JPH0782557B2 - Coin identification device - Google Patents

Description

Description: TECHNICAL FIELD The present invention relates to a device for discriminating the denomination and authenticity of coins by discriminating elements such as material and diameter.

(Prior Art and Problems Thereof) In a conventional coin discriminating apparatus, an optical sensor, a magnetic sensor or the like detects discriminating elements of passing coins, that is, elements such as diameter and material, and the detection signal is fixedly set in advance. The discrimination level is compared with each stored discrimination level, and the denomination and authenticity of the coin are discriminated based on the comparison result. For example, in a coin discriminating device applied to a coin sorting machine (including a coin depositing machine and a coin depositing / dispensing machine), it is necessary to process coins mixed in multiple denominations at high speed and pass through the coin discriminating section. At this time, it is difficult to reliably regulate the coin on one side of the passage, and the coin is usually considered so that it can be identified regardless of the position in the width direction of the passage. However, even if the coin is a normal coin due to an error in the mounting position of various sensors, variations in each part, etc., the detection signal often does not fall within the discrimination level standard and is often identified as a false coin. Therefore, very precise adjustment is required in the manufacturing process.

(Object of the Invention) The present invention has been made under the circumstances described above, and when a reference coin is passed in advance and as a result, there is a coin that is not identified as a normal coin, each reference identification is performed. When the upper limit value or the lower limit value of the discrimination level of an element is corrected by an appropriate amount based on the data of coins that are not identified as normal, and the corrected value is within the limit value preset for the denomination, An object of the present invention is to provide a coin discriminating device that is updated and stored and has a high pass rate (the ratio of discriminating normal coins as normal coins) without careful adjustment.

(Summary of the Invention) The present invention relates to a coin discriminating device, which is a coin (420).
Detection means (100, 200) for detecting the identification element of
Discrimination level storage means (540, 541) that stores in advance a discrimination level consisting of an upper limit value and a lower limit value for determining pass / fail for each of the identification elements, and each output of the detection means (100, 200) and the upper limit. An abnormal value storage means (541) for storing a detection output of a coin (420) outside the region of the discrimination level by comparing a discrimination level composed of a value and a lower limit for each discrimination element, and the discrimination level. Discriminating level correction instructing means (545) instructed by the operator when the upper limit value or the lower limit value of the discriminating level is required to be corrected, and the discriminating level storing means (545) when correction is instructed by the discriminating level correction instructing means (545). 540, 541) the upper limit value or the lower limit value of the discrimination level stored in advance is corrected based on the stored contents of the abnormal value storage means (541), and the corrected upper limit value or the lower limit value of the discrimination level is determined for each denomination. Was A determination level correction means for updating and storing the corrected upper limit value or the lower limit of determination level when in the field value (500,540,541), in which equipped with.

(Embodiment of the Invention) First, a sensor 100 for detecting a material as a detecting means used in the present invention will be described with reference to FIGS. 3 and 4.

The entire sensor 100 is molded by resin or the like to be integrated, but a central portion 101 and an upper central portion 102 through which hard passes are opened. A primary coil 104 for excitation and a secondary coil 105 are wound around a primary core 103 at the bottom, and a secondary core 106 separated from the left and right at a central portion 102 is provided at the top.
And 107 are provided, and these secondary cores 106 and 107 are provided.
Secondary coils 108 and 109 are respectively wound around.
The secondary cores 106 and 107 have a vertical cross-sectional shape such that the distance between each lower surface and the upper surface of the primary core 103 increases outward from the open portion of the upper center 102. Figure 4 shows the primary core
The positional relationship between 103 and the secondary cores 106 and 107 is shown.
When the primary core 103 is excited by the primary coil 104, 2
Magnetic flux lines 110 are generated which extend toward the next cores 106 and 107.

