JPH0668789B2 - Coin sorter - Google Patents
Coin sorterInfo
- Publication number
- JPH0668789B2 JPH0668789B2 JP61280830A JP28083086A JPH0668789B2 JP H0668789 B2 JPH0668789 B2 JP H0668789B2 JP 61280830 A JP61280830 A JP 61280830A JP 28083086 A JP28083086 A JP 28083086A JP H0668789 B2 JPH0668789 B2 JP H0668789B2
- Authority
- JP
- Japan
- Prior art keywords
- coin
- limit value
- output
- differential amplifier
- circuit
- Prior art date
- Legal status (The legal status is an assumption and is not a legal conclusion. Google has not performed a legal analysis and makes no representation as to the accuracy of the status listed.)
- Expired - Fee Related
Links
Classifications
-
- G—PHYSICS
- G07—CHECKING-DEVICES
- G07D—HANDLING OF COINS OR VALUABLE PAPERS, e.g. TESTING, SORTING BY DENOMINATIONS, COUNTING, DISPENSING, CHANGING OR DEPOSITING
- G07D5/00—Testing specially adapted to determine the identity or genuineness of coins, e.g. for segregating coins which are unacceptable or alien to a currency
- G07D5/02—Testing the dimensions, e.g. thickness, diameter; Testing the deformation
Description
【発明の詳細な説明】 ［産業上の利用分野］ 本発明は、硬貨の正偽を判定する硬貨選別装置に関す
る。Description: [Industrial field of use] The present invention relates to a coin sorting device for determining the authenticity of coins.
［従来の技術］ 一般に硬貨選別装置として硬貨通路にコイルセンサを設
け硬貨が通過する時のコイルセンサのインピーダンス変
化を検出して硬貨の正偽を判定する装置が知られてい
る。[Prior Art] Generally, as a coin sorting device, there is known a device in which a coil sensor is provided in a coin passage to detect a change in impedance of the coil sensor when the coin passes and to determine whether the coin is true or false.
第３図は従来この種の硬貨選別装置における選別回路の
構成の一例を示す。FIG. 3 shows an example of the configuration of a sorting circuit in a coin sorting apparatus of this type conventionally.
第３図において、コイルセンサL1、固定コイルL2および
２つの抵抗Ｒによりブリッジ回路を構成し、発振器３よ
り硬貨選別に適した周波数の正弦波が供給されている。In FIG. 3, a coil sensor L1, a fixed coil L2, and two resistors R form a bridge circuit, and a sine wave having a frequency suitable for coin selection is supplied from an oscillator 3.
コイルL2の値はコイルL1の硬貨がないときの値とするこ
とで硬貨がコイルL1にないとき電圧V1−電圧V2は零とな
る。電圧V1−電圧V2の電圧差は差動増幅回路4,整流回路
５を通して、比較回路６に入力している。このような構
成における硬貨１がコイルセンサL1を通過する時のイン
ピーダンス変化を第４図に示す。By setting the value of the coil L2 to the value when there is no coin in the coil L1, the voltage V 1 −the voltage V 2 becomes zero when there is no coin in the coil L1. The voltage difference between the voltage V 1 and the voltage V 2 is input to the comparison circuit 6 through the differential amplifier circuit 4 and the rectifier circuit 5. FIG. 4 shows the impedance change when the coin 1 having such a structure passes through the coil sensor L1.
第４図において、硬貨１がコイルセンサL1にない時をＯ
点、硬貨A,B,Cを投入した時の最大変化点を、それぞ
れ、A,B,C点で示す。なお、硬貨A,B,Cはそれぞれ外径，
材質，厚さなどが異なる正貨とする。またＡ′は偽貨の
最大変化点を示す。In Fig. 4, when coin 1 is not in coil sensor L1,
Points, the maximum change points when coins A, B, C are thrown in are indicated by points A, B, C, respectively. The coins A, B, C have the outer diameter,
It is a genuine coin with different materials and thickness. A'denotes the maximum change point of the fake coin.
