U.S. patent application number 10/551917 was filed with the patent office on 2006-12-14 for weather proof dome to envelop outdoor objects, use of such a dome and a method for protecting outdoor objects.
This patent application is currently assigned to TRULSTECH INNOVATION AB. Invention is credited to Mats Nilsson.
Application Number | 20060277839 10/551917 |
Document ID | / |
Family ID | 20290946 |
Filed Date | 2006-12-14 |
United States Patent
Application |
20060277839 |
Kind Code |
A1 |
Nilsson; Mats |
December 14, 2006 |
Weather proof dome to envelop outdoor objects, use of such a dome
and a method for protecting outdoor objects
Abstract
The self-supporting weather proof dome envelops outdoor objects.
The dome is made of a material and structure that maintains the
shape of the dome and clearance between the dome and the objects
whereby the dome has an inner structure that withstands external
pressure forces and an outer structure that through pulling forces
on the outer structure holds the inner structure together. The
outer and inner structures are not bonded to each other and at
least the outer structure is attachable to a base mount. The dome
consists of an inner structure made of form rigid cellular plastic.
The enveloped outer structure consists of an UV-resistant plastic
fabric wind-stopper.
Inventors: |
Nilsson; Mats;
(Saltsjobaden, SE) |
Correspondence
Address: |
FASTH LAW OFFICES (ROLF FASTH)
26 PINECREST PLAZA, SUITE 2
SOUTHERN PINES
NC
28387-4301
US
|
Assignee: |
TRULSTECH INNOVATION AB
Saltsjobaden
SE
|
Family ID: |
20290946 |
Appl. No.: |
10/551917 |
Filed: |
April 5, 2004 |
PCT Filed: |
April 5, 2004 |
PCT NO: |
PCT/SE04/00530 |
371 Date: |
October 5, 2005 |
Current U.S.
Class: |
52/80.1 |
Current CPC
Class: |
H01Q 1/42 20130101 |
Class at
Publication: |
052/080.1 |
International
Class: |
E04B 1/32 20060101
E04B001/32 |
Foreign Application Data
Date |
Code |
Application Number |
Apr 7, 2003 |
SE |
0301007-1 |
Claims
1. A self-supporting weather proof dome to envelop outdoor
equipment, the dome being of a material and structure that
maintains the shape of the dome and the clearance between the dome
and the enclosed objects characterized in that the dome comprises
and inner structure (11) that withstands external pressure forces
and an outer structure (12) that through pulling forces on the
outer structure holds the inner structure together, which outer
(12) and inner (11) structures are not bonded to each other and at
least the outer structure is attachable to a base mount
(16,70).
2. A dome according to claim 1 characterized in that also said
inner structure is attachable to said base mount (16,70).
3. A dome according to claim 1 characterized in that the inner
structure (11) includes form rigid cellular plastic.
4. A dome according to claim 1 characterized in that the outer
structure (12) includes a UV-resistant fabric (12).
5. A dome according to claim 4 characterized in that said fabric
(12) is a wind-stopper fabric.
6. A dome according to claim 1 characterized in that a number of
straps (13,15,85-88) are mounted on the outer structure (12), which
straps (13,15, 85-88) are attachable to said base (1) mount (16,70)
to ensure a solid mount of the dome to, the base mount (16,70).
7. A dome according to claim 4 characterized in that said fabric
(12) in its lower part is provided with a number of vertically
directed expansion chambers (101-103) integrated into the fabric
(12) and being equally spread around the dome, the expansion
chambers (101-103) having a draw function to ensure the fabric (12)
to be tighten, enveloping the inner structure (11).
8. A dome according to claim 4 characterized in that said fabric
(12) includes a number of zips (91-93), each zip (91-93) extending
from a lower edge of the fabric (12) and being directed upwards,
preferably up to half of the height of the dome.
9. A dome according to claim 3 characterized in that said cellular
plastic has a thickness such that water condensation inside the
dome is substantially reduced.
10. A dome according to claim 1 characterized in that the dome is
provided with means for maintaining a pressure within the dome that
slightly exceeds the surrounding pressure.
11. A dome according to claim 1 characterized in that the dome is
adapted to envelop electronic radio communication equipment in that
the material of the inner and outer structures are such that radio
waves are able to penetrate the dome.
12. Use of a dome according to claim 1 for protecting outdoor
equipment.
