WO1999044176A1 - Procede et dispositif permettant de detecter une fausse piece de monnaie - Google Patents

Procede et dispositif permettant de detecter une fausse piece de monnaie Download PDF

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Publication number
WO1999044176A1
WO1999044176A1 PCT/JP1999/000881 JP9900881W WO9944176A1 WO 1999044176 A1 WO1999044176 A1 WO 1999044176A1 JP 9900881 W JP9900881 W JP 9900881W WO 9944176 A1 WO9944176 A1 WO 9944176A1
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WO
WIPO (PCT)
Prior art keywords
coin
coil
authenticity
receiving
exciting
Prior art date
Application number
PCT/JP1999/000881
Other languages
English (en)
Japanese (ja)
Inventor
Yonezo Furuya
Original Assignee
Kabushiki Kaisha Nippon Conlux
Priority date (The priority date is an assumption and is not a legal conclusion. Google has not performed a legal analysis and makes no representation as to the accuracy of the date listed.)
Filing date
Publication date
Application filed by Kabushiki Kaisha Nippon Conlux filed Critical Kabushiki Kaisha Nippon Conlux
Priority to CA002288297A priority Critical patent/CA2288297C/fr
Priority to KR1019997008409A priority patent/KR100562857B1/ko
Priority to AU25494/99A priority patent/AU729021B2/en
Priority to EP99905308A priority patent/EP0978807A4/fr
Priority to US09/403,824 priority patent/US6325197B1/en
Publication of WO1999044176A1 publication Critical patent/WO1999044176A1/fr

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Classifications

    • G—PHYSICS
    • G07—CHECKING-DEVICES
    • G07D—HANDLING OF COINS OR VALUABLE PAPERS, e.g. TESTING, SORTING BY DENOMINATIONS, COUNTING, DISPENSING, CHANGING OR DEPOSITING
    • G07D5/00—Testing specially adapted to determine the identity or genuineness of coins, e.g. for segregating coins which are unacceptable or alien to a currency
    • G07D5/08—Testing the magnetic or electric properties
    • G—PHYSICS
    • G07—CHECKING-DEVICES
    • G07D—HANDLING OF COINS OR VALUABLE PAPERS, e.g. TESTING, SORTING BY DENOMINATIONS, COUNTING, DISPENSING, CHANGING OR DEPOSITING
    • G07D5/00—Testing specially adapted to determine the identity or genuineness of coins, e.g. for segregating coins which are unacceptable or alien to a currency
    • G07D5/005—Testing the surface pattern, e.g. relief

