JPS6250869B2 - - Google Patents
Info
- Publication number
- JPS6250869B2 JPS6250869B2 JP59234904A JP23490484A JPS6250869B2 JP S6250869 B2 JPS6250869 B2 JP S6250869B2 JP 59234904 A JP59234904 A JP 59234904A JP 23490484 A JP23490484 A JP 23490484A JP S6250869 B2 JPS6250869 B2 JP S6250869B2
- Authority
- JP
- Japan
- Prior art keywords
- lamp
- present
- signal
- pattern
- lighting
- 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
- 238000005286 illumination Methods 0.000 claims description 5
- 238000003909 pattern recognition Methods 0.000 claims description 4
- 238000001514 detection method Methods 0.000 claims description 2
- 238000012015 optical character recognition Methods 0.000 description 7
- 229910001507 metal halide Inorganic materials 0.000 description 5
- 150000005309 metal halides Chemical class 0.000 description 5
- 238000010586 diagram Methods 0.000 description 4
- 238000004804 winding Methods 0.000 description 3
- 239000003990 capacitor Substances 0.000 description 2
- 229910001511 metal iodide Inorganic materials 0.000 description 2
- 206010047571 Visual impairment Diseases 0.000 description 1
- 238000013459 approach Methods 0.000 description 1
- 230000007423 decrease Effects 0.000 description 1
- 230000008020 evaporation Effects 0.000 description 1
- 238000001704 evaporation Methods 0.000 description 1
- 238000003384 imaging method Methods 0.000 description 1
- QSHDDOUJBYECFT-UHFFFAOYSA-N mercury Chemical compound [Hg] QSHDDOUJBYECFT-UHFFFAOYSA-N 0.000 description 1
- 238000000034 method Methods 0.000 description 1
- 230000003287 optical effect Effects 0.000 description 1
- 230000010355 oscillation Effects 0.000 description 1
- 230000001052 transient effect Effects 0.000 description 1
- 208000029257 vision disease Diseases 0.000 description 1
- 230000004393 visual impairment Effects 0.000 description 1
Landscapes
- Image Input (AREA)
- Facsimile Scanning Arrangements (AREA)
- Character Input (AREA)
Description
【発明の詳細な説明】
〔発明の背景〕
本発明はパターン認識装置、特に光源にメタル
ハライドランプ等のように定常状態に達する迄に
時間のかかるランプを用いたパターン認識装置に
関する。DETAILED DESCRIPTION OF THE INVENTION [Background of the Invention] The present invention relates to a pattern recognition device, and particularly to a pattern recognition device using a lamp that takes time to reach a steady state, such as a metal halide lamp, as a light source.
従来例えば光学式文字読取装置（OCR）等に
おいて高速化を計る場合に高速化を阻害していた
一因に照明装置の暗さがある。これを解決する手
段として実願昭54−140432号（光学的読取装置）
等のように光源にメタルハライドランプ等の高効
率な光源を用いた装置がある。この光源は高圧水
銀蒸気圧中に金属沃化物を封入したランプで発光
効率は良いが定常点灯に達する迄の時間が金属沃
化物の蒸発時間で定まり、以下の如き欠点があつ
た。すなわちOCRの読取動作を開始するにあた
り、照明装置が定常に達したか否かを判別する必
要があつた。この判別を人間によつて行なう事は
視力障害の発生、および個人差等から好ましくな
く、又光電変換器以外のホトセンサによりランプ
の明るさを直接計測するとコスト高であり、さら
に又、光電変換器出力から得るにはテスト帳票、
又はそれ相当の手段、例えば帳票のない時の帳票
面にあたる部分を白くしておく、等の方法が必要
になる。 Conventionally, when trying to increase the speed of, for example, an optical character reader (OCR), one of the factors that hindered the increase in speed was the darkness of the lighting device. As a means to solve this problem, Utility Application No. 54-140432 (optical reading device)
There are devices that use a highly efficient light source such as a metal halide lamp as a light source. This light source is a lamp with metal iodide sealed in high-pressure mercury vapor pressure, and has good luminous efficiency, but the time it takes to reach steady lighting is determined by the evaporation time of the metal iodide, and it has the following drawbacks. That is, before starting an OCR reading operation, it was necessary to determine whether the illumination device had reached a steady state. It is undesirable for humans to perform this discrimination due to visual impairment and individual differences.Moreover, directly measuring the brightness of the lamp with a photosensor other than a photoelectric converter is expensive; To get from the output test form,
Or equivalent means, such as leaving the part of the form white when there is no form, is required.
