JP2002183793A - Coin identifying device - Google Patents

Abstract

PROBLEM TO BE SOLVED: To precisely identify coins by eliminating the influence of a temperature change. SOLUTION: The coin identifying device comprises a coin carrying path 13 for carrying a coin 15 to be detected along a guide 14 while being supported on a sliding plane 13a, first magnetic detecting sensors la, 2a arranged in the coin carrying path 13, and identifying means for identifying the coin 15 in accordance with output signals from the detecting sensors 1a, 2a, wherein second magnetic detecting sensors 1b, 2b between which a comparison sample 17 having a conductivity as a reference value is arranged are provided for detecting the conductivity of the comparison sample 17 so that the coin 15 is identified by comparing the conductivity of the comparison sample 17 with the conductivity of the coin 15 to be carried.

Description

DETAILED DESCRIPTION OF THE INVENTION

[0001]

The present invention relates to a coin identification device. More specifically, the present invention relates to an improvement in the structure of an apparatus for identifying the authenticity of a coin such as a 500 yen coin.

[0002]

2. Description of the Related Art Generally, coin identification devices in vending machines, ticket vending machines, centralized processing machines, and the like detect the material, thickness, and diameter of each coin as a difference in eddy current loss using a magnetic sensor, and determine the type of coin or true coin. I try to identify fake.

[0003] As a shape of a coin discriminating apparatus, a coin is generally sandwiched between separated cores. For example, the coin identification device shown in FIG.
1, the coin 102 is sandwiched, and a magnetic flux is generated by the exciting coil 103 to excite almost the entire surface of the coin 102. And
The eddy current loss is detected by the detection coil 104, and the magnitude and phase shift of the output at this time are observed.

[0004] In this case, the authenticity and type of the coin 102 are determined by comparing the output of the detection coil 104 with data stored in advance as a reference for the authenticity and type of the coin 102.

[0005]

However, the magnetic sensor used in this comparison has the following problems.

First, when the temperature changes in the environment, or when the coin 102 is damaged or the coin 102 jumps during transportation, the magnetic permeability of the magnetic material forming the magnetic path changes. However, there is a problem that the output of the magnetic sensor changes. In such a case, a large margin is required in consideration of output fluctuation due to temperature characteristics and the like, so that a high detection sensitivity cannot be ensured, and coins 1 having similar electric conductivity are not obtained.
02 may not be able to set a threshold value.

Secondly, the detection sensitivity can be greatly improved by adopting a differential structure. However, since the comparison is made between the magnetic permeability of the space and the eddy current loss generated in the metal, there is only a slight difference in conductivity. There is a problem that it is difficult to determine the metal. Therefore, even if it is desired to increase the gain by increasing the amplifier gain, the absolute output is clipped. In this case, the difference cannot be enlarged, and the signal SN ratio cannot be obtained.

Accordingly, an object of the present invention is to provide a coin discriminating apparatus capable of accurately discriminating coins by eliminating the influence of a temperature change.

[0009]

In order to achieve the above object, according to the present invention, a coin conveying path for conveying a coin to be detected along a guide while supporting the coin on a sliding surface;
A first magnetic detection sensor disposed on the coin transport path;
Identification means for identifying a coin based on an output signal from the detection sensor, a second magnetic type detection sensor for arranging a comparison sample having a conductivity as a reference value and detecting the conductivity of the comparison sample; A coin discriminating apparatus for discriminating coins by comparing the conductivity of a comparison sample with the conductivity of a conveyed coin, wherein the first magnetic detection sensor and the second magnetic detection sensor are U-shaped, A projection is formed such that two free ends are opposed to each other, and an exciting coil and a detection coil are wound around these projections, respectively. A coin is conveyed between the two projections of the first magnetic type detection sensor, and a comparative sample is formed. Is disposed between the two protrusions of the second magnetic type detection sensor, and the comparative sample is disposed so as to be substantially symmetric with the coin with respect to the first magnetic type detection sensor and the second magnetic type detection sensor. Things.

According to this coin discriminating apparatus, a reference value for comparison can be obtained from the comparison sample at any time, and the reference value data and coin detection data can be compared one-to-one. Therefore, even if the environmental temperature of the coin identification device changes,
The comparative sample is affected by the same temperature change as the coin, and the output fluctuations of the coin and the comparative sample are offset in the comparison between the coin and the comparative sample. Therefore, it is not necessary to set a wide margin in anticipation of output fluctuation due to temperature characteristics, and it is possible to secure high detection sensitivity.

