JPS63301392A - Coin selector - Google Patents

Abstract

(57) [Summary] This bulletin contains application data before electronic filing, so abstract data is not recorded.

Description

DETAILED DESCRIPTION OF THE INVENTION B) Field of Industrial Application The present invention relates to a coin sorting device that applies an oscillating magnetic field to a test coin and determines the suitability of the coin based on the degree of influence of the oscillating magnetic field.

(B) Conventional technology As this type of coin sorting device, there is a technology disclosed in Japanese Patent Publication No. 56-51396, which places coins in a first electromagnetic field with a relatively high frequency and separates the coins from the electromagnetic field. Surface characteristics such as the outer diameter or thickness of the coin are measured based on the degree of interaction between the coin and this electromagnetic field. The material of the coin is measured by the degree of interaction between the two. And special public Sho 5B-698
According to Publication No. 5, outer shape detection sensors, material detection sensors, and material detection sensors of this measurement type are arranged along the coin path, and each sensor inspects the outer shape, material thickness,
A coin sorting device is shown that determines the coin as a genuine coin once the suitability of the material has been determined.

(c) Problems to be solved by the invention In order to simply measure the characteristics of a coin such as its outer diameter, thickness, and material, the characteristics to be measured must have the maximum influence on the oscillating magnetic field. The shape and arrangement of the inductive sensor is set to give the following characteristics, and the measurement results are naturally influenced by other characteristics. Therefore, it is difficult to accurately measure only one characteristic of a coin, especially the outer diameter. is added.

This means that even if the outer diameter of the test coin is slightly different from the official coin, if there is a corresponding change in thickness or material, the effects will be compounded and the outer diameter will be determined to be correct. There is.

Therefore, the present invention includes a coin sensor between an inductive sensor that measures material quality and an inductive sensor that measures thickness,
By specifying the positional relationship between the coin and each induction sensor when measuring the degree of influence and making the influence of the outer diameter of the coin constant on each induction sensor, the combined influence of the material and outer diameter can be avoided. This method accurately measures the combined influence of thickness, thickness, and outer diameter. As a result, the outer diameter can be determined accurately.

(d) Means for Solving the Problems In order to solve the above problems, the coin sorting device of the present invention includes a coin passage in which test coins roll, and a coin passage along the rolling direction of the coins. The first induction sensor is arranged in sequence and each forms an oscillating magnetic field, and the material is measured by the degree of influence on the oscillating magnetic field by the passage of a coin, and the thickness is determined by the degree of influence on the oscillating magnetic field by the passage of a coin. a coin sensor disposed between the first induction sensor and the second induction sensor; and a coin sensor that measures the maximum influence of the test coin on the first induction sensor. a first discrimination device that discriminates, a second discrimination device that discriminates the appropriateness of the value of the maximum degree of influence that the test coin has on the second induction sensor, and a second discrimination device that determines the rolling direction when the test coin reaches the coin sensor. a third determination device that determines the appropriateness of a value of the degree of influence on one of the induction sensors, which is disposed on the upstream side of the induction sensor;
a fourth discriminating device that determines whether the value of the degree of influence exerted on the other induction sensor is appropriate at the time when the test coin leaves the coin sensor; and a determination device that determines that the inspected coin is appropriate when it is determined that the coin is valid.

(E) Effect When the test coin rolls through the coin path and first passes one of the induction sensors arranged on the upstream side, the first discriminator determines the degree of influence of the test coin on the oscillating magnetic field formed by this sensor. Measure the maximum value and determine the appropriateness of this value0
Next, when the test coin is detected by the coin sensor, the third discrimination device measures the degree of influence of this coin on the oscillating magnetic field formed by the same induction sensor, and determines whether this value is appropriate.

When the test coin finishes passing through the coin sensor and is no longer detected, the fourth discrimination device measures the degree of influence of the coin on the oscillating magnetic field formed by the other induction sensor, and determines whether this value is appropriate. do.

The second discrimination device measures the maximum value of the influence of the test coin on the oscillating magnetic field formed by the other sensor, and determines whether this value is appropriate. The determining device determines that the test coin is valid if any of the first to fourth determining devices determines that the coin is valid.

