SE8304508D0 - SET AND DEVICE TO PERFORM OPTICAL ROCK DETECTION - Google Patents

SET AND DEVICE TO PERFORM OPTICAL ROCK DETECTION

Info

Publication number
SE8304508D0
SE8304508D0 SE8304508A SE8304508A SE8304508D0 SE 8304508 D0 SE8304508 D0 SE 8304508D0 SE 8304508 A SE8304508 A SE 8304508A SE 8304508 A SE8304508 A SE 8304508A SE 8304508 D0 SE8304508 D0 SE 8304508D0
Authority
SE
Sweden
Prior art keywords
sender
receiver
intensity
perform optical
unit
Prior art date
Application number
SE8304508A
Other languages
Swedish (sv)
Other versions
SE456786B (en
SE8304508L (en
Inventor
Vaclav Vonasek
Lennart Klang
Original Assignee
Vaclav Vonasek
Lennart Klang
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 Vaclav Vonasek, Lennart Klang filed Critical Vaclav Vonasek
Priority to SE8304508A priority Critical patent/SE456786B/en
Publication of SE8304508D0 publication Critical patent/SE8304508D0/en
Publication of SE8304508L publication Critical patent/SE8304508L/en
Publication of SE456786B publication Critical patent/SE456786B/en

Links

Classifications

    • G—PHYSICS
    • G08—SIGNALLING
    • G08B—SIGNALLING OR CALLING SYSTEMS; ORDER TELEGRAPHS; ALARM SYSTEMS
    • G08B17/00—Fire alarms; Alarms responsive to explosion
    • G08B17/10—Actuation by presence of smoke or gases, e.g. automatic alarm devices for analysing flowing fluid materials by the use of optical means
    • G08B17/103—Actuation by presence of smoke or gases, e.g. automatic alarm devices for analysing flowing fluid materials by the use of optical means using a light emitting and receiving device
    • G08B17/107—Actuation by presence of smoke or gases, e.g. automatic alarm devices for analysing flowing fluid materials by the use of optical means using a light emitting and receiving device for detecting light-scattering due to smoke

Landscapes

  • Chemical & Material Sciences (AREA)
  • Analytical Chemistry (AREA)
  • Business, Economics & Management (AREA)
  • Emergency Management (AREA)
  • Physics & Mathematics (AREA)
  • General Physics & Mathematics (AREA)
  • Investigating Or Analysing Materials By Optical Means (AREA)
  • Length Measuring Devices By Optical Means (AREA)
  • Emergency Alarm Devices (AREA)
  • Fire-Detection Mechanisms (AREA)

Abstract

A light beam of known intensity is transmitted from a sender unit (1) and after passage through an air space, is picked up and its intensity measured by a receiver unit (3). An alarm is activated when the intensity of the picked-up light radiation is less than that of the transmitted radiation by a specific amount. The sender (1) and receiver (3) are connected to a comparison unit (9) which at specific time intervals compares the light effect detected by the receiver (3) with the original value, and if necessary, controls the sender (1) so that the value is built up again.
SE8304508A 1983-08-19 1983-08-19 Comparison unit for smoke detection system SE456786B (en)

Priority Applications (1)

Application Number Priority Date Filing Date Title
SE8304508A SE456786B (en) 1983-08-19 1983-08-19 Comparison unit for smoke detection system

Applications Claiming Priority (1)

Application Number Priority Date Filing Date Title
SE8304508A SE456786B (en) 1983-08-19 1983-08-19 Comparison unit for smoke detection system

Publications (3)

Publication Number Publication Date
SE8304508D0 true SE8304508D0 (en) 1983-08-19
SE8304508L SE8304508L (en) 1985-02-20
SE456786B SE456786B (en) 1988-10-31

Family

ID=20352246

Family Applications (1)

Application Number Title Priority Date Filing Date
SE8304508A SE456786B (en) 1983-08-19 1983-08-19 Comparison unit for smoke detection system

Country Status (1)

Country Link
SE (1) SE456786B (en)

Also Published As

Publication number Publication date
SE456786B (en) 1988-10-31
SE8304508L (en) 1985-02-20

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