This coin discriminating device has a core-shaped first magnetic detection sensor having a projection, and an excitation coil is disposed at the tip of the coin-type identification sensor to narrow the generated magnetic flux into a spot. As a result, the concentrated magnetic flux increases in density and is effective in discriminating coins, so that the coin discriminating device improves the current efficiency and increases sensitivity, and extracts data specialized in materials and the like to accurately discriminate coins. Can be.

In addition, since it is a core shape that holds a coin,
The output signal voltage increases and the identification resolution increases. For this reason, the absolute value of the change voltage increases, and the change voltage value increases even with a minute change in the material, so that a threshold value for practical use can be set.

Further, since the two pairs of detection coils are arranged so as to be sandwiched in the vertical direction of the coin and wound in the same phase,
Even if the position of the coin fluctuates up and down, the output of the series coil does not change and a constant output can be obtained.

According to a second aspect of the present invention, there is provided a coin transport path for transporting a coin to be detected along a guide while supporting the coin to be detected on a sliding surface, and a first magnetic detection sensor disposed on the coin transport path. Identification means for identifying coins based on an output signal from the detection sensor, a comparative sample having a conductivity as a reference value is arranged, and a second sensor for detecting the conductivity of the comparative sample is provided.
A coin discriminating device that has a magnetic detection sensor and compares the conductivity of a comparison sample with the conductivity of a conveyed coin to identify a coin, comprising: a first magnetic detection sensor and a second magnetic detection sensor Is a U-shape. An excitation coil and a detection coil are wound around two free ends, respectively, and a coin is transported between the free ends of the first magnetic type detection sensor, and a comparative sample is freed from the second magnetic type detection sensor. The comparative sample is disposed between the ends, and the comparative sample is disposed so as to be substantially symmetric with the coin with respect to the first magnetic detection sensor and the second magnetic detection sensor.

According to this coin discriminating apparatus, a reference value for comparison can be obtained as needed from the comparison sample, and the reference value data and coin detection data can be compared one-to-one. Therefore, even if the environmental temperature of the coin identification device changes,
The comparative sample is affected by the same temperature change as the coin, and the output fluctuations of the coin and the comparative sample are offset in the comparison between the coin and the comparative sample. Therefore, it is not necessary to set a wide margin in anticipation of output fluctuation due to temperature characteristics, and it is possible to secure high detection sensitivity.

Further, a first aspect of the coin identification device according to the first aspect of the present invention.
The magnetic detection sensor and the second magnetic detection sensor may be detection sensors that detect at least one of the material and thickness of the coin and the comparative sample.
This coin discriminating device has a first magnetic detection sensor having a protruding portion, and the generated magnetic flux is narrowed down to a spot by arranging an exciting coil at the tip thereof. Alternatively, data specialized in thickness can be taken out, and coins can be identified with high accuracy.

Further, a first aspect of the coin identification device according to the second aspect of the present invention.
The magnetic detection sensor and the second magnetic detection sensor may be detection sensors for detecting the diameters of coins and comparative samples. This coin identification device has a core shape and a coil position for generating a parallel magnetic flux effective for diameter identification, and forms a magnetic field with a uniform and uniform magnetic flux density in the core gap. The converted data can be taken out and coins can be identified with high accuracy.

Further, according to the coin discriminating apparatus according to the fifth aspect, the comparative sample is a specific coin of one coin type that requires detailed discrimination, the influence of the temperature change is eliminated, and the coin to be detected is detected. And the like can be accurately detected as to whether they are genuine coins (one coin of a specific coin).

[0019]

DETAILED DESCRIPTION OF THE PREFERRED EMBODIMENTS The configuration of the present invention will be described below in detail based on an example of an embodiment shown in the drawings.

1 to 3 show a coin discriminating apparatus according to the present invention. The coin identification device places the coin 15 to be detected on the sliding surface 13.
a coin transport path 13 for transporting along the guide 14 while supporting the first magnetic type detection sensor 1a (2a) disposed on the coin transport path 13 and the first magnetic type detection sensor 1a (2a) ), A second magnetic type detection sensor for locating a comparison sample 17 having a conductivity as a reference value and detecting the conductivity of the comparison sample 17. 1b (2b),
The coin 15 is identified by comparing the conductivity of the comparative sample 17 with the conductivity of the coin 15 being conveyed.

Here, the coin discriminating apparatus of the present embodiment detects at least one of the data relating to the material, thickness, and diameter of the coin 15 and uses the discrimination material to detect coins with high accuracy. In the following, first, coin 15
The material / thickness detection sensor 1 for detecting the material / thickness of the coin 15 to obtain the identification data will be described, and then the diameter detection sensor 2 for detecting the diameter of the coin 15 and obtaining the identification data will be described.