FIG. 5 (A) shows a state of the magnetic flux lines 110 in the case where there is no secondary core, and it can be seen that the magnetic flux lines 110 are bent outward. When two rectangular parallelepiped-shaped secondary cores 106A and 107A separated from the primary core 103 are arranged above the primary core 103, the magnetic flux lines 110 are outward as shown in FIG. 5 (B). It was confirmed that the slope to was small. However, the secondary core 10
If the shapes of 6A and 107A are such, the magnetic flux lines 11
As 0 is not in the uniform direction as shown in the figure,
The sum of the coil differential outputs for detection which will be described later is the central portion 101.
It will change due to the lateral displacement of the object passing through.
Therefore, as shown in FIG. 5C, the secondary cores 106 and 107
If the bottom portion of the secondary core is inclined and the distance from the primary core 103 is reduced in the central portion, the outward inclination of the magnetic flux lines 110 in the portions from the center of each of the secondary cores 106 and 107 is further reduced. The magnetic flux densities at the bottoms of the secondary cores 106 and 107 are also substantially equal.

The operation will be described with reference to FIGS. 6 (A) and 6 (B).
As shown in FIG. 6A, when the coin 120 passes the leftmost side of the central portion 101 of the sensor 100, x = 0 is set, and the coin 120
The coil output MS when is shifted to the right is shown in FIG.
In FIG. 6B, A indicates the differential output of the secondary coil 105 and the secondary coil 108 of FIG. 3, and B indicates the differential output of the secondary coils 105 and 109. Here, the differential outputs A and B are added to detect the material of the object. The result of the addition is that when the secondary core has a structure as shown in FIG. Although the curve becomes like the characteristic D due to the difference, it becomes a straight line having the constant characteristic C by inclining as shown in FIG. 5 (C). Therefore, even if the coin 120 shifts to the left and right, the material of the object can always be detected accurately.

Next, an example of the coin classifier will be described with reference to FIG.

401 is a rotating disk, and coins 420 of mixed denomination inserted therein are moved along the peripheral wall 402 by centrifugal force due to rotation, and a coin that is stacked on two or more sheets is blocked by a thickness regulating member (not shown). The sheets are delivered one by one from the delivery port 403 to the passage 404. The coins 420 sent out are pulleys 405 and 40.
A round belt 407 stretched over 6 causes the passage 404 to be shown in the drawing N.
It is forcibly conveyed in the direction. Since the speed of the round belt 407 is higher than the speed at which the coins 420 are sent out from the rotary disc 401, the coins 420 in series are separated and conveyed.
The coin 420 passes over the sensor 200 (described later) installed in the passage 404, and further passes through the center portion 101 of the sensor 100. The material of the coin 420 depends on the output of these two sensors,
The diameter and presence of holes are judged. If it is determined that the coin is abnormal or abnormal, when the sensor 410 detects this coin, a branch plate (not shown) protrudes from the long hole 411 provided at the bottom of the passage by driving the solenoid, and this false coin is 7th
The sheets are sorted in the right direction of the drawing, passed through the guide 412, and stored in a storage portion (not shown) provided below. The sensor 410 and the branch plate are paired, and a plurality of sets are provided corresponding to each denomination in the latter stage of the passage 404. Based on the outputs of the sensors 200 and 100, the authenticity, the denomination determination result, When the coin 420 reaches the corresponding sorting point, the branch plate concerned passes the passage.
The coins projecting above 404 can be reliably stored in the storage units for each denomination. In addition, in the unlikely event that coins 42
When 0 is blocked, the pulley 406 shaft is used as the fulcrum.
The 5 side can be rotated upward, and the round belt 407
Can move upward through the open upper central portion 102 of the material detecting sensor 100, so that the stuck coin can be easily removed.

FIG. 1 shows a block diagram of the control system. First, the basic processing of the output of the sensor 100 described above will be described.

