JPH0797426B2 - Coin inspection method in coin sorter - Google Patents

Description

TECHNICAL FIELD The present invention relates to a coin inspection method in a coin sorting device that determines the appropriateness based on the degree of influence of an inspection coin on an oscillating magnetic field.

(B) Conventional technology Generally, such a coin sorting device brings an inspection coin closer to a sensor that forms an oscillating magnetic field, and captures the degree of influence on the sensor caused by the change in inductance, frequency, phase, induced voltage, etc. It measures the characteristics of coins. And as a conventional coin sorting device, Japanese Patent Publication No. 52-62
There is a configuration disclosed in Japanese Patent Publication No. 00, in which two types of sensors are provided, one for inspection and one for reference, a true coin is placed in advance for reference, and when the inspection coin passes through the sensor for inspection, both The suitability of this coin is determined by comparing the measurement results. Further, as a reference setting, there is also a configuration shown in Japanese Patent Publication No. 48-799, for example, in which a variable resistor or a variable capacitor is used so as to be the same as the electrical condition of the reference coin.

However, recently, as disclosed in Japanese Patent Laid-Open No. 49-95692, due to the downsizing of the device and the ease of setting the standard,
A semiconductor memory has been used in place of such reference coins and reference setting components to set the acceptance range of appropriate coins as reference information. However, this range of acceptance can be increased when discriminating coins with significantly different characteristics, but when the characteristics are very similar depending on the type of coin, or when delicate counterfeit coins are inserted. Has no choice but to set the acceptance range narrow. And in this case,
In addition to the influence of the frequency, voltage, temperature of the oscillating magnetic field and external changes of various electric elements in the sensor circuit, the circuits, elements, and mechanisms must be devised so that the relative positional relationship between the inspection coin and the sensor is always constant. This complicates the device. Therefore, Japanese Patent Laid-Open No. 48-29499 discloses a device in which a circuit or mechanism for preventing a change over time is omitted by canceling the influence of the fluctuation by adjusting the fluctuation amount of the inspection condition from the measured value of the coin. It is disclosed.
However, the technique according to this publication is premised on that the variation of the measured value due to the change over time always changes at the same rate. However, in this type of coin sorting device, it is known that the measured value changes exponentially with respect to the fluctuation of the measurement condition, and according to the above-mentioned conventional technique, the fluctuation of the measurement condition can be dealt with only within a narrow range. .

Therefore, in Japanese Patent Laid-Open No. 56-110194, the rate of change in the measurement conditions is calculated from the measured value of the sensor during standby, and the value of the rate of change is multiplied by a correction coefficient to obtain the correction value. There is disclosed a coin sorting device configured to sense an inspection coin and output a measured value, and correct the measured value with a correction value to cancel the influence of fluctuation. According to such a conventional technique, by setting the correction coefficient in anticipation of the change in the measured value when the measurement condition changes, it is possible to correct the measured value close to the actual value.

(C) Problems to be Solved by the Invention However, in the conventional methods of coping with changes over time, even if there is a difference in accuracy in the correction calculation method in order to correct the measured value, The corrected measured values are not actual ones, but only predictions. However, since there are many factors that change over time and various factors are intricately entangled with each other depending on the external environment at any given time, there is a limit in correcting the measured value with a certain function. Although the measured values vary depending on the location where the device is installed and the variations in the device itself, setting the acceptance range to satisfy all of these causes a problem that the acceptance rate of the fake coins becomes high.

Therefore, the present invention does not correct the measured value but sets the acceptance range according to the occasion, and determines the appropriateness of the inspection coin based on the actual measured value. Therefore, the coin determination data, which is the reference of the acceptance range, is corrected by this measurement value every time a proper measurement value is obtained with a genuine coin, in preparation for the next inspection. Then, some genuine coins that correct the acceptance range are inserted, and when the device is stable and the coin determination data corresponds to the external environment of the installation location, the acceptance range, which is the width of the acceptance range, is set. By narrowing,
It is intended to improve the sorting accuracy.