次に硬貨A,B,Cを投入した時の整流回路５の出力電圧V3
の変化を第５図に示す。この電圧V3が所定の範囲内にあ
るかどうかにより比較回路6,アンド回路７で硬貨１の判
定を行っている。Next, output voltage V 3 of the rectifier circuit 5 when coins A, B, C are inserted
FIG. 5 shows the changes in the above. The coin 1 is determined by the comparison circuit 6 and the AND circuit 7 depending on whether this voltage V 3 is within a predetermined range.
［発明が解決しようとする問題点］ ところが上述の従来の硬貨選別回路では、たとえば第４
図に示すようにた偽貨の最大変化点Ａ′と真貨の最大変
化点Ａに位置するときはＯ点からのインピーダンス差が
ほぼ同じ値となるため硬貨Ａと偽貨Ａ′とは区別がつか
ない欠点があった。[Problems to be Solved by the Invention] However, in the above-described conventional coin sorting circuit, for example, the fourth coin
As shown in the figure, when the maximum change point A'of the false coin and the maximum change point A of the true coin are located, the impedance difference from the O point becomes almost the same value, and therefore the coin A and the false coin A'are distinguished. There was a shortcoming that it was hard to hit.
本発明は、上述の点に鑑み、第４図のＯ点の外にＯ′点
からみたコイルセンサのインピーダンス変化の大きさを
検出し、Ｏ点からみたインピーダンス変化の大きさ（O
A,OA′の長さ）がほぼ同じである硬貨Ａ（金種Ａの正
貨）と偽貨Ａ′とを、Ｏ′からみたインピーダンス変化
の大きさ（Ｏ′A,O′Ａ′の長さ）により判別できるよ
うにした硬貨選別装置を提供することを目的とする。In view of the above points, the present invention detects the magnitude of the impedance change of the coil sensor viewed from the point O ′ in addition to the point O of FIG.
A coin A (a true coin of denomination A) and a counterfeit coin A ′ having substantially the same length (A, OA ′) and the magnitude of impedance change (O′A, O′A ′) when viewed from O ′ An object of the present invention is to provide a coin sorting device which can be discriminated by length.
［問題点を解決するための手段］ 本発明は、上述の目的を達成するため、硬貨通路（２）
を通過する硬貨の特性に応じてインピーダンスが変化す
るコイルセンサ（L1）と、該コイルセンサを一辺とする
第１のブリッジ回路（L1,R1,L2,R2）と、前記コイルセ
ンサを該第１のブリッジ回路と共通の一辺とし、前記硬
貨通路に硬貨がないときに第１のブリッジ回路とは異な
る値の出力を発生する第２のブリッジ回路（L1,R1,L
2′,R2′）と、前記第１のブリッジ回路の出力を検出す
る第１の差動増幅回路（４）と、前記第２のブリッジ回
路の出力を検出する第２の差動増幅回路（４′）と、前
記第１の差動増幅回路の出力（V3）と選別すべき硬貨の
金種別の上限値（VA＋,VB＋,VC＋）および下限値（VA
−,VB−,VC−）とを比較して第１の差動増幅回路の出力
が上限値および下限値の間にあるか否かを金種別に比較
判定する第１の比較判定手段（6,7A,7B,7C）と、前記第
２の差動増幅回路の出力（V3′）と選別すべき硬貨の金
種別の上限値（VA＋′,VB＋′,VC＋′）および下限値
（VA−′,VB−′,VC−′）とを比較して第２の差動増幅
回路の出力が上限値および下限値の間にあるか否かを金
種別に比較判定する第２の比較判定手段（６′,7A′,7
B′,7C′）と、前記第１および第２の比較判定手段の比
較結果に基づいて対応する金種の比較結果が共に上限値
および下限値の間にあるか否かを金種別に判定すること
により前記硬貨通路を通過する硬貨の真偽を判別する真
偽判別手段（8A,8B,8C）とを備えることを特徴としてい
る。[Means for Solving Problems] In order to achieve the above object, the present invention provides a coin passage (2).
A coil sensor (L1) whose impedance changes according to the characteristics of a coin passing through the first, a first bridge circuit (L1, R1, L2, R2) having the coil sensor as one side, and the coil sensor having the first Second bridge circuit (L1, R1, L) that has one side common to the bridge circuit and generates an output of a value different from that of the first bridge circuit when there is no coin in the coin passage.