13. A method for protecting outdoor equipment characterized in that
the objects are enveloped in a dome according to claim 1.
14. A method according to claim 13 characterized in that the
pressure within the dome is maintained at a slightly higher
pressure than the surrounding pressure.
Description
FIELD OF THE INVENTION
[0001] A self-supporting weather proof dome to envelop outdoor
objects, the dome being of a material and structure that maintains
the shape of the dome and clearance between the dome and the
enclosed objects characterized in that the dome comprises and inner
structure that withstands external pressure forces and an outer
structure that through pulling forces on the outer structure holds
the inner structure together, which outer and inner structures are
not bonded to each other and at least the outer structure is
attachable to a base mount.
BACKGROUND ART
[0002] Different weather conditions on earth, both on-land an
oceans, put demand on some kind of weather protections regarding
humans and other sensitive outdoor objects. Mostly it concerns
weather protections against heavy wind-loads, rain, snow, arctic
temperature, strong influence of sunshine, UV-radiation etc. The
type of weather protection units varies but often requires a kind
of housing to completely envelop the outdoor objects.
[0003] For example, the weather and its effect on outdoor sensitive
electronic radio equipment put high demands on some kind of weather
protection to ensure equipment functionality.
[0004] It is more cost-effective to envelop the sensitive equipment
with a dome compared to adding a chemical surface protection layer
on each component for outdoor use.
[0005] There are two main types of dome constructions, one based on
a framework equipped with panels the other refers to
self-supporting dome models. In general, frameworks are commonly
used in diameters over 4 meters meanwhile self-supporting
constructions refer to diameters less than 4 meters.
[0006] Two main construction methods, "Single skin" and "Sandwich"
models represent self-supporting domes. They are both in plastics
made by manually hands-on work, which make them rather expensive to
produce.
[0007] "Single skin" is the most common and less expensive
self-supporting dome construction. It is made of glass-fibre and
polyester with gel coat on top, all bonded together. "Sandwich" is
based on two very thin plastic structures, separated by a laminate
of Honeycomb, Divinycell or Rawcell. The two thin plastic
structures are bonded together with the laminate. In military
applications Rawcell is most common due to less signal gain
attenuation compared to the others. However, it is at least a 3
times more expensive material compared to Divinycell. "Sandwich"
constructions dominate regarding professional outdoor terminals
operating in microwave frequency bands over 10 GHz, to meet
required functionality and high efficiency.
[0008] Both "Single skin" and "Sandwich" domes are very heavy
constructions, putting hard demands on the mechanical mounting bed
to be stiff enough to carry such a dome. Often, the total mass load
of domes exceeds the mass of the item domes are aimed to protect.
That puts a very hard demand on the base-mount in terms of
mechanical structural strength, being able to carry the dome with
the equipment inside without generating mechanical flexibility.
[0009] To obstruct geometrical deformation, self-supporting plastic
domes are moulded in segments, often named panels. Panels
representing two orthogonal curvatures of the characteristic are
the most frequent existing models.
[0010] In radio communications, electronic equipment is used to
transmit and receive radio signals. The higher signal frequency in
use, the higher demands on the housing signal transparency. The
self-supporting dome is not allowed to affect the transmitting or
receiving signal frequencies, especially not in terms of signal
gain or cross-polarisation. Due to that, the demands on a
self-supporting plastic dome material are extremely high in terms
of electrostatics, electromagnetic transparency, and material
thickness, meanwhile meeting the hardest environmental weather
conditions, generated by wind-loads, temperature and UV-radiation
in combination with air pollution.
[0011] Mostly, the shape of domes is more or less spherical, often
half-spherical standing on a cylinder foot. Primarily, the
geometrical shape depends on the intention getting a higher signal
beam transparency by a minimum of radio signal reflection and
signal gain attenuation through the dome. Secondly, a spherical
dome reduces the surface pressure effects, generated by wind-loads,
The demands on a self-supporting dome in terms of material
structural strength and high signal transparency, in the microwave
frequency range, put the terms regarding the choice of plastic dome
material. The higher radio signal frequency in use, the less
thickness of the plastic dome material can be accepted. In
practice, the thickness of the dome material, in respect to its
permeability, never ought to exceed 1/4 of the electromagnetic
radio signal wavelength in use. For example 12 GHz refers to a
wavelength of 25 mm, which refers to an acceptance of 6 mm
thickness of the dome material, in respect to a correction
regarding its permeability.
