Ultrasonic level gauge

2019-08-21
 Ultrasonic level gauge
The working principle is that the ultrasonic transducer (probe) emits a high-frequency pulse 
sound wave. When the surface of the measured object (material) is reflected and folded back, 
the reflected echo is received by the transducer and converted into an electrical signal. The 
propagation time of the sound wave and the sound wave are emitted. The distance to the surface 
of the object is proportional. The relationship between the acoustic wave transmission distance 
S and the sound velocity C and the acoustic transmission time T can be expressed by the 
formula: S=C×T/2.
 
Since the transmitted ultrasonic pulse has a certain width, the reflected wave and the 
transmitted wave in a small region closer to the transducer overlap, and cannot be recognized, 
and the distance value cannot be measured. This area is called the measurement dead zone. The 
size of the blind spot is related to the model of the ultrasonic level gauge.
 
The probe part emits ultrasonic waves, which are then reflected by the liquid surface, and the 
probe part is received again. The distance from the probe to the liquid surface is proportional 
to the time the ultrasonic wave passes:
 
Automatic power adjustment, gain control, temperature compensation.
Advanced detection technology and rich software functions adapt to various complex environments.


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