DEVICE AND METHOD FOR MEASURING LIQUID LEVEL

摘要

A device for measuring liquid level comprises a transducer (11), a distributor (12) and an analyzer (13); wherein, the transducer (11) is configured to emit ultrasonic waves to the distributor (12) and to receive echoed ultrasonic waves returned back from the distributor (12); the distributor (12) is configured to distribute the ultrasonic waves emitted from the transducer (11) in an entire height range of a container (14), so that the distributed ultrasonic waves in the entire height range of the container (14) propagate towards liquid or gas in the container (14) and are reflected to form the echoed ultrasonic waves upon reaching the liquid or gas in the container (14), and to return the echoed ultrasonic waves back to the transducer (11); and the analyzer (13) is configured to determine the liquid level based on a shift of amplitudes of the echoed ultrasonic waves returned back to the transducer (11). A method for measuring liquid level is also provided. With the above solution, the continuous liquid level inside the container can be measured without the influence of bubbles, foams, turbulence, density, and sound speed of the liquid in the container.