[0012] Maritime satellite communication (SATCOM) offering
monitoring services represents one of the fastest growing business
markets of today and put requests on reliable, small sized
self-supporting domes (d<4 m) with no impact on the radio
microwave frequency signals transmitted cross the dome material. In
accordance to SATCOM market requirements and traffic signal
frequencies, the self-supporting dome constructions are best
meeting the demands.
[0013] There even exist a number of other odd constructions
offering a kind of weather protection similar to a tent. It is
based on a typical framework, covered by a fabric. The fabric is
very hard tightened to the framework, which only support the fabric
in a few spots. However, this type of technical solution put
demands on the fabric to handle heavy wind-loads with a very strong
impact on the fabric, often much over the material elastic limit,
followed by a material stress, with a collapse as the result. The
fabric material fatigue occurs very quickly due to the ongoing
material stress caused by friction between fabric and framework,
especially in maritime applications under impact from UV radiation,
salt and sulphuric air pollutions, the fabric collapse. Sometimes
it happens that fabric elasticity causes a geometrical deformation
with a concave fabric structure between parts of frameworks under
impact from heavy wind-loads, putting the whole dome in motion
generating mechanical problems inside the dome, often ending-up
with a operational drift-stop.
[0014] The invention meets all mentioned known requirements put on
a self-supporting weather proof dome to envelop outdoor objects
like protecting humans and other sensitive outdoor equipment in
terms of thermal insulation, UV-protection, mechanical structural
stiffness, rigidity, material stress and permeability. At the same,
the invention offers an industrial robotic serial production of
domes with a minimum of manual hands-on labor work to produce
domes, which dramatically have a great impact on dome production
costs. A modest production cost opens a number of new different
markets and applications. Except for all maritime applications, the
modest production cost makes the self-supporting weather proof dome
available to replace ordinary tent models, for example in arctic
expeditions, military applications, but also in rescue and
surveillance operations. Primarily, due to the excellent thermal
insulation, extremely low weight and simplicity in mounting and
demounting on-site, wherever it might be from arctic climate to
strong sunshine in deserts, under impact of heavy wind-loads.
DESCRIPTION OF THE INVENTION
[0015] This object has been achieved in that a dome of type
specified in Claims no. 1 includes the specific features that the
dome comprises an inner structure that withstands external pressure
forces and an outer structure that through pulling forces on the
outer structure holds the inner structure together, which outer and
inner structures are not bonded to each other and at lest the outer
structure is attachable to a base mount. The dome construction with
an outer structure and an inner structure, not bonded to each
other, meet all demands on a self-supporting dome--a weather proof
unit--in terms of mechanical structure stiffness, rigidity,
material stress, thermal insulation, signal gain attenuation and
cross-polarisation etc. The inner structure offers required
mechanical structure stiffness and rigidity by offering a
geometrical momentum generated by thickness of the inner structure
material, consisting of a large number of cells filled with air,
giving acceptance to required electromagnetic transmission in
microwave frequency bands with a minimum of signal gain attenuation
through the inner structure in combination with a good thermal
insulation. Further, the dome construction according to the present
invention with an outer and inner structure, not bonded to each
other, gives an advantage in that it offers an extended surface
load compared to other known similar constructions like a tent
model described by a number of point loads between a framework and
a fabric mounted tightened on top of it generating friction and
material stress. All advantages concerning the present invention
offers to a minimum of manually hands on labour work
investment.
[0016] According to an embodiment of the invention that protects
electronic equipment a dome characterized in that also said inner
structure is attachable to said base mount which offers a fixed
position and required clearance between the dome and the enclosed
equipment.
[0017] Further a dome characterized in that the inner structure
includes form rigid cellular plastic makes it available to increase
the thickness of the inner structure material to get required
geometrical momentum to withstand external pressure forces on the
dome. Meanwhile form rigid cellular plastic consists of a large
number of cells filled with air, offering a minimum of signal gain
attenuation ref to a microwave signal beam frequency. Due to the
cellular plastic material density the total weight of the inner
structure becomes extremely low making it easy to handle, reducing
the time required to build-up the dome on site, due to simplicity
in mounting and demounting. The dome construction with an outer
structure and an inner structure not bonded to each other, in
combination with a low weight, geometrical structure, mechanical
stiffness and rigidity results in a minimum of material stress.
[0018] Further a dome characterized in that the outer structure
includes a UV-resistant fabric to protect the inner structure from
being destroyed by UV radiation improve the dome construction.
