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US 5,351,188 AGranted
Electronic depth meter
AssigneeCasio Computer Co., Ltd.
InventorHiroshi Sato
Life of this patent
Estimating the term…
Abstract
The respective partial pressures of an inert gas in the tissues of a human body different in saturation half-time are calculated from the sensed ambient pressure during diving. The respective remaining times of the tissues up to the non-decompression limit are calculated from the obtained partial pressures of the inert gas and are displayed simultaneously on a graphic display.
Claims41
An electronic depth meter comprising:
- pressure sensing means for sensing the ambient pressure of the depth meter to generate data representative of the sensed pressure;
- diving data generating means for receiving the data representative of the pressure generated from said pressure sensing means to generate data representative of the levels of an inert gas dissolved in a plurality of body tissues under water;
- limit value data storage means for storing data representative of respective limit values for the plurality of tissues within which limit values the corresponding tissues can ascend to the surface of water without decompression;
- remaining time data generating means for receiving data representative of the respective levels of an inert gas dissolved in the plurality of tissues from said diving data generating means and data representative of the corresponding limit values from said limit value data storage means to generate data representative of the respective remaining times up to the corresponding limit values at which the respective tissues are required to be decompressed;
- display means for simultaneously and graphically displaying data on the respective remaining times for the plurality of tissues generated by said remaining time data generating means.
2 more elements
An electronic depth meter comprising:
- pressure sensing means for sensing the ambient pressure of the depth meter to generate data representative of the sensed pressure;
- diving data generating means for receiving the data representative of the pressure produced by said pressure sensing means to generate data representative of the respective levels of an inert gas dissolved in a plurality of body tissues under water and data representative of the level of an inert gas in the breathed gas;
- limit value data storage means for storing data representative of respective limit valves for the plurality of tissues within which limit values the body tissues can ascend to the surface of water without decompression;
- remaining time generating means for receiving data representative of the levels of the inert gas dissolved in the plurality of tissues from said diving data generating means and data representative of the limit values from said limit value data storage means to generate data representative of the respective remaining times up to the corresponding limit values for non-decompression diving;
- tissue detecting means for detecting a tissue having the shortest remaining time among the plurality of tissues;
- ratio data generating means generating data representative of a ratio of the data representative of the level of inert gas in the breathed gas to the data representative of the level of the inert gas in the tissue detected by said tissue detecting means;
- display means for displaying the data representative of the ratio generated by said percentage generating means.
4 more elements
An electronic depth meter comprising:
- pressure sensing means for sensing the ambient pressure of the depth meter to generate data representative of the sensed pressure;
- diving data generating means for receiving the data representative of the pressure generated by said pressure sensing means to generate data representative of the respective levels of an inert gas dissolved in a plurality of body tissues and data representative of the level of an inert gas in the breathed gas;
- display means for displaying data representative of the respective levels of the inert gas dissolved in the plurality of body tissues and data representative of the level of the inert gas in the breathed gas simultaneously side by side on the same scale.
An electronic depth meter comprising:
- pressure sensing means for sensing the ambient pressure of the depth meter to generate pressure data representative of the sensed pressure;
- inert gas level data generating means for calculating levels of an inert gas dissolved in a plurality of body tissues of a user under water based on the pressure data generated by said pressure sensing means, and for generating gas level data representative of the calculated levels of the inert gas;
- limit value data storage means for storing limit value data representative of limit values for the plurality of body tissues, the limit values representing values, respectively, which allow the body tissues to ascend to a surface of water without decompression;
- calculating means for calculating a percentage of the level of the inert gas dissolved in one of the body tissues, which percentage is represented by the gas level data generated by said inert gas level data generating means, relative to the limit value for said body tissue which is represented by the limit value data stored in said limit value data storage means, and for generating percentage data representative of the calculated percentage of the level of the inert gas to the relevant limit value;
- and
- display means for display the percentage data generated by said calculating means.
3 more elements
Dependencies are inferred from the claim text.