JP2994126B2 - Double feed detection device - Google Patents
Double feed detection deviceInfo
- Publication number
- JP2994126B2 JP2994126B2 JP4004478A JP447892A JP2994126B2 JP 2994126 B2 JP2994126 B2 JP 2994126B2 JP 4004478 A JP4004478 A JP 4004478A JP 447892 A JP447892 A JP 447892A JP 2994126 B2 JP2994126 B2 JP 2994126B2
- Authority
- JP
- Japan
- Prior art keywords
- output voltage
- sensor
- paper
- light
- light receiving
- 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
Description
【０００１】[0001]
【産業上の利用分野】本発明は光学的文字読取装置等の
読取部に帳票（又は原稿）を送り込む際に、帳票を誤っ
て複数枚送り込んでしまったことを検出するダブルフィ
−ド検出装置に関する。BACKGROUND OF THE INVENTION 1. Field of the Invention The present invention relates to a double-feed detecting apparatus for detecting that a plurality of forms have been erroneously fed when a form (or manuscript) is sent to a reading section such as an optical character reading apparatus. .
【０００２】[0002]
【従来の技術】従来この種のダブルフィ−ド検出装置は
例えば図４に示すように読取部を構成するＣＣＤ２の上
流側に設けられたセンサ３の出力電圧レベルを監視し
て、ストッカ４内の帳票１００が前記ＣＣＤ２方向へ１
枚だけ送り込まれたのか、或いは複数枚送り込まれたの
かを検出する装置である。尚、センサ３は発光素子３１
と受光素子３２から成り、発光素子３１から照射された
光を受光素子３２が受光し、その時得られる受光素子の
電圧を出力電圧としている。図５はこの従来のダブルフ
ィ−ド検出装置の動作原理を示した図である。この図の
横軸は紙厚を示し、縦軸はセンサ３の出力電圧レベルを
示している。図に示す如くセンサ３の間を通過する帳票
の紙厚が所定値以下になると、イに示す如くセンサ３の
出力電圧レベルは飽和状態になる。当初、例えば７０Ｋ
ｇ紙の１枚目の帳票を前記サンサ３の間に送り込んで、
発光素子３１から受光素子３２に入射される光を遮る
と、センサ３の出力電圧レベルは図５のＶF のレベルに
なるので、これを基準値として記憶し、この基準値ＶF
を中心に上、下に（ＶF ＋Δ）、（ＶF −Δ）で囲まれ
る範囲をダブルフィ−ド検出範囲に設定する。その後、
帳票を送り込んだ時のセンサ３の出力電圧が前記ＶF ±
Δの範囲に入っている場合には、１枚の帳票が正常に送
り込まれたと判定し、前記ＶF ±Δの範囲外であった場
合は、２枚以上の帳票が送り込まれたか、或いは所定の
紙厚に満たない帳票が送り込まれたと判定する。2. Description of the Related Art Conventionally, this type of double-feed detector monitors the output voltage level of a sensor 3 provided on the upstream side of a CCD 2 constituting a reading section as shown in FIG. The form 100 is 1 in the CCD2 direction.
This is a device that detects whether only one sheet has been fed or a plurality of sheets have been fed. The sensor 3 is a light emitting element 31
And the light receiving element 32. The light emitted from the light emitting element 31 is received by the light receiving element 32, and the voltage of the light receiving element obtained at that time is used as the output voltage. FIG. 5 is a diagram showing the operation principle of this conventional double feed detecting device. The horizontal axis of this figure indicates the paper thickness, and the vertical axis indicates the output voltage level of the sensor 3. When the paper thickness of the form passing between the sensors 3 becomes less than a predetermined value as shown in the figure, the output voltage level of the sensor 3 becomes saturated as shown in FIG. Initially, for example, 70K
Send the first sheet of g-paper between the sensors 3
Obstructing the light incident on the light-receiving element 32 from the light-emitting element 31, the output voltage level of the sensor 3 is on the level of V F of FIG. 5, which is stored as a reference value, the reference value V F
Set to de detection range - above, below (V F + Δ) mainly, Daburufi a range surrounded by (V F -Δ). afterwards,
When the form is sent, the output voltage of the sensor 3 is V F ±
If it is in the range of Δ, it is determined that one form has been normally sent, and if it is out of the range of V F ± Δ, two or more forms have been sent or It is determined that a form less than the paper thickness of the sheet has been sent.