(D) Means for Solving Problems In order to solve the above problems, the coin inspection method in the coin sorting device according to the present invention forms an oscillating magnetic field,
The coin data is detected by measuring the degree of influence of the inspection coin on the magnetic field, and the coin data and the coin judgment data are compared, and if both data match within the allowable range, the inspection coin is detected. In the coin sorting device that determines that the coin is appropriate, a second range included in the allowable range is set in advance, and when the coin data obtained by the inspection coin is within the second range, the coin range is determined based on the coin data. When the number of inspection coins satisfying the second range reaches a predetermined number so as to correct the coin determination data, and thereafter, the coin data and the coin determination data are compared with each other in the allowable range. It is designed to discriminate in a narrower space.

(E) Action The permissible range for determining that coin data and coin determination data match is initially a wide range, and coins with coin data that satisfy this range are appropriate. If the coin data also satisfies the second range, which is narrower than the allowable range, the coin is used as the genuine coin with less abrasion stains and is used for correcting the coin determination data. When the coin determination data is corrected, the acceptance range set in the allowable range based on this is also changed accordingly. Therefore, the acceptance range will change in response to changes in external conditions and measurement conditions of each device in preparation for the next coin inspection. Then, when a predetermined number of genuine coins that correct the coin judgment data are inserted, a large initial fluctuation of the coin judgment data due to the variation of the place where the device is installed and the device itself is stabilized, and the tendency of the original coin judgment data is determined. By setting the allowable range to a narrow range, a receiving range suitable for this device is set.

(F) Example FIG. 1 shows a coin sorting device (1) to which the present invention is applied, in which the inspection coins inserted into the coin slot (2) are rolled on the coin rail (3). Sensors (4), (5),
According to (6), the characteristics of the material, plate thickness and diameter are measured. The sensors (4), (5), and (6) form an oscillating magnetic field, and the degree of influence on the oscillating magnetic field due to the passage of inspection coins is grasped by changes in frequency, voltage, phase, etc.
It measures each characteristic of the inspection coin. Which characteristics of the inspection coins the sensors (4), (5) and (6) measure is determined by the oscillation frequency, the coil shape,
Furthermore, it is known that it depends on the mounting position of the sensor. In this example, the sensor (4) is, for example, 3K H
An oscillation coil is connected to an oscillator (7) that oscillates at a relatively low frequency such as z. Since the magnetic flux induced by such an oscillation frequency penetrates the coin, the degree of influence of the inspection coin on the oscillation magnetic field depends on its material, and the maximum frequency when the inspection coin passes through the sensor (4). By measuring with a measuring device (10), coin data about the material can be obtained. The sensors (5) and (6) are, for example, 1M
Oscillators (8) and (9) that oscillate at a relatively high frequency such as Hz are connected to respective oscillating coils, and the magnetic flux induced at the oscillating frequency penetrates only to the vicinity of the surface of the coin. Therefore, if the sensor (5) is connected to the oscillator (8) with a pair of oscillation coils connected in series and in reverse phase, and the inspection coin passes between the coils, the influence of the passage on the oscillation magnetic field is reduced. It depends on the respective distances from both coils to the coin, and this degree of influence indicates the plate thickness of the inspection coin. Therefore, by measuring the maximum frequency when the inspection coin passes through the sensor (5) with the measuring device (11), the coin data regarding the plate thickness can be obtained. Further, although the sensor (6) is a single oscillation coil, the sensor diameter is made larger than that of coins and the sensor rails (3) are arranged at a small clearance from the coin rail (3) so that the area facing the inspection coin has an outer diameter. If it is set differently depending on the above, the degree of influence of the inspection coin on the oscillating magnetic field depends on the outer diameter of the inspection coin. Therefore, by measuring the maximum frequency when the inspection coin passes through the sensor (6) with the measuring device (12), the coin data regarding the diameter can be obtained.