Especially, as UV-radiation is strong in areas close to the
equator, but also on oceans, due to the characteristics of water
regarding reflections of UV-beams. As the outer structure is not
bonded to the inner structure it makes it easy to replace the outer
structure if of some reason it requires. The outer structure fabric
can also be provided in different colours to meet individual
requirements to a budget cost investment.
[0019] Further a dome characterized in that said fabric is a
wind-stopper fabric aimed to keep the material structural form,
regardless of wind-loads, snow or rain.
[0020] Further a dome characterized in that a number of straps are
mounted on the outer structure, which straps are attachable to said
base mount to ensure a solid mount of the dome to the base mount
offers a improved capability to withstand heavy wind-loads
connected to stormy weather conditions on oceans.
[0021] Further a dome characterized in that said fabric in its
lower part is provided with a number of vertically directed
expansion chambers integrated into the fabric and being equally
spread around the dome, the expansion chambers having a draw
function to ensure the fabric to be tighten, enveloping the inner
structure, which improves the dome functionality in terms of
maximal fitting and by generating turbulence wind streaming around
the expansion chambers stopping wind-loads to form and destroy the
fabric in stormy weather conditions on oceans.
[0022] Further a dome characterized in that said fabric includes a
number of zips, each zip extending from a lower edge of the fabric
and being directed upwards, preferably up to half of the height of
the dome makes it easy to mount the fabric on top of the inner
structure, but also making it easy to open, giving access to the
inner structure and a via a hatch entrance to the protected outdoor
equipment.
[0023] Further a dome characterized in that said cellular plastic
has a thickness such that water condensation inside the dome is
substantially reduced. The reason is the cellular plastic. It
consists of a large number of cells filled with air, offering an
excellent and required thermal insulation moving the dew point
outwards.
[0024] Further a dome characterized in that the dome is provided
with means for maintaining a pressure within the dome that slightly
exceeds the surrounding pressure, offering an extra protection
guard against wind saturated with salt penetrating the outer and
inner structure reaching the dome protected outdoor objects.
[0025] Further a dome characterized in that the dome is adapted to
envelop electronic radio communication equipment in that the
materials of the inner and outer structures are such that radio
waves are able to penetrate the dome with no harm referred to the
permeability of the dome in terms of signal gain attenuation and
cross-polarisation.
[0026] The invention concerns both an application of the invented
dome and to a method fro protecting outdoor objects, in particular
electronic radio communication equipment, characterized in that the
objects are enveloped in a dome and the pressure within the dome is
maintained at a slightly higher pressure than the surrounding
pressure.
DESCRIPTION OF FIGURES
[0027] An embodiment of the innovation is described in connection
to enclosed drawings, schematically in accordance to the invention
by
[0028] FIG. 1 shows a principle view of a dome,
[0029] FIG. 2 shows a part from a side, in an above angle, a
structure of pentagonal segments,
[0030] FIG. 3 shows the same structure as in FIG. 2, from above
[0031] FIG. 4 shows a segment being a part of the structure in
accordance to FIG. 2-3,
[0032] FIG. 5 shows a structure consisting of a segment in shape
similar to a piece of an orange,
[0033] FIG. 6 shows a cylinder basement carrying the plastic dome
above, in accordance to FIG. 2-3 or FIG. 5,
[0034] FIG. 7 shows a part of a modified mechanical joint basement
ring, in accordance to FIG. 6,
[0035] FIG. 8 shows a dome from a side with the outer structure in
accordance to FIG. 5,
[0036] FIG. 9 shows a dome from a side with the outer structure
equipped with three zips, and
[0037] FIG. 10 shows the outer structure equipped with three
expansion chambers as a part of the outer structure.
DETAILED DESCRIPTION OF AN EMBODIMENT OF THE INVENTION
[0038] The following example of the invention interacting functions
composition comprise in accordance to FIG. 1 of a dome that has a
partly spherical housing 11-12 consisting of an inner structure 11
of a form rigid cellular plastic and an outer structure 12 of a UV
resistant, wind-stopping fabric. Attached to the outer structure 12
there are a number of straps 13-15 mounted to tighten the cellular
plastic housing 11-12 to the deck mount. The partly spherical
plastic housing 11-12 is fixed mounted in a horizontal, mechanical
joint of a cylindrical base ring 16, mounted direct to the
base.