(f) Embodiment FIG. 1 shows a schematic configuration of a coin sorting device, in which (4) is a coin slot, (5) is a coin passage through which coins introduced from the coin slot (4) roll, and ( 1) is the first induction sensor that measures the material of the test coin, (2) is the second induction sensor that measures the thickness of the test coin, and (6) is the return path (7) or The coin gate that distributes coins to the receiving passage (8), (9) is a coin detector that detects the introduction of coins into the receiving passage (8).Induction sensor (1) and (
Between 2), there are three coin detectors (3□), (3,) spaced apart vertically from the coin passage (5).
, <3. ) are placed. Coin detector (3,),
(3,) and (3m> each consist of a pair of light-emitting elements and light-receiving elements, and detect the passing of a coin by blocking the light.The coin sensor (31) is connected to the coin path (
The coin sensor (3,) is arranged at intervals approximately equal to the radius of the smallest coin C3 to be sorted from the coin passage (5), and the coin sensor (3,) detects the smallest coin C from the coin passage (5) with a radius larger than the smallest coin C3.
The coin detectors (3,) are arranged at intervals of a predetermined dimension smaller than the diameter of 3, and the coin sensor (3,) is smaller than the diameter of the largest coin C4 to be sorted from the coin passageway (5). They are arranged at predetermined intervals.

The first induction sensor (1) is equipped with an excitation filter (10), a reference filter (11) and a detection filter (12), and the excitation coil (10) is connected to an oscillator (13) to generate a relatively low 3KHz oscillation. A magnetic field is formed, and when a coin passes through the coin passage (5), a reference coil (11
) and the detection coil (12), the degree of influence of the coin on the oscillating magnetic field is detected based on the phase difference between the signal waveforms of the detection coil (12).

That is, the output signals of the reference coil (11) and the detection coil (12) are waveform-shaped by the waveform shaping circuit <14> (15), respectively, and then introduced into the AND gate (16). On the other hand, since the clock pulse is introduced from the clock pulse generation circuit (17) to the AND gate (16), the AND gate (16)
6) outputs a clock pulse corresponding to the phase difference of the output signals. The second induction sensor (2) is made up of oscillation coils (18) and (19) connected in series and in reverse phase across the coin path (5), and is connected to an oscillator (20) to generate a relatively high frequency I MHz. It forms an oscillating magnetic field. When a coin passes through the coin path (5), the induction sensor (2) generates a mutual inductance according to the distance between the oscillation coil (18) and the coin surface and the distance between the oscillation filter (19) and the coin surface. This is to detect the influence of the coin on the oscillating magnetic field.At this time, each oscillating coil (1B) (19)
The distance from the surface of the coin to the surface of the coin depends on the thickness of the coin being tested.

(25) is a counter that measures the degree of influence of the test coin on the oscillating magnetic field formed by the induction sensor (1) by counting the clock pulses output from the AND gate (16) and measuring the phase difference. The phase difference between the signals between the reference coil (11) and the detection filter (12) is determined by the reference coil (11).
) signal rises until the next signal of the detection coil (12) rises, but the counter (25)
starts counting clock pulses at the rising edge of the signal from the reference coil (11), and is reset at the rising edge of the signal from the detection coil (12) to complete one phase difference measurement. This phase difference measurement operation by the counter (25) is repeated many times while the test coin passes the induction sensor (1), but the phase difference when the coin directly faces the induction sensor (1) indicates the maximum value. (21) is a first discriminator that detects the maximum value among the phase difference values sequentially introduced from the counter (25), and uses this value as a coin of the same kind set according to the coin type to be sorted in advance. The structure is such that the suitability of the test coin is determined by comparing it with a reference value. (24)
is a fourth discrimination device that detects the value of the phase difference measured by the counter (25) at the time when the test coin is detected by the coin sensor (3,), and determines the type of coin to be sorted in advance based on this value. By comparing with similar standard values set according to
This is a configuration for determining the suitability of test coins.

(26) is a counter to which a reset signal is introduced at a period of 1 ms, and the oscillation frequency of the oscillator (20) is measured by counting the output signal of the oscillator (20) every 1 ms period. When the test coin approaches the induction sensor (2), the oscillation frequency increases depending on the influence of its thickness on the magnetic field. Therefore, the counter (26) measures the degree of influence of the coin on the oscillation magnetic field by counting the oscillation frequency, and the degree of influence becomes the maximum value when the test coin directly faces the induction sensor (2). (22) is a second discrimination device that detects the maximum value among the oscillation frequency values sequentially introduced from the counter (26), and uses this value as a coin of the same type set according to the coin type to be sorted in advance. The structure is such that the suitability of the test coin is determined by comparing it with a reference value.

