Radar0 pages

Radar Motion Detectors
Functional principles

Reflection/transmission

Radar or microwaves are electromagnetic
waves such as those emitted by a radio transmitter but with a much higher freqency (> 1
GHz = 1,000,000,000 vibrations/sec.). The way
in which the transmitter and receiver function is
similar to that of a set of scales.

Microwaves are fully reflected by metal (mirror effect), absorbed by water and oxygen
and pass trough many types of plastic and
glass without almost any resistance.

Thanks to the variable horn antenna, the
microwaves emitted by the transmitter can
be directed without any difficulty and are reflected back to the receiver via the floor, walls
and other surfaces. If there is no movement
in the settable, monitored zone, the transmitter and receiver frequency remain the
same, i.e. the zone is clear.
Persons and objects, however, activate the
motion detector as they move through the
monitored zone. The emitted and received
frequencies are no longer identical. The difference between the frequencies is evaluated and transferred via relay or electronic
contacts in the form of a switching pulse. The
natural vibrations of the detector, if these are
particularly strong, also consitute a movement (Doppler effect).

Beam exposure
The microwave power used is perfectly safe
for humans and animals

Reflexion
Mixed configurations

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Typical applications

Transmission

Door/gate
Opening pulse generators for automatic
door and gate systems (high-speed doors)
and barriers.

The only condition that must be fulfilled here
is:
The object must move at a rate of at least
10 cm/s in order for it to be detected.

Elevators
For monitoring the area in front of the elevator and to prevent the doors from closing
prematurely.

Response
Microwave reflection and the resulting response are determined by three main parameters. The greater the reflecting surface
and the veloctiy of the object detected, the
more effectively the reflections can be
evaluated. As far as the penetration angle is
concerned, the evaluatable signal amplitude
is at its greatest when the object approaches
the radar sensor head on.

Reflecting surface
Velocity
Angle

67ϒ = 0,4 x V

The Radar Motion Detectors in the RK 30
series can now be housed together with
the static sensor system RMT in the same
robust, aluminium housing. The radar sensors with the Active Infrared System RMT
protect people and material assets (fork lift
trucks, vehicle body parts etc.)

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How we combat
interference
In addition to know influencing factors such
as rain, snow, fluorescent lamps, fundamental vibrations of door drives etc., there has
also been a steady increase in parasitic interference caused by mobile phones, radio
and X-ray equipment etc. (so-called electrosmog).

Transportation systems
Control sensor for mobile traffic light systems, monitors and sensors for motorway
approach roads, traffic flow control and
counting systems.
Building services management systems
Presence detectors for controlling lighting,
air conditioning, heating, in telephone
booths, small conference rooms, cashpoint
areas offices etc. Contact-free water control
for valves and fitting, urinals, showers etc.

Optimised circuits with wide-band filters and
other suppression components provide extensive protection for REGLOMAT motion
detectors. We were the first manufacturer
to design mobile-phone-proof devices with
analogue evaluation and our most recent
digital series is immune to all known telecommunications networks.

0ϒ=V

Direction recognition
The radar sensors are capable of distinguishing between movement towards the detector
(= signal) and movement away from the detector (= no signal).

Antenna
The microwaves are concentrated and
guided by the adjustable horn antenna
(patented).

Sliding and draught-proof doors, lift and
vehicle doors etc. can be closed up to 50%
faster. Environmental avareness, energy and
cost savings are not just empty promises.

Please feel free to contact our
consultants for further information on
integrated applications.