GB897316A - Sensing transducer - Google Patents

Sensing transducer

Info

Publication number
GB897316A
GB897316A GB40113/59A GB4011359A GB897316A GB 897316 A GB897316 A GB 897316A GB 40113/59 A GB40113/59 A GB 40113/59A GB 4011359 A GB4011359 A GB 4011359A GB 897316 A GB897316 A GB 897316A
Authority
GB
United Kingdom
Prior art keywords
character
group
sensitive
gaps
terminals
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
Application number
GB40113/59A
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.)
International Business Machines Corp
Original Assignee
International Business Machines Corp
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 International Business Machines Corp filed Critical International Business Machines Corp
Publication of GB897316A publication Critical patent/GB897316A/en
Expired 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
    • G06K7/10831—Arrangement of optical elements, e.g. lenses, mirrors, prisms
    • 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
    • G06K7/08—Methods or arrangements for sensing record carriers, e.g. for reading patterns by means detecting the change of an electrostatic or magnetic field, e.g. by detecting change of capacitance between electrodes
    • G06K7/082—Methods or arrangements for sensing record carriers, e.g. for reading patterns by means detecting the change of an electrostatic or magnetic field, e.g. by detecting change of capacitance between electrodes using inductive or magnetic sensors
    • G06K7/083—Methods or arrangements for sensing record carriers, e.g. for reading patterns by means detecting the change of an electrostatic or magnetic field, e.g. by detecting change of capacitance between electrodes using inductive or magnetic sensors inductive
    • G06K7/084—Methods or arrangements for sensing record carriers, e.g. for reading patterns by means detecting the change of an electrostatic or magnetic field, e.g. by detecting change of capacitance between electrodes using inductive or magnetic sensors inductive sensing magnetic material by relative movement detecting flux changes without altering its magnetised state
    • G—PHYSICS
    • G06—COMPUTING; CALCULATING OR COUNTING
    • G06V—IMAGE OR VIDEO RECOGNITION OR UNDERSTANDING
    • G06V10/00—Arrangements for image or video recognition or understanding
    • G06V10/20—Image preprocessing
    • G—PHYSICS
    • G06—COMPUTING; CALCULATING OR COUNTING
    • G06V—IMAGE OR VIDEO RECOGNITION OR UNDERSTANDING
    • G06V10/00—Arrangements for image or video recognition or understanding
    • G06V10/88—Image or video recognition using optical means, e.g. reference filters, holographic masks, frequency domain filters or spatial domain filters
    • G—PHYSICS
    • G06—COMPUTING; CALCULATING OR COUNTING
    • G06V—IMAGE OR VIDEO RECOGNITION OR UNDERSTANDING
    • G06V30/00—Character recognition; Recognising digital ink; Document-oriented image-based pattern recognition
    • G06V30/10—Character recognition
    • G06V30/14—Image acquisition
    • G06V30/144—Image acquisition using a slot moved over the image; using discrete sensing elements at predetermined points; using automatic curve following means
    • G—PHYSICS
    • G06—COMPUTING; CALCULATING OR COUNTING
    • G06V—IMAGE OR VIDEO RECOGNITION OR UNDERSTANDING
    • G06V30/00—Character recognition; Recognising digital ink; Document-oriented image-based pattern recognition
    • G06V30/10—Character recognition
    • G06V30/22—Character recognition characterised by the type of writing
    • G06V30/224—Character recognition characterised by the type of writing of printed characters having additional code marks or containing code marks
    • G06V30/2253—Recognition of characters printed with magnetic ink

Landscapes

  • Engineering & Computer Science (AREA)
  • Physics & Mathematics (AREA)
  • General Physics & Mathematics (AREA)
  • Theoretical Computer Science (AREA)
  • Multimedia (AREA)
  • Computer Vision & Pattern Recognition (AREA)
  • Electromagnetism (AREA)
  • Artificial Intelligence (AREA)
  • Health & Medical Sciences (AREA)
  • General Health & Medical Sciences (AREA)
  • Toxicology (AREA)
  • Character Input (AREA)

Abstract

897,316. Recognizing characters. INTERNATIONAL BUSINESS MACHINES CORPORATION. Nov. 25, 1959 [Nov. 26, 1958], No. 40113/59. Class 106 (1). In a character-reading apparatus a sensing device is used which provides two different signals from a single scan over the character. In the form of Fig. 1, a magnetic sensing head consists of a series of pairs of magnetic core elements 11, 12, separated at the bottom by a gap 13 for co-operation with the character and at the top by a gap 25 which controls the flux induced. Alternate pairs are oppositely disposed for convenience and form two groups. In one group the control gaps 25 vary from small to large from one side to the other of the head and the gaps of the other group vary from large to small. The groups are each linked by a winding 20 which develop at terminals 23, 24 a signal proportional to the sum of the magnetic flux changes in all the cores of the associated group. The group of which the cores have the smaller control gaps on the left is most sensitive on that side whereas the other group is most sensitive on the right. As the head passes over a character therefore the terminals 23 give a greater signal than terminals 24 in response to character areas on the left-hand side and vice versa. The core elements are bonded together in a block 19. Another way of obtaining the graded sensitivity is to space the reading gaps away from the character by different amounts as shown in Fig. 3. In another modification, all the core elements are similar and there are no control gaps. Individual windings, one for each core, are given weighted numbers of turns and the windings associated with each group are connected in series. In Fig. 5 the same result is achieved in an optical system, the character being projected by lens 57 and prism 56 on to slotted mask plates 50. Graded filters 49 placed in front of the plates 50 render photo-cell 40a more sensitive to character parts at the upper end of the slot and photocell 40b more sensitive to parts at the lower end.
GB40113/59A 1958-11-26 1959-11-25 Sensing transducer Expired GB897316A (en)

Applications Claiming Priority (1)

Application Number Priority Date Filing Date Title
US897316XA 1958-11-26 1958-11-26

Publications (1)

Publication Number Publication Date
GB897316A true GB897316A (en) 1962-05-23

Family

ID=22219319

Family Applications (1)

Application Number Title Priority Date Filing Date
GB40113/59A Expired GB897316A (en) 1958-11-26 1959-11-25 Sensing transducer

Country Status (4)

Country Link
DE (1) DE1105216B (en)
FR (1) FR1241477A (en)
GB (1) GB897316A (en)
NL (1) NL245630A (en)

Cited By (2)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
US3426325A (en) * 1965-03-30 1969-02-04 Philco Ford Corp Character recognition apparatus
US3469238A (en) * 1965-03-30 1969-09-23 Philco Ford Corp Character recognition apparatus using single stroke scansion of character area with elongate image

Families Citing this family (1)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
US3243776A (en) * 1963-02-08 1966-03-29 Ncr Co Scanning system for registering and reading characters

Cited By (2)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
US3426325A (en) * 1965-03-30 1969-02-04 Philco Ford Corp Character recognition apparatus
US3469238A (en) * 1965-03-30 1969-09-23 Philco Ford Corp Character recognition apparatus using single stroke scansion of character area with elongate image

Also Published As

Publication number Publication date
NL245630A (en)
FR1241477A (en) 1960-09-16
DE1105216B (en) 1961-04-20

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