本発明はこれらの欠点を除去し、簡便な方法で
照明装置が定常値に達したことを電気信号で検出
し、この信号により、読取動作を開始せしめるよ
うにすることを目的とするものである。
It is an object of the present invention to eliminate these drawbacks and to detect in a simple manner that the lighting device has reached a steady state value using an electrical signal, and to use this signal to start a reading operation. .
この目的を達成するため、本発明においては照
明ランプの電流が定常値に達たことを検出して照
明装置が定常状態になつたと判定して読取動作を
開始せしめる点に特徴がある。
In order to achieve this objective, the present invention is characterized in that it detects that the current of the illumination lamp has reached a steady state value, determines that the illumination device is in a steady state, and then starts the reading operation.
以下、説明では、たとえばOCRなどにおける
紙送りから読取動作に入るとみた場合をとりあげ
るが、紙送りが不要な場合には、光電変換された
電気信号に対する認識処理から読取動作に入ると
みることができ、その他様々な場合に対しても本
発明を適用し得ることはいうまでもない。 In the following explanation, we will consider the case where the reading operation starts from paper feeding in OCR, for example, but if paper feeding is not necessary, the reading operation can be considered to start from the recognition process for the photoelectrically converted electrical signal. It goes without saying that the present invention can be applied to various other cases as well.
以下、図面により本発明を説明する。 The present invention will be explained below with reference to the drawings.
第１図はメタルハライドランプの起動特性であ
る。メタルハライドランプは点灯直後にランプ電
圧がＶLD迄低下し、その後ランプ発光管の温度上
昇につれてランプ電圧が上昇し数分後に定常値Ｖ
LＣに達する。ランプ電圧ＶLの変化に伴つてラン
プ電流ＩLも変化しＶLDの時に最大電流ＩLＭとな
り、その後ＶLの上昇に従つてＩLは減少しＶLＣ
の時に定常値ＩLＣとなる。従つてＶL、又はＩL
を観測することによつてランプの状態を知ること
が出来る。ＶLは一般に点灯開始時には高電圧が
加わるのでＶLの変化範囲が大きく、種々のトラ
ブルが生じやすい。しかしＩLはランプが損耗し
ない値に安定器により制限されるのでその範囲は
定常値に比べ高々２倍程度である。本発明では以
上の理由からＩLの変化を検出するが、ＶLの変化
を検出しても原理的に何ら問題は無い。 Figure 1 shows the starting characteristics of a metal halide lamp. Immediately after lighting a metal halide lamp, the lamp voltage drops to V LD , and then increases as the temperature of the lamp arc tube rises, and after a few minutes reaches the steady value V LD.
Reach LC . As the lamp voltage V L changes, the lamp current I L also changes, reaching a maximum current I L M when V LD , and then as V L increases, I L decreases to V L C.
When , the steady value I L C is reached. Therefore, V L or I L
The condition of the lamp can be known by observing the . Since a high voltage is generally applied to V L at the start of lighting, the variation range of V L is large, and various troubles are likely to occur. However, since I L is limited by the ballast to a value that does not cause the lamp to wear out, its range is at most twice as large as the steady value. In the present invention, changes in I L are detected for the above reasons, but there is no problem in principle even if changes in V L are detected.