【０００３】ところで、上記したセンサ３の発光素子３
１は経時変化により光量が落ちてしまい、その結果セン
サ３の感度が初期状態とは異なったものになる。このよ
うな場合には、図６で示す如く初期特性ロに対して感度
が落ちた経時変化後の特性はハとなり、初期特性ではダ
ブルフィ−ド検出範囲の基準点がＶF であったものが、
経時変化後はＶ´F になって、ニに示す如くダブルフィ
−ド検出範囲にずれてしまう。このような状態では、あ
る紙厚の帳票を１枚送っても２枚送っても同じ出力電圧
になってしまうことがあり、精度よく帳票のダブルフィ
−ドを検出することができなくなるという欠点が生じ
る。従って、従来のダブルフィ−ド検出装置で上記のよ
うな経時変化が生じた場合再調整を必要とし、メインテ
ナンスに人手がかかるという欠点があった。しかも、上
記従来のダブルフィ−ド検出装置では、前記基準値ＶF
を得るために、当初１枚の帳票をセンサ３の間に送くり
込むが、この時に複数枚の帳票が送り込まれてしまう
と、前記ＶF として異常値が設定されてしまい、それ以
降のダブルフィ−ド検出が正常に行えなくなるという欠
点があった。The light emitting element 3 of the sensor 3
In the case of No. 1, the amount of light decreases due to aging, and as a result, the sensitivity of the sensor 3 becomes different from the initial state. In such a case, the characteristics after aging sensitivity fell relative to the initial characteristic B as shown in FIG. 6 becomes C, the initial characteristics Daburufi - those reference points de detection range was V F ,
After aging, taken V'F, Daburufi as shown in a two - shifted to de detection range. In such a state, the output voltage may be the same regardless of whether one sheet of paper of a certain thickness is sent or two sheets of paper, and the double feed of the form cannot be detected accurately. Occurs. Therefore, when the above-mentioned change over time occurs in the conventional double-feed detecting device, readjustment is required, and there is a disadvantage that maintenance is labor-intensive. Moreover, in the conventional double-feed detecting device, the reference value VF
To obtain, but a single form initially Komu Chestnut fed between the sensor 3, the form of a plurality at this time will be sent, the V F will outliers is set as, later Daburufi There is a disadvantage that the normal detection cannot be performed.
【０００４】[0004]
【発明が解決しようとする課題】上記の如く従来のダブ
ルフィ−ド検出装置では、経時変化によりセンサの感度
が変化してしまうと、帳票や原稿のダブルフィ−ドを検
出する検出範囲がずれてしまい、帳票の厚みによっては
正常にダブルフィ−ドを検出することができなくなると
いう欠点があった。このため、上記のような経時変化が
生じた場合は、装置のメインテナンスを行って再調整を
しなければならず、これに人手がかかるという欠点があ
った。又、上記従来のダブルフィ−ド検出装置は当初セ
ンサ部に帳票を１枚送ってダブルフィ−ド検出範囲の基
準値を求める必要があるが、この時、帳票が複数枚送ら
れてしまうと、前記基準値として異常値が設定されてし
まい、以降の検出動作が正常に行なわれなくなってしま
うという欠点があった。As described above, in the conventional double-feed detecting device, if the sensitivity of the sensor changes due to aging, the detection range for detecting the double-feed of a document or a document is shifted. However, there is a disadvantage that double feed cannot be normally detected depending on the thickness of the form. For this reason, when such a temporal change occurs, it is necessary to perform maintenance of the apparatus and readjust it, which has a drawback that it takes time and labor. In the conventional double-feed detecting device, it is necessary to first send one form to the sensor unit to obtain a reference value of the double-feed detection range. At this time, if a plurality of forms are sent, There is a drawback that an abnormal value is set as the reference value, and the subsequent detection operation cannot be performed normally.
