Electronic inclination gauge

Details Electronic inclination gauge Electronic inclination gauge

1979-06-27

1981-01-13

Phillips, Charles E.

Geometrical instruments

Indicator of direction of force traversing natural media

Level or plumb, terrestrial gravitation responsive

G01C 906

Patent

active

042441170

ABSTRACT:
An inclination gauge that includes a bar placeable against a surface to be gauged to determine the degree to which the surface is inclined with respect to the horizontal or vertical. Mounted on the bar is a gravity-sensing potentiometer coupled to a balancing circuit to produce an analog output voltage which has a null value when the bar is placed against a perfectly horizontal or vertical surface and which has a magnitude and polarity or phase that depends on the extent and direction of the deviation from the norm when the surface being gauged is inclined. The analog voltage is converted into a corresponding digital value that is applied to a digital display. The potentiometer is formed by a circular cell partially filled with a pool of semi-conductive liquid and an electrode assembly disposed within said cell and constituted by an annular central electrode and four electrode segments concentrically arranged in quadrature relation about the central electrode, the pool partially immersing the central electrode and the lowermost two of the electrode segments, the distribution of liquid between the immersed electrode segments depending on the inclination of the bar. The electrodes of the assembly are formed of shaped wires which lie in an intermediate plane parallel to the opposing walls of the cell to minimize surface tension effects and to render the potentiometer insensitive to tilt.

REFERENCES:
patent: 3271650 (1966-09-01), Riddle
patent: 4138600 (1979-02-01), Ozols

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