Definitions

  • the present invention relates to a method and an apparatus for judging the authenticity of coins by identifying coins, and particularly to the authenticity of coins used in vending machines, game machines and the like. It relates to the method and the device for discrimination.
  • This type of coin identification device generally uses the fall of the coin due to its own weight, so that a passage for guiding the coin inserted from the coin inlet is provided. It is provided. A plurality of sets of induction coils are arranged in this passage, and each set of induction coils is provided with an electromagnetic field that is excited by a different frequency.
  • the inspection of a coin is based on the fact that when a coin passes through an electromagnetic field, the amount of electrical change (frequency change, voltage change, phase change) obtained by the interaction between the electromagnetic field and the coin. Is detected to check the authenticity of the coin.
  • the 500 yen coin of Japan and the 500 won coin of Korea have almost the same material and outer diameter, and the 500 won coin is slightly thicker. For this reason, when this 500 won coin is processed and used as a 500 yen coin, the authenticity of the coin is checked with the thickness, outer shape, and material of the conventional coin. With this method, it was difficult to distinguish between the processed 500 won coin and the 500 yen coin.
  • an optical method such as image processing has been attempted as a means for discriminating coins as described above.
  • the optical device has a problem that dust or the like adheres to the device and impairs the determination of the authenticity of the coin. The problem is that the device becomes larger or more complicated, and as a result, more expensive. was there.
  • An object of the present invention is to provide a method and an apparatus for determining the authenticity of coins that can identify coins with high accuracy.
  • a method of determining the authenticity of a coin according to the present invention is a step of arranging an exciting coil and a receiving coil near a coin path so as to be electromagnetically coupled to each other. And a frequency at which the effect of the demagnetizing field due to the eddy current generated on the surface of the coin when the coil passes through the electromagnetic field is detected by the receiving coil.
  • the coil path in which the exciting coil and the receiving coil are disposed is Form a coin passage so that the coin leans to one side. Further, depending on the material, the penetration of the electromagnetic field into the coin differs depending on the excitation frequency. From this force, the excitation frequency at which the difference in unevenness on the surface of the coin often appears as the difference in the signal from the receiving coil according to the material of the coin to be detected and identified. There is. Therefore, the frequency for exciting the exciting coil is selected and set according to the material of the coin to be identified.
  • an excitation coil disposed near one side of the coin passage so that the magnetic poles face the coin passage inclined at a predetermined angle
  • an excitation coil and an electromagnetic coil disposed in the vicinity of one side of the coin passage.
  • the two receiving coils which have similar characteristics and are arranged near the coin path so that they are coupled to each other, and the exciting coil is excited at a predetermined frequency to generate an electromagnetic field.
  • Exciting means for generating plunger circuit means including a receiving coil, differential amplifying means connected to the plunger means, and detecting means connected to the differential amplifying means.
  • a signal which is connected to the detection means and obtained when the coin passes through the electromagnetic field is compared with a feature of a predetermined denomination stored in advance, and the signal has a predetermined tolerance for the feature.
  • the authenticity of the coin is determined by an identification unit that determines that the coin is true when the coin is within the range.
  • FIG. 1a is a front view showing a configuration of a detection coil for detecting a concavo-convex pattern on a coin surface according to the first embodiment of the present invention
  • FIG. 2 is a block diagram showing a circuit configuration according to the embodiment of the present invention.
  • FIG. 3 is a specific diagram of the circuit in the embodiment
  • FIG. 4 is a front view showing an apparatus for inspecting the authenticity of coins according to an embodiment of the present invention
  • FIG. 5 a is a front view detailing the configuration of the coil in the embodiment of the present invention
  • FIG. 6 is a characteristic diagram showing characteristics of a representative coin in the embodiment of the present invention.
  • FIG. 7 is a comparison diagram showing the specifications of a representative coin in the embodiment of the present invention.
  • FIG. 8 is a flowchart showing the operation according to the embodiment of the present invention.
  • FIG. 9A is a front view showing a configuration of a detection coil for detecting an uneven pattern according to the second embodiment of the present invention
  • FIG. 9B is a sectional view thereof
  • FIG. 10a is a front view showing a configuration of a detection coil for detecting an uneven pattern according to the third embodiment of the present invention
  • FIG. 10b is a cross-sectional view thereof.
  • FIG. 11 a is a front view showing a configuration of a detection coil for detecting an uneven pattern according to a fourth embodiment of the present invention
  • FIG. 12 is an explanatory diagram showing an example in which the portion of the coin passage wall where the receiving coil is arranged in each embodiment of the present invention is made of a material having high magnetic permeability.