The data processing device (13) includes measuring devices (10), (11),
When each coin data is introduced from (12), memory (14)
The coin determination data is read from and compared with each other, and if both data match within the allowable range, the inspection coin is determined to be proper. The memory (14) stores 15 types of reference data as coin judgment data corresponding to the coin types A, B, C, D and E to be selected for each characteristic of material, plate thickness and diameter. ,
When the coin data is introduced from the measuring device (10), the data processing device (13) reads out the coin judgment data regarding the material for each coin type from the memory (14) and compares them.
If any coin determination data matches within the allowable range, it is determined in the material inspection that the inspected coin is the type of coin associated with the matched coin data. Further, when the coin data is introduced from the measuring device (11), the data processing device (13) reads out the coin judgment data regarding the plate thickness of each coin type from the memory (14) and compares the coin judgment data with any coin judgment. When the coins match with the data within the allowable range, it is determined that the coin is the type of the coin data. Similarly, when the coin data is introduced from the measuring device (12), the coin judgment data regarding the diameter is obtained. Make a comparison of. The inspection coin thus inserted from the coin insertion slot (2) rolls on the coin rail () and each sensor (4), (5), (6).
While passing through, the data processing device (13) performs each of the comparison operations described above and shows that the discrimination results of the material, plate thickness and diameter are all coins of the same type. Open the coin gate (15) as appropriate. As a result, the inspection coin that has finished rolling of the coin rail (3) is received in the device. However, if different results are obtained in each judgment, or if there is at least one inconsistency between the coin data and the coin judgment data, the data processing device (1
In 3), the inspected coin is determined to be a fake coin. At this time, since the data processing device (13) holds the coin gate (15) in a closed state, the coins rolled on the coin rail (3) are returned.

Explaining the above comparison operation with reference to FIG. 2, AS ₁₁ is coin determination data for determining whether the inspection coin is a type A coin in the material inspection, and is stored in the memory (14) as described above. , A ₁₁ is data indicating an allowable upper limit value when comparing the coin data and the coin determination data, and this data is set in the program of the data processing device (13). Therefore, the data processing device (13) is
When coin data is introduced from (0), memory (14)
More coin judgment data AS ₁₁ is read out and compared, and based on the coin data AS ₁₁ , it is within the range of a ₁₁ above and below, respectively,
That is, it is determined whether or not the coin to be inspected is the type A coin in the material inspection, depending on whether or not the coin data exists within the acceptance range AS _{15 to} AS ₁₄ . The present invention is characterized in that when an inspection coin is inserted and the coin data obtained by this coin satisfies a certain standard, the coin determination data is corrected by this coin data. As this criterion, the second range narrower than the allowable range, which is the width of the acceptance range, is set, and if the coin data is included in this second range,
In preparation for the next inspection coin, the coin determination data is corrected with the coin data. The fact that the coin data satisfies the second range, which is narrower than the allowable range, means that this inspection coin is a genuine coin with less wear and dirt, and the coin determination data should be corrected with the coin data obtained by such coin. so,
It is possible to effectively cope with changes over time of the coin sorting device. The data processing device (13) also programs the data a ₁₂ whose value is sufficiently smaller than the data a _{11 in} order to define this second range. The data processor (13) has data for defining the allowable range for coin types A, B, C, D, E for each characteristic of material, plate thickness, and outer diameter ( did
a ₁₁ ) and the data defining the second range (a ₁₂ described above for the material of the type A coin) are programmed respectively. Therefore, as shown in FIG. 4, when the inspection coin passes through the sensor (4) and the coin data SD ₁ is obtained by the measuring device (10), the data processing device (13) outputs the data SD ₁ (A to by any on belongs each acceptance range from D) S ₁₄ to (A~D) S _15, test coins as to determine whether any of types of to D, the second range corresponding to belong acceptance range Depending on whether it also belongs to (A to D) S ₁₂ to (A to D) S ₁₃ , the coin data SD _{1 is used} to determine whether or not to correct the coin determination data that is the reference of the acceptance range. That is, the coin data SD ₁ is the acceptance range AS _{14 to} AS ₁₅ and the second range AS _{12 to} A.
When all of S ₁₃ are satisfied, the coin determination data AS ₁₁ is corrected by the coin data SD ₁ . Further, when the inspection coin passes through the sensor (5) and the coin data SD ₂ is obtained in the measuring device (11), it is in any of the receiving ranges from (A to D) S ₂₄ to (A to D) S _25. The type of inspection coin is determined depending on whether it belongs, and the second range (A to D) S corresponding to the acceptance range to which it belongs
_{From 22} to (A to D) S ₂₃ , coin data S
In D _2, to determine whether to correct the coin determination data as a reference for the acceptance range. Likewise inspected coins measuring device through a sensor (6) to (12) of the coin data SD ₃ obtained coin data _{SD 3 (A~D) S 34 ~} (A~D) S 35 and ( A to D) S ₃₂ to (A to D) S ₃₃ are discriminated to determine whether or not the coin type and coin determination data need to be corrected. The coin type E is omitted in FIG.

