one of the non-magnetic printing portion from the non-magnetic printing portion in a non-contact manner, a miracle of the detection position on the surface of the test bill. The security is improved without any loss, and the contactless operation eliminates mechanical wear and extends the life of the device. In addition, it is possible to prevent the bill itself from being deteriorated due to breakage or the like due to non-contact, and to perform appropriate processing of the bill.

[Brief description of the drawings]

FIG. 1 is a block diagram showing an embodiment of a circuit for checking the authenticity of a bill to be inspected according to the present invention.

FIG. 2 is a diagram showing a configuration example of a banknote to be inspected.

3 (a) is a diagram showing one configuration example of a magnetic inductance type magnetic sensor used in the embodiment of FIG. 1, and FIG. 3 (b) is a diagram showing another configuration example.

FIG. 4 is a circuit diagram showing the operation principle of a magnetic inductance type magnetic sensor.

5 (a) is a waveform diagram of a current supplied to a magnetic inductance type magnetic sensor, and FIG. 5 (b) is an output characteristic diagram of the sensor.

FIG. 6 is a circuit diagram showing a circuit configuration example of a magnetic inductance type magnetic sensor.

FIG. 7 is a block diagram showing another embodiment of the circuit for checking the authenticity of a bill to be inspected according to the present invention.

FIG. 8 is a waveform chart showing an output example of a magnetic inductance type magnetic sensor.

FIG. 9 is a side view showing a schematic mechanism of one embodiment of the present invention.

FIG. 10 is a plan view corresponding to FIG. 9 showing a schematic mechanism of one embodiment of the present invention.

[Explanation of symbols]

1 Magnetic inductance type magnetic sensor 2 Inspection means 3 Magnetic wire 4 Current limiting resistor 5 Oscillation circuit 6 Signal extraction means 7 Comparison judgment means 8 Reference value signal generation means 10 Changeover switch 11 Reference value signal generation means 12 Switching circuit 20 Banknote 21 Printing area 22 Magnetic printing section 30 Printed circuit board 31-1 and 31-2 terminals (terminals to connect magnetic wires) 32-1,32-2 Lead wire 33 Magnetic shield 34 Detection circuit 35 Diode 36 Resistance 37 Capacitor 38-1,38- 2 Output terminal 40 Transistor 41 Capacitor (C1) 42 Capacitor (C2) 50 Insertion port 51 Transport passage 52-1,52-2 Passage wall 53 Motor 54-1,54-2 Worm gear 55-1,55-2,55- 3,55-4 Pulley 56-1,56-2 Transport belt 57-1,57-2,57-3,57-4,57-5,57-6,57-7,57-8,57-9 , 57-1
0,57-11,57-12 Roller 58-1,58-2 Inlet sensor

Claims (11)

