Hydrostatic level and elevation measuring device

Details Hydrostatic level and elevation measuring device Hydrostatic level and elevation measuring device

1988-08-22

1989-11-07

Haroian, Harry N.

Geometrical instruments

Indicator of direction of force traversing natural media

Level or plumb, terrestrial gravitation responsive

G01C 504

Patent

active

048782971

ABSTRACT:
An hydrostatic pressure sensor module is in liquid communication with a body of liquid under ambient atmospheric pressure via an elongated, flexible liquid conduit, the conduit being filled with the liquid. A transducer as a part of the sensor module converts the hydrostatic pressure developed by the liquid in the conduit at the sensor module to a signal which is a function of said pressure, the pressure being a function of sensor module elevation relative to the body of water. The signal is processed according to a transfer function which adapts it to be displayed, the gain of the transfer function being adjustable over a range in order to compensate for undesirable gain variations over an equal or lesser range, for example, due to parametric changes in components. As a part of the transfer function or separately, signal translator adjusts the signal to make it referenced to a second signal which corresponds to an arbitrarily set reference level. In one embodiment low and high elevation limit circuits give an indication, for example audible sound, when the sensor module is within adjustable preset limits.

REFERENCES:
patent: 2703985 (1955-03-01), Jackson
patent: 3815423 (1974-06-01), Gearhart
patent: 4145817 (1979-03-01), Ager
patent: 4218919 (1980-08-01), Stephenson et al.
patent: 4356639 (1982-11-01), Opazo
patent: 4397099 (1983-08-01), Gaucher et al.
patent: 4651433 (1987-03-01), Mohr

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