2 ', R2'), a first differential amplifier circuit (4) for detecting the output of the first bridge circuit, and a second differential amplifier circuit (4) for detecting the output of the second bridge circuit ( 4 '), the output (V3) of the first differential amplifier circuit, and the upper limit value (VA +, VB +, VC +) and the lower limit value (VA +) of the coin type to be selected.
-, VB-, VC-) to determine whether the output of the first differential amplifier circuit is between the upper limit value and the lower limit value for each denomination. , 7A, 7B, 7C), the output (V3 ') of the second differential amplifier circuit, and the upper limit (VA +', VB + ', VC +') and lower limit (VA-) of the coin type of the coin to be selected. ′, VB− ′, VC− ′) to determine whether or not the output of the second differential amplifier circuit is between the upper limit value and the lower limit value for each denomination. (6 ', 7A', 7
B ', 7C') and the comparison results of the corresponding denominations based on the comparison results of the first and second comparison / determination means, and it is determined for each denomination whether the comparison results of the corresponding denominations are both between the upper limit value and the lower limit value. By doing so, it is characterized by comprising authenticity determining means (8A, 8B, 8C) for determining the authenticity of coins passing through the coin passage.
［作 用］ 本発明においては、第１のブリッジ回路および第１の差
動増幅回路が第４図のＯ点からみたコイルセンサのイン
ピーダンス変化の大きさ（OA,OA′の長さ）を検出する
ものであり、第２のブリッジ回路および第２の差動増幅
回路がＯ′点からみたインピーダンス変化の大きさ
（Ｏ′A,O′Ａ′の長さ）を検出するものである。そし
て、その大きさ（第１および第２の差動増幅回路の出
力）は、それぞれが上限値および下限値の間にあるか否
かを第１および第２の比較判定手段により比較判定され
るので、Ｏ点からみたインピーダンス変化の大きさ（第
１の差動増幅回路の出力）がほぼ同じで共に上限値（VA
＋）および下限値（VA−）の間の値をとる硬貨Ａ（金種
Ａの正貨）と偽貨Ａ′とは、Ｏ′からみたインピーダン
ス変化の大きさ（第２の差動増幅回路の出力）が、硬貨
Ａは上限値（VA＋′）および下限値（VA−′）の間の値
をとるが、偽貨Ａ′はその範囲外となるので、真偽判別
手段により判別することができる。なお、この判別は、
金種別に行われ、他の金種についても同様である。[Operation] In the present invention, the first bridge circuit and the first differential amplifier circuit detect the magnitude of the impedance change (length of OA, OA ') of the coil sensor viewed from the point O in FIG. The second bridge circuit and the second differential amplifier circuit detect the magnitude of the impedance change (length of O'A, O'A ') viewed from the point O'. Then, the magnitudes (outputs of the first and second differential amplifier circuits) are compared and determined by the first and second comparison and determination means whether or not they are between the upper limit value and the lower limit value, respectively. Therefore, the magnitude of the impedance change (output of the first differential amplifier circuit) seen from the point O is almost the same, and both are the upper limit value (VA
+) And the lower limit value (VA−), the coin A (the true coin of the denomination A) and the false coin A ′ are the magnitude of the impedance change viewed from O ′ (the second differential amplifier circuit). Output), the coin A takes a value between the upper limit value (VA + ′) and the lower limit value (VA− ′), but the counterfeit coin A ′ is out of the range. You can In addition, this determination is
This is done for each denomination, and the same applies to other denominations.
［実施例］ 第１図は本発明実施例における構成の一例を示す。[Embodiment] FIG. 1 shows an example of a configuration in an embodiment of the present invention.
第１のブリッジ回路は、コイルセンサL1、固定コイルL
2,抵抗R1,R2で構成し、第２のブリッジ回路をコイルセ
ンサL1,固定コイルL2′および抵抗R1,R2′で構成してい
る。このブリッジ回路には発振器３より正弦波が供給さ
れている。The first bridge circuit is a coil sensor L1, a fixed coil L
2, the resistors R1 and R2, and the second bridge circuit includes the coil sensor L1, the fixed coil L2 ', and the resistors R1 and R2'. The bridge circuit is supplied with a sine wave from the oscillator 3.
