| 摘要 |
A volume control module for controlling the volume of a fluid such as air in a buoyancy chamber of a buoyancy compensator device comprises a main unit and a selector pad. The main unit includes a main unit housing having a first opening connectable to the buoyancy compensator device and a second opening connectable to an inflator hose assembly. Three pressure sensors, a microprocessing unit, and intake and vent valves are provided in the main unit housing. A first pressure sensor measures ambient pressure; a second measures the pressure inside the buoyancy chamber; and a third measures the air pressure entering the intake valve. The microprocessing unit carries out a variety of buoyancy-control functions responsive to output signals from the pressure sensors. The intake and vent valves are both controlled by the microprocessing unit and are both normally closed. The intake valve is connectable to a source of low pressure fluid, while the vent valve vents fluid from the buoyancy chamber. A manual emergency cutoff switch on the main unit housing can deactivate the microprocessing unit and the first and second valves. An unobstructed first main passage in the main unit housing extends between the first and second openings of the main unit housing. A second main passage extends between the vent valve and the first opening of the main unit housing, and is fluidly connected with the intake valve. An intake passageway in the main unit housing fluidly connects the intake valve with the second main passage. The selector pad connected to the microprocessing unit includes switches for selecting a microprocessing unit function.
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