Marwal Systems

Karim Ouenniche

Karim Benghezal

The invention concerns a device for measuring liquid level, comprising a detection set (Si) including two piezoelectric cells ( ) associated with control means for transmitting ultrasonic waves respectively opposite a reference reflector ( ), located at a known distance (D) from the associated cell, and from the top surface ( ) of the liquid, and processing means for determining the level of liquid by operating on the respective propagation times of the ultrasounds emitted by each of the two cells ( ). The invention is characterised in that it comprises means for defining, after the device has been charged, an initialising phase ( bis) during which the control means control the piezoelectric cells ( ) such that the ratio between the excitation rate of the reference cell ( ) and that of the level-measuring cell ( ) is higher than the ratio between those same rates during the subsequent stabilised measuring phase ( ).

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Conde sur Marne, France

Karim Ouenniche