  • FIG. 1A An embodiment of the present invention will be described with reference to FIG. 1A, FIG. 1B, and FIG.
  • the detector for identifying coin 3 is composed of one excitation coil 1 and two reception coin coils 2a and 2b.
  • the rail is provided so as to be in contact with the passage wall 7 a on one side of the coin passage 6.
  • the coin passage 6 is inclined at a predetermined angle in order to guide and drop the coin 3, and includes a coin rail 4 disposed at the bottom and a pair of passage walls 7 a and 7 b. It is configured.
  • the passage walls 7a and 7b are arranged to be inclined with respect to the vertical direction so that the coin 3 falls down to the side of the passage wall 7a. It has been done.
  • the surface of the coin rail 4 for applying and guiding the coin is The configuration is such that the passing coin 3 is inclined in the direction of inclination of the passage walls 7a and 7b such that the coin 3 passing therethrough is inclined toward the passage wall 7a.
  • Each of the two receiving coils 2a and 2b is composed of a drum type core 43 and a coil 44 wound around the core 43 as shown in FIG. 5b. .
  • the receiving coils 2a and 2b are connected to the line 5a above the coil coil 4 and connecting the centers of the coils 2a and 2b. Are arranged at a predetermined interval so as to be substantially parallel to the rule 4.
  • the excitation coil 1 is composed of a U-shaped core 40 made of a magnetic material and a coil 41 wound around the core 40.
  • the exciting coil 1 is located above the receiving coils 2a and 2b
  • the center C3 of the core 40 is located at the center C1 of the receiving coil 2a and the receiving coil.
  • Line 5c that is perpendicular to the line 5a connecting the center C2 of the line 2 and that passes through the midpoint M of the line segment C1C2, and that connects the centers of both pole faces 40a.
  • b is arranged so that it is substantially parallel to coil rail 4.
  • the pole face 40a of the core 40 is arranged so as to be parallel to the plane of the coin 3 passing therethrough. Note that 42 in FIG. 5a and 45 in FIG. 5b indicate lead lines.
  • the excitation coil 1 and the receiving coils 2a and 2b arranged as described above are electromagnetically coupled by an electromagnetic field generated by the excitation of the excitation coil 1.
  • the oscillation circuit 11 is, for example, an MPU (My A square wave signal of a specified frequency generated by a cross-processor (unit) or the like is output to the output terminal.
  • the output of the oscillation circuit 11 is connected to the excitation drive circuit 12, and the output of the excitation drive circuit 12 is connected to the excitation coil 1 to excite the excitation coil 1.
  • the exciting coil 1 generates an electromagnetic field around the exciting coil 1 in response to the output signal of the exciting drive circuit 12.
  • an electromotive force corresponding to the intensity of the electromagnetic field generated by the exciting coil 1 is generated in the two receiving coils 2a and 2b.
  • the excitation coil 1 and the receiving coils 2a and 2b be arranged close to the surface of the coin 3 and inspected.
  • the magnetic pole of the exciting coil 1 is arranged near the receiving coils 2a and 2b, the electromagnetic field generated from the magnetic pole acts on the coin 3 The change in the induced demagnetizing current Can be captured in the immediate vicinity.
  • the demagnetizing current due to the skin effect appears remarkably near the outer periphery of the coin, but when the irregularities on the surface of the coin are conspicuous, the change is detected without being limited to the vicinity of the outer periphery of the coin. Can be issued.
  • the detection signals of the reception coils 2a and 2b are converted into an AC voltage signal corresponding to the detection signals by a bridge circuit 13 configured to include the reception coils 2a and 2b. Is generated and output to the differential amplifier 14.
  • the differential amplifier 14 amplifies the AC voltage signal generated by the bridge circuit 13 and outputs it to the detection circuit 15.
  • the detection circuit 15 receives the AC voltage signal amplified by the differential amplifier 14 and outputs a DC voltage signal corresponding to the detection signal to the discrimination circuit 16.
  • the discriminating circuit 16 receives the AD converter 17 DC voltage signal therein, converts it into a digital signal of a corresponding voltage, and outputs the digital signal to the signal inspection circuit 18 inside the discriminating circuit 16.
  • the signal inspection circuit 18 inspects whether or not the coin 3 has a predetermined characteristic, and outputs the result of the inspection to the output terminal 19.
  • the output of the signal inspection circuit 18 is used to drive a distribution solenoid (to be described later) such as a recorder / counter (not shown).
  • FIG. 3 is a detailed diagram specifically showing the block circuit of FIG. Fig. 4 is a front view showing a coin inspection device using a detection coil for detecting this uneven pattern.
  • Fig. 5a is a front view detailing the configuration of the coil, and Fig. 5b is a sectional view thereof.
  • the oscillator circuit 11 is connected by dividing the internal reference clock using the MPU 20. It is configured using the divided frequency means.
  • the excitation coil 1 is connected in parallel with the capacitor C1 so that resonance occurs near a predetermined frequency set by the oscillation circuit 11 to form an LC parallel resonance circuit. .