The outputs of the secondary coils 108 and 109 and the secondary coil 105 of the primary core 103 are respectively amplifiers 501, 511 and 521 and a half-wave rectifier 502 512.
522 and low-pass filter 503 513 523 are input to the adder / subtractor circuit 542, and the difference output A of the secondary coils 105 and 108
And the differential output B of the secondary coils 105 and 109 are calculated, and the added value C of the differential outputs A and B is obtained. Then, after the added value C (CH5) is amplified (CH4) by the amplifier 544, it is converted into a digital signal at a predetermined timing by the A / D converter 543, and this signal is sequentially stored in the RAM 541 via the CPU 500. To go. At this time, the previously stored value is compared with the current value, and if the current value is larger, this value is stored as the maximum value. As the coin 420 approaches the sensor 100, the sum C of the differential outputs increases as shown in FIG. 8, and when the center of the coin 420 is past the center CL of the sensor 100, it decreases. Since the peak of the signal is stored in the RAM 541 as the maximum value, it is read out and compared with each discriminating level stored in the ROM 540 in advance to determine which range C0 to C4 in FIG.
The RAM 541 stores any of C0 to C4 as a determination result of the material 2 of the identification element. In addition,
The peak value is determined not only by the material of the coin, but by the three factors of diameter and mass. FIG. 9 shows the levels of C of the addition signal for various coins in comparison, and is 10 yen coin, 1 yen coin, 5 yen coin, 500 yen coin, 100 yen coin.
The level of signal C decreases in the order of yen coins and 50 yen coins, and the difference between 500 yen coins and 500 won in Korea is extremely small. Here, the value of the addition signal is superimposed on some denominations, but the denomination can be finally specified by adding other identification elements. In FIG. 9, the range other than the ranges C1 to C4 is C0. Also, the secondary cores 106 and 107
The shape of the slope of is finally determined experimentally so that the sum C of the differential outputs is constant. In this case, it is desirable to determine the inclination angle so that the locus with which the magnetic flux density becomes constant is easy to see. Even if the coin jumps in the sensor 100 in the up-down direction due to rubber or the like, the output hardly changes because the differential is taken in the up-down direction.

In the above sensor, when the temperature T of the environment of the sensor 100 changes, the coil impedance changes, the current flowing through the secondary coils 105, 108 and 109 changes, and the differential outputs A and B are changed.
Since it also changes, the output C or the reference value in the ROM 540 needs to be corrected in accordance with the temperature T in order to make a more accurate determination. An example thereof will be described below.

By the way, the temperature T can be detected by the output level of the secondary coil 105 when the coin 420 is not near the sensor 100. For example, the addition / subtraction circuit is used to detect the absence of coins.
The output C of the 542 and the output of the secondary coil 105 are alternately sampled, and the value C of the sum of the differential outputs does not change for a predetermined time (predetermined number of times), and the value is the level when a coin does not exist in the vicinity. When it is, it is judged that there is no coin, and the value of the secondary coil 105 read at this time is compared with the value for each temperature (for example, 1 ° C. pitch) stored in the ROM 540 in advance to detect the temperature T. be able to. After the maximum value of the differential output sum C (FIG. 8) is obtained based on this temperature information,
After correcting this maximum value, the material is judged by comparing with the reference value. Alternatively, the reference value may be corrected based on the above temperature information, and then the determination may be made by comparing with the maximum value of the calculated sum of the differential outputs. In either case, the correction value may be calculated each time based on the temperature, or the correction value may be calculated in advance in the ROM 540 for each temperature.
Alternatively, the correction value may be directly obtained from the address corresponding to the detected temperature. The temperature may be detected immediately after the power is turned on, immediately after the start command, or when the flow of coins is interrupted during coin processing.

Next, FIG. 10 shows the structure of the sensor 200 for hole detection. This sensor 200 is a known differential magnetic sensor, and when the coin 420 is a currency, a difference occurs between the outputs of the upper secondary coil 202 and the lower secondary coil 203, and this difference DS is taken out as an output. The output DS is input to the A / D converter 543 via the amplifier 531, the half-wave rectifying path 532, and the low-pass filter 533 as shown in FIG.
It is designed to be converted into a digital quantity. FIG. 11 (A) shows an example of the output DS for a 5-yen coin with a hole, and FIG. 12 shows an example of the output DS for a 1-yen coin without a hole. 2C shows the differential output of FIG. 3C and its ternary output.