【０００５】そこで本発明は上記の欠点を除去するもの
で、帳票（又は原稿）の複数枚の取り込みを検出する検
出用センサの経時的な感度変化に起因する検出範囲のず
れを自動的に補正して、常に前記センサの感度に対応し
た検出範囲に基づいて帳票のダブルフィ−ドを精度よく
検出することができるダブルフィ−ド検出装置を提供す
ることを目的としている。Accordingly, the present invention eliminates the above-mentioned drawbacks, and automatically corrects a shift in a detection range due to a change in sensitivity over time of a detection sensor for detecting the capture of a plurality of forms (or manuscripts). It is another object of the present invention to provide a double-feed detecting device capable of always accurately detecting a double-feed of a form based on a detection range corresponding to the sensitivity of the sensor.
【０００６】[0006]
【課題を解決するための手段】本発明に係るダブルフィ
ード検出装置は、発光部と受光部とからなり前記受光部
から出力電圧を出力するセンサと、このセンサの初期状
態時において、前記発光部と前記受光部の間に介在させ
る紙の厚みを変化させたときに、この変化に応じて前記
受光部から出力される出力電圧の変化を基準特性データ
として記憶すると共に、この基準特性データにおける前
記発光部と前記受光部の間に紙を介在させていない場合
に前記受光部から出力される出力電圧と前記発光部と前
記受光部の間に所定の厚みの紙を介在させた場合に前記
受光部から出力される出力電圧との比で求めた前記セン
サの透過率を記憶する第１の記憶手段と、電源投入時に
前記発光部と前記受光部の間に紙を介在させていない状
態で前記受光部から出力される出力電圧を検出する第１
の検出手段と、この第１の検出手段により検出された前
記出力電圧と前記透過率とに基づいて前記電源投入後の
時点において前記所定の厚みの紙を前記発光部と前記受
光部の間に紙を介在させた場合に前記受光部から出力さ
れるべき出力電圧を演算で求める第１の演算手段と、前
記第１の記憶手段に記憶されている基準特性データから
読み出した前記発光部と前記受光部の間に所定の厚みの
紙を介在させた場合の出力電圧と前記第１の演算手段で
求めた出力電圧との差分を補正値として求める第２の演
算手段と、前記基準特性データを前記補正値により補正
した補正後の基準特性データを記憶する第２の記憶手段
と、 前記センサの前記発光部と前記受光部の間に紙が送
り込まれた際に、前記受光部から出力される出力電圧と
前記補正後の基準特性データとに基づいて紙のダブルフ
ィードを検出する監視手段とを具備したことを特徴とす
る。 According to the present invention, there is provided a double feed detecting apparatus comprising a light emitting section and a light receiving section.
A sensor for outputting an output voltage from Oite to the initial state of the sensor, is interposed between the light emitting unit and the light receiving unit
When the thickness of the paper is changed,
Changes in the output voltage output from the light receiving section
As well as in the reference characteristic data
When no paper is interposed between the light emitting unit and the light receiving unit
The output voltage output from the light receiving unit and the light emitting unit
When paper of a predetermined thickness is interposed between the light
The sensor calculated from the ratio to the output voltage output from the light receiving unit
First storage means for storing the transmittance of the power supply;
No paper is interposed between the light emitting unit and the light receiving unit
Detecting an output voltage output from the light receiving unit in a first state
And detecting means, before detected by the first detection means
After the power-based serial output voltage and to said transmission
At this point, the paper having the predetermined thickness is
When paper is interposed between the optical parts,
The output voltage and a first arithmetic means for calculating the arithmetic to be, before
From the reference characteristic data stored in the first storage means.
