DE2251510A1 - CONVENTIONAL PROCEDURES FOR SCANNING PUNCH STRIPS AND PUNCH CARDS - Google Patents

CONVENTIONAL PROCEDURES FOR SCANNING PUNCH STRIPS AND PUNCH CARDS

Info

Publication number
DE2251510A1
DE2251510A1 DE19722251510 DE2251510A DE2251510A1 DE 2251510 A1 DE2251510 A1 DE 2251510A1 DE 19722251510 DE19722251510 DE 19722251510 DE 2251510 A DE2251510 A DE 2251510A DE 2251510 A1 DE2251510 A1 DE 2251510A1
Authority
DE
Germany
Prior art keywords
scanning
punch
strips
punched
cards
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.)
Pending
Application number
DE19722251510
Other languages
German (de)
Inventor
Willi Zeiss
Current Assignee (The listed assignees may be inaccurate. Google has not performed a legal analysis and makes no representation or warranty as to the accuracy of the list.)
Nord Micro Elektronik Feinmechanik AG
Original Assignee
Nord Micro Elektronik Feinmechanik AG
Priority date (The priority date 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 date listed.)
Filing date
Publication date
Application filed by Nord Micro Elektronik Feinmechanik AG filed Critical Nord Micro Elektronik Feinmechanik AG
Priority to DE19722251510 priority Critical patent/DE2251510A1/en
Publication of DE2251510A1 publication Critical patent/DE2251510A1/en
Pending legal-status Critical Current

Links

Classifications

    • G—PHYSICS
    • G06—COMPUTING; CALCULATING OR COUNTING
    • G06K—GRAPHICAL DATA READING; PRESENTATION OF DATA; RECORD CARRIERS; HANDLING RECORD CARRIERS
    • G06K7/00—Methods or arrangements for sensing record carriers, e.g. for reading patterns
    • G06K7/10—Methods or arrangements for sensing record carriers, e.g. for reading patterns by electromagnetic radiation, e.g. optical sensing; by corpuscular radiation
    • G06K7/10544—Methods or arrangements for sensing record carriers, e.g. for reading patterns by electromagnetic radiation, e.g. optical sensing; by corpuscular radiation by scanning of the records by radiation in the optical part of the electromagnetic spectrum
    • G06K7/10821—Methods or arrangements for sensing record carriers, e.g. for reading patterns by electromagnetic radiation, e.g. optical sensing; by corpuscular radiation by scanning of the records by radiation in the optical part of the electromagnetic spectrum further details of bar or optical code scanning devices
    • G06K7/10851—Circuits for pulse shaping, amplifying, eliminating noise signals, checking the function of the sensing device

Landscapes

  • Physics & Mathematics (AREA)
  • Electromagnetism (AREA)
  • Engineering & Computer Science (AREA)
  • Health & Medical Sciences (AREA)
  • General Health & Medical Sciences (AREA)
  • Toxicology (AREA)
  • Artificial Intelligence (AREA)
  • Computer Vision & Pattern Recognition (AREA)
  • General Physics & Mathematics (AREA)
  • Theoretical Computer Science (AREA)
  • Optical Recording Or Reproduction (AREA)

Description

Herkömmliche Verfahren für das Abtasten von Lochstreifen und Lochkarten Es sind Verfahren bekannt die die vorstehenden Datenträger mit a) mechanischen b) kapazitiven c) optischen Mitteln abtasten.Conventional methods for scanning punched tapes and punched cards Processes are known which use the above data carriers with a) mechanical b) capacitive c) scan optical means.

Im nachfolgenden wird nur auf die bisherigen optischen Verfahren eingegangen.In the following, only the previous optical methods will be discussed.

Bei den bekannten optischen Abtastverfahren wird eine statische Lichtquelle mit einer statischen Lichtempfangseinrichtung nach dem Durchstrahlungs- oder Reflektionsprinzip derart gekoppelt, daß die Information des Datenträgers (Lochung oder keine Lochung) am. Ausgang des Lichtempfängers zur Verfügung steht.In the known optical scanning method, a static light source is used with a static light receiving device based on the transmission or reflection principle coupled in such a way that the information on the data carrier (perforation or no perforation) is available at the output of the light receiver.

Der Nachteil dieser Verfahren liegt darin, daß mit statischem Licht gearbeitet wird und daß der Lichtempfänger eine Gleichspannungskopplung aufweist.The disadvantage of this method is that it involves static light is worked and that the light receiver has a DC voltage coupling.

Dies erfordert bei hochwertigen Abtasteinrichtungen eine Bomplizierte Drift- und Offsetkompensation um z.B. die Lichtquellenalterung auszugleichen. De Gleichlauf der Abtastkanäle untereinander wird meist.nur durch umfangreiche Justierung erreicht, die bei starken Differenzen im den Umgebungstemparaturen der Abtasteinrichtungen meist zusätzlich eine Temperaturkompensation notwendig macht.In the case of high-quality scanning devices, this requires a complex one Drift and offset compensation, e.g. to compensate for the aging of the light source. De Synchronization of the scanning channels with one another is usually only possible through extensive adjustment achieved with strong differences in the ambient temperatures of the scanning devices usually also makes a temperature compensation necessary.