The hole detecting operation of the sensor 200 for the coin 420 will be described according to the flow of FIG.

The output DS of the sensor 200 is input to the A / D converter 543, but the difference C of the differential output is sequentially output by the channel switching signal from the CPU 500, the output CH3 of the secondary coil 105, the output DS of the sensor 200.
= F (t) are repeatedly written in the RAM 541 as sampling values (step S1). Sampling frequency is 1
It is about several hundred times per sheet. When the sampling period is α, each time the output DS of the sensor 200 is read, f ′ (t) = f (t + α) − (t), which is approximately equivalent to the differential coefficient, is also calculated and stored, and f (t) Depending on the value of the coin 420 sensor 2
It is determined that the vehicle has passed over 00 (step S2). Then, among the stored differential coefficients f ′ (t), the maximum value Ma
x {f '(t)} and the minimum value Min {f' (t)} are detected (step S3), and the differential coefficient f'is determined from these two values.
Thresholds S + and S for pulsing (t)
-Is calculated (step S4). The positive threshold is S + = K1 * Max * {f '(t)}, and the negative threshold is S- = K1 * Min * {f' (t)}. K1 is a constant and can be set arbitrarily in design, but is set to 0.2, for example. This is to cope with the fluctuation of the output level. As a result, the individual values of the differential coefficient f '(t) stored in the RAM 541 are compared with the thresholds S + and S- and pulsed into three values (step S5). That is, f '
If (t) ≧ S +, “1” is newly stored in the RAM 541, if S− <f ′ (t) <S +, “0”, and if f ′ (t) ≦ S−, “−1” is newly stored. And the maximum width part is the place where "+1" is
The t1 and the maximum width part t2 at the position where "-1" is detected (determined by the number of addresses that are continuously +1 (or -1)) (step S6), and their values Is multiplied by a constant K2 to calculate times t1 ′ and t2 ′ (step
S7). The reason that the time widths t1 'and t2' are not fixed is to allow the change of the transport speed to be dealt with. Time t
The data is read from the address of the RAM 541 corresponding to the 1'portion, it is determined whether or not there is "-1", and the data is further read from the address of the RAM 541 corresponding to the time t2 'portion and the "+" is added.
It is determined whether or not there is 1 ", and when" -1, + 1 "is in the corresponding portion, it is determined that the coin having a hole has passed (step S8). Also, at time t1 ', t2' portions. Judges that there is no such pulse and there is no pulse (+1, -1) at a position other than the time points t1 and t2 (step S9), the time t1 'and t2' are concerned. When there is no pulse, but when there is a pulse at a position other than the time t1 and t2 parts (for example, when there is +1 instead of -1 at the t1 'part), it is determined that the coin is a deformed coin.
The signal DS judged as such a deformed coin is, for example,
It becomes as shown in FIG. 14 (A), its differential waveform is as shown in FIG. 14 (B), and its ternary output is as shown in FIG. 14 (C).

The maximum value of the signal DS is also stored in the RAM 541 as a material signal. This output hardly depends on the diameter and mass (thickness) of the coin, but only on the material. Hereinafter, this identification element is referred to as material 1. As shown in Figure 15, the output
Any one of the three ranges A0, A1, A2 is specified. For example, the range A2 indicates a bronze series, the range A1 indicates other genuine coins, and the range A0 indicates coins of different materials, and one of the ranges A0 to A2 is stored in the RAM 541 as the determination result of the material 1.

Next, an example in which the diameter of the coin is determined based on the output values of both the sensor 200 and the sensor 100 will be described.

FIG. 16 shows the positional relationship between the coin 420 and the sensors 100 and 200.
When the coin 420 without a hole is conveyed in the direction of the arrow, the output DS of the sensor 200 becomes as shown in FIG. 17 (A), and the output C of the sensor 100 becomes as shown in FIG. 17 (B). First, the output DS of the sensor 200
= F (t) rises, and then the coin 420 reaches the position of the sensor 100, C = g (t) rises.

