JPS6244375Y2 - - Google Patents
Info
- Publication number
- JPS6244375Y2 JPS6244375Y2 JP9236381U JP9236381U JPS6244375Y2 JP S6244375 Y2 JPS6244375 Y2 JP S6244375Y2 JP 9236381 U JP9236381 U JP 9236381U JP 9236381 U JP9236381 U JP 9236381U JP S6244375 Y2 JPS6244375 Y2 JP S6244375Y2
- Authority
- JP
- Japan
- Prior art keywords
- light
- signal
- circuit
- light source
- processing 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
Links
- 238000001514 detection method Methods 0.000 claims description 23
- 238000013139 quantization Methods 0.000 claims description 20
- 239000000126 substance Substances 0.000 claims description 8
- 230000003321 amplification Effects 0.000 claims description 6
- 238000003199 nucleic acid amplification method Methods 0.000 claims description 6
- 238000009434 installation Methods 0.000 claims 1
- 230000005284 excitation Effects 0.000 description 12
- 230000003287 optical effect Effects 0.000 description 4
- 230000000694 effects Effects 0.000 description 3
- 239000011521 glass Substances 0.000 description 2
- 238000003384 imaging method Methods 0.000 description 2
- 238000000034 method Methods 0.000 description 2
- 230000006866 deterioration Effects 0.000 description 1
- 238000010586 diagram Methods 0.000 description 1
- 239000000428 dust Substances 0.000 description 1
- 239000000463 material Substances 0.000 description 1
- 238000012986 modification Methods 0.000 description 1
- 230000004048 modification Effects 0.000 description 1
- 230000035945 sensitivity Effects 0.000 description 1
- 230000000087 stabilizing effect Effects 0.000 description 1
Landscapes
- Investigating, Analyzing Materials By Fluorescence Or Luminescence (AREA)
- Sorting Of Articles (AREA)
- Optical Radar Systems And Details Thereof (AREA)
Description
【考案の詳細な説明】
本考案は、紙葉類の検出装置に係り、特に検出
の安定化を向上した紙葉類の検出装置に関する。[0001] The present invention relates to a paper sheet detector, and more particularly to a paper sheet detector with improved detection stability.
従来、紙葉類の検出装置として紙葉類に付与さ
れた螢光体を螢光体の検出装置において、検出の
安定化をはかるために励起光の変化を被検出物の
受光素子とは異なる受光素子で検出し上記被検出
物の受光素子の受光回路の増幅度を制御し、出力
を安定させる方式や、励起光の変化に応じて受光
回路の2値化回路のスレツシユホールドレベルを
変える方式が考案されている。これらは励起光や
受光素子の変化およびほこり等の影響等を含めた
ループで較正していないので検出に不安定な要素
が含まれていた。 Conventionally, in a paper sheet detection device, a fluorescent substance attached to a paper sheet is used to detect changes in excitation light that are different from those of the light receiving element of the object to be detected in order to stabilize detection. Detects the object with a light receiving element, controls the amplification degree of the light receiving circuit of the light receiving element of the object to be detected, and changes the threshold level of the binarization circuit of the light receiving circuit according to the method of stabilizing the output and the change in excitation light. A method has been devised. Since these were not calibrated in a loop that took into account changes in the excitation light and light-receiving element, as well as the effects of dust, etc., detection included unstable elements.
本考案は上記事情にもとづいてなされたもので
比較的簡単な構成で検出装置全体の較正を可能に
し、安定した検出が可能となる紙葉類の検出装置
を提供することを目的とする。 The present invention was developed based on the above-mentioned circumstances, and an object of the present invention is to provide a paper sheet detection device that enables calibration of the entire detection device with a relatively simple configuration and enables stable detection.
以下、本考案を螢光物質を含む切手が貼られた
書状の検出装置に応用した図示の一実施例を参照
しながら説明する。 DETAILED DESCRIPTION OF THE PREFERRED EMBODIMENTS The present invention will be described below with reference to an illustrated embodiment in which the present invention is applied to a detection device for a letter affixed with a stamp containing a fluorescent substance.
