JPH117565A - Method and device for checking authenticity of paper money - Google Patents

Abstract

PROBLEM TO BE SOLVED: To check the authenticity of paper money to be checked without contacting by disposing a thin film flux gate type magnetic sensor near a carrying path at the prescribed position of the carrying path of the paper money and checking the authenticity of the paper money based on signals outputted from the magnetic sensor as the paper money is carried along the carrying path. SOLUTION: The thin film flux gate type magnetic sensor 1 is arranged so as to make a detection surface face the surface of the paper money to be checked and the magnetic sensor 1 is arranged away from the surface of the paper money to be checked for a prescribed distance. The magnetic sensor 1 scans the magnetic mark of the paper money to be checked so as to face it and supplies output signals to a magnetic sensor control means 2 and the magnetic sensor control means 2 extracts changing signals and inputs them to a comparison and judgement means 10. The comparison and judgement means 10 compares the signals inputted from the magnetic sensor control means 2 and a reference value signal generation means 11, judges whether or not the input signals from the magnetic sensor control means 2 are within a reference value and outputs the result to an external device. Thus, the authenticity of the paper money to be checked is checked.

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 intensity of remanence in a space about 1 mm away from the surface is about 10 ^-4 Oe (Oersted) to 10 ^-3 Oe (Oersted). This is 1/100 to 1/10 of geomagnetism
It corresponds to a strength of 00.

A conventional apparatus generally uses a magnetic head as a method for detecting magnetic ink. 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.

However, both of these magnetic heads have low sensitivity. In other words, even among the MR heads with relatively high sensitivity among the above, the sensitivity is 10 ^-2
Oe (Oersted). With a conventional magnetic head having only such sensitivity, it is difficult to obtain a signal of the magnetic ink portion without contact.

Therefore, a conventional magnetic head is used in such a manner that the magnetic head is brought into contact with a magnetic ink portion printed on the surface of a bill,
Further, in order to ensure the contact between the banknote and the magnetic head, the banknote is scanned so as to be sandwiched between the magnetic head and the roller, and the signal obtained at that time is used to check whether or not the test banknote is authentic. I was

[0007]

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 convenient goal for those who intentionally attempt to mischief, and has security problems such as deceiving the device.

On the other hand, as described above, since bills are conveyed while being sandwiched between the magnetic head and the roller, there is a problem that the bills are easily jammed in the magnetic head portion of the conveying 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.

Accordingly, the present invention is to improve the security and to prevent the bill and the inspection device from being worn, so that the authenticity of the bill can be inspected in a non-contact manner. It is an object to provide an inspection method and apparatus.

[0010]

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 thin-film fluxgate magnetic sensor, which is a non-contact magnetic sensor, is disposed, and the authenticity of the bill is determined based on a signal output from the magnetic sensor as the bill is transported along the transport path. It is characterized by inspecting.

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.

Further, according to the present invention, there is provided an apparatus for inspecting the authenticity of a banknote to be inspected in a non-contact manner, wherein the thin-film fluxgate type magnetic sheet is disposed at a predetermined position of the banknote transport path in close proximity to the transport path. It may be configured to include a sensor 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 inspection means includes signal extraction means for detecting and extracting a signal which is changed by the residual magnetic field of the magnetic ink portion of the bill by the thin film fluxgate magnetic sensor, and a bill relating to a true bill of a predetermined face value. A reference value signal generating means for generating a reference value signal for inspection, a signal from the signal extracting means obtained by scanning the bill with the magnetic sensor, and a reference value signal from the reference value signal generating means. And a comparing and judging means for comparing, wherein the comparing and judging means outputs 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 occur,
The reference value signal may be configured to be a function value obtained by testing a genuine circulation bill on the face value in the magnetic sensor, and the authenticity of the bill is inspected.

The thin film flux gate magnetic sensor may 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 thin film flux gate type magnetic sensor which is a type of a non-contact magnetic sensor. This thin film flux gate type magnetic sensor 1 detects the influence of the action of the external magnetic field on the magnetic sensor 1 in cooperation with the magnetic sensor control means 2,
The detection signal is given to the judgment means 3.

The thin film flux gate type magnetic sensor has a structure in which an excitation coil and a detection coil are wound around a closed magnetic path core, and its operation principle is based on the excitation coil wound around the closed magnetic path core. A high-frequency excitation magnetic field is applied to the closed magnetic circuit core, and the induced current caused by the exciting magnetic field is detected by a detection coil wound around the closed magnetic circuit core. The change in state is detected by a detection coil.