FIG. 3 schematically shows the memory of the data rewritable memory (14). The part (M ₁ ) for storing the data about the material and the part (M ₂ for storing the data about the plate thickness). ), A portion (M ₃ ) for storing data about the outer diameter, and a portion (M ₄ ) including storage portions DX _{1 to} DX _n for storing determination data for determining the reliability of storage. Each has a storage area (m ₁ ), (m ₂ ), (m ₃ ), (m ₄ ), and (m ₅ ) corresponding to coin types A, B, C, D, and E, respectively. Made of Then, in each storage area (m ₁ ), (m ₂ ), (m ₃ ), (m ₄ ), (m ₅ ) of the material, (A
~ E) D ₁₁ ~ (AE) D _1n each storage unit satisfies each second range of the coin data of each coin type A ~ E measured by the sensor (4). The n kinds of coin data to be stored are stored, and (A) in each storage area (m ₁ ), (m ₂ ), (m ₃ ), (m ₄ ), (m ₅ ) for the plate thickness.
~ E) D ₂₁ ~ (AE) D _2n in each storage unit satisfies each second range of the coin data of each coin type of A to E measured by the sensor (5). Data of n coins are stored and stored in the storage areas (m ₁ ), (m ₂ ), (m ₃ ), (m ₄ ), and (m ₅ ) for the outer diameter (A).
~ E) D ₃₁ ~ (AE) D _3n each storage unit satisfies the respective second range of the coin data of coins A to E measured by the sensor (6). N coin data are stored respectively. The n kinds of coin data satisfying the respective second ranges are rewritten to the latest ones. Therefore, if the coin data SD _{1 in} FIG. 4 satisfies the second range for class A coins in the material inspection, the coin data SD ₁ is stored in the storage unit AD ₁₁ and also in AD ₁₁ . The data is stored in the storage unit AD _12, and the data stored in AD ₁₂ · AD ₁₃ …… AD _{1 (n-1)} are shifted to AD ₁₃ · AD ₁₄ …… AD _1n , respectively. In the storage area AD ₁ in the material storage areas (m ₁ ) to (m ₅ ), the average value of the coin data stored in the storage portions AD _{11 to} AD _1n is the coin for the type A coin in the material inspection. It is determined data and store, in the storage unit BD ₁ storage unit BD ₁₁ ~BD
The average value of the coin data stored in _1n is B of the material inspection.
It is stored as coin determination data for seed coins. The storage units CD _{1 to} ED ₁ store the average values of the corresponding n types of coin data as coin determination data for C to E type coins in the material inspection.
Similarly, the storage unit AD in the plate thickness storage area (m ₁ ) to (m ₅ )
_{In 2 to} ED ₂ , the average value of n kinds of coin data for each of A to E type coins is stored as coin determination data, and the storage unit AD in the outer diameter storage areas (m ₁ ) to (m ₅ ) is stored.
_{In 3 to} ED ₃ , the average value of each of n types of coin data for the A to E type coins is stored as coin determination data. When the data processing device (13) is a coin data satisfying the predetermined second range is obtained, the corresponding one of the storage unit _{(A~E) D 11 · (A~E} ) D 21 · (A~E ) D ₃₁ is stored, the average value of the latest n kinds of coin data including this coin data is calculated, and any corresponding storage unit (A to
To store the coin determination data to _{E) D 1 · (A~E)} D 2 · (A~E) D 3. As a result, when the same type of inspection coin is inserted next time, it is determined whether the coin data obtained with this coin matches the corrected proper coin determination data within the allowable range and the second range. To be done.