First, the first magnetic type detection sensor (the side indicated by reference numeral 1a) forming the upper half of the material / thickness detection sensor 1 shown on the right side of FIG. 1 will be described. The first magnetic detection sensor 1a has a U-shape, and has protrusions 16 (indicated by reference numeral 16a in FIG. 1) formed so that two free ends thereof are opposed to each other. And the detection coil 5a, and detects the eddy current and conductivity when the coin 15 is conveyed between the two protrusions 16a to detect the material and the like of the coin 15. A coin transport path 13 is provided between the two free ends. Here, it is preferable that the U-shaped first magnetic detection sensor 1a has a symmetric shape with a smaller fluctuation width.

As shown in FIG. 1, the protrusion 16a is provided so as to protrude inward from the free end side of the U-shaped first magnetic detection sensor 1a, and a magnetic flux flows from one protrusion 16a to the other protrusion. It is made easy to fly to the part 16a. Further, the protrusion 16a is formed in a spot (dot) shape so as to form a thin magnetic flux effective for discriminating the coin 15, and the magnetic flux emitted from the end face is concentrated to increase the density.
The current efficiency has been improved to achieve higher sensitivity. Therefore, the protruding portion 16a facing from one protruding portion 16a
When the coin 15 crosses the magnetic flux that flies through the gap up to the gap, a change in behavior related to a change in the material or thickness of the coin 15 becomes large, and data specialized for the material or the like can be extracted. In this case, it is effective to make the diameter of the protrusion 16a smaller than the detection target (specifically, a 500 yen coin).

Each of the projections 16a has an exciting coil 4
(The side indicated by reference numeral 4a in FIG. 1). The position where the exciting coil 4a is wound is not limited to the projection 16a, but may be another location of the core 6 (the side indicated by reference numeral 6a in FIG. 1). When provided, the magnetic flux passing through the protrusion 16a can be easily controlled. In particular, when the projection 16a is formed into a spot shape as in the present embodiment, magnetic flux leakage in portions other than the projection 16a can be reduced and the magnetic flux can be concentrated, so that magnetic flux control by the excitation coil 4a can be easily performed.

Further, a detection coil 5 (the side indicated by reference numeral 5a in FIG. 1) is wound around the exciting coil 4a. The detection coil 5a detects a thin magnetic flux passing through the spot-shaped projection 16a, and can detect a slight change in the magnetic flux, thereby enabling highly accurate coin detection.

In this embodiment, as shown in FIG. 1, a second magnetic sensor 1b having the same shape as the first magnetic sensor 1a is provided, and the two sensors 1a and 1b are formed as a pair. Integrally, one of the first magnetic detection sensors 1a is a detection magnetic sensor for detecting the coin 15, and the other second magnetic detection sensor 1b is a comparison sample magnetic sensor.
The coin 15 is detected by comparing the output of the second magnetic detection sensor 1b, which is a reference value, with the output of the first magnetic detection sensor 1a. In this case, a differential sensor is configured that makes the difference between the output of the first magnetic detection sensor 1a and the output of the second magnetic detection sensor 1b the final output, so that more accurate detection is possible.

Further, in the present embodiment having such an integrated sensor, the exciting coil 4 and the detecting coil 5 are
The same is provided not only for the first magnetic detection sensor 1a but also for the second magnetic detection sensor 1b. In the figure, the excitation coil and the detection coil on the side of the second magnetic type detection sensor 1b are indicated by reference numerals 4b or 5b. In the present embodiment, the detection coil 5 is wound around the outside of the excitation coil 4. However, the detection coil 5 may be wound inside, and the excitation coil 4 may be wound around the outside.

Here, the shapes of the first magnetic detection sensor 1a and the second magnetic detection sensor 1b will be described. As described above, in the present embodiment, each of the cores 6a and 6b has a U-shape, and is formed so that the magnetic flux passes through the protrusion 16 and circulates. In this case, the magnetic detection sensor 1a (1
On the back side opposite to the free end side of b), the connecting portion 7 indicated by reference numeral 7a (7b) is a magnetic detection sensor 1a.
The upper side and the lower side of (1b) are connected to form a magnetic path through which the magnetic flux runs, and the resistance to the magnetic flux is reduced as compared with the magnetic sensor whose back side is not connected.
Through it. Therefore, the current efficiency of each material / thickness detection sensor 1 is dramatically increased, and the identification resolution is improved.

