Inclination sensor

Details Inclination sensor Inclination sensor

1987-03-27

1989-07-11

Niebling, John F.

Geometrical instruments

Indicator of direction of force traversing natural media

Level or plumb, terrestrial gravitation responsive

204400, G01C 906

Patent

active

048469548

ABSTRACT:
An inclination sensor is disclosed which includes a capsule 15 containing a conductive liquid 17 which forms a liquid pendulum and having first and second resistive tracks 11, 13. In a first measuring configuration, the terminals A, B of track 11 are connected to positive and negative voltages respectively and the terminals C, D of resistive track 13 are connected together, to form a sensing electrode. The voltage at terminal B is then adjusted so that the voltage at common electrode C, D, sensed through the conductive liquid 17 is adjusted to be zero. The ratio of voltages at terminals A and B is then related to the position of the conductive liquid 17 relative to the resistive track 11 and thus of the inclination of the capsule relative to horizontal. In an alternative measuring configuration, the roles of the resistive tracks 11, 13 are reversed, to allow the sensor to measure angles in a different angular range.

REFERENCES:
patent: 3604275 (1971-09-01), Fox et al.
patent: 3992951 (1976-11-01), Erspamer et al.
patent: 4028815 (1977-06-01), Buckley et al.
patent: 4167818 (1979-09-01), Cantarella et al.
patent: 4244117 (1981-01-01), Cantarella et al.
patent: 4503622 (1985-03-01), Swartz et al.
patent: 4528760 (1985-07-01), Plummer
patent: 4672753 (1987-06-01), Kent et al.

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