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GB1479972A - Particle sizing apparatus - Google Patents

Particle sizing apparatus

Info

Publication number
GB1479972A
GB1479972A GB815274A GB815274A GB1479972A GB 1479972 A GB1479972 A GB 1479972A GB 815274 A GB815274 A GB 815274A GB 815274 A GB815274 A GB 815274A GB 1479972 A GB1479972 A GB 1479972A
Authority
GB
United Kingdom
Prior art keywords
shoot
rows
detector means
light
transverse
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
GB815274A
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.)
Coal Industry Patents Ltd
Original Assignee
Coal Industry Patents 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 Coal Industry Patents Ltd filed Critical Coal Industry Patents Ltd
Priority to GB815274A priority Critical patent/GB1479972A/en
Publication of GB1479972A publication Critical patent/GB1479972A/en
Expired legal-status Critical Current

Links

Classifications

    • G—PHYSICS
    • G01—MEASURING; TESTING
    • G01B—MEASURING LENGTH, THICKNESS OR SIMILAR LINEAR DIMENSIONS; MEASURING ANGLES; MEASURING AREAS; MEASURING IRREGULARITIES OF SURFACES OR CONTOURS
    • G01B11/00—Measuring arrangements characterised by the use of optical techniques
    • G01B11/02—Measuring arrangements characterised by the use of optical techniques for measuring length, width or thickness
    • G—PHYSICS
    • G01—MEASURING; TESTING
    • G01B—MEASURING LENGTH, THICKNESS OR SIMILAR LINEAR DIMENSIONS; MEASURING ANGLES; MEASURING AREAS; MEASURING IRREGULARITIES OF SURFACES OR CONTOURS
    • G01B11/00—Measuring arrangements characterised by the use of optical techniques
    • G01B11/02—Measuring arrangements characterised by the use of optical techniques for measuring length, width or thickness
    • G01B11/022—Measuring arrangements characterised by the use of optical techniques for measuring length, width or thickness by means of tv-camera scanning
    • G—PHYSICS
    • G01—MEASURING; TESTING
    • G01N—INVESTIGATING OR ANALYSING MATERIALS BY DETERMINING THEIR CHEMICAL OR PHYSICAL PROPERTIES
    • G01N15/00—Investigating characteristics of particles; Investigating permeability, pore-volume or surface-area of porous materials
    • G01N15/02—Investigating particle size or size distribution
    • G01N15/0205—Investigating particle size or size distribution by optical means

Landscapes

  • Physics & Mathematics (AREA)
  • General Physics & Mathematics (AREA)
  • Chemical & Material Sciences (AREA)
  • Dispersion Chemistry (AREA)
  • Health & Medical Sciences (AREA)
  • Life Sciences & Earth Sciences (AREA)
  • Analytical Chemistry (AREA)
  • Biochemistry (AREA)
  • General Health & Medical Sciences (AREA)
  • Immunology (AREA)
  • Pathology (AREA)
  • Length Measuring Devices By Optical Means (AREA)

Abstract

1479972 Measuring bodies photo-electrically COAL INDUSTRY (PATENTS) LTD 19 Feb 1975 [22 Feb 1974] 8152/74 Heading G1A Particle sizing is performed by determining the amount of obscuration of a light beam directed to light detector means when a particle is caused to slide down an inclined shoot. Particle sizing apparatus comprises an inclined shoot, light detector means extending transverse to the longitudinal axis of the shoot, and a light source arranged to illuminate the detector means. An inclined shoot 1, Fig. 1, comprising a pair of mutually-perpendicular plane plates 2, 3, is provided with light sources 7 which may comprise tungsten strip lamps on rows of LEDs and are arranged to illuminate transverse rows of holes 4, 5 in the plated 2, 3, behind which are rows of photo-detectors 6, Fig. 2, at 10 mm spacing, connected to an analyzer 8. As a lump of coal 9 fed from a vibrator (not shown) slides down the shoot 1, the numbers of detectors 6 shadowed by the lump in two dimensions are measured by the analyzer 8 which provides a signal representing the round sieve size to display or sorting apparatus (not shown). Air jets may be provided to clear dust from the holes 4, 5. In a second embodiment, Figs. 3 and 4 (not shown) a source, 7, providing a collimated beam illuminates a scanning camera (11) along an axis intercepted by the objects as they fall away from the end of the shoot (1). This arrangement provides a measurement of dimensions in transverse and longitudinal directions. The plates of the shoot may be spaced apart to allow objects smaller than a predetermined size to fall out of the shoot.
GB815274A 1975-02-19 1975-02-19 Particle sizing apparatus Expired GB1479972A (en)

Priority Applications (1)

Application Number Priority Date Filing Date Title
GB815274A GB1479972A (en) 1975-02-19 1975-02-19 Particle sizing apparatus

Applications Claiming Priority (1)

Application Number Priority Date Filing Date Title
GB815274A GB1479972A (en) 1975-02-19 1975-02-19 Particle sizing apparatus

Publications (1)

Publication Number Publication Date
GB1479972A true GB1479972A (en) 1977-07-13

Family

ID=9846749

Family Applications (1)

Application Number Title Priority Date Filing Date
GB815274A Expired GB1479972A (en) 1975-02-19 1975-02-19 Particle sizing apparatus

Country Status (1)

Country Link
GB (1) GB1479972A (en)

Cited By (5)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
FR2485198A1 (en) * 1980-06-19 1981-12-24 Gen Mining Union Corp METHOD AND DEVICE FOR MEASURING THE VOLUME OF A PARTICLE
US4497576A (en) * 1981-01-14 1985-02-05 L'etat Francais Article analyzer apparatus by silhouette projection
US4580684A (en) * 1982-01-27 1986-04-08 General Mining Union Corporation Limited Radiometric measurement
EP0195420A3 (en) * 1985-03-22 1988-01-27 BASF Aktiengesellschaft Measuring arrangement for the analysis of particle size
EP0198670A3 (en) * 1985-04-11 1989-08-23 Nippon Steel Corporation Measurement of sizes of particles in falling state

Cited By (6)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
FR2485198A1 (en) * 1980-06-19 1981-12-24 Gen Mining Union Corp METHOD AND DEVICE FOR MEASURING THE VOLUME OF A PARTICLE
US4417817A (en) 1980-06-19 1983-11-29 General Mining Union Corporation, Limited Volumetric measurement of particles
US4497576A (en) * 1981-01-14 1985-02-05 L'etat Francais Article analyzer apparatus by silhouette projection
US4580684A (en) * 1982-01-27 1986-04-08 General Mining Union Corporation Limited Radiometric measurement
EP0195420A3 (en) * 1985-03-22 1988-01-27 BASF Aktiengesellschaft Measuring arrangement for the analysis of particle size
EP0198670A3 (en) * 1985-04-11 1989-08-23 Nippon Steel Corporation Measurement of sizes of particles in falling state

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Legal Events

Date Code Title Description
PS Patent sealed
PCNP Patent ceased through non-payment of renewal fee