第1図において1は螢光物質を含んでいる切手
2が貼付された書状であり、この書状1は図示し
ない搬送ベルトによつて図中矢印方向に搬送され
るものである。4は紫外線ランプからなる励起光
源4からの紫外線が切手2に照射されることによ
り切手2の螢光物質が励起発光するようになつて
いる。しかして切手2からの励起光は防塵用ガラ
スを兼ねた検出窓を3を通過し、結像レンズ5に
よつてスリツト板8上に結像され、フイルター9
を介して受光器10に導びかれる。なお、スリツ
ト板8には切手のサイズに合わせたスリツトが刻
まれており、フイルタ9は切手2に含まれる螢光
物質の発光色に合わせた色ガラスフイルタで構成
されている。また7は受光器10へ外部光が入射
するのを防ぐ遮光部である。 In FIG. 1, reference numeral 1 denotes a letter to which a stamp 2 containing a fluorescent substance is affixed, and this letter 1 is conveyed in the direction of the arrow in the figure by a conveyor belt (not shown). The stamp 2 is irradiated with ultraviolet light from an excitation light source 4 comprising an ultraviolet lamp, so that the fluorescent substance of the stamp 2 is excited to emit light. The excitation light from the stamp 2 passes through the detection window 3 which also serves as a dust-proof glass, is focused on the slit plate 8 by the imaging lens 5, and is filtered through the filter 9.
The light is guided to the light receiver 10 via. The slit plate 8 has slits made to match the size of the stamp, and the filter 9 is a glass filter with a color matching the color of the fluorescent material contained in the stamp 2. Further, 7 is a light shielding part that prevents external light from entering the light receiver 10.
一方、搬送路をはさんで受光器10と対向する
位置には基準体としての螢光チユーブ6が設けら
れており、書状1がこの光学系内にないときは励
起光源4からの紫外線によりこの螢光チユーブ6
が励起発光し、その励起光が受光器10に入射す
るようになつている。さらに15および16はそ
れぞれランプおよび受光素子からなる検知器で、
光学系部分を被検出物である書状1が通過中であ
るか否かを検出するものである。 On the other hand, a fluorescent tube 6 as a reference body is provided at a position facing the light receiver 10 across the conveyance path. Fluorescent tube 6
emits excitation light, and the excitation light enters the light receiver 10. Furthermore, 15 and 16 are detectors each consisting of a lamp and a light receiving element,
This detects whether the letter 1, which is an object to be detected, is passing through the optical system section.
次に第2図に示す信号処理回路について説明す
ると、受光器10で光電変換された出力信号は増
幅器11で増幅された後、量子化回路14に加え
られるとともにゲート回路12にも印加される。
このゲート回路12は後述するゲート制御回路1
8の出力によつて切換えられるもので増幅器11
の出力信号を信号保持回路13に選択的に供給す
るものである。したして信号保持回路13の出力
信号は量子化回路14に加えられ増幅器11の量
子化レベル信号すなわちスライスレベルとして使
われる。 Next, the signal processing circuit shown in FIG. 2 will be described. The output signal photoelectrically converted by the photoreceiver 10 is amplified by the amplifier 11 and then applied to the quantization circuit 14 and also to the gate circuit 12.
This gate circuit 12 is a gate control circuit 1 which will be described later.
The amplifier 11 is switched by the output of the amplifier 11.
The output signal is selectively supplied to the signal holding circuit 13. Thus, the output signal of the signal holding circuit 13 is applied to the quantization circuit 14 and used as a quantization level signal of the amplifier 11, that is, a slice level.
一方、受光素子16の出力信号は増幅器17で
増幅されゲート制御回路18に印加され、光学系
部分を書状1が通過中はゲート禁止信号をゲート
回路12に印加するとともに書状が通過中は量子
化回路14へ検出許可信号として供給されるよう
になつている。 On the other hand, the output signal of the light receiving element 16 is amplified by an amplifier 17 and applied to a gate control circuit 18, which applies a gate inhibit signal to the gate circuit 12 while the letter 1 is passing through the optical system portion, and also supplies a detection enable signal to the quantization circuit 14 while the letter is passing through.
