Electronic survey stadia

Details Electronic survey stadia Electronic survey stadia

1992-09-24

1995-03-28

Buczinski, Stephen C.

Optics: measuring and testing

Range or remote distance finding

Triangulation ranging to a point with one projected beam

33293, 33294, 356 401, G01C 300, G01C 308, G01C 1506

Patent

active

054022231

ABSTRACT:
An electronic survey stadia to ascertain distance and elevation data from a rotary laser beam(s) in relation to known points. To ascertain elevation data stadia is in perpendicular position in relation to rotary laser beam plane. When beam impinges upon stadia, a measurement is taken by evaluation circuit, processed by an algorithm, then stored in memory and output to display device for use. To ascertain distance measurements, stadia is placed parallel in rotary laser beam(s) plane. The stadia self calibrates by counting rotational speed of laser beam. Once RPM and direction are established, stadia then measures time of laser beam to cover a known distance within stadia. This value is then used in an algorithm to produce distance measurements, thus producing distance and elevation data to memory and display.

REFERENCES:
patent: 4029415 (1977-06-01), Johnson
patent: 4730920 (1988-03-01), Schlemmer et al.
patent: 4830489 (1989-05-01), Cain et al.
patent: 4895440 (1990-01-01), Cain et al.

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