As shown in FIG. 1, the cores 6a and 6b of the first magnetic type detecting sensor 1a and the second magnetic type detecting sensor 1b are used.
The E-shaped integrated shape sensor that shares the same foot is preferable because a highly accurate differential output can be obtained. That is, the first
When the coin 15 crosses the magnetic flux of the magnetic detection sensor 1a, the difference increases because the detection value of the first magnetic detection sensor 1a increases and the detection value of the second magnetic detection sensor 1b increases. The sensitivity can be improved and accurate data can be obtained.

As described above, the material / thickness detecting sensor 1 has a core shape having the projections 16, and the excitation coil 4 is disposed at the tip of the sensor so that the generated magnetic flux is spot-shaped. A concentrated magnetic field can be formed between the sixteen. Thereby, the material / thickness detection sensor 1
Reduces the magnetic flux effective for discrimination and all the generated magnetic flux to coin 15
By measuring the amount of change in the magnetic flux while transmitting the laser beam, it is possible to identify the material or thickness.

Next, the diameter detecting sensor 2 will be described.

First magnetic detection sensor 2 of diameter detection sensor 2
a has a U-shape, and a coin transport path 13 is provided between two free ends.

In this embodiment, as shown in FIG. 1, similarly to the above-described material / thickness detection sensor 1, a second magnetic detection sensor 2b having the same shape as the first magnetic detection sensor 2a is provided. E in which 2a and 2b are integrated as a pair
And a first magnetic detection sensor 2a
Is a detection magnetic sensor for detecting the coin 15, the other second magnetic type detection sensor 2b is a comparative sample magnetic sensor, and the output of the second magnetic type detection sensor 2b, which is a reference value, and the first magnetic type detection sensor 2a The coin 15 is detected by comparing with the output. In this case, the first magnetic detection sensor 2a
The operation type sensor is configured so that the difference between the output of the second magnetic type detection sensor 2b and the output of the second magnetic type detection sensor 2b is the final output, and more accurate detection is possible.

In order to form a parallel magnetic field suitable for detecting the diameter of the coin 15, the diameter detecting sensor 2 winds the exciting coil 40 and the detecting coil 50 around the connecting portion 70 on the side opposite to the free end side. The coin 15 is sandwiched between two free ends of the character shape. In the present embodiment, as shown in FIG. 1, the excitation coil 40 is wound near the joint 70 of the common foot of the cores 60a and 60b of the first magnetic detection sensor 2a and the second magnetic detection sensor 2b. On the other hand, the detection coils 50a and 50b
Each magnetic type detection sensor 2 is formed so as to form a reverse magnetic flux.
a and 2b around the connecting portions 70a and 70b. Thereby, a substantially parallel magnetic field is formed between the gaps of the core 60.

When the parallel magnetic field is formed in this way, it becomes possible to take out the identification data of the coin 15 specialized in diameter and to identify it. That is, when the coin 15 is placed in the gap portion of the core 60 or passed through the gap portion, the magnetic flux changes well in accordance with the size of the diameter, and an output related to the diameter can be obtained. In addition, the diameter detection sensor 2 is shown in FIG.
It is preferable to use a differential type in which the first magnetic detection sensor 2a and the second magnetic detection sensor 2b are paired as shown in FIG.

As described above, according to the diameter detection sensor 2, a core shape and a coil position for generating a magnetic flux in parallel can be realized, and a magnetic field for obtaining a parallel and uniform magnetic flux density in the gap of the core 60 can be formed. The discrimination resolution for the diameter is improved. Further, similarly to the material / thickness detection sensor 1, a differential sensor is configured to improve the temperature characteristics and the resolution, so that the detection can be performed with high accuracy.

Next, a description will be given of a composite detection sensor for obtaining any or all of the data on the material, thickness, and diameter of the coin 15.

As shown in FIG. 1, the detection sensor according to the present embodiment integrates the material / thickness detection sensor 1 for identifying the material / thickness shown in the above-described embodiment and the diameter detection sensor 2 for identifying the diameter. , Data on the material, thickness and diameter of the coin 15 can be detected. This integrated sensor is a material / thickness detection sensor 1 (1a, 1a) shown on the right side in the figure.
b) and the diameter detection sensor 2 (2a, 2b) shown on the left side in the figure are integrally molded with the mold 12 in a state where they face each other such that the gaps face each other.