The diameter discriminating operation will be described based on the flowchart of FIG. As described above, the sampling is the sum C of the differential outputs of the sensor 100, the output of the secondary coil 105, the output DS of the sensor 200.
Are repeated in this order (step S10). Sensor 2
The output value of 00, DS = f (t), and the sum value of the differential output of the sensor 100, C = g (t), are stored as sampling values, and at the same time compared with the previous value. Is updated, and when g (t) is below a predetermined level after the increase, that is, when the coin 420 almost passes through the material sensor 100 in the subsequent stage, the maximum value of g (t) sampled.
Max {g (t)} is read (steps S11, 12), g
The address of the RAM 541 corresponding to the value t ′ of t satisfying (t) = Max {g (t)} × 0.4 is detected (step S1
3). That is, the time t'when the sum C of the differential outputs reaches 40% of the peak value is searched for. There are two parts corresponding to 40% of the peak value, but the one with earlier time is used. Here, the number of coefficient 0.4 can be appropriately set according to the distance between the sensors described later, the size of the sensor 200, and the like. With the address of g (t '), f (t') is read from the address in which the value f (t ') of f (t) at the simultaneous point t'is stored. The maximum value Max {f (t)} of f (t) is also read (step S14) and Pr = f (t ') / Max {f (t)} is calculated (step S15). That is, it is possible to calculate what percentage of the peak of the sensor 100 the output DS of the preceding sensor 200 at the time when the sum C of the differential outputs of the latter sensor 100 reaches 40% of the peak. is there. If the value of the ratio Pr is large, it means that the ratio of the coin 420 hanging on the sensor 200 is large. Each reference value stored in advance in the RAM 540 is read to determine which range of D0 to D3 in FIG. 19 the ratio Pr is in, and stores it in the RAM 541 (step S16).

An example of the reference value range of the ratio Pr is shown in FIG. here,
The reason that the ratio Pr and the size of 1 yen and 50 yen are reversed is that the aluminum of the 1-yen coin has stronger magnetism than the white copper of the 50-yen coin and has a great influence on the sensor. For the same material, Pr and the size of the diameter can be set in a proportional relationship.
In the above description, t'when g (t) / Max {g (t)} is 0.4 is obtained, but for example, the ratio may be Cr and the relationship between Cr and Pr may be obtained. The reason why the reference value range of the ratio Pr is wide in FIG. 19 is that the error between the two sensor mounting positions is taken into consideration. Therefore, for example, when the calculation result of the ratio Pr is 0.6, it will be specified as either one of the two denominations of the 5-yen coin or the 100-yen coin. Can be confirmed as currency.

Which judgment result of each of the above four identification elements (materials 1 and 2, presence or absence of holes, diameter) is read from the RAM 541 and matches with the identification pattern of each denomination stored in the ROM 540 (FIG. 20). And determine the denomination finally. If it does not match any of the patterns, it will be judged as false and rejected. However, for example, 1 of material 2
Circles, 5 circles of diameter, 100 circles, 50 circles, etc. are identified in
As shown in Figs. 15 and 19, the levels are very close to each other. That is, the lower limit of 1 circle of the material 2 and the sixth discrimination level are close to each other, and the detected peak value may belong to the range C2 due to an error, a variation, or the like. If this happens, the pattern will not match the 1-yen pattern and will be rejected, resulting in a lower pass rate. To prevent this
Only when either the material 2 or the diameter does not match the pattern of the denomination, it is necessary to review the discrimination.

Now, if the detection peak value of the material 2 for one circle is 3.25V and is below the sixth discrimination level of 3.30V (the other three discriminating elements match all one circle). , The range C2 is stored, but the discrimination level of the range C1 of 1 yen,
That is, the sixth discrimination level and the seventh discrimination level are shifted by a predetermined amount, for example, ± 0.06V (regardless of denomination), and 3.24V to 5.06.
Make the range of C1 up to V and compare again with the measured peak value of 3.25V. As a result, the detected value of 3.25V falls within the range of C1 due to the decrease in the sixth discrimination level, and all four discriminant elements are matched with each other, so that it is discriminated as one circle and rejection can be prevented. . Similarly,
If only the diameter element is different, the diameter discrimination level for denominations determined by the other three discrimination elements is shifted up or down by a predetermined amount, for example ± 0.05, then compared again, and the difference is within the new discrimination level. Identify as true coins.