第２図は本発明を説明するための一実施例であ
る。１１は発振器であり、１はトランスである。
１１と１はインバータ等の発振トランス、又は出
力トランスであつても良い。２と３はランプ４を
安定に点灯するための安定器でインダクタンスＬ
とコンデンサＣの直列回路である。原理的に３は
無くても良い。２には２次巻線が設けられており
２次側ではダイオード５、抵抗６、コンデンサ７
により半波整流回路を構成している。 FIG. 2 is an embodiment for explaining the present invention. 11 is an oscillator, and 1 is a transformer.
11 and 1 may be an oscillation transformer such as an inverter or an output transformer. 2 and 3 are ballasts for stably lighting lamp 4, and inductance L
and capacitor C in series circuit. In principle, 3 may be omitted. 2 is provided with a secondary winding, and on the secondary side there is a diode 5, a resistor 6, and a capacitor 7.
This constitutes a half-wave rectifier circuit.
ランプ４が点灯し、ランプ電流ＩLが流れると
ＩLに比例した電圧が２次巻線２に誘起される。
６，７における時定数値をＩLの過渡期間ＴTより
大きく選んでおくと第４図鎖線に示すような直流
電圧ＶCが得られる。したがつて、ＶCの値を比較
器８等で判定することによつてランプが定常値に
達したかを知ることが出来る。 When the lamp 4 is turned on and the lamp current I L flows, a voltage proportional to I L is induced in the secondary winding 2.
If the time constant values at 6 and 7 are selected to be larger than the transient period T T of I L , a DC voltage V C as shown by the chain line in FIG. 4 can be obtained. Therefore, by determining the value of V C using the comparator 8 or the like, it is possible to know whether the lamp has reached its steady state value.
第３図は本発明の他の実施例で２次巻線２の代
りに微少抵抗２２を回路中に直列に挿入し、２２
の両端の電圧変化を検出する例である。 FIG. 3 shows another embodiment of the present invention in which a minute resistor 22 is inserted in series in the circuit instead of the secondary winding 2.
This is an example of detecting voltage changes across both ends.
第５図は本発明を用いたOCRの実施例であ
る。１０は第２図、第３図に示した部分で、制御
部３３からの信号Soによりランプ４が点灯す
る。第２図においてランプ電流が定常値に近づき
あらかじめ設定された電圧ＶREFを越えると比較
器８の出力VCOが第５図における信号S1として
３３に送られる。３３はプログラムロード等、他
の条件が成立している場合には紙送り機構に対
し、紙送り開始信号STARTを送ることにより、
読取り動作を開始せしめる。 FIG. 5 is an example of OCR using the present invention. Reference numeral 10 denotes a portion shown in FIGS. 2 and 3, in which the lamp 4 is turned on by a signal So from the control section 33. In FIG. 2, when the lamp current approaches a steady-state value and exceeds the preset voltage V REF , the output VCO of comparator 8 is sent to 33 as signal S 1 in FIG. 33 is by sending a paper feed start signal START to the paper feed mechanism when other conditions such as program loading are satisfied.
Initiate a read operation.
３０は結像レンズ、３１は光電変換器、３５は
帳票、３４は紙送りローラである。ビデオ信号処
理部３２より出力されたビデオ信号VIDEOに対
しては制御部３３において認識処理がおこなわれ
る。 30 is an imaging lens, 31 is a photoelectric converter, 35 is a form, and 34 is a paper feed roller. The control section 33 performs recognition processing on the video signal VIDEO output from the video signal processing section 32 .