Although not particularly shown, the mold 12 has a shield for preventing interference between the two detection sensors 1 and 2.
The mold 12 is provided with a coin transport path 13 extending over the gap between the two detection sensors 1 and 2 so that the material, thickness and diameter can be identified by passing the coin 15 once. In the coin transport path 13, the outer edge 15 a of the coin 15 is always the guide 1 on the material / thickness detection sensor 1 side of the coin transport path 13.
4 so that the diameter of the coin 15 is detected by the diameter detection sensor 2. Reference numeral 18 denotes a transport belt that transports the coins 15.

Here, in the present embodiment, as shown in FIG. 1, a comparative sample 17 having a conductivity as a reference value for coin identification and being affected by a situation change (for example, an environmental temperature change) like the coin 15. Is disposed on the second magnetic detection sensor 1b, 2b side. The comparative sample 17 is, for example, a coin of the same kind as the coin 15. In this case, among the actual coins, it is preferable to select a coin located approximately at the middle of the distribution of the material (or thickness, diameter) data, and to use the average data as the comparison reference value. The comparative sample 17 is arranged near the material / thickness detection sensor 1 and fixed by the mold 12, similarly to the coin 15 contacting the guide 14.

In this embodiment, the E-shaped detection sensor 1
The first magnetic detection sensor 1a (2a) and the second magnetic detection sensor 1b such that the shape of (and 2) is vertically symmetric.
(2b) and a comparative sample 17
The space 20 in which the coins are to be set has the same shape and size as the coin transport path 13 and is provided at a position symmetrical to the coin transport path 13. In this case, the comparative sample 17 includes the first magnetic detection sensor 1a (2a) and the second magnetic detection sensor 1a.
It is preferable to be arranged on the ceiling side of the space 20 so as to be substantially symmetrical with the coin 15 with respect to b (2b).
In such a case, the comparison sample 17 and the coin 15 are arranged symmetrically, so that the accuracy of comparison between the two is improved, and the ability to discriminate coins can be improved. In the present embodiment, the comparative sample 17 is fixed at a symmetric position of the coin 15 by providing a spacer 21 as shown in the figure. As the spacer, a material made of a nonmetallic or nonmagnetic material such as ceramic or resin is used. FIG. 2 shows a coin identification device without a spacer.

Next, the coin transport path 13 will be described. The coin conveying path 13 has, for example, a shape that is bent in a substantially “C” shape as shown in FIG.
Is transported along the guide 14 while being supported on the sliding surface 13a. The coin transport path 13 has a bottom sliding plate 13c that supports a coin 15 to be detected, which is sent from the transport entrance 13b on the right end in the figure toward the left side in the figure, on the sliding surface 13a. And the bottom sliding plate 13c
The transport belt 18 is disposed directly above the transport belt 18. In addition, 1
Small-diameter coins such as yen, 50 yen, 5 yen, 100 yen, and 10 yen are indicated by reference numeral 15 '.

A guide 14 is provided on one side of the bottom slide plate 13c along the edge of the bottom slide plate 13c.
The coin control lever 19 for pressing the coin 15 against the guide 14 is rotatably supported by a pin 19a at a bent portion of the coin transport path 13. The coin restricting lever 19 is used to move the coin 15 while being supported on the bottom slide plate 13c.
Is pushed against the guide 14 by urging means such as a spring (not shown), and the coin 15 sent out from the portion where the coin regulating lever 19 is disposed toward the downstream side in the transport direction is guided by the guide 14. Outer peripheral edge 1
5a are sequentially conveyed while maintaining the contact state. The coin transport path 13 is not limited to the one using the coin regulating lever 19 shown in FIG. 3. For example, the coin transport path 13 is moved so that the coin 15 moves along the guide path along the guide 14 by its own weight. It may be configured.

Although not shown, the identification means of the coin identification device identifies the coin 15 to be detected based on the outputs of the material / thickness detection sensor 1 and the diameter detection sensor 2, and includes a data memory relating to the material and the like. It is composed of a CPU and the like. The discriminating means discriminates the coin 15 using the output signals of the detection sensors 1 and 2 converted into digital data by, for example, an A / D converter (not shown).

As described above, according to the coin discriminating apparatus of the present embodiment in which the sensors for independently detecting the material, thickness and diameter are integrated, the material and thickness detection sensor 1 specializes in the material and thickness of the coin 15. Thus, the data specialized for the diameter of the coin 15 can be obtained by the diameter detection sensor 2.
Therefore, the target coin 15 can be identified with high accuracy.

