The DT-AM Motion Detectors UNUM are professional
state-of-the-art motion sensors engineered with the world's best components and
materials. Every aspect of these sensors provides the most reliable motion sensing
with freedom from false alarms. Additionally the UNUM series introduces in the market
the only detectors with trendy invisible lens, i.e. the lens integrated into the
front cover thanks to E.L.T.™ (Embedded Lens Technology) which takes advantage from
decades of experience in designing professional lens by adopting its own material
to design the entire cover too. DT Motion Detectors UNUM include two motion sensing
systems: microwave Doppler motion sensing and PIR motion sensing. Together, the
two systems' signals are evaluated by proprietary signal processing algorithms,
which reject false alarm conditions while detecting intruders.
The DT-AM Motion Detector UNUM microwave system includes
a modern, compact, DRO-based micro-strip Doppler transceiver, with PCB "patch" antennas.
The Doppler signal is digitally processed to detect intruders and reject distractions.
Constant-motion signals (such as fans) are de-emphasized, and fluorescent light
frequencies are digitally removed. The PIR side starts with a EvenEye™ lens and
a top-quality infrared detector. Next, a modern DSP ASIC (patent-pending) converts
the infrared detector signal into digital form, for best reliability and stability.
Finally, the signal is evaluated by the ASIC's HighBar™ processor, for "best-in-class"
false alarm rejection with excellent intruder detection.
Masks are detected by alteration of the normal PIR/microwave-signal
balance that arises from everyday activities around the sensor within about half
of the set microwave range. For cases where there are continual microwave motion
signals, this mid-range mask detection can be disabled by moving JP1. Additionally,
a secured zone (within 1m of the sensor) is monitored. A person entering this zone
and bringing hands near the sensor will initiate an accelerated mask detection process.
A flashing red LED and open Mask relay indicate masking situation.