Then, the storage units AD _{1α to} ED _1α store the total number of inserted coins satisfying the second range in the material inspection for each coin type from A to E, and the storage units AD _{2α to} ED _2α store A.
For each coin type up to E, the total number of coins that satisfy the second range in the thickness inspection is stored and stored in the storage unit AD.
_{3α to} ED _3α store the number of inserted coins satisfying the second range in the outer diameter inspection for each coin type from A to E. When the number of coins inserted into the data processing device (13) reaches a predetermined number, the storage units AD _{1β to} ED _1β · AD
_An overflag is set to a corresponding one of _{2β to} ED _2β and AD _{3β to} ED _3β . With the setting of this over flag, the data processing device (13) has an allowable range in which the coin data and the coin determination data are recognized to be the same when the same type of inspection coin is subsequently inserted and the inspection of the same characteristic is performed, Also, the second range for determining whether or not to correct the coin data is made narrower than before and the determination is performed. To describe this in Class A coin in material testing, a as shown in FIG. 2, as data for the data processing unit (13) for defining the allowable range of the direction narrow with a _11
13 is programmed and a ₁₄ is programmed with a ₁₂ as data to define the narrower second range. Therefore, in the material inspection of the type A coin, the data processing device (13) initially determined whether the coin data of the measuring device (10) was included in AS ₁₄ to AS ₁₅ and AS _{12 to} AS ₁₃ , When the over flag is set in the section AD _1β , the coin data will be AS ₁₈ ~ AS ₁₉ and AS ₁₆ ~ after that.
Determine if it is included in AS ₁₇ .

The data processing flowchart of the data processing device (13) is shown in FIGS. 5A and 5B, and the operation of the coin sorting device (1) will be described. After the power is turned on, the data processing device (13) reads the determination data stored in the storage units DX _{1 to} DX ₆ of the memory (14) in step S1 and determines whether the contents have changed. To do. If the judgment data has changed, proceed to the initial set mode INT and (A to E) D
_{(1 to 3) (1 to n)} and (A to E) D _{(1 to 3)} storage units are written with standard data, and DX _{1 to} DX _n storage units are provided with appropriate determination data. Along with writing, AD _1α- ED
_{1α · AD 2α ~ED 2α · AD} 3α ~ED 3α · AD 1β ~ED
Clear each storage unit of _1β / AD _{2β to} ED _2β / AD _{3β to} ED _3β . The standard data is the data obtained by the measuring devices (10), (11), (12) when various coins A to E, which are typical, are put into the coin sorting device (1) at the time of manufacturing, and the data processing device ( 13), the standard data (AE) S ₁₁ is stored in the storage sections (AE) D _{1 (1 to n)} and (AE) D _{1 in} the initial set mode INT.
Standard data (AE) S ₂₁ is stored in the storage units (AE) D _{2 (1 to n)} and (AE) D ₂ , respectively, and standard data (AE) S _{21 31} is stored in the storage units (AE) D _{3 (1 to n)} and (AE) D ₃ , respectively. Therefore, in the initial set mode INT, n types of coin data in the storage areas (m ₁ ), (m ₂ ), (m ₃ ), (m ₄ ), and (m ₅ ) for the material, plate thickness, and outer diameter The corresponding standard data of the same type are all written in the storage unit of, and the standard data is also written in the storage unit of the coin determination data which is the average value of these data.

