Optics: measuring and testing – Range or remote distance finding – With photodetection
Patent
1990-11-28
1993-04-20
Buczinski, Stephen C.
Optics: measuring and testing
Range or remote distance finding
With photodetection
356 4, 356 5, 356152, 359530, G01C 300, G01C 308, G01B 1126
Patent
active
052047318
ABSTRACT:
The invention relates to a method and apparatus for measuring the coordinates of a survey point. The apparatus uses a reflecting mirror at the survey point, a tachymeter for transmitting light to the reflecting mirror and for receiving light reflected from the reflecting mirror, first calculating means for calculating the coordinate values of two positions of the reflecting mirror, and second calculating means for calculating a coordinate value of the survey point from the coordinate values of the two reflecting mirror positions. In operation, the tachymeter transmits light to the reflecting mirror at the survey point wherein the reflecting mirror is locatable at two points present on a line passing through the survey point and which are separated from the survey point by predetermined distances. Using the reflected light from the two reflecting mirror positions, the tachymeter calculates distances between the tachymeter and the reflecting mirror at the two points from a phase difference between a received signal based on the reflected light and a reference signal. Further, the tachymeter calculates the coordinates of the survey point from a horizontal plane angle and a vertical plane angle of the reflecting mirror positions. Finally, the coordinate value of the survey point is calculated from the coordinate values of the two reflecting mirror positions.
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Endo Masamitsu
Fukawa Haruo
Hayama Yasuo
Kadowaki Ichiro
Tanaka Masayoshi
Buczinski Stephen C.
Sokkisha Co. Ltd.
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