  • the excitation drive circuit 12 approximates the square wave output from the oscillation circuit 11 to a triangular wave by connecting the transistor TR1 and resistors R3 and R4 connected so as to perform the switching operation. Connected to an integrating coil consisting of a resistor R5, a canister C4, and a resistor R6 to make the waveform change, and to an exciting coil 1 forming an LC parallel resonance circuit. It is composed of a drive circuit consisting of a transistor TR2 and a resistor R7.
  • the bridge circuit 13 includes a capacitor C3 connected in parallel with the reception coil 2a, a capacitor C3 connected in parallel with the reception coil 2b, and a capacitor C3 connected in parallel with the reception coil 2b. And resistors R 1 and R 2.
  • the differential amplifier 14 includes capacitors C5 and C6, which are connected to the output of the bridge circuit 13 so as to couple in an AC manner, and an operational amplifier A1. And a resistor R8, RIO and R9, R11 connected to determine the gain of the operational amplifier.
  • the detection circuit 15 is a diode connected to the coupling capacitor C 7 connected to the output of the differential amplifier 14. It is composed of a rectifying circuit (voltage doubler rectifying circuit) of Dl and the diode D2, and an integrating circuit composed of the resistor R12 and the capacitor C8.
  • the AD converter 17 and the signal inspection circuit 18 of the discriminating circuit 16 are configured using an MPU 20 (microprocessor 'unit).
  • the oscillation circuit 11 outputs a square wave signal of a set predetermined frequency, and the frequency is controlled by the electromagnetic field in order to detect the difference in the irregularities of the coin 3 with good sensitivity. It is desirable that the frequency be such that it penetrates into the surface of the uneven pattern of the pin, does not penetrate to the center, and the effect of the demagnetizing field due to the eddy current appears remarkably. This frequency varies depending on the material of the coin to be discriminated.
  • the material of these coins is white copper, and when the material of the coin is white copper, the excitation frequency of excitation coil 1 is 70 K (Hz) to 90 K ( The frequency of Hz) is desirable, and in the experiments according to the present invention described later, the frequency was set to 90 K (Hz).
  • the selection of the frequency for exciting this exciting coil 1 is determined by the material of the target coin.For a coil with the same outer shape but a different thickness, the exciting frequency is changed sequentially. The voltage detected by the receiving coils 2a and 2b is measured, and the frequency at which the change in the detected voltage is large is determined by the change in the thickness of the coil. This frequency is used as the excitation frequency.
  • the excitation frequency is 70 K (H From experiments, it was found that the detected voltage varied the largest in the range of z) to 90 K (Hz) with the change in thickness. At frequencies higher or lower than these 70 K (Hz) to 90 K (Hz), the change in the detection voltage with respect to the change in the thickness of the coil becomes gradually smaller as the distance from the frequency band increases. In other words, in order to discriminate coins based on the difference in thickness, that is, the difference in the unevenness pattern on the surface of the coin, in the case of white copper coins, the excitation of 70 K (Hz) to 90 K (Hz) described above is used. The frequency is suitable.
  • the excitation frequency of about 7 K (Hz) to LOK (Hz) depends on the change in the thickness of the coin. Output voltage change is large. Therefore, in order to identify the coins made of brass by the uneven pattern on the surface, it is possible to efficiently identify the coins by using an excitation frequency of 7 K (Hz) to 10 K (Hz).
  • the excitation drive circuit 12 receives the square wave signal output from the oscillation circuit 11 and integrates the square wave by an integration circuit including a resistor R5, a capacitor C4, and a resistor R6.
  • the excitation coil 1 is converted to a waveform approximating a triangular wave, and the excitation coil 1 is driven by the approximate triangular wave signal.
  • the LC resonance circuit including the excitation coil 1 and the capacitor C1 resonates at the frequency, and both ends of the excitation coil 1 are driven with a sine waveform as a result.
  • the bridge circuit 13 having the above-described configuration constitutes an AC bridge circuit, and is constituted by an impedance comprising a reception coil 2a and a canister C2 connected in parallel.
  • Zl The impedance of the signal coil 2b and the capacitor C3 connected in parallel is Z2, and the impedance of the resistor R1 is Z3 and the impedance of the resistor R2.
  • Z 4 Letting be Z 4, the condition under which the AC bridge is in an equilibrium state is
  • ⁇ 1 ⁇ ⁇ 4 ⁇ 2 ⁇ ⁇ 3
  • the output of the bridge circuit 13 is connected to both the connection point between the receiving coils 2a and 2b and the connection point between the resistors R1 and R2. Since the signal appears between the points, the voltage across the receiving coil 2a is VI, the current flowing through the impedance Z1 is i1, and the voltage across the receiving coil 2b is Assuming that the current flowing through V 2 and impedance Z 2 is i 2, the voltage V def of the signal appearing between the two connection points is as follows (provided that the impedance Z of the resistor R 1 is equal to: 3 and the impedance Z 4 of the resistor R 2 are assumed to be equal).
  • V 1 Z 1i 1
  • V 2 Z 2 ⁇ i 2
  • V def V 1-V 2
  • V def Z 1i1-Z2i2
  • the resonance frequency of the LC resonance circuit by the reception coil 2a and the canopy capacitor C2, and the LC resonance circuit by the reception coil 2b and the capacitor C3 And the impedances Z1 and Z2 are substantially equal to each other so that the resonance frequency of the oscillation circuit 11 is substantially equal to the oscillation frequency output by the oscillation circuit 11.