[Claims] 1. A method for inspecting the authenticity of a banknote to be inspected in a non-contact manner, wherein a non-contact type magnetic sensor is arranged at a predetermined position of the banknote transport path in close proximity to the transport path. Checking the authenticity of the bill based on a signal output from the magnetic sensor as the sheet is transported along the transport path. 2. The method according to claim 1, wherein the magnetic sensor is characterized in that a voltage with respect to a time change of a circumferential magnetic flux generated by applying a high-frequency current to a magnetic wire is changed as a change due to an externally applied magnetic field. Prepare a magnetic inductance type magnetic sensor to be detected, and inspect the authenticity of the banknote based on a signal output in response to the strength of the residual magnetic field of the magnetic ink printed on the banknote from the magnetic inductance type magnetic sensor. A method for inspecting the authenticity of banknotes. 3. The banknote authenticity inspection method according to claim 1, wherein the magnetic sensor is disposed corresponding to a position of a predetermined printing unit printed on the surface of the banknote with magnetic ink, and A banknote authenticity inspection method, wherein the banknote is authenticated based on a signal obtained by scanning a predetermined printed portion of the banknote from a sensor. 4. The banknote authenticity inspection method according to claim 1, wherein the magnetic sensor is arranged in accordance with an arrangement position of a predetermined printing portion printed with magnetic ink on at least one of a front surface and a back surface of the banknote. A method for inspecting the authenticity of a bill based on a signal obtained by scanning a predetermined printed portion of the bill from the magnetic sensor. 5. The banknote authenticity inspection method according to claim 1, wherein the magnetic sensor is provided in a first position corresponding to a position of a predetermined printing unit printed on the surface of the banknote with magnetic ink. A magnetic sensor, and a second magnetic sensor disposed corresponding to a position where a predetermined printing unit printed on the bill surface with non-magnetic ink is provided, wherein the second magnetic sensor is provided from the first magnetic sensor. The banknote based on at least one of a signal obtained by scanning a predetermined magnetic ink printing portion of the banknote and a signal obtained by scanning a predetermined nonmagnetic ink printing portion of the banknote from the second magnetic sensor. A method for inspecting the authenticity of a banknote, comprising inspecting the authenticity of a bill. 6. An apparatus for inspecting the authenticity of a test bill in a non-contact manner, wherein the non-contact type magnetic sensor is disposed at a predetermined position of the bill transport path in close proximity to the transport path. An apparatus for inspecting the authenticity of a banknote, comprising: an inspection unit for inspecting the authenticity of the banknote based on a signal output from the magnetic sensor as the banknote is conveyed along the conveyance path. . 7. The banknote authenticity inspection device according to claim 6, wherein the magnetic sensor is a magnetic inductance type magnetic device using a self-oscillation circuit that oscillates at a predetermined frequency so that a magnetic wire forms an element of an oscillation circuit. A signal extraction unit configured to detect and extract a signal that changes due to a residual magnetic field of the magnetic ink portion of the bill, and the authenticity distribution of the face value by the magnetic sensor. A reference value signal generating unit that generates a reference value signal that is a function value obtained by testing a bill; a signal obtained from the signal extracting unit by scanning the bill with the magnetic sensor; and the reference value signal generation. Means for comparing with a reference value signal from the means, wherein the signal from the signal extracting means is a reference signal. When the value signal matches within a predetermined allowable range, a signal indicating that the bill is authentic is generated. 8. The authenticity of a banknote according to claim 7, wherein said magnetic inductance type magnetic sensor has a magnetic shield on a surface other than a surface facing said transport passage. Inspection equipment. 9. The banknote authenticity inspection apparatus according to claim 6, wherein the magnetic sensor is provided corresponding to an arrangement position of a predetermined printing unit printed on the surface of the bill with magnetic ink. Means for inspecting the authenticity of the bill based on a signal obtained by scanning a predetermined printed portion of the bill from the magnetic sensor; 10. The banknote authenticity inspection apparatus according to claim 6, wherein the magnetic sensor is arranged in accordance with an arrangement position of a predetermined printing unit printed with magnetic ink on at least one of a front surface and a back surface of the banknote. Wherein the inspection means inspects the authenticity of the bill based on a signal obtained by scanning a predetermined printed portion of the bill from the magnetic sensor, wherein the authenticity of the bill is inspected. 11. A banknote authenticity inspection apparatus according to claim 6, wherein said magnetic sensor is provided corresponding to a position of a predetermined printing section printed on said bill surface with magnetic ink. A magnetic sensor, and a second magnetic sensor disposed corresponding to a position of a predetermined printing unit printed on the bill surface with a non-magnetic ink, wherein the inspection unit comprises: A switching unit that switches and outputs a first signal from a magnetic sensor and a second signal from the second magnetic sensor; and a predetermined magnetic ink printing unit of the bill extracted through the switching unit. Based on the first signal obtained by scanning the first magnetic sensor, or the second signal obtained by scanning the predetermined non-magnetic ink printing portion of the bill by the second magnetic sensor Checking the authenticity of the bill Authenticity checking device banknotes characterized.