コイルL2の値はコイルセンサL1に硬貨が無いときの値す
なわち第４図におけるＯ点に相当する値に設定し、コイ
ルL2′の値はコイルL2より下の値すなわち第４図でＯ′
点に相当する値とする。電圧差V1−V2は差動増幅回路４
を通り、整流回路５を通って電圧V3となり比較回路６に
入力し、金種別の上下限電圧値（硬貨Ａの場合VA＋,VA
−、硬貨Ｂの場合VB＋,VB−、硬貨Ｃの場合VC＋,VC−）
と比較される。The value of the coil L2 is set to the value when there is no coin in the coil sensor L1, that is, the value corresponding to the point O in FIG. 4, and the value of the coil L2 ′ is lower than the coil L2, that is, O ′ in FIG.
The value corresponds to the point. The voltage difference V 1 −V 2 is the differential amplifier circuit 4
Through the rectifier circuit 5 and becomes the voltage V 3 which is input to the comparison circuit 6 and the upper and lower limit voltage values of the gold type (V A +, V A for coin A).
−, For coin B V B +, V B −, for coin C V C +, V C −)
Compared to.
第２のブリッジ回路からの出力電圧V1−V2′は差動増幅
回路４′を通り、整流回路５′を通って電圧V3′となり
比較回路６′に入力し、金種別の上下限値（硬貨Ａ場合
VA＋′,VA−′、硬貨Ｂの場合VB＋′,VB−′、硬貨Ｃの
場合VC＋′,VC−′）と比較される。硬貨Ａおよび偽貨
Ａ′を投入したときのV3′の電圧変化を第２図に示す。The output voltage V 1 -V 2 ′ from the second bridge circuit passes through the differential amplifier circuit 4 ′, the rectifier circuit 5 ′, and becomes the voltage V 3 ′, which is input to the comparison circuit 6 ′ and the upper and lower limits of the denomination. Value (for coin A
V A + ', V A - ', if the coin B V B + ', V B -', if the coin C V C + ', V C -') to be compared. FIG. 2 shows the voltage change of V 3 ′ when coin A and counterfeit coin A ′ are inserted.
第２図において、硬貨Ａと偽貨Ａ′では第４図における
位置Ｏ′からの距離が異なるため電圧V3′のピーク値は
異なる。このため硬貨Ａはピーク値がVA＋′とVA−′の
間となりアンド回路7A′の出力は“1"となる。In FIG. 2, since the coin A and the counterfeit coin A ′ have different distances from the position O ′ in FIG. 4, the peak value of the voltage V 3 ′ is different. Therefore, the coin A has a peak value between V A + 'and V A- ', and the output of the AND circuit 7A 'becomes "1".
偽貨Ａ′はこの範囲とならず、アンド回路7A′の出力は
“1"とならない。これは、第１のブリッジ回路からの出
力電圧が真貨のときの出力電圧とほぼ同じでも、偽貨に
おける第２のブリッジ回路からの出力電圧は真貨におけ
る電圧変化より大となるからである。また、この逆も起
るが、これらのアンド回路7A,7A′の出力を入力するア
ンド回路8Aの出力により、この種の偽貨を正貨と確実に
区別することができ、選別精度を高くすることができ
る。The counterfeit coin A ′ does not fall within this range, and the output of the AND circuit 7A ′ does not become “1”. This is because even if the output voltage from the first bridge circuit is almost the same as the output voltage when the coin is true, the output voltage from the second bridge circuit in the false coin is larger than the voltage change in the true coin. . Also, the reverse occurs, but the output of the AND circuit 8A, which inputs the outputs of these AND circuits 7A and 7A ′, makes it possible to reliably distinguish this kind of counterfeit coin from the true coin, and the sorting accuracy is high. can do.
