Tilt meter

Details Tilt meter Tilt meter

1982-04-05

1984-09-04

Haroian, Harry N.

Geometrical instruments

Indicator of direction of force traversing natural media

Level or plumb, terrestrial gravitation responsive

33 1H, G01C 906

Patent

active

044688644

ABSTRACT:
A tilt meter comprises two tilt sensors (110 and 110S, see FIG. 7) in a housing (105). Each sensor acts as two variable resistors (R.sub.s), which together with two fixed resistors (R.sub.F) form a Wheatstone bridge (25), driven by a square wave signal from a drive source (30). The output of the bridge is fed to an electronic circuit (35) which includes a synchronized switch (43) to cut out the spikes (50), which the bridge outputs at the transitions of the square wave. The output of the electronic circuit is a DC signal, whose amplitude indicates tilt magnitude and polarity indicates direction of tilt. The housing (105) is supported on a support surface (102S) by means of 15 legs (116, 117) threaded into nuts of the same metal, and which has a very low thermal coefficient of expansion.

REFERENCES:
patent: 2713726 (1955-07-01), Dixson
patent: 3114209 (1963-12-01), Foody et al.
patent: 4346363 (1982-08-01), Wilhelmson
patent: 4378693 (1983-04-01), Ratcliffe

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