A predetermined thickness between the read light emitting unit and the light receiving unit;
The output voltage when paper is interposed and the first arithmetic means
Second calculating means for obtaining a difference from the obtained output voltage as a correction value, and correcting the reference characteristic data with the correction value
Storage means for storing the corrected reference characteristic data
When the paper is fed between the light emitting unit and the light receiving unit of the sensor
Output voltage from the light-receiving unit when
Monitoring means for detecting a double feed of paper based on the corrected reference characteristic data .
You.
【０００７】[0007]
【作用】上記構成により、第１の記憶手段では、発光部
と受光部とからなり、前記受光部から出力電圧を出力す
るセンサと、の初期状態時において、前記発光部と前記
受光部の間に介在させる紙の厚みを変化させたときに、
この変化に応じて前記受光部から出力される出力電圧の
変化を基準特性データとして記憶されると共に、この基
準特性データにおける前記発光部と前記受光部の間に紙
を介在させていない場合に前記受光部から出力される出
力電圧と前記発光部と前記受光部の間に所定の厚みの紙
を介在させた場合に前記受光部から出力される出力電圧
との比で求めた前記センサの透過率が記憶され、 第１の
検出手段では、電源投入時に前記発光部と前記受光部の
間に紙を介在させていない状態で前記受光部から出力さ
れる出力電圧が検出され、 第１の演算手段では、この第
１の検出手段により検出された前記出力電圧と前記透過
率とに基づいて前記電源投入後の時点において前記所定
の厚みの紙を前記発光部と前記受光部の間に紙を介在さ
せた場合に前記受光部から出力されるべき出力電圧が演
算で求められ、 第２の演算手段では、前記第１の記憶手
段に記憶されている基準特性データから読み出した前記
発光部と前記受光部の間に所定の厚みの紙を介在させた
場合の出力電圧と前記第１の演算手段で求めた出力電圧
との差分が補正値として求められ、 第２の記憶手段で
は、前記基準特性データを前記補正値により補正した補
正後の基準特性データが記憶され、 監視手段では、前記
センサの前記発光部と前記受光部の間に紙が送り込まれ
た際に、前記受光部から出力される出力電圧と前記補正
後の基準特性データとに基づいて紙のダブルフィードが
検出される。 With the above structure, the first storage means includes a light emitting section.
And a light receiving section, and output an output voltage from the light receiving section.
In the initial state of the sensor, the light emitting unit and the
When changing the thickness of the paper interposed between the light receiving parts,
In response to this change, the output voltage output from the
The change is stored as reference characteristic data, and
Paper between the light emitting part and the light receiving part in the quasi-characteristic data
Output from the light receiving unit when no
Paper of a predetermined thickness between the power voltage and the light emitting unit and the light receiving unit
Output voltage output from the light receiving section when
And the transmittance of the sensor determined by the ratio of
In the detection means, when the power is turned on, the light emitting unit and the light receiving unit
Output from the light receiving section without paper
Output voltage is detected, and the first calculating means
The output voltage detected by the detecting means and the transmission voltage.
At the time after the power is turned on based on the
Paper with a thickness of between the light emitting part and the light receiving part
Output voltage to be output from the light receiving section when
In the second operation means, the first storage means
Read from the reference characteristic data stored in the row
Paper of a predetermined thickness was interposed between the light emitting unit and the light receiving unit
Output voltage and output voltage obtained by the first arithmetic means
Is obtained as a correction value, and is stored in the second storage unit.
Is a correction obtained by correcting the reference characteristic data with the correction value.
The post-correction reference characteristic data is stored, and the monitoring means
Paper is fed between the light emitting part and the light receiving part of the sensor.
The output voltage output from the light receiving unit and the correction
Double feed of paper is performed based on the reference characteristic data
Is detected.
