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Ultrasonic liquid Level measurement


Introduction

Because of the advantages of directional ultrasonic transmitter, direction, strength and easy to control, and no touch with the object being measured etc., it is widely used in liquid level measurement. In the measurement, ultrasonic pulse from the sensor (transducer) to issue, reflected by the surface acoustic wave sensor to receive the same after the conversion into electrical signals, then, through the time of transmitting and receiving sound waves to calculate the distance from the sensor to the measured object.


  The principles of ultrasonic liquid Level measurement


Ultrasonic level meter works by ultrasonic pulse from the sensor (transducer) is reflected by the surface acoustic wave sensor to receive the same after the conversion into electrical signals, then, through the time of transmitting and receiving sound waves to calculate the distance from the sensor to the measured object. The relationship between the distance up to the object. L and the reflecting time T is expressed by the following formula :

L=C · T/2

C is the velocity of sound; L is the measured distance; T is the time of transmitting and receiving sound waves

 


Principles of measuring distance

  The example of pulse transmitting circuit

The example of pulse transmitting circuit

  The application field of Ultrasonic liquid Level measurement

The use of ultrasonic level measurement principle can be widely used in meteorological water level measurements, large tank level measurement, level measurement system of salt, testing well water, lakes, canals level, the tank liquid level, fill level in industrial production etc. It can be designed different ultrasonic level meters according to different needs.

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