次にこの回路の作用を説明すると、書状1が光
学系部分を通過中でないときは励起光源4からの
紫外線は螢光チユーブ6を照射するので螢光チユ
ーブ6からの励起光は検出窓3、結像レンズ5、
スリツト板8、フイルタ9をそれぞれ介して受光
器10に入射される。しかして受光器10で光電
変換された信号は増幅器11で増幅されて量子化
回路14に印加されるとともにゲート回路12に
も印加される。ここでゲート制御回路18からは
検出許可信号が出ていないので量子化回路14は
出力を出さず、ゲート禁止信号も出ていないので
増幅器11の出力信号は信号保持回路13へ印加
されることとなる。信号保持回路13では増幅器
11からの信号を保持するとともに分圧するなど
して量子化回路14へ量子化レベル信号を出力し
ている。この状態で書状1が搬送されてくると受
光素子16は書状1が通過中であることを検知
し、ゲート制御回路18からゲート禁止信号およ
び検出許可信号をゲート回路12および量子化回
路14へ出力する。一方励起光源4からの紫外線
は切手2に照射されるので、切手2に含まれた螢
光物質が励起発光するので、この励起光は検出窓
3、結像レンズ5、スリツト板8およびフイルタ
9を介して受光器10に入射する。そして受光器
10で光電変換された出力信号は増幅器11を介
して量子化回路14に印加され、書状が到達前に
保持されていた信号保持回路13の出力信号を量
子化レベルとして量子化され、切手の有無等を検
出されるものである。なお、このときゲート回路
12はゲート禁止信号が印加されているので増幅
器11の出力信号を信号保持回路13に印加する
ことはなく、信号保持回路13は書状到達前の値
を保持し続ける。さらに書状1が通過し終ると前
述同様基準体としての螢光チユーブ6からの励起
光で信号が信号保持回路13で保持されることと
なる。 Next, to explain the operation of this circuit, when the letter 1 is not passing through the optical system section, the ultraviolet rays from the excitation light source 4 irradiate the fluorescent tube 6, so the excitation light from the fluorescent tube 6 passes through the detection window 3, imaging lens 5,
The light enters the light receiver 10 via the slit plate 8 and filter 9, respectively. The signal photoelectrically converted by the photodetector 10 is amplified by the amplifier 11 and applied to the quantization circuit 14 and also to the gate circuit 12. Here, since the detection permission signal is not output from the gate control circuit 18, the quantization circuit 14 does not output an output, and since the gate prohibition signal is not output, the output signal of the amplifier 11 is applied to the signal holding circuit 13. Become. The signal holding circuit 13 holds the signal from the amplifier 11, divides the signal, and outputs a quantization level signal to the quantization circuit 14. When the letter 1 is conveyed in this state, the light receiving element 16 detects that the letter 1 is passing, and the gate control circuit 18 outputs a gate prohibition signal and a detection permission signal to the gate circuit 12 and the quantization circuit 14. do. On the other hand, since the ultraviolet rays from the excitation light source 4 are irradiated onto the stamp 2, the fluorescent substance contained in the stamp 2 is excited and emitted light. The light enters the light receiver 10 via the light beam. The output signal photoelectrically converted by the photoreceiver 10 is applied to the quantization circuit 14 via the amplifier 11, and is quantized using the output signal of the signal holding circuit 13, which was held before the letter arrived, as the quantization level. The presence or absence of stamps is detected. At this time, since the gate inhibit signal is applied to the gate circuit 12, the output signal of the amplifier 11 is not applied to the signal holding circuit 13, and the signal holding circuit 13 continues to hold the value before the letter arrives. Further, when the letter 1 has passed, the signal is held in the signal holding circuit 13 by the excitation light from the fluorescent tube 6 serving as a reference body, as described above.
以上のように本実施例によれば基準体の励起光
を測定しておき、この基準に基づいて量子化レベ
ルを決定しているので光源、受光器、増幅器等の
劣化等により減度が変化したとしても安定した検
出が行えるものである。 As described above, according to this embodiment, the excitation light of the reference body is measured and the quantization level is determined based on this reference, so the attenuation changes due to deterioration of the light source, receiver, amplifier, etc. Even so, stable detection can be performed.