【０００８】[0008]
【実施例】以下、本発明の一実施例を図面を参照して説
明する。図１は本発明のダブルフィ−ド検出装置の一実
施例を示したブロック図である。１１はセンサ３の感度
に応じてダブルフィ−ド検出範囲の補正値を演算する演
算部、１２はセンサ３の間に送込んだ帳票の紙厚とこの
センサ３の出力電圧との関係を示した基準特性をテ−ブ
ル化したデ−タ（基準特性データ）と、７０Ｋｇ紙の光
透過率μを格納しているＲＯＭ、１３はセンサ３の感度
に対応して前記ＲＯＭ１２に格納されている基準データ
テ−ブルを補正した新データテ−ブルを記憶するＳＲＡ
Ｍ、１４はセンサ３の出力電圧レベルを監視して、帳票
のダブルフィ−ドを検出する監視部、１５はダブルフィ
−ドがあったことを表示する表示部である。An embodiment of the present invention will be described below with reference to the drawings. FIG. 1 is a block diagram showing an embodiment of the double feed detecting device according to the present invention. Numeral 11 denotes a calculation unit for calculating a correction value of the double-feed detection range in accordance with the sensitivity of the sensor 3, and 12 denotes the relationship between the paper thickness of the form sent between the sensors 3 and the output voltage of the sensor 3. ROM storing data in which reference characteristics are tabulated (reference characteristic data) and light transmittance μ of 70 kg paper. Reference numeral 13 is a reference stored in ROM 12 corresponding to the sensitivity of sensor 3. SRA for storing a new data table with a corrected data table
M and 14 are monitoring units for monitoring the output voltage level of the sensor 3 to detect a double feed of a form, and 15 is a display unit for displaying the presence of a double feed.
【０００９】次に本実施例の動作について説明する。上
記センサ３の対紙厚に対する出力電圧特性は以下の
（１）式に示す如くほぼ１次の分数関数で表すことがで
きる。Ｙ＝ｃ／（Ｘ＋ａ）…（１） この（１）式に対
応する前記出力電圧特性は図３のＰに示す如くである。
ＲＯＭ１２には上記した（１）式で示される出力電圧特
性のデ−タテ−ブルが格納されている。又、上記図３の
Ｐで示した特性において、紙無し状態でのセンサ３の出
力レベルＡを求め、例えば７０Ｋｇ紙を前記センサ３に
通した状態でのこの出力レベルＢを求める。これによ
り、センサ３の透過率μがＢ／Ａの演算で求まり、この
透過率μを前記ＲＯＭ１２に記憶しておく。Next, the operation of this embodiment will be described. The output voltage characteristic of the sensor 3 with respect to the paper thickness can be represented by a substantially first-order fractional function as shown in the following equation (1). Y = c / (X + a) (1) The output voltage characteristic corresponding to the equation (1) is as shown by P in FIG.
The ROM 12 stores the data table of the output voltage characteristic shown by the above equation (1). Further, based on the characteristics indicated by P in FIG. 3, the output level A of the sensor 3 in a state where no paper is present is obtained. For example, the output level B in a state where 70 kg paper is passed through the sensor 3 is obtained. Thereby, the transmittance μ of the sensor 3 is obtained by the calculation of B / A, and this transmittance μ is stored in the ROM 12.
【００１０】装置への電源投入時、本例の演算部は図２
に示すようなフローチャートに従った補正動作を行う。
まず、ステップ２０１にて電源の投入待ちを行い、電源
が投入されるとステップ２０２に進んで、各部の初期化
を行った後、ステップ２０３に進む。ステップ２０３で
は、センサ３の紙無し状態での出力電圧Ａ´を監視部１
４を介して求め、これを保持した後、ステップ２０４へ
進む。ステップ２０４ではＲＯＭ１２内のセンサ３の透
過率μを読み出し、このμと前記出力電圧Ａ´の乗算を
行って、現在のセンサ３の感度に対応した７０Ｋｇ紙を
このセンサ３に通した場合に得られるはずの出力電圧Ｂ
´を推定算出する。但し、Ｂ´＝μＡ´の関係がある。
次にステップ２０５にて、ＲＯＭ１２内に格納されてデ
ータテーブルから前記センサ３の感度が初期状態であっ
た場合に７０Ｋｇ紙をこのセンサ３に通した時に得られ
る出力電圧Ｂを求め、このＢと前記Ｂ´との差ｂ、即
ち、ｂ＝Ｂ´−Ｂを算出し、これをステップ２０６に
て、ＲＯＭ１２内のデータテーブルに一律に加算して、
補正後の新データテーブルを算出し、これをＳＲＡＭ１
３に記憶させて、処理を終了する。When the power supply to the apparatus is turned on, the arithmetic unit of the present embodiment operates as shown in FIG.
