Liquid level measurement device
AssigneeAxsensor AB
InventorJan Boström
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Abstract
The present invention relates to a device (10) for providing a temperature compensated measurement of the level of a liquid (14) in a tank (12; 30). The device comprises a transducer (22) for transmitting and receiving acoustic signals, and a waveguide (24) connected to the transducer and adapted to extend into the liquid. The device is characterized by means (16; 18; 40) for directing a flow of liquid originating from the tank of along the exterior of a portion of the waveguide which during operation is located above the liquid level. The present invention also relates to a corresponding method for providing a temperature compensated measurement of the level of a liquid in a tank.
Claims15
A device for providing a temperature compensated measurement of the level of a liquid in a tank, comprising:
- a transducer for transmitting and receiving acoustic signals,
- a waveguide connected to the transducer and adapted to extend into the liquid, and
- structure for directing a flow of liquid originating from the tank along the exterior of a portion of the waveguide which during operation is located above the liquid level.
A method for providing a temperature compensated measurement of the level of a liquid in a tank, comprising:
- transmitting an acoustic signal from a transducer into a waveguide adapted to extend into the liquid,
- receiving a reflected acoustic signal to the transducer from the waveguide, and
- directing a flow of liquid originating from the tank along the exterior of a portion of the waveguide which during operation is located above the liquid level.
Dependencies are inferred from the claim text.