［発明の効果］ 以上のような本発明によれば、コイルセンサを一辺とす
る第１のブリッジ回路と、そのコイルセンサを第１のブ
リッジ回路と共通の一辺とし、硬貨通路に硬貨がないと
きに第１のブリッジ回路とは異なる値の出力を発生する
第２のブリッジ回路とを設け、第１および第２のブリッ
ジ回路の出力が、それぞれ金種別の上限値および下限値
の間にあるか否かを比較判定することにより、第１のブ
リッジ回路だけでは判別することができない偽貨を第２
のブリッジ回路の出力により判別できるようにしたの
で、センサを追加することなく硬貨の選別精度を向上す
ることができる。[Effects of the Invention] According to the present invention as described above, when there is no coin in the coin passage, the first bridge circuit having the coil sensor as one side and the coil sensor as one side common to the first bridge circuit A second bridge circuit that generates an output of a value different from that of the first bridge circuit, and whether the outputs of the first and second bridge circuits are between the upper limit value and the lower limit value of the denomination, respectively. By comparing and determining whether or not the second counterfeit coin cannot be discriminated only by the first bridge circuit,
Since the discrimination can be made based on the output of the bridge circuit, the coin sorting accuracy can be improved without adding a sensor.
第１図は本発明実施例における構成の一例を示すブロッ
ク図、 第２図は本発明実施例における電圧変化を示す説明図、 第３図は従来例における構成の一例を示すブロック図、 第４図は従来例におけるインピーダンス変化を示す説明
図、 第５図は従来例における電圧変化を示す説明図である。 １……硬貨、 ２……硬貨通路、 ３……発振器、 4,4′……差動増幅回路、 5,5′……整流回路、 6,6′……比較回路、 7A〜7C,7A′〜7C′,8A〜8C……アンド回路。FIG. 1 is a block diagram showing an example of a configuration in an embodiment of the present invention, FIG. 2 is an explanatory diagram showing a voltage change in an embodiment of the present invention, FIG. 3 is a block diagram showing an example of a configuration in a conventional example, and FIG. FIG. 5 is an explanatory diagram showing impedance changes in the conventional example, and FIG. 5 is an explanatory diagram showing voltage changes in the conventional example. 1 ... Coin, 2 ... Coin passage, 3 ... Oscillator, 4,4 '... Differential amplifier circuit, 5,5' ... Rectifier circuit, 6,6 '... Comparison circuit, 7A to 7C, 7A ′ 〜7C ′, 8A〜8C …… and circuit.
Claims (1)
じてインピーダンスが変化するコイルセンサ（L1）と、
該コイルセンサを一辺とする第１のブリッジ回路（L1,R
1,L2,R2）と、前記コイルセンサを該第１のブリッジ回
路と共通の一辺とし、前記硬貨通路に硬貨がないときに
第１のブリッジ回路とは異なる値の出力を発生する第２
のブリッジ回路（L1,R1,L2′,R2′）と、前記第１のブ
リッジ回路の出力を検出する第１の差動増幅回路（４）
と、前記第２のブリッジ回路の出力を検出する第２の差
動増幅回路（４′）と、前記第１の差動増幅回路の出力
（V3）と選別すべき硬貨の金種別の上限値（VA＋,VB＋,
VC＋）および下限値（VA−,VB−,VC−）とを比較して第
１の差動増幅回路の出力が上限値および下限値の間にあ
るか否かを金種別に比較判定する第１の比較判定手段
（6,7A,7B,7C）と、前記第２の差動増幅回路の出力（V
3′）と選別すべき硬貨の金種別の上限値（VA＋′,VB
＋′,VC＋′）および下限値（VA−′,VB−′,VC−′）
とを比較して第２の差動増幅回路の出力が上限値および
下限値の間にあるか否かを金種別に比較判定する第２の
比較判定手段（６′,7A′,7B′,7C′）と、前記第１お
よび第２の比較判定手段の比較結果に基づいて対応する
金種の比較結果が共に上限値および下限値の間にあるか
否かを金種別に判定することにより前記硬貨通路を通過
する硬貨の真偽を判別する真偽判別手段（8A,8B,8C）と
を備えることを特徴とする硬貨選別装置。1. A coil sensor (L1) whose impedance changes according to the characteristics of a coin passing through a coin passage (2),
A first bridge circuit (L1, R1) having the coil sensor as one side
1, L2, R2) and the coil sensor have one side common to the first bridge circuit and generate an output of a value different from that of the first bridge circuit when there is no coin in the coin passage.
