The functional principle is based upon the ultrasonic echo-transit
time method. RIS is equipped with 2 sensors which emit a steady
intermitting ultrasonic signal. The sensors operate both as
transmitters and receivers, which receive again the beamed and
reflected ultrosonic signals from possible obstacles. The
distance from the obstacle is evaluated through the transit
time of the evalutated siganls and is indicated by sequence
of pulse tones of the piezo-speaker. The closer the obstacle,
the faster the sequence of pulse tones. |
Detection range and tone sequence
The following extract were
published in the December 1999 WHICH
CAR publication;
End 'touch and go' parking
Ever
wondered how the owners of large luxo barges manage to park
their pride and joy without bumping other cars? Well, more
than likely, it isn't just skill. They're probably using
a discreet parking aid to help them find their mark.
Parking sensors in the rear bumpers of luxury cars can make
precision parking a breeze.
Ultrasonic sensors built into the bumpers provide an audible
or visual indication of the distance between the car and
any object in front or behind it.
RIS - Reverse Impact Sensor - is a cheaper alternative to
a luxury car and provides the same sort of reversing aid.
The system uses an ultrasonic sensor mounted on the rear
bumper and wired to operate when reverse is selected to
detect objects behind a vehicle. An audible warning provides
three-stage indication of the distance of the object behind
the car.
At 0.9 metres the audible warning starts to beep.At 0.6
metres the frequency of the beeping increases and at 0.3
metres the beeping becomes constant. The system is sensitive
enough to detect even a cyclone wire fence, or to detect
people (like small children) or other objects which may
be out of the drivers line of sight.
Installation should not pose any problem for the average
handy person. RIS comes with a one-year warranty.
Order Form
To order your RIS fill out and submit the details below.
We will then contact you regarding payment and delivery.
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