Submarine sampler
A flooded bin measurement system is provided that includes a submarine sampler for ascending and descending within a liquid of a bin and for measuring the depth of fluid at the submarine sampler's location. In one embodiment, the submarine sampler may ascend and descend along a vertical guide based on adjustments to it buoyancy compared with the liquid in the bin, which may be controlled manually and/or automatically. The measurement system may include a bubbler system for measuring hydrostatic pressure at the submarine sampler for determining its depth within the fluid of the bin. The submarine sampler may include a device having a hollow interior, an open bottom and an air supply line connected to the hollow interior. According to a further embodiment of the invention, the submarine sampler may be fixed to a line that is connected to a counterweight at its opposite end.
1. A device for measuring a depth of a liquid, comprising:
a line having a first and second end;
a sampler connected to the first end of the line, wherein a depth of the sampler corresponds to the depth of the liquid;
an air supply system fluidly communicating with the sampler to vary buoyancy of the sampler;
a bubbler tube receiving an air flow from the air supply and emitting the air flow when immersed in the liquid;
a regulator measuring back pressure exerted by the liquid in the bubbler tube when the air flow is emitted from the bubbler tube;
a pivot member in contact with the line; and
a counterweight connected to the second end of the line; wherein, the depth of the sampler is measured via the bubbler tube.
2. The device of claim 1 , in which the sampler comprises a closed top and an open bottom.
3. The device of claim 2 , in which the air supply system comprises a valve allowing egression of air from the sampler.
4. The device of claim 2 , in which the air supply system comprises a valve allowing injection of air into the sampler and evacuation of air from the sampler.
5. The device of claim 1 , in which the air supply system comprises an air supply line delivering pressurized air to the sampler.
6. The device of claim 5 , in which the regulator comprises a bubbler tube controller controlling a flow of air from the air supply system to the bubbler tube, an air supply controller controlling air flow from the air supply system to the air supply line, and an evacuation valve controller controlling egression of air from the sampler.
7. The device of claim 6 , further comprising a depth control mechanism configured for electrical communication with the air supply controller and the evacuation valve controller.
8. The device of claim 1 , further comprising a data recorder recording back pressure readings from the regulator.
9. A bin in combination with the device of claim 1 , the bin containing the liquid and a deposit of solids at a bottom thereof.