Abtastprinzip für Lochstreifen und Lochkarten Die Besonderheit des nachfolgend beschriebenen Abtastprinzips besteht in der Verwendung pulsierenden Lichts im Infrarotbereich oder im sichtbaren Bereich, verbunden mit einer Wechselspannungskupplung auf der Empfängerseite der Abtasteinrichtung.Scanning principle for punched tapes and punched cards The specialty of the The scanning principle described below consists in the use of pulsating Light in the infrared range or in the visible range, connected to an AC voltage coupling on the receiver side of the scanner.

DetailLierte Beschreibung Ein Wechselspannungsgenerator erzeugt Impulse die über einen Treiberverstärker LEDs (Light Emitting Diodes) zum periodischen Leuchten anregen. Diese Lichtimpulse treffen auf den Datenträger auf. Je nachdem ob eine Lochung im Datenträger vorhanden ist oder nicht werden diese Impulse von dem Lichtempfänger (Fototransistor oder Fotodiode) empfangen, wobei die Größe des Unterschiedes zwischen den beiden Zuständen durch die Transparenz des Datenträgermeterials beeinflußt wird.Detailed description An alternating voltage generator generates pulses via a driver amplifier LEDs (Light Emitting Diodes) for periodic lighting stimulate. These light pulses hit the data carrier. Depending on whether a Perforation in the disk is present or not, these pulses from the light receiver (Phototransistor or photodiode) received, the size of the difference between the two states is influenced by the transparency of the data carrier material.

Die am5Lichtempfänger ankommenden Impulse werden huber eine Wechselspannungskopplung einem Komparator zugeführt der die Amplitudenhöhe der Impulse mit einem Sollwert vergleicht.The impulses arriving at the light receiver are coupled via an alternating voltage a comparator is fed to the amplitude level of the pulses with a setpoint value compares.

Überschreiten die Amplituden diesen Sollwert, dann treten am Ausgang des Komparators Rechteckspannungen mit der jeweiligen Frequenz der Lichtimpulse auf. Der nachgeschaltete nachtriggerbare Monovibrator dessen Zeitkonstante größer als der Wert 1/Generatorfrequenz ist, setzt diese Impulse in die jeweilige Informationsaussage um.If the amplitudes exceed this target value, then occur at the output of the comparator square wave voltages with the respective frequency of the light pulses on. The downstream retriggerable monovibrator has a greater time constant than the value is 1 / generator frequency, puts these pulses in the respective information statement around.

Claims (3)

PATENTANSPRÜCHE: PATENT CLAIMS: () Abtastverfahren für Lochstreifen und Lochkarten gekennzeichnet durch die Verwendung von pulsierendem Licht im sichtbaren Bereich oder im Infrarotbereich -verbunden mit einer Wechsel spannungskoppelung der Empfangseinrichtung.() Scanning method for punched tape and punched cards marked through the use of pulsating light in the visible range or in the infrared range -Connected to an alternating voltage coupling of the receiving device. 2. Verfahren nach Anspruch 1 dadurch gekennzeichnet, daß von opto-elektronischen Bauelementen emittiertes, gepulstes Licht zur Abtastung von Lochstreifen oder Lochkarten verwendet wird.2. The method according to claim 1, characterized in that of opto-electronic Pulsed light emitted from components for scanning punched strips or punched cards is used. 3. Verfahren nach Anspruch 1 und 2 dadurch gekennzeichnet, daß eine Kombination von Komparator und nachtriggerbarem monostabilen Multivibrator zur Erzeugung des Ausgangssignals verwendet wird. 3. The method according to claim 1 and 2, characterized in that a Combination of comparator and retriggerable monostable multivibrator for generation of the output signal is used.
DE19722251510 1972-10-20 1972-10-20 CONVENTIONAL PROCEDURES FOR SCANNING PUNCH STRIPS AND PUNCH CARDS Pending DE2251510A1 (en)

Priority Applications (1)

Application Number Priority Date Filing Date Title
DE19722251510 DE2251510A1 (en) 1972-10-20 1972-10-20 CONVENTIONAL PROCEDURES FOR SCANNING PUNCH STRIPS AND PUNCH CARDS

Applications Claiming Priority (1)

Application Number Priority Date Filing Date Title
DE19722251510 DE2251510A1 (en) 1972-10-20 1972-10-20 CONVENTIONAL PROCEDURES FOR SCANNING PUNCH STRIPS AND PUNCH CARDS

Publications (1)

Publication Number Publication Date
DE2251510A1 true DE2251510A1 (en) 1974-04-25

Family

ID=5859597

Family Applications (1)

Application Number Title Priority Date Filing Date
DE19722251510 Pending DE2251510A1 (en) 1972-10-20 1972-10-20 CONVENTIONAL PROCEDURES FOR SCANNING PUNCH STRIPS AND PUNCH CARDS

Country Status (1)

Country Link
DE (1) DE2251510A1 (en)

Cited By (2)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
DE2747076A1 (en) * 1977-10-20 1979-04-26 Interflex Datensyst OPTO ELECTRIC CODE CARD READER
US8240331B2 (en) 2008-10-16 2012-08-14 Honeywell International Inc. Negative pressure relief valve assembly

Cited By (2)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
DE2747076A1 (en) * 1977-10-20 1979-04-26 Interflex Datensyst OPTO ELECTRIC CODE CARD READER
US8240331B2 (en) 2008-10-16 2012-08-14 Honeywell International Inc. Negative pressure relief valve assembly

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