  • the voltage of the signal that appears between the connection points is the current
  • the voltage signal is given by the difference between i 1 and i 2.
  • the differential amplifier 14 receives an AC voltage signal from the bridge circuit 13, amplifies the signal into a desired AC voltage signal, and outputs the signal to the detection circuit 15.
  • the detection circuit 15 receives the AC voltage signal output from the differential amplifier 14, performs detection rectification by the diode D 1, and outputs a resistor R 12 and a capacitor. The output is converted to a DC voltage signal corresponding to the output of the bridge circuit 13 by an integration circuit constituted by the capacitor C8.
  • the A / D converter 17 is realized by using, for example, a successive approximation conversion type A / D converter with a resolution of 8 bits built in the MPU 20.
  • the AD converter 17 receives the analog DC voltage signal output from the detection circuit 15, performs sampling at predetermined intervals, and corresponds to the output of the bridge circuit 13. The signal is converted to a digital signal and the digital signal sequence is output to the signal test circuit 18.
  • the signal inspection circuit 18 inputs the digital signal sequence on the amplitude axis output from the AD converter 17, temporarily stores the digital signal sequence in a memory such as a RAM, and stores the digital data in the RAM temporarily.
  • the statistical value of the signal sequence and the data sequence of the denomination previously stored and held in the memory 21 is obtained, and the statistical value is stored in the memory 21 in advance as a predetermined value. Compares with, checks whether it has the specified characteristics, and outputs the result of the check to output terminal 19.
  • N is the number of samplings
  • the variable Xi is the value of the digital signal sequence obtained by measuring the test coin with the sampling value
  • the variable Yi is the receiving value. It is a statistical value obtained by sampling the available denominations in advance using the apparatus of the present invention.
  • X a and Y a are the respective average values.
  • the sampling value Y i and the average value Y a of the acceptable denominations in the cross-product sum of deviation of the numerator in the above equation (1) can be obtained. Is calculated in advance with respect to the deviation value (Yi-Ya) of, and the sampling root Yi of the deviation between the sampling value Yi of the denominator of Equation (1) and its average value Ya. By storing the information in the memory 21, the subsequent processing speed can be remarkably increased.
  • the absolute value of the correlation coefficient r obtained by the equation (1) is in the range of 0 ⁇
  • a value close to 1 which is less than or equal to 1 is set in accordance with the target coin for which the predetermined value of the true / false determination is to be determined, and a correlation coefficient r larger than the set value is obtained. When it is obtained, it is determined to be a genuine coin.
  • FIGS. Figure 6 shows the characteristics of the representative coin.
  • Figure 7 is a comparison diagram showing the specifications of the representative coin.
  • the representative coin is US 5 CENT and NO.
  • the 5 CENTESIMOS coins in Nama are coins whose material (white copper), diameter and thickness are almost similar. Visually, the only difference between the two coins is that the surface design of the coins is different.
  • FIG. 6 is a characteristic diagram showing the result of measuring the coin by exciting the exciting coil 1 at an exciting frequency of 90 K (Hz) using the apparatus according to the present invention. It is.
  • the symbol 50 (indicated by the bold line) is for the US 5 CENT coin, and the symbol 51 is for the Panama 5 CENTESIMOS coin.
  • Fig. 6 It can be seen that the difference between the characteristics of the two cores appears in the first peak and the last peak. This is because the eddy current generated on the surface of the coin generates a demagnetizing field characterized by the unevenness of the pattern on the surface of the coin, thereby reducing the electromotive force generated in each of the two receiving coils. It is considered that a significant difference was detected. In the prior art, such a difference as described above could not be detected.
  • the coin inspection device 30 checks the coin 3 inserted from the coin inlet 31 by the natural fall, and the coin 30 is below the coin inlet 31. Drop it to the coin rail 4 provided at The coin 3 that has fallen into the coil rail 4 does not roll downstream through the coin inlet 31 through the coin passage 6 (Fig.lb). Fall. While the coil 3 moves in the coin passage 6, the outer diameter detection coil 32, the material detection coil 33, the excitation coil 1 for the uneven pattern detection coil 1 and the reception coil 2 Pass through a and 2 b. The device 30 checks the authenticity of the coin 3 while the coin 3 passes through each of the detection coils. If coin 3 is determined to be authentic as a result of the inspection, gate 3 4 is operated by driving distribution solenoid 35 based on the signal output to output terminal 19.
  • coin 3 is a genuine coin
  • coin 3 guided to the genuine passage continues to fall freely, and eventually falls to coin lane 36.
  • the dust 3 that has fallen into the coin tray 36 is sorted by denomination by well-known sorting means (not shown), and the discharge ports A, B, C, and D provided for each denomination are provided. Emitted from the corresponding outlet.
  • the outer diameter detection coil 32 and forest quality detection coil 33 A known technique can be used as the detection means.