The correction operation according to the flowchart shown in FIG.
First, in step 201, power-on wait is performed. When the power is turned on, the process proceeds to step 202, and after initializing each unit, the process proceeds to step 203. In step 203, the output voltage A ′ of the sensor 3 in the absence of paper is monitored by the monitoring unit 1.
4 and hold this, and then go to step 204. In step 204, the transmittance μ of the sensor 3 in the ROM 12 is read, and this μ is multiplied by the output voltage A ′ to obtain a value obtained when 70 kg paper corresponding to the current sensitivity of the sensor 3 is passed through the sensor 3. Output voltage B
Is estimated and calculated. However, there is a relationship of B ′ = μA ′.
Next, at step 205, the output voltage B obtained when 70 kg paper is passed through the sensor 3 when the sensitivity of the sensor 3 is in the initial state is obtained from the data table stored in the ROM 12 and The difference b from the above B ', that is, b = B'-B is calculated, and this is uniformly added to the data table in the ROM 12 in step 206, and
A new data table after correction is calculated, and
3 and the process ends.
【００１１】ここで、前記補正後の新データテーブルは
Ｙ＝ｃ／（Ｘ＋ａ）＋ｂ…（２）で示され、図３ではｑ
で示した特性線に相当する。尚、前記補正値ｂは図３の
Ｙ軸の漸近線として表される。その後、センサ３を通し
て帳票が送り込まれると、監視部１４はセンサ３から得
られる出力電圧をＳＲＡＭ１３に格納されている図３の
ｑで示した特性線（新データテーブルに同じ）に照らし
合わせて、１枚の帳票がセンサ３を通過したか、或いは
複数枚の帳票が通過したかを検出し、その結果を表示部
１５に表示する。Here, the new data table after the correction is represented by Y = c / (X + a) + b (2), and in FIG.
It corresponds to the characteristic line indicated by. The correction value b is represented as an asymptote on the Y axis in FIG. Thereafter, when the report is sent through the sensor 3, the monitoring unit 14 compares the output voltage obtained from the sensor 3 with the characteristic line (same as the new data table) indicated by q in FIG. It detects whether one form has passed the sensor 3 or whether a plurality of forms has passed, and displays the result on the display unit 15.
【００１２】本実施例によれば、装置への電源投入毎
に、その時のセンサ３の感度に応じた紙厚に対するセン
サ３の出力特性データテーブルを作成し、このデータテ
ーブルに基づいて、監視部１４は前記センサ３の出力電
圧を監視して帳票のダブルフィードを検出することがで
き、前記センサの経年変化による影響を受けずに、常に
精度の高いダブルフィード検出を行うことができる。従
って、前記センサの経年変化による検出誤差の是正調整
を行う必要がなくなり、メインテナンスフリーとして、
省力化を図ることができる。又、前記電源投入毎に、セ
ンサ３の現在の感度に応じた新出力特性データテーブル
を作成するが、前記Ｂ´を得る際に、帳票をセンサ３に
通す必要がないため、常に正常な新出力特性テーブルデ
ータを得ることができ、装置の信頼性を向上させること
ができる。尚、本発明のダブルフィ−ド検出装置は光学
的文字読取装置だけでなく原稿等を読取部等に送り込む
あらゆる装置に搭載でき、同様の効果を得ることができ
る。According to this embodiment, each time the power is turned on to the apparatus, an output characteristic data table of the sensor 3 for the paper thickness corresponding to the sensitivity of the sensor 3 at that time is created, and the monitoring unit is generated based on the data table. The monitor 14 can detect the double feed of the form by monitoring the output voltage of the sensor 3, and can always perform highly accurate double feed detection without being affected by the aging of the sensor. Therefore, there is no need to perform correction adjustment of the detection error due to aging of the sensor, and as maintenance-free,
Labor saving can be achieved. Also, every time the power is turned on, a new output characteristic data table corresponding to the current sensitivity of the sensor 3 is created. Output characteristic table data can be obtained, and the reliability of the device can be improved. The double feed detecting device of the present invention can be mounted not only on an optical character reading device but also on any device for feeding a document or the like to a reading portion or the like, and the same effect can be obtained.