なお、前述した実施例においては基準体からの
受光出力により、量子化回路の量子化レベルを制
御するようにしたが、第3図のように増幅器の増
幅度を制御するようにしても同様の効果が得られ
る。 In the above-mentioned embodiment, the quantization level of the quantization circuit was controlled by the light output from the reference body, but the same effect can be achieved even if the amplification degree of the amplifier is controlled as shown in FIG. Effects can be obtained.
すなわち、受光器10の光電変換された出力信
号は増幅幅度の可変な増幅器11に印加されると
ともに増幅された信号は量子化回路14およびゲ
ート回路12に印加される。しかしてゲート回路
12の出力は比較回路22において基準レベル発
生器21からの基準レベルと比較され、差がある
ときはその差信号を信号保持回路23に印加する
ようになつており、この信号保持回路23からの
信号によつて増幅器11の増幅度が制御され、基
準体からの受光出力が常に基準レベル発生器21
からの基準レベルと等しくなるように増幅度が制
御されるものである。なお18はゲート制御回路
で前述の実施例同様のものである。 That is, the photoelectrically converted output signal of the photoreceiver 10 is applied to an amplifier 11 whose amplification width is variable, and the amplified signal is applied to a quantization circuit 14 and a gate circuit 12. The output of the gate circuit 12 is compared with the reference level from the reference level generator 21 in the comparator circuit 22, and if there is a difference, the difference signal is applied to the signal holding circuit 23, which holds the signal. The amplification degree of the amplifier 11 is controlled by the signal from the circuit 23, and the received light output from the reference body is always output to the reference level generator 21.
The degree of amplification is controlled so that it is equal to the reference level from . Note that 18 is a gate control circuit similar to that of the previous embodiment.
また、本実施例において基準レベル発生器から
の基準レベルを量子化回路の量子化レベルと関連
づけておけば量子化回路の特性変化をも補償でき
る。 Further, in this embodiment, by associating the reference level from the reference level generator with the quantization level of the quantization circuit, it is possible to compensate for changes in the characteristics of the quantization circuit.
なお、これらの実施例においては切手に含まれ
る螢光物質の検出についてのみ説明したが、本考
案はこれに限定されるものではなくリン光、可視
光でもよく、また被検出物も紙葉類以外にも応用
でき要は本考案の要旨を脱しない範囲で種々変形
実施可能なことはもちろんである。 In addition, in these examples, only the detection of fluorescent substances contained in stamps was explained, but the present invention is not limited to this, and phosphorescence or visible light may be used, and the detection object may also be paper sheets. It goes without saying that the present invention can be applied to other applications and various modifications can be made without departing from the gist of the present invention.
以上説明したように本考案によれば、受光器と
対向して基準体を配置し、この基準体からの受光
出力によつて信号処理回路を制御するようにした
ので、光源、受光器、増幅器を含む装置全体の感
度等が変化しても常に安定した検出ののできる紙
葉類の検出装置を提供できるものである。 As explained above, according to the present invention, the reference body is placed opposite the light receiver, and the signal processing circuit is controlled by the light output from the reference body, so that the light source, the light receiver, the amplifier It is possible to provide a paper sheet detection device that can always perform stable detection even if the sensitivity of the entire device including the device changes.
図は本考案の実施例を示すもので、第1図は光
学系の配置を示す平面図、第2図は信号処理回路
を示すブロツク図、第3図は信号処理回路の他の
実施例を示すブロツク図である。
1……書状、2……切手、4……光源、6……
基準体(螢光チユーブ)、10……受光器、11
……増幅器、14……量子化回路、13,23…
…信号保持回路、12……ゲート回路、18……
ゲート制御回路。
The figures show an embodiment of the present invention. Fig. 1 is a plan view showing the arrangement of the optical system, Fig. 2 is a block diagram showing the signal processing circuit, and Fig. 3 shows another embodiment of the signal processing circuit. FIG. 1...Letter, 2...Stamp, 4...Light source, 6...
Reference body (fluorescent tube), 10... Light receiver, 11
...Amplifier, 14...Quantization circuit, 13, 23...
