user manual Instruction Manual

DCR-1006A Ultrasonic Controller Rev. A1, 2/14
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• Understanding Ultrasonics
Ultrasonic sensors use a transducer to transmit bursts of ultrasonic sound
waves. Each burst contains a series of pulsed sound waves that emit in the
shape of a cone, reect o the target, and are detected by the sensor. The me
required for the sound waves to travel to and from the target is converted into
a distance measurement by the sensor. Ultrasonic sensing is aected by several
factors including the target surface, distance, size, and angle. The following
consideraons will help ensure the best possible target condions.
Surface
The ideal target surface is hard and smooth. This type of surface will reect a
greater amount of signal than a so or uneven surface. Sound wave absorbent
materials, such as granules and powders, will reduce the operang range of the
sensor and decrease measurement accuracy.
Distance
Sound wave aenuaon increases as the distance traveled increases.
Therefore, targets at longer ranges require beer reecve characteriscs than
targets that are closer to the sensor.
Size
A large object will have a greater surface area to reect the signal than a
smaller one. Therefore, a large target will be detected at a greater distance
than a small target. The surface area recognized as the target will generally be
the poron closest to the sensor.