[0039] An application of a dome, that at the same time fulfil
earlier given demands on such a type of weather protection housing
unit, preferably can be made of form rigid cellular plastic,
without any additives of metal components or flame retardants with
a certain impact on the material permeability. In practice, such
metal component additives have shown a reduction of using of any
plastic material in the electromagnetic axis of the antenna,
transmitting microwave radio communication signal frequency.
Cellular plastic is an excellent material, fitting well, making a
self-supporting housing framework described by a partly spherical
dome. The form rigid cellular plastic can preferably be
manufactured in smaller segments of double curvature areas and put
together to requested geometrical figures by a kind of joint
adaptation.
[0040] The shown inner surface structure in FIG. 2 consists of a
number (12 pieces) of pentagonal double curvature segments of
cellular plastics mounted together, and FIG. 3 show the same inner
structure from above.
[0041] FIG. 4 shows in perspective one of the segments of the inner
structure in accordance to FIG. 23.
[0042] FIG. 5 shows the outer structure from a side. The outer
structure consists of a number (6 pieces) of long strip vertical
segments, in geometric like pieces of an orange.
[0043] The base of the plastic housing consists of a mechanical
joint of a cylindrical ring, and FIG. 7 shows a part of the
mechanical joint of the cylindrical ring, consisting of two from
the bottom 70 upward stands 71,72. Between these stands the plastic
housing bottom part shall be jointly tightened.
[0044] FIG. 8 shows from a side the outer structure of the plastic
housing. The outer structure consists of segments 81,82 . . . like
pieces of an orange, equipped with straps 85, 86, 87, 88 . . . with
the mission to tighten the housing to the basement.
[0045] FIG. 9 shows the plastic housing from a side equipped with
symmetrical mounted vertical zips 91,92,93 . . . placed around the
housing, as a part of the outer structure. The zips are
conveniently placed below and from the horizon diameter plane
90-90, giving access to open-up the outer structure, easily.
[0046] FIG. 10 shows the outer structure equipped with expansion
chambers 101,102,103 . . . vertically mounted around the housing in
the lower part of the outer structure, being an integrated part of
the same.
[0047] The form rigid cellular plastic housing describes the inner
structure 11. It almost consists of cells filled of air (c.98%)
offering structural mechanical advantages by adding requested
material thickness without disadvantages regarding the material
permeability. As the outer structure is very thin the form rigid
cellular plastic can be substantially thicker offering a
geometrical advantage by the thickness generating required
mechanical momentum to meet external forces impact on a
self-supporting construction concerning heavy wind-loads. Thus the
thickness offers required mechanical construction stiffness with
less signal gain attenuation compared to known "sandwich" domes can
provide to a similar cost.
[0048] In general, form rigid cellular plastic is not UV-resistant.
It has to be protected by an outer structure, with no impact on the
dome permeability. The outer structure has to be very thin with a
minimum of impact on the permeability, meanwhile offering required
UV-resistance and mechanical function, for example in a marine
environmental application area. Together the form rigid cellular
plastic housing and the UV-resistant fabric wind-stopper make a
most excellent and cost-efficient dome construction, complete
compatible with the most expensive domes of "sandwich"
constructions.
[0049] As the total mass of the form rigid cellular plastic housing
is extremely low, the outer structure of the dome has to be
tightened to the base mount by straps to ensure function, even
under stormy weather conditions.
[0050] The fabric is produced by CAD/CAM to offer a maximal
fitting, on top enveloping the cellular plastic housing, becoming
the outer structure. The outer structure is UV-resistant with
capability to offer maximal protection against material stress and
external mechanical forces. At the same, the fabric meets all
requests on permeability with a minimum of impact on microwave
upper band frequency radio communications. The fabric is equipped
with vertical strap interfaces aimed to be tighten to the base
mount, for example to a ship deck. The half spherical top of the
outer structure fabric housing represents a unit fitting together
with the geometrical bottom part. The bottom part of the fabric is
vertically and symmetrically equipped with zips. The zips are
integrated to the outer structure making it easier to mount on top
of the inner structure, the form rigid cellular plastic housing.
Further, the tips make it easy to enter inside the dome. A suitable
hatch entrance in the form rigid cellular plastic housing,
strategically positioned between the zips of the outer structure,
open up entering the inside of the dome, for example to maintain
and making service on the weather protected electronic radio
communication equipment.