  • step 101 a process of judging whether or not a coin has been injected into the device using the signal of the detection coil is executed. . If it is determined in step 101 that the coin has been input, the program proceeds to the AD conversion process of step 102. If it is determined in step 101 that the coin has not been input, the waiting process is looped so as to wait for the arrival of the coin.
  • step 101 If it is determined in step 101 that the coin has been input, the process proceeds to the AD conversion process of step 102.
  • the AD conversion process in step 102 when the coin arrives in the detection coil, the signal is received, and the reception coils 2a and 2b of the detection coil for detecting the uneven pattern are received. Sampling of the output signal of the detection circuit 15 which is a signal from the power source is started. The sampling result is temporarily stored in a memory such as the RAM of the MPU 20 ⁇ ⁇ , and the process proceeds to step 103.
  • the arithmetic processing in step 103 is performed by calculating the value of the digital signal sequence temporarily stored and held in the memory and the statistics of the acceptable coins previously stored in the memory 21. The value and are calculated by using the above equation (1) to obtain the correlation coefficient r. Proceed to 5 for truth judgment.
  • step 105 the true / false judgment is made by comparing the correlation coefficient obtained by the arithmetic processing in step 103 with a predetermined value of the acceptable coin stored in advance. And the correlation coefficient! : ⁇
  • the value is a predetermined value
  • the correlation coefficient r is smaller than the predetermined value
  • the coin to be tested is determined to be false
  • the false coin processing in step 104 is executed, and the process returns to the standby loop.
  • the tested coin is determined to be the true one in the truth determination processing in step 105, and the genuine processing in step 106 is performed. Shall be executed.
  • the genuine processing in step 106 executes processing for outputting a genuine signal, a denomination signal, and the like based on the determination result, and returns to the standby loop.
  • 9a and 9b show a configuration of a detector for detecting an uneven pattern according to the second embodiment of the present invention.
  • the difference from the first embodiment described above is that the line 5b connecting the center of the pole face 40a at the longitudinal end of the U-shaped core 40 of the exciting coil 1 is the receiving coil. It is orthogonal to the line 5a connecting the centers of the coils 2a and 2b, and the line 5b passes through the center C1 of the receiving coil 2a and the midpoint M of the center C2 of the receiving coil 2b. Thus, it is only the point where the excitation coil 1 and the reception coils 2a and 2b are provided. The operation and effect are the same as those of the first embodiment, and thus the description thereof is omitted.
  • FIGS. 10a and 10b are diagrams showing a configuration of a detector for detecting an uneven pattern according to the third embodiment of the present invention.
  • the line 5a connecting the centers of the receiving coils 2a and 2b is perpendicular to the coin rail 4 on which the coin 3 rolls and falls. The only difference is that they are shifted in the direction and pass through the central position of the target coin 3.
  • the receiving coils 2 a and 2 b are arranged at the center of the target coin 3, detection is performed based on the difference in the unevenness pattern at the center of the coin 3. Since the values differ, it is suitable for discriminating whether a coin has a hole in the center of the coin or not.
  • FIGS. 11A and 11B are diagrams showing a configuration of a detector for detecting an uneven pattern according to the fourth embodiment of the present invention.
  • the difference from the first embodiment described above is that the arrangement of the receiving coils is rotated by 90 degrees, and the line 5a connecting the centers of the receiving coils 2a and 2b is the core of the exciting coil 1. This point is orthogonal to the line 5 b connecting the centers of the magnetic pole faces, and intersects at the center of the exciting coil 1.
  • the receiving coils 2a and 2b are arranged at positions corresponding to the center of the target coin, the uneven pattern is changed at the center of the coin.
  • the fourth embodiment is suitable for the case where true or false is determined for a certain coin and a non-coin.
  • the position of the receiving coils 2a and 2b (the position of the exciting coil corresponding to the position of the receiving coil) is determined to be true or false. According to the difference in the concave and convex pattern on the surface of the target coin to be tested (if there is a difference in the concave and convex pattern due to the absence of a hole in the center, the uneven pattern is If there is a difference, etc.), it should be changed.
  • the present invention excites the exciting coil 1 at a frequency such that the electromagnetic field penetrates only on the surface of the coil and does not penetrate to the center, thereby forming an electromagnetic field, and a vortex generated near the surface of the coin. Since the effect of the demagnetizing field due to the current is measured, it is desirable that the surfaces of the receiving coils 2a and 2b facing the coin be closer to the surface of the coil.
  • the position of the reception walls 2a, 2b on the passage wall 7a that is, the position of the reception walls 2a, 2b in Fig. 1a
  • the receiving coils 2a and 2b are formed. You may make it form the state which made b substantially close to the coin surface.
  • the excitation coil 1 is shown as having a U-shape.
  • the excitation coil 1 may be formed in any other shape without departing from the gist of the present invention. Is also good.
  • a small and high-performance coin detection apparatus can be provided at low cost with respect to various coins.