(23) is the third discrimination device, and the test coin is detected by the coin detector (3).
, ), the value of the oscillation frequency measured by the counter (26) is detected, and this value is compared with a reference value of the same type set in advance according to the type of coin to be sorted. This is a configuration that determines the suitability of the test coin.

In Fig. 3, the coin sensor (3,), (3,),
(3,) are arranged along the rolling direction of the coin for convenience, but in reality, as shown in FIG. 1, they are arranged perpendicularly from the coin passage (5). To achieve the present invention, it is sufficient to provide only the coin sensor (38), but in this example, by providing three types of coin sensors as described above, the outer diameter of the test coin can be powerfully measured. That is, (28) is a measuring device, and the test coin is detected by each coin sensor (3,), (3m>, (3,
) and the timing of reaching each coin detector (3+), (
at), (3s) and the timing when the coin finishes passing through each coin detector (3□), (3ri, (as)
Measure the transit time. Measuring bag! (28)
Specifically, the coin is detected by each coin detector (31), (3m
), (A counter (29
) according to the count value of each coin sensor (31), (ax
), (am) measures the timing when sensing the coin and the timing when sensing stops. And each coin sensor (31), (3ri).

Regarding (3,), the transit time is measured by the difference between the timing at which the coin is sensed and the timing at which the sensing is stopped.

(27) is a fifth discriminating device which calculates the correlation of the data measured by the measuring device (28) and compares it with reference data for the same correlation set in advance for coins to be sorted. Then, the suitability and type of coins are determined based on the outer diameter of the coin.

And (30) is a determination device, the first to fifth determination devices (
21), (22), (23>, (24)
, (27), if the suitability of the test coin is determined, the coin gate (6) is driven.

A test coin inserted from the coin input slot (4) in the coin sorting device described above first passes through the induction sensor (1), but as the coin approaches the induction sensor (1), the coin passes through the counter (
Although not shown, the phase difference measured at the coin sensor (31) increases.

It is preferable that the light emitting element (3,) not be lit all the time, but to be lit when the phase difference measured by the counter (25) when a test coin is inserted shows an upward trend. Coin detector (3t), (3ri, (3,
) 0 discrimination device (21
) is calculated by successively comparing the phase differences output from the counter (25) as the test coin passes through the induction sensor (1). Detect the maximum phase difference. And the discrimination device (2
1) is compared with preset standard values for genuine coins for each type of coin, and if it matches any standard value within the tolerance range, the coin is of the type related to the matched standard value. Discern. Through this determination operation, the suitability of the test coin is determined mainly from the viewpoint of the material.

When the test coin reaches the coin sensor (3,) and the coin sensor (3,) outputs a sensing signal S, the discrimination device (
24) introduces the phase difference measured by the counter (25) at this time and compares it with a reference value for the same type of coin, which is set in advance for each type of coin. In this comparison, if the value of the phase difference matches any reference value within the allowable error range, the discrimination device (24) discriminates the coin as the type related to the matched reference value. This type of discrimination operation is different from the discrimination performed by the discrimination device (21) which detects the maximum value of the phase difference, and instead specifies the positional relationship between the coin and the induction sensor (1) according to the outer diameter of the coin to be tested. In order to detect the phase difference in this state, the suitability of the test coin is judged from the viewpoints of material and outer diameter.

In addition, the test coin is detected by the coin detector (3,), (3,),
When passing through (3,), each sensor (31), (3
, (3,) generate sensing signals St, St, and Ss, respectively, at the timings shown in the fourth timing chart. The measuring device (28) measures the rising time tl*ta rt and the falling time t4y t of the outputs A, B, C.
a r ta and transit time T I.

Measure T* and Ts, respectively. And the discrimination device (4) has each coin sensor (21>, (z*),
Correlation of coin transit time between (2m) rm/
Interrelationship of Ts, TI/Tl, Tt/xs and passage timing (1,-1ha/(1*11
).

<t4-ts)/(ts-t+) By deriving each numerical value and comparing it with each standard data set in advance for each coin pole to be sorted, it is possible to determine which coin type the measured value corresponds to. The appropriateness and type of the coin are determined by determining whether it belongs to the coin. Coin detector (3,), (3,), (
This type of discrimination operation using only 3) is effective for more accurately measuring the outer diameter of the test coin, and by determining the correlation between the passage time and passage timing, each test coin is determined to be a coin. Errors in outer diameter measurement due to variations in the speed of rolling in the passageway (5) are eliminated.

