JPH0580713B2 - - Google Patents

Description

DETAILED DESCRIPTION OF THE INVENTION [Field of Industrial Application] The present invention relates to an electronic coin sorting device that sorts a plurality of coins using a coin sorting sensor such as an electromagnetic coil.

[Conventional technology]

In an electronic hardening sorting device that sorts coins using a conventional coin sorting sensor, when a coin inserted from a coin slot passes through a coin sorting sensor, a detection signal emitted from this coin sorting sensor and a computer memory are stored in advance. When the peak value of the detection signal is between the maximum allowable value and the minimum allowable value of the stored value, it is determined that the coin is genuine.

[Problem that the invention seeks to solve]

However, with this method, the detection sensitivity of the sorting sensor changes over time during use in the market, or as a countermeasure against certain counterfeit coins being accepted. When it is desired to change the range value, it is necessary to take the trouble to change the contents stored in the memory of the computer, which is extremely inconvenient in terms of maintenance.

SUMMARY OF THE INVENTION An object of the present invention is to provide an electronic coin sorting device that eliminates the above-mentioned disadvantages and allows the coin acceptance width value to be easily changed by changing simple parts.

[Means for solving problems]

In order to achieve the above object, the present invention provides a coin sorting sensor section that detects the characteristics of hard coins passing through a coin path and outputs a detection signal thereof, and a coin sorting sensor section that detects the characteristics of hard coins passing through a coin passage and outputs a detection signal thereof, and a coin sorting sensor section that detects the characteristics of a hard coin passing through a coin path and outputs a detection signal thereof, and a coin sorting sensor section that detects the characteristics of a hard coin passing through a coin path and outputs a detection signal thereof. In a coin sorting device, the average value of the inspection standard values of the genuine coins to be sorted is stored and retained, and the coin sorting device is equipped with a comparison means for digitally comparing whether or not the coins are within the range of the upper limit value and the lower limit value of the standard value. A genuine coin inspection standard average value storage means consisting of a digital memory, a tolerance range setting resistor for setting the tolerance range from the average value of the inspection standard value, and a resistor corresponding to the resistance value via the tolerance width setting resistor. It includes an A-D converter that inputs an analog voltage value, converts it into a digital voltage value, and outputs it, and an upper limit value and a lower limit value of the inspection reference value based on the digital voltage value and an average value of the inspection reference value. and specie tolerance setting means for calculating and setting a specie tolerance range.

[Effect]

Hereinafter, the operation of the present invention will be explained with reference to FIG. 1, which shows the above-mentioned structure of the present invention. In FIG. 1, a specie inspection standard average value storage means 2 stores average values of characteristics of a plurality of coins.

Further, the allowable width setting resistor 4 sets the allowable width of each of the plurality of coins, and the specie allowable range value setting means 6 performs, for example, addition/subtraction processing based on this allowable width and the average value. Set tolerance values.

The signal emitted from the coin sorting sensor section 10 when a coin passes and the signal emitted from the genuine coin tolerance value setting means 6 are compared by the comparing means 8, and the signal from the coin sorting sensor is When the peak value of the signal is within the specie tolerance range, it is determined that the coin is genuine.

By the way, when changing this specie tolerance range, it is sufficient to simply replace the tolerance width setting resistor with one with a resistance value that represents the desired tolerance width, and there is no need to specially change the memory contents. , maintenance is extremely easy.

〔Example〕

Embodiments of the present invention will be described below with reference to the accompanying drawings.

FIG. 2 is a block diagram showing one embodiment of the present invention, and FIG. 3 is a diagram showing the arrangement of the sorting sensor.

In FIG. 2, 10 is a coin sorting sensor section, an electromagnetic pick-up 11, an inductance 1
2. It has a detection circuit composed of a resistor 13 and a resistor 14, an oscillator 15, a differential amplifier 16, and a rectifier circuit 17, and via an A-D converter 18,
A digital value is input to a comparator, which will be described later.

Reference numeral 20 indicates a control circuit composed of a microcomputer or the like, and reference numeral 21 indicates a memory in which control procedures and average values of characteristics of a plurality of coins, such as V1, V2, and V3, are stored.

22 is a reference resistor, 23 to 25 are tolerance width setting resistors for setting the tolerance width, and the control circuit 2
Externally attached to 0.