また３３には第６図の如くタイマー機能があ
り、信号S1を発すると同時にタイマー３３０をス
タートする。一定時間後に信号S1の有無を認識す
る信号S2をゲート３３２に加え、S1が無い時には
警報装置３３３をセツトし警報を発する。３３３
は３３１の出力信号、又は手動スイツチ３３４を
通して電圧Ｖを抵抗Ｒに印加することによりリセ
ツトされる。 Further, the timer 33 has a timer function as shown in FIG. 6, and starts the timer 330 at the same time as the signal S1 is issued. After a certain period of time, a signal S2 is applied to the gate 332 to recognize the presence or absence of the signal S1, and when there is no signal S1 , the alarm device 333 is set to issue an alarm. 333
is reset by the output signal of 331 or by applying voltage V to resistor R through manual switch 334.
以上述べた如く本発明によれば充分な紙面照度
が得られてからたとえば紙送りを開始するので安
定・確実な読取動作を保障出来その効果は大き
い。なお、本発明はOCRのみにとどまらず種々
の物体認識装置に適用出来ることは明らかであ
る。 As described above, according to the present invention, for example, paper feeding is started after sufficient illumination of the paper surface is obtained, so that a stable and reliable reading operation can be ensured, which is highly effective. Note that it is clear that the present invention is applicable not only to OCR but also to various object recognition devices.
第１図は本発明に用いるメタルハライドランプ
の電気的起動特性図、第２図、第３図は本発明の
電気的起動特性検出回路の実施例、第４図は第２
図および第３図の動作を説明するための特性図、
第５図は本発明にもとづくOCRのブロツク構成
図、第６図は第５図の制御部中に含まれる警報装
置の回路構成図である。
４……ランプ、３３……制御部。
FIG. 1 is an electrical starting characteristic diagram of a metal halide lamp used in the present invention, FIGS. 2 and 3 are examples of an electrical starting characteristic detection circuit of the present invention, and FIG.
A characteristic diagram for explaining the operation of FIG. 3 and FIG.
FIG. 5 is a block diagram of an OCR according to the present invention, and FIG. 6 is a circuit diagram of an alarm device included in the control section of FIG. 4... Lamp, 33... Control section.
Claims (1)
ーンからの光を光電変換して得られたビデオ信号
に対して、認識処理をおこなうことによりパター
ンの読取りをおこなうパターン認識装置におい
て、上記ランプの点灯後、上記ランプに流れる電
流または、上記ランプに加わる電圧が定常値に達
したことを検出する手段と、該検出結果に基づい
て上記ランプの読取開始を指示する手段とを有す
ることを特徴とするパターン認識装置。1. In a pattern recognition device that reads a pattern by performing recognition processing on a video signal obtained by photoelectrically converting light from a pattern irradiated by an illumination means including a lamp, after lighting the lamp, Pattern recognition characterized by comprising means for detecting that the current flowing through the lamp or the voltage applied to the lamp has reached a steady value, and means for instructing to start reading the lamp based on the detection result. Device.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| JP59234904A JPS60114978A (en) | 1984-11-09 | 1984-11-09 | pattern recognition device |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| JP59234904A JPS60114978A (en) | 1984-11-09 | 1984-11-09 | pattern recognition device |
Publications (2)
| Publication Number | Publication Date |
|---|---|
| JPS60114978A JPS60114978A (en) | 1985-06-21 |
| JPS6250869B2 true JPS6250869B2 (en) | 1987-10-27 |
Family
ID=16978116
Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| JP59234904A Granted JPS60114978A (en) | 1984-11-09 | 1984-11-09 | pattern recognition device |
Country Status (1)
| Country | Link |
|---|---|
| JP (1) | JPS60114978A (en) |
Cited By (1)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| JPH02202094A (en) * | 1989-01-31 | 1990-08-10 | Yokota Kikai Kk | Board warpage preventing method and device therefor |
-
1984
- 1984-11-09 JP JP59234904A patent/JPS60114978A/en active Granted
Cited By (1)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| JPH02202094A (en) * | 1989-01-31 | 1990-08-10 | Yokota Kikai Kk | Board warpage preventing method and device therefor |
Also Published As
| Publication number | Publication date |
|---|---|
| JPS60114978A (en) | 1985-06-21 |
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