GB1281888A - Improvements in or relating to the measurement of an area - Google Patents

Improvements in or relating to the measurement of an area

Info

Publication number
GB1281888A
GB1281888A GB4374968A GB4374968A GB1281888A GB 1281888 A GB1281888 A GB 1281888A GB 4374968 A GB4374968 A GB 4374968A GB 4374968 A GB4374968 A GB 4374968A GB 1281888 A GB1281888 A GB 1281888A
Authority
GB
United Kingdom
Prior art keywords
record
curve
light
scanned
photo
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
GB4374968A
Inventor
Richard Carlile Marshall
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.)
Kent Instruments Ltd
Original Assignee
Kent Instruments Ltd
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 Kent Instruments Ltd filed Critical Kent Instruments Ltd
Priority to GB4374968A priority Critical patent/GB1281888A/en
Publication of GB1281888A publication Critical patent/GB1281888A/en
Expired legal-status Critical Current

Links

Classifications

    • G—PHYSICS
    • G01—MEASURING; TESTING
    • G01N—INVESTIGATING OR ANALYSING MATERIALS BY DETERMINING THEIR CHEMICAL OR PHYSICAL PROPERTIES
    • G01N30/00—Investigating or analysing materials by separation into components using adsorption, absorption or similar phenomena or using ion-exchange, e.g. chromatography or field flow fractionation
    • G01N30/02—Column chromatography
    • G01N30/86—Signal analysis
    • G01N30/8603—Signal analysis with integration or differentiation

Landscapes

  • General Physics & Mathematics (AREA)
  • Physics & Mathematics (AREA)
  • Health & Medical Sciences (AREA)
  • Mathematical Analysis (AREA)
  • Mathematical Optimization (AREA)
  • Pure & Applied Mathematics (AREA)
  • Algebra (AREA)
  • Life Sciences & Earth Sciences (AREA)
  • Chemical & Material Sciences (AREA)
  • Analytical Chemistry (AREA)
  • Biochemistry (AREA)
  • General Health & Medical Sciences (AREA)
  • Immunology (AREA)
  • Pathology (AREA)
  • Investigating Or Analysing Materials By Optical Means (AREA)

Abstract

1281888 Measuring areas photo-electrically KENT INSTRUMENTS Ltd 13 Oct 1969 [13 Sept 1968] 43749/68 Heading G1A The areas under a closed curve are measured by providing apparatus which can detect a difference in radiation at the boundaries of the curve so that when the areas are scanned an output representative of the distance between the differences can be summed to give a measure of each area. The area 10, which may be a record curve from chromatograph apparatus, is mounted in holder 28 and scanned by a beam of light from lamps 22 which is reflected on to the chart by rotating mirrors 26. Behind the chart are photo-cells 36 which detect the change in intensity of the transmitted light when it passes over the boundary lines of the curve. These changes operate respective ones of triggers 40 to on and off respectively so that during the on period the signal is integrated at 42. Synchronized with the rotation of mirrors 26 is a displacement device which moves the record 28 vertically one step for each sweep of light so that the whole area is scanned in parallel strips. Signals representative of the length of each strip are added in integrator 42 and presented on readout device 44. The signals may be analogue or pulses. In an alternative embodiment, Fig. 3 (not shown) the light source itself is rotated and the record again moved in steps perpendicular to the light beam. In this example a pair of photo-detectors is used to detect the change in the diffusing reflective property of the surface at the curve boundaries which are drawn using different coloured inks. Various alterations can be made in the construction of both embodiments to provide the scanning action. In a further embodiment the record may be placed adjacent the face of a cathode ray tube whose light spot is used as the source. A normal raster scan may be used or alternatively the record can be moved vertically and the spot scanned horizontally, Figs.4 and 5 (not shown).
GB4374968A 1968-09-13 1968-09-13 Improvements in or relating to the measurement of an area Expired GB1281888A (en)

Priority Applications (1)

Application Number Priority Date Filing Date Title
GB4374968A GB1281888A (en) 1968-09-13 1968-09-13 Improvements in or relating to the measurement of an area

Applications Claiming Priority (1)

Application Number Priority Date Filing Date Title
GB4374968A GB1281888A (en) 1968-09-13 1968-09-13 Improvements in or relating to the measurement of an area

Publications (1)

Publication Number Publication Date
GB1281888A true GB1281888A (en) 1972-07-19

Family

ID=10430160

Family Applications (1)

Application Number Title Priority Date Filing Date
GB4374968A Expired GB1281888A (en) 1968-09-13 1968-09-13 Improvements in or relating to the measurement of an area

Country Status (1)

Country Link
GB (1) GB1281888A (en)

Cited By (2)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
WO1981000083A1 (en) * 1979-07-02 1981-01-22 Mohn Gmbh Reinhard Method and device for determining order values allowing particularly the automatic control of printers
GB2143635A (en) * 1983-07-13 1985-02-13 Barron And Mccann Limited Chart reader

Cited By (2)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
WO1981000083A1 (en) * 1979-07-02 1981-01-22 Mohn Gmbh Reinhard Method and device for determining order values allowing particularly the automatic control of printers
GB2143635A (en) * 1983-07-13 1985-02-13 Barron And Mccann Limited Chart reader

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Legal Events

Date Code Title Description
PS Patent sealed
PLNP Patent lapsed through nonpayment of renewal fees