By the way, the sensor 200 is a known differential magnetic sensor, and the output is 0 when there is no coin. Therefore, the amplification factor of the amplifier 531 is adjusted using the reference coin so that the value of the output CH0 becomes the set value. This completes the initial adjustment.

Next, before performing the running test, the standard discrimination level stored in the ROM 540 is once copied into the RAM 541 as it is. Hereinafter, the discrimination is performed based on the discrimination level stored in the RAM 541. In order to copy the discrimination level, for example, the rotary switch RSW of the selection switch means 545 is used.
Select both 1 and RSW2 to the “F” (hexadecimal “F” corresponds to decimal “15”) position and push switch (not shown)
Turn on the power switch while pressing. If the discrimination level is not stored in the RAM 541 (if the above operation is not performed at all), the coin processing machine will not operate even if the start button is pressed. Since the data in the RAM 541 is backed up by the battery even when the power is turned off, the above operation usually needs to be performed only once before shipment from the factory. In this state, a running test is conducted for each denomination.
For example, when passing 100 yen coins, 500 yen coins are identified one by one by the identification elements of diameter, material 1, material 2 and presence or absence of holes as described above.
If 100 cards are passed and 100 cards are passed, 50 yen coins, 10 yen coins, 5 yen coins and 1 yen coins are sequentially processed in the same manner, and rejected in all denominations (those determined to be not applicable to any denomination) ) If there is not one sheet and no erroneous identification, there is no need to correct the discrimination level, and the product can be shipped as it is. The discrimination level of the RAM 541 at this time is equal to the discrimination level of the ROM 540.

Next, a countermeasure according to the present invention when a reject occurs will be described.

For example, if 100 100-yen coins are passed and only one is rejected, the output of each identification element at this time is
It is stored in RAM541. After that, if the discriminating level is set to the correction mode and then a predetermined operation is performed, the discriminating level of the RAM 541 can be shifted up or down to be corrected.
In the present invention, in order to prevent misoperation, it is not possible to easily shift to the correction mode. That is, in order to shift to the correction mode, the power is once turned off (the data of rejected coins is held in the RAM 541 by the battery), and then the rotary switch RSW2 of the selection switch means 545 is set to the position of “E” ( RSW1 remains set to the “F” position that was set last time) and when the power switch is turned on while the push switch is being pressed, the correctable flag is set and correction is possible. After the correction is completed, turn off the power switch to set the correction permission flag,
After that, modification is prohibited. In the correction mode, the review identification as described above is prohibited.