Further, in the coin discriminating apparatus of the present embodiment in which the reference value for comparison is obtained from the comparative sample 17 as needed, for example, when the environmental temperature changes, the comparative sample 17 similarly to the coin 15 has a temperature change. Therefore, the output fluctuations of the coin 15 and the comparative sample 17 can be offset in the comparison. Therefore, it is not necessary to set a wide margin in anticipation of output fluctuation due to temperature characteristics, and it is possible to secure high detection sensitivity.

In the material / thickness detecting sensor 1,
Since the pair of detection coils 5 are arranged so as to be sandwiched in the vertical direction of the coin 15 and wound in the same phase, the output of the detection coils 5 in series does not change even when the coin 15 moves up and down. Can be obtained. Further, in this case, by shifting the coin 15 to one side and running, the material and the thickness can be identified at the same time.

Further, the first magnetic detection sensor 1a (2
a) and the second magnetic detection sensor 1b (2b) are U-shaped, and the upper and lower cores 6a (60a) and 6b (60b) are connected by connecting portions 7a (70a) and 7b (70b). Therefore, all the escaping magnetic flux can be drawn and passed through the conductor (core). Therefore, the magnetic flux resistance is reduced, the current efficiency is dramatically improved, and the identification resolution is easily improved. It is also strong against disturbance factors (for example, approach of metal).

The above embodiment is an example of a preferred embodiment of the present invention, but the present invention is not limited thereto, and various modifications can be made without departing from the gist of the present invention.

For example, in the present embodiment, the material / thickness detection sensor 1 and the diameter detection sensor 2 are arranged in an E-shape, as shown in FIG. 1, but may be arranged as shown in FIG. The coin discriminating apparatus shown in FIG. 4 has a material and a magnetic type detection sensor 1a, 1b integrated on the side opposite to the gap.
The thickness detection sensor 1 and the magnetic detection sensors 2a, 2
diameter detection sensor 2 in which b is integrated on the side opposite to the gap
And a coin transport path 13 between the detection sensors 1 and 2 and a comparative sample 17 for material / thickness discrimination on the opposite side (that is, outside in the figure) to the coin transport path 13. A comparative sample 17 ′ for diameter discrimination. Therefore, the coin identification device can simultaneously detect the material / thickness data and the diameter data for the coin 15 passing through the coin transport path 13. Further, according to this coin identification device, the material / thickness detection sensor 1 and the diameter detection sensor 2
Different comparative samples 17 and 17 ′ suitable for material / thickness detection and diameter detection can be provided.

In the present embodiment, the material / thickness detection sensor 1 and the diameter detection sensor 2 are arranged to face each other.
These need not always face each other. For example, although not particularly shown, one of the two detection sensors 1 and 2 is
Even if the coins are arranged in a displaced direction, the data on the material, thickness, and diameter are output by the two detection sensors 1 while the coin 15 passes.
2 can be obtained.

In this embodiment, a coin discriminating apparatus suitable for discriminating 500-yen coins has been described.
The coin is not limited to the 00 yen coin, but may be a coin other than a 500 won coin, or a coin or token used in a specific facility or the like. For example, when a 500 won coin is set as the comparative sample 17, it can be accurately determined whether or not the target is a 500 won coin.

[0053]

DETAILED DESCRIPTION OF THE PREFERRED EMBODIMENTS A specific example of the judgment processing in the coin identification device will be described below.

First, a peak value V1 is obtained from output waveforms of the detection sensors 1 and 2 as shown in FIG. Next, V1 is multiplied by a correction value according to the sensor temperature measured separately. For example, if the sensor temperature is 0 degrees, the value of the diameter detection sensor 2 is:
V1 × 0.98 is obtained using the correction value shown in FIG. Subsequently, the obtained value is compared with a standard value of genuine coins (genuine coins) that have been measured in advance, and the coins having the same values of the detection sensors 1 and 2 are the finally determined denominations.

Here, a case where a 500-yen coin is used as a comparative sample (denoted as "standard sample" in the figure) 17 will be described. When a 500-yen coin as a detection target comes, the output of the material / thickness detection sensor 1 and the diameter detection sensor 2 should be almost 0 because the material, thickness, and diameter of the coin 15 match the comparative sample 17. is there. Also, for other coins 15 'such as a 10-yen coin and a 100-yen coin,
Since any one of the material, thickness, and diameter is different from the 500 yen coin, it takes a value as shown in FIG.

