Ultrasonic sensor in liquid Level measurement

- Jan 21, 2018 -


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.


ultrasonic sensor application in liquid level measurement.jpg

Ultrasonic sensor in liquid level detection


  The principles of ultrasonic  liquid Level measurement

The principles of ultrasonic liquid Level measurement.jpg

Principles of ultrasonic sensor


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.jpg

Principles of measuring distance of ultrasonic sensor

  The example of pulse transmitting  circuit


pulse transmitting circuit of ultrasonic sensor.jpg

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.

 

Previous:The principle of ultrasonic flow meter Next:Ultrasonic sensors apply to parking sensor system