Since 100 yen was rejected in the correction mode, from Fig. 21, after setting the rotary switch RSW1 to "8" and the rotary switch RSW2 to "2", press the push switch to correct the discrimination level to the device. Give instructions. When the operator instructs the device that an error has occurred with a denomination of 100 yen, the device determines that the discrimination level of 100 yen should be corrected. Now that the denomination has been designated, the output (outlier value) patterns of the four discriminant elements of the rejected coin are read from the RAM 541 and compared with the respective patterns of the four discriminant elements of the designated 100-yen coin. For example, if it is found that the diameter is D3, which is different from D2 of 100 yen, and the other three identification elements match 100 yen, the calculated value Pr of the diameter is read as 0.38 from the RAM 541 and 100 The upper limit (third discriminant level) of the discriminating level of the yen coin is "0.75", and the lower limit (second discriminating level) is "0.40", which is lower than the lower limit by "0.02".
The difference "-0.02" (+ when the upper limit is exceeded) is stored in the RAM 541 as a diameter error. The CPU 500 corrects the lower limit value "0.40" of the discriminating level of the diameter to the lower side by this difference "-.0.02". Regardless of the denomination, there are three types of correction pitches for the diameter discrimination level, ± 0.01, ± 0.04, ± 0.08. If the absolute value of the difference is S, 0.01 <S ≦ 0.05
If so, the pitch is 0.01, and if 0.05 <S ≦ 0.10, the pitch is 0.0
If 4,0.10 <S, the pitch is set to 0.08. Since the difference is “−0.02” now, the lower limit judgment level “0.40” is lowered by “−0.01” and the correction judgment level is “0”. .
39 ". It is judged whether or not this value exceeds the limit value separately set for each denomination, and if it exceeds, an error is displayed and the corrected determination level is not stored and updated in RAM 541. Within the limit value If so, the discrimination level is newly stored in the RAM 541 as the lower limit of 100 yen, and the correction ends for the moment.Here, it is the standard discrimination level that the correction pitch is smaller than the actual difference value. This is to try to reduce the difference between the coins. When coins pass the passage surface, they jump lightly due to dust, etc., and the output value changes slightly (although the amount of change is considered small). This is because it is dangerous to change the discrimination level at all due to such a cause, and if the difference is extremely large, an error message may be displayed and correction cannot be made. Press again the same 100 yen The test is confirmed by passing 100 coins, and if all are passed, the discrimination level of 100 yen is OK.The above test may be repeated depending on the difference value and the discrimination level may be gradually corrected. In the above example, if the difference is just "0.01", it cannot be corrected, but it may be possible to provide a separate dip switch etc. to correct it. There are three types of pitches, regardless of denomination, such as ± 0.01V, ± 0.04V, ± 0.08V.
It is the same as above that one of the pitches is selected and the discrimination level is corrected according to the value of the difference.

As for the holes, the constants K1 (0.2) of the thresholds S + and S- for pulsing are corrected by, for example, ± 0.1.

Next, if one 500 yen coin is misidentified as a 100 yen coin, set the rotary switch RSW1 to "9" and the rotary switch RSW2 to "2" and press the push switch.
The data of the misidentified coin is read from the 100 yen memory of the identification element memory provided for each denomination, compared with the 500 yen pattern, and the data for the different identification element is further read from the RAM 541 to determine the discrimination level of 500 yen. The discriminant level is corrected by a predetermined amount based on the difference of (1), and after the correction, the discriminant level is identified and confirmed again (in this case, the detected output cannot be stored in the abnormal value memory unlike the reject).

As shown in FIG. 21, when the rotary illi RSW1 is set to "C" to "F", various kinds of information can be displayed on the display 546 including an LED or the like. For example, when the rotary switch RSW1 is set to "D", the actual discrimination level of each discriminating element can be displayed, so that a service person on the market can also confirm each discrimination level of the device. When the rotary switch RSW1 is set to "D" and the rotary switch RSW2 is set to "4", the diameter discrimination level is displayed. At this time, the order of the plurality of discrimination levels is also displayed. As the push switch is pushed, the number of levels changes sequentially, and the discrimination level at that time is displayed.

Also, if the rotary switch RSW1 is set to "E" and RSW2 is set to "0" when one 100 yen is rejected, the data "2 (A
2), 0 (no hole) 4 (C4), 3 (D3) ”is displayed, and if you compare it with the standard data of 100 yen, you can see that the element of the 4th diameter is displaced, so at the time of rejecting Rotary switch
Instead of setting RSW1 to "8" and RSW2 to "2", set the rotary switch RSW2 to "B" and RSW2 to "0" and press the push switch to indicate that the diameter element is misaligned. The discriminating level of the diameter can be modified. In this case, since the denomination is not specified in the flowchart,
The denomination 100 yen is first discriminated from three discriminating elements other than the diameter, the discrimination level of the diameter 100 yen is compared with the diameter data “0.38” of the abnormal value memory, and the difference “−0.02” is stored,
After that, the discrimination level is corrected in the same manner as described above, and is stored and updated in the RAM 541. Rotary switch RS
Set W1 to "E" and rotary switch RSW2 to "1".
When set to "4", an abnormal value can be displayed. Further, when the rotary switch RSW1 is set to "F" and the rotary switch RSW2 is set to "1" to "4", it is possible to display the value of the coin that has passed last except the reject. When the rotary switch RS1 is set to "E" and RS2 is set to "2", the pattern at the time of rejection is displayed, for example, as shown in FIG. 22 in the example of FIG.