【００１３】[0013]
【発明の効果】以上記述した如く本発明のダブルフィ−
ド検出装置によれば、帳票（又は原稿）の複数枚の取り
込みを検出する検出用センサの経時的な感度変化に起因
する検出範囲のずれを自動的に補正して、常に前記セン
サの感度に対応した検出範囲に基づいて帳票のダブルフ
ィ−ドを精度よく検出することができる。As described above, the double field of the present invention is used.
According to the detection device, the deviation of the detection range due to the change in sensitivity over time of the detection sensor that detects the capture of a plurality of forms (or manuscripts) is automatically corrected, and the sensitivity of the sensor is always improved. The double feed of the form can be detected with high accuracy based on the corresponding detection range.
【図１】本発明のダブルフィ−ド検出装置の一実施例を
示したブロック図。FIG. 1 is a block diagram showing one embodiment of a double feed detection device of the present invention.
【図２】図１に示した装置の検出基準データの補正動作
を示したフローチャート。FIG. 2 is a flowchart showing a correction operation of detection reference data of the apparatus shown in FIG.
【図３】図１に示したセンサの紙厚に対する出力電圧特
性を示した特性図。FIG. 3 is a characteristic diagram showing output voltage characteristics with respect to paper thickness of the sensor shown in FIG.
【図４】従来のダブルフィード検出装置のセンサ部分の
配置例を示した図。FIG. 4 is a diagram showing an arrangement example of a sensor portion of a conventional double feed detecting device.
【図５】従来のダブルフィ−ド検出装置の動作原理を説
明する図。FIG. 5 is a view for explaining the operation principle of a conventional double feed detection device.
【図６】従来のダブルフィ−ド検出装置の経年変化によ
る不具合発生の原因を説明する図。FIG. 6 is a view for explaining the cause of the occurrence of a failure due to aging of the conventional double feed detection device.
３…センサ １１…演算部 １２…ＲＯＭ １３…ＳＲＡＭ １４…監視部 １５…表示部 DESCRIPTION OF SYMBOLS 3 ... Sensor 11 ... Operation part 12 ... ROM 13 ... SRAM 14 ... Monitoring part 15 ... Display part
───────────────────────────────────────────────────── フロントページの続き (56)参考文献 特開 昭56−82989（ＪＰ，Ａ) (58)調査した分野(Int.Cl.6，ＤＢ名) G06K 13/067 B65H 7/12 H04N 1/00 108 G01B 7/02 ──────────────────────────────────────────────────続 き Continuation of the front page (56) References JP-A-56-82989 (JP, A) (58) Fields investigated (Int. Cl. 6 , DB name) G06K 13/067 B65H 7/12 H04N 1 / 00 108 G01B 7/02
Claims (1)
ら出力電圧を出力するセンサと、 このセンサの初期状態時において、前記発光部と前記受
光部の間に介在させる紙の厚みを変化させたときに、こ
の変化に応じて前記受光部から出力される出力電圧の変
化を基準特性データとして記憶すると共に、この基準特
性データにおける前記発光部と前記受光部の間に紙を介
在させていない場合に前記受光部から出力される出力電
圧と前記発光部と前記受光部の間に所定の厚みの紙を介
在させた場合に前記受光部から出力される出力電圧との
比で求めた前記センサの透過率を記憶する第１の記憶手
段と、電源投入時に前記発光部と前記受光部の間に紙を介在さ
せていない状態で前記受光部から出力される出力電圧を
検出する第１の 検出手段と、 この第１の検出手段により検出された前記出力電圧と前
記透過率とに基づいて前記電源投入後の時点において前
記所定の厚みの紙を前記発光部と前記受光部の間に紙を
介在させた場合に前記受光部から出力されるべき出力電
圧を演算で求める第１の演算手段と、前記第１の記憶手段に記憶されている基準特性データか
ら読み出した前記発光部と前記受光部の間に所定の厚み
の紙を介在させた場合の出力電圧と前記第１の演算手段
で求めた出力電圧との差分を補正値として求める 第２の
演算手段と、前記基準特性データを前記補正値により補正した補正後
の基準特性データを記憶する第２の記憶手段と、 前記センサの前記発光部と前記受光部の間に紙が送り込
まれた際に、前記受光部から出力される出力電圧と前記
補正後の基準特性データとに基づいて 紙のダブルフィー
ドを検出する監視手段とを具備したことを特徴とするダ
ブルフィード検出装置。A light-emitting part and a light- receiving part;
Wherein receiving the sensor for outputting a et output voltage, Oite to the initial state of the sensor, and the light emitting portion
When changing the thickness of the paper interposed between the optical parts,
