TECHNICAL EXPLANATION
The following explains the method of
our unit in relation to water motion below the surface. All tests occured in
the same swimming pool of 12 meters in lengh (approx. 13 yards) with the same
filled hot water bottle of 3 kg (approx. 7 pounds).
For the tests, we positioned the hot
water bottle on the side of the pool and gently nudged it into the water with
the foot (falling a distance of approx. 15 cm [approx. 6 inches]). The unit was
positioned at a distance of
11,5 meter (approx. 12 yards) from the falling point.
When the hot water bottle fell, the
heaviest end sank slowly to bottom. It created a kind of shovel movement in the
water which travelled horizontally
beneath the surface and bounced off the sides of the pool. After a few
yards, no movement was seen on the surface. We established in all tests that
the energy created by the bottle falling into the water was reliably registered
by our unit in a distance of about 12 yards. Due to the travel time of the
water and the reflection from the walls of the pool, we could also register a
three-time impact of the water on the walls at a distance of 13 yards. This
means a range of 60 meters (around 66 yards). Taking into consideration that
the water density loses energy when it hits the pool walls, we can assume that
in larger pools, i.e. olympic sizes, a bigger range can be reached.
Something about the funnel and the integrated
free-pivoting flap:
As soon as the water density,
initiated by the hot water bottle, arrives at the funnel, a part of the density
meets the flap (cought by the special shape of the funnel). The water that is
running by creates a below atmospheric pressure behind the flap that disperses
when the current has past, moving the flap. Due to the created force and
suction movement, the wide monitoring ranges can be explained.
The conventional opinion of swimming
pool builders and flow technicians is that water circulation systems cause a
continous current in the entire pool.
Our method disproves this opinion
and demonstrates that, depending upon the water pressure coming from the inlet
nozzles created by circulation systems, the released current comes in contact
with still water and, after the distance of a couple of a few yards, is forced
to the surface where, only at this point, it disseminates. We took advantage of
this recent finding and applied it in our method.
As you can see with the development
of this method and the design of our unit we have taken adventage of the water
movement in a contained area, so that today we can offer a reliable poolalarm
unit.
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D-10585 Berlin,
Fax (049) (030) 34
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