The data of reject coin may be only the last one,
You may memorize plural sheets and take the average value. However, in the case of averaging, it is necessary to clear all data after the correction operation. Although the material, the presence / absence of the hole, and the determination of the diameter have been described individually, the sampling is common. By adding these three determination conditions, more reliable coin identification can be achieved.

(Effects of the Invention) As described above, according to the present invention, it is possible to increase the passing rate by a simple adjustment, and identify all kinds of coins, whether they are true or false, regardless of variations in parts, adjustment errors of adjusters, and the like. Therefore, it is possible to achieve inexpensive and reliable identification of an object with a simple configuration without causing misjudgment due to dust or dust.

In addition, if a reject coin is generated during the running test before shipment, the discrimination level is corrected and the correction discrimination level is updated only when the correction value is within the limit value. Has the advantage that it is not updated and stored.

[Brief description of drawings]

1 is a block diagram showing the configuration of the present invention, FIG. 2 is a flow chart showing an example of the operation of the present invention, FIG. 3 is a diagram showing an example of the structure of a sensor used in the present invention, FIG. 4 is its exploded view, 5 (A) to 5 (C) are diagrams for explaining the shape of the core used in this sensor, FIGS. 6 (A) and 6 (B) are diagrams for explaining the detection principle, and FIG. The block diagram which shows the example which applied the sensor to the coin classifier, FIG.8 and FIG.9 is the figure for demonstrating the operation | movement, FIG.10 is the structural drawing of the sensor for identifying the denomination of coins, etc., Figure 11 (A) ~
(C), FIGS. 12 (A) to (C) and FIG. 14 (A) to
(C) is a diagram for explaining the operation, FIG. 13 is a flowchart showing an operation example, FIGS. 14 to 17 are diagrams for explaining the operation of the sensor used in the present invention, and FIG. 18 is an operation. FIG. 19 is a flow chart showing an example, FIG. 19 is a diagram for explaining coin identification, and FIGS. 20 to 22 are diagrams for explaining the operation of the present invention. 100 …… Sensor, 103 …… Primary core, 106,107 …… Secondary core, 105,108,109 …… Secondary coil, 200 …… Sensor, 420
...... Coins, 500 ...... CPU, 540 ...... ROM, 541 ...... RAM, 542
…… Addition / subtraction circuit, 543 …… A / D converter.

 ─────────────────────────────────────────────────── ─── Continuation of the front page (56) Reference JP-A-60-65392 (JP, A) JP-A-53-75998 (JP, A) JP-A-58-172120 (JP, A)

Claims (2)

[Claims] 1. A detection means (100, 200) for detecting an identification element of a coin (420), and a discrimination level composed of an upper limit value and a lower limit value for determining pass / fail for each identification element in advance. The discriminant level storing means (540, 541) to be stored, and the discriminant level composed of the outputs of the detecting means (100, 200) and the upper limit value and the lower limit value are compared for each discriminant element, and the discriminant is judged. Abnormal value storage means (541) for storing the detection power of coins (420) outside the level area, and discrimination level correction instructing means (instruction given by the operator when it is necessary to correct the upper limit value or the lower limit value of the discrimination level). 545) and the correction level is instructed by the determination level correction instruction means (545), the upper limit value or the lower limit value of the determination level previously stored in the determination level storage means (540, 541) is stored in the abnormal value storage. Based on the stored contents of the means (541) Correctly, when the upper limit value or the lower limit value of the corrected discrimination level is within the limit value set for the denomination, the discrimination level correction means (500, 54
0, 541) and a coin discriminating apparatus. 2. A method of correcting the discrimination level by the discrimination level correcting means in a stepwise manner corresponding to the difference between the stored contents of the abnormal value storage means and the discrimination level of the discrimination level storage means. The coin discriminating device according to the first paragraph.