...Signal holding circuit, 12...Gate circuit, 18...
Gate control circuit.
Claims (1)
搬送される前記紙葉類を照射する光源と、この
光源から放射され前記紙葉類で反射した光を受
光する受光器と、この受光器と前記搬送路をは
さみ対向し前記光源の光により照射される位置
に配置された基準体と、この基準体を前記光源
で照射して前記受光器で得られる基準信号を保
持する保持手段と、この保持手段で保持された
基準信号と前記紙葉類で反射した光の信号とが
入力され処理する信号処理回路と、前記搬送路
中に設けられた前記光源および受光器の設置場
所に紙葉類が搬送されたことを検知する検知器
と、この検知器の検知に応じて前記受光器の出
力信号を前記保持手段へ選択的に供給する切換
え手段とを有することを特徴とする紙葉類の検
出装置。 (2) 前記光源は紫外線発生ランプで構成し、基準
体として蛍光物質を配置することにより信号処
理回路は紙葉類に付与された蛍光物質を検出す
るようにした実用新案登録請求の範囲第1項記
載の紙葉類の検出装置。 (3) 信号処理回路が前期基準信号で増幅度を制御
するように構成した実用新案登録請求の範囲第
1項または第2項記載の紙葉類の検出装置。 (4) 信号処理回路が前記基準信号で量子化レベル
を制御するように構成した実用新案登録請求の
範囲第1項または第2項記載の紙葉類の検出装
置。[Claims for Utility Model Registration] (1) A conveyance path for conveying paper sheets, a light source that irradiates the paper sheets conveyed on this conveyance path, and light emitted from this light source and reflected by the paper sheets. a light receiver that receives light; a reference body that faces the light receiver across the conveyance path and is disposed at a position to be irradiated with the light of the light source; a holding means for holding the obtained reference signal; a signal processing circuit for inputting and processing the reference signal held by the holding means and the light signal reflected by the paper sheet; and a signal processing circuit provided in the conveyance path. a detector for detecting that paper sheets have been conveyed to the installation location of the light source and the light receiver; and a switching means for selectively supplying an output signal of the light receiver to the holding means in response to detection by the detector. A paper sheet detection device comprising: (2) The light source is constituted by an ultraviolet generating lamp, and a fluorescent substance is arranged as a reference body, so that the signal processing circuit detects the fluorescent substance applied to the paper sheet. Claim 1 Detection device for paper sheets as described in Section 1. (3) The paper sheet detection device according to claim 1 or 2 of the utility model registration claim, wherein the signal processing circuit is configured to control the degree of amplification using the reference signal. (4) The paper sheet detection device according to claim 1 or 2, wherein the signal processing circuit is configured to control the quantization level using the reference signal.
Priority Applications (1)
Application Number | Priority Date | Filing Date | Title |
---|---|---|---|
JP9236381U JPS6244375Y2 (en) | 1981-06-24 | 1981-06-24 |
Applications Claiming Priority (1)
Application Number | Priority Date | Filing Date | Title |
---|---|---|---|
JP9236381U JPS6244375Y2 (en) | 1981-06-24 | 1981-06-24 |
Publications (2)
Publication Number | Publication Date |
---|---|
JPS57205080U JPS57205080U (en) | 1982-12-27 |
JPS6244375Y2 true JPS6244375Y2 (en) | 1987-11-21 |
Family
ID=29887399
Family Applications (1)
Application Number | Title | Priority Date | Filing Date |
---|---|---|---|
JP9236381U Expired JPS6244375Y2 (en) | 1981-06-24 | 1981-06-24 |
Country Status (1)
Country | Link |
---|---|
JP (1) | JPS6244375Y2 (en) |
Families Citing this family (1)
Publication number | Priority date | Publication date | Assignee | Title |
---|---|---|---|---|
JP2010060524A (en) * | 2008-09-05 | 2010-03-18 | Toshiba Corp | Fluorescence/phosphorescence detection device |
-
1981
- 1981-06-24 JP JP9236381U patent/JPS6244375Y2/ja not_active Expired
Also Published As
Publication number | Publication date |
---|---|
JPS57205080U (en) | 1982-12-27 |
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