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Abstract

L'invention concerne un procédé et un dispositif qui permettent de détecter une fausse pièce de monnaie en détectant une différence au niveau d'un motif irrégulier gravé à la surface de ladite pièce. On dispose une pièce excitatrice près d'une paroi latérale d'un passage de pièces ayant une inclinaison prédéterminée, de façon que les deux pôles magnétiques de la pièce excitatrice soient tournés vers ledit passage, puis on dispose près de la même paroi deux pièces réceptrices ayant des caractéristiques sensiblement identiques, de façon à produire un couplage électromagnétique avec la pièce excitatrice. On excite celle-ci à une fréquence prédéterminée, de façon à détecter l'influence que la pièce réceptrice exerce sur un champ diamagnétique par l'intermédiaire d'un courant de Foucault produit à la surface de la pièce. A ce niveau, un motif irrégulier différent génère un champ diamagnétique ayant une intensité différente, ce qui permet de détecter une fausse pièce. Le dispositif, de fabrication simple et peu coûteuse, est capable de faire la différence entre des pièces constituées sensiblement du même matériau, ayant sensiblement la même forme et la même épaisseur, sur la base d'une différence dans son motif de surface.
PCT/JP1999/000881 1998-02-26 1999-02-25 Procede et dispositif permettant de detecter une fausse piece de monnaie WO1999044176A1 (fr)

Priority Applications (5)

Application Number Priority Date Filing Date Title
CA002288297A CA2288297C (fr) 1998-02-26 1999-02-25 Procede et dispositif permettant de detecter une fausse piece de monnaie
KR1019997008409A KR100562857B1 (ko) 1998-02-26 1999-02-25 코인의 진안성을 판별하는 방법 및 장치
AU25494/99A AU729021B2 (en) 1998-02-26 1999-02-25 Method and apparatus for determining authenticity of coins
EP99905308A EP0978807A4 (fr) 1998-02-26 1999-02-25 Procede et dispositif permettant de detecter une fausse piece de monnaie
US09/403,824 US6325197B1 (en) 1999-02-25 1999-02-25 Method and device for checking coin for forgery

Applications Claiming Priority (2)

Application Number Priority Date Filing Date Title
JP10/60377 1998-02-26
JP06037798A JP3660496B2 (ja) 1998-02-26 1998-02-26 コインの真贋性を検査する方法及び装置

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WO1999044176A1 true WO1999044176A1 (fr) 1999-09-02

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EP (1) EP0978807A4 (fr)
JP (1) JP3660496B2 (fr)
KR (1) KR100562857B1 (fr)
AU (1) AU729021B2 (fr)
CA (1) CA2288297C (fr)
MY (1) MY123288A (fr)
WO (1) WO1999044176A1 (fr)

