Temperature compensated annunciator
AssigneesAutronics Corporation, Mass Systems Inc.
InventorsAbdul N. Sitabkhan, James W. Tseng
Life of this patent
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Abstract
A solid state temperature compensated annunciator is disclosed. The solid state temperature compensated annunciator includes a pressure sensor for measuring a pressure of the fillant within a vessel and a temperature sensor for measuring the temperature of the fillant within the vessel. The solid state temperature compensated annunciator determines a pressure that the vessel would have if the vessel were filled with a predetermined amount of fillant, and compares the measured pressure to the determined pressure. If the measured pressure is below the determined pressure, a warning signal is issued.
Claims5
A temperature compensated annunciator for monitoring an amount of fillant in a pressurized vessel comprising:
- temperature sensor means for determining a temperature of said fillant and generating a temperature signal corresponding to said fillant temperature;
- pressure transducer means for measuring the pressure within said pressurized vessel and generating a pressure signal corresponding to said measured pressure;
- fillant amount determining means for receiving the temperature signal from said temperature sensor means and determining a calculated pressure corresponding to a minimum operational fillant level of said pressurized vessel;
- judging means for judging whether said measured pressure in said pressurized vessel is below said calculated pressure corresponding to said minimum operational fillant level;
- signaling means for signaling a user when said judging means judges that said measured pressure in said pressurized vessel is below said calculated pressure;
- storage means for storing a value corresponding to the measured pressure;
- leak detection means for determining a reduction in the amount of fillant in the vessel by comparing the pressure measured by the pressure transducer means with a previously measured pressure stored in said storage means during a given temperature cycle;
- and
- forecast means for forecasting, if said leak detection means determines a reduction in the amount of fillant, when said fillant amount will be less than said minimum operational fillant level.
Dependencies are inferred from the claim text.