Objective
Background
Optical sensors and communications networks in hazardous
plants are increasingly replacing their electrically
operated equivalents. Optical sensors are unaffected by
electrical or magnetic interference and are inherently
safer in hazardous atmospheres; however, safety factors
will impose limitations on transmitted optical power or
energy. A previous project, also EC-supported,
investigated the use of optical methods of measurement in
potentially explosive atmospheres and defined the most
likely hazard as light falling on dust or fibres and
causing a local temperature rise. That project resulted
in a recommendation for safe levels of continuous optical
power for even the most easily ignited gases.
Objectives
The current project is investigating the safe use of
optical methods of measurement and communication in
industry, particularly where explosive atmospheres may be
present. It extends the previous study to include pulsed
optical sources and also address the change in hazard
presented (by pulsed or continuous optical sources) when
the dust is itself is combustible. Safe optical powers
or energies for industrially important hazardous gases,
solvents and dusts will also be investigated. The project
is expected to result in recommendations for safe optical
power and energy levels for inclusion in standards,
leading in due course to safer operating procedures.
Work programme
Task 1: Explosion initiation by pulsed light sources
The safe levels of pulsed optical energy permissible in
various gases and dust clouds will be determined, as a
function of pulse duration, repetition rate and number of
repetitions.
Task 2: Explosion initiation by optical irradiation of
combustible particles
The objective is to determine safe levels of optical
power, power density or energy when the optical beam,
pulsed or continuous, is illuminating combustible or
active dust particles.
Task 3: Variation of explosive atmospheres
Using pulsed and continuous radiation, safe levels of
optical power or energy in industrially important gases
and vapours, such as the hydrocarbons and solvents, will
be investigated.
Task 4: Input to standards and directives
The data generated during the project, and other relevant
information, will form the basis for a recommendation on
safe power and energy levels. This will be provided to
the standards committees CEN TC305, TC 114 and CENELEC
TC31 in suitable form for incorporation into standards
and directives for safe equipment or particles in
potentially explosive atmospheres, including ATEX 100a
and prEN1127-1.
State of progress
The project proceeded according to plan during the first
six months. For Task 2, the materials initially chosen
for investigation were: iron oxide (non-rust), iron rust,
coal, soot and an inert material (Kaowool). For Task 3
the selected gases were: acetylene, ethylene, heptane,
ethanol, propanol, propane, butanol and mixtures of
heptane-ethane and hydrogen-methane. Dusts chosen include
starch, sulphur and lycopodium. Industry and standards
organisations have been invited, by means of a publicity
campaign, to put forward their views on further gases,
dusts and materials which are of particular importance to
industry.
Fields of science (EuroSciVoc)
CORDIS classifies projects with EuroSciVoc, a multilingual taxonomy of fields of science, through a semi-automatic process based on NLP techniques. See: The European Science Vocabulary.
CORDIS classifies projects with EuroSciVoc, a multilingual taxonomy of fields of science, through a semi-automatic process based on NLP techniques. See: The European Science Vocabulary.
- engineering and technology electrical engineering, electronic engineering, information engineering electronic engineering sensors optical sensors
- natural sciences chemical sciences organic chemistry hydrocarbons
- natural sciences physical sciences optics
- natural sciences chemical sciences organic chemistry alcohols
- natural sciences chemical sciences organic chemistry aliphatic compounds
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Programme(s)
Multi-annual funding programmes that define the EU’s priorities for research and innovation.
Multi-annual funding programmes that define the EU’s priorities for research and innovation.
Topic(s)
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Calls for proposals are divided into topics. A topic defines a specific subject or area for which applicants can submit proposals. The description of a topic comprises its specific scope and the expected impact of the funded project.
Call for proposal
Procedure for inviting applicants to submit project proposals, with the aim of receiving EU funding.
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Procedure for inviting applicants to submit project proposals, with the aim of receiving EU funding.
Funding Scheme
Funding scheme (or “Type of Action”) inside a programme with common features. It specifies: the scope of what is funded; the reimbursement rate; specific evaluation criteria to qualify for funding; and the use of simplified forms of costs like lump sums.
Funding scheme (or “Type of Action”) inside a programme with common features. It specifies: the scope of what is funded; the reimbursement rate; specific evaluation criteria to qualify for funding; and the use of simplified forms of costs like lump sums.
Coordinator
SW7 2AZ LONDON
United Kingdom
The total costs incurred by this organisation to participate in the project, including direct and indirect costs. This amount is a subset of the overall project budget.