Next, a circuit example of the material / thickness detecting sensor 1 capable of simultaneously detecting the material and thickness of a 500 yen coin will be described.
For example, in the circuit shown in FIG. 8, two sine waves f2 (for material detection) and f3 (for thickness detection) are combined and applied to the excitation coil 4. Since the detection coil 5 includes these two frequency components, f2 and f2 are detected using a filter.
3 is separated, each is detected and smoothed, and the differential material output is output.
Obtain differential thickness outputs individually. Reference numeral 8 denotes an AC power supply,
9 denotes a differential amplifier, 10 denotes a detector, 11 denotes a low-pass filter (LPF), and 11 ′ denotes a high-pass filter (HPF).

In the circuit shown in FIG. 9, the excitation coil 4 of the material / thickness detection sensor 1 has f2 (for material detection) and f3
Two sine waves (for thickness detection) are switched and applied in time division. The output of the detection coil 5 is differentially amplified and detected.
A sensor output is obtained by smoothing. F2 for the exciting coil 4
Is applied, a differential material output is obtained, and when f3 is applied to the exciting coil 4, a differential thickness output is obtained.

Further, in the circuit shown in FIG. 10, a sine wave of f2 (for material detection) is applied to one excitation coil 4 of the material / thickness detection sensor 1 and a sine wave of f3 (for thickness detection) is applied to the other excitation coil 4. Waves are each applied. Detection coil 5
Since these two frequency components are included, f2 and f3 are separated using a filter, and detection and smoothing are performed on each of them to separately obtain a differential material output and a differential thickness output.

[0059]

As is apparent from the above description, according to the coin discriminating apparatus of the present invention, a reference value for comparison is obtained from the comparison sample at any time, and the reference value data and the coin detection data are used on a one-to-one basis. Can be compared. Therefore, even if a change occurs in the environmental temperature of the coin discriminating apparatus, the comparative sample is affected by the same temperature change as the coin, and the output fluctuation of the coin and the comparative sample can be offset in the comparison. it can. Therefore, it is not necessary to set a wide margin in anticipation of output fluctuation due to temperature characteristics, and it is possible to secure high detection sensitivity.

Further, this coin discriminating apparatus has a core-shaped first magnetic detection sensor having a projection, and by arranging an exciting coil at the tip thereof, the generated magnetic flux is focused in a spot shape. Since the magnetic flux is increased in density, which is effective for discriminating coins, the coin discriminating apparatus has improved current efficiency and high sensitivity, and can extract data specialized for a material or the like to accurately discriminate coins.

In addition, since the coin is sandwiched between cores,
The output signal voltage increases and the identification resolution increases. For this reason, the absolute value of the change voltage increases, and the change voltage value increases even with a minute change in the material, so that a threshold value for practical use can be set.

Since the two pairs of detection coils are arranged so as to be sandwiched in the vertical direction of the coin and wound in the same phase,
Even if the position of the coin fluctuates up and down, the output of the series coil does not change and a constant output can be obtained.

Further, according to the coin discriminating apparatus of the present invention, a reference value for comparison can be obtained from the comparison sample as needed, and the reference value data and coin detection data can be compared one-to-one. Therefore, even if a change occurs in the environmental temperature of the coin discriminating apparatus, the comparative sample is affected by the same temperature change as the coin, and the output fluctuation of the coin and the comparative sample can be offset in the comparison. it can. For this reason,
It is not necessary to set a wide margin in anticipation of output fluctuation due to temperature characteristics, and it is possible to ensure high detection sensitivity.

According to the coin discriminating apparatus of the third aspect, the first magnetic type detecting sensor and the second magnetic type detecting sensor are detection sensors for detecting at least one of the material and thickness of the coin and the comparative sample. This makes it possible to obtain one or both of the data relating to the material and the data relating to the thickness and accurately identify the coin.

According to the coin discriminating apparatus of the present invention, the first magnetic type detection sensor and the second magnetic type detection sensor are detection sensors for detecting the diameters of coins and comparative samples. It is possible to extract coin-specific data and accurately identify coins.

Further, according to the coin discriminating apparatus of the fifth aspect, the influence of the temperature change is eliminated, and it is accurately detected whether or not the coin to be detected is a genuine coin (specific coin 1 denomination). can do.

[Brief description of the drawings]

FIG. 1 is a longitudinal sectional view of a coin discriminating apparatus showing one embodiment of the present invention.

FIG. 2 is a longitudinal sectional view of a coin discriminating apparatus in which a spacer is not provided in an installation space for a comparative sample.

FIG. 3 is a schematic diagram illustrating an example of a coin transport path provided in the coin identification device, in which (A) is a plan view and (B) is a side view.

FIG. 4 is a longitudinal sectional view showing another embodiment of the coin identification device of the present invention.

