GB1274534A - Monitoring the flow of granular material - Google Patents

Monitoring the flow of granular material

Info

Publication number
GB1274534A
GB1274534A GB4407069A GB4407069A GB1274534A GB 1274534 A GB1274534 A GB 1274534A GB 4407069 A GB4407069 A GB 4407069A GB 4407069 A GB4407069 A GB 4407069A GB 1274534 A GB1274534 A GB 1274534A
Authority
GB
United Kingdom
Prior art keywords
monitoring
flow
conduit
light
granular material
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
GB4407069A
Inventor
Frederick John Hiorns
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 GB4407069A priority Critical patent/GB1274534A/en
Publication of GB1274534A publication Critical patent/GB1274534A/en
Expired legal-status Critical Current

Links

Classifications

    • G—PHYSICS
    • G01—MEASURING; TESTING
    • G01F—MEASURING VOLUME, VOLUME FLOW, MASS FLOW OR LIQUID LEVEL; METERING BY VOLUME
    • G01F1/00—Measuring the volume flow or mass flow of fluid or fluent solid material wherein the fluid passes through a meter in a continuous flow
    • G01F1/66—Measuring the volume flow or mass flow of fluid or fluent solid material wherein the fluid passes through a meter in a continuous flow by measuring frequency, phase shift or propagation time of electromagnetic or other waves, e.g. using ultrasonic flowmeters
    • G01F1/661—Measuring the volume flow or mass flow of fluid or fluent solid material wherein the fluid passes through a meter in a continuous flow by measuring frequency, phase shift or propagation time of electromagnetic or other waves, e.g. using ultrasonic flowmeters using light

Landscapes

  • Physics & Mathematics (AREA)
  • Electromagnetism (AREA)
  • Fluid Mechanics (AREA)
  • General Physics & Mathematics (AREA)
  • Measuring Volume Flow (AREA)

Abstract

1,274,534. Monitoring the flow of granular material. COAL INDUSTRY (PATENTS) Ltd. Aug.5, 1970 [Sept. 5, 1969], No. 44070/69. Heading G1A. A method or apparatus for monitoring the flow of granular material (e.g. coal) in a conduit 4 comprises a source 5 projecting light via a polarizer 7 through a transparent inspection portion 3 of the conduit 4 and a light detecting system 10 receiving and monitoring light reflected by the material flowing through the conduit. The detector, preferably a photo-voltaic cell, should receive a continuously variable pulsed signal. An alarm is activated if the signal becomes constant for more than a certain period, thereby warning of blockages. The light source may be a laser, a white light source or a high intensity mercury vapour lamp. The light is best projected at an angle of 67 degrees to the surface of the material that is at an angle at which little or no surface reflection takes place from inspection portion 3. In an alternative system an alarm is activated when the rate of flow of material decreases below a certain value.
GB4407069A 1969-09-05 1969-09-05 Monitoring the flow of granular material Expired GB1274534A (en)

Priority Applications (1)

Application Number Priority Date Filing Date Title
GB4407069A GB1274534A (en) 1969-09-05 1969-09-05 Monitoring the flow of granular material

Applications Claiming Priority (1)

Application Number Priority Date Filing Date Title
GB4407069A GB1274534A (en) 1969-09-05 1969-09-05 Monitoring the flow of granular material

Publications (1)

Publication Number Publication Date
GB1274534A true GB1274534A (en) 1972-05-17

Family

ID=10431619

Family Applications (1)

Application Number Title Priority Date Filing Date
GB4407069A Expired GB1274534A (en) 1969-09-05 1969-09-05 Monitoring the flow of granular material

Country Status (1)

Country Link
GB (1) GB1274534A (en)

Cited By (1)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
EP0129261A1 (en) * 1983-05-11 1984-12-27 Ihc Holland N.V. System and device for detecting the deposition of particles

Cited By (2)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
EP0129261A1 (en) * 1983-05-11 1984-12-27 Ihc Holland N.V. System and device for detecting the deposition of particles
US4559813A (en) * 1983-05-11 1985-12-24 Ihc Holland N.V. System and device for detecting the forming of depot

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Legal Events

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