Angle measurement device employing angle sensor and electronics

Details Angle measurement device employing angle sensor and electronics Angle measurement device employing angle sensor and electronics

1994-05-23

1996-04-30

Wirthlin, Alvin

Geometrical instruments

Indicator of direction of force traversing natural media

Level or plumb, terrestrial gravitation responsive

G01C 920

Patent

active

055113206

ABSTRACT:
An integral resistive angle measurement device employs a printed circuit board having electronic components mounted on the front surface thereof and having a pair of sensor plates etched into the back surface thereof and a metallic web mounted between the pair of sensor plates on the back surface of the printed circuit board. Containment of the resistive sensor fluid adjacent the sensor plates is accomplished by soldering a sensor cover to an etched sealing ring on the back of the circuit board. The sensor plates etched into the back of the printed circuit board, in combination with the sensor fluid, act as variable resistors whose resistance changes as a function of their angle of rotation from a reference position. An output signal across these variable resistors is in or out of phase with an applied reference signal. The output signal is demodulated with the same reference signal and then filtered to a DC level that corresponds to the angle of rotation. An output stage serves as a driver and also as a means for permitting the user to remotely control the electronic lead of the angle measurement device.

REFERENCES:
patent: 4644662 (1987-02-01), Anderson et al.
patent: 4672753 (1987-06-01), Kent et al.
patent: 4937518 (1990-06-01), Donati et al.
patent: 5014795 (1991-05-01), Gibson
patent: 5083383 (1992-01-01), Heger
patent: 5180986 (1993-01-01), Swartz et al.

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