Tilt detecting system and tilt detecting method
First Claim
1. A tilt detecting system comprising, a surveying instrument having a distance measuring function and a line laser projecting unit installed as horizontally rotatable for projecting a vertical line laser, and a photodetection device having at least two photodetection units provided at a known interval, a target with a retro-reflectivity and an arithmetic unit, wherein said line laser projecting unit is rotated, each of said photodetection units are made to scan said line laser and said arithmetic unit detects a tilting angle of said photodetection device based on a deviation between a photodetection time moment of each photodetection unit and the distance measurement result of said target of said surveying instrument.
1 Assignment
0 Petitions
Accused Products
Abstract
The invention provides a tilt detecting system comprising, a surveying instrument having a distance measuring function and a line laser projecting unit installed as horizontally rotatable for projecting a vertical line laser, and a photodetection device having at least two photodetection units provided at a known interval, a target with a retro-reflectivity and an arithmetic unit, wherein the line laser projecting unit is rotated, each of the photodetection units are made to scan the line laser and the arithmetic unit detects a tilting angle of the photodetection device based on a deviation between a photodetection time moment of each photodetection unit and the distance measurement result of the target of the surveying instrument.
29 Citations
15 Claims
- 1. A tilt detecting system comprising, a surveying instrument having a distance measuring function and a line laser projecting unit installed as horizontally rotatable for projecting a vertical line laser, and a photodetection device having at least two photodetection units provided at a known interval, a target with a retro-reflectivity and an arithmetic unit, wherein said line laser projecting unit is rotated, each of said photodetection units are made to scan said line laser and said arithmetic unit detects a tilting angle of said photodetection device based on a deviation between a photodetection time moment of each photodetection unit and the distance measurement result of said target of said surveying instrument.
- 11. A tilt detecting method comprising, a step of projecting a vertical line laser from a line laser projecting unit installed on a surveying instrument, a step of horizontally rotating said line laser projecting unit around an optical axis of a tracking light as a center and scanning said line laser so as to pass at least two photodetection units installed at a known interval on a photodetection device, a step of measuring a distance to a target of said photodetection device by said surveying instrument, and a step of detecting a tilting angle of said photodetection device based on a deviation of photodetection time when each photodetection unit of said photodetection device is made to receive said line laser.
Specification