Then, the detection signal of the magnetic sensor 1 is given to the determination means 3 via the magnetic sensor control means 2. The determination means 3 has a comparison determination means 10 and a reference value signal generation means 11, and forms an output signal corresponding to the detection signal of the magnetic sensor 1.

Also, a thin film flux gate type magnetic sensor 1
Can use an impedance change with respect to an external magnetic field, that is, an externally applied magnetic field. The thin film flux gate type magnetic sensor having such features 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 thin film flux gate type magnetic sensor. As shown in FIG. 3, the magnetic sensor 1 is formed in a chip shape having a size of several mm on one side, and a wiring pattern such as a coil is formed on a substrate by a photolithography technique and an etching technique. To form an insulating layer and a magnetic core layer. The magnetic core layer is formed in a ring shape, and a coil and its lead are formed with an insulating layer interposed between the magnetic core layer.

The excitation coil 31 connected to the excitation source 6 is provided on the ring-shaped magnetic core layer, that is, the ring core 30.
And a detection coil that is differentially connected by inverting connection at the middle part
32 and are wound. The excitation source 6 has a frequency of 50, for example.
A high-frequency current of 0 kHz is supplied to the excitation coil 31, whereby the ring core 30 is excited at a high frequency.
Then, the excitation state of the ring core 30 is detected by the detection coil 32. The ring core 30 is placed so that the ring surface is parallel to the surface of the test bill, and the ring core 30 excited by the excitation coil 31 according to the magnetization state of the test bill receives a magnetic action. Thus, the detection coil 32 detects the magnetization state of the test bill.

FIG. 4 is a BH characteristic diagram for explaining the operation principle of the magnetic sensor 1 as input and output. As shown in FIG. 4, if there is no external magnetic field around the magnetic sensor 1,
The high-frequency excitation current swings around the operating point 0, and the output signal also has a +/- symmetrical waveform around the 0 point. On the other hand, if there is an external magnetic field, a bias is applied by the external magnetic field.
The waveform moves to the side, and the + side waveform is blocked, and the − side waveform becomes a signal having a large amplitude like a sine wave.

If there is no external magnetic field, the magnetic flux in the ring core 30 changes in a rectangular wave shape, so that the signal guided to the receiving coil and output from the output terminal contains odd harmonics. When an external magnetic field is present, the magnetic field is strengthened in one direction, and the change in magnetic flux in the ring core 30 due to the exciting current is not saturated in one direction (negative direction in FIG. 4) as shown in FIG. .

Thus, the signal induced by the receiving coil and output from the output terminal includes even harmonics in addition to odd harmonics, and the magnitude of the even harmonics depends on the external magnetic field. It is proportional to the magnitude of the DC component. Therefore, the magnetic sensor scans the portion of the test bill printed with the magnetic ink, and when a magnetic field corresponding to the external magnetic field acts, the magnetic sensor forms an output signal corresponding thereto.

FIG. 5 shows the external shape of the magnetic sensor 1. A sensor structure as shown in FIG. 3 is provided on a substrate 42 housed in a magnetic shield 41 and connected to a lead wire 40. deep. The magnetic shield 41 is open only on the detection surface, that is, the surface facing the bill (the lower surface in FIG. 5), and the other surface is closed, so that the influence of magnetic disturbance is prevented as much as possible.

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. The magnetic sensor 1 is used for the test bill 20 having such residual magnetism.
Are arranged so that the detection surface faces the surface of the test bill 20, and the magnetic sensor 1 is disposed at a predetermined distance from the surface of the test bill 20.

The magnetic sensor 1 arranged as described above scans the magnetic printing portion 22 of the test bill 20 so as to face the same,
At that time, an output signal obtained from the magnetic sensor 1 is given to the magnetic sensor control means 2 (FIG. 1). Magnetic sensor control means 2
The magnetic sensor 1 extracts a signal that changes in response to the magnetic printing unit 22 of the banknote 20 to be inspected. A signal waveform as shown in FIG. The output of the magnetic sensor control means 2 is input to the comparison determination means 10 as shown in FIG. Further, the comparison determination means 10 is connected to the reference value signal generation means 11, and the reference value signal generation means 11 is provided with an appropriate bill, that is, an acceptable circulation bill of a predetermined given denomination. Reference value (upper limit, lower limit)
Is set. The reference value set in the reference value signal generating means 11 is based on statistical data, and the statistical data is a function value obtained by previously measuring a circulation bill using the magnetic sensor 1.

The comparing and judging means 10 includes the magnetic sensor control means 2
Is compared with the signal inputted from the reference value signal generating means 11 to judge whether the signal inputted from the magnetic sensor control means 2 is within the reference value or not. If it is inside, 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). Thus, the authenticity of the test bill can be inspected.