Reference numeral 26 denotes an A-D converter for converting, for example, VA, VB, and VC into digital values into divided voltage values of the allowable width setting resistors 23, 24, and 25.

27 and 28 are a first comparator and a second comparator, respectively.

The operation of the embodiment of the present invention having the above configuration will be explained.

As shown in Figure 3, a certain coin is placed on the guide rail 2.
When passing through the electromagnetic pickup 11 along the line 9, a pickup signal V0 is output, and the differential amplifier 16,
The peak value is input to a first comparator 27 and a second comparator 28 via a rectifier circuit 17 and an A-D converter 18 .

The control circuit 20 uses the average values V1, V2, and V3 of the genuine coin inspection reference values stored in the memory 21, and the partial voltages of the tolerance width setting resistors 23, 24, 25, and the reference resistor 22, respectively. Tolerance width value determined
Specie tolerances are set for various coins from VA, VB, and VC.

For example, for coin A, V1 is retrieved from the memory 21 as the average value of the inspection standard values of genuine coins, and in accordance with this, the allowable width setting resistor 23 is made conductive to allow the output of the A-D converter 26. By obtaining the width VA and performing addition and subtraction processing on it in the control circuit 20, V1 is set as the upper limit value.
+VA, and V1-VA is obtained as the lower limit value.

Similarly, for coin B, the upper limit value V2+
For VB and lower limit V2-VB, and coin C,
Upper limit value V3+VC and lower limit value V3-VC are obtained.

These upper limit values are sequentially sent to the first comparator 27, and the lower limit values are sent to the second comparator 28.

Therefore, in the first comparator 27 and the second comparator 28, the above-mentioned pickup signal
The peak value of V0, upper limit value and lower limit value are compared, and as shown in Fig. 4, for example, the upper limit value V2 + VB
If a peak value exists between the lower limit value V2 and VB, it is determined that the coin B is a genuine coin.

By the way, in order to prevent the acceptance of counterfeit coins, if you want to make the above-mentioned allowable range narrower and perform strict judgment, for example, in the case of coin B, the external allowable range setting resistor 24 can be set to a predetermined value. You can replace it with one. In the case of coin C, allowable width setting resistance 2
It becomes 5.

〔Effect of the invention〕

As is clear from the above description, according to the present invention, the average value of the characteristics of each coin is stored in a digital memory, and the allowable range is set by a resistor.
Changes in the acceptance range of each coin can be handled by changing the resistance constant, which is extremely advantageous in terms of maintenance.

In addition, the amount of memory stored in the memory is only the average value, which is half that of the conventional method that stores both the upper and lower limit values.
The time required to input data into memory is halved, which is advantageous in terms of production.

[Brief explanation of the drawing]

FIG. 1 is a block diagram of the present invention, FIG. 2 is a block diagram showing an embodiment of the present invention, and FIG. 3 is a diagram showing the arrangement of an electromagnetic pickup as a sorting sensor.
FIG. 4 is a diagram illustrating the range of genuine currency determination. 2... Genie inspection standard average value storage means, 4... Tolerance width setting resistor, 6... Genie tolerance range value setting means,
8... Comparison means, 10... Coin sorting sensor section, 2
0...Control circuit, 21...Memory, 23, 24,
25... Allowable width setting resistance, 18, 26... A-D
Converter, 27, 28... comparator.

Claims (1)

[Claims] 1. A coin sorting sensor section that detects the characteristics of coins passing through a coin passage and outputs a detection signal thereof, and a peak value of the detection signal that is within the upper and lower limit values of the inspection standard values for genuine coins to be sorted. A coin sorting device comprising comparison means for digitally comparing whether or not the genuine coins are present in the coin sorting device, the coin sorting device comprising: a genuine coin inspection standard average value storage comprising a digital memory that stores and holds an average value of the inspection standard values of the genuine coins to be sorted; means, a tolerance range setting resistor for setting the tolerance range from the average value of the inspection reference value, and an analog voltage value corresponding to the resistance value inputted through the tolerance range setting resistor, and then converted into a digital voltage. A specie tolerance range value that includes an A-D converter that converts into a value and outputs it, and calculates and sets the upper and lower limits of the inspection reference value based on the digital voltage value and the average value of the inspection reference value. A coin sorting device comprising a setting means.