Bridge circuit (L1, R1, L2 ', R2') and a first differential amplifier circuit (4) for detecting the output of the first bridge circuit.
And a second differential amplifier circuit (4 ') for detecting the output of the second bridge circuit, an output (V3) of the first differential amplifier circuit, and an upper limit value of the denomination of coins to be selected. (VA +, VB +,
VC +) and the lower limit value (VA-, VB-, VC-) are compared to determine whether the output of the first differential amplifier circuit is between the upper limit value and the lower limit value by the denomination. 1 comparison / determination means (6, 7A, 7B, 7C) and the output of the second differential amplifier circuit (V
3 ') and the upper limit of the type of coins to be sorted (VA +', VB
+ ', VC +') and lower limit (VA-', VB-', VC- ')
The second comparison and determination means (6 ', 7A', 7B ', 6', 7A ', 7B', which determines whether or not the output of the second differential amplifier circuit is between the upper limit value and the lower limit value by comparing 7C ') and whether or not the comparison results of the corresponding denominations are both between the upper limit value and the lower limit value based on the comparison results of the first and second comparison determination means by the denomination. A coin sorting device comprising: a genuine / counterfeit discriminating unit (8A, 8B, 8C) for discriminating the authenticity of coins passing through the coin passage.
Priority Applications (3)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| JP61280830A JPH0668789B2 (en) | 1986-11-27 | 1986-11-27 | Coin sorter |
| KR1019870008389A KR930011725B1 (en) | 1986-11-27 | 1987-07-31 | Coin selection device |
| AU79942/87A AU595942B2 (en) | 1986-11-27 | 1987-10-20 | Coin selecting apparatus |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| JP61280830A JPH0668789B2 (en) | 1986-11-27 | 1986-11-27 | Coin sorter |
Publications (2)
| Publication Number | Publication Date |
|---|---|
| JPS63136188A JPS63136188A (en) | 1988-06-08 |
| JPH0668789B2 true JPH0668789B2 (en) | 1994-08-31 |
Family
ID=17630578
Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| JP61280830A Expired - Fee Related JPH0668789B2 (en) | 1986-11-27 | 1986-11-27 | Coin sorter |
Country Status (3)
| Country | Link |
|---|---|
| JP (1) | JPH0668789B2 (en) |
| KR (1) | KR930011725B1 (en) |
| AU (1) | AU595942B2 (en) |
Families Citing this family (2)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| JPH049656Y2 (en) * | 1986-12-01 | 1992-03-10 | ||
| JPH01226093A (en) * | 1988-03-07 | 1989-09-08 | Mitsubishi Heavy Ind Ltd | Coin discriminating device |
Family Cites Families (3)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| JPS5958595A (en) * | 1982-09-28 | 1984-04-04 | 富士電機株式会社 | Coin selector |
| JPS5958594A (en) * | 1982-09-28 | 1984-04-04 | 富士電機株式会社 | Coin selector |
| JPH049656Y2 (en) * | 1986-12-01 | 1992-03-10 |
-
1986
- 1986-11-27 JP JP61280830A patent/JPH0668789B2/en not_active Expired - Fee Related
-
1987
- 1987-07-31 KR KR1019870008389A patent/KR930011725B1/en not_active IP Right Cessation
- 1987-10-20 AU AU79942/87A patent/AU595942B2/en not_active Ceased
Also Published As
| Publication number | Publication date |
|---|---|
| KR880006629A (en) | 1988-07-23 |
| AU595942B2 (en) | 1990-04-12 |
| JPS63136188A (en) | 1988-06-08 |
| KR930011725B1 (en) | 1993-12-18 |
| AU7994287A (en) | 1988-06-09 |
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Legal Events
| Date | Code | Title | Description |
|---|---|---|---|
| R250 | Receipt of annual fees |
Free format text: JAPANESE INTERMEDIATE CODE: R250 |
|
| LAPS | Cancellation because of no payment of annual fees |