Function
The operational principle of an ultrasonic sensor is based on the generation of acoustic
waves and their detection following reflection on an object. Normally, atmospheric air
acts as a carrier of the ultrasonic waves.
A sound generator is actuated for a short period of time and emits an ultrasonic pulse
which is inaudible to the human ear. Following emission, the ultrasonic pulse is reflected
on an object located within range and echoed back to the receiver. The duration of the
ultrasonic pulse is evaluated electronically. Within a certain range, the output signal is
proportional to the signal duration of the ultrasonic pulse.
The object to be detected can be made of different materials. The shape or colour,
solid, fluid or powdery condition do not have any or a very minimal effect on detection.
In the case of objects of smooth, even surface, the surface must be aligned vertically to
the ultrasonic beam.
Function
The operational principle of an ultrasonic sensor is based on the generation of acoustic
waves and their detection following reflection on an object. Normally, atmospheric air
acts as a carrier of the ultrasonic waves.
A sound generator is actuated for a short period of time and emits an ultrasonic pulse
which is inaudible to the human ear. Following emission, the ultrasonic pulse is reflected
on an object located within range and echoed back to the receiver. The duration of the
ultrasonic pulse is evaluated electronically. Within a certain range, the output signal is
proportional to the signal duration of the ultrasonic pulse.
The object to be detected can be made of different materials. The shape or colour,
solid, fluid or powdery condition do not have any or a very minimal effect on detection.
In the case of objects of smooth, even surface, the surface must be aligned vertically to
the ultrasonic beam.
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