When the test coin approaches the induction sensor (2), the oscillation frequency counted by the counter (26) at a period of 1 ms increases. Then, the test coin is no longer detected by the coin sensor (3,), the detection signal S is stopped, and the inverter (3,
When the output of 1) is reversed, the discrimination device (23) introduces the oscillation frequency measured by the counter (26) at this time, and uses the same type standard for genuine coins set in advance for each coin type. Compare with value. In this comparison, if the value of the phase difference matches any reference value within the allowable error range, the discrimination device (23) determines that the coin is of the type related to the matched reference value. This type of discrimination operation is performed in order to identify the positional relationship between the coin and the induction sensor (2) according to the outer diameter of the test coin and detect the oscillation frequency in that state. Appropriateness is judged from this aspect.

The discrimination device (22) successively compares the oscillation frequencies sequentially output from the counter (26) as the test coin passes the induction sensor (2), thereby determining whether the test coin matches the induction sensor (2). Detect the maximum oscillation frequency when the Then, the discrimination device (22) compares it with preset reference values for genuine coins for each type of coin, and if it matches any of the reference values within the tolerance range, it determines the matched reference value. Determine the type of coin. In such a discriminating operation,
The value when the test coin exerts the maximum influence on the oscillation magnetic field is detected at the oscillation frequency, and the suitability of the test coin is determined mainly from the aspect of thickness.

The determination device (30) is configured such that the determination device (21), (
22).

Coin gate (6
) gives an open signal. Therefore, the test coins rolling through the coin passageway (5) are introduced into the receiving passageway (8). When the coin detector (9) detects the introduction of a coin into the receiving passageway (8), the determination device (30) stops outputting the open signal to the coin gate (6) and closes the coin gate (6). .

Effects of the Invention The present invention determines the material of the test coin based on the value when it exerts the maximum influence on the oscillation magnetic field formed by the first induction sensor, and The thickness is determined by the value when it exerts the maximum influence on the magnetic field. Then, by detecting the degree of influence of each positional relationship between the first induction sensor, the second induction sensor, and the test coin using the coin detector, the material, outer diameter, thickness, and outer diameter are determined, respectively. . According to the present invention, by determining each of the material, thickness, material, outer diameter, thickness, and outer diameter, the outer diameter of the coin can be accurately determined.
The same effect can be obtained as determining the suitability of a coin by individually inspecting each characteristic of the material, thickness, and outer diameter. Therefore, according to the present invention, since the degree to which coin suitability is determined based on the comprehensive measurement results of each characteristic is reduced, accurate coin sorting can be performed.

[Brief explanation of drawings]

Figure 1 is a mechanical diagram of the coin sorting device, Figure 2 is a diagram showing the positional relationship between the induction sensor, coin detector, and coins to be tested.
The figure is a block diagram showing the configuration of the coin sorting device, and FIG. 4 is a timing chart illustrating inspection using a coin sensor. (1)...First induction sensor, (2)...Second induction sensor, (3,)...Coin sensor, (21)
...first discrimination device, (22)...second discrimination device,
(23)...Third discrimination device, (24)...Fourth
Discrimination device, (27>...fifth discrimination device, (30)
...Judgment device.

Claims (1)

[Claims] 1. There is a coin passage in which the test coin rolls, and the coin passages are arranged in sequence along the coin rolling direction to form an oscillating magnetic field, depending on the degree of influence on the oscillating magnetic field due to the coin passing The first inductive sensor measures the quality of the material, and the second sensor measures the thickness based on the influence of the coin's passage on the oscillating magnetic field.
an inductive sensor; a coin sensor disposed between the first inductive sensor and the second inductive sensor; a second discrimination device that determines the appropriateness of the maximum influence value that the test coin has on the second induction sensor; a third discriminating device for determining the appropriateness of the value of the degree of influence exerted on one of the disposed inductive sensors; and a third discriminating device for determining the appropriateness of the value of the degree of influence exerted on the other said inductive sensor at the time the test coin leaves the coin sensor. Fourth step to determine suitability
A coin sorting device comprising a discrimination device and a determination device that determines a test coin to be proper if any of the discrimination results of the first to fourth discrimination devices determines that the coin is proper.