Coin data SD ₁ from measuring device (10) in S3 step
Is input, the data processing device (13) causes the coin data SD ₁ and the storage unit AD ₁ · B of the memory (14) in step S5.
The coin judgment data stored in D ₁ , CD ₁ , DD ₁ , ED ₁ are sequentially compared, and if they match within the allowable range, in S7 step the coin judgment data belongs to
It is determined that the coin type is any of coins up to E. As is apparent from FIG. 4, in this example, the coin data may match a plurality of coin determination data, and at this time, the possibility of being all coin types that match is determined.
Next, in step S9, it is determined whether or not the coin data SD ₁ and each coin determination data match within the second range, and if they match, the coin determination data matched based on this coin data. Decide to make a correction. If each allowable range is narrowed down to the second range, is coin data SD ₁ not included in any of the second ranges, or included in one of the second ranges belonging to any of the coin types? Is. Therefore when included, in step S11, one of the storage unit AD ₁₁ ~ED ₁₁ corresponding to the coin type
This coin data SD ₁ is loaded into and the coin data of _(n-1) types stored in the storage units (AE) D ₁₁ to (AE) D _{1 (n-1)} are stored. Storage unit (A ~
E) D ₁₂ to (AE) D _1n are sequentially shifted. And next
In step S13, the coin judgment corrected by the average value of the n kinds of coin data stored in the storage units (AE) D ₁₁ to (AE) D _1n in which the data has been rewritten in step S11. Data is calculated and any corresponding storage unit AD
Load from _{1 to} ED ₁ and proceed to step S15. In step S15, the storage units AD _{1β to} ED _1β corresponding to this coin type are
If the over flag is set to, and the flag is not set, in step S17,
1 is added to the store value of the storage units AD _{1α to} ED _1α corresponding to this coin type. Then, in step S19, it is determined whether the stored value in the storage unit obtained by adding 1 has reached a predetermined number,
If it has arrived, in step S21, an overflag is set in the storage units AD _{1β to} ED _1β corresponding to this coin type. When the data processing device (13) sets this over flag, the next step S5 is the process of comparing the coin data with the coin judgment data belonging to this coin type, and the allowable range and the range shown in FIG. It is set to a narrower range and it is determined whether the two match.

Coin data SD ₂ from the measuring device (11) in step S23
Is input, the data processing device (13) causes the coin data SD ₂ and the storage unit AD _{2 of the} memory (14) in step S25.
・ Sequentially comparing each coin judgment data stored in BD ₂ , CD ₂ , DD ₂ , ED ₂ , and in S27 step,
It is determined that the coin is a type of coin that belongs to coin determination data that matches within the allowable range. In step S29, it is determined whether or not the coin data SD ₂ and each coin determination data match within the second range, and if they match, the coin determination data of the matched coin determination data is determined based on this coin data. It is decided to make a correction and the process proceeds to step S31. In S31 step,
Storage unit AD corresponding to any coin type from A to E that matched
_While loading this coin data SD ₂ into ₂₁ ~ ED ₂₁ ,
Hereafter, the storage unit (A to E) D ₂₁ ~ corresponding to this coin type
_{(A-E) D 2 (n-1)} stored in the (n-1) storage unit coins data street _{(A~E) D 22 ~ (A~E} ) D 2n
Shift to. Then, in the next step S33, the storage unit (A to
E) The coin determination data corrected by the average value of the n kinds of coin data stored in D ₂₁ to (AE) D _2n are calculated and loaded into any of the corresponding storage units AD _{2 to} ED ₂ . And proceed to step S35. In step S35, it is determined whether or not an overflag is set in the storage units AD _{2β to} ED _2β corresponding to this coin type. If the flag is not set, in step S37, the storage unit AD corresponding to this coin type is determined. 1 is added to the store value of _{2α to} ED _2α . Then, in step S39, it is determined whether or not the store value of the storage unit to which 1 has been added has reached a predetermined number, and if it has reached, in step S41, the storage units AD _{2β to} ED corresponding to this coin type.
Set the _overflag to _2β . When the data processing device (13) sets this over flag, S25
When the coin data is compared with the coin determination data belonging to this coin type in the process of step, the permissible range and the second range are set to be narrower than before and it is determined whether the two match.