Changes in the output voltage output from the light receiving section in response to changes in
Is stored as reference characteristic data.
Paper between the light emitting unit and the light receiving unit
Output power from the light-receiving unit when not
Pressure between the light emitting unit and the light receiving unit.
Between the output voltage and the output voltage
A first storage unit for storing the transmittance of the sensor obtained by the ratio, and a paper interposed between the light emitting unit and the light receiving unit when the power is turned on.
Output voltage from the light-receiving unit
First detecting means for detecting, said detected output voltage before the first detection means
At the time after the power is turned on based on the transmittance.
A sheet of paper having a predetermined thickness is placed between the light emitting section and the light receiving section.
Output power that should be output from the
First calculating means for calculating the pressure, and reference characteristic data stored in the first storage means.
A predetermined thickness between the light emitting unit and the light receiving unit read from
Output voltage when paper is interposed and the first arithmetic means
Second calculating means for obtaining a difference from the output voltage obtained in the above as a correction value, and after correcting the reference characteristic data by the correction value.
Second storage means for storing reference characteristic data of the sensor, and paper being fed between the light emitting portion and the light receiving portion of the sensor.
The output voltage output from the light receiving unit when
A double-feed detection device comprising: a monitoring unit configured to detect a double feed of the paper based on the corrected reference characteristic data .
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| JP4004478A JP2994126B2 (en) | 1992-01-14 | 1992-01-14 | Double feed detection device |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| JP4004478A JP2994126B2 (en) | 1992-01-14 | 1992-01-14 | Double feed detection device |
Publications (2)
| Publication Number | Publication Date |
|---|---|
| JPH05189622A JPH05189622A (en) | 1993-07-30 |
| JP2994126B2 true JP2994126B2 (en) | 1999-12-27 |
Family
ID=11585220
Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| JP4004478A Expired - Fee Related JP2994126B2 (en) | 1992-01-14 | 1992-01-14 | Double feed detection device |
Country Status (1)
| Country | Link |
|---|---|
| JP (1) | JP2994126B2 (en) |
Families Citing this family (1)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| JP5987070B2 (en) * | 2015-01-30 | 2016-09-06 | 京セラドキュメントソリューションズ株式会社 | Paper feeding device and image forming apparatus |
-
1992
- 1992-01-14 JP JP4004478A patent/JP2994126B2/en not_active Expired - Fee Related
Also Published As
| Publication number | Publication date |
|---|---|
| JPH05189622A (en) | 1993-07-30 |
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