[0051] In addition, reducing any wind-loads impact on the
UV-resistant fabric, a draw frame of expansion chambers are
integrated to the fabric tightening the same to a maximal fitting
cover on top of the cellular plastic housing.
[0052] The draw frame operates by a flexible geometrical cylinder
diameter depending on the pressure level in the expansion chambers.
The expansion chambers are integrated to the bottom part of the
outer structure 12, vertically mounted and separated around the
dome offering maximal tension effect. The stretching per extension
chambers refers to the difference in cylinder diameter between no
pressure and maximal allowed pressure. The expansion chambers
consist of a flexible material integrated to the fabric outer
structure, for example a woven polyester plastic containing a
flexible gas cylinder, a hose of rubber. Mounted in a flat
condition, tight to the fabric outer structure, it will
automatically stretch the fabric, as soon as the extension chambers
are pressurized, for example with air, as the diameter of a
cylinder with a fix circumference always are less then half the
circumference, as the ratio refers to [2<.pi.].
[0053] A hose in a flat condition with a width of 30 mm will only
have a width less than 20 mm when it is pressurized. It refers to a
stretching of about 10 mm (=30-20 mm). The expansion chambers make
the fabric stretched, generating a very tight fitting outer
structure on the top of the form rigid cellular plastic panel
housing.
[0054] The expansion chambers vertically mounted around the dome
generate turbulent wind streaming, improving the dome stability
under impact of heavy wind loads.
[0055] The integrated straps offer a fixed dome position against
the base mount, for example a deck on a ship. Due to the straps the
dome meets the marine environmental conditions, expected on a ship,
on a heavy oceans.
[0056] The mounted straps, in combination with zips and for example
"velcro tape", result in an easy mounting of the accurate CAD/CAM
made UV-resistant fabric outer structure.
[0057] The form rigid cellular plastic housing offers an excellent
stiffness against indirect action able to resist a surface high
pressure, distributed via the fabric outer structure. The friction
is extremely high between the stretched fabric and the form rigid
cellular plastic housing, due to the CAD/CAM production method
offering an extremely good fitting between the double curvature
areas in combination with the expansion chambers stretching the
fabric to a maximum of tightness.
[0058] The combination of the panel structure, self-looking after
mounting, support base mount consisting of a mechanical joint
offering a reliable base connection, in example a ship-deck,
together with the outer UV-resistant structure, manufactured to
meet mechanical forces in terms of elongation strain under external
forces impact, for example generated by wind-loads, offers together
a most functional weather protection housing.
[0059] Together with the dome it is recommended to use an
electronic weather station circuit card equipped with sensors
detecting environmental conditions improving the dome
functionality, reducing water-condensation and salt-corrosion on
electronics inside the dome, available due to the excellent thermal
insulation and panel seam tightness. The electronic weather station
circuit card contains anemometer, barometer, hygrometer and
thermometer and circuit breakers for switch on/off fans,
intercooler and heating systems. There are two barometer components
on the circuit card, one measuring the air pressure outside
respectively inside the dome. Together with the anemometer the
dynamic surface pressure against the dome is calculated. The air
pressure inside the dome will then be adjusted to meet the
wind-loads impact on the dome outer structure surface by running
the air inlet fans. When the air pressure inside the dome exceeds
the calculated pressure data outside, the circuit breaker switch on
the electric controlled ventilation pressing out air from inside to
outside the dome. The inside air pressure control and guidance
gives an extra material structure rigidity under heavy wind-loads
with a mechanical impact on the dome by rain or snow.
[0060] Primarily, the method to increase the air pressure inside
the dome refers to a requirement to protect against salt-corrosion
by ocean air saturated with salt, penetrating the dome. By the
hygrometer the relatively air humidity inside the dome is
controlled and set to be about 50-55%. The relatively humidity
controls & guidance by the electronic weather station in
mission to reduce the origin of salt-corrosion, especially with
focus on the electronic RF radio communication components, hereby
protected inside the dome.
[0061] In this example described plastic housing offers an
excellent weather protection, complete comparable with the most
technically advanced domes available on the business market, but in
this case to a dramatically lower production cost. The plastic
housing has required mechanical rigidity, low weight, low
production cost, reduced transport expenses, extremely low signal
attenuation in the microwave frequency upper band, simple and quick
installation on site, spare parts to a budget cost, stabilized
temperature and relative air humidity inside the dome with no risk
for icing and automatic air pressure governor.
* * * * *