Device for providing a gas composition and temperature compensated acoustic measurement of a liquid level

摘要

The present device provides for a gas composition and temperature compensated acoustic measurement of the level of a liquid in a tank. The device comprises a transmitter, a receiver, a processing circuitry, a waveguide for guiding acoustic signals from the transmitter to the liquid level surface and for guiding reflections of the acoustic signals back to the receiver. The waveguide comprises a first end connected to the transmitter, a second end adapted to extend into the liquid, at least one inlet for introducing gas originating from the liquid in the tank into the waveguide, and an outlet for discharging gas out from the waveguide into the tank. The outlet is arranged closer to the first end than at least one of said at least one inlet.

主权项

1. A device for providing a gas composition and temperature compensated acoustic measurement of the level of a liquid in a tank, comprising:
a transmitter adapted to transmit acoustic signals; a receiver adapted to receive reflections of said acoustic signals; a processing circuitry connected to the transmitter and the receiver and adapted to determine the level of the liquid based on the transmitted acoustic signals and the received reflections of the acoustic signals; a waveguide for guiding acoustic signals from the transmitter to the liquid level surface and for guiding reflections of the acoustic signals back to the receiver, the waveguide comprising
a first end connected to the transmitter,a second end adapted to extend into the liquid,at least one inlet for introducing gas originating from the liquid in the tank into the waveguide, andan outlet for discharging gas out from the waveguide into the tank; wherein said outlet is arranged closer to the first end than at least one of said at least one inlet; and a retaining chamber for at least temporarily retaining liquid arranged such that at least one of said at least one inlet forms a fluid connection between the retaining chamber and the waveguide during operation, wherein an absorbing element adapted to collect liquid originating from the liquid in the tank and to release gas originating from said liquid is arranged in the retaining chamber.