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Fire Detection
CCTV Techniques
The Following technical papers are from Micropack
Engineering
CCTV
Detectors from
Micropack
CCTV
techniques- Developments in Optical Fire Detection- Ray Hynd - A
technical article which details the development of the technique.
Flare
Radiation -Not
So Friendly Fire-Ian Davidson
Triple
Channel IR
Flame Detection – Magic or Myth?-Ian
Davidson
Flame Detector Selection
Flame
Detector Selection
- Ian Davidson
Detector
Selection Overview
Fire / Flame Detection
Fire
and Gas Detection - From the UK HSE -There are two principal types of
detector which are commonly in use in off-shore installations: heat, flame &
smoke, and flammable gas instruments. The most significant for risk reduction
are gas detection systems, since they give the earliest warning of hazardous
situations. Infra Red (IR), line-of-sight or point type detectors which identify
an accumulation of gas and acoustic leak detectors, are also used. The OSD
strategy is to promote the use of a combination of sensors, thereby giving early
leak detection with the acoustic detectors and identifying a gas cloud
accumulation with the IR type sensors.
Flame
Detector - One of the Cheapest Devices to Fight Fire - A flame detector is a
fire protection device, which detects the flame in the place where it is fixed
and issues an alarm thereby alerting nearby people to the danger of fire. In
most of the manufacturing companies, furnace flame detector is used in order to
detect and prevent fire. Flame detector responds either to radiant energy
visible to the human eye or outside the range of human vision. Most flame
detectors work either by optical flame detector or flame ionization detector but
some of them use combination of both detectors. From firesnoop.com .
Applying
Neural Network Technology to the Next Generation Flame Detector
- from General Monitors - Accurate and reliable
industrial flame monitoring has always represented a technical challenge. The
main flame monitoring concern lies in the requirement to differentiate spectral
radiation emitted by flames from that of background radiation, which is always
present in the industrial environment. Insufficient differentiation of flames
from background sources typically causes the highly undesirable condition of
false alarm. When a false alarm condition occurs, it activates automated fire
suppression equipment, causes operational interrupts, consumes extinguishing
materials, and requires resolution of the alarm condition, which can include a
complete system shutdown and restart. The development of Neural Network
Technology for multi-spectral optical flame detectors helps to resolve the
problems described
Handbook
for Fire Detection and Emergency Warning Systems in Buildings (From Ampac
industries Pty Ltd) - The purpose of this handbook is to provide information on
the various configurations available for Fire Detection Systems. Appendixes on
AS1668 controls and emergency warning systems have been included as they form
part of the modern day requirements for fire control.
Oil Mist Detectors
Oil Mist Detectors
- Some detail on the principle of operation
The
following excellent technical articles are from the Quality Monitoring Instruments
Ltd
Oil
Mist Detection as an Aid to Monitoring an Engine's Condition - Brian J. Smith
- Advances in technology have been such that health monitoring has now
become increasingly important with regard to diesel engine maintenance and
safety. Oil mist can give some of the first signs of impending problems for all
the moving parts of the engine. It is acknowledged that temperature and pressure
indication can also provide appropriate early warning of potential problems with
certain components, particularly those components that can be fitted with
temperature probes.
Oil
Mist Detection in the Atmosphere of the Engine Room - Brian J. Smith - You
may be aware MCA and IMO, together with other Societies, are very concerned
about the number of fires that start in machine room spaces. Places most at risk
are engine and purifier rooms. However, other areas have their own problems and
these include bowthruster rooms, steering gear and hydraulic pumps. Figures
produced suggest that up to 65% of machine room fires are the result of oil
mist.
Oil
Mist and Machinery Space Fires - Dr MH Holness - A review is
presented of the role of oil mist as a principal agent in machinery space fires.
The ways in which oil mist can be produced are described and the distinction
between mist and spray. The contrast between the oil mist conditions inside
crankcases and that in the general atmosphere in machinery spaces is discussed.
Methods of measuring oil mist and spray are described and equipment suitable for
monitoring conditions inside machinery and in machinery spaces is discussed.
Recommendations are made to improve safety on board ship and in industrial
plant.
IMO
Code of Practice for Atmospheric Oil Mist Detectors (PDF format - 234K) - International Maritime Organisation
Smoke Detectors
How
to Select the Perfect Smoke Detector - A Smoke detector is an important
device that helps you to prevent loss of persons or property due to fire
accidents. Smoke detectors are preferred as ideal equipment because you can get
away from the problem as soon as there is an abnormal smoke, thereby giving you
the optimum time and opportunity from the aftermaths of a fire accident. Hard
wired smoke detector and home smoke detector are the prominent ones used in the
current scenario. From firesnoop.com .
Smoke
Can Evade Our Eyes! But, it is Surely Visible to Ionization Detectors - Ionization
Smoke detector works with the help of ions. Ionization smoke detectors cannot be
used without seeking the prior permission of the concerned government authority.
Since ionization smoke detector calls for working under a process that may
involve hazardous process lot of formalities have to be complied with before
using an ionization detector. From firesnoop.com .