Horizontal position error correction mechanism for electronic le

Details Horizontal position error correction mechanism for electronic le Horizontal position error correction mechanism for electronic le

1996-11-22

1998-07-07

Voeltz, Emanuel Todd

Boots, shoes, and leggings

364559, 356 408, 356 403, 33291, 33293, G01C 308, G01C 900

Patent

active

057778990

ABSTRACT:
In a horizontal position error correction mechanism for an electronic level according to the present invention, a collimation optical system collimates a level rod, and a calculation processing device processes an output signal of a photoelectric converter by calculation to calculate a difference of elevation and so forth. A compensator device formed on a telescope optical system for maintaining a horizontal position corrects an inclination of the electronic level to maintain the horizontal position of the electronic level, and a suspended optical member suspended from the compensator device is rocked in forward and backward directions and leftward and rightward directions in response to an inclination of the compensator device. Inclination angle detection device detects an inclined angle of the suspended optical member, and the calculation processing device calculates an inclination angle data signal of the compensator device based on a detection signal of the inclination angle detection device so that the horizontal position error of the suspended optical member can be corrected.

REFERENCES:
patent: 3736058 (1973-05-01), Iadarola
patent: 4484816 (1984-11-01), Ohtomo et al.
patent: 5430548 (1995-07-01), Hiroi et al.
patent: 5459932 (1995-10-01), Rando et al.
patent: 5524352 (1996-06-01), Rando et al.
patent: 5537200 (1996-07-01), Kumagai et al.
patent: 5537201 (1996-07-01), Kumagai et al.

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