Cited By (1)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
GB2357883A (en) * 1999-10-06 2001-07-04 Nippon Conlux Kabushiki Kaisha Coin inspection method and device

Families Citing this family (6)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
JP3773689B2 (ja) * 1999-03-17 2006-05-10 株式会社日本コンラックス コイン検査方法及び装置
US6340082B1 (en) * 1999-10-22 2002-01-22 Japan Tobacco Inc. Coin discriminating apparatus
DE60233285D1 (de) * 2001-03-15 2009-09-24 Glory Kogyo Kk Münzverarbeitungsvorrichtung
WO2003091656A1 (fr) * 2002-04-26 2003-11-06 Azuma Systems Co., Ltd Procede de detection de la forme d'une piece, capteur d'identification de piece et dispositif d'identification de piece
DE102007046390B3 (de) 2007-09-20 2008-11-27 National Rejectors, Inc. Gmbh Verfahren zum Prüfen von Münzen
JP7443733B2 (ja) * 2019-11-28 2024-03-06 沖電気工業株式会社 硬貨認識装置、及び、当該硬貨認識装置を用いる硬貨取扱装置

Citations (6)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
US3870137A (en) 1972-02-23 1975-03-11 Little Inc A Method and apparatus for coin selection utilizing inductive sensors
JPS6180491A (ja) * 1984-09-28 1986-04-24 株式会社日本コンラックス 硬貨検査装置
JPH0589319A (ja) * 1991-09-26 1993-04-09 Tdk Corp コインセンサ
JPH06124380A (ja) * 1992-10-09 1994-05-06 Anritsu Corp 硬貨判別装置の硬貨センサ
JPH0844926A (ja) * 1994-07-28 1996-02-16 Nippon Conlux Co Ltd コイン検査方法およびその装置
JPH08212416A (ja) * 1995-02-03 1996-08-20 Anritsu Corp 硬貨判別装置

Family Cites Families (3)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
US4705154A (en) * 1985-05-17 1987-11-10 Matsushita Electric Industrial Co. Ltd. Coin selection apparatus
JP3384803B2 (ja) * 1991-09-28 2003-03-10 アンリツ株式会社 硬貨判別装置
US5630494A (en) * 1995-03-07 1997-05-20 Cummins-Allison Corp. Coin discrimination sensor and coin handling system

Patent Citations (6)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
US3870137A (en) 1972-02-23 1975-03-11 Little Inc A Method and apparatus for coin selection utilizing inductive sensors
JPS6180491A (ja) * 1984-09-28 1986-04-24 株式会社日本コンラックス 硬貨検査装置
JPH0589319A (ja) * 1991-09-26 1993-04-09 Tdk Corp コインセンサ
JPH06124380A (ja) * 1992-10-09 1994-05-06 Anritsu Corp 硬貨判別装置の硬貨センサ
JPH0844926A (ja) * 1994-07-28 1996-02-16 Nippon Conlux Co Ltd コイン検査方法およびその装置
JPH08212416A (ja) * 1995-02-03 1996-08-20 Anritsu Corp 硬貨判別装置

Non-Patent Citations (1)

* Cited by examiner, † Cited by third party
Title
See also references of EP0978807A4 *

Cited By (3)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
GB2357883A (en) * 1999-10-06 2001-07-04 Nippon Conlux Kabushiki Kaisha Coin inspection method and device
GB2357883B (en) * 1999-10-06 2002-04-17 Nippon Conlux Kabushiki Kaisha Coin inspection method and device
US6640955B1 (en) 1999-10-06 2003-11-04 Kabushiki Kaisha Nippon Conlux Coin inspection method and device

Also Published As

Publication number Publication date
AU729021B2 (en) 2001-01-25
JPH11250305A (ja) 1999-09-17
MY123288A (en) 2006-05-31
KR20000076308A (ko) 2000-12-26
EP0978807A1 (fr) 2000-02-09
CA2288297A1 (fr) 1999-09-02
JP3660496B2 (ja) 2005-06-15
KR100562857B1 (ko) 2006-03-24
EP0978807A4 (fr) 2002-03-06
AU2549499A (en) 1999-09-15
CA2288297C (fr) 2004-04-27

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