Coin data SD ₃ from the measuring device (12) in step S43
Is input, the data processing device (13) causes the coin data SD ₃ and the storage unit AD _{3 of the} memory (14) in step S45.
・ Sequential comparison with each coin judgment data stored in BD ₃ , CD ₃ , DD ₃ and ED ₃ to judge the coin type in S47 step, and to judge the necessity of correction of coin judgment data in S49 step. Then, if correction is necessary, the coin data SD ₃ is loaded into the predetermined storage units AD _{31 to} ED ₃₁ in step S51, and the storage unit (A
~ E) D ₃₁ ~ (AE) D _{3 (n-1)} stores (n-1) coin data stored in the storage section (AE) D ₃₂ ~.
(AE) Shift to D _3n sequentially. Then, in the next S53 step, the data is rewritten in the S51 step, and the data is corrected by the average value of the n kinds of coin data stored in the storage sections (AE) D ₁₁ to (AE) D _1n. Calculated coin judgment data, and any corresponding storage unit AD ₃ ~
Load it on ED ₃ . Then, in step S55, it is determined whether or not an overflag is set in the storage units AD _{3β to} ED _3β corresponding to this coin type. If the flag is not set, in step S57 the storage unit AD corresponding to this coin type is set. 1 is added to the store value of _{3α to} ED _3α . And S5
When it is detected that the stored value of the storage unit added with 1 reaches the predetermined number in 9 steps, the over flag is set in the storage units AD _{3β to} ED _3β corresponding to this coin type in S61 step. As a result, the data processing device (13) next sets the allowable range and the second range to a narrower range than before when the coin data is compared with the coin determination data belonging to this coin type in the process of step S45. Determine if they match.

In step S63, if there is a common coin type among the coin types determined in steps S7, S27, and S47, it is determined that the inspection coin is a genuine coin of this type, and in the next step S65, the data processing device (13 ) Controls the coin gate (15) to accept inspection coins. However, if it is determined in any one of the above steps that it does not belong to any coin type, or if there is no common coin type among the coin types determined in each step, the inspection coin is a fake coin. Therefore, the acceptance control of the coin gate (15) is not performed.

The operation of the coin sorting device (1) described above will be described with reference to FIG. 6. Initially, a wide range of allowable range (solid line) and second range (dotted line) are set for the coin determination data indicated by the wavy line. Has been done. When genuine coins satisfying the second range are inserted, the coin determination data changes, but the rate of this change is severe. This is due to a large initial fluctuation due to the variation of the place where the device (1) is installed and the device itself, and the acceptance range is adjusted to an appropriate range. Then, at a time (t) when a predetermined number of genuine coins are inserted and the receiving range becomes stable, the allowable range is narrowed from before and a receiving range suitable for this device is set. Further, the second range is narrowed as compared with the conventional one and the subtle correction of the coin determination data is continued to cope with the change with time.

(G) Effect of the Invention According to the present invention, the coin receiving range in the coin sorting device can be set based on the external environment of the place where the device is installed and the internal conditions of each device, and then changes such as aging and drift. Therefore, in order to change the acceptance range to a more appropriate one, it is possible to always set a more appropriate acceptance range for the true coin. Further, since the allowable range is narrowed after the initial setting, an accurate receiving range can be set at an appropriate level corresponding to the external environment and internal conditions of the device, and coins can be sorted with high accuracy.

[Brief description of drawings]

FIG. 1 is a block diagram of a coin sorting device according to the present invention, FIG. 2 is a diagram for explaining an allowable range and a second range, FIG. 3 is a diagram schematically showing memory storage, and FIG. 4 is coin data. FIG. 5A and FIG. 5B are flowcharts showing the operation of the data processing device, and FIG. 6 is a diagram explaining an example of a method for setting the acceptance range according to the present invention. (1) …… Coin sorter, (4), (5), (6) ……
Sensor, (10), (11), (12) …… Measuring device, (1
3) ... data processing device, (14) ... memory.

Claims (1)

[Claims] 1. An oscillating magnetic field is formed, coin data is detected by measuring the degree of influence of an inspection coin on the magnetic field, and the coin data and the coin judgment data are compared with each other to be within an allowable range. In the coin sorting device that determines that the inspection coin is proper when both data match, the second range included in the allowable range is set, and the coin data obtained by the inspection coin is the second data. If it is within the range, the coin determination data is corrected based on this coin data, and when the number of inspection coins satisfying the second range reaches a predetermined number, the coin data and the coin determination are performed thereafter. A coin inspection method in a coin sorting device, which determines whether two pieces of data coincide with each other in a narrower range than the allowable range in data comparison.