FIG. 5 is a graph showing an example of a differential output waveform by a detection sensor.

FIG. 6 is a table showing an example of output values when various coins are detected.

FIG. 7 is a table showing an example of an output correction value according to a sensor temperature when a comparative sample is a 500 yen coin.

FIG. 8 is a circuit diagram showing a circuit example of a material / thickness detection sensor of a 500 yen coin.

FIG. 9 is a circuit diagram showing another circuit example of a material / thickness detection sensor of a 500-yen coin.

FIG. 10 is a circuit diagram showing another circuit example of the material / thickness detection sensor of a 500-yen coin.

FIG. 11 is a longitudinal sectional view showing an example of a conventional coin identification device.

[Description of Signs] 1 Material / thickness detection sensor 1a First magnetic type detection sensor 1b (on the material / thickness detection sensor side) Second magnetic type detection sensor 2 (on the material / thickness detection sensor side) 2 Diameter detection sensor 2a (diameter) First magnetic detection sensor 2b (on the detection sensor side) Second magnetic detection sensor 4b (on the diameter detection sensor side) 4 Exciting coil 5 Detection coil 13 Coin transport path 13a Sliding surface 14 Guide 15 Coin 16 Projection 17 Comparative sample

 ──────────────────────────────────────────────────続 き Continuing on the front page (72) Inventor Shogo Momose 10801, Haramura, Suwa-gun, Nagano 2 In the Suwa Minami Plant of Sankyo Seiki Seisakusho Co., Ltd. (72) Inventor Junichi Nakajo 10801, Hara-mura, Suwa-gun, Nagano 2 (72) Inventor: Tomoyuki Sasaki 1-3-1, Shimoteno, Himeji-shi, Hyogo Prefecture Inside Glory Industry Co., Ltd. (72) Inventor: Naoki Tomigaki Shimoteno, Himeji-shi, Hyogo Prefecture 1-3-1 Glory Industries Co., Ltd. F-term (reference) 3E002 AA14 BC02 CA06 EA05

Claims (5)

[Claims] 1. A coin transport path for transporting a coin to be detected along a guide while supporting the coin to be detected on a sliding surface, a first magnetic detection sensor disposed on the coin transport path, and a Identification means for identifying the coin based on an output signal, a second magnetic detection sensor for arranging a comparative sample having a conductivity as a reference value and detecting the conductivity of the comparative sample, A coin discriminating device that identifies the coin by comparing the conductivity of the coin and the conductivity of the conveyed coin, wherein the first magnetic detection sensor and the second magnetic detection sensor are U-shaped, Protrusions are formed such that two free ends face each other, and an exciting coil and a detection coil are wound around these protrudes, respectively. The coin is conveyed between the two protrudes of the first magnetic detection sensor. And the comparative sample is the second magnetic The comparative sample is arranged between the two protrusions of the mold detection sensor, and the comparative sample is arranged to be substantially symmetric with the coin with respect to the first magnetic detection sensor and the second magnetic detection sensor. A coin identification device characterized by the above-mentioned. 2. A coin transport path for transporting a coin to be detected along a guide while supporting the coin to be detected on a sliding surface, a first magnetic detection sensor disposed on the coin transport path, and a signal from the detection sensor. Identification means for identifying the coin based on an output signal, a second magnetic detection sensor for arranging a comparative sample having a conductivity as a reference value and detecting the conductivity of the comparative sample, A coin discriminating device that identifies the coin by comparing the conductivity of the coin and the conductivity of the conveyed coin, wherein the first magnetic detection sensor and the second magnetic detection sensor are U-shaped, An excitation coil and a detection coil are wound around two free ends, respectively. The coin is conveyed between the free ends of the first magnetic detection sensor, and the comparative sample is transferred between the free ends of the second magnetic detection sensor. Along with the above comparison A coin discriminating apparatus, wherein a sample is disposed so as to be substantially symmetric with respect to the coin with respect to the first magnetic detection sensor and the second magnetic detection sensor. 3. The first magnetic sensor and the second magnetic sensor.
The coin identification device according to claim 1, wherein the magnetic detection sensor is a detection sensor that detects at least one of a material and a thickness of the coin and the comparative sample. 4. The first magnetic detection sensor and the second magnetic sensor.
The coin identification device according to claim 2, wherein the magnetic detection sensor is a detection sensor that detects the diameter of the coin and the comparative sample. 5. The coin discriminating apparatus according to claim 1, wherein the comparison sample is a denomination of a specific coin requiring detailed discrimination.