FIG. 6 is a block diagram showing another embodiment of the present invention.
The magnetic printing unit 22 and the non-magnetic printing unit 21 are switched and identified.

In FIG. 6, the magnetic sensor 1 is a thin-film flux gate 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 the same as the circuit shown in FIG. is there. In FIG. 6, FIG.
The same reference numerals as in FIG. 1 denote parts performing the same functions as those in the embodiment shown in FIG. 1 and indicate corresponding parts, and a detailed description thereof will be omitted.

In FIG. 6, the magnetic sensor 1-1 is for inspecting the magnetic printing portion 22 of the banknote 20 shown in FIG. Is to be inspected.

The changeover switch 12 is a switch that operates based on an output signal from the changeover circuit 14. The changeover switch 12 outputs one of the outputs of the magnetic sensors 1-1 and 1-2 to the magnetic sensor. Switching is performed for input to the control means 2.
The changeover switch 12 is changed over in response to an output signal from a changeover circuit 14 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 12 is given to the determination means 3 via the magnetic sensor control means 2. The signal provided to the determination means 3 via the magnetic sensor control means 2 is compared by the comparison determination means 10 with the reference value generated by the reference value signal generation means 11.

If the signal is within the reference value, the comparison / judgment means 10 determines that the banknote 20 to be tested is true, and that the banknote 20 to be tested 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,
By inspecting the part that does not have this and other parts, it is possible to accurately detect illegal banknotes that have no magnetic reaction at a predetermined place on the banknote to be inspected or a magnetic reaction at a place where there should be no magnetic reaction. Can be inspected.

Here, the reference value signal generating means 11 changes the generated reference value for the operation of the changeover switch 12 according to the output signal of the changeover circuit 14. This is the signal detected by the magnetic printing unit 22 detected by the magnetic sensor 1-1,
This is because the reference values for judging the signal from the magnetic sensor 1-2 detecting the non-magnetic printing portion are different from each other.

Also, a thin film flux gate type magnetic sensor
In FIG. 5, a surface other than the surface facing the test bill 20 is surrounded by a magnetic shield 41 as shown in FIG. The magnetic shield 41 can shut off a leakage magnetic flux generated from a power source of a banknote recognition device (not shown) or a transport motor 53 that transports the banknote 20 to be inspected. 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. 7 shows an example of a detection output waveform of the thin film fluxgate type magnetic sensor 1 obtained by scanning the magnetic printing section 22 of the banknote 20 to be inspected. The banknote 20 to be inspected is conveyed, and at a position facing the magnetic printing unit 22 (position A in the figure),
The detection output of the thin film flux gate 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. 8 is a side view showing a schematic configuration of an embodiment of a bill validating apparatus employing the method and apparatus for inspecting the authenticity of a bill to be inspected according to the present invention, and FIG. 9 is a plan view thereof. is there.

As shown in FIG. 8 and FIG. 9, this bill discriminating apparatus inserts a bill to be inspected into an insertion slot 50 as a main constituent element.
From the conveyance path 51, which guides in the direction of the arrow, and the entrance sensors 58-1, 5 which detect the banknote to be inspected inserted in the direction of the arrow from the insertion opening 50.
8-2, transport belts 56-1, 56-2 and rollers 57-1, which transport the banknote to be inspected inserted from the insertion slot 50 along the transport path 51.
57-2,57-3,57-4,57-5,57-6,57-7,57-8,57-9,57-10,57-1
1, 57-12, a magnetic sensor 1 for detecting the magnetic printing section 22 shown in FIG. 2, worm gears 54-1,54-2, and worm gears 54-1,54 for transmitting power to the conveyor belts 56-1,56-2. -2 driving motor
It has 53.

Next, the operation of the bill validator 100 will be described. The banknote 20 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. Based on a signal output from the entrance sensor 58, control means (not shown) To start the motor 53. The output shaft of the motor 53 is connected to the worm gears 54-1, 54-2,
The power of the motor 53 is transmitted to the pulleys 55-1 and 55-3, and the pulley 55-
1,55-3 is rotated in a predetermined direction. Further, between the pulley 55-1 that is rotated by the driving force of the motor 53 and the pulley 55-2 disposed at a predetermined distance, and between the pulley 55-3 and the pulley 55-4 disposed at a predetermined distance. Are transported by conveyor belts 56-1 and 56-2, respectively.
Drive 6-2.

