Principle
The working principle of the ultrasonic level meter is that the ultrasonic pulse sent by the transducer (probe) meets the surface of the measured medium and is reflected back. Part of the reflected echo is received by the same transducer and converted into an electrical signal. Ultrasonic pulses propagate at the speed of sound waves, and the time interval from emission to reception of ultrasonic pulses is proportional to the distance from the transducer to the surface of the measured medium. The relationship between the distance value S and the speed of sound C and the transmission time T can be expressed by the formula: S=CxT/2.
Features
Because the transmitted ultrasonic pulse has a certain width, the reflected wave and the transmitted wave in a small area close to the transducer overlap, which cannot be identified and the distance value cannot be measured. This area is called the measurement dead zone. The size of the blind zone is related to the model of the ultrasonic level meter.
Thanks to the advanced microprocessor and unique EchoDiscovery echo processing technology, the ultrasonic level meter can be applied to various complicated working conditions.
The "false echo learning" function enables the meter to correctly confirm the true echo and obtain accurate measurement results under multiple false echo conditions.
The transducer has a built-in temperature sensor, which can realize temperature compensation of the measured value.
The ultrasonic transducer adopts complete acoustic matching technology, so that its transmission power can be radiated more effectively, and the signal strength can be improved to achieve accurate measurement.