Further, rollers 57-1,57-2,57-3,57-4,57-5,57-6, 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 so as to sandwich it, and conveys the test bill. The bill to be inspected 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. The magnetic sensor 1 detects the magnetic printing unit 22 shown in FIG. 2 formed on the moving test bill in a non-contact manner and outputs a responsive signal.

[0049]

As described above, according to the present invention, a thin-film fluxgate type magnetic sensor is provided in the bill conveyance path of the bill validator, and based on the detection output of this magnetic sensor,
Whether or not a predetermined magnetic printing portion is formed on the inserted banknote to be inspected, so that at least one of whether or not there is a magnetic reaction from the non-magnetic printing portion is configured to be detected in a non-contact manner,
The trajectory of the detection position does not remain on the surface of the banknote to be inspected, thereby improving security. In addition, since it is non-contact, there is no mechanical wear and the life of the apparatus is extended. 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 banknote to be inspected according to the present invention.

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

FIG. 3 is a diagram showing a configuration example of a thin-film fluxgate magnetic sensor used in the embodiment of FIG. 1;

FIG. 4 is a characteristic diagram showing an operation principle of the thin film flux gate magnetic sensor.

FIG. 5 is a view showing a structure of a thin film flux gate type magnetic sensor.

FIG. 6 is a block diagram showing another embodiment of the circuit for checking the authenticity of a banknote to be inspected according to the present invention.

FIG. 7 is a diagram showing an output waveform obtained by scanning a test bill with a thin-film fluxgate magnetic sensor.

FIG. 8 is a side view showing a schematic mechanism of one embodiment of the present invention.

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

[Explanation of symbols]

1 Thin film flux gate type magnetic sensor 2 Magnetic sensor control means 3 Judgment means 4 Oscillation means 5 1/2 frequency division means 6 Excitation drive means 7 AC amplification means 8 Synchronous detection means 10 Comparison and judgment means 11 Reference value signal generation means 12 Switching circuit 13 Reference value signal generating means 20 Banknote 21 Printing area 22 Magnetic printing section 30 Magnetic core (ring core) 31 Exciting coil 32 Detection coil 40 Lead wire 41 Magnetic shield 42 Board 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 (10)

[Claims] 1. A method for inspecting the authenticity of a banknote to be inspected in a non-contact manner, wherein a thin film flux gate type magnetic sensor is arranged at a predetermined position of the banknote transport path in proximity to the transport path. As the bill is transported along the transport path, the authenticity of the bill is inspected based on a signal output from the magnetic sensor. 2. The banknote authenticity inspection method according to claim 1, wherein the magnetic sensor is disposed in correspondence with a predetermined printing portion disposed on a surface of the banknote with magnetic ink, and wherein the magnetic sensor is provided. 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. 3. The banknote authenticity inspection method according to claim 1, wherein the magnetic sensor is arranged corresponding to 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. 4. The banknote authenticity inspection method according to claim 1, wherein the magnetic sensor is disposed in correspondence with a predetermined printing portion disposed on a 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. 5. An apparatus for inspecting the authenticity of a banknote to be inspected in a non-contact manner, comprising: a thin film flux gate type magnetic sensor disposed at a predetermined position of the banknote transport path in close proximity to the transport path; Inspection means for inspecting the authenticity of the bill characterized by comprising inspection means for inspecting the authenticity of the bill based on a signal output from the magnetic sensor as the bill is conveyed along the conveyance path. apparatus. 6. The banknote authenticity inspection apparatus according to claim 5, wherein said inspection means comprises a signal for detecting and extracting a signal which is changed by said thin film fluxgate type magnetic sensor due to a residual magnetic field of a magnetic ink portion of said banknote. Extracting means, a reference value signal generating means for generating a reference value signal which is a function value obtained by testing the genuine distribution bill on the face value by the magnetic sensor, and by scanning the bill by the magnetic sensor Comparing a signal obtained from the signal extracting means with a reference value signal from the reference value signal generating means, and comparing and judging means, wherein the comparing and judging means converts the signal from the signal extracting means into the reference value signal. On the other hand, when matched within a predetermined allowable range, a signal indicating that the bill is genuine is generated, wherein the bill is authenticated. 7. The authenticity of a banknote according to claim 5, wherein said thin-film fluxgate magnetic sensor has a magnetic shield on a surface other than a surface facing said transport passage. Sex test equipment. 8. The banknote authenticity inspection apparatus according to claim 5, wherein the magnetic sensor is provided corresponding to an arrangement position of a predetermined printing section 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; 9. The banknote authenticity inspection apparatus according to claim 5, 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. 10. The banknote authenticity inspection device according to claim 5, wherein the magnetic sensor is provided 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 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.